fullcalendar.js
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	/*!
	* FullCalendar v2.4.0
	* 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: "2.4.0" };
	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.intersectionToSeg = intersectionToSeg;
	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('> *').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.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
	----------------------------------------------------------------------------------------------------------------------*/


	// Creates a basic segment with 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 intersectionToSeg(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, '&')
	.replace(/</g, '<')
	.replace(/>/g, '>')
	.replace(/'/g, ''')
	.replace(/"/g, '"')
	.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 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, 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, 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, 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?
	if (unit && date1.isSame(date2, 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 upon a class to create a subclass
	Class.extend = function(members) {
	var superClass = this;
	var subClass;

	members = members \|\| {};

	// 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;
	};

	// 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) {
	copyOwnProps(members.prototype \|\| members, this.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 "coordinate map" converts pixel coordinates into an associated cell, which has an associated date
	------------------------------------------------------------------------------------------------------------------------
	Common interface:

	CoordMap.prototype = {
	build: function() {},
	getCell: function(x, y) {}
	};

	*/

	/* Coordinate map for a grid component
	----------------------------------------------------------------------------------------------------------------------*/

	var GridCoordMap = Class.extend({

	grid: null, // reference to the Grid
	rowCoords: null, // array of {top,bottom} objects
	colCoords: null, // array of {left,right} objects

	containerEl: null, // container element that all coordinates are constrained to. optionally assigned
	bounds: null,


	constructor: function(grid) {
	this.grid = grid;
	},


	// Queries the grid for the coordinates of all the cells
	build: function() {
	this.grid.build();
	this.rowCoords = this.grid.computeRowCoords();
	this.colCoords = this.grid.computeColCoords();
	this.computeBounds();
	},


	// Clears the coordinates data to free up memory
	clear: function() {
	this.grid.clear();
	this.rowCoords = null;
	this.colCoords = null;
	},


	// Given a coordinate of the document, gets the associated cell. If no cell is underneath, returns null
	getCell: function(x, y) {
	var rowCoords = this.rowCoords;
	var rowCnt = rowCoords.length;
	var colCoords = this.colCoords;
	var colCnt = colCoords.length;
	var hitRow = null;
	var hitCol = null;
	var i, coords;
	var cell;

	if (this.inBounds(x, y)) {

	for (i = 0; i < rowCnt; i++) {
	coords = rowCoords[i];
	if (y >= coords.top && y < coords.bottom) {
	hitRow = i;
	break;
	}
	}

	for (i = 0; i < colCnt; i++) {
	coords = colCoords[i];
	if (x >= coords.left && x < coords.right) {
	hitCol = i;
	break;
	}
	}

	if (hitRow !== null && hitCol !== null) {

	cell = this.grid.getCell(hitRow, hitCol); // expected to return a fresh object we can modify
	cell.grid = this.grid; // for CellDragListener's isCellsEqual. dragging between grids

	// make the coordinates available on the cell object
	$.extend(cell, rowCoords[hitRow], colCoords[hitCol]);

	return cell;
	}
	}

	return null;
	},


	// If there is a containerEl, compute the bounds into min/max values
	computeBounds: function() {
	this.bounds = this.containerEl ?
	getClientRect(this.containerEl) : // area within scrollbars
	null;
	},


	// Determines if the given coordinates are in bounds. If no `containerEl`, always true
	inBounds: function(x, y) {
	var bounds = this.bounds;

	if (bounds) {
	return x >= bounds.left && x < bounds.right && y >= bounds.top && y < bounds.bottom;
	}

	return true;
	}

	});


	/* Coordinate map that is a combination of multiple other coordinate maps
	----------------------------------------------------------------------------------------------------------------------*/

	var ComboCoordMap = Class.extend({

	coordMaps: null, // an array of CoordMaps


	constructor: function(coordMaps) {
	this.coordMaps = coordMaps;
	},


	// Builds all coordMaps
	build: function() {
	var coordMaps = this.coordMaps;
	var i;

	for (i = 0; i < coordMaps.length; i++) {
	coordMaps[i].build();
	}
	},


	// Queries all coordMaps for the cell underneath the given coordinates, returning the first result
	getCell: function(x, y) {
	var coordMaps = this.coordMaps;
	var cell = null;
	var i;

	for (i = 0; i < coordMaps.length && !cell; i++) {
	cell = coordMaps[i].getCell(x, y);
	}

	return cell;
	},


	// Clears all coordMaps
	clear: function() {
	var coordMaps = this.coordMaps;
	var i;

	for (i = 0; i < coordMaps.length; i++) {
	coordMaps[i].clear();
	}
	}

	});

	;;

	/* Tracks a drag's mouse movement, firing various handlers
	----------------------------------------------------------------------------------------------------------------------*/

	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 CoordMap and raises events about which cell the mouse is over.
	------------------------------------------------------------------------------------------------------------------------
	options:
	- subjectEl
	- subjectCenter
	*/

	var CellDragListener = DragListener.extend({

	coordMap: null, // converts coordinates to date cells
	origCell: null, // the cell the mouse was over when listening started
	cell: null, // the cell the mouse is over
	coordAdjust: null, // delta that will be added to the mouse coordinates when computing collisions


	constructor: function(coordMap, options) {
	DragListener.prototype.constructor.call(this, options); // call the super-constructor

	this.coordMap = coordMap;
	},


	// 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.origCell = this.getCell(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 cell. best for large subjects
	if (this.origCell) {
	subjectRect = intersectRects(this.origCell, subjectRect) \|\|
	subjectRect; // in case there is no intersection
	}

	point = getRectCenter(subjectRect);
	}

	this.coordAdjust = diffPoints(point, origPoint); // point - origPoint
	}
	else {
	this.origCell = null;
	this.coordAdjust = null;
	}
	},


	// Recomputes the drag-critical positions of elements
	computeCoords: function() {
	this.coordMap.build();
	this.computeScrollBounds();
	},


	// Called when the actual drag has started
	dragStart: function(ev) {
	var cell;

	DragListener.prototype.dragStart.apply(this, arguments); // call the super-method

	cell = this.getCell(ev.pageX, ev.pageY); // might be different from this.origCell if the min-distance is large

	// report the initial cell the mouse is over
	// especially important if no min-distance and drag starts immediately
	if (cell) {
	this.cellOver(cell);
	}
	},


	// Called when the drag moves
	drag: function(dx, dy, ev) {
	var cell;

	DragListener.prototype.drag.apply(this, arguments); // call the super-method

	cell = this.getCell(ev.pageX, ev.pageY);

	if (!isCellsEqual(cell, this.cell)) { // a different cell than before?
	if (this.cell) {
	this.cellOut();
	}
	if (cell) {
	this.cellOver(cell);
	}
	}
	},


	// Called when dragging has been stopped
	dragStop: function() {
	this.cellDone();
	DragListener.prototype.dragStop.apply(this, arguments); // call the super-method
	},


	// Called when a the mouse has just moved over a new cell
	cellOver: function(cell) {
	this.cell = cell;
	this.trigger('cellOver', cell, isCellsEqual(cell, this.origCell), this.origCell);
	},


	// Called when the mouse has just moved out of a cell
	cellOut: function() {
	if (this.cell) {
	this.trigger('cellOut', this.cell);
	this.cellDone();
	this.cell = null;
	}
	},


	// Called after a cellOut. Also called before a dragStop
	cellDone: function() {
	if (this.cell) {
	this.trigger('cellDone', this.cell);
	}
	},


