
/*
 * jQuery FlexSlider v2.6.0
 * Copyright 2012 WooThemes
 * Contributing Author: Tyler Smith
 */!function($){var e=!0;$.flexslider=function(t,a){var n=$(t);n.vars=$.extend({},$.flexslider.defaults,a);var i=n.vars.namespace,s=window.navigator&&window.navigator.msPointerEnabled&&window.MSGesture,r=("ontouchstart"in window||s||window.DocumentTouch&&document instanceof DocumentTouch)&&n.vars.touch,o="click touchend MSPointerUp keyup",l="",c,d="vertical"===n.vars.direction,u=n.vars.reverse,v=n.vars.itemWidth>0,p="fade"===n.vars.animation,m=""!==n.vars.asNavFor,f={};$.data(t,"flexslider",n),f={init:function(){n.animating=!1,n.currentSlide=parseInt(n.vars.startAt?n.vars.startAt:0,10),isNaN(n.currentSlide)&&(n.currentSlide=0),n.animatingTo=n.currentSlide,n.atEnd=0===n.currentSlide||n.currentSlide===n.last,n.containerSelector=n.vars.selector.substr(0,n.vars.selector.search(" 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//! version : 2.11.2
//! authors : Tim Wood, Iskren Chernev, Moment.js contributors
//! license : MIT
//! momentjs.com
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/*!
 * FullCalendar v2.6.0
 * Docs & License: http://fullcalendar.io/
 * (c) 2015 Adam Shaw
 */

(function(factory) {
	if (typeof define === 'function' && define.amd) {
		define([ 'jquery', 'moment' ], factory);
	}
	else if (typeof exports === 'object') { // Node/CommonJS
		module.exports = factory(require('jquery'), require('moment'));
	}
	else {
		factory(jQuery, moment);
	}
})(function($, moment) {

;;

var FC = $.fullCalendar = {
	version: "2.6.0",
	internalApiVersion: 2
};
var fcViews = FC.views = {};


$.fn.fullCalendar = function(options) {
	var args = Array.prototype.slice.call(arguments, 1); // for a possible method call
	var res = this; // what this function will return (this jQuery object by default)

	this.each(function(i, _element) { // loop each DOM element involved
		var element = $(_element);
		var calendar = element.data('fullCalendar'); // get the existing calendar object (if any)
		var singleRes; // the returned value of this single method call

		// a method call
		if (typeof options === 'string') {
			if (calendar && $.isFunction(calendar[options])) {
				singleRes = calendar[options].apply(calendar, args);
				if (!i) {
					res = singleRes; // record the first method call result
				}
				if (options === 'destroy') { // for the destroy method, must remove Calendar object data
					element.removeData('fullCalendar');
				}
			}
		}
		// a new calendar initialization
		else if (!calendar) { // don't initialize twice
			calendar = new Calendar(element, options);
			element.data('fullCalendar', calendar);
			calendar.render();
		}
	});
	
	return res;
};


var complexOptions = [ // names of options that are objects whose properties should be combined
	'header',
	'buttonText',
	'buttonIcons',
	'themeButtonIcons'
];


// Merges an array of option objects into a single object
function mergeOptions(optionObjs) {
	return mergeProps(optionObjs, complexOptions);
}


// Given options specified for the calendar's constructor, massages any legacy options into a non-legacy form.
// Converts View-Option-Hashes into the View-Specific-Options format.
function massageOverrides(input) {
	var overrides = { views: input.views || {} }; // the output. ensure a `views` hash
	var subObj;

	// iterate through all option override properties (except `views`)
	$.each(input, function(name, val) {
		if (name != 'views') {

			// could the value be a legacy View-Option-Hash?
			if (
				$.isPlainObject(val) &&
				!/(time|duration|interval)$/i.test(name) && // exclude duration options. might be given as objects
				$.inArray(name, complexOptions) == -1 // complex options aren't allowed to be View-Option-Hashes
			) {
				subObj = null;

				// iterate through the properties of this possible View-Option-Hash value
				$.each(val, function(subName, subVal) {

					// is the property targeting a view?
					if (/^(month|week|day|default|basic(Week|Day)?|agenda(Week|Day)?)$/.test(subName)) {
						if (!overrides.views[subName]) { // ensure the view-target entry exists
							overrides.views[subName] = {};
						}
						overrides.views[subName][name] = subVal; // record the value in the `views` object
					}
					else { // a non-View-Option-Hash property
						if (!subObj) {
							subObj = {};
						}
						subObj[subName] = subVal; // accumulate these unrelated values for later
					}
				});

				if (subObj) { // non-View-Option-Hash properties? transfer them as-is
					overrides[name] = subObj;
				}
			}
			else {
				overrides[name] = val; // transfer normal options as-is
			}
		}
	});

	return overrides;
}

;;

// exports
FC.intersectRanges = intersectRanges;
FC.applyAll = applyAll;
FC.debounce = debounce;
FC.isInt = isInt;
FC.htmlEscape = htmlEscape;
FC.cssToStr = cssToStr;
FC.proxy = proxy;
FC.capitaliseFirstLetter = capitaliseFirstLetter;


/* FullCalendar-specific DOM Utilities
----------------------------------------------------------------------------------------------------------------------*/


// Given the scrollbar widths of some other container, create borders/margins on rowEls in order to match the left
// and right space that was offset by the scrollbars. A 1-pixel border first, then margin beyond that.
function compensateScroll(rowEls, scrollbarWidths) {
	if (scrollbarWidths.left) {
		rowEls.css({
			'border-left-width': 1,
			'margin-left': scrollbarWidths.left - 1
		});
	}
	if (scrollbarWidths.right) {
		rowEls.css({
			'border-right-width': 1,
			'margin-right': scrollbarWidths.right - 1
		});
	}
}


// Undoes compensateScroll and restores all borders/margins
function uncompensateScroll(rowEls) {
	rowEls.css({
		'margin-left': '',
		'margin-right': '',
		'border-left-width': '',
		'border-right-width': ''
	});
}


// Make the mouse cursor express that an event is not allowed in the current area
function disableCursor() {
	$('body').addClass('fc-not-allowed');
}


// Returns the mouse cursor to its original look
function enableCursor() {
	$('body').removeClass('fc-not-allowed');
}


// Given a total available height to fill, have `els` (essentially child rows) expand to accomodate.
// By default, all elements that are shorter than the recommended height are expanded uniformly, not considering
// any other els that are already too tall. if `shouldRedistribute` is on, it considers these tall rows and 
// reduces the available height.
function distributeHeight(els, availableHeight, shouldRedistribute) {

	// *FLOORING NOTE*: we floor in certain places because zoom can give inaccurate floating-point dimensions,
	// and it is better to be shorter than taller, to avoid creating unnecessary scrollbars.

	var minOffset1 = Math.floor(availableHeight / els.length); // for non-last element
	var minOffset2 = Math.floor(availableHeight - minOffset1 * (els.length - 1)); // for last element *FLOORING NOTE*
	var flexEls = []; // elements that are allowed to expand. array of DOM nodes
	var flexOffsets = []; // amount of vertical space it takes up
	var flexHeights = []; // actual css height
	var usedHeight = 0;

	undistributeHeight(els); // give all elements their natural height

	// find elements that are below the recommended height (expandable).
	// important to query for heights in a single first pass (to avoid reflow oscillation).
	els.each(function(i, el) {
		var minOffset = i === els.length - 1 ? minOffset2 : minOffset1;
		var naturalOffset = $(el).outerHeight(true);

		if (naturalOffset < minOffset) {
			flexEls.push(el);
			flexOffsets.push(naturalOffset);
			flexHeights.push($(el).height());
		}
		else {
			// this element stretches past recommended height (non-expandable). mark the space as occupied.
			usedHeight += naturalOffset;
		}
	});

	// readjust the recommended height to only consider the height available to non-maxed-out rows.
	if (shouldRedistribute) {
		availableHeight -= usedHeight;
		minOffset1 = Math.floor(availableHeight / flexEls.length);
		minOffset2 = Math.floor(availableHeight - minOffset1 * (flexEls.length - 1)); // *FLOORING NOTE*
	}

	// assign heights to all expandable elements
	$(flexEls).each(function(i, el) {
		var minOffset = i === flexEls.length - 1 ? minOffset2 : minOffset1;
		var naturalOffset = flexOffsets[i];
		var naturalHeight = flexHeights[i];
		var newHeight = minOffset - (naturalOffset - naturalHeight); // subtract the margin/padding

		if (naturalOffset < minOffset) { // we check this again because redistribution might have changed things
			$(el).height(newHeight);
		}
	});
}


// Undoes distrubuteHeight, restoring all els to their natural height
function undistributeHeight(els) {
	els.height('');
}


// Given `els`, a jQuery set of <td> cells, find the cell with the largest natural width and set the widths of all the
// cells to be that width.
// PREREQUISITE: if you want a cell to take up width, it needs to have a single inner element w/ display:inline
function matchCellWidths(els) {
	var maxInnerWidth = 0;

	els.find('> span').each(function(i, innerEl) {
		var innerWidth = $(innerEl).outerWidth();
		if (innerWidth > maxInnerWidth) {
			maxInnerWidth = innerWidth;
		}
	});

	maxInnerWidth++; // sometimes not accurate of width the text needs to stay on one line. insurance

	els.width(maxInnerWidth);

	return maxInnerWidth;
}


// Turns a container element into a scroller if its contents is taller than the allotted height.
// Returns true if the element is now a scroller, false otherwise.
// NOTE: this method is best because it takes weird zooming dimensions into account
function setPotentialScroller(containerEl, height) {
	containerEl.height(height).addClass('fc-scroller');

	// are scrollbars needed?
	if (containerEl[0].scrollHeight - 1 > containerEl[0].clientHeight) { // !!! -1 because IE is often off-by-one :(
		return true;
	}

	unsetScroller(containerEl); // undo
	return false;
}


// Takes an element that might have been a scroller, and turns it back into a normal element.
function unsetScroller(containerEl) {
	containerEl.height('').removeClass('fc-scroller');
}


/* General DOM Utilities
----------------------------------------------------------------------------------------------------------------------*/

FC.getOuterRect = getOuterRect;
FC.getClientRect = getClientRect;
FC.getContentRect = getContentRect;
FC.getScrollbarWidths = getScrollbarWidths;


// borrowed from https://github.com/jquery/jquery-ui/blob/1.11.0/ui/core.js#L51
function getScrollParent(el) {
	var position = el.css('position'),
		scrollParent = el.parents().filter(function() {
			var parent = $(this);
			return (/(auto|scroll)/).test(
				parent.css('overflow') + parent.css('overflow-y') + parent.css('overflow-x')
			);
		}).eq(0);

	return position === 'fixed' || !scrollParent.length ? $(el[0].ownerDocument || document) : scrollParent;
}


// Queries the outer bounding area of a jQuery element.
// Returns a rectangle with absolute coordinates: left, right (exclusive), top, bottom (exclusive).
function getOuterRect(el) {
	var offset = el.offset();

	return {
		left: offset.left,
		right: offset.left + el.outerWidth(),
		top: offset.top,
		bottom: offset.top + el.outerHeight()
	};
}


// Queries the area within the margin/border/scrollbars of a jQuery element. Does not go within the padding.
// Returns a rectangle with absolute coordinates: left, right (exclusive), top, bottom (exclusive).
// NOTE: should use clientLeft/clientTop, but very unreliable cross-browser.
function getClientRect(el) {
	var offset = el.offset();
	var scrollbarWidths = getScrollbarWidths(el);
	var left = offset.left + getCssFloat(el, 'border-left-width') + scrollbarWidths.left;
	var top = offset.top + getCssFloat(el, 'border-top-width') + scrollbarWidths.top;

	return {
		left: left,
		right: left + el[0].clientWidth, // clientWidth includes padding but NOT scrollbars
		top: top,
		bottom: top + el[0].clientHeight // clientHeight includes padding but NOT scrollbars
	};
}


// Queries the area within the margin/border/padding of a jQuery element. Assumed not to have scrollbars.
// Returns a rectangle with absolute coordinates: left, right (exclusive), top, bottom (exclusive).
function getContentRect(el) {
	var offset = el.offset(); // just outside of border, margin not included
	var left = offset.left + getCssFloat(el, 'border-left-width') + getCssFloat(el, 'padding-left');
	var top = offset.top + getCssFloat(el, 'border-top-width') + getCssFloat(el, 'padding-top');

	return {
		left: left,
		right: left + el.width(),
		top: top,
		bottom: top + el.height()
	};
}


// Returns the computed left/right/top/bottom scrollbar widths for the given jQuery element.
// NOTE: should use clientLeft/clientTop, but very unreliable cross-browser.
function getScrollbarWidths(el) {
	var leftRightWidth = el.innerWidth() - el[0].clientWidth; // the paddings cancel out, leaving the scrollbars
	var widths = {
		left: 0,
		right: 0,
		top: 0,
		bottom: el.innerHeight() - el[0].clientHeight // the paddings cancel out, leaving the bottom scrollbar
	};

	if (getIsLeftRtlScrollbars() && el.css('direction') == 'rtl') { // is the scrollbar on the left side?
		widths.left = leftRightWidth;
	}
	else {
		widths.right = leftRightWidth;
	}

	return widths;
}


// Logic for determining if, when the element is right-to-left, the scrollbar appears on the left side

var _isLeftRtlScrollbars = null;

function getIsLeftRtlScrollbars() { // responsible for caching the computation
	if (_isLeftRtlScrollbars === null) {
		_isLeftRtlScrollbars = computeIsLeftRtlScrollbars();
	}
	return _isLeftRtlScrollbars;
}

function computeIsLeftRtlScrollbars() { // creates an offscreen test element, then removes it
	var el = $('<div><div/></div>')
		.css({
			position: 'absolute',
			top: -1000,
			left: 0,
			border: 0,
			padding: 0,
			overflow: 'scroll',
			direction: 'rtl'
		})
		.appendTo('body');
	var innerEl = el.children();
	var res = innerEl.offset().left > el.offset().left; // is the inner div shifted to accommodate a left scrollbar?
	el.remove();
	return res;
}


// Retrieves a jQuery element's computed CSS value as a floating-point number.
// If the queried value is non-numeric (ex: IE can return "medium" for border width), will just return zero.
function getCssFloat(el, prop) {
	return parseFloat(el.css(prop)) || 0;
}


// Returns a boolean whether this was a left mouse click and no ctrl key (which means right click on Mac)
function isPrimaryMouseButton(ev) {
	return ev.which == 1 && !ev.ctrlKey;
}


/* Geometry
----------------------------------------------------------------------------------------------------------------------*/

FC.intersectRects = intersectRects;

// Returns a new rectangle that is the intersection of the two rectangles. If they don't intersect, returns false
function intersectRects(rect1, rect2) {
	var res = {
		left: Math.max(rect1.left, rect2.left),
		right: Math.min(rect1.right, rect2.right),
		top: Math.max(rect1.top, rect2.top),
		bottom: Math.min(rect1.bottom, rect2.bottom)
	};

	if (res.left < res.right && res.top < res.bottom) {
		return res;
	}
	return false;
}


// Returns a new point that will have been moved to reside within the given rectangle
function constrainPoint(point, rect) {
	return {
		left: Math.min(Math.max(point.left, rect.left), rect.right),
		top: Math.min(Math.max(point.top, rect.top), rect.bottom)
	};
}


// Returns a point that is the center of the given rectangle
function getRectCenter(rect) {
	return {
		left: (rect.left + rect.right) / 2,
		top: (rect.top + rect.bottom) / 2
	};
}


// Subtracts point2's coordinates from point1's coordinates, returning a delta
function diffPoints(point1, point2) {
	return {
		left: point1.left - point2.left,
		top: point1.top - point2.top
	};
}


/* Object Ordering by Field
----------------------------------------------------------------------------------------------------------------------*/

FC.parseFieldSpecs = parseFieldSpecs;
FC.compareByFieldSpecs = compareByFieldSpecs;
FC.compareByFieldSpec = compareByFieldSpec;
FC.flexibleCompare = flexibleCompare;


function parseFieldSpecs(input) {
	var specs = [];
	var tokens = [];
	var i, token;

	if (typeof input === 'string') {
		tokens = input.split(/\s*,\s*/);
	}
	else if (typeof input === 'function') {
		tokens = [ input ];
	}
	else if ($.isArray(input)) {
		tokens = input;
	}

	for (i = 0; i < tokens.length; i++) {
		token = tokens[i];

		if (typeof token === 'string') {
			specs.push(
				token.charAt(0) == '-' ?
					{ field: token.substring(1), order: -1 } :
					{ field: token, order: 1 }
			);
		}
		else if (typeof token === 'function') {
			specs.push({ func: token });
		}
	}

	return specs;
}


function compareByFieldSpecs(obj1, obj2, fieldSpecs) {
	var i;
	var cmp;

	for (i = 0; i < fieldSpecs.length; i++) {
		cmp = compareByFieldSpec(obj1, obj2, fieldSpecs[i]);
		if (cmp) {
			return cmp;
		}
	}

	return 0;
}


function compareByFieldSpec(obj1, obj2, fieldSpec) {
	if (fieldSpec.func) {
		return fieldSpec.func(obj1, obj2);
	}
	return flexibleCompare(obj1[fieldSpec.field], obj2[fieldSpec.field]) *
		(fieldSpec.order || 1);
}


function flexibleCompare(a, b) {
	if (!a && !b) {
		return 0;
	}
	if (b == null) {
		return -1;
	}
	if (a == null) {
		return 1;
	}
	if ($.type(a) === 'string' || $.type(b) === 'string') {
		return String(a).localeCompare(String(b));
	}
	return a - b;
}


/* FullCalendar-specific Misc Utilities
----------------------------------------------------------------------------------------------------------------------*/


// Computes the intersection of the two ranges. Returns undefined if no intersection.
// Expects all dates to be normalized to the same timezone beforehand.
// TODO: move to date section?
function intersectRanges(subjectRange, constraintRange) {
	var subjectStart = subjectRange.start;
	var subjectEnd = subjectRange.end;
	var constraintStart = constraintRange.start;
	var constraintEnd = constraintRange.end;
	var segStart, segEnd;
	var isStart, isEnd;

	if (subjectEnd > constraintStart && subjectStart < constraintEnd) { // in bounds at all?

		if (subjectStart >= constraintStart) {
			segStart = subjectStart.clone();
			isStart = true;
		}
		else {
			segStart = constraintStart.clone();
			isStart =  false;
		}

		if (subjectEnd <= constraintEnd) {
			segEnd = subjectEnd.clone();
			isEnd = true;
		}
		else {
			segEnd = constraintEnd.clone();
			isEnd = false;
		}

		return {
			start: segStart,
			end: segEnd,
			isStart: isStart,
			isEnd: isEnd
		};
	}
}


/* Date Utilities
----------------------------------------------------------------------------------------------------------------------*/

FC.computeIntervalUnit = computeIntervalUnit;
FC.divideRangeByDuration = divideRangeByDuration;
FC.divideDurationByDuration = divideDurationByDuration;
FC.multiplyDuration = multiplyDuration;
FC.durationHasTime = durationHasTime;

var dayIDs = [ 'sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat' ];
var intervalUnits = [ 'year', 'month', 'week', 'day', 'hour', 'minute', 'second', 'millisecond' ];


// Diffs the two moments into a Duration where full-days are recorded first, then the remaining time.
// Moments will have their timezones normalized.
function diffDayTime(a, b) {
	return moment.duration({
		days: a.clone().stripTime().diff(b.clone().stripTime(), 'days'),
		ms: a.time() - b.time() // time-of-day from day start. disregards timezone
	});
}


// Diffs the two moments via their start-of-day (regardless of timezone). Produces whole-day durations.
function diffDay(a, b) {
	return moment.duration({
		days: a.clone().stripTime().diff(b.clone().stripTime(), 'days')
	});
}


// Diffs two moments, producing a duration, made of a whole-unit-increment of the given unit. Uses rounding.
function diffByUnit(a, b, unit) {
	return moment.duration(
		Math.round(a.diff(b, unit, true)), // returnFloat=true
		unit
	);
}


// Computes the unit name of the largest whole-unit period of time.
// For example, 48 hours will be "days" whereas 49 hours will be "hours".
// Accepts start/end, a range object, or an original duration object.
function computeIntervalUnit(start, end) {
	var i, unit;
	var val;

	for (i = 0; i < intervalUnits.length; i++) {
		unit = intervalUnits[i];
		val = computeRangeAs(unit, start, end);

		if (val >= 1 && isInt(val)) {
			break;
		}
	}

	return unit; // will be "milliseconds" if nothing else matches
}


// Computes the number of units (like "hours") in the given range.
// Range can be a {start,end} object, separate start/end args, or a Duration.
// Results are based on Moment's .as() and .diff() methods, so results can depend on internal handling
// of month-diffing logic (which tends to vary from version to version).
function computeRangeAs(unit, start, end) {

	if (end != null) { // given start, end
		return end.diff(start, unit, true);
	}
	else if (moment.isDuration(start)) { // given duration
		return start.as(unit);
	}
	else { // given { start, end } range object
		return start.end.diff(start.start, unit, true);
	}
}


// Intelligently divides a range (specified by a start/end params) by a duration
function divideRangeByDuration(start, end, dur) {
	var months;

	if (durationHasTime(dur)) {
		return (end - start) / dur;
	}
	months = dur.asMonths();
	if (Math.abs(months) >= 1 && isInt(months)) {
		return end.diff(start, 'months', true) / months;
	}
	return end.diff(start, 'days', true) / dur.asDays();
}


// Intelligently divides one duration by another
function divideDurationByDuration(dur1, dur2) {
	var months1, months2;

	if (durationHasTime(dur1) || durationHasTime(dur2)) {
		return dur1 / dur2;
	}
	months1 = dur1.asMonths();
	months2 = dur2.asMonths();
	if (
		Math.abs(months1) >= 1 && isInt(months1) &&
		Math.abs(months2) >= 1 && isInt(months2)
	) {
		return months1 / months2;
	}
	return dur1.asDays() / dur2.asDays();
}


// Intelligently multiplies a duration by a number
function multiplyDuration(dur, n) {
	var months;

	if (durationHasTime(dur)) {
		return moment.duration(dur * n);
	}
	months = dur.asMonths();
	if (Math.abs(months) >= 1 && isInt(months)) {
		return moment.duration({ months: months * n });
	}
	return moment.duration({ days: dur.asDays() * n });
}


// Returns a boolean about whether the given duration has any time parts (hours/minutes/seconds/ms)
function durationHasTime(dur) {
	return Boolean(dur.hours() || dur.minutes() || dur.seconds() || dur.milliseconds());
}


function isNativeDate(input) {
	return  Object.prototype.toString.call(input) === '[object Date]' || input instanceof Date;
}


// Returns a boolean about whether the given input is a time string, like "06:40:00" or "06:00"
function isTimeString(str) {
	return /^\d+\:\d+(?:\:\d+\.?(?:\d{3})?)?$/.test(str);
}


/* Logging and Debug
----------------------------------------------------------------------------------------------------------------------*/

FC.log = function() {
	var console = window.console;

	if (console && console.log) {
		return console.log.apply(console, arguments);
	}
};

FC.warn = function() {
	var console = window.console;

	if (console && console.warn) {
		return console.warn.apply(console, arguments);
	}
	else {
		return FC.log.apply(FC, arguments);
	}
};


/* General Utilities
----------------------------------------------------------------------------------------------------------------------*/

var hasOwnPropMethod = {}.hasOwnProperty;


// Merges an array of objects into a single object.
// The second argument allows for an array of property names who's object values will be merged together.
function mergeProps(propObjs, complexProps) {
	var dest = {};
	var i, name;
	var complexObjs;
	var j, val;
	var props;

	if (complexProps) {
		for (i = 0; i < complexProps.length; i++) {
			name = complexProps[i];
			complexObjs = [];

			// collect the trailing object values, stopping when a non-object is discovered
			for (j = propObjs.length - 1; j >= 0; j--) {
				val = propObjs[j][name];

				if (typeof val === 'object') {
					complexObjs.unshift(val);
				}
				else if (val !== undefined) {
					dest[name] = val; // if there were no objects, this value will be used
					break;
				}
			}

			// if the trailing values were objects, use the merged value
			if (complexObjs.length) {
				dest[name] = mergeProps(complexObjs);
			}
		}
	}

	// copy values into the destination, going from last to first
	for (i = propObjs.length - 1; i >= 0; i--) {
		props = propObjs[i];

		for (name in props) {
			if (!(name in dest)) { // if already assigned by previous props or complex props, don't reassign
				dest[name] = props[name];
			}
		}
	}

	return dest;
}


// Create an object that has the given prototype. Just like Object.create
function createObject(proto) {
	var f = function() {};
	f.prototype = proto;
	return new f();
}


function copyOwnProps(src, dest) {
	for (var name in src) {
		if (hasOwnProp(src, name)) {
			dest[name] = src[name];
		}
	}
}


// Copies over certain methods with the same names as Object.prototype methods. Overcomes an IE<=8 bug:
// https://developer.mozilla.org/en-US/docs/ECMAScript_DontEnum_attribute#JScript_DontEnum_Bug
function copyNativeMethods(src, dest) {
	var names = [ 'constructor', 'toString', 'valueOf' ];
	var i, name;

	for (i = 0; i < names.length; i++) {
		name = names[i];

		if (src[name] !== Object.prototype[name]) {
			dest[name] = src[name];
		}
	}
}


function hasOwnProp(obj, name) {
	return hasOwnPropMethod.call(obj, name);
}


// Is the given value a non-object non-function value?
function isAtomic(val) {
	return /undefined|null|boolean|number|string/.test($.type(val));
}


function applyAll(functions, thisObj, args) {
	if ($.isFunction(functions)) {
		functions = [ functions ];
	}
	if (functions) {
		var i;
		var ret;
		for (i=0; i<functions.length; i++) {
			ret = functions[i].apply(thisObj, args) || ret;
		}
		return ret;
	}
}


function firstDefined() {
	for (var i=0; i<arguments.length; i++) {
		if (arguments[i] !== undefined) {
			return arguments[i];
		}
	}
}


function htmlEscape(s) {
	return (s + '').replace(/&/g, '&amp;')
		.replace(/</g, '&lt;')
		.replace(/>/g, '&gt;')
		.replace(/'/g, '&#039;')
		.replace(/"/g, '&quot;')
		.replace(/\n/g, '<br />');
}


function stripHtmlEntities(text) {
	return text.replace(/&.*?;/g, '');
}


// Given a hash of CSS properties, returns a string of CSS.
// Uses property names as-is (no camel-case conversion). Will not make statements for null/undefined values.
function cssToStr(cssProps) {
	var statements = [];

	$.each(cssProps, function(name, val) {
		if (val != null) {
			statements.push(name + ':' + val);
		}
	});

	return statements.join(';');
}


function capitaliseFirstLetter(str) {
	return str.charAt(0).toUpperCase() + str.slice(1);
}


function compareNumbers(a, b) { // for .sort()
	return a - b;
}


function isInt(n) {
	return n % 1 === 0;
}


// Returns a method bound to the given object context.
// Just like one of the jQuery.proxy signatures, but without the undesired behavior of treating the same method with
// different contexts as identical when binding/unbinding events.
function proxy(obj, methodName) {
	var method = obj[methodName];

	return function() {
		return method.apply(obj, arguments);
	};
}


// Returns a function, that, as long as it continues to be invoked, will not
// be triggered. The function will be called after it stops being called for
// N milliseconds.
// https://github.com/jashkenas/underscore/blob/1.6.0/underscore.js#L714
function debounce(func, wait) {
	var timeoutId;
	var args;
	var context;
	var timestamp; // of most recent call
	var later = function() {
		var last = +new Date() - timestamp;
		if (last < wait && last > 0) {
			timeoutId = setTimeout(later, wait - last);
		}
		else {
			timeoutId = null;
			func.apply(context, args);
			if (!timeoutId) {
				context = args = null;
			}
		}
	};

	return function() {
		context = this;
		args = arguments;
		timestamp = +new Date();
		if (!timeoutId) {
			timeoutId = setTimeout(later, wait);
		}
	};
}

;;

var ambigDateOfMonthRegex = /^\s*\d{4}-\d\d$/;
var ambigTimeOrZoneRegex =
	/^\s*\d{4}-(?:(\d\d-\d\d)|(W\d\d$)|(W\d\d-\d)|(\d\d\d))((T| )(\d\d(:\d\d(:\d\d(\.\d+)?)?)?)?)?$/;
var newMomentProto = moment.fn; // where we will attach our new methods
var oldMomentProto = $.extend({}, newMomentProto); // copy of original moment methods
var allowValueOptimization;
var setUTCValues; // function defined below
var setLocalValues; // function defined below


// Creating
// -------------------------------------------------------------------------------------------------

// Creates a new moment, similar to the vanilla moment(...) constructor, but with
// extra features (ambiguous time, enhanced formatting). When given an existing moment,
// it will function as a clone (and retain the zone of the moment). Anything else will
// result in a moment in the local zone.
FC.moment = function() {
	return makeMoment(arguments);
};

// Sames as FC.moment, but forces the resulting moment to be in the UTC timezone.
FC.moment.utc = function() {
	var mom = makeMoment(arguments, true);

	// Force it into UTC because makeMoment doesn't guarantee it
	// (if given a pre-existing moment for example)
	if (mom.hasTime()) { // don't give ambiguously-timed moments a UTC zone
		mom.utc();
	}

	return mom;
};

// Same as FC.moment, but when given an ISO8601 string, the timezone offset is preserved.
// ISO8601 strings with no timezone offset will become ambiguously zoned.
FC.moment.parseZone = function() {
	return makeMoment(arguments, true, true);
};

// Builds an enhanced moment from args. When given an existing moment, it clones. When given a
// native Date, or called with no arguments (the current time), the resulting moment will be local.
// Anything else needs to be "parsed" (a string or an array), and will be affected by:
//    parseAsUTC - if there is no zone information, should we parse the input in UTC?
//    parseZone - if there is zone information, should we force the zone of the moment?
function makeMoment(args, parseAsUTC, parseZone) {
	var input = args[0];
	var isSingleString = args.length == 1 && typeof input === 'string';
	var isAmbigTime;
	var isAmbigZone;
	var ambigMatch;
	var mom;

	if (moment.isMoment(input)) {
		mom = moment.apply(null, args); // clone it
		transferAmbigs(input, mom); // the ambig flags weren't transfered with the clone
	}
	else if (isNativeDate(input) || input === undefined) {
		mom = moment.apply(null, args); // will be local
	}
	else { // "parsing" is required
		isAmbigTime = false;
		isAmbigZone = false;

		if (isSingleString) {
			if (ambigDateOfMonthRegex.test(input)) {
				// accept strings like '2014-05', but convert to the first of the month
				input += '-01';
				args = [ input ]; // for when we pass it on to moment's constructor
				isAmbigTime = true;
				isAmbigZone = true;
			}
			else if ((ambigMatch = ambigTimeOrZoneRegex.exec(input))) {
				isAmbigTime = !ambigMatch[5]; // no time part?
				isAmbigZone = true;
			}
		}
		else if ($.isArray(input)) {
			// arrays have no timezone information, so assume ambiguous zone
			isAmbigZone = true;
		}
		// otherwise, probably a string with a format

		if (parseAsUTC || isAmbigTime) {
			mom = moment.utc.apply(moment, args);
		}
		else {
			mom = moment.apply(null, args);
		}

		if (isAmbigTime) {
			mom._ambigTime = true;
			mom._ambigZone = true; // ambiguous time always means ambiguous zone
		}
		else if (parseZone) { // let's record the inputted zone somehow
			if (isAmbigZone) {
				mom._ambigZone = true;
			}
			else if (isSingleString) {
				if (mom.utcOffset) {
					mom.utcOffset(input); // if not a valid zone, will assign UTC
				}
				else {
					mom.zone(input); // for moment-pre-2.9
				}
			}
		}
	}

	mom._fullCalendar = true; // flag for extended functionality

	return mom;
}


// A clone method that works with the flags related to our enhanced functionality.
// In the future, use moment.momentProperties
newMomentProto.clone = function() {
	var mom = oldMomentProto.clone.apply(this, arguments);

	// these flags weren't transfered with the clone
	transferAmbigs(this, mom);
	if (this._fullCalendar) {
		mom._fullCalendar = true;
	}

	return mom;
};


// Week Number
// -------------------------------------------------------------------------------------------------


// Returns the week number, considering the locale's custom week number calcuation
// `weeks` is an alias for `week`
newMomentProto.week = newMomentProto.weeks = function(input) {
	var weekCalc = (this._locale || this._lang) // works pre-moment-2.8
		._fullCalendar_weekCalc;

	if (input == null && typeof weekCalc === 'function') { // custom function only works for getter
		return weekCalc(this);
	}
	else if (weekCalc === 'ISO') {
		return oldMomentProto.isoWeek.apply(this, arguments); // ISO getter/setter
	}

	return oldMomentProto.week.apply(this, arguments); // local getter/setter
};


// Time-of-day
// -------------------------------------------------------------------------------------------------

// GETTER
// Returns a Duration with the hours/minutes/seconds/ms values of the moment.
// If the moment has an ambiguous time, a duration of 00:00 will be returned.
//
// SETTER
// You can supply a Duration, a Moment, or a Duration-like argument.
// When setting the time, and the moment has an ambiguous time, it then becomes unambiguous.
newMomentProto.time = function(time) {

	// Fallback to the original method (if there is one) if this moment wasn't created via FullCalendar.
	// `time` is a generic enough method name where this precaution is necessary to avoid collisions w/ other plugins.
	if (!this._fullCalendar) {
		return oldMomentProto.time.apply(this, arguments);
	}

	if (time == null) { // getter
		return moment.duration({
			hours: this.hours(),
			minutes: this.minutes(),
			seconds: this.seconds(),
			milliseconds: this.milliseconds()
		});
	}
	else { // setter

		this._ambigTime = false; // mark that the moment now has a time

		if (!moment.isDuration(time) && !moment.isMoment(time)) {
			time = moment.duration(time);
		}

		// The day value should cause overflow (so 24 hours becomes 00:00:00 of next day).
		// Only for Duration times, not Moment times.
		var dayHours = 0;
		if (moment.isDuration(time)) {
			dayHours = Math.floor(time.asDays()) * 24;
		}

		// We need to set the individual fields.
		// Can't use startOf('day') then add duration. In case of DST at start of day.
		return this.hours(dayHours + time.hours())
			.minutes(time.minutes())
			.seconds(time.seconds())
			.milliseconds(time.milliseconds());
	}
};

// Converts the moment to UTC, stripping out its time-of-day and timezone offset,
// but preserving its YMD. A moment with a stripped time will display no time
// nor timezone offset when .format() is called.
newMomentProto.stripTime = function() {
	var a;

	if (!this._ambigTime) {

		// get the values before any conversion happens
		a = this.toArray(); // array of y/m/d/h/m/s/ms

		// TODO: use keepLocalTime in the future
		this.utc(); // set the internal UTC flag (will clear the ambig flags)
		setUTCValues(this, a.slice(0, 3)); // set the year/month/date. time will be zero

		// Mark the time as ambiguous. This needs to happen after the .utc() call, which might call .utcOffset(),
		// which clears all ambig flags. Same with setUTCValues with moment-timezone.
		this._ambigTime = true;
		this._ambigZone = true; // if ambiguous time, also ambiguous timezone offset
	}

	return this; // for chaining
};

// Returns if the moment has a non-ambiguous time (boolean)
newMomentProto.hasTime = function() {
	return !this._ambigTime;
};


// Timezone
// -------------------------------------------------------------------------------------------------

// Converts the moment to UTC, stripping out its timezone offset, but preserving its
// YMD and time-of-day. A moment with a stripped timezone offset will display no
// timezone offset when .format() is called.
// TODO: look into Moment's keepLocalTime functionality
newMomentProto.stripZone = function() {
	var a, wasAmbigTime;

	if (!this._ambigZone) {

		// get the values before any conversion happens
		a = this.toArray(); // array of y/m/d/h/m/s/ms
		wasAmbigTime = this._ambigTime;

		this.utc(); // set the internal UTC flag (might clear the ambig flags, depending on Moment internals)
		setUTCValues(this, a); // will set the year/month/date/hours/minutes/seconds/ms

		// the above call to .utc()/.utcOffset() unfortunately might clear the ambig flags, so restore
		this._ambigTime = wasAmbigTime || false;

		// Mark the zone as ambiguous. This needs to happen after the .utc() call, which might call .utcOffset(),
		// which clears the ambig flags. Same with setUTCValues with moment-timezone.
		this._ambigZone = true;
	}

	return this; // for chaining
};

// Returns of the moment has a non-ambiguous timezone offset (boolean)
newMomentProto.hasZone = function() {
	return !this._ambigZone;
};


// this method implicitly marks a zone
newMomentProto.local = function() {
	var a = this.toArray(); // year,month,date,hours,minutes,seconds,ms as an array
	var wasAmbigZone = this._ambigZone;

	oldMomentProto.local.apply(this, arguments);

	// ensure non-ambiguous
	// this probably already happened via local() -> utcOffset(), but don't rely on Moment's internals
	this._ambigTime = false;
	this._ambigZone = false;

	if (wasAmbigZone) {
		// If the moment was ambiguously zoned, the date fields were stored as UTC.
		// We want to preserve these, but in local time.
		// TODO: look into Moment's keepLocalTime functionality
		setLocalValues(this, a);
	}

	return this; // for chaining
};


// implicitly marks a zone
newMomentProto.utc = function() {
	oldMomentProto.utc.apply(this, arguments);

	// ensure non-ambiguous
	// this probably already happened via utc() -> utcOffset(), but don't rely on Moment's internals
	this._ambigTime = false;
	this._ambigZone = false;

	return this;
};


// methods for arbitrarily manipulating timezone offset.
// should clear time/zone ambiguity when called.
$.each([
	'zone', // only in moment-pre-2.9. deprecated afterwards
	'utcOffset'
], function(i, name) {
	if (oldMomentProto[name]) { // original method exists?

		// this method implicitly marks a zone (will probably get called upon .utc() and .local())
		newMomentProto[name] = function(tzo) {

			if (tzo != null) { // setter
				// these assignments needs to happen before the original zone method is called.
				// I forget why, something to do with a browser crash.
				this._ambigTime = false;
				this._ambigZone = false;
			}

			return oldMomentProto[name].apply(this, arguments);
		};
	}
});


// Formatting
// -------------------------------------------------------------------------------------------------

newMomentProto.format = function() {
	if (this._fullCalendar && arguments[0]) { // an enhanced moment? and a format string provided?
		return formatDate(this, arguments[0]); // our extended formatting
	}
	if (this._ambigTime) {
		return oldMomentFormat(this, 'YYYY-MM-DD');
	}
	if (this._ambigZone) {
		return oldMomentFormat(this, 'YYYY-MM-DD[T]HH:mm:ss');
	}
	return oldMomentProto.format.apply(this, arguments);
};

newMomentProto.toISOString = function() {
	if (this._ambigTime) {
		return oldMomentFormat(this, 'YYYY-MM-DD');
	}
	if (this._ambigZone) {
		return oldMomentFormat(this, 'YYYY-MM-DD[T]HH:mm:ss');
	}
	return oldMomentProto.toISOString.apply(this, arguments);
};


// Querying
// -------------------------------------------------------------------------------------------------

// Is the moment within the specified range? `end` is exclusive.
// FYI, this method is not a standard Moment method, so always do our enhanced logic.
newMomentProto.isWithin = function(start, end) {
	var a = commonlyAmbiguate([ this, start, end ]);
	return a[0] >= a[1] && a[0] < a[2];
};

// When isSame is called with units, timezone ambiguity is normalized before the comparison happens.
// If no units specified, the two moments must be identically the same, with matching ambig flags.
newMomentProto.isSame = function(input, units) {
	var a;

	// only do custom logic if this is an enhanced moment
	if (!this._fullCalendar) {
		return oldMomentProto.isSame.apply(this, arguments);
	}

	if (units) {
		a = commonlyAmbiguate([ this, input ], true); // normalize timezones but don't erase times
		return oldMomentProto.isSame.call(a[0], a[1], units);
	}
	else {
		input = FC.moment.parseZone(input); // normalize input
		return oldMomentProto.isSame.call(this, input) &&
			Boolean(this._ambigTime) === Boolean(input._ambigTime) &&
			Boolean(this._ambigZone) === Boolean(input._ambigZone);
	}
};

// Make these query methods work with ambiguous moments
$.each([
	'isBefore',
	'isAfter'
], function(i, methodName) {
	newMomentProto[methodName] = function(input, units) {
		var a;

		// only do custom logic if this is an enhanced moment
		if (!this._fullCalendar) {
			return oldMomentProto[methodName].apply(this, arguments);
		}

		a = commonlyAmbiguate([ this, input ]);
		return oldMomentProto[methodName].call(a[0], a[1], units);
	};
});


// Misc Internals
// -------------------------------------------------------------------------------------------------

// given an array of moment-like inputs, return a parallel array w/ moments similarly ambiguated.
// for example, of one moment has ambig time, but not others, all moments will have their time stripped.
// set `preserveTime` to `true` to keep times, but only normalize zone ambiguity.
// returns the original moments if no modifications are necessary.
function commonlyAmbiguate(inputs, preserveTime) {
	var anyAmbigTime = false;
	var anyAmbigZone = false;
	var len = inputs.length;
	var moms = [];
	var i, mom;

	// parse inputs into real moments and query their ambig flags
	for (i = 0; i < len; i++) {
		mom = inputs[i];
		if (!moment.isMoment(mom)) {
			mom = FC.moment.parseZone(mom);
		}
		anyAmbigTime = anyAmbigTime || mom._ambigTime;
		anyAmbigZone = anyAmbigZone || mom._ambigZone;
		moms.push(mom);
	}

	// strip each moment down to lowest common ambiguity
	// use clones to avoid modifying the original moments
	for (i = 0; i < len; i++) {
		mom = moms[i];
		if (!preserveTime && anyAmbigTime && !mom._ambigTime) {
			moms[i] = mom.clone().stripTime();
		}
		else if (anyAmbigZone && !mom._ambigZone) {
			moms[i] = mom.clone().stripZone();
		}
	}

	return moms;
}

// Transfers all the flags related to ambiguous time/zone from the `src` moment to the `dest` moment
// TODO: look into moment.momentProperties for this.
function transferAmbigs(src, dest) {
	if (src._ambigTime) {
		dest._ambigTime = true;
	}
	else if (dest._ambigTime) {
		dest._ambigTime = false;
	}

	if (src._ambigZone) {
		dest._ambigZone = true;
	}
	else if (dest._ambigZone) {
		dest._ambigZone = false;
	}
}


// Sets the year/month/date/etc values of the moment from the given array.
// Inefficient because it calls each individual setter.
function setMomentValues(mom, a) {
	mom.year(a[0] || 0)
		.month(a[1] || 0)
		.date(a[2] || 0)
		.hours(a[3] || 0)
		.minutes(a[4] || 0)
		.seconds(a[5] || 0)
		.milliseconds(a[6] || 0);
}

// Can we set the moment's internal date directly?
allowValueOptimization = '_d' in moment() && 'updateOffset' in moment;

// Utility function. Accepts a moment and an array of the UTC year/month/date/etc values to set.
// Assumes the given moment is already in UTC mode.
setUTCValues = allowValueOptimization ? function(mom, a) {
	// simlate what moment's accessors do
	mom._d.setTime(Date.UTC.apply(Date, a));
	moment.updateOffset(mom, false); // keepTime=false
} : setMomentValues;

// Utility function. Accepts a moment and an array of the local year/month/date/etc values to set.
// Assumes the given moment is already in local mode.
setLocalValues = allowValueOptimization ? function(mom, a) {
	// simlate what moment's accessors do
	mom._d.setTime(+new Date( // FYI, there is now way to apply an array of args to a constructor
		a[0] || 0,
		a[1] || 0,
		a[2] || 0,
		a[3] || 0,
		a[4] || 0,
		a[5] || 0,
		a[6] || 0
	));
	moment.updateOffset(mom, false); // keepTime=false
} : setMomentValues;

;;

// Single Date Formatting
// -------------------------------------------------------------------------------------------------


// call this if you want Moment's original format method to be used
function oldMomentFormat(mom, formatStr) {
	return oldMomentProto.format.call(mom, formatStr); // oldMomentProto defined in moment-ext.js
}


// Formats `date` with a Moment formatting string, but allow our non-zero areas and
// additional token.
function formatDate(date, formatStr) {
	return formatDateWithChunks(date, getFormatStringChunks(formatStr));
}


function formatDateWithChunks(date, chunks) {
	var s = '';
	var i;

	for (i=0; i<chunks.length; i++) {
		s += formatDateWithChunk(date, chunks[i]);
	}

	return s;
}


// addition formatting tokens we want recognized
var tokenOverrides = {
	t: function(date) { // "a" or "p"
		return oldMomentFormat(date, 'a').charAt(0);
	},
	T: function(date) { // "A" or "P"
		return oldMomentFormat(date, 'A').charAt(0);
	}
};


function formatDateWithChunk(date, chunk) {
	var token;
	var maybeStr;

	if (typeof chunk === 'string') { // a literal string
		return chunk;
	}
	else if ((token = chunk.token)) { // a token, like "YYYY"
		if (tokenOverrides[token]) {
			return tokenOverrides[token](date); // use our custom token
		}
		return oldMomentFormat(date, token);
	}
	else if (chunk.maybe) { // a grouping of other chunks that must be non-zero
		maybeStr = formatDateWithChunks(date, chunk.maybe);
		if (maybeStr.match(/[1-9]/)) {
			return maybeStr;
		}
	}

	return '';
}


// Date Range Formatting
// -------------------------------------------------------------------------------------------------
// TODO: make it work with timezone offset

// Using a formatting string meant for a single date, generate a range string, like
// "Sep 2 - 9 2013", that intelligently inserts a separator where the dates differ.
// If the dates are the same as far as the format string is concerned, just return a single
// rendering of one date, without any separator.
function formatRange(date1, date2, formatStr, separator, isRTL) {
	var localeData;

	date1 = FC.moment.parseZone(date1);
	date2 = FC.moment.parseZone(date2);

	localeData = (date1.localeData || date1.lang).call(date1); // works with moment-pre-2.8

	// Expand localized format strings, like "LL" -> "MMMM D YYYY"
	formatStr = localeData.longDateFormat(formatStr) || formatStr;
	// BTW, this is not important for `formatDate` because it is impossible to put custom tokens
	// or non-zero areas in Moment's localized format strings.

	separator = separator || ' - ';

	return formatRangeWithChunks(
		date1,
		date2,
		getFormatStringChunks(formatStr),
		separator,
		isRTL
	);
}
FC.formatRange = formatRange; // expose


function formatRangeWithChunks(date1, date2, chunks, separator, isRTL) {
	var unzonedDate1 = date1.clone().stripZone(); // for formatSimilarChunk
	var unzonedDate2 = date2.clone().stripZone(); // "
	var chunkStr; // the rendering of the chunk
	var leftI;
	var leftStr = '';
	var rightI;
	var rightStr = '';
	var middleI;
	var middleStr1 = '';
	var middleStr2 = '';
	var middleStr = '';

	// Start at the leftmost side of the formatting string and continue until you hit a token
	// that is not the same between dates.
	for (leftI=0; leftI<chunks.length; leftI++) {
		chunkStr = formatSimilarChunk(date1, date2, unzonedDate1, unzonedDate2, chunks[leftI]);
		if (chunkStr === false) {
			break;
		}
		leftStr += chunkStr;
	}

	// Similarly, start at the rightmost side of the formatting string and move left
	for (rightI=chunks.length-1; rightI>leftI; rightI--) {
		chunkStr = formatSimilarChunk(date1, date2, unzonedDate1, unzonedDate2,  chunks[rightI]);
		if (chunkStr === false) {
			break;
		}
		rightStr = chunkStr + rightStr;
	}

	// The area in the middle is different for both of the dates.
	// Collect them distinctly so we can jam them together later.
	for (middleI=leftI; middleI<=rightI; middleI++) {
		middleStr1 += formatDateWithChunk(date1, chunks[middleI]);
		middleStr2 += formatDateWithChunk(date2, chunks[middleI]);
	}

	if (middleStr1 || middleStr2) {
		if (isRTL) {
			middleStr = middleStr2 + separator + middleStr1;
		}
		else {
			middleStr = middleStr1 + separator + middleStr2;
		}
	}

	return leftStr + middleStr + rightStr;
}


var similarUnitMap = {
	Y: 'year',
	M: 'month',
	D: 'day', // day of month
	d: 'day', // day of week
	// prevents a separator between anything time-related...
	A: 'second', // AM/PM
	a: 'second', // am/pm
	T: 'second', // A/P
	t: 'second', // a/p
	H: 'second', // hour (24)
	h: 'second', // hour (12)
	m: 'second', // minute
	s: 'second' // second
};
// TODO: week maybe?