	// Called when drag listening has stopped
	listenStop: function() {
	DragListener.prototype.listenStop.apply(this, arguments); // call the super-method

	this.origCell = this.cell = null;
	this.coordMap.clear();
	},


	// 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(); // cells' absolute positions will be in new places. recompute
	},


	// Gets the cell underneath the coordinates for the given mouse event
	getCell: function(left, top) {

	if (this.coordAdjust) {
	left += this.coordAdjust.left;
	top += this.coordAdjust.top;
	}

	return this.coordMap.getCell(left, top);
	}

	});


	// Returns `true` if the cells are identically equal. `false` otherwise.
	// They must have the same row, col, and be from the same grid.
	// Two null values will be considered equal, as two "out of the grid" states are the same.
	function isCellsEqual(cell1, cell2) {

	if (!cell1 && !cell2) {
	return true;
	}

	if (cell1 && cell2) {
	return cell1.grid === cell2.grid &&
	cell1.row === cell2.row &&
	cell1.col === cell2.col;
	}

	return false;
	}

	;;

	/* 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();
	}
	}

	});

	;;

	/* A utility class for rendering <tr> rows.
	----------------------------------------------------------------------------------------------------------------------*/
	// It leverages methods of the subclass and the View to determine custom rendering behavior for each row "type"
	// (such as highlight rows, day rows, helper rows, etc).

	var RowRenderer = Class.extend({

	view: null, // a View object
	isRTL: null, // shortcut to the view's isRTL option
	cellHtml: '<td/>', // plain default HTML used for a cell when no other is available


	constructor: function(view) {
	this.view = view;
	this.isRTL = view.opt('isRTL');
	},


	// Renders the HTML for a row, leveraging custom cell-HTML-renderers based on the `rowType`.
	// Also applies the "intro" and "outro" cells, which are specified by the subclass and views.
	// `row` is an optional row number.
	rowHtml: function(rowType, row) {
	var renderCell = this.getHtmlRenderer('cell', rowType);
	var rowCellHtml = '';
	var col;
	var cell;

	row = row \|\| 0;

	for (col = 0; col < this.colCnt; col++) {
	cell = this.getCell(row, col);
	rowCellHtml += renderCell(cell);
	}

	rowCellHtml = this.bookendCells(rowCellHtml, rowType, row); // apply intro and outro

	return '<tr>' + rowCellHtml + '</tr>';
	},


	// Applies the "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.
	// `cells` can be an HTML string of <td>'s or a jQuery <tr> element
	// `row` is an optional row number.
	bookendCells: function(cells, rowType, row) {
	var intro = this.getHtmlRenderer('intro', rowType)(row \|\| 0);
	var outro = this.getHtmlRenderer('outro', rowType)(row \|\| 0);
	var prependHtml = this.isRTL ? outro : intro;
	var appendHtml = this.isRTL ? intro : outro;

	if (typeof cells === 'string') {
	return prependHtml + cells + appendHtml;
	}
	else { // a jQuery <tr> element
	return cells.prepend(prependHtml).append(appendHtml);
	}
	},


	// Returns an HTML-rendering function given a specific `rendererName` (like cell, intro, or outro) and a specific
	// `rowType` (like day, eventSkeleton, helperSkeleton), which is optional.
	// If a renderer for the specific rowType doesn't exist, it will fall back to a generic renderer.
	// We will query the View object first for any custom rendering functions, then the methods of the subclass.
	getHtmlRenderer: function(rendererName, rowType) {
	var view = this.view;
	var generalName; // like "cellHtml"
	var specificName; // like "dayCellHtml". based on rowType
	var provider; // either the View or the RowRenderer subclass, whichever provided the method
	var renderer;

	generalName = rendererName + 'Html';
	if (rowType) {
	specificName = rowType + capitaliseFirstLetter(rendererName) + 'Html';
	}

	if (specificName && (renderer = view[specificName])) {
	provider = view;
	}
	else if (specificName && (renderer = this[specificName])) {
	provider = this;
	}
	else if ((renderer = view[generalName])) {
	provider = view;
	}
	else if ((renderer = this[generalName])) {
	provider = this;
	}

	if (typeof renderer === 'function') {
	return function() {
	return renderer.apply(provider, arguments) \|\| ''; // use correct `this` and always return a string
	};
	}

	// the rendered can be a plain string as well. if not specified, always an empty string.
	return function() {
	return renderer \|\| '';
	};
	}

	});

	;;

	/* An abstract class comprised of a "grid" of cells that each represent a specific datetime
	----------------------------------------------------------------------------------------------------------------------*/

	var Grid = fc.Grid = RowRenderer.extend({

	start: null, // the date of the first cell
	end: null, // the date after the last cell

	rowCnt: 0, // number of rows
	colCnt: 0, // number of cols

	el: null, // the containing element
	coordMap: null, // a GridCoordMap that converts pixel values to datetimes
	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
	colHeadFormat: null, // TODO: move to another class. not applicable to all Grids
	eventTimeFormat: null,
	displayEventTime: null,
	displayEventEnd: null,

	// if all cells are the same length of time, the duration they all share. optional.
	// when defined, allows the computeCellRange shortcut, as well as improved resizing behavior.
	cellDuration: null,

	// if defined, holds the unit identified (ex: "year" or "month") that determines the level of granularity
	// of the date cells. if not defined, assumes to be day and time granularity.
	largeUnit: null,


	constructor: function() {
	RowRenderer.apply(this, arguments); // call the super-constructor

	this.coordMap = new GridCoordMap(this);
	this.elsByFill = {};
	this.externalDragStartProxy = proxy(this, 'externalDragStart');
	},


	/* Options
	------------------------------------------------------------------------------------------------------------------*/


	// Generates the format string used for the text in column headers, if not explicitly defined by 'columnFormat'
	// TODO: move to another class. not applicable to all Grids
	computeColHeadFormat: function() {
	// subclasses must implement if they want to use headHtml()
	},


	// 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 cell system 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;

	// Populate option-derived settings. Look for override first, then compute if necessary.
	this.colHeadFormat = view.opt('columnFormat') \|\| this.computeColHeadFormat();

	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;
	},


	// Called before the grid's coordinates will need to be queried for cells.
	// Any non-date-related cell system internal data should be built.
	build: function() {
	},


	// Called after the grid's coordinates are done being relied upon.
	// Any non-date-related cell system internal data should be cleared.
	clear: function() {
	},


	// Converts a range with an inclusive `start` and an exclusive `end` into an array of segment objects
	rangeToSegs: function(range) {
	// subclasses must implement
	},


	// Diffs the two dates, returning a duration, based on granularity of the grid
	diffDates: function(a, b) {
	if (this.largeUnit) {
	return diffByUnit(a, b, this.largeUnit);
	}
	else {
	return diffDayTime(a, b);
	}
	},


	/* Cells
	------------------------------------------------------------------------------------------------------------------*/
	// NOTE: columns are ordered left-to-right


	// Gets an object containing row/col number, misc data, and range information about the cell.
	// Accepts row/col values, an object with row/col properties, or a single-number offset from the first cell.
	getCell: function(row, col) {
	var cell;

	if (col == null) {
	if (typeof row === 'number') { // a single-number offset
	col = row % this.colCnt;
	row = Math.floor(row / this.colCnt);
	}
	else { // an object with row/col properties
	col = row.col;
	row = row.row;
	}
	}

	cell = { row: row, col: col };

	$.extend(cell, this.getRowData(row), this.getColData(col));
	$.extend(cell, this.computeCellRange(cell));

	return cell;
	},


	// Given a cell object with index and misc data, generates a range object
	// If the grid is leveraging cellDuration, this doesn't need to be defined. Only computeCellDate does.
	// If being overridden, should return a range with reference-free date copies.
	computeCellRange: function(cell) {
	var date = this.computeCellDate(cell);

	return {
	start: date,
	end: date.clone().add(this.cellDuration)
	};
	},


	// Given a cell, returns its start date. Should return a reference-free date copy.
	computeCellDate: function(cell) {
	// subclasses can implement
	},


	// Retrieves misc data about the given row
	getRowData: function(row) {
	return {};
	},


	// Retrieves misc data baout the given column
	getColData: function(col) {
	return {};
	},


	// Retrieves the element representing the given row
	getRowEl: function(row) {
	// subclasses should implement if leveraging the default getCellDayEl() or computeRowCoords()
	},


	// Retrieves the element representing the given column
	getColEl: function(col) {
	// subclasses should implement if leveraging the default getCellDayEl() or computeColCoords()
	},


	// Given a cell object, returns the element that represents the cell's whole-day
	getCellDayEl: function(cell) {
	return this.getColEl(cell.col) \|\| this.getRowEl(cell.row);
	},


	/* Cell Coordinates
	------------------------------------------------------------------------------------------------------------------*/


	// Computes the top/bottom coordinates of all rows.
	// By default, queries the dimensions of the element provided by getRowEl().
	computeRowCoords: function() {
	var items = [];
	var i, el;
	var top;

	for (i = 0; i < this.rowCnt; i++) {
	el = this.getRowEl(i);
	top = el.offset().top;
	items.push({
	top: top,
	bottom: top + el.outerHeight()
	});
	}

	return items;
	},


	// Computes the left/right coordinates of all rows.
	// By default, queries the dimensions of the element provided by getColEl(). Columns can be LTR or RTL.
	computeColCoords: function() {
	var items = [];
	var i, el;
	var left;

	for (i = 0; i < this.colCnt; i++) {
	el = this.getColEl(i);
	left = el.offset().left;
	items.push({
	left: left,
	right: left + el.outerWidth()
	});
	}

	return items;
	},


	/* 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 cells 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 dayClickCell; // null if invalid dayClick
	var selectionRange; // 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 CellDragListener(this.coordMap, {
	//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
	},
	cellOver: function(cell, isOrig, origCell) {
	if (origCell) { // click needs to have started on a cell
	dayClickCell = isOrig ? cell : null; // single-cell selection is a day click
	if (isSelectable) {
	selectionRange = _this.computeSelection(origCell, cell);
	if (selectionRange) {
	_this.renderSelection(selectionRange);
	}
	else {
	disableCursor();
	}
	}
	}
	},
	cellOut: function(cell) {
	dayClickCell = null;
	selectionRange = null;
	_this.unrenderSelection();
	enableCursor();
	},
	listenStop: function(ev) {
	if (dayClickCell) {
	view.triggerDayClick(dayClickCell, _this.getCellDayEl(dayClickCell), ev);
	}
	if (selectionRange) {
	// the selection will already have been rendered. just report it
	view.reportSelection(selectionRange, 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 over the given range
	renderRangeHelper: function(range, sourceSeg) {
	var fakeEvent = this.fabricateHelperEvent(range, sourceSeg);

	this.renderHelper(fakeEvent, sourceSeg); // do the actual rendering
	},


	// Builds a fake event given a date range it should cover, 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(range, sourceSeg) {
	var fakeEvent = sourceSeg ? createObject(sourceSeg.event) : {}; // mask the original event object if possible

	fakeEvent.start = range.start.clone();
	fakeEvent.end = range.end ? range.end.clone() : null;
	fakeEvent.allDay = null; // force it to be freshly computed by normalizeEventRange
	this.view.calendar.normalizeEventRange(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
	renderHelper: function(event, 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.
	renderSelection: function(range) {
	this.renderHighlight(this.selectionRangeToSegs(range));
	},


	// Unrenders any visual indications of a selection. Will unrender a highlight by default.
	unrenderSelection: function() {
	this.unrenderHighlight();
	},


	// Given the first and last cells of a selection, returns a range object.
	// Will return something falsy if the selection is invalid (when outside of selectionConstraint for example).
	// Subclasses can override and provide additional data in the range object. Will be passed to renderSelection().
	computeSelection: function(firstCell, lastCell) {
	var dates = [
	firstCell.start,
	firstCell.end,
	lastCell.start,
	lastCell.end
	];
	var range;

	dates.sort(compareNumbers); // sorts chronologically. works with Moments

	range = {
	start: dates[0].clone(),
	end: dates[3].clone()
	};

	if (!this.view.calendar.isSelectionRangeAllowed(range)) {
	return null;
	}

	return range;
	},


	selectionRangeToSegs: function(range) {
	return this.rangeToSegs(range);
	},


	/* Highlight
	------------------------------------------------------------------------------------------------------------------*/


	// Renders an emphasis on the given date range. Given an array of segments.
	renderHighlight: function(segs) {
	this.renderFill('highlight', segs);
	},


	// 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' ];
	},


	/* Fill System (highlight, background events, business hours)
	------------------------------------------------------------------------------------------------------------------*/


	// 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
	------------------------------------------------------------------------------------------------------------------*/


	// Renders a day-of-week header row.
	// TODO: move to another class. not applicable to all Grids
	headHtml: function() {
	return '' +
	'<div class="fc-row ' + this.view.widgetHeaderClass + '">' +
	'<table>' +
	'<thead>' +
	this.rowHtml('head') + // leverages RowRenderer
	'</thead>' +
	'</table>' +
	'</div>';
	},


	// Used by the `headHtml` method, via RowRenderer, for rendering the HTML of a day-of-week header cell
	// TODO: move to another class. not applicable to all Grids
	headCellHtml: function(cell) {
	var view = this.view;
	var date = cell.start;

	return '' +
	'<th class="fc-day-header ' + view.widgetHeaderClass + ' fc-' + dayIDs[date.day()] + '">' +
	htmlEscape(date.format(this.colHeadFormat)) +
	'</th>';
	},


	// Renders the HTML for a single-day background cell
	bgCellHtml: function(cell) {
	var view = this.view;
	var date = cell.start;
	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
	'></td>';
	},


	// Computes HTML classNames for a single-day cell
	getDayClasses: function(date) {
	var view = this.view;
	var today = view.calendar.getNow().stripTime();
	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


	// Renders the given events onto the grid
	renderEvents: function(events) {
	var segs = this.eventsToSegs(events);
	var bgSegs = [];
	var fgSegs = [];
	var i, seg;

	for (i = 0; i < segs.length; i++) {
	seg = segs[i];

	if (isBgEvent(seg.event)) {
	bgSegs.push(seg);
	}
	else {
	fgSegs.push(seg);
	}
	}

	// Render each different type of segment.
	// Each function may return a subset of the segs, segs that were actually rendered.
	bgSegs = this.renderBgSegs(bgSegs) \|\| bgSegs;
	fgSegs = this.renderFgSegs(fgSegs) \|\| fgSegs;

	this.segs = bgSegs.concat(fgSegs);
	},


	// 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;

	// 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 CellDragListener(view.coordMap, {
	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
	},
	cellOver: function(cell, isOrig, origCell) {