// Given a formatting chunk, and given that both dates are similar in the regard the
// formatting chunk is concerned, format date1 against `chunk`. Otherwise, return `false`.
function formatSimilarChunk(date1, date2, unzonedDate1, unzonedDate2, chunk) {
	var token;
	var unit;

	if (typeof chunk === 'string') { // a literal string
		return chunk;
	}
	else if ((token = chunk.token)) {
		unit = similarUnitMap[token.charAt(0)];

		// are the dates the same for this unit of measurement?
		// use the unzoned dates for this calculation because unreliable when near DST (bug #2396)
		if (unit && unzonedDate1.isSame(unzonedDate2, unit)) {
			return oldMomentFormat(date1, token); // would be the same if we used `date2`
			// BTW, don't support custom tokens
		}
	}

	return false; // the chunk is NOT the same for the two dates
	// BTW, don't support splitting on non-zero areas
}


// Chunking Utils
// -------------------------------------------------------------------------------------------------


var formatStringChunkCache = {};


function getFormatStringChunks(formatStr) {
	if (formatStr in formatStringChunkCache) {
		return formatStringChunkCache[formatStr];
	}
	return (formatStringChunkCache[formatStr] = chunkFormatString(formatStr));
}


// Break the formatting string into an array of chunks
function chunkFormatString(formatStr) {
	var chunks = [];
	var chunker = /\[([^\]]*)\]|\(([^\)]*)\)|(LTS|LT|(\w)\4*o?)|([^\w\[\(]+)/g; // TODO: more descrimination
	var match;

	while ((match = chunker.exec(formatStr))) {
		if (match[1]) { // a literal string inside [ ... ]
			chunks.push(match[1]);
		}
		else if (match[2]) { // non-zero formatting inside ( ... )
			chunks.push({ maybe: chunkFormatString(match[2]) });
		}
		else if (match[3]) { // a formatting token
			chunks.push({ token: match[3] });
		}
		else if (match[5]) { // an unenclosed literal string
			chunks.push(match[5]);
		}
	}

	return chunks;
}

;;

FC.Class = Class; // export

// Class that all other classes will inherit from
function Class() { }


// Called on a class to create a subclass.
// Last argument contains instance methods. Any argument before the last are considered mixins.
Class.extend = function() {
	var len = arguments.length;
	var i;
	var members;

	for (i = 0; i < len; i++) {
		members = arguments[i];
		if (i < len - 1) { // not the last argument?
			mixIntoClass(this, members);
		}
	}

	return extendClass(this, members || {}); // members will be undefined if no arguments
};


// Adds new member variables/methods to the class's prototype.
// Can be called with another class, or a plain object hash containing new members.
Class.mixin = function(members) {
	mixIntoClass(this, members);
};


function extendClass(superClass, members) {
	var subClass;

	// ensure a constructor for the subclass, forwarding all arguments to the super-constructor if it doesn't exist
	if (hasOwnProp(members, 'constructor')) {
		subClass = members.constructor;
	}
	if (typeof subClass !== 'function') {
		subClass = members.constructor = function() {
			superClass.apply(this, arguments);
		};
	}

	// build the base prototype for the subclass, which is an new object chained to the superclass's prototype
	subClass.prototype = createObject(superClass.prototype);

	// copy each member variable/method onto the the subclass's prototype
	copyOwnProps(members, subClass.prototype);
	copyNativeMethods(members, subClass.prototype); // hack for IE8

	// copy over all class variables/methods to the subclass, such as `extend` and `mixin`
	copyOwnProps(superClass, subClass);

	return subClass;
}


function mixIntoClass(theClass, members) {
	copyOwnProps(members.prototype || members, theClass.prototype); // TODO: copyNativeMethods?
}
;;

var Emitter = FC.Emitter = Class.extend({

	callbackHash: null,


	on: function(name, callback) {
		this.getCallbacks(name).add(callback);
		return this; // for chaining
	},


	off: function(name, callback) {
		this.getCallbacks(name).remove(callback);
		return this; // for chaining
	},


	trigger: function(name) { // args...
		var args = Array.prototype.slice.call(arguments, 1);

		this.triggerWith(name, this, args);

		return this; // for chaining
	},


	triggerWith: function(name, context, args) {
		var callbacks = this.getCallbacks(name);

		callbacks.fireWith(context, args);

		return this; // for chaining
	},


	getCallbacks: function(name) {
		var callbacks;

		if (!this.callbackHash) {
			this.callbackHash = {};
		}

		callbacks = this.callbackHash[name];
		if (!callbacks) {
			callbacks = this.callbackHash[name] = $.Callbacks();
		}

		return callbacks;
	}

});
;;

/* A rectangular panel that is absolutely positioned over other content
------------------------------------------------------------------------------------------------------------------------
Options:
	- className (string)
	- content (HTML string or jQuery element set)
	- parentEl
	- top
	- left
	- right (the x coord of where the right edge should be. not a "CSS" right)
	- autoHide (boolean)
	- show (callback)
	- hide (callback)
*/

var Popover = Class.extend({

	isHidden: true,
	options: null,
	el: null, // the container element for the popover. generated by this object
	documentMousedownProxy: null, // document mousedown handler bound to `this`
	margin: 10, // the space required between the popover and the edges of the scroll container


	constructor: function(options) {
		this.options = options || {};
	},


	// Shows the popover on the specified position. Renders it if not already
	show: function() {
		if (this.isHidden) {
			if (!this.el) {
				this.render();
			}
			this.el.show();
			this.position();
			this.isHidden = false;
			this.trigger('show');
		}
	},


	// Hides the popover, through CSS, but does not remove it from the DOM
	hide: function() {
		if (!this.isHidden) {
			this.el.hide();
			this.isHidden = true;
			this.trigger('hide');
		}
	},


	// Creates `this.el` and renders content inside of it
	render: function() {
		var _this = this;
		var options = this.options;

		this.el = $('<div class="fc-popover"/>')
			.addClass(options.className || '')
			.css({
				// position initially to the top left to avoid creating scrollbars
				top: 0,
				left: 0
			})
			.append(options.content)
			.appendTo(options.parentEl);

		// when a click happens on anything inside with a 'fc-close' className, hide the popover
		this.el.on('click', '.fc-close', function() {
			_this.hide();
		});

		if (options.autoHide) {
			$(document).on('mousedown', this.documentMousedownProxy = proxy(this, 'documentMousedown'));
		}
	},


	// Triggered when the user clicks *anywhere* in the document, for the autoHide feature
	documentMousedown: function(ev) {
		// only hide the popover if the click happened outside the popover
		if (this.el && !$(ev.target).closest(this.el).length) {
			this.hide();
		}
	},


	// Hides and unregisters any handlers
	removeElement: function() {
		this.hide();

		if (this.el) {
			this.el.remove();
			this.el = null;
		}

		$(document).off('mousedown', this.documentMousedownProxy);
	},


	// Positions the popover optimally, using the top/left/right options
	position: function() {
		var options = this.options;
		var origin = this.el.offsetParent().offset();
		var width = this.el.outerWidth();
		var height = this.el.outerHeight();
		var windowEl = $(window);
		var viewportEl = getScrollParent(this.el);
		var viewportTop;
		var viewportLeft;
		var viewportOffset;
		var top; // the "position" (not "offset") values for the popover
		var left; //

		// compute top and left
		top = options.top || 0;
		if (options.left !== undefined) {
			left = options.left;
		}
		else if (options.right !== undefined) {
			left = options.right - width; // derive the left value from the right value
		}
		else {
			left = 0;
		}

		if (viewportEl.is(window) || viewportEl.is(document)) { // normalize getScrollParent's result
			viewportEl = windowEl;
			viewportTop = 0; // the window is always at the top left
			viewportLeft = 0; // (and .offset() won't work if called here)
		}
		else {
			viewportOffset = viewportEl.offset();
			viewportTop = viewportOffset.top;
			viewportLeft = viewportOffset.left;
		}

		// if the window is scrolled, it causes the visible area to be further down
		viewportTop += windowEl.scrollTop();
		viewportLeft += windowEl.scrollLeft();

		// constrain to the view port. if constrained by two edges, give precedence to top/left
		if (options.viewportConstrain !== false) {
			top = Math.min(top, viewportTop + viewportEl.outerHeight() - height - this.margin);
			top = Math.max(top, viewportTop + this.margin);
			left = Math.min(left, viewportLeft + viewportEl.outerWidth() - width - this.margin);
			left = Math.max(left, viewportLeft + this.margin);
		}

		this.el.css({
			top: top - origin.top,
			left: left - origin.left
		});
	},


	// Triggers a callback. Calls a function in the option hash of the same name.
	// Arguments beyond the first `name` are forwarded on.
	// TODO: better code reuse for this. Repeat code
	trigger: function(name) {
		if (this.options[name]) {
			this.options[name].apply(this, Array.prototype.slice.call(arguments, 1));
		}
	}

});

;;

/*
A cache for the left/right/top/bottom/width/height values for one or more elements.
Works with both offset (from topleft document) and position (from offsetParent).

options:
- els
- isHorizontal
- isVertical
*/
var CoordCache = FC.CoordCache = Class.extend({

	els: null, // jQuery set (assumed to be siblings)
	forcedOffsetParentEl: null, // options can override the natural offsetParent
	origin: null, // {left,top} position of offsetParent of els
	boundingRect: null, // constrain cordinates to this rectangle. {left,right,top,bottom} or null
	isHorizontal: false, // whether to query for left/right/width
	isVertical: false, // whether to query for top/bottom/height

	// arrays of coordinates (offsets from topleft of document)
	lefts: null,
	rights: null,
	tops: null,
	bottoms: null,


	constructor: function(options) {
		this.els = $(options.els);
		this.isHorizontal = options.isHorizontal;
		this.isVertical = options.isVertical;
		this.forcedOffsetParentEl = options.offsetParent ? $(options.offsetParent) : null;
	},


	// Queries the els for coordinates and stores them.
	// Call this method before using and of the get* methods below.
	build: function() {
		var offsetParentEl = this.forcedOffsetParentEl || this.els.eq(0).offsetParent();

		this.origin = offsetParentEl.offset();
		this.boundingRect = this.queryBoundingRect();

		if (this.isHorizontal) {
			this.buildElHorizontals();
		}
		if (this.isVertical) {
			this.buildElVerticals();
		}
	},


	// Destroys all internal data about coordinates, freeing memory
	clear: function() {
		this.origin = null;
		this.boundingRect = null;
		this.lefts = null;
		this.rights = null;
		this.tops = null;
		this.bottoms = null;
	},


	// Compute and return what the elements' bounding rectangle is, from the user's perspective.
	// Right now, only returns a rectangle if constrained by an overflow:scroll element.
	queryBoundingRect: function() {
		var scrollParentEl = getScrollParent(this.els.eq(0));

		if (!scrollParentEl.is(document)) {
			return getClientRect(scrollParentEl);
		}
	},


	// Populates the left/right internal coordinate arrays
	buildElHorizontals: function() {
		var lefts = [];
		var rights = [];

		this.els.each(function(i, node) {
			var el = $(node);
			var left = el.offset().left;
			var width = el.outerWidth();

			lefts.push(left);
			rights.push(left + width);
		});

		this.lefts = lefts;
		this.rights = rights;
	},


	// Populates the top/bottom internal coordinate arrays
	buildElVerticals: function() {
		var tops = [];
		var bottoms = [];

		this.els.each(function(i, node) {
			var el = $(node);
			var top = el.offset().top;
			var height = el.outerHeight();

			tops.push(top);
			bottoms.push(top + height);
		});

		this.tops = tops;
		this.bottoms = bottoms;
	},


	// Given a left offset (from document left), returns the index of the el that it horizontally intersects.
	// If no intersection is made, or outside of the boundingRect, returns undefined.
	getHorizontalIndex: function(leftOffset) {
		var boundingRect = this.boundingRect;
		var lefts = this.lefts;
		var rights = this.rights;
		var len = lefts.length;
		var i;

		if (!boundingRect || (leftOffset >= boundingRect.left && leftOffset < boundingRect.right)) {
			for (i = 0; i < len; i++) {
				if (leftOffset >= lefts[i] && leftOffset < rights[i]) {
					return i;
				}
			}
		}
	},


	// Given a top offset (from document top), returns the index of the el that it vertically intersects.
	// If no intersection is made, or outside of the boundingRect, returns undefined.
	getVerticalIndex: function(topOffset) {
		var boundingRect = this.boundingRect;
		var tops = this.tops;
		var bottoms = this.bottoms;
		var len = tops.length;
		var i;

		if (!boundingRect || (topOffset >= boundingRect.top && topOffset < boundingRect.bottom)) {
			for (i = 0; i < len; i++) {
				if (topOffset >= tops[i] && topOffset < bottoms[i]) {
					return i;
				}
			}
		}
	},


	// Gets the left offset (from document left) of the element at the given index
	getLeftOffset: function(leftIndex) {
		return this.lefts[leftIndex];
	},


	// Gets the left position (from offsetParent left) of the element at the given index
	getLeftPosition: function(leftIndex) {
		return this.lefts[leftIndex] - this.origin.left;
	},


	// Gets the right offset (from document left) of the element at the given index.
	// This value is NOT relative to the document's right edge, like the CSS concept of "right" would be.
	getRightOffset: function(leftIndex) {
		return this.rights[leftIndex];
	},


	// Gets the right position (from offsetParent left) of the element at the given index.
	// This value is NOT relative to the offsetParent's right edge, like the CSS concept of "right" would be.
	getRightPosition: function(leftIndex) {
		return this.rights[leftIndex] - this.origin.left;
	},


	// Gets the width of the element at the given index
	getWidth: function(leftIndex) {
		return this.rights[leftIndex] - this.lefts[leftIndex];
	},


	// Gets the top offset (from document top) of the element at the given index
	getTopOffset: function(topIndex) {
		return this.tops[topIndex];
	},


	// Gets the top position (from offsetParent top) of the element at the given position
	getTopPosition: function(topIndex) {
		return this.tops[topIndex] - this.origin.top;
	},

	// Gets the bottom offset (from the document top) of the element at the given index.
	// This value is NOT relative to the offsetParent's bottom edge, like the CSS concept of "bottom" would be.
	getBottomOffset: function(topIndex) {
		return this.bottoms[topIndex];
	},


	// Gets the bottom position (from the offsetParent top) of the element at the given index.
	// This value is NOT relative to the offsetParent's bottom edge, like the CSS concept of "bottom" would be.
	getBottomPosition: function(topIndex) {
		return this.bottoms[topIndex] - this.origin.top;
	},


	// Gets the height of the element at the given index
	getHeight: function(topIndex) {
		return this.bottoms[topIndex] - this.tops[topIndex];
	}

});

;;

/* Tracks a drag's mouse movement, firing various handlers
----------------------------------------------------------------------------------------------------------------------*/
// TODO: use Emitter

var DragListener = FC.DragListener = Class.extend({

	options: null,

	isListening: false,
	isDragging: false,

	// coordinates of the initial mousedown
	originX: null,
	originY: null,

	// handler attached to the document, bound to the DragListener's `this`
	mousemoveProxy: null,
	mouseupProxy: null,

	// for IE8 bug-fighting behavior, for now
	subjectEl: null, // the element being draged. optional
	subjectHref: null,

	scrollEl: null,
	scrollBounds: null, // { top, bottom, left, right }
	scrollTopVel: null, // pixels per second
	scrollLeftVel: null, // pixels per second
	scrollIntervalId: null, // ID of setTimeout for scrolling animation loop
	scrollHandlerProxy: null, // this-scoped function for handling when scrollEl is scrolled

	scrollSensitivity: 30, // pixels from edge for scrolling to start
	scrollSpeed: 200, // pixels per second, at maximum speed
	scrollIntervalMs: 50, // millisecond wait between scroll increment


	constructor: function(options) {
		options = options || {};
		this.options = options;
		this.subjectEl = options.subjectEl;
	},


	// Call this when the user does a mousedown. Will probably lead to startListening
	mousedown: function(ev) {
		if (isPrimaryMouseButton(ev)) {

			ev.preventDefault(); // prevents native selection in most browsers

			this.startListening(ev);

			// start the drag immediately if there is no minimum distance for a drag start
			if (!this.options.distance) {
				this.startDrag(ev);
			}
		}
	},


	// Call this to start tracking mouse movements
	startListening: function(ev) {
		var scrollParent;

		if (!this.isListening) {

			// grab scroll container and attach handler
			if (ev && this.options.scroll) {
				scrollParent = getScrollParent($(ev.target));
				if (!scrollParent.is(window) && !scrollParent.is(document)) {
					this.scrollEl = scrollParent;

					// scope to `this`, and use `debounce` to make sure rapid calls don't happen
					this.scrollHandlerProxy = debounce(proxy(this, 'scrollHandler'), 100);
					this.scrollEl.on('scroll', this.scrollHandlerProxy);
				}
			}

			$(document)
				.on('mousemove', this.mousemoveProxy = proxy(this, 'mousemove'))
				.on('mouseup', this.mouseupProxy = proxy(this, 'mouseup'))
				.on('selectstart', this.preventDefault); // prevents native selection in IE<=8

			if (ev) {
				this.originX = ev.pageX;
				this.originY = ev.pageY;
			}
			else {
				// if no starting information was given, origin will be the topleft corner of the screen.
				// if so, dx/dy in the future will be the absolute coordinates.
				this.originX = 0;
				this.originY = 0;
			}

			this.isListening = true;
			this.listenStart(ev);
		}
	},


	// Called when drag listening has started (but a real drag has not necessarily began)
	listenStart: function(ev) {
		this.trigger('listenStart', ev);
	},


	// Called when the user moves the mouse
	mousemove: function(ev) {
		var dx = ev.pageX - this.originX;
		var dy = ev.pageY - this.originY;
		var minDistance;
		var distanceSq; // current distance from the origin, squared

		if (!this.isDragging) { // if not already dragging...
			// then start the drag if the minimum distance criteria is met
			minDistance = this.options.distance || 1;
			distanceSq = dx * dx + dy * dy;
			if (distanceSq >= minDistance * minDistance) { // use pythagorean theorem
				this.startDrag(ev);
			}
		}

		if (this.isDragging) {
			this.drag(dx, dy, ev); // report a drag, even if this mousemove initiated the drag
		}
	},


	// Call this to initiate a legitimate drag.
	// This function is called internally from this class, but can also be called explicitly from outside
	startDrag: function(ev) {

		if (!this.isListening) { // startDrag must have manually initiated
			this.startListening();
		}

		if (!this.isDragging) {
			this.isDragging = true;
			this.dragStart(ev);
		}
	},


	// Called when the actual drag has started (went beyond minDistance)
	dragStart: function(ev) {
		var subjectEl = this.subjectEl;

		this.trigger('dragStart', ev);

		// remove a mousedown'd <a>'s href so it is not visited (IE8 bug)
		if ((this.subjectHref = subjectEl ? subjectEl.attr('href') : null)) {
			subjectEl.removeAttr('href');
		}
	},


	// Called while the mouse is being moved and when we know a legitimate drag is taking place
	drag: function(dx, dy, ev) {
		this.trigger('drag', dx, dy, ev);
		this.updateScroll(ev); // will possibly cause scrolling
	},


	// Called when the user does a mouseup
	mouseup: function(ev) {
		this.stopListening(ev);
	},


	// Called when the drag is over. Will not cause listening to stop however.
	// A concluding 'cellOut' event will NOT be triggered.
	stopDrag: function(ev) {
		if (this.isDragging) {
			this.stopScrolling();
			this.dragStop(ev);
			this.isDragging = false;
		}
	},


	// Called when dragging has been stopped
	dragStop: function(ev) {
		var _this = this;

		this.trigger('dragStop', ev);

		// restore a mousedown'd <a>'s href (for IE8 bug)
		setTimeout(function() { // must be outside of the click's execution
			if (_this.subjectHref) {
				_this.subjectEl.attr('href', _this.subjectHref);
			}
		}, 0);
	},


	// Call this to stop listening to the user's mouse events
	stopListening: function(ev) {
		this.stopDrag(ev); // if there's a current drag, kill it

		if (this.isListening) {

			// remove the scroll handler if there is a scrollEl
			if (this.scrollEl) {
				this.scrollEl.off('scroll', this.scrollHandlerProxy);
				this.scrollHandlerProxy = null;
			}

			$(document)
				.off('mousemove', this.mousemoveProxy)
				.off('mouseup', this.mouseupProxy)
				.off('selectstart', this.preventDefault);

			this.mousemoveProxy = null;
			this.mouseupProxy = null;

			this.isListening = false;
			this.listenStop(ev);
		}
	},


	// Called when drag listening has stopped
	listenStop: function(ev) {
		this.trigger('listenStop', ev);
	},


	// Triggers a callback. Calls a function in the option hash of the same name.
	// Arguments beyond the first `name` are forwarded on.
	trigger: function(name) {
		if (this.options[name]) {
			this.options[name].apply(this, Array.prototype.slice.call(arguments, 1));
		}
	},


	// Stops a given mouse event from doing it's native browser action. In our case, text selection.
	preventDefault: function(ev) {
		ev.preventDefault();
	},


	/* Scrolling
	------------------------------------------------------------------------------------------------------------------*/


	// Computes and stores the bounding rectangle of scrollEl
	computeScrollBounds: function() {
		var el = this.scrollEl;

		this.scrollBounds = el ? getOuterRect(el) : null;
			// TODO: use getClientRect in future. but prevents auto scrolling when on top of scrollbars
	},


	// Called when the dragging is in progress and scrolling should be updated
	updateScroll: function(ev) {
		var sensitivity = this.scrollSensitivity;
		var bounds = this.scrollBounds;
		var topCloseness, bottomCloseness;
		var leftCloseness, rightCloseness;
		var topVel = 0;
		var leftVel = 0;

		if (bounds) { // only scroll if scrollEl exists

			// compute closeness to edges. valid range is from 0.0 - 1.0
			topCloseness = (sensitivity - (ev.pageY - bounds.top)) / sensitivity;
			bottomCloseness = (sensitivity - (bounds.bottom - ev.pageY)) / sensitivity;
			leftCloseness = (sensitivity - (ev.pageX - bounds.left)) / sensitivity;
			rightCloseness = (sensitivity - (bounds.right - ev.pageX)) / sensitivity;

			// translate vertical closeness into velocity.
			// mouse must be completely in bounds for velocity to happen.
			if (topCloseness >= 0 && topCloseness <= 1) {
				topVel = topCloseness * this.scrollSpeed * -1; // negative. for scrolling up
			}
			else if (bottomCloseness >= 0 && bottomCloseness <= 1) {
				topVel = bottomCloseness * this.scrollSpeed;
			}

			// translate horizontal closeness into velocity
			if (leftCloseness >= 0 && leftCloseness <= 1) {
				leftVel = leftCloseness * this.scrollSpeed * -1; // negative. for scrolling left
			}
			else if (rightCloseness >= 0 && rightCloseness <= 1) {
				leftVel = rightCloseness * this.scrollSpeed;
			}
		}

		this.setScrollVel(topVel, leftVel);
	},


	// Sets the speed-of-scrolling for the scrollEl
	setScrollVel: function(topVel, leftVel) {

		this.scrollTopVel = topVel;
		this.scrollLeftVel = leftVel;

		this.constrainScrollVel(); // massages into realistic values

		// if there is non-zero velocity, and an animation loop hasn't already started, then START
		if ((this.scrollTopVel || this.scrollLeftVel) && !this.scrollIntervalId) {
			this.scrollIntervalId = setInterval(
				proxy(this, 'scrollIntervalFunc'), // scope to `this`
				this.scrollIntervalMs
			);
		}
	},


	// Forces scrollTopVel and scrollLeftVel to be zero if scrolling has already gone all the way
	constrainScrollVel: function() {
		var el = this.scrollEl;

		if (this.scrollTopVel < 0) { // scrolling up?
			if (el.scrollTop() <= 0) { // already scrolled all the way up?
				this.scrollTopVel = 0;
			}
		}
		else if (this.scrollTopVel > 0) { // scrolling down?
			if (el.scrollTop() + el[0].clientHeight >= el[0].scrollHeight) { // already scrolled all the way down?
				this.scrollTopVel = 0;
			}
		}

		if (this.scrollLeftVel < 0) { // scrolling left?
			if (el.scrollLeft() <= 0) { // already scrolled all the left?
				this.scrollLeftVel = 0;
			}
		}
		else if (this.scrollLeftVel > 0) { // scrolling right?
			if (el.scrollLeft() + el[0].clientWidth >= el[0].scrollWidth) { // already scrolled all the way right?
				this.scrollLeftVel = 0;
			}
		}
	},


	// This function gets called during every iteration of the scrolling animation loop
	scrollIntervalFunc: function() {
		var el = this.scrollEl;
		var frac = this.scrollIntervalMs / 1000; // considering animation frequency, what the vel should be mult'd by

		// change the value of scrollEl's scroll
		if (this.scrollTopVel) {
			el.scrollTop(el.scrollTop() + this.scrollTopVel * frac);
		}
		if (this.scrollLeftVel) {
			el.scrollLeft(el.scrollLeft() + this.scrollLeftVel * frac);
		}

		this.constrainScrollVel(); // since the scroll values changed, recompute the velocities

		// if scrolled all the way, which causes the vels to be zero, stop the animation loop
		if (!this.scrollTopVel && !this.scrollLeftVel) {
			this.stopScrolling();
		}
	},


	// Kills any existing scrolling animation loop
	stopScrolling: function() {
		if (this.scrollIntervalId) {
			clearInterval(this.scrollIntervalId);
			this.scrollIntervalId = null;

			// when all done with scrolling, recompute positions since they probably changed
			this.scrollStop();
		}
	},


	// Get called when the scrollEl is scrolled (NOTE: this is delayed via debounce)
	scrollHandler: function() {
		// recompute all coordinates, but *only* if this is *not* part of our scrolling animation
		if (!this.scrollIntervalId) {
			this.scrollStop();
		}
	},


	// Called when scrolling has stopped, whether through auto scroll, or the user scrolling
	scrollStop: function() {
	}

});

;;

/* Tracks mouse movements over a component and raises events about which hit the mouse is over.
------------------------------------------------------------------------------------------------------------------------
options:
- subjectEl
- subjectCenter
*/

var HitDragListener = DragListener.extend({

	component: null, // converts coordinates to hits
		// methods: prepareHits, releaseHits, queryHit

	origHit: null, // the hit the mouse was over when listening started
	hit: null, // the hit the mouse is over
	coordAdjust: null, // delta that will be added to the mouse coordinates when computing collisions


	constructor: function(component, options) {
		DragListener.call(this, options); // call the super-constructor

		this.component = component;
	},


	// Called when drag listening starts (but a real drag has not necessarily began).
	// ev might be undefined if dragging was started manually.
	listenStart: function(ev) {
		var subjectEl = this.subjectEl;
		var subjectRect;
		var origPoint;
		var point;

		DragListener.prototype.listenStart.apply(this, arguments); // call the super-method

		this.computeCoords();

		if (ev) {
			origPoint = { left: ev.pageX, top: ev.pageY };
			point = origPoint;

			// constrain the point to bounds of the element being dragged
			if (subjectEl) {
				subjectRect = getOuterRect(subjectEl); // used for centering as well
				point = constrainPoint(point, subjectRect);
			}

			this.origHit = this.queryHit(point.left, point.top);

			// treat the center of the subject as the collision point?
			if (subjectEl && this.options.subjectCenter) {

				// only consider the area the subject overlaps the hit. best for large subjects.
				// TODO: skip this if hit didn't supply left/right/top/bottom
				if (this.origHit) {
					subjectRect = intersectRects(this.origHit, subjectRect) ||
						subjectRect; // in case there is no intersection
				}

				point = getRectCenter(subjectRect);
			}

			this.coordAdjust = diffPoints(point, origPoint); // point - origPoint
		}
		else {
			this.origHit = null;
			this.coordAdjust = null;
		}
	},


	// Recomputes the drag-critical positions of elements
	computeCoords: function() {
		this.component.prepareHits();
		this.computeScrollBounds(); // why is this here???
	},


	// Called when the actual drag has started
	dragStart: function(ev) {
		var hit;

		DragListener.prototype.dragStart.apply(this, arguments); // call the super-method

		// might be different from this.origHit if the min-distance is large
		hit = this.queryHit(ev.pageX, ev.pageY);

		// report the initial hit the mouse is over
		// especially important if no min-distance and drag starts immediately
		if (hit) {
			this.hitOver(hit);
		}
	},


	// Called when the drag moves
	drag: function(dx, dy, ev) {
		var hit;

		DragListener.prototype.drag.apply(this, arguments); // call the super-method

		hit = this.queryHit(ev.pageX, ev.pageY);

		if (!isHitsEqual(hit, this.hit)) { // a different hit than before?
			if (this.hit) {
				this.hitOut();
			}
			if (hit) {
				this.hitOver(hit);
			}
		}
	},


	// Called when dragging has been stopped
	dragStop: function() {
		this.hitDone();
		DragListener.prototype.dragStop.apply(this, arguments); // call the super-method
	},


	// Called when a the mouse has just moved over a new hit
	hitOver: function(hit) {
		var isOrig = isHitsEqual(hit, this.origHit);

		this.hit = hit;

		this.trigger('hitOver', this.hit, isOrig, this.origHit);
	},


	// Called when the mouse has just moved out of a hit
	hitOut: function() {
		if (this.hit) {
			this.trigger('hitOut', this.hit);
			this.hitDone();
			this.hit = null;
		}
	},


	// Called after a hitOut. Also called before a dragStop
	hitDone: function() {
		if (this.hit) {
			this.trigger('hitDone', this.hit);
		}
	},


	// Called when drag listening has stopped
	listenStop: function() {
		DragListener.prototype.listenStop.apply(this, arguments); // call the super-method

		this.origHit = null;
		this.hit = null;

		this.component.releaseHits();
	},


	// Called when scrolling has stopped, whether through auto scroll, or the user scrolling
	scrollStop: function() {
		DragListener.prototype.scrollStop.apply(this, arguments); // call the super-method

		this.computeCoords(); // hits' absolute positions will be in new places. recompute
	},


	// Gets the hit underneath the coordinates for the given mouse event
	queryHit: function(left, top) {

		if (this.coordAdjust) {
			left += this.coordAdjust.left;
			top += this.coordAdjust.top;
		}

		return this.component.queryHit(left, top);
	}

});


// Returns `true` if the hits are identically equal. `false` otherwise. Must be from the same component.
// Two null values will be considered equal, as two "out of the component" states are the same.
function isHitsEqual(hit0, hit1) {

	if (!hit0 && !hit1) {
		return true;
	}

	if (hit0 && hit1) {
		return hit0.component === hit1.component &&
			isHitPropsWithin(hit0, hit1) &&
			isHitPropsWithin(hit1, hit0); // ensures all props are identical
	}

	return false;
}


// Returns true if all of subHit's non-standard properties are within superHit
function isHitPropsWithin(subHit, superHit) {
	for (var propName in subHit) {
		if (!/^(component|left|right|top|bottom)$/.test(propName)) {
			if (subHit[propName] !== superHit[propName]) {
				return false;
			}
		}
	}
	return true;
}

;;

/* Creates a clone of an element and lets it track the mouse as it moves
----------------------------------------------------------------------------------------------------------------------*/

var MouseFollower = Class.extend({

	options: null,

	sourceEl: null, // the element that will be cloned and made to look like it is dragging
	el: null, // the clone of `sourceEl` that will track the mouse
	parentEl: null, // the element that `el` (the clone) will be attached to

	// the initial position of el, relative to the offset parent. made to match the initial offset of sourceEl
	top0: null,
	left0: null,

	// the initial position of the mouse
	mouseY0: null,
	mouseX0: null,

	// the number of pixels the mouse has moved from its initial position
	topDelta: null,
	leftDelta: null,

	mousemoveProxy: null, // document mousemove handler, bound to the MouseFollower's `this`

	isFollowing: false,
	isHidden: false,
	isAnimating: false, // doing the revert animation?

	constructor: function(sourceEl, options) {
		this.options = options = options || {};
		this.sourceEl = sourceEl;
		this.parentEl = options.parentEl ? $(options.parentEl) : sourceEl.parent(); // default to sourceEl's parent
	},


	// Causes the element to start following the mouse
	start: function(ev) {
		if (!this.isFollowing) {
			this.isFollowing = true;

			this.mouseY0 = ev.pageY;
			this.mouseX0 = ev.pageX;
			this.topDelta = 0;
			this.leftDelta = 0;

			if (!this.isHidden) {
				this.updatePosition();
			}

			$(document).on('mousemove', this.mousemoveProxy = proxy(this, 'mousemove'));
		}
	},


	// Causes the element to stop following the mouse. If shouldRevert is true, will animate back to original position.
	// `callback` gets invoked when the animation is complete. If no animation, it is invoked immediately.
	stop: function(shouldRevert, callback) {
		var _this = this;
		var revertDuration = this.options.revertDuration;

		function complete() {
			this.isAnimating = false;
			_this.removeElement();

			this.top0 = this.left0 = null; // reset state for future updatePosition calls

			if (callback) {
				callback();
			}
		}

		if (this.isFollowing && !this.isAnimating) { // disallow more than one stop animation at a time
			this.isFollowing = false;

			$(document).off('mousemove', this.mousemoveProxy);

			if (shouldRevert && revertDuration && !this.isHidden) { // do a revert animation?
				this.isAnimating = true;
				this.el.animate({
					top: this.top0,
					left: this.left0
				}, {
					duration: revertDuration,
					complete: complete
				});
			}
			else {
				complete();
			}
		}
	},


	// Gets the tracking element. Create it if necessary
	getEl: function() {
		var el = this.el;

		if (!el) {
			this.sourceEl.width(); // hack to force IE8 to compute correct bounding box
			el = this.el = this.sourceEl.clone()
				.css({
					position: 'absolute',
					visibility: '', // in case original element was hidden (commonly through hideEvents())
					display: this.isHidden ? 'none' : '', // for when initially hidden
					margin: 0,
					right: 'auto', // erase and set width instead
					bottom: 'auto', // erase and set height instead
					width: this.sourceEl.width(), // explicit height in case there was a 'right' value
					height: this.sourceEl.height(), // explicit width in case there was a 'bottom' value
					opacity: this.options.opacity || '',
					zIndex: this.options.zIndex
				})
				.appendTo(this.parentEl);
		}

		return el;
	},


	// Removes the tracking element if it has already been created
	removeElement: function() {
		if (this.el) {
			this.el.remove();
			this.el = null;
		}
	},


	// Update the CSS position of the tracking element
	updatePosition: function() {
		var sourceOffset;
		var origin;

		this.getEl(); // ensure this.el

		// make sure origin info was computed
		if (this.top0 === null) {
			this.sourceEl.width(); // hack to force IE8 to compute correct bounding box
			sourceOffset = this.sourceEl.offset();
			origin = this.el.offsetParent().offset();
			this.top0 = sourceOffset.top - origin.top;
			this.left0 = sourceOffset.left - origin.left;
		}

		this.el.css({
			top: this.top0 + this.topDelta,
			left: this.left0 + this.leftDelta
		});
	},


	// Gets called when the user moves the mouse
	mousemove: function(ev) {
		this.topDelta = ev.pageY - this.mouseY0;
		this.leftDelta = ev.pageX - this.mouseX0;

		if (!this.isHidden) {
			this.updatePosition();
		}
	},


	// Temporarily makes the tracking element invisible. Can be called before following starts
	hide: function() {
		if (!this.isHidden) {
			this.isHidden = true;
			if (this.el) {
				this.el.hide();
			}
		}
	},


	// Show the tracking element after it has been temporarily hidden
	show: function() {
		if (this.isHidden) {
			this.isHidden = false;
			this.updatePosition();
			this.getEl().show();
		}
	}

});

;;

/* An abstract class comprised of a "grid" of areas that each represent a specific datetime
----------------------------------------------------------------------------------------------------------------------*/

var Grid = FC.Grid = Class.extend({

	view: null, // a View object
	isRTL: null, // shortcut to the view's isRTL option

	start: null,
	end: null,

	el: null, // the containing element
	elsByFill: null, // a hash of jQuery element sets used for rendering each fill. Keyed by fill name.

	externalDragStartProxy: null, // binds the Grid's scope to externalDragStart (in DayGrid.events)

	// derived from options
	eventTimeFormat: null,
	displayEventTime: null,
	displayEventEnd: null,

	minResizeDuration: null, // TODO: hack. set by subclasses. minumum event resize duration

	// if defined, holds the unit identified (ex: "year" or "month") that determines the level of granularity
	// of the date areas. if not defined, assumes to be day and time granularity.
	// TODO: port isTimeScale into same system?
	largeUnit: null,


	constructor: function(view) {
		this.view = view;
		this.isRTL = view.opt('isRTL');

		this.elsByFill = {};
		this.externalDragStartProxy = proxy(this, 'externalDragStart');
	},


	/* Options
	------------------------------------------------------------------------------------------------------------------*/


	// Generates the format string used for event time text, if not explicitly defined by 'timeFormat'
	computeEventTimeFormat: function() {
		return this.view.opt('smallTimeFormat');
	},


	// Determines whether events should have their end times displayed, if not explicitly defined by 'displayEventTime'.
	// Only applies to non-all-day events.
	computeDisplayEventTime: function() {
		return true;
	},


	// Determines whether events should have their end times displayed, if not explicitly defined by 'displayEventEnd'
	computeDisplayEventEnd: function() {
		return true;
	},


	/* Dates
	------------------------------------------------------------------------------------------------------------------*/


	// Tells the grid about what period of time to display.
	// Any date-related internal data should be generated.
	setRange: function(range) {
		this.start = range.start.clone();
		this.end = range.end.clone();

		this.rangeUpdated();
		this.processRangeOptions();
	},


	// Called when internal variables that rely on the range should be updated
	rangeUpdated: function() {
	},


	// Updates values that rely on options and also relate to range
	processRangeOptions: function() {
		var view = this.view;
		var displayEventTime;
		var displayEventEnd;

		this.eventTimeFormat =
			view.opt('eventTimeFormat') ||
			view.opt('timeFormat') || // deprecated
			this.computeEventTimeFormat();

		displayEventTime = view.opt('displayEventTime');
		if (displayEventTime == null) {
			displayEventTime = this.computeDisplayEventTime(); // might be based off of range
		}

		displayEventEnd = view.opt('displayEventEnd');
		if (displayEventEnd == null) {
			displayEventEnd = this.computeDisplayEventEnd(); // might be based off of range
		}

		this.displayEventTime = displayEventTime;
		this.displayEventEnd = displayEventEnd;
	},


	// Converts a span (has unzoned start/end and any other grid-specific location information)
	// into an array of segments (pieces of events whose format is decided by the grid).
	spanToSegs: function(span) {
		// subclasses must implement
	},


	// Diffs the two dates, returning a duration, based on granularity of the grid
	// TODO: port isTimeScale into this system?
	diffDates: function(a, b) {
		if (this.largeUnit) {
			return diffByUnit(a, b, this.largeUnit);
		}
		else {
			return diffDayTime(a, b);
		}
	},


	/* Hit Area
	------------------------------------------------------------------------------------------------------------------*/


	// Called before one or more queryHit calls might happen. Should prepare any cached coordinates for queryHit
	prepareHits: function() {
	},


	// Called when queryHit calls have subsided. Good place to clear any coordinate caches.
	releaseHits: function() {
	},


	// Given coordinates from the topleft of the document, return data about the date-related area underneath.
	// Can return an object with arbitrary properties (although top/right/left/bottom are encouraged).
	// Must have a `grid` property, a reference to this current grid. TODO: avoid this
	// The returned object will be processed by getHitSpan and getHitEl.
	queryHit: function(leftOffset, topOffset) {
	},


	// Given position-level information about a date-related area within the grid,
	// should return an object with at least a start/end date. Can provide other information as well.
	getHitSpan: function(hit) {
	},


	// Given position-level information about a date-related area within the grid,
	// should return a jQuery element that best represents it. passed to dayClick callback.
	getHitEl: function(hit) {
	},