	// starting cell could be forced (DayGrid.limit)
	if (seg.cell) {
	origCell = seg.cell;
	}

	dropLocation = _this.computeEventDrop(origCell, cell, event);

	if (dropLocation && !calendar.isEventRangeAllowed(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 cells to be a valid drop
	}
	},
	cellOut: function() { // called before mouse moves to a different cell OR moved out of all cells
	view.unrenderDrag(); // unrender whatever was done in renderDrag
	mouseFollower.show(); // show in case we are moving out of all cells
	dropLocation = null;
	},
	cellDone: function() { // Called after a cellOut 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 cell an event drag began, and the cell event was dropped, calculates the new 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.
	computeEventDrop: function(startCell, endCell, event) {
	var calendar = this.view.calendar;
	var dragStart = startCell.start;
	var dragEnd = endCell.start;
	var delta;
	var dropLocation;

	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 normalizeEventRangeTimes
	};
	calendar.normalizeEventRangeTimes(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 cell dropping
	listenToExternalDrag: function(el, ev, ui) {
	var _this = this;
	var meta = getDraggedElMeta(el); // extra data about event drop, including possible event to create
	var dragListener;
	var dropLocation; // a null value signals an unsuccessful drag

	// listener that tracks mouse movement over date-associated pixel regions
	dragListener = new CellDragListener(this.coordMap, {
	listenStart: function() {
	_this.isDraggingExternal = true;
	},
	cellOver: function(cell) {
	dropLocation = _this.computeExternalDrop(cell, meta);
	if (dropLocation) {
	_this.renderDrag(dropLocation); // called without a seg parameter
	}
	else { // invalid drop cell
	disableCursor();
	}
	},
	cellOut: function() {
	dropLocation = null; // signal unsuccessful
	_this.unrenderDrag();
	enableCursor();
	},
	dragStop: function() {
	_this.unrenderDrag();
	enableCursor();

	if (dropLocation) { // element was dropped on a valid date/time cell
	_this.view.reportExternalDrop(meta, dropLocation, el, ev, ui);
	}
	},
	listenStop: function() {
	_this.isDraggingExternal = false;
	}
	});

	dragListener.startDrag(ev); // start listening immediately
	},


	// Given a cell to be dropped upon, and misc data associated with the jqui drag (guaranteed to be a plain object),
	// returns 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 cell.
	computeExternalDrop: function(cell, meta) {
	var dropLocation = {
	start: cell.start.clone(),
	end: null
	};

	// if dropped on an all-day cell, 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);
	}

	if (!this.view.calendar.isExternalDropRangeAllowed(dropLocation, meta.eventProps)) {
	return null;
	}

	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 dragListener;
	var resizeLocation; // falsy if invalid resize

	// Tracks mouse movement over the grid's coordinate map
	dragListener = new CellDragListener(this.coordMap, {
	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);
	},
	cellOver: function(cell, isOrig, origCell) {
	resizeLocation = isStart ?
	_this.computeEventStartResize(origCell, cell, event) :
	_this.computeEventEndResize(origCell, cell, event);

	if (resizeLocation) {
	if (!calendar.isEventRangeAllowed(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);
	}
	},
	cellOut: function() { // called before mouse moves to a different cell OR moved out of all cells
	resizeLocation = null;
	},
	cellDone: 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(startCell, endCell, event) {
	return this.computeEventResize('start', startCell, endCell, event);
	},


	// Returns new date-information for an event segment being resized from its end
	computeEventEndResize: function(startCell, endCell, event) {
	return this.computeEventResize('end', startCell, endCell, event);
	},


	// Returns new date-information for an event segment being resized from its start OR end
	// `type` is either 'start' or 'end'
	computeEventResize: function(type, startCell, endCell, event) {
	var calendar = this.view.calendar;
	var delta = this.diffDates(endCell[type], startCell[type]);
	var range;
	var defaultDuration;

	// build original values to work from, guaranteeing a start and end
	range = {
	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 (range.allDay && durationHasTime(delta)) {
	range.allDay = false;
	calendar.normalizeEventRangeTimes(range);
	}

	range[type].add(delta); // apply delta to start or end

	// if the event was compressed too small, find a new reasonable duration for it
	if (!range.start.isBefore(range.end)) {

	defaultDuration = event.allDay ?
	calendar.defaultAllDayEventDuration :
	calendar.defaultTimedEventDuration;

	// between the cell's duration and the event's default duration, use the smaller of the two.
	// example: if year-length slots, and compressed to one slot, we don't want the event to be a year long
	if (this.cellDuration && this.cellDuration < defaultDuration) {
	defaultDuration = this.cellDuration;
	}

	if (type == 'start') { // resizing the start?
	range.start = range.end.clone().subtract(defaultDuration);
	}
	else { // resizing the end?
	range.end = range.start.clone().add(defaultDuration);
	}
	}

	return range;
	},


	// 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 -> ranges -> segs
	------------------------------------------------------------------------------------------------------------------*/


	// Converts an array of event objects into an array of event segment objects.
	// A custom `rangeToSegsFunc` may be given for arbitrarily slicing up events.
	// Doesn't guarantee an order for the resulting array.
	eventsToSegs: function(events, rangeToSegsFunc) {
	var eventRanges = this.eventsToRanges(events);
	var segs = [];
	var i;

	for (i = 0; i < eventRanges.length; i++) {
	segs.push.apply(
	segs,
	this.eventRangeToSegs(eventRanges[i], rangeToSegsFunc)
	);
	}

	return segs;
	},


	// Converts an array of events into an array of "range" objects.
	// A "range" object is a plain object with start/end properties denoting the time it covers. Also an event property.
	// For "normal" events, this will be identical to the event's start/end, but for "inverse-background" events,
	// will create an array of ranges that span the time not covered by the given event.
	// Doesn't guarantee an order for the resulting array.
	eventsToRanges: function(events) {
	var _this = this;
	var eventsById = groupEventsById(events);
	var ranges = [];

	// group by ID so that related inverse-background events can be rendered together
	$.each(eventsById, function(id, eventGroup) {
	if (eventGroup.length) {
	ranges.push.apply(
	ranges,
	isInverseBgEvent(eventGroup[0]) ?
	_this.eventsToInverseRanges(eventGroup) :
	_this.eventsToNormalRanges(eventGroup)
	);
	}
	});

	return ranges;
	},


	// Converts an array of "normal" events (not inverted rendering) into a parallel array of ranges
	eventsToNormalRanges: function(events) {
	var calendar = this.view.calendar;
	var ranges = [];
	var i, event;
	var eventStart, eventEnd;

	for (i = 0; i < events.length; i++) {
	event = events[i];

	// make copies and normalize by stripping timezone
	eventStart = event.start.clone().stripZone();
	eventEnd = calendar.getEventEnd(event).stripZone();

	ranges.push({
	event: event,
	start: eventStart,
	end: eventEnd,
	eventStartMS: +eventStart,
	eventDurationMS: eventEnd - eventStart
	});
	}

	return ranges;
	},


	// Converts an array of events, with inverse-background rendering, into an array of range objects.
	// The range objects will cover all the time NOT covered by the events.
	eventsToInverseRanges: function(events) {
	var view = this.view;
	var viewStart = view.start.clone().stripZone(); // normalize timezone
	var viewEnd = view.end.clone().stripZone(); // normalize timezone
	var normalRanges = this.eventsToNormalRanges(events); // will give us normalized dates we can use w/o copies
	var inverseRanges = [];
	var event0 = events[0]; // assign this to each range's `.event`
	var start = viewStart; // the end of the previous range. the start of the new range
	var i, normalRange;

	// ranges need to be in order. required for our date-walking algorithm
	normalRanges.sort(compareNormalRanges);

	for (i = 0; i < normalRanges.length; i++) {
	normalRange = normalRanges[i];

	// add the span of time before the event (if there is any)
	if (normalRange.start > start) { // compare millisecond time (skip any ambig logic)
	inverseRanges.push({
	event: event0,
	start: start,
	end: normalRange.start
	});
	}

	start = normalRange.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({
	event: event0,
	start: start,
	end: viewEnd
	});
	}

	return inverseRanges;
	},


	// Slices the given event range into one or more segment objects.
	// A `rangeToSegsFunc` custom slicing function can be given.
	eventRangeToSegs: function(eventRange, rangeToSegsFunc) {
	var segs;
	var i, seg;

	eventRange = this.view.calendar.ensureVisibleEventRange(eventRange);

	if (rangeToSegsFunc) {
	segs = rangeToSegsFunc(eventRange);
	}
	else {
	segs = this.rangeToSegs(eventRange); // defined by the subclass
	}

	for (i = 0; i < segs.length; i++) {
	seg = segs[i];
	seg.event = eventRange.event;
	seg.eventStartMS = eventRange.eventStartMS;
	seg.eventDurationMS = eventRange.eventDurationMS;
	}

	return segs;
	},


	sortSegs: function(segs) {
	segs.sort(proxy(this, 'compareSegs'));
	},


	// A cmp function for determining which segments should take visual priority
	// DOES NOT WORK ON INVERTED BACKGROUND EVENTS because they have no eventStartMS/eventDurationMS
	compareSegs: 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';
	}


	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 compareNormalRanges(range1, range2) {
	return range1.eventStartMS - range2.eventStartMS; // 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 component that renders a grid of whole-days that runs horizontally. There can be multiple rows, one per week.
	----------------------------------------------------------------------------------------------------------------------*/

	var DayGrid = Grid.extend({

	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
	breakOnWeeks: null, // should create a new row for each week? set by outside view

	cellDates: null, // flat chronological array of each cell's dates
	dayToCellOffsets: null, // maps days offsets from grid's start date, to cell offsets

	rowEls: null, // set of fake row elements
	dayEls: null, // set of whole-day elements comprising the row's background
	helperEls: null, // set of cell skeleton elements for rendering the mock event "helper"


	constructor: function() {
	Grid.apply(this, arguments);

	this.cellDuration = moment.duration(1, 'day'); // for Grid system
	},


	// 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 cellCnt = rowCnt * colCnt;
	var html = '';
	var row;
	var i, cell;

	for (row = 0; row < rowCnt; row++) {
	html += this.dayRowHtml(row, isRigid);
	}
	this.el.html(html);

	this.rowEls = this.el.find('.fc-row');
	this.dayEls = this.el.find('.fc-day');

	// trigger dayRender with each cell's element
	for (i = 0; i < cellCnt; i++) {
	cell = this.getCell(i);
	view.trigger('dayRender', null, cell.start, this.dayEls.eq(i));
	}
	},


	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. `row` is the row number.
	dayRowHtml: 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.rowHtml('day', row) + // leverages RowRenderer. calls dayCellHtml()
	'</table>' +
	'</div>' +
	'<div class="fc-content-skeleton">' +
	'<table>' +
	(this.numbersVisible ?
	'<thead>' +
	this.rowHtml('number', row) + // leverages RowRenderer. View will define render method
	'</thead>' :
	''
	) +
	'</table>' +
	'</div>' +
	'</div>';
	},


	// Renders the HTML for a whole-day cell. Will eventually end up in the day-row's background.
	// We go through a 'day' row type instead of just doing a 'bg' row type so that the View can do custom rendering
	// specifically for whole-day rows, whereas a 'bg' might also be used for other purposes (TimeGrid bg for example).
	dayCellHtml: function(cell) {
	return this.bgCellHtml(cell);
	},


	/* Options
	------------------------------------------------------------------------------------------------------------------*/


	// Computes a default column header formatting string if `colFormat` is not explicitly defined
	computeColHeadFormat: function() {
	if (this.rowCnt > 1) { // more than one week row. day numbers will be in each cell
	return 'ddd'; // "Sat"
	}
	else if (this.colCnt > 1) { // multiple days, so full single date string WON'T be in title text
	return this.view.opt('dayOfMonthFormat'); // "Sat 12/10"
	}
	else { // single day, so full single date string will probably be in title text
	return 'dddd'; // "Saturday"
	}
	},


	// 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
	},


	/* Cell System
	------------------------------------------------------------------------------------------------------------------*/


	rangeUpdated: function() {
	var cellDates;
	var firstDay;
	var rowCnt;
	var colCnt;

	this.updateCellDates(); // populates cellDates and dayToCellOffsets
	cellDates = this.cellDates;

	if (this.breakOnWeeks) {
	// count columns until the day-of-week repeats
	firstDay = cellDates[0].day();
	for (colCnt = 1; colCnt < cellDates.length; colCnt++) {
	if (cellDates[colCnt].day() == firstDay) {
	break;
	}
	}
	rowCnt = Math.ceil(cellDates.length / colCnt);
	}
	else {
	rowCnt = 1;
	colCnt = cellDates.length;
	}

	this.rowCnt = rowCnt;
	this.colCnt = colCnt;
	},


	// Populates cellDates and dayToCellOffsets
	updateCellDates: function() {
	var view = this.view;
	var date = this.start.clone();
	var dates = [];
	var offset = -1;
	var offsets = [];

	while (date.isBefore(this.end)) { // loop each day from start to end
	if (view.isHiddenDay(date)) {
	offsets.push(offset + 0.5); // mark that it's between offsets
	}
	else {
	offset++;
	offsets.push(offset);
	dates.push(date.clone());
	}
	date.add(1, 'days');
	}

	this.cellDates = dates;
	this.dayToCellOffsets = offsets;
	},


	// Given a cell object, generates its start date. Returns a reference-free copy.
	computeCellDate: function(cell) {
	var colCnt = this.colCnt;
	var index = cell.row * colCnt + (this.isRTL ? colCnt - cell.col - 1 : cell.col);

	return this.cellDates[index].clone();
	},


	// Retrieves the element representing the given row
	getRowEl: function(row) {
	return this.rowEls.eq(row);
	},


	// Retrieves the element representing the given column
	getColEl: function(col) {
	return this.dayEls.eq(col);
	},


	// Gets the whole-day element associated with the cell
	getCellDayEl: function(cell) {
	return this.dayEls.eq(cell.row * this.colCnt + cell.col);
	},


	// Overrides Grid's method for when row coordinates are computed
	computeRowCoords: function() {
	var rowCoords = Grid.prototype.computeRowCoords.call(this); // call the super-method

	// hack for extending last row (used by AgendaView)
	rowCoords[rowCoords.length - 1].bottom += this.bottomCoordPadding;

	return rowCoords;
	},


	/* Dates
	------------------------------------------------------------------------------------------------------------------*/


	// Slices up a date range by row into an array of segments
	rangeToSegs: function(range) {
	var isRTL = this.isRTL;
	var rowCnt = this.rowCnt;
	var colCnt = this.colCnt;
	var segs = [];
	var first, last; // inclusive cell-offset range for given range
	var row;
	var rowFirst, rowLast; // inclusive cell-offset range for current row
	var isStart, isEnd;
	var segFirst, segLast; // inclusive cell-offset range for segment
	var seg;

	range = this.view.computeDayRange(range); // make whole-day range, considering nextDayThreshold
	first = this.dateToCellOffset(range.start);
	last = this.dateToCellOffset(range.end.subtract(1, 'days')); // offset of inclusive end date

	for (row = 0; row < rowCnt; row++) {
	rowFirst = row * colCnt;
	rowLast = rowFirst + colCnt - 1;

	// intersect segment's offset range with the row's
	segFirst = Math.max(rowFirst, first);
	segLast = Math.min(rowLast, last);

	// 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?