	/* Rendering
	------------------------------------------------------------------------------------------------------------------*/


	// Sets the container element that the grid should render inside of.
	// Does other DOM-related initializations.
	setElement: function(el) {
		var _this = this;

		this.el = el;

		// attach a handler to the grid's root element.
		// jQuery will take care of unregistering them when removeElement gets called.
		el.on('mousedown', function(ev) {
			if (
				!$(ev.target).is('.fc-event-container *, .fc-more') && // not an an event element, or "more.." link
				!$(ev.target).closest('.fc-popover').length // not on a popover (like the "more.." events one)
			) {
				_this.dayMousedown(ev);
			}
		});

		// attach event-element-related handlers. in Grid.events
		// same garbage collection note as above.
		this.bindSegHandlers();

		this.bindGlobalHandlers();
	},


	// Removes the grid's container element from the DOM. Undoes any other DOM-related attachments.
	// DOES NOT remove any content beforehand (doesn't clear events or call unrenderDates), unlike View
	removeElement: function() {
		this.unbindGlobalHandlers();

		this.el.remove();

		// NOTE: we don't null-out this.el for the same reasons we don't do it within View::removeElement
	},


	// Renders the basic structure of grid view before any content is rendered
	renderSkeleton: function() {
		// subclasses should implement
	},


	// Renders the grid's date-related content (like areas that represent days/times).
	// Assumes setRange has already been called and the skeleton has already been rendered.
	renderDates: function() {
		// subclasses should implement
	},


	// Unrenders the grid's date-related content
	unrenderDates: function() {
		// subclasses should implement
	},


	/* Handlers
	------------------------------------------------------------------------------------------------------------------*/


	// Binds DOM handlers to elements that reside outside the grid, such as the document
	bindGlobalHandlers: function() {
		$(document).on('dragstart sortstart', this.externalDragStartProxy); // jqui
	},


	// Unbinds DOM handlers from elements that reside outside the grid
	unbindGlobalHandlers: function() {
		$(document).off('dragstart sortstart', this.externalDragStartProxy); // jqui
	},


	// Process a mousedown on an element that represents a day. For day clicking and selecting.
	dayMousedown: function(ev) {
		var _this = this;
		var view = this.view;
		var isSelectable = view.opt('selectable');
		var dayClickHit; // null if invalid dayClick
		var selectionSpan; // null if invalid selection

		// this listener tracks a mousedown on a day element, and a subsequent drag.
		// if the drag ends on the same day, it is a 'dayClick'.
		// if 'selectable' is enabled, this listener also detects selections.
		var dragListener = new HitDragListener(this, {
			//distance: 5, // needs more work if we want dayClick to fire correctly
			scroll: view.opt('dragScroll'),
			dragStart: function() {
				view.unselect(); // since we could be rendering a new selection, we want to clear any old one
			},
			hitOver: function(hit, isOrig, origHit) {
				if (origHit) { // click needs to have started on a hit
					dayClickHit = isOrig ? hit : null; // single-hit selection is a day click
					if (isSelectable) {
						selectionSpan = _this.computeSelection(
							_this.getHitSpan(origHit),
							_this.getHitSpan(hit)
						);
						if (selectionSpan) {
							_this.renderSelection(selectionSpan);
						}
						else if (selectionSpan === false) {
							disableCursor();
						}
					}
				}
			},
			hitOut: function() {
				dayClickHit = null;
				selectionSpan = null;
				_this.unrenderSelection();
				enableCursor();
			},
			listenStop: function(ev) {
				if (dayClickHit) {
					view.triggerDayClick(
						_this.getHitSpan(dayClickHit),
						_this.getHitEl(dayClickHit),
						ev
					);
				}
				if (selectionSpan) {
					// the selection will already have been rendered. just report it
					view.reportSelection(selectionSpan, ev);
				}
				enableCursor();
			}
		});

		dragListener.mousedown(ev); // start listening, which will eventually initiate a dragStart
	},


	/* Event Helper
	------------------------------------------------------------------------------------------------------------------*/
	// TODO: should probably move this to Grid.events, like we did event dragging / resizing


	// Renders a mock event at the given event location, which contains zoned start/end properties.
	renderEventLocationHelper: function(eventLocation, sourceSeg) {
		var fakeEvent = this.fabricateHelperEvent(eventLocation, sourceSeg);

		this.renderHelper(fakeEvent, sourceSeg); // do the actual rendering
	},


	// Builds a fake event given zoned event date properties and a segment is should be inspired from.
	// The range's end can be null, in which case the mock event that is rendered will have a null end time.
	// `sourceSeg` is the internal segment object involved in the drag. If null, something external is dragging.
	fabricateHelperEvent: function(eventLocation, sourceSeg) {
		var fakeEvent = sourceSeg ? createObject(sourceSeg.event) : {}; // mask the original event object if possible

		fakeEvent.start = eventLocation.start.clone();
		fakeEvent.end = eventLocation.end ? eventLocation.end.clone() : null;
		fakeEvent.allDay = null; // force it to be freshly computed by normalizeEventDates
		this.view.calendar.normalizeEventDates(fakeEvent);

		// this extra className will be useful for differentiating real events from mock events in CSS
		fakeEvent.className = (fakeEvent.className || []).concat('fc-helper');

		// if something external is being dragged in, don't render a resizer
		if (!sourceSeg) {
			fakeEvent.editable = false;
		}

		return fakeEvent;
	},


	// Renders a mock event. Given zoned event date properties.
	renderHelper: function(eventLocation, sourceSeg) {
		// subclasses must implement
	},


	// Unrenders a mock event
	unrenderHelper: function() {
		// subclasses must implement
	},


	/* Selection
	------------------------------------------------------------------------------------------------------------------*/


	// Renders a visual indication of a selection. Will highlight by default but can be overridden by subclasses.
	// Given a span (unzoned start/end and other misc data)
	renderSelection: function(span) {
		this.renderHighlight(span);
	},


	// Unrenders any visual indications of a selection. Will unrender a highlight by default.
	unrenderSelection: function() {
		this.unrenderHighlight();
	},


	// Given the first and last date-spans of a selection, returns another date-span object.
	// Subclasses can override and provide additional data in the span object. Will be passed to renderSelection().
	// Will return false if the selection is invalid and this should be indicated to the user.
	// Will return null/undefined if a selection invalid but no error should be reported.
	computeSelection: function(span0, span1) {
		var span = this.computeSelectionSpan(span0, span1);

		if (span && !this.view.calendar.isSelectionSpanAllowed(span)) {
			return false;
		}

		return span;
	},


	// Given two spans, must return the combination of the two.
	// TODO: do this separation of concerns (combining VS validation) for event dnd/resize too.
	computeSelectionSpan: function(span0, span1) {
		var dates = [ span0.start, span0.end, span1.start, span1.end ];

		dates.sort(compareNumbers); // sorts chronologically. works with Moments

		return { start: dates[0].clone(), end: dates[3].clone() };
	},


	/* Highlight
	------------------------------------------------------------------------------------------------------------------*/


	// Renders an emphasis on the given date range. Given a span (unzoned start/end and other misc data)
	renderHighlight: function(span) {
		this.renderFill('highlight', this.spanToSegs(span));
	},


	// Unrenders the emphasis on a date range
	unrenderHighlight: function() {
		this.unrenderFill('highlight');
	},


	// Generates an array of classNames for rendering the highlight. Used by the fill system.
	highlightSegClasses: function() {
		return [ 'fc-highlight' ];
	},


	/* Business Hours
	------------------------------------------------------------------------------------------------------------------*/


	renderBusinessHours: function() {
	},


	unrenderBusinessHours: function() {
	},


	/* Now Indicator
	------------------------------------------------------------------------------------------------------------------*/


	getNowIndicatorUnit: function() {
	},


	renderNowIndicator: function(date) {
	},


	unrenderNowIndicator: function() {
	},


	/* Fill System (highlight, background events, business hours)
	--------------------------------------------------------------------------------------------------------------------
	TODO: remove this system. like we did in TimeGrid
	*/


	// Renders a set of rectangles over the given segments of time.
	// MUST RETURN a subset of segs, the segs that were actually rendered.
	// Responsible for populating this.elsByFill. TODO: better API for expressing this requirement
	renderFill: function(type, segs) {
		// subclasses must implement
	},


	// Unrenders a specific type of fill that is currently rendered on the grid
	unrenderFill: function(type) {
		var el = this.elsByFill[type];

		if (el) {
			el.remove();
			delete this.elsByFill[type];
		}
	},


	// Renders and assigns an `el` property for each fill segment. Generic enough to work with different types.
	// Only returns segments that successfully rendered.
	// To be harnessed by renderFill (implemented by subclasses).
	// Analagous to renderFgSegEls.
	renderFillSegEls: function(type, segs) {
		var _this = this;
		var segElMethod = this[type + 'SegEl'];
		var html = '';
		var renderedSegs = [];
		var i;

		if (segs.length) {

			// build a large concatenation of segment HTML
			for (i = 0; i < segs.length; i++) {
				html += this.fillSegHtml(type, segs[i]);
			}

			// Grab individual elements from the combined HTML string. Use each as the default rendering.
			// Then, compute the 'el' for each segment.
			$(html).each(function(i, node) {
				var seg = segs[i];
				var el = $(node);

				// allow custom filter methods per-type
				if (segElMethod) {
					el = segElMethod.call(_this, seg, el);
				}

				if (el) { // custom filters did not cancel the render
					el = $(el); // allow custom filter to return raw DOM node

					// correct element type? (would be bad if a non-TD were inserted into a table for example)
					if (el.is(_this.fillSegTag)) {
						seg.el = el;
						renderedSegs.push(seg);
					}
				}
			});
		}

		return renderedSegs;
	},


	fillSegTag: 'div', // subclasses can override


	// Builds the HTML needed for one fill segment. Generic enought o work with different types.
	fillSegHtml: function(type, seg) {

		// custom hooks per-type
		var classesMethod = this[type + 'SegClasses'];
		var cssMethod = this[type + 'SegCss'];

		var classes = classesMethod ? classesMethod.call(this, seg) : [];
		var css = cssToStr(cssMethod ? cssMethod.call(this, seg) : {});

		return '<' + this.fillSegTag +
			(classes.length ? ' class="' + classes.join(' ') + '"' : '') +
			(css ? ' style="' + css + '"' : '') +
			' />';
	},



	/* Generic rendering utilities for subclasses
	------------------------------------------------------------------------------------------------------------------*/


	// Computes HTML classNames for a single-day element
	getDayClasses: function(date) {
		var view = this.view;
		var today = view.calendar.getNow();
		var classes = [ 'fc-' + dayIDs[date.day()] ];

		if (
			view.intervalDuration.as('months') == 1 &&
			date.month() != view.intervalStart.month()
		) {
			classes.push('fc-other-month');
		}

		if (date.isSame(today, 'day')) {
			classes.push(
				'fc-today',
				view.highlightStateClass
			);
		}
		else if (date < today) {
			classes.push('fc-past');
		}
		else {
			classes.push('fc-future');
		}

		return classes;
	}

});

;;

/* Event-rendering and event-interaction methods for the abstract Grid class
----------------------------------------------------------------------------------------------------------------------*/

Grid.mixin({

	mousedOverSeg: null, // the segment object the user's mouse is over. null if over nothing
	isDraggingSeg: false, // is a segment being dragged? boolean
	isResizingSeg: false, // is a segment being resized? boolean
	isDraggingExternal: false, // jqui-dragging an external element? boolean
	segs: null, // the *event* segments currently rendered in the grid. TODO: rename to `eventSegs`


	// Renders the given events onto the grid
	renderEvents: function(events) {
		var bgEvents = [];
		var fgEvents = [];
		var i;

		for (i = 0; i < events.length; i++) {
			(isBgEvent(events[i]) ? bgEvents : fgEvents).push(events[i]);
		}

		this.segs = [].concat( // record all segs
			this.renderBgEvents(bgEvents),
			this.renderFgEvents(fgEvents)
		);
	},


	renderBgEvents: function(events) {
		var segs = this.eventsToSegs(events);

		// renderBgSegs might return a subset of segs, segs that were actually rendered
		return this.renderBgSegs(segs) || segs;
	},


	renderFgEvents: function(events) {
		var segs = this.eventsToSegs(events);

		// renderFgSegs might return a subset of segs, segs that were actually rendered
		return this.renderFgSegs(segs) || segs;
	},


	// Unrenders all events currently rendered on the grid
	unrenderEvents: function() {
		this.triggerSegMouseout(); // trigger an eventMouseout if user's mouse is over an event

		this.unrenderFgSegs();
		this.unrenderBgSegs();

		this.segs = null;
	},


	// Retrieves all rendered segment objects currently rendered on the grid
	getEventSegs: function() {
		return this.segs || [];
	},


	/* Foreground Segment Rendering
	------------------------------------------------------------------------------------------------------------------*/


	// Renders foreground event segments onto the grid. May return a subset of segs that were rendered.
	renderFgSegs: function(segs) {
		// subclasses must implement
	},


	// Unrenders all currently rendered foreground segments
	unrenderFgSegs: function() {
		// subclasses must implement
	},


	// Renders and assigns an `el` property for each foreground event segment.
	// Only returns segments that successfully rendered.
	// A utility that subclasses may use.
	renderFgSegEls: function(segs, disableResizing) {
		var view = this.view;
		var html = '';
		var renderedSegs = [];
		var i;

		if (segs.length) { // don't build an empty html string

			// build a large concatenation of event segment HTML
			for (i = 0; i < segs.length; i++) {
				html += this.fgSegHtml(segs[i], disableResizing);
			}

			// Grab individual elements from the combined HTML string. Use each as the default rendering.
			// Then, compute the 'el' for each segment. An el might be null if the eventRender callback returned false.
			$(html).each(function(i, node) {
				var seg = segs[i];
				var el = view.resolveEventEl(seg.event, $(node));

				if (el) {
					el.data('fc-seg', seg); // used by handlers
					seg.el = el;
					renderedSegs.push(seg);
				}
			});
		}

		return renderedSegs;
	},


	// Generates the HTML for the default rendering of a foreground event segment. Used by renderFgSegEls()
	fgSegHtml: function(seg, disableResizing) {
		// subclasses should implement
	},


	/* Background Segment Rendering
	------------------------------------------------------------------------------------------------------------------*/


	// Renders the given background event segments onto the grid.
	// Returns a subset of the segs that were actually rendered.
	renderBgSegs: function(segs) {
		return this.renderFill('bgEvent', segs);
	},


	// Unrenders all the currently rendered background event segments
	unrenderBgSegs: function() {
		this.unrenderFill('bgEvent');
	},


	// Renders a background event element, given the default rendering. Called by the fill system.
	bgEventSegEl: function(seg, el) {
		return this.view.resolveEventEl(seg.event, el); // will filter through eventRender
	},


	// Generates an array of classNames to be used for the default rendering of a background event.
	// Called by the fill system.
	bgEventSegClasses: function(seg) {
		var event = seg.event;
		var source = event.source || {};

		return [ 'fc-bgevent' ].concat(
			event.className,
			source.className || []
		);
	},


	// Generates a semicolon-separated CSS string to be used for the default rendering of a background event.
	// Called by the fill system.
	// TODO: consolidate with getEventSkinCss?
	bgEventSegCss: function(seg) {
		var view = this.view;
		var event = seg.event;
		var source = event.source || {};

		return {
			'background-color':
				event.backgroundColor ||
				event.color ||
				source.backgroundColor ||
				source.color ||
				view.opt('eventBackgroundColor') ||
				view.opt('eventColor')
		};
	},


	// Generates an array of classNames to be used for the rendering business hours overlay. Called by the fill system.
	businessHoursSegClasses: function(seg) {
		return [ 'fc-nonbusiness', 'fc-bgevent' ];
	},


	/* Handlers
	------------------------------------------------------------------------------------------------------------------*/


	// Attaches event-element-related handlers to the container element and leverage bubbling
	bindSegHandlers: function() {
		var _this = this;
		var view = this.view;

		$.each(
			{
				mouseenter: function(seg, ev) {
					_this.triggerSegMouseover(seg, ev);
				},
				mouseleave: function(seg, ev) {
					_this.triggerSegMouseout(seg, ev);
				},
				click: function(seg, ev) {
					return view.trigger('eventClick', this, seg.event, ev); // can return `false` to cancel
				},
				mousedown: function(seg, ev) {
					if ($(ev.target).is('.fc-resizer') && view.isEventResizable(seg.event)) {
						_this.segResizeMousedown(seg, ev, $(ev.target).is('.fc-start-resizer'));
					}
					else if (view.isEventDraggable(seg.event)) {
						_this.segDragMousedown(seg, ev);
					}
				}
			},
			function(name, func) {
				// attach the handler to the container element and only listen for real event elements via bubbling
				_this.el.on(name, '.fc-event-container > *', function(ev) {
					var seg = $(this).data('fc-seg'); // grab segment data. put there by View::renderEvents

					// only call the handlers if there is not a drag/resize in progress
					if (seg && !_this.isDraggingSeg && !_this.isResizingSeg) {
						return func.call(this, seg, ev); // `this` will be the event element
					}
				});
			}
		);
	},


	// Updates internal state and triggers handlers for when an event element is moused over
	triggerSegMouseover: function(seg, ev) {
		if (!this.mousedOverSeg) {
			this.mousedOverSeg = seg;
			this.view.trigger('eventMouseover', seg.el[0], seg.event, ev);
		}
	},


	// Updates internal state and triggers handlers for when an event element is moused out.
	// Can be given no arguments, in which case it will mouseout the segment that was previously moused over.
	triggerSegMouseout: function(seg, ev) {
		ev = ev || {}; // if given no args, make a mock mouse event

		if (this.mousedOverSeg) {
			seg = seg || this.mousedOverSeg; // if given no args, use the currently moused-over segment
			this.mousedOverSeg = null;
			this.view.trigger('eventMouseout', seg.el[0], seg.event, ev);
		}
	},


	/* Event Dragging
	------------------------------------------------------------------------------------------------------------------*/


	// Called when the user does a mousedown on an event, which might lead to dragging.
	// Generic enough to work with any type of Grid.
	segDragMousedown: function(seg, ev) {
		var _this = this;
		var view = this.view;
		var calendar = view.calendar;
		var el = seg.el;
		var event = seg.event;
		var dropLocation; // zoned event date properties

		// A clone of the original element that will move with the mouse
		var mouseFollower = new MouseFollower(seg.el, {
			parentEl: view.el,
			opacity: view.opt('dragOpacity'),
			revertDuration: view.opt('dragRevertDuration'),
			zIndex: 2 // one above the .fc-view
		});

		// Tracks mouse movement over the *view's* coordinate map. Allows dragging and dropping between subcomponents
		// of the view.
		var dragListener = new HitDragListener(view, {
			distance: 5,
			scroll: view.opt('dragScroll'),
			subjectEl: el,
			subjectCenter: true,
			listenStart: function(ev) {
				mouseFollower.hide(); // don't show until we know this is a real drag
				mouseFollower.start(ev);
			},
			dragStart: function(ev) {
				_this.triggerSegMouseout(seg, ev); // ensure a mouseout on the manipulated event has been reported
				_this.segDragStart(seg, ev);
				view.hideEvent(event); // hide all event segments. our mouseFollower will take over
			},
			hitOver: function(hit, isOrig, origHit) {

				// starting hit could be forced (DayGrid.limit)
				if (seg.hit) {
					origHit = seg.hit;
				}

				// since we are querying the parent view, might not belong to this grid
				dropLocation = _this.computeEventDrop(
					origHit.component.getHitSpan(origHit),
					hit.component.getHitSpan(hit),
					event
				);

				if (dropLocation && !calendar.isEventSpanAllowed(_this.eventToSpan(dropLocation), event)) {
					disableCursor();
					dropLocation = null;
				}

				// if a valid drop location, have the subclass render a visual indication
				if (dropLocation && view.renderDrag(dropLocation, seg)) {
					mouseFollower.hide(); // if the subclass is already using a mock event "helper", hide our own
				}
				else {
					mouseFollower.show(); // otherwise, have the helper follow the mouse (no snapping)
				}

				if (isOrig) {
					dropLocation = null; // needs to have moved hits to be a valid drop
				}
			},
			hitOut: function() { // called before mouse moves to a different hit OR moved out of all hits
				view.unrenderDrag(); // unrender whatever was done in renderDrag
				mouseFollower.show(); // show in case we are moving out of all hits
				dropLocation = null;
			},
			hitDone: function() { // Called after a hitOut OR before a dragStop
				enableCursor();
			},
			dragStop: function(ev) {
				// do revert animation if hasn't changed. calls a callback when finished (whether animation or not)
				mouseFollower.stop(!dropLocation, function() {
					view.unrenderDrag();
					view.showEvent(event);
					_this.segDragStop(seg, ev);

					if (dropLocation) {
						view.reportEventDrop(event, dropLocation, this.largeUnit, el, ev);
					}
				});
			},
			listenStop: function() {
				mouseFollower.stop(); // put in listenStop in case there was a mousedown but the drag never started
			}
		});

		dragListener.mousedown(ev); // start listening, which will eventually lead to a dragStart
	},


	// Called before event segment dragging starts
	segDragStart: function(seg, ev) {
		this.isDraggingSeg = true;
		this.view.trigger('eventDragStart', seg.el[0], seg.event, ev, {}); // last argument is jqui dummy
	},


	// Called after event segment dragging stops
	segDragStop: function(seg, ev) {
		this.isDraggingSeg = false;
		this.view.trigger('eventDragStop', seg.el[0], seg.event, ev, {}); // last argument is jqui dummy
	},


	// Given the spans an event drag began, and the span event was dropped, calculates the new zoned start/end/allDay
	// values for the event. Subclasses may override and set additional properties to be used by renderDrag.
	// A falsy returned value indicates an invalid drop.
	// DOES NOT consider overlap/constraint.
	computeEventDrop: function(startSpan, endSpan, event) {
		var calendar = this.view.calendar;
		var dragStart = startSpan.start;
		var dragEnd = endSpan.start;
		var delta;
		var dropLocation; // zoned event date properties

		if (dragStart.hasTime() === dragEnd.hasTime()) {
			delta = this.diffDates(dragEnd, dragStart);

			// if an all-day event was in a timed area and it was dragged to a different time,
			// guarantee an end and adjust start/end to have times
			if (event.allDay && durationHasTime(delta)) {
				dropLocation = {
					start: event.start.clone(),
					end: calendar.getEventEnd(event), // will be an ambig day
					allDay: false // for normalizeEventTimes
				};
				calendar.normalizeEventTimes(dropLocation);
			}
			// othewise, work off existing values
			else {
				dropLocation = {
					start: event.start.clone(),
					end: event.end ? event.end.clone() : null,
					allDay: event.allDay // keep it the same
				};
			}

			dropLocation.start.add(delta);
			if (dropLocation.end) {
				dropLocation.end.add(delta);
			}
		}
		else {
			// if switching from day <-> timed, start should be reset to the dropped date, and the end cleared
			dropLocation = {
				start: dragEnd.clone(),
				end: null, // end should be cleared
				allDay: !dragEnd.hasTime()
			};
		}

		return dropLocation;
	},


	// Utility for apply dragOpacity to a jQuery set
	applyDragOpacity: function(els) {
		var opacity = this.view.opt('dragOpacity');

		if (opacity != null) {
			els.each(function(i, node) {
				// Don't use jQuery (will set an IE filter), do it the old fashioned way.
				// In IE8, a helper element will disappears if there's a filter.
				node.style.opacity = opacity;
			});
		}
	},


	/* External Element Dragging
	------------------------------------------------------------------------------------------------------------------*/


	// Called when a jQuery UI drag is initiated anywhere in the DOM
	externalDragStart: function(ev, ui) {
		var view = this.view;
		var el;
		var accept;

		if (view.opt('droppable')) { // only listen if this setting is on
			el = $((ui ? ui.item : null) || ev.target);

			// Test that the dragged element passes the dropAccept selector or filter function.
			// FYI, the default is "*" (matches all)
			accept = view.opt('dropAccept');
			if ($.isFunction(accept) ? accept.call(el[0], el) : el.is(accept)) {
				if (!this.isDraggingExternal) { // prevent double-listening if fired twice
					this.listenToExternalDrag(el, ev, ui);
				}
			}
		}
	},


	// Called when a jQuery UI drag starts and it needs to be monitored for dropping
	listenToExternalDrag: function(el, ev, ui) {
		var _this = this;
		var calendar = this.view.calendar;
		var meta = getDraggedElMeta(el); // extra data about event drop, including possible event to create
		var dropLocation; // a null value signals an unsuccessful drag

		// listener that tracks mouse movement over date-associated pixel regions
		var dragListener = new HitDragListener(this, {
			listenStart: function() {
				_this.isDraggingExternal = true;
			},
			hitOver: function(hit) {
				dropLocation = _this.computeExternalDrop(
					hit.component.getHitSpan(hit), // since we are querying the parent view, might not belong to this grid
					meta
				);

				if ( // invalid hit?
					dropLocation &&
					!calendar.isExternalSpanAllowed(_this.eventToSpan(dropLocation), dropLocation, meta.eventProps)
				) {
					disableCursor();
					dropLocation = null;
				}

				if (dropLocation) {
					_this.renderDrag(dropLocation); // called without a seg parameter
				}
			},
			hitOut: function() {
				dropLocation = null; // signal unsuccessful
			},
			hitDone: function() { // Called after a hitOut OR before a dragStop
				enableCursor();
				_this.unrenderDrag();
			},
			dragStop: function() {
				if (dropLocation) { // element was dropped on a valid hit
					_this.view.reportExternalDrop(meta, dropLocation, el, ev, ui);
				}
			},
			listenStop: function() {
				_this.isDraggingExternal = false;
			}
		});

		dragListener.startDrag(ev); // start listening immediately
	},


	// Given a hit to be dropped upon, and misc data associated with the jqui drag (guaranteed to be a plain object),
	// returns the zoned start/end dates for the event that would result from the hypothetical drop. end might be null.
	// Returning a null value signals an invalid drop hit.
	// DOES NOT consider overlap/constraint.
	computeExternalDrop: function(span, meta) {
		var calendar = this.view.calendar;
		var dropLocation = {
			start: calendar.applyTimezone(span.start), // simulate a zoned event start date
			end: null
		};

		// if dropped on an all-day span, and element's metadata specified a time, set it
		if (meta.startTime && !dropLocation.start.hasTime()) {
			dropLocation.start.time(meta.startTime);
		}

		if (meta.duration) {
			dropLocation.end = dropLocation.start.clone().add(meta.duration);
		}

		return dropLocation;
	},



	/* Drag Rendering (for both events and an external elements)
	------------------------------------------------------------------------------------------------------------------*/


	// Renders a visual indication of an event or external element being dragged.
	// `dropLocation` contains hypothetical start/end/allDay values the event would have if dropped. end can be null.
	// `seg` is the internal segment object that is being dragged. If dragging an external element, `seg` is null.
	// A truthy returned value indicates this method has rendered a helper element.
	renderDrag: function(dropLocation, seg) {
		// subclasses must implement
	},


	// Unrenders a visual indication of an event or external element being dragged
	unrenderDrag: function() {
		// subclasses must implement
	},


	/* Resizing
	------------------------------------------------------------------------------------------------------------------*/


	// Called when the user does a mousedown on an event's resizer, which might lead to resizing.
	// Generic enough to work with any type of Grid.
	segResizeMousedown: function(seg, ev, isStart) {
		var _this = this;
		var view = this.view;
		var calendar = view.calendar;
		var el = seg.el;
		var event = seg.event;
		var eventEnd = calendar.getEventEnd(event);
		var resizeLocation; // zoned event date properties. falsy if invalid resize

		// Tracks mouse movement over the *grid's* coordinate map
		var dragListener = new HitDragListener(this, {
			distance: 5,
			scroll: view.opt('dragScroll'),
			subjectEl: el,
			dragStart: function(ev) {
				_this.triggerSegMouseout(seg, ev); // ensure a mouseout on the manipulated event has been reported
				_this.segResizeStart(seg, ev);
			},
			hitOver: function(hit, isOrig, origHit) {
				var origHitSpan = _this.getHitSpan(origHit);
				var hitSpan = _this.getHitSpan(hit);

				resizeLocation = isStart ?
					_this.computeEventStartResize(origHitSpan, hitSpan, event) :
					_this.computeEventEndResize(origHitSpan, hitSpan, event);

				if (resizeLocation) {
					if (!calendar.isEventSpanAllowed(_this.eventToSpan(resizeLocation), event)) {
						disableCursor();
						resizeLocation = null;
					}
					// no change? (TODO: how does this work with timezones?)
					else if (resizeLocation.start.isSame(event.start) && resizeLocation.end.isSame(eventEnd)) {
						resizeLocation = null;
					}
				}

				if (resizeLocation) {
					view.hideEvent(event);
					_this.renderEventResize(resizeLocation, seg);
				}
			},
			hitOut: function() { // called before mouse moves to a different hit OR moved out of all hits
				resizeLocation = null;
			},
			hitDone: function() { // resets the rendering to show the original event
				_this.unrenderEventResize();
				view.showEvent(event);
				enableCursor();
			},
			dragStop: function(ev) {
				_this.segResizeStop(seg, ev);

				if (resizeLocation) { // valid date to resize to?
					view.reportEventResize(event, resizeLocation, this.largeUnit, el, ev);
				}
			}
		});

		dragListener.mousedown(ev); // start listening, which will eventually lead to a dragStart
	},


	// Called before event segment resizing starts
	segResizeStart: function(seg, ev) {
		this.isResizingSeg = true;
		this.view.trigger('eventResizeStart', seg.el[0], seg.event, ev, {}); // last argument is jqui dummy
	},


	// Called after event segment resizing stops
	segResizeStop: function(seg, ev) {
		this.isResizingSeg = false;
		this.view.trigger('eventResizeStop', seg.el[0], seg.event, ev, {}); // last argument is jqui dummy
	},


	// Returns new date-information for an event segment being resized from its start
	computeEventStartResize: function(startSpan, endSpan, event) {
		return this.computeEventResize('start', startSpan, endSpan, event);
	},


	// Returns new date-information for an event segment being resized from its end
	computeEventEndResize: function(startSpan, endSpan, event) {
		return this.computeEventResize('end', startSpan, endSpan, event);
	},


	// Returns new zoned date information for an event segment being resized from its start OR end
	// `type` is either 'start' or 'end'.
	// DOES NOT consider overlap/constraint.
	computeEventResize: function(type, startSpan, endSpan, event) {
		var calendar = this.view.calendar;
		var delta = this.diffDates(endSpan[type], startSpan[type]);
		var resizeLocation; // zoned event date properties
		var defaultDuration;

		// build original values to work from, guaranteeing a start and end
		resizeLocation = {
			start: event.start.clone(),
			end: calendar.getEventEnd(event),
			allDay: event.allDay
		};

		// if an all-day event was in a timed area and was resized to a time, adjust start/end to have times
		if (resizeLocation.allDay && durationHasTime(delta)) {
			resizeLocation.allDay = false;
			calendar.normalizeEventTimes(resizeLocation);
		}

		resizeLocation[type].add(delta); // apply delta to start or end

		// if the event was compressed too small, find a new reasonable duration for it
		if (!resizeLocation.start.isBefore(resizeLocation.end)) {

			defaultDuration =
				this.minResizeDuration || // TODO: hack
				(event.allDay ?
					calendar.defaultAllDayEventDuration :
					calendar.defaultTimedEventDuration);

			if (type == 'start') { // resizing the start?
				resizeLocation.start = resizeLocation.end.clone().subtract(defaultDuration);
			}
			else { // resizing the end?
				resizeLocation.end = resizeLocation.start.clone().add(defaultDuration);
			}
		}

		return resizeLocation;
	},


	// Renders a visual indication of an event being resized.
	// `range` has the updated dates of the event. `seg` is the original segment object involved in the drag.
	renderEventResize: function(range, seg) {
		// subclasses must implement
	},


	// Unrenders a visual indication of an event being resized.
	unrenderEventResize: function() {
		// subclasses must implement
	},


	/* Rendering Utils
	------------------------------------------------------------------------------------------------------------------*/


	// Compute the text that should be displayed on an event's element.
	// `range` can be the Event object itself, or something range-like, with at least a `start`.
	// If event times are disabled, or the event has no time, will return a blank string.
	// If not specified, formatStr will default to the eventTimeFormat setting,
	// and displayEnd will default to the displayEventEnd setting.
	getEventTimeText: function(range, formatStr, displayEnd) {

		if (formatStr == null) {
			formatStr = this.eventTimeFormat;
		}

		if (displayEnd == null) {
			displayEnd = this.displayEventEnd;
		}

		if (this.displayEventTime && range.start.hasTime()) {
			if (displayEnd && range.end) {
				return this.view.formatRange(range, formatStr);
			}
			else {
				return range.start.format(formatStr);
			}
		}

		return '';
	},


	// Generic utility for generating the HTML classNames for an event segment's element
	getSegClasses: function(seg, isDraggable, isResizable) {
		var event = seg.event;
		var classes = [
			'fc-event',
			seg.isStart ? 'fc-start' : 'fc-not-start',
			seg.isEnd ? 'fc-end' : 'fc-not-end'
		].concat(
			event.className,
			event.source ? event.source.className : []
		);

		if (isDraggable) {
			classes.push('fc-draggable');
		}
		if (isResizable) {
			classes.push('fc-resizable');
		}

		return classes;
	},


	// Utility for generating event skin-related CSS properties
	getEventSkinCss: function(event) {
		var view = this.view;
		var source = event.source || {};
		var eventColor = event.color;
		var sourceColor = source.color;
		var optionColor = view.opt('eventColor');

		return {
			'background-color':
				event.backgroundColor ||
				eventColor ||
				source.backgroundColor ||
				sourceColor ||
				view.opt('eventBackgroundColor') ||
				optionColor,
			'border-color':
				event.borderColor ||
				eventColor ||
				source.borderColor ||
				sourceColor ||
				view.opt('eventBorderColor') ||
				optionColor,
			color:
				event.textColor ||
				source.textColor ||
				view.opt('eventTextColor')
		};
	},


	/* Converting events -> eventRange -> eventSpan -> eventSegs
	------------------------------------------------------------------------------------------------------------------*/


	// Generates an array of segments for the given single event
	// Can accept an event "location" as well (which only has start/end and no allDay)
	eventToSegs: function(event) {
		return this.eventsToSegs([ event ]);
	},


	eventToSpan: function(event) {
		return this.eventToSpans(event)[0];
	},


	// Generates spans (always unzoned) for the given event.
	// Does not do any inverting for inverse-background events.
	// Can accept an event "location" as well (which only has start/end and no allDay)
	eventToSpans: function(event) {
		var range = this.eventToRange(event);
		return this.eventRangeToSpans(range, event);
	},



	// Converts an array of event objects into an array of event segment objects.
	// A custom `segSliceFunc` may be given for arbitrarily slicing up events.
	// Doesn't guarantee an order for the resulting array.
	eventsToSegs: function(allEvents, segSliceFunc) {
		var _this = this;
		var eventsById = groupEventsById(allEvents);
		var segs = [];

		$.each(eventsById, function(id, events) {
			var ranges = [];
			var i;

			for (i = 0; i < events.length; i++) {
				ranges.push(_this.eventToRange(events[i]));
			}

			// inverse-background events (utilize only the first event in calculations)
			if (isInverseBgEvent(events[0])) {
				ranges = _this.invertRanges(ranges);

				for (i = 0; i < ranges.length; i++) {
					segs.push.apply(segs, // append to
						_this.eventRangeToSegs(ranges[i], events[0], segSliceFunc));
				}
			}
			// normal event ranges
			else {
				for (i = 0; i < ranges.length; i++) {
					segs.push.apply(segs, // append to
						_this.eventRangeToSegs(ranges[i], events[i], segSliceFunc));
				}
			}
		});

		return segs;
	},


	// Generates the unzoned start/end dates an event appears to occupy
	// Can accept an event "location" as well (which only has start/end and no allDay)
	eventToRange: function(event) {
		return {
			start: event.start.clone().stripZone(),
			end: (
				event.end ?
					event.end.clone() :
					// derive the end from the start and allDay. compute allDay if necessary
					this.view.calendar.getDefaultEventEnd(
						event.allDay != null ?
							event.allDay :
							!event.start.hasTime(),
						event.start
					)
			).stripZone()
		};
	},


	// Given an event's range (unzoned start/end), and the event itself,
	// slice into segments (using the segSliceFunc function if specified)
	eventRangeToSegs: function(range, event, segSliceFunc) {
		var spans = this.eventRangeToSpans(range, event);
		var segs = [];
		var i;

		for (i = 0; i < spans.length; i++) {
			segs.push.apply(segs, // append to
				this.eventSpanToSegs(spans[i], event, segSliceFunc));
		}

		return segs;
	},


	// Given an event's unzoned date range, return an array of "span" objects.
	// Subclasses can override.
	eventRangeToSpans: function(range, event) {
		return [ $.extend({}, range) ]; // copy into a single-item array
	},


	// Given an event's span (unzoned start/end and other misc data), and the event itself,
	// slices into segments and attaches event-derived properties to them.
	eventSpanToSegs: function(span, event, segSliceFunc) {
		var segs = segSliceFunc ? segSliceFunc(span) : this.spanToSegs(span);
		var i, seg;

		for (i = 0; i < segs.length; i++) {
			seg = segs[i];
			seg.event = event;
			seg.eventStartMS = +span.start; // TODO: not the best name after making spans unzoned
			seg.eventDurationMS = span.end - span.start;
		}

		return segs;
	},


	// Produces a new array of range objects that will cover all the time NOT covered by the given ranges.
	// SIDE EFFECT: will mutate the given array and will use its date references.
	invertRanges: function(ranges) {
		var view = this.view;
		var viewStart = view.start.clone(); // need a copy
		var viewEnd = view.end.clone(); // need a copy
		var inverseRanges = [];
		var start = viewStart; // the end of the previous range. the start of the new range
		var i, range;

		// ranges need to be in order. required for our date-walking algorithm
		ranges.sort(compareRanges);

		for (i = 0; i < ranges.length; i++) {
			range = ranges[i];

			// add the span of time before the event (if there is any)
			if (range.start > start) { // compare millisecond time (skip any ambig logic)
				inverseRanges.push({
					start: start,
					end: range.start
				});
			}

			start = range.end;
		}

		// add the span of time after the last event (if there is any)
		if (start < viewEnd) { // compare millisecond time (skip any ambig logic)
			inverseRanges.push({
				start: start,
				end: viewEnd
			});
		}

		return inverseRanges;
	},


	sortEventSegs: function(segs) {
		segs.sort(proxy(this, 'compareEventSegs'));
	},


	// A cmp function for determining which segments should take visual priority
	compareEventSegs: function(seg1, seg2) {
		return seg1.eventStartMS - seg2.eventStartMS || // earlier events go first
			seg2.eventDurationMS - seg1.eventDurationMS || // tie? longer events go first
			seg2.event.allDay - seg1.event.allDay || // tie? put all-day events first (booleans cast to 0/1)
			compareByFieldSpecs(seg1.event, seg2.event, this.view.eventOrderSpecs);
	}

});


/* Utilities
----------------------------------------------------------------------------------------------------------------------*/


function isBgEvent(event) { // returns true if background OR inverse-background
	var rendering = getEventRendering(event);
	return rendering === 'background' || rendering === 'inverse-background';
}
FC.isBgEvent = isBgEvent; // export


function isInverseBgEvent(event) {
	return getEventRendering(event) === 'inverse-background';
}


function getEventRendering(event) {
	return firstDefined((event.source || {}).rendering, event.rendering);
}


function groupEventsById(events) {
	var eventsById = {};
	var i, event;

	for (i = 0; i < events.length; i++) {
		event = events[i];
		(eventsById[event._id] || (eventsById[event._id] = [])).push(event);
	}

	return eventsById;
}


// A cmp function for determining which non-inverted "ranges" (see above) happen earlier
function compareRanges(range1, range2) {
	return range1.start - range2.start; // earlier ranges go first
}


/* External-Dragging-Element Data
----------------------------------------------------------------------------------------------------------------------*/

// Require all HTML5 data-* attributes used by FullCalendar to have this prefix.
// A value of '' will query attributes like data-event. A value of 'fc' will query attributes like data-fc-event.
FC.dataAttrPrefix = '';

// Given a jQuery element that might represent a dragged FullCalendar event, returns an intermediate data structure
// to be used for Event Object creation.
// A defined `.eventProps`, even when empty, indicates that an event should be created.
function getDraggedElMeta(el) {
	var prefix = FC.dataAttrPrefix;
	var eventProps; // properties for creating the event, not related to date/time
	var startTime; // a Duration
	var duration;
	var stick;

	if (prefix) { prefix += '-'; }
	eventProps = el.data(prefix + 'event') || null;

	if (eventProps) {
		if (typeof eventProps === 'object') {
			eventProps = $.extend({}, eventProps); // make a copy
		}
		else { // something like 1 or true. still signal event creation
			eventProps = {};
		}

		// pluck special-cased date/time properties
		startTime = eventProps.start;
		if (startTime == null) { startTime = eventProps.time; } // accept 'time' as well
		duration = eventProps.duration;
		stick = eventProps.stick;
		delete eventProps.start;
		delete eventProps.time;
		delete eventProps.duration;
		delete eventProps.stick;
	}

	// fallback to standalone attribute values for each of the date/time properties
	if (startTime == null) { startTime = el.data(prefix + 'start'); }
	if (startTime == null) { startTime = el.data(prefix + 'time'); } // accept 'time' as well
	if (duration == null) { duration = el.data(prefix + 'duration'); }
	if (stick == null) { stick = el.data(prefix + 'stick'); }

	// massage into correct data types
	startTime = startTime != null ? moment.duration(startTime) : null;
	duration = duration != null ? moment.duration(duration) : null;
	stick = Boolean(stick);

	return { eventProps: eventProps, startTime: startTime, duration: duration, stick: stick };
}


;;

/*
A set of rendering and date-related methods for a visual component comprised of one or more rows of day columns.
Prerequisite: the object being mixed into needs to be a *Grid*
*/
var DayTableMixin = FC.DayTableMixin = {

	breakOnWeeks: false, // should create a new row for each week?
	dayDates: null, // whole-day dates for each column. left to right
	dayIndices: null, // for each day from start, the offset
	daysPerRow: null,
	rowCnt: null,
	colCnt: null,
	colHeadFormat: null,


	// Populates internal variables used for date calculation and rendering
	updateDayTable: function() {
		var view = this.view;
		var date = this.start.clone();
		var dayIndex = -1;
		var dayIndices = [];
		var dayDates = [];
		var daysPerRow;
		var firstDay;
		var rowCnt;

		while (date.isBefore(this.end)) { // loop each day from start to end
			if (view.isHiddenDay(date)) {
				dayIndices.push(dayIndex + 0.5); // mark that it's between indices
			}
			else {
				dayIndex++;
				dayIndices.push(dayIndex);
				dayDates.push(date.clone());
			}
			date.add(1, 'days');
		}

		if (this.breakOnWeeks) {
			// count columns until the day-of-week repeats
			firstDay = dayDates[0].day();
			for (daysPerRow = 1; daysPerRow < dayDates.length; daysPerRow++) {
				if (dayDates[daysPerRow].day() == firstDay) {
					break;
				}
			}
			rowCnt = Math.ceil(dayDates.length / daysPerRow);
		}
		else {
			rowCnt = 1;
			daysPerRow = dayDates.length;
		}

		this.dayDates = dayDates;
		this.dayIndices = dayIndices;
		this.daysPerRow = daysPerRow;
		this.rowCnt = rowCnt;
		
		this.updateDayTableCols();
	},


	// Computes and assigned the colCnt property and updates any options that may be computed from it
	updateDayTableCols: function() {
		this.colCnt = this.computeColCnt();
		this.colHeadFormat = this.view.opt('columnFormat') || this.computeColHeadFormat();
	},


	// Determines how many columns there should be in the table
	computeColCnt: function() {
		return this.daysPerRow;
	},


	// Computes the ambiguously-timed moment for the given cell
	getCellDate: function(row, col) {
		return this.dayDates[
				this.getCellDayIndex(row, col)
			].clone();
	},


	// Computes the ambiguously-timed date range for the given cell
	getCellRange: function(row, col) {
		var start = this.getCellDate(row, col);
		var end = start.clone().add(1, 'days');

		return { start: start, end: end };
	},


	// Returns the number of day cells, chronologically, from the first of the grid (0-based)
	getCellDayIndex: function(row, col) {
		return row * this.daysPerRow + this.getColDayIndex(col);
	},