	// must be matching integers to be the segment's start/end
	isStart = segFirst === first;
	isEnd = segLast === last;

	// translate offsets to be relative to start-of-row
	segFirst -= rowFirst;
	segLast -= rowFirst;

	seg = { row: row, isStart: isStart, isEnd: isEnd };
	if (isRTL) {
	seg.leftCol = colCnt - segLast - 1;
	seg.rightCol = colCnt - segFirst - 1;
	}
	else {
	seg.leftCol = segFirst;
	seg.rightCol = segLast;
	}
	segs.push(seg);
	}
	}

	return segs;
	},


	// Given a date, returns its chronolocial cell-offset 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.
	dateToCellOffset: function(date) {
	var offsets = this.dayToCellOffsets;
	var day = date.diff(this.start, 'days');

	if (day < 0) {
	return offsets[0] - 1;
	}
	else if (day >= offsets.length) {
	return offsets[offsets.length - 1] + 1;
	}
	else {
	return offsets[day];
	}
	},


	/* 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.
	// The dropLocation's end can be null. seg can be null. See Grid::renderDrag for more info.
	renderDrag: function(dropLocation, seg) {

	// always render a highlight underneath
	this.renderHighlight(this.eventRangeToSegs(dropLocation));

	// 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.renderRangeHelper(dropLocation, 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(range, seg) {
	this.renderHighlight(this.eventRangeToSegs(range));
	this.renderRangeHelper(range, 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.eventsToSegs([ 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, type);

	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 \|\| '') \|\| ' ') + // 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, 'eventSkeleton');
	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.sortSegs(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 cell;
	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) {
	cell = _this.getCell(row, col);
	segsBelow = _this.getCellSegs(cell, levelLimit);
	if (segsBelow.length) {
	td = cellMatrix[levelLimit - 1][col];
	moreLink = _this.renderMoreLink(cell, 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) {
	cell = this.getCell(row, col);
	segsBelow = this.getCellSegs(cell, 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];
	cell = this.getCell(row, seg.leftCol + j);
	moreLink = this.renderMoreLink(cell, [ 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(cell, 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 = cell.start;
	var moreEl = $(this);
	var dayEl = _this.getCellDayEl(cell);
	var allSegs = _this.getCellSegs(cell);

	// 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(cell, 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(cell, 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(cell.row); // will align with top of row
	}

	options = {
	className: 'fc-more-popover',
	content: this.renderSegPopoverContent(cell, 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(cell, segs) {
	var view = this.view;
	var isTheme = view.opt('theme');
	var title = cell.start.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
	segs[i].cell = cell;

	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().stripTime();
	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 = intersectionToSeg(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.sortSegs(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(cell, startLevel) {
	var segMatrix = this.rowStructs[cell.row].segMatrix;
	var level = startLevel \|\| 0;
	var segs = [];
	var seg;

	while (level < segMatrix.length) {
	seg = segMatrix[level][cell.col];
	if (seg) {
	segs.push(seg);
	}
	level++;
	}

	return segs;
	}

	});

	;;

	/* A component that renders one or more columns of vertical time slots
	----------------------------------------------------------------------------------------------------------------------*/

	var TimeGrid = Grid.extend({

	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
	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
	colDates: null, // whole-day dates for each column. left to right
	labelFormat: null, // formatting string for times running along vertical axis
	labelInterval: null, // duration of how often a label should be displayed for a slot

	dayEls: null, // cells elements in the day-row background
	slatEls: null, // elements running horizontally across all columns

	slatTops: null, // an array of top positions, relative to the container. last item holds bottom of last slot

	helperEl: null, // cell skeleton element for rendering the mock event "helper"

	businessHourSegs: 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.dayEls = this.el.find('.fc-day');
	this.slatEls = this.el.find('.fc-slats tr');
	},


	renderBusinessHours: function() {
	var events = this.view.calendar.getBusinessHoursEvents();
	this.businessHourSegs = this.renderFill('businessHours', this.eventsToSegs(events), 'bgevent');
	},


	// Renders the basic HTML skeleton for the grid
	renderHtml: function() {
	return '' +
	'<div class="fc-bg">' +
	'<table>' +
	this.rowHtml('slotBg') + // leverages RowRenderer, which will call slotBgCellHtml
	'</table>' +
	'</div>' +
	'<div class="fc-slats">' +
	'<table>' +
	this.slatRowHtml() +
	'</table>' +
	'</div>';
	},


	// Renders the HTML for a vertical background cell behind the slots.
	// This method is distinct from 'bg' because we wanted a new `rowType` so the View could customize the rendering.
	slotBgCellHtml: function(cell) {
	return this.bgCellHtml(cell);
	},


	// Generates the HTML for the horizontal "slats" that run width-wise. Has a time axis on a side. Depends on RTL.
	slatRowHtml: 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); // after .time() will be in UTC. but that's good, avoids DST issues
	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 ' + (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.cellDuration = snapDuration; // for Grid system

	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 column header formatting string if `colFormat` is not explicitly defined
	computeColHeadFormat: function() {
	if (this.colCnt > 1) { // multiple days, so full single date string WON'T be in title text
	return this.view.opt('dayOfMonthFormat'); // "Sat 12/10"
	}
	else { // single day, so full single date string will probably be in title text
	return 'dddd'; // "Saturday"
	}
	},


	// 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;
	},


	/* Cell System
	------------------------------------------------------------------------------------------------------------------*/


	rangeUpdated: function() {
	var view = this.view;
	var colDates = [];
	var date;

	date = this.start.clone();
	while (date.isBefore(this.end)) {
	colDates.push(date.clone());
	date.add(1, 'day');
	date = view.skipHiddenDays(date);
	}

	if (this.isRTL) {
	colDates.reverse();
	}

	this.colDates = colDates;
	this.colCnt = colDates.length;
	this.rowCnt = Math.ceil((this.maxTime - this.minTime) / this.snapDuration); // # of vertical snaps
	},


	// Given a cell object, generates its start date. Returns a reference-free copy.
	computeCellDate: function(cell) {
	var date = this.colDates[cell.col];
	var time = this.computeSnapTime(cell.row);

	date = this.view.calendar.rezoneDate(date); // give it a 00:00 time
	date.time(time);

	return date;
	},


	// Retrieves the element representing the given column
	getColEl: function(col) {
	return this.dayEls.eq(col);
	},


	/* Dates
	------------------------------------------------------------------------------------------------------------------*/


	// Given a row number of the grid, representing a "snap", returns a time (Duration) from its start-of-day
	computeSnapTime: function(row) {
	return moment.duration(this.minTime + this.snapDuration * row);
	},