	// Returns the numner of day cells, chronologically, from the first cell in *any given row*
	getColDayIndex: function(col) {
		if (this.isRTL) {
			return this.colCnt - 1 - col;
		}
		else {
			return col;
		}
	},


	// Given a date, returns its chronolocial cell-index from the first cell of the grid.
	// If the date lies between cells (because of hiddenDays), returns a floating-point value between offsets.
	// If before the first offset, returns a negative number.
	// If after the last offset, returns an offset past the last cell offset.
	// Only works for *start* dates of cells. Will not work for exclusive end dates for cells.
	getDateDayIndex: function(date) {
		var dayIndices = this.dayIndices;
		var dayOffset = date.diff(this.start, 'days');

		if (dayOffset < 0) {
			return dayIndices[0] - 1;
		}
		else if (dayOffset >= dayIndices.length) {
			return dayIndices[dayIndices.length - 1] + 1;
		}
		else {
			return dayIndices[dayOffset];
		}
	},


	/* Options
	------------------------------------------------------------------------------------------------------------------*/


	// Computes a default column header formatting string if `colFormat` is not explicitly defined
	computeColHeadFormat: function() {
		// if more than one week row, or if there are a lot of columns with not much space,
		// put just the day numbers will be in each cell
		if (this.rowCnt > 1 || this.colCnt > 10) {
			return 'ddd'; // "Sat"
		}
		// multiple days, so full single date string WON'T be in title text
		else if (this.colCnt > 1) {
			return this.view.opt('dayOfMonthFormat'); // "Sat 12/10"
		}
		// single day, so full single date string will probably be in title text
		else {
			return 'dddd'; // "Saturday"
		}
	},


	/* Slicing
	------------------------------------------------------------------------------------------------------------------*/


	// Slices up a date range into a segment for every week-row it intersects with
	sliceRangeByRow: function(range) {
		var daysPerRow = this.daysPerRow;
		var normalRange = this.view.computeDayRange(range); // make whole-day range, considering nextDayThreshold
		var rangeFirst = this.getDateDayIndex(normalRange.start); // inclusive first index
		var rangeLast = this.getDateDayIndex(normalRange.end.clone().subtract(1, 'days')); // inclusive last index
		var segs = [];
		var row;
		var rowFirst, rowLast; // inclusive day-index range for current row
		var segFirst, segLast; // inclusive day-index range for segment

		for (row = 0; row < this.rowCnt; row++) {
			rowFirst = row * daysPerRow;
			rowLast = rowFirst + daysPerRow - 1;

			// intersect segment's offset range with the row's
			segFirst = Math.max(rangeFirst, rowFirst);
			segLast = Math.min(rangeLast, rowLast);

			// deal with in-between indices
			segFirst = Math.ceil(segFirst); // in-between starts round to next cell
			segLast = Math.floor(segLast); // in-between ends round to prev cell

			if (segFirst <= segLast) { // was there any intersection with the current row?
				segs.push({
					row: row,

					// normalize to start of row
					firstRowDayIndex: segFirst - rowFirst,
					lastRowDayIndex: segLast - rowFirst,

					// must be matching integers to be the segment's start/end
					isStart: segFirst === rangeFirst,
					isEnd: segLast === rangeLast
				});
			}
		}

		return segs;
	},


	// Slices up a date range into a segment for every day-cell it intersects with.
	// TODO: make more DRY with sliceRangeByRow somehow.
	sliceRangeByDay: function(range) {
		var daysPerRow = this.daysPerRow;
		var normalRange = this.view.computeDayRange(range); // make whole-day range, considering nextDayThreshold
		var rangeFirst = this.getDateDayIndex(normalRange.start); // inclusive first index
		var rangeLast = this.getDateDayIndex(normalRange.end.clone().subtract(1, 'days')); // inclusive last index
		var segs = [];
		var row;
		var rowFirst, rowLast; // inclusive day-index range for current row
		var i;
		var segFirst, segLast; // inclusive day-index range for segment

		for (row = 0; row < this.rowCnt; row++) {
			rowFirst = row * daysPerRow;
			rowLast = rowFirst + daysPerRow - 1;

			for (i = rowFirst; i <= rowLast; i++) {

				// intersect segment's offset range with the row's
				segFirst = Math.max(rangeFirst, i);
				segLast = Math.min(rangeLast, i);

				// deal with in-between indices
				segFirst = Math.ceil(segFirst); // in-between starts round to next cell
				segLast = Math.floor(segLast); // in-between ends round to prev cell

				if (segFirst <= segLast) { // was there any intersection with the current row?
					segs.push({
						row: row,

						// normalize to start of row
						firstRowDayIndex: segFirst - rowFirst,
						lastRowDayIndex: segLast - rowFirst,

						// must be matching integers to be the segment's start/end
						isStart: segFirst === rangeFirst,
						isEnd: segLast === rangeLast
					});
				}
			}
		}

		return segs;
	},


	/* Header Rendering
	------------------------------------------------------------------------------------------------------------------*/


	renderHeadHtml: function() {
		var view = this.view;

		return '' +
			'<div class="fc-row ' + view.widgetHeaderClass + '">' +
				'<table>' +
					'<thead>' +
						this.renderHeadTrHtml() +
					'</thead>' +
				'</table>' +
			'</div>';
	},


	renderHeadIntroHtml: function() {
		return this.renderIntroHtml(); // fall back to generic
	},


	renderHeadTrHtml: function() {
		return '' +
			'<tr>' +
				(this.isRTL ? '' : this.renderHeadIntroHtml()) +
				this.renderHeadDateCellsHtml() +
				(this.isRTL ? this.renderHeadIntroHtml() : '') +
			'</tr>';
	},


	renderHeadDateCellsHtml: function() {
		var htmls = [];
		var col, date;

		for (col = 0; col < this.colCnt; col++) {
			date = this.getCellDate(0, col);
			htmls.push(this.renderHeadDateCellHtml(date));
		}

		return htmls.join('');
	},


	// TODO: when internalApiVersion, accept an object for HTML attributes
	// (colspan should be no different)
	renderHeadDateCellHtml: function(date, colspan, otherAttrs) {
		var view = this.view;

		return '' +
			'<th class="fc-day-header ' + view.widgetHeaderClass + ' fc-' + dayIDs[date.day()] + '"' +
				(this.rowCnt == 1 ?
					' data-date="' + date.format('YYYY-MM-DD') + '"' :
					'') +
				(colspan > 1 ?
					' colspan="' + colspan + '"' :
					'') +
				(otherAttrs ?
					' ' + otherAttrs :
					'') +
			'>' +
				htmlEscape(date.format(this.colHeadFormat)) +
			'</th>';
	},


	/* Background Rendering
	------------------------------------------------------------------------------------------------------------------*/


	renderBgTrHtml: function(row) {
		return '' +
			'<tr>' +
				(this.isRTL ? '' : this.renderBgIntroHtml(row)) +
				this.renderBgCellsHtml(row) +
				(this.isRTL ? this.renderBgIntroHtml(row) : '') +
			'</tr>';
	},


	renderBgIntroHtml: function(row) {
		return this.renderIntroHtml(); // fall back to generic
	},


	renderBgCellsHtml: function(row) {
		var htmls = [];
		var col, date;

		for (col = 0; col < this.colCnt; col++) {
			date = this.getCellDate(row, col);
			htmls.push(this.renderBgCellHtml(date));
		}

		return htmls.join('');
	},


	renderBgCellHtml: function(date, otherAttrs) {
		var view = this.view;
		var classes = this.getDayClasses(date);

		classes.unshift('fc-day', view.widgetContentClass);

		return '<td class="' + classes.join(' ') + '"' +
			' data-date="' + date.format('YYYY-MM-DD') + '"' + // if date has a time, won't format it
			(otherAttrs ?
				' ' + otherAttrs :
				'') +
			'></td>';
	},


	/* Generic
	------------------------------------------------------------------------------------------------------------------*/


	// Generates the default HTML intro for any row. User classes should override
	renderIntroHtml: function() {
	},


	// TODO: a generic method for dealing with <tr>, RTL, intro
	// when increment internalApiVersion
	// wrapTr (scheduler)


	/* Utils
	------------------------------------------------------------------------------------------------------------------*/


	// Applies the generic "intro" and "outro" HTML to the given cells.
	// Intro means the leftmost cell when the calendar is LTR and the rightmost cell when RTL. Vice-versa for outro.
	bookendCells: function(trEl) {
		var introHtml = this.renderIntroHtml();

		if (introHtml) {
			if (this.isRTL) {
				trEl.append(introHtml);
			}
			else {
				trEl.prepend(introHtml);
			}
		}
	}

};

;;

/* A component that renders a grid of whole-days that runs horizontally. There can be multiple rows, one per week.
----------------------------------------------------------------------------------------------------------------------*/

var DayGrid = FC.DayGrid = Grid.extend(DayTableMixin, {

	numbersVisible: false, // should render a row for day/week numbers? set by outside view. TODO: make internal
	bottomCoordPadding: 0, // hack for extending the hit area for the last row of the coordinate grid

	rowEls: null, // set of fake row elements
	cellEls: null, // set of whole-day elements comprising the row's background
	helperEls: null, // set of cell skeleton elements for rendering the mock event "helper"

	rowCoordCache: null,
	colCoordCache: null,


	// Renders the rows and columns into the component's `this.el`, which should already be assigned.
	// isRigid determins whether the individual rows should ignore the contents and be a constant height.
	// Relies on the view's colCnt and rowCnt. In the future, this component should probably be self-sufficient.
	renderDates: function(isRigid) {
		var view = this.view;
		var rowCnt = this.rowCnt;
		var colCnt = this.colCnt;
		var html = '';
		var row;
		var col;

		for (row = 0; row < rowCnt; row++) {
			html += this.renderDayRowHtml(row, isRigid);
		}
		this.el.html(html);

		this.rowEls = this.el.find('.fc-row');
		this.cellEls = this.el.find('.fc-day');

		this.rowCoordCache = new CoordCache({
			els: this.rowEls,
			isVertical: true
		});
		this.colCoordCache = new CoordCache({
			els: this.cellEls.slice(0, this.colCnt), // only the first row
			isHorizontal: true
		});

		// trigger dayRender with each cell's element
		for (row = 0; row < rowCnt; row++) {
			for (col = 0; col < colCnt; col++) {
				view.trigger(
					'dayRender',
					null,
					this.getCellDate(row, col),
					this.getCellEl(row, col)
				);
			}
		}
	},


	unrenderDates: function() {
		this.removeSegPopover();
	},


	renderBusinessHours: function() {
		var events = this.view.calendar.getBusinessHoursEvents(true); // wholeDay=true
		var segs = this.eventsToSegs(events);

		this.renderFill('businessHours', segs, 'bgevent');
	},


	// Generates the HTML for a single row, which is a div that wraps a table.
	// `row` is the row number.
	renderDayRowHtml: function(row, isRigid) {
		var view = this.view;
		var classes = [ 'fc-row', 'fc-week', view.widgetContentClass ];

		if (isRigid) {
			classes.push('fc-rigid');
		}

		return '' +
			'<div class="' + classes.join(' ') + '">' +
				'<div class="fc-bg">' +
					'<table>' +
						this.renderBgTrHtml(row) +
					'</table>' +
				'</div>' +
				'<div class="fc-content-skeleton">' +
					'<table>' +
						(this.numbersVisible ?
							'<thead>' +
								this.renderNumberTrHtml(row) +
							'</thead>' :
							''
							) +
					'</table>' +
				'</div>' +
			'</div>';
	},


	/* Grid Number Rendering
	------------------------------------------------------------------------------------------------------------------*/


	renderNumberTrHtml: function(row) {
		return '' +
			'<tr>' +
				(this.isRTL ? '' : this.renderNumberIntroHtml(row)) +
				this.renderNumberCellsHtml(row) +
				(this.isRTL ? this.renderNumberIntroHtml(row) : '') +
			'</tr>';
	},


	renderNumberIntroHtml: function(row) {
		return this.renderIntroHtml();
	},


	renderNumberCellsHtml: function(row) {
		var htmls = [];
		var col, date;

		for (col = 0; col < this.colCnt; col++) {
			date = this.getCellDate(row, col);
			htmls.push(this.renderNumberCellHtml(date));
		}

		return htmls.join('');
	},


	// Generates the HTML for the <td>s of the "number" row in the DayGrid's content skeleton.
	// The number row will only exist if either day numbers or week numbers are turned on.
	renderNumberCellHtml: function(date) {
		var classes;

		if (!this.view.dayNumbersVisible) { // if there are week numbers but not day numbers
			return '<td/>'; //  will create an empty space above events :(
		}

		classes = this.getDayClasses(date);
		classes.unshift('fc-day-number');

		return '' +
			'<td class="' + classes.join(' ') + '" data-date="' + date.format() + '">' +
				date.date() +
			'</td>';
	},


	/* Options
	------------------------------------------------------------------------------------------------------------------*/


	// Computes a default event time formatting string if `timeFormat` is not explicitly defined
	computeEventTimeFormat: function() {
		return this.view.opt('extraSmallTimeFormat'); // like "6p" or "6:30p"
	},


	// Computes a default `displayEventEnd` value if one is not expliclty defined
	computeDisplayEventEnd: function() {
		return this.colCnt == 1; // we'll likely have space if there's only one day
	},


	/* Dates
	------------------------------------------------------------------------------------------------------------------*/


	rangeUpdated: function() {
		this.updateDayTable();
	},


	// Slices up the given span (unzoned start/end with other misc data) into an array of segments
	spanToSegs: function(span) {
		var segs = this.sliceRangeByRow(span);
		var i, seg;

		for (i = 0; i < segs.length; i++) {
			seg = segs[i];
			if (this.isRTL) {
				seg.leftCol = this.daysPerRow - 1 - seg.lastRowDayIndex;
				seg.rightCol = this.daysPerRow - 1 - seg.firstRowDayIndex;
			}
			else {
				seg.leftCol = seg.firstRowDayIndex;
				seg.rightCol = seg.lastRowDayIndex;
			}
		}

		return segs;
	},


	/* Hit System
	------------------------------------------------------------------------------------------------------------------*/


	prepareHits: function() {
		this.colCoordCache.build();
		this.rowCoordCache.build();
		this.rowCoordCache.bottoms[this.rowCnt - 1] += this.bottomCoordPadding; // hack
	},


	releaseHits: function() {
		this.colCoordCache.clear();
		this.rowCoordCache.clear();
	},


	queryHit: function(leftOffset, topOffset) {
		var col = this.colCoordCache.getHorizontalIndex(leftOffset);
		var row = this.rowCoordCache.getVerticalIndex(topOffset);

		if (row != null && col != null) {
			return this.getCellHit(row, col);
		}
	},


	getHitSpan: function(hit) {
		return this.getCellRange(hit.row, hit.col);
	},


	getHitEl: function(hit) {
		return this.getCellEl(hit.row, hit.col);
	},


	/* Cell System
	------------------------------------------------------------------------------------------------------------------*/
	// FYI: the first column is the leftmost column, regardless of date


	getCellHit: function(row, col) {
		return {
			row: row,
			col: col,
			component: this, // needed unfortunately :(
			left: this.colCoordCache.getLeftOffset(col),
			right: this.colCoordCache.getRightOffset(col),
			top: this.rowCoordCache.getTopOffset(row),
			bottom: this.rowCoordCache.getBottomOffset(row)
		};
	},


	getCellEl: function(row, col) {
		return this.cellEls.eq(row * this.colCnt + col);
	},


	/* Event Drag Visualization
	------------------------------------------------------------------------------------------------------------------*/
	// TODO: move to DayGrid.event, similar to what we did with Grid's drag methods


	// Renders a visual indication of an event or external element being dragged.
	// `eventLocation` has zoned start and end (optional)
	renderDrag: function(eventLocation, seg) {

		// always render a highlight underneath
		this.renderHighlight(this.eventToSpan(eventLocation));

		// if a segment from the same calendar but another component is being dragged, render a helper event
		if (seg && !seg.el.closest(this.el).length) {

			this.renderEventLocationHelper(eventLocation, seg);
			this.applyDragOpacity(this.helperEls);

			return true; // a helper has been rendered
		}
	},


	// Unrenders any visual indication of a hovering event
	unrenderDrag: function() {
		this.unrenderHighlight();
		this.unrenderHelper();
	},


	/* Event Resize Visualization
	------------------------------------------------------------------------------------------------------------------*/


	// Renders a visual indication of an event being resized
	renderEventResize: function(eventLocation, seg) {
		this.renderHighlight(this.eventToSpan(eventLocation));
		this.renderEventLocationHelper(eventLocation, seg);
	},


	// Unrenders a visual indication of an event being resized
	unrenderEventResize: function() {
		this.unrenderHighlight();
		this.unrenderHelper();
	},


	/* Event Helper
	------------------------------------------------------------------------------------------------------------------*/


	// Renders a mock "helper" event. `sourceSeg` is the associated internal segment object. It can be null.
	renderHelper: function(event, sourceSeg) {
		var helperNodes = [];
		var segs = this.eventToSegs(event);
		var rowStructs;

		segs = this.renderFgSegEls(segs); // assigns each seg's el and returns a subset of segs that were rendered
		rowStructs = this.renderSegRows(segs);

		// inject each new event skeleton into each associated row
		this.rowEls.each(function(row, rowNode) {
			var rowEl = $(rowNode); // the .fc-row
			var skeletonEl = $('<div class="fc-helper-skeleton"><table/></div>'); // will be absolutely positioned
			var skeletonTop;

			// If there is an original segment, match the top position. Otherwise, put it at the row's top level
			if (sourceSeg && sourceSeg.row === row) {
				skeletonTop = sourceSeg.el.position().top;
			}
			else {
				skeletonTop = rowEl.find('.fc-content-skeleton tbody').position().top;
			}

			skeletonEl.css('top', skeletonTop)
				.find('table')
					.append(rowStructs[row].tbodyEl);

			rowEl.append(skeletonEl);
			helperNodes.push(skeletonEl[0]);
		});

		this.helperEls = $(helperNodes); // array -> jQuery set
	},


	// Unrenders any visual indication of a mock helper event
	unrenderHelper: function() {
		if (this.helperEls) {
			this.helperEls.remove();
			this.helperEls = null;
		}
	},


	/* Fill System (highlight, background events, business hours)
	------------------------------------------------------------------------------------------------------------------*/


	fillSegTag: 'td', // override the default tag name


	// Renders a set of rectangles over the given segments of days.
	// Only returns segments that successfully rendered.
	renderFill: function(type, segs, className) {
		var nodes = [];
		var i, seg;
		var skeletonEl;

		segs = this.renderFillSegEls(type, segs); // assignes `.el` to each seg. returns successfully rendered segs

		for (i = 0; i < segs.length; i++) {
			seg = segs[i];
			skeletonEl = this.renderFillRow(type, seg, className);
			this.rowEls.eq(seg.row).append(skeletonEl);
			nodes.push(skeletonEl[0]);
		}

		this.elsByFill[type] = $(nodes);

		return segs;
	},


	// Generates the HTML needed for one row of a fill. Requires the seg's el to be rendered.
	renderFillRow: function(type, seg, className) {
		var colCnt = this.colCnt;
		var startCol = seg.leftCol;
		var endCol = seg.rightCol + 1;
		var skeletonEl;
		var trEl;

		className = className || type.toLowerCase();

		skeletonEl = $(
			'<div class="fc-' + className + '-skeleton">' +
				'<table><tr/></table>' +
			'</div>'
		);
		trEl = skeletonEl.find('tr');

		if (startCol > 0) {
			trEl.append('<td colspan="' + startCol + '"/>');
		}

		trEl.append(
			seg.el.attr('colspan', endCol - startCol)
		);

		if (endCol < colCnt) {
			trEl.append('<td colspan="' + (colCnt - endCol) + '"/>');
		}

		this.bookendCells(trEl);

		return skeletonEl;
	}

});

;;

/* Event-rendering methods for the DayGrid class
----------------------------------------------------------------------------------------------------------------------*/

DayGrid.mixin({

	rowStructs: null, // an array of objects, each holding information about a row's foreground event-rendering


	// Unrenders all events currently rendered on the grid
	unrenderEvents: function() {
		this.removeSegPopover(); // removes the "more.." events popover
		Grid.prototype.unrenderEvents.apply(this, arguments); // calls the super-method
	},


	// Retrieves all rendered segment objects currently rendered on the grid
	getEventSegs: function() {
		return Grid.prototype.getEventSegs.call(this) // get the segments from the super-method
			.concat(this.popoverSegs || []); // append the segments from the "more..." popover
	},


	// Renders the given background event segments onto the grid
	renderBgSegs: function(segs) {

		// don't render timed background events
		var allDaySegs = $.grep(segs, function(seg) {
			return seg.event.allDay;
		});

		return Grid.prototype.renderBgSegs.call(this, allDaySegs); // call the super-method
	},


	// Renders the given foreground event segments onto the grid
	renderFgSegs: function(segs) {
		var rowStructs;

		// render an `.el` on each seg
		// returns a subset of the segs. segs that were actually rendered
		segs = this.renderFgSegEls(segs);

		rowStructs = this.rowStructs = this.renderSegRows(segs);

		// append to each row's content skeleton
		this.rowEls.each(function(i, rowNode) {
			$(rowNode).find('.fc-content-skeleton > table').append(
				rowStructs[i].tbodyEl
			);
		});

		return segs; // return only the segs that were actually rendered
	},


	// Unrenders all currently rendered foreground event segments
	unrenderFgSegs: function() {
		var rowStructs = this.rowStructs || [];
		var rowStruct;

		while ((rowStruct = rowStructs.pop())) {
			rowStruct.tbodyEl.remove();
		}

		this.rowStructs = null;
	},


	// Uses the given events array to generate <tbody> elements that should be appended to each row's content skeleton.
	// Returns an array of rowStruct objects (see the bottom of `renderSegRow`).
	// PRECONDITION: each segment shoud already have a rendered and assigned `.el`
	renderSegRows: function(segs) {
		var rowStructs = [];
		var segRows;
		var row;

		segRows = this.groupSegRows(segs); // group into nested arrays

		// iterate each row of segment groupings
		for (row = 0; row < segRows.length; row++) {
			rowStructs.push(
				this.renderSegRow(row, segRows[row])
			);
		}

		return rowStructs;
	},


	// Builds the HTML to be used for the default element for an individual segment
	fgSegHtml: function(seg, disableResizing) {
		var view = this.view;
		var event = seg.event;
		var isDraggable = view.isEventDraggable(event);
		var isResizableFromStart = !disableResizing && event.allDay &&
			seg.isStart && view.isEventResizableFromStart(event);
		var isResizableFromEnd = !disableResizing && event.allDay &&
			seg.isEnd && view.isEventResizableFromEnd(event);
		var classes = this.getSegClasses(seg, isDraggable, isResizableFromStart || isResizableFromEnd);
		var skinCss = cssToStr(this.getEventSkinCss(event));
		var timeHtml = '';
		var timeText;
		var titleHtml;

		classes.unshift('fc-day-grid-event', 'fc-h-event');

		// Only display a timed events time if it is the starting segment
		if (seg.isStart) {
			timeText = this.getEventTimeText(event);
			if (timeText) {
				timeHtml = '<span class="fc-time">' + htmlEscape(timeText) + '</span>';
			}
		}

		titleHtml =
			'<span class="fc-title">' +
				(htmlEscape(event.title || '') || '&nbsp;') + // we always want one line of height
			'</span>';
		
		return '<a class="' + classes.join(' ') + '"' +
				(event.url ?
					' href="' + htmlEscape(event.url) + '"' :
					''
					) +
				(skinCss ?
					' style="' + skinCss + '"' :
					''
					) +
			'>' +
				'<div class="fc-content">' +
					(this.isRTL ?
						titleHtml + ' ' + timeHtml : // put a natural space in between
						timeHtml + ' ' + titleHtml   //
						) +
				'</div>' +
				(isResizableFromStart ?
					'<div class="fc-resizer fc-start-resizer" />' :
					''
					) +
				(isResizableFromEnd ?
					'<div class="fc-resizer fc-end-resizer" />' :
					''
					) +
			'</a>';
	},


	// Given a row # and an array of segments all in the same row, render a <tbody> element, a skeleton that contains
	// the segments. Returns object with a bunch of internal data about how the render was calculated.
	// NOTE: modifies rowSegs
	renderSegRow: function(row, rowSegs) {
		var colCnt = this.colCnt;
		var segLevels = this.buildSegLevels(rowSegs); // group into sub-arrays of levels
		var levelCnt = Math.max(1, segLevels.length); // ensure at least one level
		var tbody = $('<tbody/>');
		var segMatrix = []; // lookup for which segments are rendered into which level+col cells
		var cellMatrix = []; // lookup for all <td> elements of the level+col matrix
		var loneCellMatrix = []; // lookup for <td> elements that only take up a single column
		var i, levelSegs;
		var col;
		var tr;
		var j, seg;
		var td;

		// populates empty cells from the current column (`col`) to `endCol`
		function emptyCellsUntil(endCol) {
			while (col < endCol) {
				// try to grab a cell from the level above and extend its rowspan. otherwise, create a fresh cell
				td = (loneCellMatrix[i - 1] || [])[col];
				if (td) {
					td.attr(
						'rowspan',
						parseInt(td.attr('rowspan') || 1, 10) + 1
					);
				}
				else {
					td = $('<td/>');
					tr.append(td);
				}
				cellMatrix[i][col] = td;
				loneCellMatrix[i][col] = td;
				col++;
			}
		}

		for (i = 0; i < levelCnt; i++) { // iterate through all levels
			levelSegs = segLevels[i];
			col = 0;
			tr = $('<tr/>');

			segMatrix.push([]);
			cellMatrix.push([]);
			loneCellMatrix.push([]);

			// levelCnt might be 1 even though there are no actual levels. protect against this.
			// this single empty row is useful for styling.
			if (levelSegs) {
				for (j = 0; j < levelSegs.length; j++) { // iterate through segments in level
					seg = levelSegs[j];

					emptyCellsUntil(seg.leftCol);

					// create a container that occupies or more columns. append the event element.
					td = $('<td class="fc-event-container"/>').append(seg.el);
					if (seg.leftCol != seg.rightCol) {
						td.attr('colspan', seg.rightCol - seg.leftCol + 1);
					}
					else { // a single-column segment
						loneCellMatrix[i][col] = td;
					}

					while (col <= seg.rightCol) {
						cellMatrix[i][col] = td;
						segMatrix[i][col] = seg;
						col++;
					}

					tr.append(td);
				}
			}

			emptyCellsUntil(colCnt); // finish off the row
			this.bookendCells(tr);
			tbody.append(tr);
		}

		return { // a "rowStruct"
			row: row, // the row number
			tbodyEl: tbody,
			cellMatrix: cellMatrix,
			segMatrix: segMatrix,
			segLevels: segLevels,
			segs: rowSegs
		};
	},


	// Stacks a flat array of segments, which are all assumed to be in the same row, into subarrays of vertical levels.
	// NOTE: modifies segs
	buildSegLevels: function(segs) {
		var levels = [];
		var i, seg;
		var j;

		// Give preference to elements with certain criteria, so they have
		// a chance to be closer to the top.
		this.sortEventSegs(segs);
		
		for (i = 0; i < segs.length; i++) {
			seg = segs[i];

			// loop through levels, starting with the topmost, until the segment doesn't collide with other segments
			for (j = 0; j < levels.length; j++) {
				if (!isDaySegCollision(seg, levels[j])) {
					break;
				}
			}
			// `j` now holds the desired subrow index
			seg.level = j;

			// create new level array if needed and append segment
			(levels[j] || (levels[j] = [])).push(seg);
		}

		// order segments left-to-right. very important if calendar is RTL
		for (j = 0; j < levels.length; j++) {
			levels[j].sort(compareDaySegCols);
		}

		return levels;
	},


	// Given a flat array of segments, return an array of sub-arrays, grouped by each segment's row
	groupSegRows: function(segs) {
		var segRows = [];
		var i;

		for (i = 0; i < this.rowCnt; i++) {
			segRows.push([]);
		}

		for (i = 0; i < segs.length; i++) {
			segRows[segs[i].row].push(segs[i]);
		}

		return segRows;
	}

});


// Computes whether two segments' columns collide. They are assumed to be in the same row.
function isDaySegCollision(seg, otherSegs) {
	var i, otherSeg;

	for (i = 0; i < otherSegs.length; i++) {
		otherSeg = otherSegs[i];

		if (
			otherSeg.leftCol <= seg.rightCol &&
			otherSeg.rightCol >= seg.leftCol
		) {
			return true;
		}
	}

	return false;
}


// A cmp function for determining the leftmost event
function compareDaySegCols(a, b) {
	return a.leftCol - b.leftCol;
}

;;

/* Methods relate to limiting the number events for a given day on a DayGrid
----------------------------------------------------------------------------------------------------------------------*/
// NOTE: all the segs being passed around in here are foreground segs

DayGrid.mixin({

	segPopover: null, // the Popover that holds events that can't fit in a cell. null when not visible
	popoverSegs: null, // an array of segment objects that the segPopover holds. null when not visible


	removeSegPopover: function() {
		if (this.segPopover) {
			this.segPopover.hide(); // in handler, will call segPopover's removeElement
		}
	},


	// Limits the number of "levels" (vertically stacking layers of events) for each row of the grid.
	// `levelLimit` can be false (don't limit), a number, or true (should be computed).
	limitRows: function(levelLimit) {
		var rowStructs = this.rowStructs || [];
		var row; // row #
		var rowLevelLimit;

		for (row = 0; row < rowStructs.length; row++) {
			this.unlimitRow(row);

			if (!levelLimit) {
				rowLevelLimit = false;
			}
			else if (typeof levelLimit === 'number') {
				rowLevelLimit = levelLimit;
			}
			else {
				rowLevelLimit = this.computeRowLevelLimit(row);
			}

			if (rowLevelLimit !== false) {
				this.limitRow(row, rowLevelLimit);
			}
		}
	},


	// Computes the number of levels a row will accomodate without going outside its bounds.
	// Assumes the row is "rigid" (maintains a constant height regardless of what is inside).
	// `row` is the row number.
	computeRowLevelLimit: function(row) {
		var rowEl = this.rowEls.eq(row); // the containing "fake" row div
		var rowHeight = rowEl.height(); // TODO: cache somehow?
		var trEls = this.rowStructs[row].tbodyEl.children();
		var i, trEl;
		var trHeight;

		function iterInnerHeights(i, childNode) {
			trHeight = Math.max(trHeight, $(childNode).outerHeight());
		}

		// Reveal one level <tr> at a time and stop when we find one out of bounds
		for (i = 0; i < trEls.length; i++) {
			trEl = trEls.eq(i).removeClass('fc-limited'); // reset to original state (reveal)

			// with rowspans>1 and IE8, trEl.outerHeight() would return the height of the largest cell,
			// so instead, find the tallest inner content element.
			trHeight = 0;
			trEl.find('> td > :first-child').each(iterInnerHeights);

			if (trEl.position().top + trHeight > rowHeight) {
				return i;
			}
		}

		return false; // should not limit at all
	},


	// Limits the given grid row to the maximum number of levels and injects "more" links if necessary.
	// `row` is the row number.
	// `levelLimit` is a number for the maximum (inclusive) number of levels allowed.
	limitRow: function(row, levelLimit) {
		var _this = this;
		var rowStruct = this.rowStructs[row];
		var moreNodes = []; // array of "more" <a> links and <td> DOM nodes
		var col = 0; // col #, left-to-right (not chronologically)
		var levelSegs; // array of segment objects in the last allowable level, ordered left-to-right
		var cellMatrix; // a matrix (by level, then column) of all <td> jQuery elements in the row
		var limitedNodes; // array of temporarily hidden level <tr> and segment <td> DOM nodes
		var i, seg;
		var segsBelow; // array of segment objects below `seg` in the current `col`
		var totalSegsBelow; // total number of segments below `seg` in any of the columns `seg` occupies
		var colSegsBelow; // array of segment arrays, below seg, one for each column (offset from segs's first column)
		var td, rowspan;
		var segMoreNodes; // array of "more" <td> cells that will stand-in for the current seg's cell
		var j;
		var moreTd, moreWrap, moreLink;

		// Iterates through empty level cells and places "more" links inside if need be
		function emptyCellsUntil(endCol) { // goes from current `col` to `endCol`
			while (col < endCol) {
				segsBelow = _this.getCellSegs(row, col, levelLimit);
				if (segsBelow.length) {
					td = cellMatrix[levelLimit - 1][col];
					moreLink = _this.renderMoreLink(row, col, segsBelow);
					moreWrap = $('<div/>').append(moreLink);
					td.append(moreWrap);
					moreNodes.push(moreWrap[0]);
				}
				col++;
			}
		}

		if (levelLimit && levelLimit < rowStruct.segLevels.length) { // is it actually over the limit?
			levelSegs = rowStruct.segLevels[levelLimit - 1];
			cellMatrix = rowStruct.cellMatrix;

			limitedNodes = rowStruct.tbodyEl.children().slice(levelLimit) // get level <tr> elements past the limit
				.addClass('fc-limited').get(); // hide elements and get a simple DOM-nodes array

			// iterate though segments in the last allowable level
			for (i = 0; i < levelSegs.length; i++) {
				seg = levelSegs[i];
				emptyCellsUntil(seg.leftCol); // process empty cells before the segment

				// determine *all* segments below `seg` that occupy the same columns
				colSegsBelow = [];
				totalSegsBelow = 0;
				while (col <= seg.rightCol) {
					segsBelow = this.getCellSegs(row, col, levelLimit);
					colSegsBelow.push(segsBelow);
					totalSegsBelow += segsBelow.length;
					col++;
				}

				if (totalSegsBelow) { // do we need to replace this segment with one or many "more" links?
					td = cellMatrix[levelLimit - 1][seg.leftCol]; // the segment's parent cell
					rowspan = td.attr('rowspan') || 1;
					segMoreNodes = [];

					// make a replacement <td> for each column the segment occupies. will be one for each colspan
					for (j = 0; j < colSegsBelow.length; j++) {
						moreTd = $('<td class="fc-more-cell"/>').attr('rowspan', rowspan);
						segsBelow = colSegsBelow[j];
						moreLink = this.renderMoreLink(
							row,
							seg.leftCol + j,
							[ seg ].concat(segsBelow) // count seg as hidden too
						);
						moreWrap = $('<div/>').append(moreLink);
						moreTd.append(moreWrap);
						segMoreNodes.push(moreTd[0]);
						moreNodes.push(moreTd[0]);
					}

					td.addClass('fc-limited').after($(segMoreNodes)); // hide original <td> and inject replacements
					limitedNodes.push(td[0]);
				}
			}

			emptyCellsUntil(this.colCnt); // finish off the level
			rowStruct.moreEls = $(moreNodes); // for easy undoing later
			rowStruct.limitedEls = $(limitedNodes); // for easy undoing later
		}
	},


	// Reveals all levels and removes all "more"-related elements for a grid's row.
	// `row` is a row number.
	unlimitRow: function(row) {
		var rowStruct = this.rowStructs[row];

		if (rowStruct.moreEls) {
			rowStruct.moreEls.remove();
			rowStruct.moreEls = null;
		}

		if (rowStruct.limitedEls) {
			rowStruct.limitedEls.removeClass('fc-limited');
			rowStruct.limitedEls = null;
		}
	},


	// Renders an <a> element that represents hidden event element for a cell.
	// Responsible for attaching click handler as well.
	renderMoreLink: function(row, col, hiddenSegs) {
		var _this = this;
		var view = this.view;

		return $('<a class="fc-more"/>')
			.text(
				this.getMoreLinkText(hiddenSegs.length)
			)
			.on('click', function(ev) {
				var clickOption = view.opt('eventLimitClick');
				var date = _this.getCellDate(row, col);
				var moreEl = $(this);
				var dayEl = _this.getCellEl(row, col);
				var allSegs = _this.getCellSegs(row, col);

				// rescope the segments to be within the cell's date
				var reslicedAllSegs = _this.resliceDaySegs(allSegs, date);
				var reslicedHiddenSegs = _this.resliceDaySegs(hiddenSegs, date);

				if (typeof clickOption === 'function') {
					// the returned value can be an atomic option
					clickOption = view.trigger('eventLimitClick', null, {
						date: date,
						dayEl: dayEl,
						moreEl: moreEl,
						segs: reslicedAllSegs,
						hiddenSegs: reslicedHiddenSegs
					}, ev);
				}

				if (clickOption === 'popover') {
					_this.showSegPopover(row, col, moreEl, reslicedAllSegs);
				}
				else if (typeof clickOption === 'string') { // a view name
					view.calendar.zoomTo(date, clickOption);
				}
			});
	},


	// Reveals the popover that displays all events within a cell
	showSegPopover: function(row, col, moreLink, segs) {
		var _this = this;
		var view = this.view;
		var moreWrap = moreLink.parent(); // the <div> wrapper around the <a>
		var topEl; // the element we want to match the top coordinate of
		var options;

		if (this.rowCnt == 1) {
			topEl = view.el; // will cause the popover to cover any sort of header
		}
		else {
			topEl = this.rowEls.eq(row); // will align with top of row
		}

		options = {
			className: 'fc-more-popover',
			content: this.renderSegPopoverContent(row, col, segs),
			parentEl: this.el,
			top: topEl.offset().top,
			autoHide: true, // when the user clicks elsewhere, hide the popover
			viewportConstrain: view.opt('popoverViewportConstrain'),
			hide: function() {
				// kill everything when the popover is hidden
				_this.segPopover.removeElement();
				_this.segPopover = null;
				_this.popoverSegs = null;
			}
		};

		// Determine horizontal coordinate.
		// We use the moreWrap instead of the <td> to avoid border confusion.
		if (this.isRTL) {
			options.right = moreWrap.offset().left + moreWrap.outerWidth() + 1; // +1 to be over cell border
		}
		else {
			options.left = moreWrap.offset().left - 1; // -1 to be over cell border
		}

		this.segPopover = new Popover(options);
		this.segPopover.show();
	},


	// Builds the inner DOM contents of the segment popover
	renderSegPopoverContent: function(row, col, segs) {
		var view = this.view;
		var isTheme = view.opt('theme');
		var title = this.getCellDate(row, col).format(view.opt('dayPopoverFormat'));
		var content = $(
			'<div class="fc-header ' + view.widgetHeaderClass + '">' +
				'<span class="fc-close ' +
					(isTheme ? 'ui-icon ui-icon-closethick' : 'fc-icon fc-icon-x') +
				'"></span>' +
				'<span class="fc-title">' +
					htmlEscape(title) +
				'</span>' +
				'<div class="fc-clear"/>' +
			'</div>' +
			'<div class="fc-body ' + view.widgetContentClass + '">' +
				'<div class="fc-event-container"></div>' +
			'</div>'
		);
		var segContainer = content.find('.fc-event-container');
		var i;

		// render each seg's `el` and only return the visible segs
		segs = this.renderFgSegEls(segs, true); // disableResizing=true
		this.popoverSegs = segs;

		for (i = 0; i < segs.length; i++) {

			// because segments in the popover are not part of a grid coordinate system, provide a hint to any
			// grids that want to do drag-n-drop about which cell it came from
			this.prepareHits();
			segs[i].hit = this.getCellHit(row, col);
			this.releaseHits();

			segContainer.append(segs[i].el);
		}

		return content;
	},


	// Given the events within an array of segment objects, reslice them to be in a single day
	resliceDaySegs: function(segs, dayDate) {

		// build an array of the original events
		var events = $.map(segs, function(seg) {
			return seg.event;
		});

		var dayStart = dayDate.clone();
		var dayEnd = dayStart.clone().add(1, 'days');
		var dayRange = { start: dayStart, end: dayEnd };

		// slice the events with a custom slicing function
		segs = this.eventsToSegs(
			events,
			function(range) {
				var seg = intersectRanges(range, dayRange); // undefind if no intersection
				return seg ? [ seg ] : []; // must return an array of segments
			}
		);

		// force an order because eventsToSegs doesn't guarantee one
		this.sortEventSegs(segs);

		return segs;
	},


	// Generates the text that should be inside a "more" link, given the number of events it represents
	getMoreLinkText: function(num) {
		var opt = this.view.opt('eventLimitText');

		if (typeof opt === 'function') {
			return opt(num);
		}
		else {
			return '+' + num + ' ' + opt;
		}
	},


	// Returns segments within a given cell.
	// If `startLevel` is specified, returns only events including and below that level. Otherwise returns all segs.
	getCellSegs: function(row, col, startLevel) {
		var segMatrix = this.rowStructs[row].segMatrix;
		var level = startLevel || 0;
		var segs = [];
		var seg;

		while (level < segMatrix.length) {
			seg = segMatrix[level][col];
			if (seg) {
				segs.push(seg);
			}
			level++;
		}

		return segs;
	}

});

;;

/* A component that renders one or more columns of vertical time slots
----------------------------------------------------------------------------------------------------------------------*/
// We mixin DayTable, even though there is only a single row of days

var TimeGrid = FC.TimeGrid = Grid.extend(DayTableMixin, {

	slotDuration: null, // duration of a "slot", a distinct time segment on given day, visualized by lines
	snapDuration: null, // granularity of time for dragging and selecting
	snapsPerSlot: null,
	minTime: null, // Duration object that denotes the first visible time of any given day
	maxTime: null, // Duration object that denotes the exclusive visible end time of any given day
	labelFormat: null, // formatting string for times running along vertical axis
	labelInterval: null, // duration of how often a label should be displayed for a slot

	colEls: null, // cells elements in the day-row background
	slatEls: null, // elements running horizontally across all columns
	nowIndicatorEls: null,

	colCoordCache: null,
	slatCoordCache: null,


	constructor: function() {
		Grid.apply(this, arguments); // call the super-constructor

		this.processOptions();
	},


	// Renders the time grid into `this.el`, which should already be assigned.
	// Relies on the view's colCnt. In the future, this component should probably be self-sufficient.
	renderDates: function() {
		this.el.html(this.renderHtml());
		this.colEls = this.el.find('.fc-day');
		this.slatEls = this.el.find('.fc-slats tr');

		this.colCoordCache = new CoordCache({
			els: this.colEls,
			isHorizontal: true
		});
		this.slatCoordCache = new CoordCache({
			els: this.slatEls,
			isVertical: true
		});

		this.renderContentSkeleton();
	},


	// Renders the basic HTML skeleton for the grid
	renderHtml: function() {
		return '' +
			'<div class="fc-bg">' +
				'<table>' +
					this.renderBgTrHtml(0) + // row=0
				'</table>' +
			'</div>' +
			'<div class="fc-slats">' +
				'<table>' +
					this.renderSlatRowHtml() +
				'</table>' +
			'</div>';
	},


	// Generates the HTML for the horizontal "slats" that run width-wise. Has a time axis on a side. Depends on RTL.
	renderSlatRowHtml: function() {
		var view = this.view;
		var isRTL = this.isRTL;
		var html = '';
		var slotTime = moment.duration(+this.minTime); // wish there was .clone() for durations
		var slotDate; // will be on the view's first day, but we only care about its time
		var isLabeled;
		var axisHtml;

		// Calculate the time for each slot
		while (slotTime < this.maxTime) {
			slotDate = this.start.clone().time(slotTime);
			isLabeled = isInt(divideDurationByDuration(slotTime, this.labelInterval));

			axisHtml =
				'<td class="fc-axis fc-time ' + view.widgetContentClass + '" ' + view.axisStyleAttr() + '>' +
					(isLabeled ?
						'<span>' + // for matchCellWidths
							htmlEscape(slotDate.format(this.labelFormat)) +
						'</span>' :
						''
						) +
				'</td>';

			html +=
				'<tr data-time="' + slotDate.format('HH:mm:ss') + '"' +
					(isLabeled ? '' : ' class="fc-minor"') +
					'>' +
					(!isRTL ? axisHtml : '') +
					'<td class="' + view.widgetContentClass + '"/>' +
					(isRTL ? axisHtml : '') +
				"</tr>";

			slotTime.add(this.slotDuration);
		}

		return html;
	},


	/* Options
	------------------------------------------------------------------------------------------------------------------*/


	// Parses various options into properties of this object
	processOptions: function() {
		var view = this.view;
		var slotDuration = view.opt('slotDuration');
		var snapDuration = view.opt('snapDuration');
		var input;

		slotDuration = moment.duration(slotDuration);
		snapDuration = snapDuration ? moment.duration(snapDuration) : slotDuration;

		this.slotDuration = slotDuration;
		this.snapDuration = snapDuration;
		this.snapsPerSlot = slotDuration / snapDuration; // TODO: ensure an integer multiple?

		this.minResizeDuration = snapDuration; // hack

		this.minTime = moment.duration(view.opt('minTime'));
		this.maxTime = moment.duration(view.opt('maxTime'));

		// might be an array value (for TimelineView).
		// if so, getting the most granular entry (the last one probably).
		input = view.opt('slotLabelFormat');
		if ($.isArray(input)) {
			input = input[input.length - 1];
		}

		this.labelFormat =
			input ||
			view.opt('axisFormat') || // deprecated
			view.opt('smallTimeFormat'); // the computed default

		input = view.opt('slotLabelInterval');
		this.labelInterval = input ?
			moment.duration(input) :
			this.computeLabelInterval(slotDuration);
	},


	// Computes an automatic value for slotLabelInterval
	computeLabelInterval: function(slotDuration) {
		var i;
		var labelInterval;
		var slotsPerLabel;

		// find the smallest stock label interval that results in more than one slots-per-label
		for (i = AGENDA_STOCK_SUB_DURATIONS.length - 1; i >= 0; i--) {
			labelInterval = moment.duration(AGENDA_STOCK_SUB_DURATIONS[i]);
			slotsPerLabel = divideDurationByDuration(labelInterval, slotDuration);
			if (isInt(slotsPerLabel) && slotsPerLabel > 1) {
				return labelInterval;
			}
		}

		return moment.duration(slotDuration); // fall back. clone
	},


	// Computes a default event time formatting string if `timeFormat` is not explicitly defined
	computeEventTimeFormat: function() {
		return this.view.opt('noMeridiemTimeFormat'); // like "6:30" (no AM/PM)
	},


	// Computes a default `displayEventEnd` value if one is not expliclty defined
	computeDisplayEventEnd: function() {
		return true;
	},


	/* Hit System
	------------------------------------------------------------------------------------------------------------------*/


	prepareHits: function() {
		this.colCoordCache.build();
		this.slatCoordCache.build();
	},


	releaseHits: function() {
		this.colCoordCache.clear();
		// NOTE: don't clear slatCoordCache because we rely on it for computeTimeTop
	},


	queryHit: function(leftOffset, topOffset) {
		var snapsPerSlot = this.snapsPerSlot;
		var colCoordCache = this.colCoordCache;
		var slatCoordCache = this.slatCoordCache;
		var colIndex = colCoordCache.getHorizontalIndex(leftOffset);
		var slatIndex = slatCoordCache.getVerticalIndex(topOffset);

		if (colIndex != null && slatIndex != null) {
			var slatTop = slatCoordCache.getTopOffset(slatIndex);
			var slatHeight = slatCoordCache.getHeight(slatIndex);
			var partial = (topOffset - slatTop) / slatHeight; // floating point number between 0 and 1
			var localSnapIndex = Math.floor(partial * snapsPerSlot); // the snap # relative to start of slat
			var snapIndex = slatIndex * snapsPerSlot + localSnapIndex;
			var snapTop = slatTop + (localSnapIndex / snapsPerSlot) * slatHeight;
			var snapBottom = slatTop + ((localSnapIndex + 1) / snapsPerSlot) * slatHeight;

			return {
				col: colIndex,
				snap: snapIndex,
				component: this, // needed unfortunately :(
				left: colCoordCache.getLeftOffset(colIndex),
				right: colCoordCache.getRightOffset(colIndex),
				top: snapTop,
				bottom: snapBottom
			};
		}
	},


	getHitSpan: function(hit) {
		var start = this.getCellDate(0, hit.col); // row=0
		var time = this.computeSnapTime(hit.snap); // pass in the snap-index
		var end;

		start.time(time);
		end = start.clone().add(this.snapDuration);

		return { start: start, end: end };
	},


	getHitEl: function(hit) {
		return this.colEls.eq(hit.col);
	},


	/* Dates
	------------------------------------------------------------------------------------------------------------------*/


	rangeUpdated: function() {
		this.updateDayTable();
	},


	// Given a row number of the grid, representing a "snap", returns a time (Duration) from its start-of-day
	computeSnapTime: function(snapIndex) {
		return moment.duration(this.minTime + this.snapDuration * snapIndex);
	},


	// Slices up the given span (unzoned start/end with other misc data) into an array of segments
	spanToSegs: function(span) {
		var segs = this.sliceRangeByTimes(span);
		var i;

		for (i = 0; i < segs.length; i++) {
			if (this.isRTL) {
				segs[i].col = this.daysPerRow - 1 - segs[i].dayIndex;
			}
			else {
				segs[i].col = segs[i].dayIndex;
			}
		}

		return segs;
	},


	sliceRangeByTimes: function(range) {
		var segs = [];
		var seg;
		var dayIndex;
		var dayDate;
		var dayRange;

		for (dayIndex = 0; dayIndex < this.daysPerRow; dayIndex++) {
			dayDate = this.dayDates[dayIndex].clone(); // TODO: better API for this?
			dayRange = {
				start: dayDate.clone().time(this.minTime),
				end: dayDate.clone().time(this.maxTime)
			};
			seg = intersectRanges(range, dayRange); // both will be ambig timezone
			if (seg) {
				seg.dayIndex = dayIndex;
				segs.push(seg);
			}
		}

		return segs;
	},


	/* Coordinates
	------------------------------------------------------------------------------------------------------------------*/


	updateSize: function(isResize) { // NOT a standard Grid method
		this.slatCoordCache.build();

		if (isResize) {
			this.updateSegVerticals(
				[].concat(this.fgSegs || [], this.bgSegs || [], this.businessSegs || [])
			);
		}
	},


	// Computes the top coordinate, relative to the bounds of the grid, of the given date.
	// A `startOfDayDate` must be given for avoiding ambiguity over how to treat midnight.
	computeDateTop: function(date, startOfDayDate) {
		return this.computeTimeTop(
			moment.duration(
				date - startOfDayDate.clone().stripTime()
			)
		);
	},


	// Computes the top coordinate, relative to the bounds of the grid, of the given time (a Duration).
	computeTimeTop: function(time) {
		var len = this.slatEls.length;
		var slatCoverage = (time - this.minTime) / this.slotDuration; // floating-point value of # of slots covered
		var slatIndex;
		var slatRemainder;

		// compute a floating-point number for how many slats should be progressed through.
		// from 0 to number of slats (inclusive)
		// constrained because minTime/maxTime might be customized.
		slatCoverage = Math.max(0, slatCoverage);
		slatCoverage = Math.min(len, slatCoverage);

		// an integer index of the furthest whole slat
		// from 0 to number slats (*exclusive*, so len-1)
		slatIndex = Math.floor(slatCoverage);
		slatIndex = Math.min(slatIndex, len - 1);

		// how much further through the slatIndex slat (from 0.0-1.0) must be covered in addition.
		// could be 1.0 if slatCoverage is covering *all* the slots
		slatRemainder = slatCoverage - slatIndex;

		return this.slatCoordCache.getTopPosition(slatIndex) +
			this.slatCoordCache.getHeight(slatIndex) * slatRemainder;
	},



	/* Event Drag Visualization
	------------------------------------------------------------------------------------------------------------------*/


	// Renders a visual indication of an event being dragged over the specified date(s).
	// A returned value of `true` signals that a mock "helper" event has been rendered.
	renderDrag: function(eventLocation, seg) {

		if (seg) { // if there is event information for this drag, render a helper event
			this.renderEventLocationHelper(eventLocation, seg);

			for (var i = 0; i < this.helperSegs.length; i++) {
				this.applyDragOpacity(this.helperSegs[i].el);
			}

			return true; // signal that a helper has been rendered
		}
		else {
			// otherwise, just render a highlight
			this.renderHighlight(this.eventToSpan(eventLocation));
		}
	},


	// Unrenders any visual indication of an event being dragged
	unrenderDrag: function() {
		this.unrenderHelper();
		this.unrenderHighlight();
	},


	/* Event Resize Visualization
	------------------------------------------------------------------------------------------------------------------*/


	// Renders a visual indication of an event being resized
	renderEventResize: function(eventLocation, seg) {
		this.renderEventLocationHelper(eventLocation, seg);
	},


	// Unrenders any visual indication of an event being resized
	unrenderEventResize: function() {
		this.unrenderHelper();
	},


	/* Event Helper
	------------------------------------------------------------------------------------------------------------------*/


	// Renders a mock "helper" event. `sourceSeg` is the original segment object and might be null (an external drag)
	renderHelper: function(event, sourceSeg) {
		this.renderHelperSegs(this.eventToSegs(event), sourceSeg);
	},


	// Unrenders any mock helper event
	unrenderHelper: function() {
		this.unrenderHelperSegs();
	},


	/* Business Hours
	------------------------------------------------------------------------------------------------------------------*/


	renderBusinessHours: function() {
		var events = this.view.calendar.getBusinessHoursEvents();
		var segs = this.eventsToSegs(events);

		this.renderBusinessSegs(segs);
	},


	unrenderBusinessHours: function() {
		this.unrenderBusinessSegs();
	},


	/* Now Indicator
	------------------------------------------------------------------------------------------------------------------*/


	getNowIndicatorUnit: function() {
		return 'minute'; // will refresh on the minute
	},


	renderNowIndicator: function(date) {
		// seg system might be overkill, but it handles scenario where line needs to be rendered
		//  more than once because of columns with the same date (resources columns for example)
		var segs = this.spanToSegs({ start: date, end: date });
		var top = this.computeDateTop(date, date);
		var nodes = [];
		var i;

		// render lines within the columns
		for (i = 0; i < segs.length; i++) {
			nodes.push($('<div class="fc-now-indicator fc-now-indicator-line"></div>')
				.css('top', top)
				.appendTo(this.colContainerEls.eq(segs[i].col))[0]);
		}

		// render an arrow over the axis
		if (segs.length > 0) { // is the current time in view?
			nodes.push($('<div class="fc-now-indicator fc-now-indicator-arrow"></div>')
				.css('top', top)
				.appendTo(this.el.find('.fc-content-skeleton'))[0]);
		}

		this.nowIndicatorEls = $(nodes);
	},


	unrenderNowIndicator: function() {
		if (this.nowIndicatorEls) {
			this.nowIndicatorEls.remove();
			this.nowIndicatorEls = null;
		}
	},


	/* Selection
	------------------------------------------------------------------------------------------------------------------*/


	// Renders a visual indication of a selection. Overrides the default, which was to simply render a highlight.
	renderSelection: function(span) {
		if (this.view.opt('selectHelper')) { // this setting signals that a mock helper event should be rendered

			// normally acceps an eventLocation, span has a start/end, which is good enough
			this.renderEventLocationHelper(span);
		}
		else {
			this.renderHighlight(span);
		}
	},


	// Unrenders any visual indication of a selection
	unrenderSelection: function() {
		this.unrenderHelper();
		this.unrenderHighlight();
	},


	/* Highlight
	------------------------------------------------------------------------------------------------------------------*/


	renderHighlight: function(span) {
		this.renderHighlightSegs(this.spanToSegs(span));
	},


	unrenderHighlight: function() {
		this.unrenderHighlightSegs();
	}

});

;;

/* Methods for rendering SEGMENTS, pieces of content that live on the view
 ( this file is no longer just for events )
----------------------------------------------------------------------------------------------------------------------*/

TimeGrid.mixin({

	colContainerEls: null, // containers for each column

	// inner-containers for each column where different types of segs live
	fgContainerEls: null,
	bgContainerEls: null,
	helperContainerEls: null,
	highlightContainerEls: null,
	businessContainerEls: null,

	// arrays of different types of displayed segments
	fgSegs: null,
	bgSegs: null,
	helperSegs: null,
	highlightSegs: null,
	businessSegs: null,


	// Renders the DOM that the view's content will live in
	renderContentSkeleton: function() {
		var cellHtml = '';
		var i;
		var skeletonEl;

		for (i = 0; i < this.colCnt; i++) {
			cellHtml +=
				'<td>' +
					'<div class="fc-content-col">' +
						'<div class="fc-event-container fc-helper-container"></div>' +
						'<div class="fc-event-container"></div>' +
						'<div class="fc-highlight-container"></div>' +
						'<div class="fc-bgevent-container"></div>' +
						'<div class="fc-business-container"></div>' +
					'</div>' +
				'</td>';
		}

		skeletonEl = $(
			'<div class="fc-content-skeleton">' +
				'<table>' +
					'<tr>' + cellHtml + '</tr>' +
				'</table>' +
			'</div>'
		);

		this.colContainerEls = skeletonEl.find('.fc-content-col');
		this.helperContainerEls = skeletonEl.find('.fc-helper-container');
		this.fgContainerEls = skeletonEl.find('.fc-event-container:not(.fc-helper-container)');
		this.bgContainerEls = skeletonEl.find('.fc-bgevent-container');
		this.highlightContainerEls = skeletonEl.find('.fc-highlight-container');
		this.businessContainerEls = skeletonEl.find('.fc-business-container');

		this.bookendCells(skeletonEl.find('tr')); // TODO: do this on string level
		this.el.append(skeletonEl);
	},


	/* Foreground Events
	------------------------------------------------------------------------------------------------------------------*/


	renderFgSegs: function(segs) {
		segs = this.renderFgSegsIntoContainers(segs, this.fgContainerEls);
		this.fgSegs = segs;
		return segs; // needed for Grid::renderEvents
	},


	unrenderFgSegs: function() {
		this.unrenderNamedSegs('fgSegs');
	},


	/* Foreground Helper Events
	------------------------------------------------------------------------------------------------------------------*/


	renderHelperSegs: function(segs, sourceSeg) {
		var i, seg;
		var sourceEl;

		segs = this.renderFgSegsIntoContainers(segs, this.helperContainerEls);

		// Try to make the segment that is in the same row as sourceSeg look the same
		for (i = 0; i < segs.length; i++) {
			seg = segs[i];
			if (sourceSeg && sourceSeg.col === seg.col) {
				sourceEl = sourceSeg.el;
				seg.el.css({
					left: sourceEl.css('left'),
					right: sourceEl.css('right'),
					'margin-left': sourceEl.css('margin-left'),
					'margin-right': sourceEl.css('margin-right')
				});
			}
		}

		this.helperSegs = segs;
	},


	unrenderHelperSegs: function() {
		this.unrenderNamedSegs('helperSegs');
	},


	/* Background Events
	------------------------------------------------------------------------------------------------------------------*/


	renderBgSegs: function(segs) {
		segs = this.renderFillSegEls('bgEvent', segs); // TODO: old fill system
		this.updateSegVerticals(segs);
		this.attachSegsByCol(this.groupSegsByCol(segs), this.bgContainerEls);
		this.bgSegs = segs;
		return segs; // needed for Grid::renderEvents
	},


	unrenderBgSegs: function() {
		this.unrenderNamedSegs('bgSegs');
	},


	/* Highlight
	------------------------------------------------------------------------------------------------------------------*/


	renderHighlightSegs: function(segs) {
		segs = this.renderFillSegEls('highlight', segs); // TODO: old fill system
		this.updateSegVerticals(segs);
		this.attachSegsByCol(this.groupSegsByCol(segs), this.highlightContainerEls);
		this.highlightSegs = segs;
	},


	unrenderHighlightSegs: function() {
		this.unrenderNamedSegs('highlightSegs');
	},


	/* Business Hours
	------------------------------------------------------------------------------------------------------------------*/


	renderBusinessSegs: function(segs) {
		segs = this.renderFillSegEls('businessHours', segs); // TODO: old fill system
		this.updateSegVerticals(segs);
		this.attachSegsByCol(this.groupSegsByCol(segs), this.businessContainerEls);
		this.businessSegs = segs;
	},


	unrenderBusinessSegs: function() {
		this.unrenderNamedSegs('businessSegs');
	},


	/* Seg Rendering Utils
	------------------------------------------------------------------------------------------------------------------*/


	// Given a flat array of segments, return an array of sub-arrays, grouped by each segment's col
	groupSegsByCol: function(segs) {
		var segsByCol = [];
		var i;

		for (i = 0; i < this.colCnt; i++) {
			segsByCol.push([]);
		}

		for (i = 0; i < segs.length; i++) {
			segsByCol[segs[i].col].push(segs[i]);
		}

		return segsByCol;
	},


	// Given segments grouped by column, insert the segments' elements into a parallel array of container
	// elements, each living within a column.
	attachSegsByCol: function(segsByCol, containerEls) {
		var col;
		var segs;
		var i;

		for (col = 0; col < this.colCnt; col++) { // iterate each column grouping
			segs = segsByCol[col];

			for (i = 0; i < segs.length; i++) {
				containerEls.eq(col).append(segs[i].el);
			}
		}
	},


	// Given the name of a property of `this` object, assumed to be an array of segments,
	// loops through each segment and removes from DOM. Will null-out the property afterwards.
	unrenderNamedSegs: function(propName) {
		var segs = this[propName];
		var i;

		if (segs) {
			for (i = 0; i < segs.length; i++) {
				segs[i].el.remove();
			}
			this[propName] = null;
		}
	},



	/* Foreground Event Rendering Utils
	------------------------------------------------------------------------------------------------------------------*/


	// Given an array of foreground segments, render a DOM element for each, computes position,
	// and attaches to the column inner-container elements.
	renderFgSegsIntoContainers: function(segs, containerEls) {
		var segsByCol;
		var col;

		segs = this.renderFgSegEls(segs); // will call fgSegHtml
		segsByCol = this.groupSegsByCol(segs);

		for (col = 0; col < this.colCnt; col++) {
			this.updateFgSegCoords(segsByCol[col]);
		}

		this.attachSegsByCol(segsByCol, containerEls);

		return segs;
	},


	// Renders the HTML for a single event segment's default rendering
	fgSegHtml: function(seg, disableResizing) {
		var view = this.view;
		var event = seg.event;
		var isDraggable = view.isEventDraggable(event);
		var isResizableFromStart = !disableResizing && seg.isStart && view.isEventResizableFromStart(event);
		var isResizableFromEnd = !disableResizing && seg.isEnd && view.isEventResizableFromEnd(event);
		var classes = this.getSegClasses(seg, isDraggable, isResizableFromStart || isResizableFromEnd);
		var skinCss = cssToStr(this.getEventSkinCss(event));
		var timeText;
		var fullTimeText; // more verbose time text. for the print stylesheet
		var startTimeText; // just the start time text

		classes.unshift('fc-time-grid-event', 'fc-v-event');

		if (view.isMultiDayEvent(event)) { // if the event appears to span more than one day...
			// Don't display time text on segments that run entirely through a day.
			// That would appear as midnight-midnight and would look dumb.
			// Otherwise, display the time text for the *segment's* times (like 6pm-midnight or midnight-10am)
			if (seg.isStart || seg.isEnd) {
				timeText = this.getEventTimeText(seg);
				fullTimeText = this.getEventTimeText(seg, 'LT');
				startTimeText = this.getEventTimeText(seg, null, false); // displayEnd=false
			}
		} else {
			// Display the normal time text for the *event's* times
			timeText = this.getEventTimeText(event);
			fullTimeText = this.getEventTimeText(event, 'LT');
			startTimeText = this.getEventTimeText(event, null, false); // displayEnd=false
		}

		return '<a class="' + classes.join(' ') + '"' +
			(event.url ?
				' href="' + htmlEscape(event.url) + '"' :
				''
				) +
			(skinCss ?
				' style="' + skinCss + '"' :
				''
				) +
			'>' +
				'<div class="fc-content">' +
					(timeText ?
						'<div class="fc-time"' +
						' data-start="' + htmlEscape(startTimeText) + '"' +
						' data-full="' + htmlEscape(fullTimeText) + '"' +
						'>' +
							'<span>' + htmlEscape(timeText) + '</span>' +
						'</div>' :
						''
						) +
					(event.title ?
						'<div class="fc-title">' +
							htmlEscape(event.title) +
						'</div>' :
						''
						) +
				'</div>' +
				'<div class="fc-bg"/>' +
				/* TODO: write CSS for this
				(isResizableFromStart ?
					'<div class="fc-resizer fc-start-resizer" />' :
					''
					) +
				*/
				(isResizableFromEnd ?
					'<div class="fc-resizer fc-end-resizer" />' :
					''
					) +
			'</a>';
	},


	/* Seg Position Utils
	------------------------------------------------------------------------------------------------------------------*/


	// Refreshes the CSS top/bottom coordinates for each segment element.
	// Works when called after initial render, after a window resize/zoom for example.
	updateSegVerticals: function(segs) {
		this.computeSegVerticals(segs);
		this.assignSegVerticals(segs);
	},


	// For each segment in an array, computes and assigns its top and bottom properties
	computeSegVerticals: function(segs) {
		var i, seg;

		for (i = 0; i < segs.length; i++) {
			seg = segs[i];
			seg.top = this.computeDateTop(seg.start, seg.start);
			seg.bottom = this.computeDateTop(seg.end, seg.start);
		}
	},


	// Given segments that already have their top/bottom properties computed, applies those values to
	// the segments' elements.
	assignSegVerticals: function(segs) {
		var i, seg;

		for (i = 0; i < segs.length; i++) {
			seg = segs[i];
			seg.el.css(this.generateSegVerticalCss(seg));
		}
	},


	// Generates an object with CSS properties for the top/bottom coordinates of a segment element
	generateSegVerticalCss: function(seg) {
		return {
			top: seg.top,
			bottom: -seg.bottom // flipped because needs to be space beyond bottom edge of event container
		};
	},


	/* Foreground Event Positioning Utils
	------------------------------------------------------------------------------------------------------------------*/


	// Given segments that are assumed to all live in the *same column*,
	// compute their verical/horizontal coordinates and assign to their elements.
	updateFgSegCoords: function(segs) {
		this.computeSegVerticals(segs); // horizontals relies on this
		this.computeFgSegHorizontals(segs); // compute horizontal coordinates, z-index's, and reorder the array
		this.assignSegVerticals(segs);
		this.assignFgSegHorizontals(segs);
	},


	// Given an array of segments that are all in the same column, sets the backwardCoord and forwardCoord on each.
	// NOTE: Also reorders the given array by date!
	computeFgSegHorizontals: function(segs) {
		var levels;
		var level0;
		var i;

		this.sortEventSegs(segs); // order by certain criteria
		levels = buildSlotSegLevels(segs);
		computeForwardSlotSegs(levels);

		if ((level0 = levels[0])) {

			for (i = 0; i < level0.length; i++) {
				computeSlotSegPressures(level0[i]);
			}

			for (i = 0; i < level0.length; i++) {
				this.computeFgSegForwardBack(level0[i], 0, 0);
			}
		}
	},


	// Calculate seg.forwardCoord and seg.backwardCoord for the segment, where both values range
	// from 0 to 1. If the calendar is left-to-right, the seg.backwardCoord maps to "left" and
	// seg.forwardCoord maps to "right" (via percentage). Vice-versa if the calendar is right-to-left.
	//
	// The segment might be part of a "series", which means consecutive segments with the same pressure
	// who's width is unknown until an edge has been hit. `seriesBackwardPressure` is the number of
	// segments behind this one in the current series, and `seriesBackwardCoord` is the starting
	// coordinate of the first segment in the series.
	computeFgSegForwardBack: function(seg, seriesBackwardPressure, seriesBackwardCoord) {
		var forwardSegs = seg.forwardSegs;
		var i;

		if (seg.forwardCoord === undefined) { // not already computed

			if (!forwardSegs.length) {

				// if there are no forward segments, this segment should butt up against the edge
				seg.forwardCoord = 1;
			}
			else {

				// sort highest pressure first
				this.sortForwardSegs(forwardSegs);

				// this segment's forwardCoord will be calculated from the backwardCoord of the
				// highest-pressure forward segment.
				this.computeFgSegForwardBack(forwardSegs[0], seriesBackwardPressure + 1, seriesBackwardCoord);
				seg.forwardCoord = forwardSegs[0].backwardCoord;
			}

			// calculate the backwardCoord from the forwardCoord. consider the series
			seg.backwardCoord = seg.forwardCoord -
				(seg.forwardCoord - seriesBackwardCoord) / // available width for series
				(seriesBackwardPressure + 1); // # of segments in the series

			// use this segment's coordinates to computed the coordinates of the less-pressurized
			// forward segments
			for (i=0; i<forwardSegs.length; i++) {
				this.computeFgSegForwardBack(forwardSegs[i], 0, seg.forwardCoord);
			}
		}
	},


	sortForwardSegs: function(forwardSegs) {
		forwardSegs.sort(proxy(this, 'compareForwardSegs'));
	},


	// A cmp function for determining which forward segment to rely on more when computing coordinates.
	compareForwardSegs: function(seg1, seg2) {
		// put higher-pressure first
		return seg2.forwardPressure - seg1.forwardPressure ||
			// put segments that are closer to initial edge first (and favor ones with no coords yet)
			(seg1.backwardCoord || 0) - (seg2.backwardCoord || 0) ||
			// do normal sorting...
			this.compareEventSegs(seg1, seg2);
	},


	// Given foreground event segments that have already had their position coordinates computed,
	// assigns position-related CSS values to their elements.
	assignFgSegHorizontals: function(segs) {
		var i, seg;

		for (i = 0; i < segs.length; i++) {
			seg = segs[i];
			seg.el.css(this.generateFgSegHorizontalCss(seg));

			// if the height is short, add a className for alternate styling
			if (seg.bottom - seg.top < 30) {
				seg.el.addClass('fc-short');
			}
		}
	},


	// Generates an object with CSS properties/values that should be applied to an event segment element.
	// Contains important positioning-related properties that should be applied to any event element, customized or not.
	generateFgSegHorizontalCss: function(seg) {
		var shouldOverlap = this.view.opt('slotEventOverlap');
		var backwardCoord = seg.backwardCoord; // the left side if LTR. the right side if RTL. floating-point
		var forwardCoord = seg.forwardCoord; // the right side if LTR. the left side if RTL. floating-point
		var props = this.generateSegVerticalCss(seg); // get top/bottom first
		var left; // amount of space from left edge, a fraction of the total width
		var right; // amount of space from right edge, a fraction of the total width

		if (shouldOverlap) {
			// double the width, but don't go beyond the maximum forward coordinate (1.0)
			forwardCoord = Math.min(1, backwardCoord + (forwardCoord - backwardCoord) * 2);
		}

		if (this.isRTL) {
			left = 1 - forwardCoord;
			right = backwardCoord;
		}
		else {
			left = backwardCoord;
			right = 1 - forwardCoord;
		}

		props.zIndex = seg.level + 1; // convert from 0-base to 1-based
		props.left = left * 100 + '%';
		props.right = right * 100 + '%';

		if (shouldOverlap && seg.forwardPressure) {
			// add padding to the edge so that forward stacked events don't cover the resizer's icon
			props[this.isRTL ? 'marginLeft' : 'marginRight'] = 10 * 2; // 10 is a guesstimate of the icon's width
		}

		return props;
	}

});


// Builds an array of segments "levels". The first level will be the leftmost tier of segments if the calendar is
// left-to-right, or the rightmost if the calendar is right-to-left. Assumes the segments are already ordered by date.
function buildSlotSegLevels(segs) {
	var levels = [];
	var i, seg;
	var j;

	for (i=0; i<segs.length; i++) {
		seg = segs[i];

		// go through all the levels and stop on the first level where there are no collisions
		for (j=0; j<levels.length; j++) {
			if (!computeSlotSegCollisions(seg, levels[j]).length) {
				break;
			}
		}

		seg.level = j;

		(levels[j] || (levels[j] = [])).push(seg);
	}

	return levels;
}


// For every segment, figure out the other segments that are in subsequent
// levels that also occupy the same vertical space. Accumulate in seg.forwardSegs
function computeForwardSlotSegs(levels) {
	var i, level;
	var j, seg;
	var k;

	for (i=0; i<levels.length; i++) {
		level = levels[i];

		for (j=0; j<level.length; j++) {
			seg = level[j];

			seg.forwardSegs = [];
			for (k=i+1; k<levels.length; k++) {
				computeSlotSegCollisions(seg, levels[k], seg.forwardSegs);
			}
		}
	}
}


// Figure out which path forward (via seg.forwardSegs) results in the longest path until
// the furthest edge is reached. The number of segments in this path will be seg.forwardPressure
function computeSlotSegPressures(seg) {
	var forwardSegs = seg.forwardSegs;
	var forwardPressure = 0;
	var i, forwardSeg;

	if (seg.forwardPressure === undefined) { // not already computed

		for (i=0; i<forwardSegs.length; i++) {
			forwardSeg = forwardSegs[i];

			// figure out the child's maximum forward path
			computeSlotSegPressures(forwardSeg);

			// either use the existing maximum, or use the child's forward pressure
			// plus one (for the forwardSeg itself)
			forwardPressure = Math.max(
				forwardPressure,
				1 + forwardSeg.forwardPressure
			);
		}

		seg.forwardPressure = forwardPressure;
	}
}


// Find all the segments in `otherSegs` that vertically collide with `seg`.
// Append into an optionally-supplied `results` array and return.
function computeSlotSegCollisions(seg, otherSegs, results) {
	results = results || [];

	for (var i=0; i<otherSegs.length; i++) {
		if (isSlotSegCollision(seg, otherSegs[i])) {
			results.push(otherSegs[i]);
		}
	}

	return results;
}


// Do these segments occupy the same vertical space?
function isSlotSegCollision(seg1, seg2) {
	return seg1.bottom > seg2.top && seg1.top < seg2.bottom;
}

;;

/* An abstract class from which other views inherit from
----------------------------------------------------------------------------------------------------------------------*/

var View = FC.View = Class.extend({

	type: null, // subclass' view name (string)
	name: null, // deprecated. use `type` instead
	title: null, // the text that will be displayed in the header's title

	calendar: null, // owner Calendar object
	options: null, // hash containing all options. already merged with view-specific-options
	el: null, // the view's containing element. set by Calendar

	displaying: null, // a promise representing the state of rendering. null if no render requested
	isSkeletonRendered: false,
	isEventsRendered: false,

	// range the view is actually displaying (moments)
	start: null,
	end: null, // exclusive

	// range the view is formally responsible for (moments)
	// may be different from start/end. for example, a month view might have 1st-31st, excluding padded dates
	intervalStart: null,
	intervalEnd: null, // exclusive
	intervalDuration: null,
	intervalUnit: null, // name of largest unit being displayed, like "month" or "week"

	isRTL: false,
	isSelected: false, // boolean whether a range of time is user-selected or not

	eventOrderSpecs: null, // criteria for ordering events when they have same date/time

	// subclasses can optionally use a scroll container
	scrollerEl: null, // the element that will most likely scroll when content is too tall
	scrollTop: null, // cached vertical scroll value

	// classNames styled by jqui themes
	widgetHeaderClass: null,
	widgetContentClass: null,
	highlightStateClass: null,

	// for date utils, computed from options
	nextDayThreshold: null,
	isHiddenDayHash: null,

	// document handlers, bound to `this` object
	documentMousedownProxy: null, // TODO: doesn't work with touch

	// for refresh timing of now indicator
	nowIndicatorTimeoutID: null,
	nowIndicatorIntervalID: null,


	constructor: function(calendar, type, options, intervalDuration) {

		this.calendar = calendar;
		this.type = this.name = type; // .name is deprecated
		this.options = options;
		this.intervalDuration = intervalDuration || moment.duration(1, 'day');

		this.nextDayThreshold = moment.duration(this.opt('nextDayThreshold'));
		this.initThemingProps();
		this.initHiddenDays();
		this.isRTL = this.opt('isRTL');

		this.eventOrderSpecs = parseFieldSpecs(this.opt('eventOrder'));

		this.documentMousedownProxy = proxy(this, 'documentMousedown');

		this.initialize();
	},


	// A good place for subclasses to initialize member variables
	initialize: function() {
		// subclasses can implement
	},


	// Retrieves an option with the given name
	opt: function(name) {
		return this.options[name];
	},


	// Triggers handlers that are view-related. Modifies args before passing to calendar.
	trigger: function(name, thisObj) { // arguments beyond thisObj are passed along
		var calendar = this.calendar;

		return calendar.trigger.apply(
			calendar,
			[name, thisObj || this].concat(
				Array.prototype.slice.call(arguments, 2), // arguments beyond thisObj
				[ this ] // always make the last argument a reference to the view. TODO: deprecate
			)
		);
	},


	/* Dates
	------------------------------------------------------------------------------------------------------------------*/


	// Updates all internal dates to center around the given current unzoned date.
	setDate: function(date) {
		this.setRange(this.computeRange(date));
	},


	// Updates all internal dates for displaying the given unzoned range.
	setRange: function(range) {
		$.extend(this, range); // assigns every property to this object's member variables
		this.updateTitle();
	},


	// Given a single current unzoned date, produce information about what range to display.
	// Subclasses can override. Must return all properties.
	computeRange: function(date) {
		var intervalUnit = computeIntervalUnit(this.intervalDuration);
		var intervalStart = date.clone().startOf(intervalUnit);
		var intervalEnd = intervalStart.clone().add(this.intervalDuration);
		var start, end;

		// normalize the range's time-ambiguity
		if (/year|month|week|day/.test(intervalUnit)) { // whole-days?
			intervalStart.stripTime();
			intervalEnd.stripTime();
		}
		else { // needs to have a time?
			if (!intervalStart.hasTime()) {
				intervalStart = this.calendar.time(0); // give 00:00 time
			}
			if (!intervalEnd.hasTime()) {
				intervalEnd = this.calendar.time(0); // give 00:00 time
			}
		}

		start = intervalStart.clone();
		start = this.skipHiddenDays(start);
		end = intervalEnd.clone();
		end = this.skipHiddenDays(end, -1, true); // exclusively move backwards

		return {
			intervalUnit: intervalUnit,
			intervalStart: intervalStart,
			intervalEnd: intervalEnd,
			start: start,
			end: end
		};
	},


	// Computes the new date when the user hits the prev button, given the current date
	computePrevDate: function(date) {
		return this.massageCurrentDate(
			date.clone().startOf(this.intervalUnit).subtract(this.intervalDuration), -1
		);
	},


	// Computes the new date when the user hits the next button, given the current date
	computeNextDate: function(date) {
		return this.massageCurrentDate(
			date.clone().startOf(this.intervalUnit).add(this.intervalDuration)
		);
	},


	// Given an arbitrarily calculated current date of the calendar, returns a date that is ensured to be completely
	// visible. `direction` is optional and indicates which direction the current date was being
	// incremented or decremented (1 or -1).
	massageCurrentDate: function(date, direction) {
		if (this.intervalDuration.as('days') <= 1) { // if the view displays a single day or smaller
			if (this.isHiddenDay(date)) {
				date = this.skipHiddenDays(date, direction);
				date.startOf('day');
			}
		}

		return date;
	},


	/* Title and Date Formatting
	------------------------------------------------------------------------------------------------------------------*/


	// Sets the view's title property to the most updated computed value
	updateTitle: function() {
		this.title = this.computeTitle();
	},


	// Computes what the title at the top of the calendar should be for this view
	computeTitle: function() {
		return this.formatRange(
			{
				// in case intervalStart/End has a time, make sure timezone is correct
				start: this.calendar.applyTimezone(this.intervalStart),
				end: this.calendar.applyTimezone(this.intervalEnd)
			},
			this.opt('titleFormat') || this.computeTitleFormat(),
			this.opt('titleRangeSeparator')
		);
	},


	// Generates the format string that should be used to generate the title for the current date range.
	// Attempts to compute the most appropriate format if not explicitly specified with `titleFormat`.
	computeTitleFormat: function() {
		if (this.intervalUnit == 'year') {
			return 'YYYY';
		}
		else if (this.intervalUnit == 'month') {
			return this.opt('monthYearFormat'); // like "September 2014"
		}
		else if (this.intervalDuration.as('days') > 1) {
			return 'll'; // multi-day range. shorter, like "Sep 9 - 10 2014"
		}
		else {
			return 'LL'; // one day. longer, like "September 9 2014"
		}
	},


	// Utility for formatting a range. Accepts a range object, formatting string, and optional separator.
	// Displays all-day ranges naturally, with an inclusive end. Takes the current isRTL into account.
	// The timezones of the dates within `range` will be respected.
	formatRange: function(range, formatStr, separator) {
		var end = range.end;

		if (!end.hasTime()) { // all-day?
			end = end.clone().subtract(1); // convert to inclusive. last ms of previous day
		}

		return formatRange(range.start, end, formatStr, separator, this.opt('isRTL'));
	},


	/* Rendering
	------------------------------------------------------------------------------------------------------------------*/


	// Sets the container element that the view should render inside of.
	// Does other DOM-related initializations.
	setElement: function(el) {
		this.el = el;
		this.bindGlobalHandlers();
	},


	// Removes the view's container element from the DOM, clearing any content beforehand.
	// Undoes any other DOM-related attachments.
	removeElement: function() {
		this.clear(); // clears all content

		// clean up the skeleton
		if (this.isSkeletonRendered) {
			this.unrenderSkeleton();
			this.isSkeletonRendered = false;
		}

		this.unbindGlobalHandlers();

		this.el.remove();

		// NOTE: don't null-out this.el in case the View was destroyed within an API callback.
		// We don't null-out the View's other jQuery element references upon destroy,
		//  so we shouldn't kill this.el either.
	},


	// Does everything necessary to display the view centered around the given unzoned date.
	// Does every type of rendering EXCEPT rendering events.
	// Is asychronous and returns a promise.
	display: function(date) {
		var _this = this;
		var scrollState = null;

		if (this.displaying) {
			scrollState = this.queryScroll();
		}

		this.calendar.freezeContentHeight();

		return this.clear().then(function() { // clear the content first (async)
			return (
				_this.displaying =
					$.when(_this.displayView(date)) // displayView might return a promise
						.then(function() {
							_this.forceScroll(_this.computeInitialScroll(scrollState));
							_this.calendar.unfreezeContentHeight();
							_this.triggerRender();
						})
			);
		});
	},


	// Does everything necessary to clear the content of the view.
	// Clears dates and events. Does not clear the skeleton.
	// Is asychronous and returns a promise.
	clear: function() {
		var _this = this;
		var displaying = this.displaying;

		if (displaying) { // previously displayed, or in the process of being displayed?
			return displaying.then(function() { // wait for the display to finish
				_this.displaying = null;
				_this.clearEvents();
				return _this.clearView(); // might return a promise. chain it
			});
		}
		else {
			return $.when(); // an immediately-resolved promise
		}
	},


	// If the view has already been displayed, tears it down and displays it again.
	// Will re-render the events if necessary, which display/clear DO NOT do.
	// TODO: make behavior more consistent.
	redisplay: function() {
		if (this.isSkeletonRendered) {
			var wasEventsRendered = this.isEventsRendered;
			this.clearEvents(); // won't trigger handlers if events never rendered
			this.clearView();
			this.displayView();
			if (wasEventsRendered) { // only render and trigger handlers if events previously rendered
				this.displayEvents(this.calendar.getEventCache());
			}
		}
	},


	// Displays the view's non-event content, such as date-related content or anything required by events.
	// Renders the view's non-content skeleton if necessary.
	// Can be asynchronous and return a promise.
	displayView: function(date) {
		if (!this.isSkeletonRendered) {
			this.renderSkeleton();
			this.isSkeletonRendered = true;
		}
		if (date) {
			this.setDate(date);
		}
		if (this.render) {
			this.render(); // TODO: deprecate
		}
		this.renderDates();
		this.updateSize();
		this.renderBusinessHours(); // might need coordinates, so should go after updateSize()

		if (this.opt('nowIndicator')) {
			this.startNowIndicator();
		}
	},


	// Unrenders the view content that was rendered in displayView.
	// Can be asynchronous and return a promise.
	clearView: function() {
		this.unselect();
		this.stopNowIndicator();
		this.triggerUnrender();
		this.unrenderBusinessHours();
		this.unrenderDates();
		if (this.destroy) {
			this.destroy(); // TODO: deprecate
		}
	},


	// Renders the basic structure of the view before any content is rendered
	renderSkeleton: function() {
		// subclasses should implement
	},


	// Unrenders the basic structure of the view
	unrenderSkeleton: function() {
		// subclasses should implement
	},


	// Renders the view's date-related content.
	// Assumes setRange has already been called and the skeleton has already been rendered.
	renderDates: function() {
		// subclasses should implement
	},


	// Unrenders the view's date-related content
	unrenderDates: function() {
		// subclasses should override
	},


	// Signals that the view's content has been rendered
	triggerRender: function() {
		this.trigger('viewRender', this, this, this.el);
	},


	// Signals that the view's content is about to be unrendered
	triggerUnrender: function() {
		this.trigger('viewDestroy', this, this, this.el);
	},


	// Binds DOM handlers to elements that reside outside the view container, such as the document
	bindGlobalHandlers: function() {
		$(document).on('mousedown', this.documentMousedownProxy);
	},


	// Unbinds DOM handlers from elements that reside outside the view container
	unbindGlobalHandlers: function() {
		$(document).off('mousedown', this.documentMousedownProxy);
	},


	// Initializes internal variables related to theming
	initThemingProps: function() {
		var tm = this.opt('theme') ? 'ui' : 'fc';

		this.widgetHeaderClass = tm + '-widget-header';
		this.widgetContentClass = tm + '-widget-content';
		this.highlightStateClass = tm + '-state-highlight';
	},


	/* Business Hours
	------------------------------------------------------------------------------------------------------------------*/


	// Renders business-hours onto the view. Assumes updateSize has already been called.
	renderBusinessHours: function() {
		// subclasses should implement
	},


	// Unrenders previously-rendered business-hours
	unrenderBusinessHours: function() {
		// subclasses should implement
	},


	/* Now Indicator
	------------------------------------------------------------------------------------------------------------------*/


	// Immediately render the current time indicator and begins re-rendering it at an interval,
	// which is defined by this.getNowIndicatorUnit().
	// TODO: somehow do this for the current whole day's background too
	startNowIndicator: function() {
		var _this = this;
		var unit = this.getNowIndicatorUnit();
		var initialNow; // result first getNow call
		var initialNowQueried; // ms time of then getNow was called
		var delay; // ms wait value

		// rerenders the now indicator, computing the new current time from the amount of time that has passed
		// since the initial getNow call.
		function update() {
			_this.unrenderNowIndicator();
			_this.renderNowIndicator(
				initialNow.clone().add(new Date() - initialNowQueried) // add ms
			);
		}

		if (unit) {
			initialNow = this.calendar.getNow();
			initialNowQueried = +new Date();
			this.renderNowIndicator(initialNow);

			// wait until the beginning of the next interval
			delay = initialNow.clone().startOf(unit).add(1, unit) - initialNow;
			this.nowIndicatorTimeoutID = setTimeout(function() {
				this.nowIndicatorTimeoutID = null;
				update();
				delay = +moment.duration(1, unit);
				delay = Math.max(100, delay); // prevent too frequent
				this.nowIndicatorIntervalID = setInterval(update, delay); // update every interval
			}, delay);
		}
	},


	// Immediately unrenders the view's current time indicator and stops any re-rendering timers.
	// Won't cause side effects if indicator isn't rendered.
	stopNowIndicator: function() {
		var cleared = false;

		if (this.nowIndicatorTimeoutID) {
			clearTimeout(this.nowIndicatorTimeoutID);
			cleared = true;
		}
		if (this.nowIndicatorIntervalID) {
			clearTimeout(this.nowIndicatorIntervalID);
			cleared = true;
		}

		if (cleared) { // is the indicator currently display?
			this.unrenderNowIndicator();
		}
	},


	// Returns a string unit, like 'second' or 'minute' that defined how often the current time indicator
	// should be refreshed. If something falsy is returned, no time indicator is rendered at all.
	getNowIndicatorUnit: function() {
		// subclasses should implement
	},


	// Renders a current time indicator at the given datetime
	renderNowIndicator: function(date) {
		// subclasses should implement
	},


	// Undoes the rendering actions from renderNowIndicator
	unrenderNowIndicator: function() {
		// subclasses should implement
	},


	/* Dimensions
	------------------------------------------------------------------------------------------------------------------*/


	// Refreshes anything dependant upon sizing of the container element of the grid
	updateSize: function(isResize) {
		var scrollState;

		if (isResize) {
			scrollState = this.queryScroll();
		}

		this.updateHeight(isResize);
		this.updateWidth(isResize);

		if (isResize) {
			this.setScroll(scrollState);
		}
	},


	// Refreshes the horizontal dimensions of the calendar
	updateWidth: function(isResize) {
		// subclasses should implement
	},