	// Slices up a date range by column into an array of segments
	rangeToSegs: function(range) {
	var colCnt = this.colCnt;
	var segs = [];
	var seg;
	var col;
	var colDate;
	var colRange;

	// normalize :(
	range = {
	start: range.start.clone().stripZone(),
	end: range.end.clone().stripZone()
	};

	for (col = 0; col < colCnt; col++) {
	colDate = this.colDates[col]; // will be ambig time/timezone
	colRange = {
	start: colDate.clone().time(this.minTime),
	end: colDate.clone().time(this.maxTime)
	};
	seg = intersectionToSeg(range, colRange); // both will be ambig timezone
	if (seg) {
	seg.col = col;
	segs.push(seg);
	}
	}

	return segs;
	},


	/* Coordinates
	------------------------------------------------------------------------------------------------------------------*/


	updateSize: function(isResize) { // NOT a standard Grid method
	this.computeSlatTops();

	if (isResize) {
	this.updateSegVerticals();
	}
	},


	// Computes the top/bottom coordinates of each "snap" rows
	computeRowCoords: function() {
	var originTop = this.el.offset().top;
	var items = [];
	var i;
	var item;

	for (i = 0; i < this.rowCnt; i++) {
	item = {
	top: originTop + this.computeTimeTop(this.computeSnapTime(i))
	};
	if (i > 0) {
	items[i - 1].bottom = item.top;
	}
	items.push(item);
	}
	item.bottom = item.top + this.computeTimeTop(this.computeSnapTime(i));

	return items;
	},


	// 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.clone().stripZone() - startOfDayDate.clone().stripTime()
	)
	);
	},


	// Computes the top coordinate, relative to the bounds of the grid, of the given time (a Duration).
	computeTimeTop: function(time) {
	var slatCoverage = (time - this.minTime) / this.slotDuration; // floating-point value of # of slots covered
	var slatIndex;
	var slatRemainder;
	var slatTop;
	var slatBottom;

	// constrain. because minTime/maxTime might be customized
	slatCoverage = Math.max(0, slatCoverage);
	slatCoverage = Math.min(this.slatEls.length, slatCoverage);

	slatIndex = Math.floor(slatCoverage); // an integer index of the furthest whole slot
	slatRemainder = slatCoverage - slatIndex;
	slatTop = this.slatTops[slatIndex]; // the top position of the furthest whole slot

	if (slatRemainder) { // time spans part-way into the slot
	slatBottom = this.slatTops[slatIndex + 1];
	return slatTop + (slatBottom - slatTop) * slatRemainder; // part-way between slots
	}
	else {
	return slatTop;
	}
	},


	// Queries each `slatEl` for its position relative to the grid's container and stores it in `slatTops`.
	// Includes the the bottom of the last slat as the last item in the array.
	computeSlatTops: function() {
	var tops = [];
	var top;

	this.slatEls.each(function(i, node) {
	top = $(node).position().top;
	tops.push(top);
	});

	tops.push(top + this.slatEls.last().outerHeight()); // bottom of the last slat

	this.slatTops = tops;
	},


	/* Event Drag Visualization
	------------------------------------------------------------------------------------------------------------------*/


	// Renders a visual indication of an event being dragged over the specified date(s).
	// dropLocation's end might be null, as well as `seg`. See Grid::renderDrag for more info.
	// A returned value of `true` signals that a mock "helper" event has been rendered.
	renderDrag: function(dropLocation, seg) {

	if (seg) { // if there is event information for this drag, render a helper event
	this.renderRangeHelper(dropLocation, seg);
	this.applyDragOpacity(this.helperEl);

	return true; // signal that a helper has been rendered
	}
	else {
	// otherwise, just render a highlight
	this.renderHighlight(this.eventRangeToSegs(dropLocation));
	}
	},


	// 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(range, seg) {
	this.renderRangeHelper(range, 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) {
	var segs = this.eventsToSegs([ event ]);
	var tableEl;
	var i, seg;
	var sourceEl;

	segs = this.renderFgSegEls(segs); // assigns each seg's el and returns a subset of segs that were rendered
	tableEl = this.renderSegTable(segs);

	// 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.helperEl = $('<div class="fc-helper-skeleton"/>')
	.append(tableEl)
	.appendTo(this.el);
	},


	// Unrenders any mock helper event
	unrenderHelper: function() {
	if (this.helperEl) {
	this.helperEl.remove();
	this.helperEl = null;
	}
	},


	/* Selection
	------------------------------------------------------------------------------------------------------------------*/


	// Renders a visual indication of a selection. Overrides the default, which was to simply render a highlight.
	renderSelection: function(range) {
	if (this.view.opt('selectHelper')) { // this setting signals that a mock helper event should be rendered
	this.renderRangeHelper(range);
	}
	else {
	this.renderHighlight(this.selectionRangeToSegs(range));
	}
	},


	// Unrenders any visual indication of a selection
	unrenderSelection: function() {
	this.unrenderHelper();
	this.unrenderHighlight();
	},


	/* Fill System (highlight, background events, business hours)
	------------------------------------------------------------------------------------------------------------------*/


	// Renders a set of rectangles over the given time segments.
	// Only returns segments that successfully rendered.
	renderFill: function(type, segs, className) {
	var segCols;
	var skeletonEl;
	var trEl;
	var col, colSegs;
	var tdEl;
	var containerEl;
	var dayDate;
	var i, seg;

	if (segs.length) {

	segs = this.renderFillSegEls(type, segs); // assignes `.el` to each seg. returns successfully rendered segs
	segCols = this.groupSegCols(segs); // group into sub-arrays, and assigns 'col' to each seg

	className = className \|\| type.toLowerCase();
	skeletonEl = $(
	'<div class="fc-' + className + '-skeleton">' +
	'<table><tr/></table>' +
	'</div>'
	);
	trEl = skeletonEl.find('tr');

	for (col = 0; col < segCols.length; col++) {
	colSegs = segCols[col];
	tdEl = $('<td/>').appendTo(trEl);

	if (colSegs.length) {
	containerEl = $('<div class="fc-' + className + '-container"/>').appendTo(tdEl);
	dayDate = this.colDates[col];

	for (i = 0; i < colSegs.length; i++) {
	seg = colSegs[i];
	containerEl.append(
	seg.el.css({
	top: this.computeDateTop(seg.start, dayDate),
	bottom: -this.computeDateTop(seg.end, dayDate) // the y position of the bottom edge
	})
	);
	}
	}
	}

	this.bookendCells(trEl, type);

	this.el.append(skeletonEl);
	this.elsByFill[type] = skeletonEl;
	}

	return segs;
	}

	});

	;;

	/* Event-rendering methods for the TimeGrid class
	----------------------------------------------------------------------------------------------------------------------*/

	TimeGrid.mixin({

	eventSkeletonEl: null, // has cells with event-containers, which contain absolutely positioned event elements


	// Renders the given foreground event segments onto the grid
	renderFgSegs: function(segs) {
	segs = this.renderFgSegEls(segs); // returns a subset of the segs. segs that were actually rendered

	this.el.append(
	this.eventSkeletonEl = $('<div class="fc-content-skeleton"/>')
	.append(this.renderSegTable(segs))
	);

	return segs; // return only the segs that were actually rendered
	},


	// Unrenders all currently rendered foreground event segments
	unrenderFgSegs: function(segs) {
	if (this.eventSkeletonEl) {
	this.eventSkeletonEl.remove();
	this.eventSkeletonEl = null;
	}
	},