	// Refreshes the vertical dimensions of the calendar
	updateHeight: function(isResize) {
		var calendar = this.calendar; // we poll the calendar for height information

		this.setHeight(
			calendar.getSuggestedViewHeight(),
			calendar.isHeightAuto()
		);
	},


	// Updates the vertical dimensions of the calendar to the specified height.
	// if `isAuto` is set to true, height becomes merely a suggestion and the view should use its "natural" height.
	setHeight: function(height, isAuto) {
		// subclasses should implement
	},


	/* Scroller
	------------------------------------------------------------------------------------------------------------------*/


	// Given the total height of the view, return the number of pixels that should be used for the scroller.
	// Utility for subclasses.
	computeScrollerHeight: function(totalHeight) {
		var scrollerEl = this.scrollerEl;
		var both;
		var otherHeight; // cumulative height of everything that is not the scrollerEl in the view (header+borders)

		both = this.el.add(scrollerEl);

		// fuckin IE8/9/10/11 sometimes returns 0 for dimensions. this weird hack was the only thing that worked
		both.css({
			position: 'relative', // cause a reflow, which will force fresh dimension recalculation
			left: -1 // ensure reflow in case the el was already relative. negative is less likely to cause new scroll
		});
		otherHeight = this.el.outerHeight() - scrollerEl.height(); // grab the dimensions
		both.css({ position: '', left: '' }); // undo hack

		return totalHeight - otherHeight;
	},


	// Computes the initial pre-configured scroll state prior to allowing the user to change it.
	// Given the scroll state from the previous rendering. If first time rendering, given null.
	computeInitialScroll: function(previousScrollState) {
		return 0;
	},


	// Retrieves the view's current natural scroll state. Can return an arbitrary format.
	queryScroll: function() {
		if (this.scrollerEl) {
			return this.scrollerEl.scrollTop(); // operates on scrollerEl by default
		}
	},


	// Sets the view's scroll state. Will accept the same format computeInitialScroll and queryScroll produce.
	setScroll: function(scrollState) {
		if (this.scrollerEl) {
			return this.scrollerEl.scrollTop(scrollState); // operates on scrollerEl by default
		}
	},


	// Sets the scroll state, making sure to overcome any predefined scroll value the browser has in mind
	forceScroll: function(scrollState) {
		var _this = this;

		this.setScroll(scrollState);
		setTimeout(function() {
			_this.setScroll(scrollState);
		}, 0);
	},


	/* Event Elements / Segments
	------------------------------------------------------------------------------------------------------------------*/


	// Does everything necessary to display the given events onto the current view
	displayEvents: function(events) {
		var scrollState = this.queryScroll();

		this.clearEvents();
		this.renderEvents(events);
		this.isEventsRendered = true;
		this.setScroll(scrollState);
		this.triggerEventRender();
	},


	// Does everything necessary to clear the view's currently-rendered events
	clearEvents: function() {
		var scrollState;

		if (this.isEventsRendered) {

			// TODO: optimize: if we know this is part of a displayEvents call, don't queryScroll/setScroll
			scrollState = this.queryScroll();

			this.triggerEventUnrender();
			if (this.destroyEvents) {
				this.destroyEvents(); // TODO: deprecate
			}
			this.unrenderEvents();
			this.setScroll(scrollState);
			this.isEventsRendered = false;
		}
	},


	// Renders the events onto the view.
	renderEvents: function(events) {
		// subclasses should implement
	},


	// Removes event elements from the view.
	unrenderEvents: function() {
		// subclasses should implement
	},


	// Signals that all events have been rendered
	triggerEventRender: function() {
		this.renderedEventSegEach(function(seg) {
			this.trigger('eventAfterRender', seg.event, seg.event, seg.el);
		});
		this.trigger('eventAfterAllRender');
	},


	// Signals that all event elements are about to be removed
	triggerEventUnrender: function() {
		this.renderedEventSegEach(function(seg) {
			this.trigger('eventDestroy', seg.event, seg.event, seg.el);
		});
	},


	// Given an event and the default element used for rendering, returns the element that should actually be used.
	// Basically runs events and elements through the eventRender hook.
	resolveEventEl: function(event, el) {
		var custom = this.trigger('eventRender', event, event, el);

		if (custom === false) { // means don't render at all
			el = null;
		}
		else if (custom && custom !== true) {
			el = $(custom);
		}

		return el;
	},


	// Hides all rendered event segments linked to the given event
	showEvent: function(event) {
		this.renderedEventSegEach(function(seg) {
			seg.el.css('visibility', '');
		}, event);
	},


	// Shows all rendered event segments linked to the given event
	hideEvent: function(event) {
		this.renderedEventSegEach(function(seg) {
			seg.el.css('visibility', 'hidden');
		}, event);
	},


	// Iterates through event segments that have been rendered (have an el). Goes through all by default.
	// If the optional `event` argument is specified, only iterates through segments linked to that event.
	// The `this` value of the callback function will be the view.
	renderedEventSegEach: function(func, event) {
		var segs = this.getEventSegs();
		var i;

		for (i = 0; i < segs.length; i++) {
			if (!event || segs[i].event._id === event._id) {
				if (segs[i].el) {
					func.call(this, segs[i]);
				}
			}
		}
	},


	// Retrieves all the rendered segment objects for the view
	getEventSegs: function() {
		// subclasses must implement
		return [];
	},


	/* Event Drag-n-Drop
	------------------------------------------------------------------------------------------------------------------*/


	// Computes if the given event is allowed to be dragged by the user
	isEventDraggable: function(event) {
		var source = event.source || {};

		return firstDefined(
			event.startEditable,
			source.startEditable,
			this.opt('eventStartEditable'),
			event.editable,
			source.editable,
			this.opt('editable')
		);
	},


	// Must be called when an event in the view is dropped onto new location.
	// `dropLocation` is an object that contains the new zoned start/end/allDay values for the event.
	reportEventDrop: function(event, dropLocation, largeUnit, el, ev) {
		var calendar = this.calendar;
		var mutateResult = calendar.mutateEvent(event, dropLocation, largeUnit);
		var undoFunc = function() {
			mutateResult.undo();
			calendar.reportEventChange();
		};

		this.triggerEventDrop(event, mutateResult.dateDelta, undoFunc, el, ev);
		calendar.reportEventChange(); // will rerender events
	},


	// Triggers event-drop handlers that have subscribed via the API
	triggerEventDrop: function(event, dateDelta, undoFunc, el, ev) {
		this.trigger('eventDrop', el[0], event, dateDelta, undoFunc, ev, {}); // {} = jqui dummy
	},


	/* External Element Drag-n-Drop
	------------------------------------------------------------------------------------------------------------------*/


	// Must be called when an external element, via jQuery UI, has been dropped onto the calendar.
	// `meta` is the parsed data that has been embedded into the dragging event.
	// `dropLocation` is an object that contains the new zoned start/end/allDay values for the event.
	reportExternalDrop: function(meta, dropLocation, el, ev, ui) {
		var eventProps = meta.eventProps;
		var eventInput;
		var event;

		// Try to build an event object and render it. TODO: decouple the two
		if (eventProps) {
			eventInput = $.extend({}, eventProps, dropLocation);
			event = this.calendar.renderEvent(eventInput, meta.stick)[0]; // renderEvent returns an array
		}

		this.triggerExternalDrop(event, dropLocation, el, ev, ui);
	},


	// Triggers external-drop handlers that have subscribed via the API
	triggerExternalDrop: function(event, dropLocation, el, ev, ui) {

		// trigger 'drop' regardless of whether element represents an event
		this.trigger('drop', el[0], dropLocation.start, ev, ui);

		if (event) {
			this.trigger('eventReceive', null, event); // signal an external event landed
		}
	},


	/* Drag-n-Drop Rendering (for both events and external elements)
	------------------------------------------------------------------------------------------------------------------*/


	// Renders a visual indication of a event or external-element drag over the given drop zone.
	// If an external-element, seg will be `null`
	renderDrag: function(dropLocation, seg) {
		// subclasses must implement
	},


	// Unrenders a visual indication of an event or external-element being dragged.
	unrenderDrag: function() {
		// subclasses must implement
	},


	/* Event Resizing
	------------------------------------------------------------------------------------------------------------------*/


	// Computes if the given event is allowed to be resized from its starting edge
	isEventResizableFromStart: function(event) {
		return this.opt('eventResizableFromStart') && this.isEventResizable(event);
	},


	// Computes if the given event is allowed to be resized from its ending edge
	isEventResizableFromEnd: function(event) {
		return this.isEventResizable(event);
	},


	// Computes if the given event is allowed to be resized by the user at all
	isEventResizable: function(event) {
		var source = event.source || {};

		return firstDefined(
			event.durationEditable,
			source.durationEditable,
			this.opt('eventDurationEditable'),
			event.editable,
			source.editable,
			this.opt('editable')
		);
	},


	// Must be called when an event in the view has been resized to a new length
	reportEventResize: function(event, resizeLocation, largeUnit, el, ev) {
		var calendar = this.calendar;
		var mutateResult = calendar.mutateEvent(event, resizeLocation, largeUnit);
		var undoFunc = function() {
			mutateResult.undo();
			calendar.reportEventChange();
		};

		this.triggerEventResize(event, mutateResult.durationDelta, undoFunc, el, ev);
		calendar.reportEventChange(); // will rerender events
	},


	// Triggers event-resize handlers that have subscribed via the API
	triggerEventResize: function(event, durationDelta, undoFunc, el, ev) {
		this.trigger('eventResize', el[0], event, durationDelta, undoFunc, ev, {}); // {} = jqui dummy
	},


	/* Selection
	------------------------------------------------------------------------------------------------------------------*/


	// Selects a date span on the view. `start` and `end` are both Moments.
	// `ev` is the native mouse event that begin the interaction.
	select: function(span, ev) {
		this.unselect(ev);
		this.renderSelection(span);
		this.reportSelection(span, ev);
	},


	// Renders a visual indication of the selection
	renderSelection: function(span) {
		// subclasses should implement
	},


	// Called when a new selection is made. Updates internal state and triggers handlers.
	reportSelection: function(span, ev) {
		this.isSelected = true;
		this.triggerSelect(span, ev);
	},


	// Triggers handlers to 'select'
	triggerSelect: function(span, ev) {
		this.trigger(
			'select',
			null,
			this.calendar.applyTimezone(span.start), // convert to calendar's tz for external API
			this.calendar.applyTimezone(span.end), // "
			ev
		);
	},


	// Undoes a selection. updates in the internal state and triggers handlers.
	// `ev` is the native mouse event that began the interaction.
	unselect: function(ev) {
		if (this.isSelected) {
			this.isSelected = false;
			if (this.destroySelection) {
				this.destroySelection(); // TODO: deprecate
			}
			this.unrenderSelection();
			this.trigger('unselect', null, ev);
		}
	},


	// Unrenders a visual indication of selection
	unrenderSelection: function() {
		// subclasses should implement
	},


	// Handler for unselecting when the user clicks something and the 'unselectAuto' setting is on
	documentMousedown: function(ev) {
		var ignore;

		// is there a selection, and has the user made a proper left click?
		if (this.isSelected && this.opt('unselectAuto') && isPrimaryMouseButton(ev)) {

			// only unselect if the clicked element is not identical to or inside of an 'unselectCancel' element
			ignore = this.opt('unselectCancel');
			if (!ignore || !$(ev.target).closest(ignore).length) {
				this.unselect(ev);
			}
		}
	},


	/* Day Click
	------------------------------------------------------------------------------------------------------------------*/


	// Triggers handlers to 'dayClick'
	// Span has start/end of the clicked area. Only the start is useful.
	triggerDayClick: function(span, dayEl, ev) {
		this.trigger(
			'dayClick',
			dayEl,
			this.calendar.applyTimezone(span.start), // convert to calendar's timezone for external API
			ev
		);
	},


	/* Date Utils
	------------------------------------------------------------------------------------------------------------------*/


	// Initializes internal variables related to calculating hidden days-of-week
	initHiddenDays: function() {
		var hiddenDays = this.opt('hiddenDays') || []; // array of day-of-week indices that are hidden
		var isHiddenDayHash = []; // is the day-of-week hidden? (hash with day-of-week-index -> bool)
		var dayCnt = 0;
		var i;

		if (this.opt('weekends') === false) {
			hiddenDays.push(0, 6); // 0=sunday, 6=saturday
		}

		for (i = 0; i < 7; i++) {
			if (
				!(isHiddenDayHash[i] = $.inArray(i, hiddenDays) !== -1)
			) {
				dayCnt++;
			}
		}

		if (!dayCnt) {
			throw 'invalid hiddenDays'; // all days were hidden? bad.
		}

		this.isHiddenDayHash = isHiddenDayHash;
	},


	// Is the current day hidden?
	// `day` is a day-of-week index (0-6), or a Moment
	isHiddenDay: function(day) {
		if (moment.isMoment(day)) {
			day = day.day();
		}
		return this.isHiddenDayHash[day];
	},


	// Incrementing the current day until it is no longer a hidden day, returning a copy.
	// If the initial value of `date` is not a hidden day, don't do anything.
	// Pass `isExclusive` as `true` if you are dealing with an end date.
	// `inc` defaults to `1` (increment one day forward each time)
	skipHiddenDays: function(date, inc, isExclusive) {
		var out = date.clone();
		inc = inc || 1;
		while (
			this.isHiddenDayHash[(out.day() + (isExclusive ? inc : 0) + 7) % 7]
		) {
			out.add(inc, 'days');
		}
		return out;
	},


	// Returns the date range of the full days the given range visually appears to occupy.
	// Returns a new range object.
	computeDayRange: function(range) {
		var startDay = range.start.clone().stripTime(); // the beginning of the day the range starts
		var end = range.end;
		var endDay = null;
		var endTimeMS;

		if (end) {
			endDay = end.clone().stripTime(); // the beginning of the day the range exclusively ends
			endTimeMS = +end.time(); // # of milliseconds into `endDay`

			// If the end time is actually inclusively part of the next day and is equal to or
			// beyond the next day threshold, adjust the end to be the exclusive end of `endDay`.
			// Otherwise, leaving it as inclusive will cause it to exclude `endDay`.
			if (endTimeMS && endTimeMS >= this.nextDayThreshold) {
				endDay.add(1, 'days');
			}
		}

		// If no end was specified, or if it is within `startDay` but not past nextDayThreshold,
		// assign the default duration of one day.
		if (!end || endDay <= startDay) {
			endDay = startDay.clone().add(1, 'days');
		}

		return { start: startDay, end: endDay };
	},


	// Does the given event visually appear to occupy more than one day?
	isMultiDayEvent: function(event) {
		var range = this.computeDayRange(event); // event is range-ish

		return range.end.diff(range.start, 'days') > 1;
	}

});

;;

var Calendar = FC.Calendar = Class.extend({

	dirDefaults: null, // option defaults related to LTR or RTL
	langDefaults: null, // option defaults related to current locale
	overrides: null, // option overrides given to the fullCalendar constructor
	options: null, // all defaults combined with overrides
	viewSpecCache: null, // cache of view definitions
	view: null, // current View object
	header: null,
	loadingLevel: 0, // number of simultaneous loading tasks


	// a lot of this class' OOP logic is scoped within this constructor function,
	// but in the future, write individual methods on the prototype.
	constructor: Calendar_constructor,


	// Subclasses can override this for initialization logic after the constructor has been called
	initialize: function() {
	},


	// Initializes `this.options` and other important options-related objects
	initOptions: function(overrides) {
		var lang, langDefaults;
		var isRTL, dirDefaults;

		// converts legacy options into non-legacy ones.
		// in the future, when this is removed, don't use `overrides` reference. make a copy.
		overrides = massageOverrides(overrides);

		lang = overrides.lang;
		langDefaults = langOptionHash[lang];
		if (!langDefaults) {
			lang = Calendar.defaults.lang;
			langDefaults = langOptionHash[lang] || {};
		}

		isRTL = firstDefined(
			overrides.isRTL,
			langDefaults.isRTL,
			Calendar.defaults.isRTL
		);
		dirDefaults = isRTL ? Calendar.rtlDefaults : {};

		this.dirDefaults = dirDefaults;
		this.langDefaults = langDefaults;
		this.overrides = overrides;
		this.options = mergeOptions([ // merge defaults and overrides. lowest to highest precedence
			Calendar.defaults, // global defaults
			dirDefaults,
			langDefaults,
			overrides
		]);
		populateInstanceComputableOptions(this.options);

		this.viewSpecCache = {}; // somewhat unrelated
	},


	// Gets information about how to create a view. Will use a cache.
	getViewSpec: function(viewType) {
		var cache = this.viewSpecCache;

		return cache[viewType] || (cache[viewType] = this.buildViewSpec(viewType));
	},


	// Given a duration singular unit, like "week" or "day", finds a matching view spec.
	// Preference is given to views that have corresponding buttons.
	getUnitViewSpec: function(unit) {
		var viewTypes;
		var i;
		var spec;

		if ($.inArray(unit, intervalUnits) != -1) {

			// put views that have buttons first. there will be duplicates, but oh well
			viewTypes = this.header.getViewsWithButtons();
			$.each(FC.views, function(viewType) { // all views
				viewTypes.push(viewType);
			});

			for (i = 0; i < viewTypes.length; i++) {
				spec = this.getViewSpec(viewTypes[i]);
				if (spec) {
					if (spec.singleUnit == unit) {
						return spec;
					}
				}
			}
		}
	},


	// Builds an object with information on how to create a given view
	buildViewSpec: function(requestedViewType) {
		var viewOverrides = this.overrides.views || {};
		var specChain = []; // for the view. lowest to highest priority
		var defaultsChain = []; // for the view. lowest to highest priority
		var overridesChain = []; // for the view. lowest to highest priority
		var viewType = requestedViewType;
		var spec; // for the view
		var overrides; // for the view
		var duration;
		var unit;

		// iterate from the specific view definition to a more general one until we hit an actual View class
		while (viewType) {
			spec = fcViews[viewType];
			overrides = viewOverrides[viewType];
			viewType = null; // clear. might repopulate for another iteration

			if (typeof spec === 'function') { // TODO: deprecate
				spec = { 'class': spec };
			}

			if (spec) {
				specChain.unshift(spec);
				defaultsChain.unshift(spec.defaults || {});
				duration = duration || spec.duration;
				viewType = viewType || spec.type;
			}

			if (overrides) {
				overridesChain.unshift(overrides); // view-specific option hashes have options at zero-level
				duration = duration || overrides.duration;
				viewType = viewType || overrides.type;
			}
		}

		spec = mergeProps(specChain);
		spec.type = requestedViewType;
		if (!spec['class']) {
			return false;
		}

		if (duration) {
			duration = moment.duration(duration);
			if (duration.valueOf()) { // valid?
				spec.duration = duration;
				unit = computeIntervalUnit(duration);

				// view is a single-unit duration, like "week" or "day"
				// incorporate options for this. lowest priority
				if (duration.as(unit) === 1) {
					spec.singleUnit = unit;
					overridesChain.unshift(viewOverrides[unit] || {});
				}
			}
		}

		spec.defaults = mergeOptions(defaultsChain);
		spec.overrides = mergeOptions(overridesChain);

		this.buildViewSpecOptions(spec);
		this.buildViewSpecButtonText(spec, requestedViewType);

		return spec;
	},


	// Builds and assigns a view spec's options object from its already-assigned defaults and overrides
	buildViewSpecOptions: function(spec) {
		spec.options = mergeOptions([ // lowest to highest priority
			Calendar.defaults, // global defaults
			spec.defaults, // view's defaults (from ViewSubclass.defaults)
			this.dirDefaults,
			this.langDefaults, // locale and dir take precedence over view's defaults!
			this.overrides, // calendar's overrides (options given to constructor)
			spec.overrides // view's overrides (view-specific options)
		]);
		populateInstanceComputableOptions(spec.options);
	},


	// Computes and assigns a view spec's buttonText-related options
	buildViewSpecButtonText: function(spec, requestedViewType) {

		// given an options object with a possible `buttonText` hash, lookup the buttonText for the
		// requested view, falling back to a generic unit entry like "week" or "day"
		function queryButtonText(options) {
			var buttonText = options.buttonText || {};
			return buttonText[requestedViewType] ||
				(spec.singleUnit ? buttonText[spec.singleUnit] : null);
		}

		// highest to lowest priority
		spec.buttonTextOverride =
			queryButtonText(this.overrides) || // constructor-specified buttonText lookup hash takes precedence
			spec.overrides.buttonText; // `buttonText` for view-specific options is a string

		// highest to lowest priority. mirrors buildViewSpecOptions
		spec.buttonTextDefault =
			queryButtonText(this.langDefaults) ||
			queryButtonText(this.dirDefaults) ||
			spec.defaults.buttonText || // a single string. from ViewSubclass.defaults
			queryButtonText(Calendar.defaults) ||
			(spec.duration ? this.humanizeDuration(spec.duration) : null) || // like "3 days"
			requestedViewType; // fall back to given view name
	},


	// Given a view name for a custom view or a standard view, creates a ready-to-go View object
	instantiateView: function(viewType) {
		var spec = this.getViewSpec(viewType);

		return new spec['class'](this, viewType, spec.options, spec.duration);
	},


	// Returns a boolean about whether the view is okay to instantiate at some point
	isValidViewType: function(viewType) {
		return Boolean(this.getViewSpec(viewType));
	},


	// Should be called when any type of async data fetching begins
	pushLoading: function() {
		if (!(this.loadingLevel++)) {
			this.trigger('loading', null, true, this.view);
		}
	},


	// Should be called when any type of async data fetching completes
	popLoading: function() {
		if (!(--this.loadingLevel)) {
			this.trigger('loading', null, false, this.view);
		}
	},


	// Given arguments to the select method in the API, returns a span (unzoned start/end and other info)
	buildSelectSpan: function(zonedStartInput, zonedEndInput) {
		var start = this.moment(zonedStartInput).stripZone();
		var end;

		if (zonedEndInput) {
			end = this.moment(zonedEndInput).stripZone();
		}
		else if (start.hasTime()) {
			end = start.clone().add(this.defaultTimedEventDuration);
		}
		else {
			end = start.clone().add(this.defaultAllDayEventDuration);
		}

		return { start: start, end: end };
	}

});


Calendar.mixin(Emitter);


function Calendar_constructor(element, overrides) {
	var t = this;


	t.initOptions(overrides || {});
	var options = this.options;

	
	// Exports
	// -----------------------------------------------------------------------------------

	t.render = render;
	t.destroy = destroy;
	t.refetchEvents = refetchEvents;
	t.reportEvents = reportEvents;
	t.reportEventChange = reportEventChange;
	t.rerenderEvents = renderEvents; // `renderEvents` serves as a rerender. an API method
	t.changeView = renderView; // `renderView` will switch to another view
	t.select = select;
	t.unselect = unselect;
	t.prev = prev;
	t.next = next;
	t.prevYear = prevYear;
	t.nextYear = nextYear;
	t.today = today;
	t.gotoDate = gotoDate;
	t.incrementDate = incrementDate;
	t.zoomTo = zoomTo;
	t.getDate = getDate;
	t.getCalendar = getCalendar;
	t.getView = getView;
	t.option = option;
	t.trigger = trigger;



	// Language-data Internals
	// -----------------------------------------------------------------------------------
	// Apply overrides to the current language's data


	var localeData = createObject( // make a cheap copy
		getMomentLocaleData(options.lang) // will fall back to en
	);

	if (options.monthNames) {
		localeData._months = options.monthNames;
	}
	if (options.monthNamesShort) {
		localeData._monthsShort = options.monthNamesShort;
	}
	if (options.dayNames) {
		localeData._weekdays = options.dayNames;
	}
	if (options.dayNamesShort) {
		localeData._weekdaysShort = options.dayNamesShort;
	}
	if (options.firstDay != null) {
		var _week = createObject(localeData._week); // _week: { dow: # }
		_week.dow = options.firstDay;
		localeData._week = _week;
	}

	// assign a normalized value, to be used by our .week() moment extension
	localeData._fullCalendar_weekCalc = (function(weekCalc) {
		if (typeof weekCalc === 'function') {
			return weekCalc;
		}
		else if (weekCalc === 'local') {
			return weekCalc;
		}
		else if (weekCalc === 'iso' || weekCalc === 'ISO') {
			return 'ISO';
		}
	})(options.weekNumberCalculation);



	// Calendar-specific Date Utilities
	// -----------------------------------------------------------------------------------


	t.defaultAllDayEventDuration = moment.duration(options.defaultAllDayEventDuration);
	t.defaultTimedEventDuration = moment.duration(options.defaultTimedEventDuration);


	// Builds a moment using the settings of the current calendar: timezone and language.
	// Accepts anything the vanilla moment() constructor accepts.
	t.moment = function() {
		var mom;

		if (options.timezone === 'local') {
			mom = FC.moment.apply(null, arguments);

			// Force the moment to be local, because FC.moment doesn't guarantee it.
			if (mom.hasTime()) { // don't give ambiguously-timed moments a local zone
				mom.local();
			}
		}
		else if (options.timezone === 'UTC') {
			mom = FC.moment.utc.apply(null, arguments); // process as UTC
		}
		else {
			mom = FC.moment.parseZone.apply(null, arguments); // let the input decide the zone
		}

		if ('_locale' in mom) { // moment 2.8 and above
			mom._locale = localeData;
		}
		else { // pre-moment-2.8
			mom._lang = localeData;
		}

		return mom;
	};


	// Returns a boolean about whether or not the calendar knows how to calculate
	// the timezone offset of arbitrary dates in the current timezone.
	t.getIsAmbigTimezone = function() {
		return options.timezone !== 'local' && options.timezone !== 'UTC';
	};


	// Returns a copy of the given date in the current timezone. Has no effect on dates without times.
	t.applyTimezone = function(date) {
		if (!date.hasTime()) {
			return date.clone();
		}

		var zonedDate = t.moment(date.toArray());
		var timeAdjust = date.time() - zonedDate.time();
		var adjustedZonedDate;

		// Safari sometimes has problems with this coersion when near DST. Adjust if necessary. (bug #2396)
		if (timeAdjust) { // is the time result different than expected?
			adjustedZonedDate = zonedDate.clone().add(timeAdjust); // add milliseconds
			if (date.time() - adjustedZonedDate.time() === 0) { // does it match perfectly now?
				zonedDate = adjustedZonedDate;
			}
		}

		return zonedDate;
	};


	// Returns a moment for the current date, as defined by the client's computer or from the `now` option.
	// Will return an moment with an ambiguous timezone.
	t.getNow = function() {
		var now = options.now;
		if (typeof now === 'function') {
			now = now();
		}
		return t.moment(now).stripZone();
	};


	// Get an event's normalized end date. If not present, calculate it from the defaults.
	t.getEventEnd = function(event) {
		if (event.end) {
			return event.end.clone();
		}
		else {
			return t.getDefaultEventEnd(event.allDay, event.start);
		}
	};


	// Given an event's allDay status and start date, return what its fallback end date should be.
	// TODO: rename to computeDefaultEventEnd
	t.getDefaultEventEnd = function(allDay, zonedStart) {
		var end = zonedStart.clone();

		if (allDay) {
			end.stripTime().add(t.defaultAllDayEventDuration);
		}
		else {
			end.add(t.defaultTimedEventDuration);
		}

		if (t.getIsAmbigTimezone()) {
			end.stripZone(); // we don't know what the tzo should be
		}

		return end;
	};


	// Produces a human-readable string for the given duration.
	// Side-effect: changes the locale of the given duration.
	t.humanizeDuration = function(duration) {
		return (duration.locale || duration.lang).call(duration, options.lang) // works moment-pre-2.8
			.humanize();
	};


	
	// Imports
	// -----------------------------------------------------------------------------------


	EventManager.call(t, options);
	var isFetchNeeded = t.isFetchNeeded;
	var fetchEvents = t.fetchEvents;



	// Locals
	// -----------------------------------------------------------------------------------


	var _element = element[0];
	var header;
	var headerElement;
	var content;
	var tm; // for making theme classes
	var currentView; // NOTE: keep this in sync with this.view
	var viewsByType = {}; // holds all instantiated view instances, current or not
	var suggestedViewHeight;
	var windowResizeProxy; // wraps the windowResize function
	var ignoreWindowResize = 0;
	var events = [];
	var date; // unzoned
	
	
	
	// Main Rendering
	// -----------------------------------------------------------------------------------


	// compute the initial ambig-timezone date
	if (options.defaultDate != null) {
		date = t.moment(options.defaultDate).stripZone();
	}
	else {
		date = t.getNow(); // getNow already returns unzoned
	}
	
	
	function render() {
		if (!content) {
			initialRender();
		}
		else if (elementVisible()) {
			// mainly for the public API
			calcSize();
			renderView();
		}
	}
	
	
	function initialRender() {
		tm = options.theme ? 'ui' : 'fc';
		element.addClass('fc');

		if (options.isRTL) {
			element.addClass('fc-rtl');
		}
		else {
			element.addClass('fc-ltr');
		}

		if (options.theme) {
			element.addClass('ui-widget');
		}
		else {
			element.addClass('fc-unthemed');
		}

		content = $("<div class='fc-view-container'/>").prependTo(element);

		header = t.header = new Header(t, options);
		headerElement = header.render();
		if (headerElement) {
			element.prepend(headerElement);
		}

		renderView(options.defaultView);

		if (options.handleWindowResize) {
			windowResizeProxy = debounce(windowResize, options.windowResizeDelay); // prevents rapid calls
			$(window).resize(windowResizeProxy);
		}
	}
	
	
	function destroy() {

		if (currentView) {
			currentView.removeElement();

			// NOTE: don't null-out currentView/t.view in case API methods are called after destroy.
			// It is still the "current" view, just not rendered.
		}

		header.removeElement();
		content.remove();
		element.removeClass('fc fc-ltr fc-rtl fc-unthemed ui-widget');

		if (windowResizeProxy) {
			$(window).unbind('resize', windowResizeProxy);
		}
	}
	
	
	function elementVisible() {
		return element.is(':visible');
	}
	
	

	// View Rendering
	// -----------------------------------------------------------------------------------


	// Renders a view because of a date change, view-type change, or for the first time.
	// If not given a viewType, keep the current view but render different dates.
	function renderView(viewType) {
		ignoreWindowResize++;

		// if viewType is changing, remove the old view's rendering
		if (currentView && viewType && currentView.type !== viewType) {
			header.deactivateButton(currentView.type);
			freezeContentHeight(); // prevent a scroll jump when view element is removed
			currentView.removeElement();
			currentView = t.view = null;
		}

		// if viewType changed, or the view was never created, create a fresh view
		if (!currentView && viewType) {
			currentView = t.view =
				viewsByType[viewType] ||
				(viewsByType[viewType] = t.instantiateView(viewType));

			currentView.setElement(
				$("<div class='fc-view fc-" + viewType + "-view' />").appendTo(content)
			);
			header.activateButton(viewType);
		}

		if (currentView) {

			// in case the view should render a period of time that is completely hidden
			date = currentView.massageCurrentDate(date);

			// render or rerender the view
			if (
				!currentView.displaying ||
				!date.isWithin(currentView.intervalStart, currentView.intervalEnd) // implicit date window change
			) {
				if (elementVisible()) {

					currentView.display(date); // will call freezeContentHeight
					unfreezeContentHeight(); // immediately unfreeze regardless of whether display is async

					// need to do this after View::render, so dates are calculated
					updateHeaderTitle();
					updateTodayButton();

					getAndRenderEvents();
				}
			}
		}

		unfreezeContentHeight(); // undo any lone freezeContentHeight calls
		ignoreWindowResize--;
	}

	

	// Resizing
	// -----------------------------------------------------------------------------------


	t.getSuggestedViewHeight = function() {
		if (suggestedViewHeight === undefined) {
			calcSize();
		}
		return suggestedViewHeight;
	};


	t.isHeightAuto = function() {
		return options.contentHeight === 'auto' || options.height === 'auto';
	};
	
	
	function updateSize(shouldRecalc) {
		if (elementVisible()) {

			if (shouldRecalc) {
				_calcSize();
			}

			ignoreWindowResize++;
			currentView.updateSize(true); // isResize=true. will poll getSuggestedViewHeight() and isHeightAuto()
			ignoreWindowResize--;

			return true; // signal success
		}
	}


	function calcSize() {
		if (elementVisible()) {
			_calcSize();
		}
	}
	
	
	function _calcSize() { // assumes elementVisible
		if (typeof options.contentHeight === 'number') { // exists and not 'auto'
			suggestedViewHeight = options.contentHeight;
		}
		else if (typeof options.height === 'number') { // exists and not 'auto'
			suggestedViewHeight = options.height - (headerElement ? headerElement.outerHeight(true) : 0);
		}
		else {
			suggestedViewHeight = Math.round(content.width() / Math.max(options.aspectRatio, .5));
		}
	}
	
	
	function windowResize(ev) {
		if (
			!ignoreWindowResize &&
			ev.target === window && // so we don't process jqui "resize" events that have bubbled up
			currentView.start // view has already been rendered
		) {
			if (updateSize(true)) {
				currentView.trigger('windowResize', _element);
			}
		}
	}
	
	
	
	/* Event Fetching/Rendering
	-----------------------------------------------------------------------------*/
	// TODO: going forward, most of this stuff should be directly handled by the view


	function refetchEvents() { // can be called as an API method
		destroyEvents(); // so that events are cleared before user starts waiting for AJAX
		fetchAndRenderEvents();
	}


	function renderEvents() { // destroys old events if previously rendered
		if (elementVisible()) {
			freezeContentHeight();
			currentView.displayEvents(events);
			unfreezeContentHeight();
		}
	}


	function destroyEvents() {
		freezeContentHeight();
		currentView.clearEvents();
		unfreezeContentHeight();
	}
	

	function getAndRenderEvents() {
		if (!options.lazyFetching || isFetchNeeded(currentView.start, currentView.end)) {
			fetchAndRenderEvents();
		}
		else {
			renderEvents();
		}
	}


	function fetchAndRenderEvents() {
		fetchEvents(currentView.start, currentView.end);
			// ... will call reportEvents
			// ... which will call renderEvents
	}

	
	// called when event data arrives
	function reportEvents(_events) {
		events = _events;
		renderEvents();
	}


	// called when a single event's data has been changed
	function reportEventChange() {
		renderEvents();
	}



	/* Header Updating
	-----------------------------------------------------------------------------*/


	function updateHeaderTitle() {
		header.updateTitle(currentView.title);
	}


	function updateTodayButton() {
		var now = t.getNow();
		if (now.isWithin(currentView.intervalStart, currentView.intervalEnd)) {
			header.disableButton('today');
		}
		else {
			header.enableButton('today');
		}
	}
	


	/* Selection
	-----------------------------------------------------------------------------*/
	

	// this public method receives start/end dates in any format, with any timezone
	function select(zonedStartInput, zonedEndInput) {
		currentView.select(
			t.buildSelectSpan.apply(t, arguments)
		);
	}
	

	function unselect() { // safe to be called before renderView
		if (currentView) {
			currentView.unselect();
		}
	}
	
	
	
	/* Date
	-----------------------------------------------------------------------------*/
	
	
	function prev() {
		date = currentView.computePrevDate(date);
		renderView();
	}
	
	
	function next() {
		date = currentView.computeNextDate(date);
		renderView();
	}
	
	
	function prevYear() {
		date.add(-1, 'years');
		renderView();
	}
	
	
	function nextYear() {
		date.add(1, 'years');
		renderView();
	}
	
	
	function today() {
		date = t.getNow();
		renderView();
	}
	
	
	function gotoDate(zonedDateInput) {
		date = t.moment(zonedDateInput).stripZone();
		renderView();
	}
	
	
	function incrementDate(delta) {
		date.add(moment.duration(delta));
		renderView();
	}


	// Forces navigation to a view for the given date.
	// `viewType` can be a specific view name or a generic one like "week" or "day".
	function zoomTo(newDate, viewType) {
		var spec;

		viewType = viewType || 'day'; // day is default zoom
		spec = t.getViewSpec(viewType) || t.getUnitViewSpec(viewType);

		date = newDate.clone();
		renderView(spec ? spec.type : null);
	}
	
	
	// for external API
	function getDate() {
		return t.applyTimezone(date); // infuse the calendar's timezone
	}



	/* Height "Freezing"
	-----------------------------------------------------------------------------*/
	// TODO: move this into the view

	t.freezeContentHeight = freezeContentHeight;
	t.unfreezeContentHeight = unfreezeContentHeight;


	function freezeContentHeight() {
		content.css({
			width: '100%',
			height: content.height(),
			overflow: 'hidden'
		});
	}


	function unfreezeContentHeight() {
		content.css({
			width: '',
			height: '',
			overflow: ''
		});
	}
	
	
	
	/* Misc
	-----------------------------------------------------------------------------*/
	

	function getCalendar() {
		return t;
	}

	
	function getView() {
		return currentView;
	}
	
	
	function option(name, value) {
		if (value === undefined) {
			return options[name];
		}
		if (name == 'height' || name == 'contentHeight' || name == 'aspectRatio') {
			options[name] = value;
			updateSize(true); // true = allow recalculation of height
		}
	}
	
	
	function trigger(name, thisObj) { // overrides the Emitter's trigger method :(
		var args = Array.prototype.slice.call(arguments, 2);

		thisObj = thisObj || _element;
		this.triggerWith(name, thisObj, args); // Emitter's method

		if (options[name]) {
			return options[name].apply(thisObj, args);
		}
	}

	t.initialize();
}

;;

Calendar.defaults = {

	titleRangeSeparator: ' \u2014 ', // emphasized dash
	monthYearFormat: 'MMMM YYYY', // required for en. other languages rely on datepicker computable option

	defaultTimedEventDuration: '02:00:00',
	defaultAllDayEventDuration: { days: 1 },
	forceEventDuration: false,
	nextDayThreshold: '09:00:00', // 9am

	// display
	defaultView: 'month',
	aspectRatio: 1.35,
	header: {
		left: 'title',
		center: '',
		right: 'today prev,next'
	},
	weekends: true,
	weekNumbers: false,

	weekNumberTitle: 'W',
	weekNumberCalculation: 'local',
	
	//editable: false,

	//nowIndicator: false,

	scrollTime: '06:00:00',
	
	// event ajax
	lazyFetching: true,
	startParam: 'start',
	endParam: 'end',
	timezoneParam: 'timezone',

	timezone: false,

	//allDayDefault: undefined,

	// locale
	isRTL: false,
	buttonText: {
		prev: "prev",
		next: "next",
		prevYear: "prev year",
		nextYear: "next year",
		year: 'year', // TODO: locale files need to specify this
		today: 'today',
		month: 'month',
		week: 'week',
		day: 'day'
	},

	buttonIcons: {
		prev: 'left-single-arrow',
		next: 'right-single-arrow',
		prevYear: 'left-double-arrow',
		nextYear: 'right-double-arrow'
	},
	
	// jquery-ui theming
	theme: false,
	themeButtonIcons: {
		prev: 'circle-triangle-w',
		next: 'circle-triangle-e',
		prevYear: 'seek-prev',
		nextYear: 'seek-next'
	},

	//eventResizableFromStart: false,
	dragOpacity: .75,
	dragRevertDuration: 500,
	dragScroll: true,
	
	//selectable: false,
	unselectAuto: true,
	
	dropAccept: '*',

	eventOrder: 'title',

	eventLimit: false,
	eventLimitText: 'more',
	eventLimitClick: 'popover',
	dayPopoverFormat: 'LL',
	
	handleWindowResize: true,
	windowResizeDelay: 200 // milliseconds before an updateSize happens
	
};


Calendar.englishDefaults = { // used by lang.js
	dayPopoverFormat: 'dddd, MMMM D'
};


Calendar.rtlDefaults = { // right-to-left defaults
	header: { // TODO: smarter solution (first/center/last ?)
		left: 'next,prev today',
		center: '',
		right: 'title'
	},
	buttonIcons: {
		prev: 'right-single-arrow',
		next: 'left-single-arrow',
		prevYear: 'right-double-arrow',
		nextYear: 'left-double-arrow'
	},
	themeButtonIcons: {
		prev: 'circle-triangle-e',
		next: 'circle-triangle-w',
		nextYear: 'seek-prev',
		prevYear: 'seek-next'
	}
};

;;

var langOptionHash = FC.langs = {}; // initialize and expose


// TODO: document the structure and ordering of a FullCalendar lang file
// TODO: rename everything "lang" to "locale", like what the moment project did


// Initialize jQuery UI datepicker translations while using some of the translations
// Will set this as the default language for datepicker.
FC.datepickerLang = function(langCode, dpLangCode, dpOptions) {

	// get the FullCalendar internal option hash for this language. create if necessary
	var fcOptions = langOptionHash[langCode] || (langOptionHash[langCode] = {});

	// transfer some simple options from datepicker to fc
	fcOptions.isRTL = dpOptions.isRTL;
	fcOptions.weekNumberTitle = dpOptions.weekHeader;

	// compute some more complex options from datepicker
	$.each(dpComputableOptions, function(name, func) {
		fcOptions[name] = func(dpOptions);
	});

	// is jQuery UI Datepicker is on the page?
	if ($.datepicker) {

		// Register the language data.
		// FullCalendar and MomentJS use language codes like "pt-br" but Datepicker
		// does it like "pt-BR" or if it doesn't have the language, maybe just "pt".
		// Make an alias so the language can be referenced either way.
		$.datepicker.regional[dpLangCode] =
			$.datepicker.regional[langCode] = // alias
				dpOptions;

		// Alias 'en' to the default language data. Do this every time.
		$.datepicker.regional.en = $.datepicker.regional[''];

		// Set as Datepicker's global defaults.
		$.datepicker.setDefaults(dpOptions);
	}
};


// Sets FullCalendar-specific translations. Will set the language as the global default.
FC.lang = function(langCode, newFcOptions) {
	var fcOptions;
	var momOptions;

	// get the FullCalendar internal option hash for this language. create if necessary
	fcOptions = langOptionHash[langCode] || (langOptionHash[langCode] = {});

	// provided new options for this language? merge them in
	if (newFcOptions) {
		fcOptions = langOptionHash[langCode] = mergeOptions([ fcOptions, newFcOptions ]);
	}

	// compute language options that weren't defined.
	// always do this. newFcOptions can be undefined when initializing from i18n file,
	// so no way to tell if this is an initialization or a default-setting.
	momOptions = getMomentLocaleData(langCode); // will fall back to en
	$.each(momComputableOptions, function(name, func) {
		if (fcOptions[name] == null) {
			fcOptions[name] = func(momOptions, fcOptions);
		}
	});

	// set it as the default language for FullCalendar
	Calendar.defaults.lang = langCode;
};


// NOTE: can't guarantee any of these computations will run because not every language has datepicker
// configs, so make sure there are English fallbacks for these in the defaults file.
var dpComputableOptions = {

	buttonText: function(dpOptions) {
		return {
			// the translations sometimes wrongly contain HTML entities
			prev: stripHtmlEntities(dpOptions.prevText),
			next: stripHtmlEntities(dpOptions.nextText),
			today: stripHtmlEntities(dpOptions.currentText)
		};
	},

	// Produces format strings like "MMMM YYYY" -> "September 2014"
	monthYearFormat: function(dpOptions) {
		return dpOptions.showMonthAfterYear ?
			'YYYY[' + dpOptions.yearSuffix + '] MMMM' :
			'MMMM YYYY[' + dpOptions.yearSuffix + ']';
	}

};

var momComputableOptions = {

	// Produces format strings like "ddd M/D" -> "Fri 9/15"
	dayOfMonthFormat: function(momOptions, fcOptions) {
		var format = momOptions.longDateFormat('l'); // for the format like "M/D/YYYY"

		// strip the year off the edge, as well as other misc non-whitespace chars
		format = format.replace(/^Y+[^\w\s]*|[^\w\s]*Y+$/g, '');

		if (fcOptions.isRTL) {
			format += ' ddd'; // for RTL, add day-of-week to end
		}
		else {
			format = 'ddd ' + format; // for LTR, add day-of-week to beginning
		}
		return format;
	},

	// Produces format strings like "h:mma" -> "6:00pm"
	mediumTimeFormat: function(momOptions) { // can't be called `timeFormat` because collides with option
		return momOptions.longDateFormat('LT')
			.replace(/\s*a$/i, 'a'); // convert AM/PM/am/pm to lowercase. remove any spaces beforehand
	},

	// Produces format strings like "h(:mm)a" -> "6pm" / "6:30pm"
	smallTimeFormat: function(momOptions) {
		return momOptions.longDateFormat('LT')
			.replace(':mm', '(:mm)')
			.replace(/(\Wmm)$/, '($1)') // like above, but for foreign langs
			.replace(/\s*a$/i, 'a'); // convert AM/PM/am/pm to lowercase. remove any spaces beforehand
	},

	// Produces format strings like "h(:mm)t" -> "6p" / "6:30p"
	extraSmallTimeFormat: function(momOptions) {
		return momOptions.longDateFormat('LT')
			.replace(':mm', '(:mm)')
			.replace(/(\Wmm)$/, '($1)') // like above, but for foreign langs
			.replace(/\s*a$/i, 't'); // convert to AM/PM/am/pm to lowercase one-letter. remove any spaces beforehand
	},

	// Produces format strings like "ha" / "H" -> "6pm" / "18"
	hourFormat: function(momOptions) {
		return momOptions.longDateFormat('LT')
			.replace(':mm', '')
			.replace(/(\Wmm)$/, '') // like above, but for foreign langs
			.replace(/\s*a$/i, 'a'); // convert AM/PM/am/pm to lowercase. remove any spaces beforehand
	},

	// Produces format strings like "h:mm" -> "6:30" (with no AM/PM)
	noMeridiemTimeFormat: function(momOptions) {
		return momOptions.longDateFormat('LT')
			.replace(/\s*a$/i, ''); // remove trailing AM/PM
	}

};


// options that should be computed off live calendar options (considers override options)
// TODO: best place for this? related to lang?
// TODO: flipping text based on isRTL is a bad idea because the CSS `direction` might want to handle it
var instanceComputableOptions = {

	// Produces format strings for results like "Mo 16"
	smallDayDateFormat: function(options) {
		return options.isRTL ?
			'D dd' :
			'dd D';
	},

	// Produces format strings for results like "Wk 5"
	weekFormat: function(options) {
		return options.isRTL ?
			'w[ ' + options.weekNumberTitle + ']' :
			'[' + options.weekNumberTitle + ' ]w';
	},

	// Produces format strings for results like "Wk5"
	smallWeekFormat: function(options) {
		return options.isRTL ?
			'w[' + options.weekNumberTitle + ']' :
			'[' + options.weekNumberTitle + ']w';
	}

};

function populateInstanceComputableOptions(options) {
	$.each(instanceComputableOptions, function(name, func) {
		if (options[name] == null) {
			options[name] = func(options);
		}
	});
}


// Returns moment's internal locale data. If doesn't exist, returns English.
// Works with moment-pre-2.8
function getMomentLocaleData(langCode) {
	var func = moment.localeData || moment.langData;
	return func.call(moment, langCode) ||
		func.call(moment, 'en'); // the newer localData could return null, so fall back to en
}


// Initialize English by forcing computation of moment-derived options.
// Also, sets it as the default.
FC.lang('en', Calendar.englishDefaults);

;;

/* Top toolbar area with buttons and title
----------------------------------------------------------------------------------------------------------------------*/
// TODO: rename all header-related things to "toolbar"

function Header(calendar, options) {
	var t = this;
	
	// exports
	t.render = render;
	t.removeElement = removeElement;
	t.updateTitle = updateTitle;
	t.activateButton = activateButton;
	t.deactivateButton = deactivateButton;
	t.disableButton = disableButton;
	t.enableButton = enableButton;
	t.getViewsWithButtons = getViewsWithButtons;
	
	// locals
	var el = $();
	var viewsWithButtons = [];
	var tm;


	function render() {
		var sections = options.header;

		tm = options.theme ? 'ui' : 'fc';

		if (sections) {
			el = $("<div class='fc-toolbar'/>")
				.append(renderSection('left'))
				.append(renderSection('right'))
				.append(renderSection('center'))
				.append('<div class="fc-clear"/>');

			return el;
		}
	}
	
	
	function removeElement() {
		el.remove();
		el = $();
	}
	
	
	function renderSection(position) {
		var sectionEl = $('<div class="fc-' + position + '"/>');
		var buttonStr = options.header[position];

		if (buttonStr) {
			$.each(buttonStr.split(' '), function(i) {
				var groupChildren = $();
				var isOnlyButtons = true;
				var groupEl;

				$.each(this.split(','), function(j, buttonName) {
					var customButtonProps;
					var viewSpec;
					var buttonClick;
					var overrideText; // text explicitly set by calendar's constructor options. overcomes icons
					var defaultText;
					var themeIcon;
					var normalIcon;
					var innerHtml;
					var classes;
					var button; // the element

					if (buttonName == 'title') {
						groupChildren = groupChildren.add($('<h2>&nbsp;</h2>')); // we always want it to take up height
						isOnlyButtons = false;
					}
					else {
						if ((customButtonProps = (calendar.options.customButtons || {})[buttonName])) {
							buttonClick = function(ev) {
								if (customButtonProps.click) {
									customButtonProps.click.call(button[0], ev);
								}
							};
							overrideText = ''; // icons will override text
							defaultText = customButtonProps.text;
						}
						else if ((viewSpec = calendar.getViewSpec(buttonName))) {
							buttonClick = function() {
								calendar.changeView(buttonName);
							};
							viewsWithButtons.push(buttonName);
							overrideText = viewSpec.buttonTextOverride;
							defaultText = viewSpec.buttonTextDefault;
						}
						else if (calendar[buttonName]) { // a calendar method
							buttonClick = function() {
								calendar[buttonName]();
							};
							overrideText = (calendar.overrides.buttonText || {})[buttonName];
							defaultText = options.buttonText[buttonName]; // everything else is considered default
						}

						if (buttonClick) {

							themeIcon =
								customButtonProps ?
									customButtonProps.themeIcon :
									options.themeButtonIcons[buttonName];

							normalIcon =
								customButtonProps ?
									customButtonProps.icon :
									options.buttonIcons[buttonName];

							if (overrideText) {
								innerHtml = htmlEscape(overrideText);
							}
							else if (themeIcon && options.theme) {
								innerHtml = "<span class='ui-icon ui-icon-" + themeIcon + "'></span>";
							}
							else if (normalIcon && !options.theme) {
								innerHtml = "<span class='fc-icon fc-icon-" + normalIcon + "'></span>";
							}
							else {
								innerHtml = htmlEscape(defaultText);
							}

							classes = [
								'fc-' + buttonName + '-button',
								tm + '-button',
								tm + '-state-default'
							];

							button = $( // type="button" so that it doesn't submit a form
								'<button type="button" class="' + classes.join(' ') + '">' +
									innerHtml +
								'</button>'
								)
								.click(function(ev) {
									// don't process clicks for disabled buttons
									if (!button.hasClass(tm + '-state-disabled')) {

										buttonClick(ev);

										// after the click action, if the button becomes the "active" tab, or disabled,
										// it should never have a hover class, so remove it now.
										if (
											button.hasClass(tm + '-state-active') ||
											button.hasClass(tm + '-state-disabled')
										) {
											button.removeClass(tm + '-state-hover');
										}
									}
								})
								.mousedown(function() {
									// the *down* effect (mouse pressed in).
									// only on buttons that are not the "active" tab, or disabled
									button
										.not('.' + tm + '-state-active')
										.not('.' + tm + '-state-disabled')
										.addClass(tm + '-state-down');
								})
								.mouseup(function() {
									// undo the *down* effect
									button.removeClass(tm + '-state-down');
								})
								.hover(
									function() {
										// the *hover* effect.
										// only on buttons that are not the "active" tab, or disabled
										button
											.not('.' + tm + '-state-active')
											.not('.' + tm + '-state-disabled')
											.addClass(tm + '-state-hover');
									},
									function() {
										// undo the *hover* effect
										button
											.removeClass(tm + '-state-hover')
											.removeClass(tm + '-state-down'); // if mouseleave happens before mouseup
									}
								);

							groupChildren = groupChildren.add(button);
						}
					}
				});

				if (isOnlyButtons) {
					groupChildren
						.first().addClass(tm + '-corner-left').end()
						.last().addClass(tm + '-corner-right').end();
				}

				if (groupChildren.length > 1) {
					groupEl = $('<div/>');
					if (isOnlyButtons) {
						groupEl.addClass('fc-button-group');
					}
					groupEl.append(groupChildren);
					sectionEl.append(groupEl);
				}
				else {
					sectionEl.append(groupChildren); // 1 or 0 children
				}
			});
		}

		return sectionEl;
	}
	
	
	function updateTitle(text) {
		el.find('h2').text(text);
	}
	
	
	function activateButton(buttonName) {
		el.find('.fc-' + buttonName + '-button')
			.addClass(tm + '-state-active');
	}
	
	
	function deactivateButton(buttonName) {
		el.find('.fc-' + buttonName + '-button')
			.removeClass(tm + '-state-active');
	}
	
	
	function disableButton(buttonName) {
		el.find('.fc-' + buttonName + '-button')
			.attr('disabled', 'disabled')
			.addClass(tm + '-state-disabled');
	}
	
	
	function enableButton(buttonName) {
		el.find('.fc-' + buttonName + '-button')
			.removeAttr('disabled')
			.removeClass(tm + '-state-disabled');
	}


	function getViewsWithButtons() {
		return viewsWithButtons;
	}

}

;;

FC.sourceNormalizers = [];
FC.sourceFetchers = [];

var ajaxDefaults = {
	dataType: 'json',
	cache: false
};

var eventGUID = 1;


function EventManager(options) { // assumed to be a calendar
	var t = this;
	
	
	// exports
	t.isFetchNeeded = isFetchNeeded;
	t.fetchEvents = fetchEvents;
	t.addEventSource = addEventSource;
	t.removeEventSource = removeEventSource;
	t.updateEvent = updateEvent;
	t.renderEvent = renderEvent;
	t.removeEvents = removeEvents;
	t.clientEvents = clientEvents;
	t.mutateEvent = mutateEvent;
	t.normalizeEventDates = normalizeEventDates;
	t.normalizeEventTimes = normalizeEventTimes;
	
	
	// imports
	var reportEvents = t.reportEvents;
	
	
	// locals
	var stickySource = { events: [] };
	var sources = [ stickySource ];
	var rangeStart, rangeEnd;
	var currentFetchID = 0;
	var pendingSourceCnt = 0;
	var cache = []; // holds events that have already been expanded


	$.each(
		(options.events ? [ options.events ] : []).concat(options.eventSources || []),
		function(i, sourceInput) {
			var source = buildEventSource(sourceInput);
			if (source) {
				sources.push(source);
			}
		}
	);
	
	
	
	/* Fetching
	-----------------------------------------------------------------------------*/


	// start and end are assumed to be unzoned
	function isFetchNeeded(start, end) {
		return !rangeStart || // nothing has been fetched yet?
			start < rangeStart || end > rangeEnd; // is part of the new range outside of the old range?
	}
	
	
	function fetchEvents(start, end) {
		rangeStart = start;
		rangeEnd = end;
		cache = [];
		var fetchID = ++currentFetchID;
		var len = sources.length;
		pendingSourceCnt = len;
		for (var i=0; i<len; i++) {
			fetchEventSource(sources[i], fetchID);
		}
	}
	
	
	function fetchEventSource(source, fetchID) {
		_fetchEventSource(source, function(eventInputs) {
			var isArraySource = $.isArray(source.events);
			var i, eventInput;
			var abstractEvent;

			if (fetchID == currentFetchID) {

				if (eventInputs) {
					for (i = 0; i < eventInputs.length; i++) {
						eventInput = eventInputs[i];

						if (isArraySource) { // array sources have already been convert to Event Objects
							abstractEvent = eventInput;
						}
						else {
							abstractEvent = buildEventFromInput(eventInput, source);
						}

						if (abstractEvent) { // not false (an invalid event)
							cache.push.apply(
								cache,
								expandEvent(abstractEvent) // add individual expanded events to the cache
							);
						}
					}
				}

				pendingSourceCnt--;
				if (!pendingSourceCnt) {
					reportEvents(cache);
				}
			}
		});
	}
	
	
	function _fetchEventSource(source, callback) {
		var i;
		var fetchers = FC.sourceFetchers;
		var res;

		for (i=0; i<fetchers.length; i++) {
			res = fetchers[i].call(
				t, // this, the Calendar object
				source,
				rangeStart.clone(),
				rangeEnd.clone(),
				options.timezone,
				callback
			);

			if (res === true) {
				// the fetcher is in charge. made its own async request
				return;
			}
			else if (typeof res == 'object') {
				// the fetcher returned a new source. process it
				_fetchEventSource(res, callback);
				return;
			}
		}

		var events = source.events;
		if (events) {
			if ($.isFunction(events)) {
				t.pushLoading();
				events.call(
					t, // this, the Calendar object
					rangeStart.clone(),
					rangeEnd.clone(),
					options.timezone,
					function(events) {
						callback(events);
						t.popLoading();
					}
				);
			}
			else if ($.isArray(events)) {
				callback(events);
			}
			else {
				callback();
			}
		}else{
			var url = source.url;
			if (url) {
				var success = source.success;
				var error = source.error;
				var complete = source.complete;

				// retrieve any outbound GET/POST $.ajax data from the options
				var customData;
				if ($.isFunction(source.data)) {
					// supplied as a function that returns a key/value object
					customData = source.data();
				}
				else {
					// supplied as a straight key/value object
					customData = source.data;
				}

				// use a copy of the custom data so we can modify the parameters
				// and not affect the passed-in object.
				var data = $.extend({}, customData || {});

				var startParam = firstDefined(source.startParam, options.startParam);
				var endParam = firstDefined(source.endParam, options.endParam);
				var timezoneParam = firstDefined(source.timezoneParam, options.timezoneParam);

				if (startParam) {
					data[startParam] = rangeStart.format();
				}
				if (endParam) {
					data[endParam] = rangeEnd.format();
				}
				if (options.timezone && options.timezone != 'local') {
					data[timezoneParam] = options.timezone;
				}

				t.pushLoading();
				$.ajax($.extend({}, ajaxDefaults, source, {
					data: data,
					success: function(events) {
						events = events || [];
						var res = applyAll(success, this, arguments);
						if ($.isArray(res)) {
							events = res;
						}
						callback(events);
					},
					error: function() {
						applyAll(error, this, arguments);
						callback();
					},
					complete: function() {
						applyAll(complete, this, arguments);
						t.popLoading();
					}
				}));
			}else{
				callback();
			}
		}
	}
	
	
	
	/* Sources
	-----------------------------------------------------------------------------*/
	

	function addEventSource(sourceInput) {
		var source = buildEventSource(sourceInput);
		if (source) {
			sources.push(source);
			pendingSourceCnt++;
			fetchEventSource(source, currentFetchID); // will eventually call reportEvents
		}
	}


	function buildEventSource(sourceInput) { // will return undefined if invalid source
		var normalizers = FC.sourceNormalizers;
		var source;
		var i;

		if ($.isFunction(sourceInput) || $.isArray(sourceInput)) {
			source = { events: sourceInput };
		}
		else if (typeof sourceInput === 'string') {
			source = { url: sourceInput };
		}
		else if (typeof sourceInput === 'object') {
			source = $.extend({}, sourceInput); // shallow copy
		}

		if (source) {

			// TODO: repeat code, same code for event classNames
			if (source.className) {
				if (typeof source.className === 'string') {
					source.className = source.className.split(/\s+/);
				}
				// otherwise, assumed to be an array
			}
			else {
				source.className = [];
			}

			// for array sources, we convert to standard Event Objects up front
			if ($.isArray(source.events)) {
				source.origArray = source.events; // for removeEventSource
				source.events = $.map(source.events, function(eventInput) {
					return buildEventFromInput(eventInput, source);
				});
			}

			for (i=0; i<normalizers.length; i++) {
				normalizers[i].call(t, source);
			}

			return source;
		}
	}


	function removeEventSource(source) {
		sources = $.grep(sources, function(src) {
			return !isSourcesEqual(src, source);
		});
		// remove all client events from that source
		cache = $.grep(cache, function(e) {
			return !isSourcesEqual(e.source, source);
		});
		reportEvents(cache);
	}


	function isSourcesEqual(source1, source2) {
		return source1 && source2 && getSourcePrimitive(source1) == getSourcePrimitive(source2);
	}


	function getSourcePrimitive(source) {
		return (
			(typeof source === 'object') ? // a normalized event source?
				(source.origArray || source.googleCalendarId || source.url || source.events) : // get the primitive
				null
		) ||
		source; // the given argument *is* the primitive
	}
	
	
	
	/* Manipulation
	-----------------------------------------------------------------------------*/


	// Only ever called from the externally-facing API
	function updateEvent(event) {

		// massage start/end values, even if date string values
		event.start = t.moment(event.start);
		if (event.end) {
			event.end = t.moment(event.end);
		}
		else {
			event.end = null;
		}

		mutateEvent(event, getMiscEventProps(event)); // will handle start/end/allDay normalization
		reportEvents(cache); // reports event modifications (so we can redraw)
	}


	// Returns a hash of misc event properties that should be copied over to related events.
	function getMiscEventProps(event) {
		var props = {};

		$.each(event, function(name, val) {
			if (isMiscEventPropName(name)) {
				if (val !== undefined && isAtomic(val)) { // a defined non-object
					props[name] = val;
				}
			}
		});

		return props;
	}

	// non-date-related, non-id-related, non-secret
	function isMiscEventPropName(name) {
		return !/^_|^(id|allDay|start|end)$/.test(name);
	}

	
	// returns the expanded events that were created
	function renderEvent(eventInput, stick) {
		var abstractEvent = buildEventFromInput(eventInput);
		var events;
		var i, event;

		if (abstractEvent) { // not false (a valid input)
			events = expandEvent(abstractEvent);

			for (i = 0; i < events.length; i++) {
				event = events[i];

				if (!event.source) {
					if (stick) {
						stickySource.events.push(event);
						event.source = stickySource;
					}
					cache.push(event);
				}
			}

			reportEvents(cache);

			return events;
		}

		return [];
	}
	
	
	function removeEvents(filter) {
		var eventID;
		var i;

		if (filter == null) { // null or undefined. remove all events
			filter = function() { return true; }; // will always match
		}
		else if (!$.isFunction(filter)) { // an event ID
			eventID = filter + '';
			filter = function(event) {
				return event._id == eventID;
			};
		}

		// Purge event(s) from our local cache
		cache = $.grep(cache, filter, true); // inverse=true

		// Remove events from array sources.
		// This works because they have been converted to official Event Objects up front.
		// (and as a result, event._id has been calculated).
		for (i=0; i<sources.length; i++) {
			if ($.isArray(sources[i].events)) {
				sources[i].events = $.grep(sources[i].events, filter, true);
			}
		}

		reportEvents(cache);
	}
	
	
	function clientEvents(filter) {
		if ($.isFunction(filter)) {
			return $.grep(cache, filter);
		}
		else if (filter != null) { // not null, not undefined. an event ID
			filter += '';
			return $.grep(cache, function(e) {
				return e._id == filter;
			});
		}
		return cache; // else, return all
	}
	
	
	
	/* Event Normalization
	-----------------------------------------------------------------------------*/


	// Given a raw object with key/value properties, returns an "abstract" Event object.
	// An "abstract" event is an event that, if recurring, will not have been expanded yet.
	// Will return `false` when input is invalid.
	// `source` is optional
	function buildEventFromInput(input, source) {
		var out = {};
		var start, end;
		var allDay;

		if (options.eventDataTransform) {
			input = options.eventDataTransform(input);
		}
		if (source && source.eventDataTransform) {
			input = source.eventDataTransform(input);
		}

		// Copy all properties over to the resulting object.
		// The special-case properties will be copied over afterwards.
		$.extend(out, input);

		if (source) {
			out.source = source;
		}

		out._id = input._id || (input.id === undefined ? '_fc' + eventGUID++ : input.id + '');

		if (input.className) {
			if (typeof input.className == 'string') {
				out.className = input.className.split(/\s+/);
			}
			else { // assumed to be an array
				out.className = input.className;
			}
		}
		else {
			out.className = [];
		}

		start = input.start || input.date; // "date" is an alias for "start"
		end = input.end;

		// parse as a time (Duration) if applicable
		if (isTimeString(start)) {
			start = moment.duration(start);
		}
		if (isTimeString(end)) {
			end = moment.duration(end);
		}

		if (input.dow || moment.isDuration(start) || moment.isDuration(end)) {

			// the event is "abstract" (recurring) so don't calculate exact start/end dates just yet
			out.start = start ? moment.duration(start) : null; // will be a Duration or null
			out.end = end ? moment.duration(end) : null; // will be a Duration or null
			out._recurring = true; // our internal marker
		}
		else {

			if (start) {
				start = t.moment(start);
				if (!start.isValid()) {
					return false;
				}
			}

			if (end) {
				end = t.moment(end);
				if (!end.isValid()) {
					end = null; // let defaults take over
				}
			}

			allDay = input.allDay;
			if (allDay === undefined) { // still undefined? fallback to default
				allDay = firstDefined(
					source ? source.allDayDefault : undefined,
					options.allDayDefault
				);
				// still undefined? normalizeEventDates will calculate it
			}

			assignDatesToEvent(start, end, allDay, out);
		}

		return out;
	}


	// Normalizes and assigns the given dates to the given partially-formed event object.
	// NOTE: mutates the given start/end moments. does not make a copy.
	function assignDatesToEvent(start, end, allDay, event) {
		event.start = start;
		event.end = end;
		event.allDay = allDay;
		normalizeEventDates(event);
		backupEventDates(event);
	}


	// Ensures proper values for allDay/start/end. Accepts an Event object, or a plain object with event-ish properties.
	// NOTE: Will modify the given object.
	function normalizeEventDates(eventProps) {

		normalizeEventTimes(eventProps);

		if (eventProps.end && !eventProps.end.isAfter(eventProps.start)) {
			eventProps.end = null;
		}

		if (!eventProps.end) {
			if (options.forceEventDuration) {
				eventProps.end = t.getDefaultEventEnd(eventProps.allDay, eventProps.start);
			}
			else {
				eventProps.end = null;
			}
		}
	}


	// Ensures the allDay property exists and the timeliness of the start/end dates are consistent
	function normalizeEventTimes(eventProps) {
		if (eventProps.allDay == null) {
			eventProps.allDay = !(eventProps.start.hasTime() || (eventProps.end && eventProps.end.hasTime()));
		}

		if (eventProps.allDay) {
			eventProps.start.stripTime();
			if (eventProps.end) {
				// TODO: consider nextDayThreshold here? If so, will require a lot of testing and adjustment
				eventProps.end.stripTime();
			}
		}
		else {
			if (!eventProps.start.hasTime()) {
				eventProps.start = t.applyTimezone(eventProps.start.time(0)); // will assign a 00:00 time
			}
			if (eventProps.end && !eventProps.end.hasTime()) {
				eventProps.end = t.applyTimezone(eventProps.end.time(0)); // will assign a 00:00 time
			}
		}
	}


	// If the given event is a recurring event, break it down into an array of individual instances.
	// If not a recurring event, return an array with the single original event.
	// If given a falsy input (probably because of a failed buildEventFromInput call), returns an empty array.
	// HACK: can override the recurring window by providing custom rangeStart/rangeEnd (for businessHours).
	function expandEvent(abstractEvent, _rangeStart, _rangeEnd) {
		var events = [];
		var dowHash;
		var dow;
		var i;
		var date;
		var startTime, endTime;
		var start, end;
		var event;

		_rangeStart = _rangeStart || rangeStart;
		_rangeEnd = _rangeEnd || rangeEnd;

		if (abstractEvent) {
			if (abstractEvent._recurring) {

				// make a boolean hash as to whether the event occurs on each day-of-week
				if ((dow = abstractEvent.dow)) {
					dowHash = {};
					for (i = 0; i < dow.length; i++) {
						dowHash[dow[i]] = true;
					}
				}

				// iterate through every day in the current range
				date = _rangeStart.clone().stripTime(); // holds the date of the current day
				while (date.isBefore(_rangeEnd)) {

					if (!dowHash || dowHash[date.day()]) { // if everyday, or this particular day-of-week

						startTime = abstractEvent.start; // the stored start and end properties are times (Durations)
						endTime = abstractEvent.end; // "
						start = date.clone();
						end = null;

						if (startTime) {
							start = start.time(startTime);
						}
						if (endTime) {
							end = date.clone().time(endTime);
						}

						event = $.extend({}, abstractEvent); // make a copy of the original
						assignDatesToEvent(
							start, end,
							!startTime && !endTime, // allDay?
							event
						);
						events.push(event);
					}

					date.add(1, 'days');
				}
			}
			else {
				events.push(abstractEvent); // return the original event. will be a one-item array
			}
		}

		return events;
	}



	/* Event Modification Math
	-----------------------------------------------------------------------------------------*/


	// Modifies an event and all related events by applying the given properties.
	// Special date-diffing logic is used for manipulation of dates.
	// If `props` does not contain start/end dates, the updated values are assumed to be the event's current start/end.
	// All date comparisons are done against the event's pristine _start and _end dates.
	// Returns an object with delta information and a function to undo all operations.
	// For making computations in a granularity greater than day/time, specify largeUnit.
	// NOTE: The given `newProps` might be mutated for normalization purposes.
	function mutateEvent(event, newProps, largeUnit) {
		var miscProps = {};
		var oldProps;
		var clearEnd;
		var startDelta;
		var endDelta;
		var durationDelta;
		var undoFunc;

		// diffs the dates in the appropriate way, returning a duration
		function diffDates(date1, date0) { // date1 - date0
			if (largeUnit) {
				return diffByUnit(date1, date0, largeUnit);
			}
			else if (newProps.allDay) {
				return diffDay(date1, date0);
			}
			else {
				return diffDayTime(date1, date0);
			}
		}

		newProps = newProps || {};

		// normalize new date-related properties
		if (!newProps.start) {
			newProps.start = event.start.clone();
		}
		if (newProps.end === undefined) {
			newProps.end = event.end ? event.end.clone() : null;
		}
		if (newProps.allDay == null) { // is null or undefined?
			newProps.allDay = event.allDay;
		}
		normalizeEventDates(newProps);

		// create normalized versions of the original props to compare against
		// need a real end value, for diffing
		oldProps = {
			start: event._start.clone(),
			end: event._end ? event._end.clone() : t.getDefaultEventEnd(event._allDay, event._start),
			allDay: newProps.allDay // normalize the dates in the same regard as the new properties
		};
		normalizeEventDates(oldProps);

		// need to clear the end date if explicitly changed to null
		clearEnd = event._end !== null && newProps.end === null;

		// compute the delta for moving the start date
		startDelta = diffDates(newProps.start, oldProps.start);

		// compute the delta for moving the end date
		if (newProps.end) {
			endDelta = diffDates(newProps.end, oldProps.end);
			durationDelta = endDelta.subtract(startDelta);
		}
		else {
			durationDelta = null;
		}

		// gather all non-date-related properties
		$.each(newProps, function(name, val) {
			if (isMiscEventPropName(name)) {
				if (val !== undefined) {
					miscProps[name] = val;
				}
			}
		});

		// apply the operations to the event and all related events
		undoFunc = mutateEvents(
			clientEvents(event._id), // get events with this ID
			clearEnd,
			newProps.allDay,
			startDelta,
			durationDelta,
			miscProps
		);

		return {
			dateDelta: startDelta,
			durationDelta: durationDelta,
			undo: undoFunc
		};
	}


	// Modifies an array of events in the following ways (operations are in order):
	// - clear the event's `end`
	// - convert the event to allDay
	// - add `dateDelta` to the start and end
	// - add `durationDelta` to the event's duration
	// - assign `miscProps` to the event
	//
	// Returns a function that can be called to undo all the operations.
	//
	// TODO: don't use so many closures. possible memory issues when lots of events with same ID.
	//
	function mutateEvents(events, clearEnd, allDay, dateDelta, durationDelta, miscProps) {
		var isAmbigTimezone = t.getIsAmbigTimezone();
		var undoFunctions = [];

		// normalize zero-length deltas to be null
		if (dateDelta && !dateDelta.valueOf()) { dateDelta = null; }
		if (durationDelta && !durationDelta.valueOf()) { durationDelta = null; }

		$.each(events, function(i, event) {
			var oldProps;
			var newProps;

			// build an object holding all the old values, both date-related and misc.
			// for the undo function.
			oldProps = {
				start: event.start.clone(),
				end: event.end ? event.end.clone() : null,
				allDay: event.allDay
			};
			$.each(miscProps, function(name) {
				oldProps[name] = event[name];
			});

			// new date-related properties. work off the original date snapshot.
			// ok to use references because they will be thrown away when backupEventDates is called.
			newProps = {
				start: event._start,
				end: event._end,
				allDay: allDay // normalize the dates in the same regard as the new properties
			};
			normalizeEventDates(newProps); // massages start/end/allDay

			// strip or ensure the end date
			if (clearEnd) {
				newProps.end = null;
			}
			else if (durationDelta && !newProps.end) { // the duration translation requires an end date
				newProps.end = t.getDefaultEventEnd(newProps.allDay, newProps.start);
			}

			if (dateDelta) {
				newProps.start.add(dateDelta);
				if (newProps.end) {
					newProps.end.add(dateDelta);
				}
			}

			if (durationDelta) {
				newProps.end.add(durationDelta); // end already ensured above
			}

			// if the dates have changed, and we know it is impossible to recompute the
			// timezone offsets, strip the zone.
			if (
				isAmbigTimezone &&
				!newProps.allDay &&
				(dateDelta || durationDelta)
			) {
				newProps.start.stripZone();
				if (newProps.end) {
					newProps.end.stripZone();
				}
			}

			$.extend(event, miscProps, newProps); // copy over misc props, then date-related props
			backupEventDates(event); // regenerate internal _start/_end/_allDay

			undoFunctions.push(function() {
				$.extend(event, oldProps);
				backupEventDates(event); // regenerate internal _start/_end/_allDay
			});
		});

		return function() {
			for (var i = 0; i < undoFunctions.length; i++) {
				undoFunctions[i]();
			}
		};
	}


	/* Business Hours
	-----------------------------------------------------------------------------------------*/

	t.getBusinessHoursEvents = getBusinessHoursEvents;


	// Returns an array of events as to when the business hours occur in the given view.
	// Abuse of our event system :(
	function getBusinessHoursEvents(wholeDay) {
		var optionVal = options.businessHours;
		var defaultVal = {
			className: 'fc-nonbusiness',
			start: '09:00',
			end: '17:00',
			dow: [ 1, 2, 3, 4, 5 ], // monday - friday
			rendering: 'inverse-background'
		};
		var view = t.getView();
		var eventInput;

		if (optionVal) { // `true` (which means "use the defaults") or an override object
			eventInput = $.extend(
				{}, // copy to a new object in either case
				defaultVal,
				typeof optionVal === 'object' ? optionVal : {} // override the defaults
			);
		}

		if (eventInput) {

			// if a whole-day series is requested, clear the start/end times
			if (wholeDay) {
				eventInput.start = null;
				eventInput.end = null;
			}

			return expandEvent(
				buildEventFromInput(eventInput),
				view.start,
				view.end
			);
		}

		return [];
	}


	/* Overlapping / Constraining
	-----------------------------------------------------------------------------------------*/

	t.isEventSpanAllowed = isEventSpanAllowed;
	t.isExternalSpanAllowed = isExternalSpanAllowed;
	t.isSelectionSpanAllowed = isSelectionSpanAllowed;


	// Determines if the given event can be relocated to the given span (unzoned start/end with other misc data)
	function isEventSpanAllowed(span, event) {
		var source = event.source || {};
		var constraint = firstDefined(
			event.constraint,
			source.constraint,
			options.eventConstraint
		);
		var overlap = firstDefined(
			event.overlap,
			source.overlap,
			options.eventOverlap
		);
		return isSpanAllowed(span, constraint, overlap, event);
	}


	// Determines if an external event can be relocated to the given span (unzoned start/end with other misc data)
	function isExternalSpanAllowed(eventSpan, eventLocation, eventProps) {
		var eventInput;
		var event;

		// note: very similar logic is in View's reportExternalDrop
		if (eventProps) {
			eventInput = $.extend({}, eventProps, eventLocation);
			event = expandEvent(buildEventFromInput(eventInput))[0];
		}

		if (event) {
			return isEventSpanAllowed(eventSpan, event);
		}
		else { // treat it as a selection

			return isSelectionSpanAllowed(eventSpan);
		}
	}


	// Determines the given span (unzoned start/end with other misc data) can be selected.
	function isSelectionSpanAllowed(span) {
		return isSpanAllowed(span, options.selectConstraint, options.selectOverlap);
	}


	// Returns true if the given span (caused by an event drop/resize or a selection) is allowed to exist
	// according to the constraint/overlap settings.
	// `event` is not required if checking a selection.
	function isSpanAllowed(span, constraint, overlap, event) {
		var constraintEvents;
		var anyContainment;
		var peerEvents;
		var i, peerEvent;
		var peerOverlap;

		// the range must be fully contained by at least one of produced constraint events
		if (constraint != null) {

			// not treated as an event! intermediate data structure
			// TODO: use ranges in the future
			constraintEvents = constraintToEvents(constraint);

			anyContainment = false;
			for (i = 0; i < constraintEvents.length; i++) {
				if (eventContainsRange(constraintEvents[i], span)) {
					anyContainment = true;
					break;
				}
			}

			if (!anyContainment) {
				return false;
			}
		}

		peerEvents = t.getPeerEvents(span, event);

		for (i = 0; i < peerEvents.length; i++)  {
			peerEvent = peerEvents[i];

			// there needs to be an actual intersection before disallowing anything
			if (eventIntersectsRange(peerEvent, span)) {

				// evaluate overlap for the given range and short-circuit if necessary
				if (overlap === false) {
					return false;
				}
				// if the event's overlap is a test function, pass the peer event in question as the first param
				else if (typeof overlap === 'function' && !overlap(peerEvent, event)) {
					return false;
				}

				// if we are computing if the given range is allowable for an event, consider the other event's
				// EventObject-specific or Source-specific `overlap` property
				if (event) {
					peerOverlap = firstDefined(
						peerEvent.overlap,
						(peerEvent.source || {}).overlap
						// we already considered the global `eventOverlap`
					);
					if (peerOverlap === false) {
						return false;
					}
					// if the peer event's overlap is a test function, pass the subject event as the first param
					if (typeof peerOverlap === 'function' && !peerOverlap(event, peerEvent)) {
						return false;
					}
				}
			}
		}

		return true;
	}


	// Given an event input from the API, produces an array of event objects. Possible event inputs:
	// 'businessHours'
	// An event ID (number or string)
	// An object with specific start/end dates or a recurring event (like what businessHours accepts)
	function constraintToEvents(constraintInput) {

		if (constraintInput === 'businessHours') {
			return getBusinessHoursEvents();
		}

		if (typeof constraintInput === 'object') {
			return expandEvent(buildEventFromInput(constraintInput));
		}

		return clientEvents(constraintInput); // probably an ID
	}


	// Does the event's date range fully contain the given range?
	// start/end already assumed to have stripped zones :(
	function eventContainsRange(event, range) {
		var eventStart = event.start.clone().stripZone();
		var eventEnd = t.getEventEnd(event).stripZone();

		return range.start >= eventStart && range.end <= eventEnd;
	}


	// Does the event's date range intersect with the given range?
	// start/end already assumed to have stripped zones :(
	function eventIntersectsRange(event, range) {
		var eventStart = event.start.clone().stripZone();
		var eventEnd = t.getEventEnd(event).stripZone();

		return range.start < eventEnd && range.end > eventStart;
	}


	t.getEventCache = function() {
		return cache;
	};

}


// Returns a list of events that the given event should be compared against when being considered for a move to
// the specified span. Attached to the Calendar's prototype because EventManager is a mixin for a Calendar.
Calendar.prototype.getPeerEvents = function(span, event) {
	var cache = this.getEventCache();
	var peerEvents = [];
	var i, otherEvent;

	for (i = 0; i < cache.length; i++) {
		otherEvent = cache[i];
		if (
			!event ||
			event._id !== otherEvent._id // don't compare the event to itself or other related [repeating] events
		) {
			peerEvents.push(otherEvent);
		}
	}

	return peerEvents;
};


// updates the "backup" properties, which are preserved in order to compute diffs later on.
function backupEventDates(event) {
	event._allDay = event.allDay;
	event._start = event.start.clone();
	event._end = event.end ? event.end.clone() : null;
}

;;

/* An abstract class for the "basic" views, as well as month view. Renders one or more rows of day cells.
----------------------------------------------------------------------------------------------------------------------*/
// It is a manager for a DayGrid subcomponent, which does most of the heavy lifting.
// It is responsible for managing width/height.

var BasicView = FC.BasicView = View.extend({

	dayGridClass: DayGrid, // class the dayGrid will be instantiated from (overridable by subclasses)
	dayGrid: null, // the main subcomponent that does most of the heavy lifting

	dayNumbersVisible: false, // display day numbers on each day cell?
	weekNumbersVisible: false, // display week numbers along the side?

	weekNumberWidth: null, // width of all the week-number cells running down the side

	headContainerEl: null, // div that hold's the dayGrid's rendered date header
	headRowEl: null, // the fake row element of the day-of-week header


	initialize: function() {
		this.dayGrid = this.instantiateDayGrid();
	},


	// Generates the DayGrid object this view needs. Draws from this.dayGridClass
	instantiateDayGrid: function() {
		// generate a subclass on the fly with BasicView-specific behavior
		// TODO: cache this subclass
		var subclass = this.dayGridClass.extend(basicDayGridMethods);

		return new subclass(this);
	},


	// Sets the display range and computes all necessary dates
	setRange: function(range) {
		View.prototype.setRange.call(this, range); // call the super-method

		this.dayGrid.breakOnWeeks = /year|month|week/.test(this.intervalUnit); // do before setRange
		this.dayGrid.setRange(range);
	},


	// Compute the value to feed into setRange. Overrides superclass.
	computeRange: function(date) {
		var range = View.prototype.computeRange.call(this, date); // get value from the super-method

		// year and month views should be aligned with weeks. this is already done for week
		if (/year|month/.test(range.intervalUnit)) {
			range.start.startOf('week');
			range.start = this.skipHiddenDays(range.start);

			// make end-of-week if not already
			if (range.end.weekday()) {
				range.end.add(1, 'week').startOf('week');
				range.end = this.skipHiddenDays(range.end, -1, true); // exclusively move backwards
			}
		}

		return range;
	},


	// Renders the view into `this.el`, which should already be assigned
	renderDates: function() {

		this.dayNumbersVisible = this.dayGrid.rowCnt > 1; // TODO: make grid responsible
		this.weekNumbersVisible = this.opt('weekNumbers');
		this.dayGrid.numbersVisible = this.dayNumbersVisible || this.weekNumbersVisible;

		this.el.addClass('fc-basic-view').html(this.renderSkeletonHtml());
		this.renderHead();

		this.scrollerEl = this.el.find('.fc-day-grid-container');

		this.dayGrid.setElement(this.el.find('.fc-day-grid'));
		this.dayGrid.renderDates(this.hasRigidRows());
	},


	// render the day-of-week headers
	renderHead: function() {
		this.headContainerEl =
			this.el.find('.fc-head-container')
				.html(this.dayGrid.renderHeadHtml());
		this.headRowEl = this.headContainerEl.find('.fc-row');
	},


	// Unrenders the content of the view. Since we haven't separated skeleton rendering from date rendering,
	// always completely kill the dayGrid's rendering.
	unrenderDates: function() {
		this.dayGrid.unrenderDates();
		this.dayGrid.removeElement();
	},


	renderBusinessHours: function() {
		this.dayGrid.renderBusinessHours();
	},


	// Builds the HTML skeleton for the view.
	// The day-grid component will render inside of a container defined by this HTML.
	renderSkeletonHtml: function() {
		return '' +
			'<table>' +
				'<thead class="fc-head">' +
					'<tr>' +
						'<td class="fc-head-container ' + this.widgetHeaderClass + '"></td>' +
					'</tr>' +
				'</thead>' +
				'<tbody class="fc-body">' +
					'<tr>' +
						'<td class="' + this.widgetContentClass + '">' +
							'<div class="fc-day-grid-container">' +
								'<div class="fc-day-grid"/>' +
							'</div>' +
						'</td>' +
					'</tr>' +
				'</tbody>' +
			'</table>';
	},


	// Generates an HTML attribute string for setting the width of the week number column, if it is known
	weekNumberStyleAttr: function() {
		if (this.weekNumberWidth !== null) {
			return 'style="width:' + this.weekNumberWidth + 'px"';
		}
		return '';
	},


	// Determines whether each row should have a constant height
	hasRigidRows: function() {
		var eventLimit = this.opt('eventLimit');
		return eventLimit && typeof eventLimit !== 'number';
	},


	/* Dimensions
	------------------------------------------------------------------------------------------------------------------*/


	// Refreshes the horizontal dimensions of the view
	updateWidth: function() {
		if (this.weekNumbersVisible) {
			// Make sure all week number cells running down the side have the same width.
			// Record the width for cells created later.
			this.weekNumberWidth = matchCellWidths(
				this.el.find('.fc-week-number')
			);
		}
	},


	// Adjusts the vertical dimensions of the view to the specified values
	setHeight: function(totalHeight, isAuto) {
		var eventLimit = this.opt('eventLimit');
		var scrollerHeight;

		// reset all heights to be natural
		unsetScroller(this.scrollerEl);
		uncompensateScroll(this.headRowEl);

		this.dayGrid.removeSegPopover(); // kill the "more" popover if displayed

		// is the event limit a constant level number?
		if (eventLimit && typeof eventLimit === 'number') {
			this.dayGrid.limitRows(eventLimit); // limit the levels first so the height can redistribute after
		}

		scrollerHeight = this.computeScrollerHeight(totalHeight);
		this.setGridHeight(scrollerHeight, isAuto);

		// is the event limit dynamically calculated?
		if (eventLimit && typeof eventLimit !== 'number') {
			this.dayGrid.limitRows(eventLimit); // limit the levels after the grid's row heights have been set
		}

		if (!isAuto && setPotentialScroller(this.scrollerEl, scrollerHeight)) { // using scrollbars?

			compensateScroll(this.headRowEl, getScrollbarWidths(this.scrollerEl));

			// doing the scrollbar compensation might have created text overflow which created more height. redo
			scrollerHeight = this.computeScrollerHeight(totalHeight);
			this.scrollerEl.height(scrollerHeight);
		}
	},


	// Sets the height of just the DayGrid component in this view
	setGridHeight: function(height, isAuto) {
		if (isAuto) {
			undistributeHeight(this.dayGrid.rowEls); // let the rows be their natural height with no expanding
		}
		else {
			distributeHeight(this.dayGrid.rowEls, height, true); // true = compensate for height-hogging rows
		}
	},


	/* Hit Areas
	------------------------------------------------------------------------------------------------------------------*/
	// forward all hit-related method calls to dayGrid


	prepareHits: function() {
		this.dayGrid.prepareHits();
	},


	releaseHits: function() {
		this.dayGrid.releaseHits();
	},


	queryHit: function(left, top) {
		return this.dayGrid.queryHit(left, top);
	},


	getHitSpan: function(hit) {
		return this.dayGrid.getHitSpan(hit);
	},


	getHitEl: function(hit) {
		return this.dayGrid.getHitEl(hit);
	},


	/* Events
	------------------------------------------------------------------------------------------------------------------*/


	// Renders the given events onto the view and populates the segments array
	renderEvents: function(events) {
		this.dayGrid.renderEvents(events);

		this.updateHeight(); // must compensate for events that overflow the row
	},


	// Retrieves all segment objects that are rendered in the view
	getEventSegs: function() {
		return this.dayGrid.getEventSegs();
	},


	// Unrenders all event elements and clears internal segment data
	unrenderEvents: function() {
		this.dayGrid.unrenderEvents();

		// we DON'T need to call updateHeight() because:
		// A) a renderEvents() call always happens after this, which will eventually call updateHeight()
		// B) in IE8, this causes a flash whenever events are rerendered
	},


	/* Dragging (for both events and external elements)
	------------------------------------------------------------------------------------------------------------------*/


	// A returned value of `true` signals that a mock "helper" event has been rendered.
	renderDrag: function(dropLocation, seg) {
		return this.dayGrid.renderDrag(dropLocation, seg);
	},


	unrenderDrag: function() {
		this.dayGrid.unrenderDrag();
	},


	/* Selection
	------------------------------------------------------------------------------------------------------------------*/


	// Renders a visual indication of a selection
	renderSelection: function(span) {
		this.dayGrid.renderSelection(span);
	},


	// Unrenders a visual indications of a selection
	unrenderSelection: function() {
		this.dayGrid.unrenderSelection();
	}

});


// Methods that will customize the rendering behavior of the BasicView's dayGrid
var basicDayGridMethods = {


	// Generates the HTML that will go before the day-of week header cells
	renderHeadIntroHtml: function() {
		var view = this.view;

		if (view.weekNumbersVisible) {
			return '' +
				'<th class="fc-week-number ' + view.widgetHeaderClass + '" ' + view.weekNumberStyleAttr() + '>' +
					'<span>' + // needed for matchCellWidths
						htmlEscape(view.opt('weekNumberTitle')) +
					'</span>' +
				'</th>';
		}

		return '';
	},


	// Generates the HTML that will go before content-skeleton cells that display the day/week numbers
	renderNumberIntroHtml: function(row) {
		var view = this.view;

		if (view.weekNumbersVisible) {
			return '' +
				'<td class="fc-week-number" ' + view.weekNumberStyleAttr() + '>' +
					'<span>' + // needed for matchCellWidths
						this.getCellDate(row, 0).format('w') +
					'</span>' +
				'</td>';
		}

		return '';
	},


	// Generates the HTML that goes before the day bg cells for each day-row
	renderBgIntroHtml: function() {
		var view = this.view;

		if (view.weekNumbersVisible) {
			return '<td class="fc-week-number ' + view.widgetContentClass + '" ' +
				view.weekNumberStyleAttr() + '></td>';
		}

		return '';
	},


	// Generates the HTML that goes before every other type of row generated by DayGrid.
	// Affects helper-skeleton and highlight-skeleton rows.
	renderIntroHtml: function() {
		var view = this.view;

		if (view.weekNumbersVisible) {
			return '<td class="fc-week-number" ' + view.weekNumberStyleAttr() + '></td>';
		}

		return '';
	}

};

;;

/* A month view with day cells running in rows (one-per-week) and columns
----------------------------------------------------------------------------------------------------------------------*/

var MonthView = FC.MonthView = BasicView.extend({

	// Produces information about what range to display
	computeRange: function(date) {
		var range = BasicView.prototype.computeRange.call(this, date); // get value from super-method
		var rowCnt;

		// ensure 6 weeks
		if (this.isFixedWeeks()) {
			rowCnt = Math.ceil(range.end.diff(range.start, 'weeks', true)); // could be partial weeks due to hiddenDays
			range.end.add(6 - rowCnt, 'weeks');
		}

		return range;
	},


	// Overrides the default BasicView behavior to have special multi-week auto-height logic
	setGridHeight: function(height, isAuto) {

		isAuto = isAuto || this.opt('weekMode') === 'variable'; // LEGACY: weekMode is deprecated

		// if auto, make the height of each row the height that it would be if there were 6 weeks
		if (isAuto) {
			height *= this.rowCnt / 6;
		}

		distributeHeight(this.dayGrid.rowEls, height, !isAuto); // if auto, don't compensate for height-hogging rows
	},


	isFixedWeeks: function() {
		var weekMode = this.opt('weekMode'); // LEGACY: weekMode is deprecated
		if (weekMode) {
			return weekMode === 'fixed'; // if any other type of weekMode, assume NOT fixed
		}

		return this.opt('fixedWeekCount');
	}

});

;;

fcViews.basic = {
	'class': BasicView
};

fcViews.basicDay = {
	type: 'basic',
	duration: { days: 1 }
};

fcViews.basicWeek = {
	type: 'basic',
	duration: { weeks: 1 }
};

fcViews.month = {
	'class': MonthView,
	duration: { months: 1 }, // important for prev/next
	defaults: {
		fixedWeekCount: true
	}
};
;;

/* An abstract class for all agenda-related views. Displays one more columns with time slots running vertically.
----------------------------------------------------------------------------------------------------------------------*/
// Is a manager for the TimeGrid subcomponent and possibly the DayGrid subcomponent (if allDaySlot is on).
// Responsible for managing width/height.

var AgendaView = FC.AgendaView = View.extend({

	timeGridClass: TimeGrid, // class used to instantiate the timeGrid. subclasses can override
	timeGrid: null, // the main time-grid subcomponent of this view

	dayGridClass: DayGrid, // class used to instantiate the dayGrid. subclasses can override
	dayGrid: null, // the "all-day" subcomponent. if all-day is turned off, this will be null

	axisWidth: null, // the width of the time axis running down the side

	headContainerEl: null, // div that hold's the timeGrid's rendered date header
	noScrollRowEls: null, // set of fake row elements that must compensate when scrollerEl has scrollbars

	// when the time-grid isn't tall enough to occupy the given height, we render an <hr> underneath
	bottomRuleEl: null,
	bottomRuleHeight: null,


	initialize: function() {
		this.timeGrid = this.instantiateTimeGrid();

		if (this.opt('allDaySlot')) { // should we display the "all-day" area?
			this.dayGrid = this.instantiateDayGrid(); // the all-day subcomponent of this view
		}
	},


	// Instantiates the TimeGrid object this view needs. Draws from this.timeGridClass
	instantiateTimeGrid: function() {
		var subclass = this.timeGridClass.extend(agendaTimeGridMethods);

		return new subclass(this);
	},


	// Instantiates the DayGrid object this view might need. Draws from this.dayGridClass
	instantiateDayGrid: function() {
		var subclass = this.dayGridClass.extend(agendaDayGridMethods);

		return new subclass(this);
	},


	/* Rendering
	------------------------------------------------------------------------------------------------------------------*/


	// Sets the display range and computes all necessary dates
	setRange: function(range) {
		View.prototype.setRange.call(this, range); // call the super-method

		this.timeGrid.setRange(range);
		if (this.dayGrid) {
			this.dayGrid.setRange(range);
		}
	},


	// Renders the view into `this.el`, which has already been assigned
	renderDates: function() {

		this.el.addClass('fc-agenda-view').html(this.renderSkeletonHtml());
		this.renderHead();

		// the element that wraps the time-grid that will probably scroll
		this.scrollerEl = this.el.find('.fc-time-grid-container');

		this.timeGrid.setElement(this.el.find('.fc-time-grid'));
		this.timeGrid.renderDates();

		// the <hr> that sometimes displays under the time-grid
		this.bottomRuleEl = $('<hr class="fc-divider ' + this.widgetHeaderClass + '"/>')
			.appendTo(this.timeGrid.el); // inject it into the time-grid

		if (this.dayGrid) {
			this.dayGrid.setElement(this.el.find('.fc-day-grid'));
			this.dayGrid.renderDates();

			// have the day-grid extend it's coordinate area over the <hr> dividing the two grids
			this.dayGrid.bottomCoordPadding = this.dayGrid.el.next('hr').outerHeight();
		}

		this.noScrollRowEls = this.el.find('.fc-row:not(.fc-scroller *)'); // fake rows not within the scroller
	},


	// render the day-of-week headers
	renderHead: function() {
		this.headContainerEl =
			this.el.find('.fc-head-container')
				.html(this.timeGrid.renderHeadHtml());
	},


	// Unrenders the content of the view. Since we haven't separated skeleton rendering from date rendering,
	// always completely kill each grid's rendering.
	unrenderDates: function() {
		this.timeGrid.unrenderDates();
		this.timeGrid.removeElement();

		if (this.dayGrid) {
			this.dayGrid.unrenderDates();
			this.dayGrid.removeElement();
		}
	},


	// Builds the HTML skeleton for the view.
	// The day-grid and time-grid components will render inside containers defined by this HTML.
	renderSkeletonHtml: function() {
		return '' +
			'<table>' +
				'<thead class="fc-head">' +
					'<tr>' +
						'<td class="fc-head-container ' + this.widgetHeaderClass + '"></td>' +
					'</tr>' +
				'</thead>' +
				'<tbody class="fc-body">' +
					'<tr>' +
						'<td class="' + this.widgetContentClass + '">' +
							(this.dayGrid ?
								'<div class="fc-day-grid"/>' +
								'<hr class="fc-divider ' + this.widgetHeaderClass + '"/>' :
								''
								) +
							'<div class="fc-time-grid-container">' +
								'<div class="fc-time-grid"/>' +
							'</div>' +
						'</td>' +
					'</tr>' +
				'</tbody>' +
			'</table>';
	},


	// Generates an HTML attribute string for setting the width of the axis, if it is known
	axisStyleAttr: function() {
		if (this.axisWidth !== null) {
			 return 'style="width:' + this.axisWidth + 'px"';
		}
		return '';
	},


	/* Business Hours
	------------------------------------------------------------------------------------------------------------------*/


	renderBusinessHours: function() {
		this.timeGrid.renderBusinessHours();

		if (this.dayGrid) {
			this.dayGrid.renderBusinessHours();
		}
	},


	unrenderBusinessHours: function() {
		this.timeGrid.unrenderBusinessHours();

		if (this.dayGrid) {
			this.dayGrid.unrenderBusinessHours();
		}
	},


	/* Now Indicator
	------------------------------------------------------------------------------------------------------------------*/


	getNowIndicatorUnit: function() {
		return this.timeGrid.getNowIndicatorUnit();
	},


	renderNowIndicator: function(date) {
		this.timeGrid.renderNowIndicator(date);
	},


	unrenderNowIndicator: function() {
		this.timeGrid.unrenderNowIndicator();
	},


	/* Dimensions
	------------------------------------------------------------------------------------------------------------------*/


	updateSize: function(isResize) {
		this.timeGrid.updateSize(isResize);

		View.prototype.updateSize.call(this, isResize); // call the super-method
	},


	// Refreshes the horizontal dimensions of the view
	updateWidth: function() {
		// make all axis cells line up, and record the width so newly created axis cells will have it
		this.axisWidth = matchCellWidths(this.el.find('.fc-axis'));
	},


	// Adjusts the vertical dimensions of the view to the specified values
	setHeight: function(totalHeight, isAuto) {
		var eventLimit;
		var scrollerHeight;

		if (this.bottomRuleHeight === null) {
			// calculate the height of the rule the very first time
			this.bottomRuleHeight = this.bottomRuleEl.outerHeight();
		}
		this.bottomRuleEl.hide(); // .show() will be called later if this <hr> is necessary

		// reset all dimensions back to the original state
		this.scrollerEl.css('overflow', '');
		unsetScroller(this.scrollerEl);
		uncompensateScroll(this.noScrollRowEls);

		// limit number of events in the all-day area
		if (this.dayGrid) {
			this.dayGrid.removeSegPopover(); // kill the "more" popover if displayed

			eventLimit = this.opt('eventLimit');
			if (eventLimit && typeof eventLimit !== 'number') {
				eventLimit = AGENDA_ALL_DAY_EVENT_LIMIT; // make sure "auto" goes to a real number
			}
			if (eventLimit) {
				this.dayGrid.limitRows(eventLimit);
			}
		}

		if (!isAuto) { // should we force dimensions of the scroll container, or let the contents be natural height?

			scrollerHeight = this.computeScrollerHeight(totalHeight);
			if (setPotentialScroller(this.scrollerEl, scrollerHeight)) { // using scrollbars?

				// make the all-day and header rows lines up
				compensateScroll(this.noScrollRowEls, getScrollbarWidths(this.scrollerEl));

				// the scrollbar compensation might have changed text flow, which might affect height, so recalculate
				// and reapply the desired height to the scroller.
				scrollerHeight = this.computeScrollerHeight(totalHeight);
				this.scrollerEl.height(scrollerHeight);
			}
			else { // no scrollbars
				// still, force a height and display the bottom rule (marks the end of day)
				this.scrollerEl.height(scrollerHeight).css('overflow', 'hidden'); // in case <hr> goes outside
				this.bottomRuleEl.show();
			}
		}
	},


	// Computes the initial pre-configured scroll state prior to allowing the user to change it
	computeInitialScroll: function() {
		var scrollTime = moment.duration(this.opt('scrollTime'));
		var top = this.timeGrid.computeTimeTop(scrollTime);

		// zoom can give weird floating-point values. rather scroll a little bit further
		top = Math.ceil(top);

		if (top) {
			top++; // to overcome top border that slots beyond the first have. looks better
		}

		return top;
	},


	/* Hit Areas
	------------------------------------------------------------------------------------------------------------------*/
	// forward all hit-related method calls to the grids (dayGrid might not be defined)


	prepareHits: function() {
		this.timeGrid.prepareHits();
		if (this.dayGrid) {
			this.dayGrid.prepareHits();
		}
	},


	releaseHits: function() {
		this.timeGrid.releaseHits();
		if (this.dayGrid) {
			this.dayGrid.releaseHits();
		}
	},


	queryHit: function(left, top) {
		var hit = this.timeGrid.queryHit(left, top);

		if (!hit && this.dayGrid) {
			hit = this.dayGrid.queryHit(left, top);
		}

		return hit;
	},


	getHitSpan: function(hit) {
		// TODO: hit.component is set as a hack to identify where the hit came from
		return hit.component.getHitSpan(hit);
	},


	getHitEl: function(hit) {
		// TODO: hit.component is set as a hack to identify where the hit came from
		return hit.component.getHitEl(hit);
	},


	/* Events
	------------------------------------------------------------------------------------------------------------------*/


	// Renders events onto the view and populates the View's segment array
	renderEvents: function(events) {
		var dayEvents = [];
		var timedEvents = [];
		var daySegs = [];
		var timedSegs;
		var i;

		// separate the events into all-day and timed
		for (i = 0; i < events.length; i++) {
			if (events[i].allDay) {
				dayEvents.push(events[i]);
			}
			else {
				timedEvents.push(events[i]);
			}
		}

		// render the events in the subcomponents
		timedSegs = this.timeGrid.renderEvents(timedEvents);
		if (this.dayGrid) {
			daySegs = this.dayGrid.renderEvents(dayEvents);
		}

		// the all-day area is flexible and might have a lot of events, so shift the height
		this.updateHeight();
	},


	// Retrieves all segment objects that are rendered in the view
	getEventSegs: function() {
		return this.timeGrid.getEventSegs().concat(
			this.dayGrid ? this.dayGrid.getEventSegs() : []
		);
	},


	// Unrenders all event elements and clears internal segment data
	unrenderEvents: function() {

		// unrender the events in the subcomponents
		this.timeGrid.unrenderEvents();
		if (this.dayGrid) {
			this.dayGrid.unrenderEvents();
		}

		// we DON'T need to call updateHeight() because:
		// A) a renderEvents() call always happens after this, which will eventually call updateHeight()
		// B) in IE8, this causes a flash whenever events are rerendered
	},


	/* Dragging (for events and external elements)
	------------------------------------------------------------------------------------------------------------------*/


	// A returned value of `true` signals that a mock "helper" event has been rendered.
	renderDrag: function(dropLocation, seg) {
		if (dropLocation.start.hasTime()) {
			return this.timeGrid.renderDrag(dropLocation, seg);
		}
		else if (this.dayGrid) {
			return this.dayGrid.renderDrag(dropLocation, seg);
		}
	},


	unrenderDrag: function() {
		this.timeGrid.unrenderDrag();
		if (this.dayGrid) {
			this.dayGrid.unrenderDrag();
		}
	},


	/* Selection
	------------------------------------------------------------------------------------------------------------------*/


	// Renders a visual indication of a selection
	renderSelection: function(span) {
		if (span.start.hasTime() || span.end.hasTime()) {
			this.timeGrid.renderSelection(span);
		}
		else if (this.dayGrid) {
			this.dayGrid.renderSelection(span);
		}
	},


	// Unrenders a visual indications of a selection
	unrenderSelection: function() {
		this.timeGrid.unrenderSelection();
		if (this.dayGrid) {
			this.dayGrid.unrenderSelection();
		}
	}

});


// Methods that will customize the rendering behavior of the AgendaView's timeGrid
// TODO: move into TimeGrid
var agendaTimeGridMethods = {


	// Generates the HTML that will go before the day-of week header cells
	renderHeadIntroHtml: function() {
		var view = this.view;
		var weekText;

		if (view.opt('weekNumbers')) {
			weekText = this.start.format(view.opt('smallWeekFormat'));

			return '' +
				'<th class="fc-axis fc-week-number ' + view.widgetHeaderClass + '" ' + view.axisStyleAttr() + '>' +
					'<span>' + // needed for matchCellWidths
						htmlEscape(weekText) +
					'</span>' +
				'</th>';
		}
		else {
			return '<th class="fc-axis ' + view.widgetHeaderClass + '" ' + view.axisStyleAttr() + '></th>';
		}
	},


	// Generates the HTML that goes before the bg of the TimeGrid slot area. Long vertical column.
	renderBgIntroHtml: function() {
		var view = this.view;

		return '<td class="fc-axis ' + view.widgetContentClass + '" ' + view.axisStyleAttr() + '></td>';
	},


	// Generates the HTML that goes before all other types of cells.
	// Affects content-skeleton, helper-skeleton, highlight-skeleton for both the time-grid and day-grid.
	renderIntroHtml: function() {
		var view = this.view;

		return '<td class="fc-axis" ' + view.axisStyleAttr() + '></td>';
	}

};


// Methods that will customize the rendering behavior of the AgendaView's dayGrid
var agendaDayGridMethods = {


	// Generates the HTML that goes before the all-day cells
	renderBgIntroHtml: function() {
		var view = this.view;

		return '' +
			'<td class="fc-axis ' + view.widgetContentClass + '" ' + view.axisStyleAttr() + '>' +
				'<span>' + // needed for matchCellWidths
					(view.opt('allDayHtml') || htmlEscape(view.opt('allDayText'))) +
				'</span>' +
			'</td>';
	},


	// Generates the HTML that goes before all other types of cells.
	// Affects content-skeleton, helper-skeleton, highlight-skeleton for both the time-grid and day-grid.
	renderIntroHtml: function() {
		var view = this.view;

		return '<td class="fc-axis" ' + view.axisStyleAttr() + '></td>';
	}

};

;;

var AGENDA_ALL_DAY_EVENT_LIMIT = 5;

// potential nice values for the slot-duration and interval-duration
// from largest to smallest
var AGENDA_STOCK_SUB_DURATIONS = [
	{ hours: 1 },
	{ minutes: 30 },
	{ minutes: 15 },
	{ seconds: 30 },
	{ seconds: 15 }
];

fcViews.agenda = {
	'class': AgendaView,
	defaults: {
		allDaySlot: true,
		allDayText: 'all-day',
		slotDuration: '00:30:00',
		minTime: '00:00:00',
		maxTime: '24:00:00',
		slotEventOverlap: true // a bad name. confused with overlap/constraint system
	}
};

fcViews.agendaDay = {
	type: 'agenda',
	duration: { days: 1 }
};

fcViews.agendaWeek = {
	type: 'agenda',
	duration: { weeks: 1 }
};
;;

return FC; // export for Node/CommonJS
});
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 * Bootstrap v3.3.7 (http://getbootstrap.com)
 * Copyright 2011-2016 Twitter, Inc.
 * Licensed under the MIT license
 */
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/*!
 * Bootstrap-select v1.12.2 (http://silviomoreto.github.io/bootstrap-select)
 *
 * Copyright 2013-2017 bootstrap-select
 * Licensed under MIT (https://github.com/silviomoreto/bootstrap-select/blob/master/LICENSE)
 */
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f={"&":"&amp;","<":"&lt;",">":"&gt;",'"':"&quot;","'":"&#x27;","`":"&#x60;"},g={"&amp;":"&","&lt;":"<","&gt;":">","&quot;":'"',"&#x27;":"'","&#x60;":"`"},h=function(a){var b=function(b){return a[b]},c="(?:"+Object.keys(a).join("|")+")",d=RegExp(c),e=RegExp(c,"g");return function(a){return a=null==a?"":""+a,d.test(a)?a.replace(e,b):a}},i=h(f),j=h(g),k=function(b,c){d.useDefault||(a.valHooks.select.set=d._set,d.useDefault=!0),this.$element=a(b),this.$newElement=null,this.$button=null,this.$menu=null,this.$lis=null,this.options=c,null===this.options.title&&(this.options.title=this.$element.attr("title"));var e=this.options.windowPadding;"number"==typeof 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c=document.createElement("div"),d=document.createElement("div"),e=document.createElement("ul"),f=document.createElement("li"),g=document.createElement("li"),h=document.createElement("a"),i=document.createElement("span"),j=this.options.header&&this.$menu.find(".popover-title").length>0?this.$menu.find(".popover-title")[0].cloneNode(!0):null,k=this.options.liveSearch?document.createElement("div"):null,l=this.options.actionsBox&&this.multiple&&this.$menu.find(".bs-actionsbox").length>0?this.$menu.find(".bs-actionsbox")[0].cloneNode(!0):null,m=this.options.doneButton&&this.multiple&&this.$menu.find(".bs-donebutton").length>0?this.$menu.find(".bs-donebutton")[0].cloneNode(!0):null;if(i.className="text",c.className=this.$menu[0].parentNode.className+" open",d.className="dropdown-menu open",e.className="dropdown-menu inner",f.className="divider",i.appendChild(document.createTextNode("Inner text")),h.appendChild(i),g.appendChild(h),e.appendChild(g),e.appendChild(f),j&&d.appendChild(j),k){var 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/**************************************
 * Don't change anything from here on
 * if you don't know what you're doing.
 * Otherwise the earth might disappear
 * in a large black hole. We'll blame you!
 **************************************/

var siteConfiguration = {
    searchPid: 749
};

/*******************************************************************************
 * FIXES
 */
/* Internet Explorer 10 auf Windows 8 und Windows Phone 8 */
if (navigator.userAgent.match(/IEMobile\/10\.0/)) {
    var msViewportStyle = document.createElement('style')
    msViewportStyle.appendChild(
        document.createTextNode(
            '@-ms-viewport{width:auto!important}'
        )
    )
    document.querySelector('head').appendChild(msViewportStyle)
}
/* Android Stock Browser - Der Android Stock Browser wird bei <select>-Elementen die Symbole an der Seite ansonsten nicht richtig anzeigen, wenn ein border-radius und/oder border vorhanden ist. */
var nua = navigator.userAgent;
var isAndroid = (nua.indexOf('Mozilla/5.0') > -1 && nua.indexOf('Android ') > -1 && nua.indexOf('AppleWebKit') > -1 && nua.indexOf('Chrome') === -1);
if (isAndroid) {
    $('select.form-control').removeClass('form-control').css('width', '100%');
}

// ----------------------------------------------------------
// A short snippet for detecting versions of IE in JavaScript
// without resorting to user-agent sniffing
// ----------------------------------------------------------
// If you're not in IE (or IE version is less than 5) then:
// ie === false
// If you're in IE (>=5) then you can determine which version:
// ie === 7; // IE7
// Thus, to detect IE:
// if (ie) {}
// And to detect the version:
// ie === 6 // IE6
// ie > 7 // IE8, IE9 ...
// ie < 9 // Anything less than IE9
// ----------------------------------------------------------

// UPDATE: Now using Live NodeList idea from @jdalton

// @see https://gist.github.com/padolsey/527683

var MSIE = (function () {
    var v = 3, div = document.createElement('div'), a = div.all || [];
    while (div.innerHTML = '<!--[if gt IE ' + (++v) + ']><br><![endif]-->', a[0]);
    return v > 4 ? v : !v;
}());

/**
 * Empty sidebar fix
 */
jQuery(window).resize(function () {
    jQuery(".sidebar").each(function () {
        var self = jQuery(this);

        self.show();

        var children = self.find(":visible:not(.border)");

        if (children.length == 0) {
            self.hide();
        }
    });
}).resize();

/*******************************************************************************
 * ON DOCUMENT READY
 */
jQuery(document).ready(function () {

    /**
     * Lightbox
     */
    jQuery('.csc-textpic-image')
        .find('.lightbox')
        .magnificPopup({
            type: 'image',
            gallery: {
                enabled: true
            }
        });

    jQuery(".tx-ew-roedermark .time").each(function() {
        var self = jQuery(this);
        var content = self.html();
        var from = 'en';
        var to = 'de';
        var days = [
            { en: 'Monday', de: 'Montag' },
            { en: 'Tuesday', de: 'Dienstag' },
            { en: 'Wednesday', de: 'Mittwoch' },
            { en: 'Thursday', de: 'Donnerstag' },
            { en: 'Friday', de: 'Freitag' },
            { en: 'Saturday', de: 'Samstag' },
            { en: 'Sunday', de: 'Sonntag' }
        ];

        for (var i = 0; i < days.length; i++) {
            if (content.includes(days[i][from])) {
                self.html(content.replace(new RegExp(days[i][from], 'g'), days[i][to]));
            }
        }
    });

    /**
     * last-first child helper
     */
    jQuery(".csc-default:first-child").addClass('first');
    jQuery(".csc-default:last-child").addClass('last');

    /**
     * BOOTSTRAP SELECT
     * @see http://silviomoreto.github.io/bootstrap-select/
     */
    if (!MSIE || MSIE > 8) {
        jQuery("select").addClass('show-menu-arrow');
        jQuery("select").selectpicker();
    }

    /**
     * SEARCH TOGGLE
     */
    if (typeof siteConfiguration != 'undefined' && typeof siteConfiguration.searchPid != 'undefined') {
        var SearchContainer = jQuery("#main-nav .navbar-header");
        if (SearchContainer.length) {
            jQuery(".pid-" + siteConfiguration.searchPid + " a")
                .attr('data-toggle', 'collapse')
                .attr('data-target', SearchContainer.selector)
                .click(function (e) {
                    e.preventDefault();
                });

            SearchContainer.on('shown.bs.collapse', function () {
                jQuery(this).find(".sword").focus();
            });
        }
    }

    /**
     * TEASER CAROUSEL
     * @see http://getbootstrap.com/javascript/#carousel
     */
    var teaserInterval = 4000;
    jQuery(".site-teaser").each(function () {
        var teaserSelector = jQuery(this);
        var count = teaserSelector.find('.item').length;

        if (count !== 0) {
            //carousel loader bar
            if (count >= 2) {
                teaserSelector.find(".loader .bar").stop().css('width', '0%').animate({
                    width: '100%'
                }, teaserInterval);
                teaserSelector.on('slide.bs.carousel', function (e) {
                    teaserSelector.find(".loader .bar").stop().css('width', '0%').animate({
                        width: '100%'
                    }, teaserInterval);
                });
            }
            // carousel controls
            if (count === 1) {
                teaserSelector.find(".carousel-control").hide();
            }
            if (teaserSelector.find('.item.active').length === 0) {
                teaserSelector.find(".item:first").addClass('active');
            }
            if (count > 1 && teaserSelector.find('.carousel-indicators').length === 0) {
                var indicatorsHtml = '';
                teaserSelector.find(".item").each(function (i) {
                    indicatorsHtml += '<li data-target="#' + (teaserSelector[0]['id']) + '" data-slide-to="' + i + '" class="' + ((i == 0) ? 'active' : '') + '"></li>&nbsp;';
                });
                teaserSelector.append('<ol class="carousel-indicators animated fadeIn">' + indicatorsHtml + '</ol>');
            }
        }
    }).carousel({
        interval: teaserInterval
    });

    /**
     * SWIPE FUNCTIONALITY FOR BS CAROUSEL
     */
    jQuery(".carousel").swiperight(function () {
        jQuery(this).carousel('prev');
    }).swipeleft(function () {
        jQuery(this).carousel('next');
    });

    /**
     * Search click status
     */
    var searchGroup = jQuery("#main-nav .input-group");
    if (searchGroup.length !== 0) {
        searchGroup.find(".form-control").focusin(function () {
            searchGroup.addClass('in').removeClass('out');
        });
        searchGroup.find(".form-control").focusout(function () {
            searchGroup.addClass('out').removeClass('in');
        });
    }

    /**
     * ANCHOR ANIMATION
     * back to top
     */
    jQuery(".backtotop").click(function (e) {
        e.preventDefault();
        jQuery("html, body").animate({scrollTop: 0}, 500);
    });

    /**
     * ANCHOR ANIMATION
     * slide to id by hash
     */
    jQuery("a.move").bind("click", function (e) {
        var z = jQuery(this).get(0).hash, o = jQuery(z);

        if (o.length != 0) {
            e.preventDefault();
            jQuery("html, body").animate({
                scrollTop: o.offset().top
            }, 500);
        }
    });

    /**
     * IMAGE RESPONSIVE HELPER
     */
    jQuery("img.img-responsive").removeAttr('width').removeAttr('height');

    /**
     * VERTICAL HELPER LINK HELPER
     * Removes link html whitespaces because of wrong underline by onmouseover
     */
    jQuery("a.vertical-helper").each(function () {
        jQuery(this).html(jQuery.trim(jQuery(this).html()));
    });

    /**
     * Mega Menu
     */
    var navbarMega = {
        selector: jQuery(".navbar-mega"),
        placeMaker: null,
        displace: function () {
            return (this.selector.length &&
            this.selector.hasClass('navbar-displacing') &&
            this.getPlaceMaker()) ? this.selector.find(".dropdown") : null
        },
        getPlaceMaker: function () {
            var p, self = this;

            if ((p = self.placeMaker) === null) {
                p = jQuery("div.navbar-displacing-place-maker:first:visible");
                if (!p.length) {
                    p = jQuery('<div class="navbar-displacing-place-maker"/>');
                    self.selector.after(p);
                }
            }

            return self.placeMaker = p
        },
        /**
         * Switches animation by direction
         *
         * @param obj       jQuery object
         * @param direction string The direction {in, out}
         */
        animateHeight: function (obj, direction, height) {
            var speed = 150;

            obj.stop();

            switch (direction) {
                case 'in':
                    obj.height(0).animate({
                        'height': height
                    }, speed);
                    break;
                default:
                    obj.css({
                        display: 'block',
                        visibility: 'visible'
                    });
                    obj.animate({
                        'height': height
                    }, speed, function () {
                        jQuery(this).removeAttr('style')
                    });
            }
        },
        preventClosing: function () {
            this.selector.find(".dropdown-menu").click(function (e) {
                e.stopPropagation();
            });
        }
    };

    // stop dropdown closing by some content (forms, ...)
    navbarMega.preventClosing();

    // moves content
    var navbarMegaDisplace, navbarMegaDisplaced = false;

    if ((navbarMegaDisplace = navbarMega.displace()) !== null) {
        navbarMegaDisplace.on('shown.bs.dropdown', function () {
            if (navbarMegaDisplaced)
                return;

            var dd = jQuery(this).find(".dropdown-menu"),
                ddHeight = dd.outerHeight(true);

            navbarMega.animateHeight(dd, 'in', ddHeight);
            navbarMega.animateHeight(navbarMega.getPlaceMaker(), 'in', ddHeight);
            navbarMegaDisplaced = true;
        }).on('hidden.bs.dropdown', function () {
            if (!navbarMegaDisplaced)
                return;

            var dd = jQuery(this).find(".dropdown-menu");

            navbarMega.animateHeight(dd, 'out', 0);
            navbarMega.animateHeight(navbarMega.getPlaceMaker(), 'out', 0);
            navbarMegaDisplaced = false;
        });
    }

});

/**
 * EQUALIZE LISTING HEIGHTS
 * apply your matchHeight on DOM ready (they will be automatically re-applied on load or resize)
 * @see http://brm.io/jquery-match-height/
 */
(function () {
    if (!MSIE || MSIE > 8) {
        jQuery(function () {
            var listingAutoPanels = jQuery(".equalize-panel");
            if (listingAutoPanels.length != 0) {
                listingAutoPanels.each(function () {
                    jQuery(this).find(".image-link").matchHeight();
                    jQuery(this).find(".title").matchHeight();
                    jQuery(this).find(".desc").matchHeight();
                    jQuery(this).find(".section-body").matchHeight();
                    jQuery(this).find(".section-footer").matchHeight();
                    jQuery(this).find(".section").matchHeight();
                });
            }
            var listingNoPanels = jQuery(".equalize");
            if (listingNoPanels.length != 0) {
                listingNoPanels.each(function () {
                    jQuery(this).find(".image-link").matchHeight(false);
                    jQuery(this).find(".title").matchHeight(false);
                    jQuery(this).find(".desc").matchHeight(false);
                    jQuery(this).find(".section-body").matchHeight(false);
                    jQuery(this).find(".section-footer").matchHeight(false);
                    jQuery(this).find(".section").matchHeight(false);
                });
            }

            // flexslider with grid columns
            jQuery(".flexslider .row .csc-default").matchHeight();

            // navbar mega
            var navbarMegaPanels = jQuery(".navbar-mega .row");
            if (navbarMegaPanels.length != 0) {
                navbarMegaPanels.each(function () {
                    //jQuery(this).find(".title").matchHeight();
                    jQuery(this).find(".col").matchHeight();
                });
            }
        });
    }
})();

/**
 * Resize mega toggle to fit equalized inner height!
 */
jQuery(window).bind('resize orientationchange', function () {
    setTimeout(function () {
        if (jQuery.isXs())
            return;

        var dropdown = jQuery(".full-width.open .row"),
            place = jQuery("div.navbar-displacing-place-maker:first:visible"),
            dropdownHeight;

        if (!dropdown.length || !place.length)
            return;

        dropdown.css('height', 'auto');
        dropdownHeight = dropdown.height();

        if (place.height() == 0)
            return;

        dropdown.height(dropdownHeight);
        place.height(dropdownHeight);
    }, 100);
});

/**
 * Bootstrap Carousel Touch support
 *
 *! jQuery Mobile v1.3.2 | Copyright 2010, 2013 jQuery Foundation, Inc. | jquery.org/license
 *
 */
!function (t, e, n) {
    "function" == typeof define && define.amd ? define(["jquery"], function (o) {
        return n(o, t, e), o.mobile
    }) : n(t.jQuery, t, e)
}(this, document, function (t, e, n) {
    !function (t, e, n, o) {
        function i(t) {
            for (; t && "undefined" != typeof t.originalEvent;)t = t.originalEvent;
            return t
        }

        function r(e, n) {
            var r, s, a, c, u, l, h, p, d, v = e.type;
            if (e = t.Event(e), e.type = n, r = e.originalEvent, s = t.event.props, v.search(/^(mouse|click)/) > -1 && (s = S), r)for (h = s.length, c; h;)c = s[--h], e[c] = r[c];
            if (v.search(/mouse(down|up)|click/) > -1 && !e.which && (e.which = 1), -1 !== v.search(/^touch/) && (a = i(r), v = a.touches, u = a.changedTouches, l = v && v.length ? v[0] : u && u.length ? u[0] : o, l))for (p = 0, d = M.length; d > p; p++)c = M[p], e[c] = l[c];
            return e
        }

        function s(e) {
            for (var n, o, i = {}; e;) {
                n = t.data(e, k);
                for (o in n)n[o] && (i[o] = i.hasVirtualBinding = !0);
                e = e.parentNode
            }
            return i
        }

        function a(e, n) {
            for (var o; e;) {
                if (o = t.data(e, k), o && (!n || o[n]))return e;
                e = e.parentNode
            }
            return null
        }

        function c() {
            H = !1
        }

        function u() {
            H = !0
        }

        function l() {
            Q = 0, z.length = 0, F = !1, u()
        }

        function h() {
            c()
        }

        function p() {
            d(), x = setTimeout(function () {
                x = 0, l()
            }, t.vmouse.resetTimerDuration)
        }

        function d() {
            x && (clearTimeout(x), x = 0)
        }

        function v(e, n, o) {
            var i;
            return (o && o[e] || !o && a(n.target, e)) && (i = r(n, e), t(n.target).trigger(i)), i
        }

        function f(e) {
            var n = t.data(e.target, X);
            if (!(F || Q && Q === n)) {
                var o = v("v" + e.type, e);
                o && (o.isDefaultPrevented() && e.preventDefault(), o.isPropagationStopped() && e.stopPropagation(), o.isImmediatePropagationStopped() && e.stopImmediatePropagation())
            }
        }

        function m(e) {
            var n, o, r = i(e).touches;
            if (r && 1 === r.length && (n = e.target, o = s(n), o.hasVirtualBinding)) {
                Q = q++, t.data(n, X, Q), d(), h(), j = !1;
                var a = i(e).touches[0];
                B = a.pageX, N = a.pageY, v("vmouseover", e, o), v("vmousedown", e, o)
            }
        }

        function g(t) {
            H || (j || v("vmousecancel", t, s(t.target)), j = !0, p())
        }

        function b(e) {
            if (!H) {
                var n = i(e).touches[0], o = j, r = t.vmouse.moveDistanceThreshold, a = s(e.target);
                j = j || Math.abs(n.pageX - B) > r || Math.abs(n.pageY - N) > r, j && !o && v("vmousecancel", e, a), v("vmousemove", e, a), p()
            }
        }

        function w(t) {
            if (!H) {
                u();
                var e, n = s(t.target);
                if (v("vmouseup", t, n), !j) {
                    var o = v("vclick", t, n);
                    o && o.isDefaultPrevented() && (e = i(t).changedTouches[0], z.push({
                        touchID: Q,
                        x: e.clientX,
                        y: e.clientY
                    }), F = !0)
                }
                v("vmouseout", t, n), j = !1, p()
            }
        }

        function T(e) {
            var n, o = t.data(e, k);
            if (o)for (n in o)if (o[n])return !0;
            return !1
        }

        function D() {
        }

        function y(e) {
            var n = e.substr(1);
            return {
                setup: function () {
                    T(this) || t.data(this, k, {});
                    var o = t.data(this, k);
                    o[e] = !0, I[e] = (I[e] || 0) + 1, 1 === I[e] && V.bind(n, f), t(this).bind(n, D), L && (I.touchstart = (I.touchstart || 0) + 1, 1 === I.touchstart && V.bind("touchstart", m).bind("touchend", w).bind("touchmove", b).bind("scroll", g))
                }, teardown: function () {
                    --I[e], I[e] || V.unbind(n, f), L && (--I.touchstart, I.touchstart || V.unbind("touchstart", m).unbind("touchmove", b).unbind("touchend", w).unbind("scroll", g));
                    var o = t(this), i = t.data(this, k);
                    i && (i[e] = !1), o.unbind(n, D), T(this) || o.removeData(k)
                }
            }
        }

        var E, k = "virtualMouseBindings", X = "virtualTouchID", Y = "vmouseover vmousedown vmousemove vmouseup vclick vmouseout vmousecancel".split(" "), M = "clientX clientY pageX pageY screenX screenY".split(" "), P = t.event.mouseHooks ? t.event.mouseHooks.props : [], S = t.event.props.concat(P), I = {}, x = 0, B = 0, N = 0, j = !1, z = [], F = !1, H = !1, L = "addEventListener" in n, V = t(n), q = 1, Q = 0;
        t.vmouse = {moveDistanceThreshold: 10, clickDistanceThreshold: 10, resetTimerDuration: 1500};
        for (var A = 0; A < Y.length; A++)t.event.special[Y[A]] = y(Y[A]);
        L && n.addEventListener("click", function (e) {
            var n, o, i, r, s, a, c = z.length, u = e.target;
            if (c)for (n = e.clientX, o = e.clientY, E = t.vmouse.clickDistanceThreshold, i = u; i;) {
                for (r = 0; c > r; r++)if (s = z[r], a = 0, i === u && Math.abs(s.x - n) < E && Math.abs(s.y - o) < E || t.data(i, X) === s.touchID)return e.preventDefault(), void e.stopPropagation();
                i = i.parentNode
            }
        }, !0)
    }(t, e, n), function (t) {
        t.mobile = {}
    }(t), function (t) {
        var e = {touch: "ontouchend" in n};
        t.mobile.support = t.mobile.support || {}, t.extend(t.support, e), t.extend(t.mobile.support, e)
    }(t), function (t, e, o) {
        function i(e, n, o) {
            var i = o.type;
            o.type = n, t.event.dispatch.call(e, o), o.type = i
        }

        var r = t(n);
        t.each("touchstart touchmove touchend tap taphold swipe swipeleft swiperight scrollstart scrollstop".split(" "), function (e, n) {
            t.fn[n] = function (t) {
                return t ? this.bind(n, t) : this.trigger(n)
            }, t.attrFn && (t.attrFn[n] = !0)
        });
        var s = t.mobile.support.touch, a = "touchmove scroll", c = s ? "touchstart" : "mousedown", u = s ? "touchend" : "mouseup", l = s ? "touchmove" : "mousemove";
        t.event.special.scrollstart = {
            enabled: !0, setup: function () {
                function e(t, e) {
                    n = e, i(r, n ? "scrollstart" : "scrollstop", t)
                }

                var n, o, r = this, s = t(r);
                s.bind(a, function (i) {
                    t.event.special.scrollstart.enabled && (n || e(i, !0), clearTimeout(o), o = setTimeout(function () {
                        e(i, !1)
                    }, 50))
                })
            }
        }, t.event.special.tap = {
            tapholdThreshold: 750, setup: function () {
                var e = this, n = t(e);
                n.bind("vmousedown", function (o) {
                    function s() {
                        clearTimeout(u)
                    }

                    function a() {
                        s(), n.unbind("vclick", c).unbind("vmouseup", s), r.unbind("vmousecancel", a)
                    }

                    function c(t) {
                        a(), l === t.target && i(e, "tap", t)
                    }

                    if (o.which && 1 !== o.which)return !1;
                    {
                        var u, l = o.target;
                        o.originalEvent
                    }
                    n.bind("vmouseup", s).bind("vclick", c), r.bind("vmousecancel", a), u = setTimeout(function () {
                        i(e, "taphold", t.Event("taphold", {target: l}))
                    }, t.event.special.tap.tapholdThreshold)
                })
            }
        }, t.event.special.swipe = {
            scrollSupressionThreshold: 30,
            durationThreshold: 1e3,
            horizontalDistanceThreshold: 150,
            verticalDistanceThreshold: 75,
            start: function (e) {
                var n = e.originalEvent.touches ? e.originalEvent.touches[0] : e;
                return {time: (new Date).getTime(), coords: [n.pageX, n.pageY], origin: t(e.target)}
            },
            stop: function (t) {
                var e = t.originalEvent.touches ? t.originalEvent.touches[0] : t;
                return {time: (new Date).getTime(), coords: [e.pageX, e.pageY]}
            },
            handleSwipe: function (e, n) {
                n.time - e.time < t.event.special.swipe.durationThreshold && Math.abs(e.coords[0] - n.coords[0]) > t.event.special.swipe.horizontalDistanceThreshold && Math.abs(e.coords[1] - n.coords[1]) < t.event.special.swipe.verticalDistanceThreshold && e.origin.trigger("swipe").trigger(e.coords[0] > n.coords[0] ? "swipeleft" : "swiperight")
            },
            setup: function () {
                var e = this, n = t(e);
                n.bind(c, function (e) {
                    function i(e) {
                        s && (r = t.event.special.swipe.stop(e), Math.abs(s.coords[0] - r.coords[0]) > t.event.special.swipe.scrollSupressionThreshold && e.preventDefault())
                    }

                    var r, s = t.event.special.swipe.start(e);
                    n.bind(l, i).one(u, function () {
                        n.unbind(l, i), s && r && t.event.special.swipe.handleSwipe(s, r), s = r = o
                    })
                })
            }
        }, t.each({
            scrollstop: "scrollstart",
            taphold: "tap",
            swipeleft: "swipe",
            swiperight: "swipe"
        }, function (e, n) {
            t.event.special[e] = {
                setup: function () {
                    t(this).bind(n, t.noop)
                }
            }
        })
    }(t, this)
});
/**************************************
 * Don't change anything from here on
 * if you don't know what you're doing.
 * Otherwise the earth might disappear
 * in a large black hole. We'll blame you!
 **************************************/

;(function () {

    var backToTop;

    jQuery(window).load(function () {

        /**
         * Init back to top button
         */
        backToTop = jQuery("#back-to-top");
        setTimeout(function () {
            backToTop.affix({
                offset: calcOffsetBackToTop()
            });
        }, 100);

    });

    jQuery(window).resize(function () {

        /**
         * Recalculate back to top button offset
         */
        if (typeof backToTop != 'undefined' &&
            typeof backToTop.data('bs.affix') != 'undefined') {

            setTimeout(function () {
                backToTop.data('bs.affix').options.offset = calcOffsetBackToTop();
            }, 100);
        }

    });

    /**
     * Calculate back to top button offset
     * @returns {{top: Function}}
     */
    var calcOffsetBackToTop = function () {
        return {
            top: function () {
                return this.top = jQuery(window).height() / 1.5
            }
        }
    };

})();