	// Renders and returns the <table> portion of the event-skeleton.
	// Returns an object with properties 'tbodyEl' and 'segs'.
	renderSegTable: function(segs) {
	var tableEl = $('<table><tr/></table>');
	var trEl = tableEl.find('tr');
	var segCols;
	var i, seg;
	var col, colSegs;
	var containerEl;

	segCols = this.groupSegCols(segs); // group into sub-arrays, and assigns 'col' to each seg

	this.computeSegVerticals(segs); // compute and assign top/bottom

	for (col = 0; col < segCols.length; col++) { // iterate each column grouping
	colSegs = segCols[col];
	this.placeSlotSegs(colSegs); // compute horizontal coordinates, z-index's, and reorder the array

	containerEl = $('<div class="fc-event-container"/>');

	// assign positioning CSS and insert into container
	for (i = 0; i < colSegs.length; i++) {
	seg = colSegs[i];
	seg.el.css(this.generateSegPositionCss(seg));

	// if the height is short, add a className for alternate styling
	if (seg.bottom - seg.top < 30) {
	seg.el.addClass('fc-short');
	}

	containerEl.append(seg.el);
	}

	trEl.append($('<td/>').append(containerEl));
	}

	this.bookendCells(trEl, 'eventSkeleton');

	return tableEl;
	},


	// 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!
	placeSlotSegs: function(segs) {
	var levels;
	var level0;
	var i;

	this.sortSegs(segs); // order by date
	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.computeSlotSegCoords(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.
	computeSlotSegCoords: 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.sortForwardSlotSegs(forwardSegs);

	// this segment's forwardCoord will be calculated from the backwardCoord of the
	// highest-pressure forward segment.
	this.computeSlotSegCoords(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.computeSlotSegCoords(forwardSegs[i], 0, seg.forwardCoord);
	}
	}
	},


	// Refreshes the CSS top/bottom coordinates for each segment element. Probably after a window resize/zoom.
	// Repositions business hours segs too, so not just for events. Maybe shouldn't be here.
	updateSegVerticals: function() {
	var allSegs = (this.segs \|\| []).concat(this.businessHourSegs \|\| []);
	var i;

	this.computeSegVerticals(allSegs);

	for (i = 0; i < allSegs.length; i++) {
	allSegs[i].el.css(
	this.generateSegVerticalCss(allSegs[i])
	);
	}
	},


	// 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);
	}
	},


	// 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>';
	},


	// 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.
	generateSegPositionCss: 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;
	},


	// 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
	};
	},


	// Given a flat array of segments, return an array of sub-arrays, grouped by each segment's col
	groupSegCols: function(segs) {
	var segCols = [];
	var i;

	for (i = 0; i < this.colCnt; i++) {
	segCols.push([]);
	}

	for (i = 0; i < segs.length; i++) {
	segCols[segs[i].col].push(segs[i]);
	}

	return segCols;
	},


	sortForwardSlotSegs: function(forwardSegs) {
	forwardSegs.sort(proxy(this, 'compareForwardSlotSegs'));
	},


	// A cmp function for determining which forward segment to rely on more when computing coordinates.
	compareForwardSlotSegs: 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.compareSegs(seg1, seg2);
	}

	});


	// 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
	coordMap: null, // a CoordMap object for converting pixel regions to dates
	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


	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 date
	setDate: function(date) {
	this.setRange(this.computeRange(date));
	},


	// Updates all internal dates for displaying the given range.
	// Expects all values to be normalized (like what computeRange does).
	setRange: function(range) {
	$.extend(this, range);
	this.updateTitle();
	},


	// Given a single current 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.rezoneDate(intervalStart); // convert to current timezone, with 00:00
	}
	if (!intervalEnd.hasTime()) {
	intervalEnd = this.calendar.rezoneDate(intervalEnd); // convert to current timezone, with 00:00
	}
	}

	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(
	{ start: this.intervalStart, end: 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.
	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 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();
	}

	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.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
	}
	},


	// 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;
	}
	this.setDate(date);
	if (this.render) {
	this.render(); // TODO: deprecate
	}
	this.renderDates();
	this.updateSize();
	this.renderBusinessHours(); // might need coordinates, so should go after updateSize()
	},


	// Unrenders the view content that was rendered in displayView.
	// Can be asynchronous and return a promise.
	clearView: function() {
	this.unselect();
	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 (like cells that represent days/times).
	// 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
	},


	// 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
	},


	// 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';
	},


	/* 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() {
	if (this.isEventsRendered) {
	this.triggerEventUnrender();
	if (this.destroyEvents) {
	this.destroyEvents(); // TODO: deprecate
	}
	this.unrenderEvents();
	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 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 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 range on the view. `start` and `end` are both Moments.
	// `ev` is the native mouse event that begin the interaction.
	select: function(range, ev) {
	this.unselect(ev);
	this.renderSelection(range);
	this.reportSelection(range, ev);
	},


	// Renders a visual indication of the selection
	renderSelection: function(range) {
	// subclasses should implement
	},


	// Called when a new selection is made. Updates internal state and triggers handlers.
	reportSelection: function(range, ev) {
	this.isSelected = true;
	this.triggerSelect(range, ev);
	},


	// Triggers handlers to 'select'
	triggerSelect: function(range, ev) {
	this.trigger('select', null, range.start, range.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'
	triggerDayClick: function(cell, dayEl, ev) {
	this.trigger('dayClick', dayEl, cell.start, 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 range
	buildSelectRange: function(start, end) {

	start = this.moment(start);
	if (end) {
	end = this.moment(end);
	}
	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 of it is ambiguously zoned.
	// This will also give the date an unambiguous time.
	t.rezoneDate = function(date) {
	return t.moment(date.toArray());
	};


	// Returns a moment for the current date, as defined by the client's computer,
	// or overridden by the `now` option.
	t.getNow = function() {
	var now = options.now;
	if (typeof now === 'function') {
	now = now();
	}
	return t.moment(now);
	};


	// 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 swhat its fallback end date should be.
	t.getDefaultEventEnd = function(allDay, start) { // TODO: rename to computeDefaultEventEnd
	var end = start.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 date;
	var events = [];



	// Main Rendering
	// -----------------------------------------------------------------------------------


	if (options.defaultDate != null) {
	date = t.moment(options.defaultDate);
	}
	else {
	date = t.getNow();
	}


	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()) {

	freezeContentHeight();
	currentView.display(date);
	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
	-----------------------------------------------------------------------------*/


	function select(start, end) {
	currentView.select(
	t.buildSelectRange.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(dateInput) {
	date = t.moment(dateInput);
	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;
	renderView(spec ? spec.type : null);
	}


	function getDate() {
	return date.clone();
	}



	/* Height "Freezing"
	-----------------------------------------------------------------------------*/
	// TODO: move this into the view


	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,

	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)
	var instanceComputableOptions = { // TODO: best place for this? related to lang?

	// 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> </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.normalizeEventRange = normalizeEventRange;
	t.normalizeEventRangeTimes = normalizeEventRangeTimes;
	t.ensureVisibleEventRange = ensureVisibleEventRange;


	// 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
	-----------------------------------------------------------------------------*/


	function isFetchNeeded(start, end) {
	return !rangeStart \|\| // nothing has been fetched yet?
	// or, a part of the new range is outside of the old range? (after normalizing)
	start.clone().stripZone() < rangeStart.clone().stripZone() \|\|
	end.clone().stripZone() > rangeEnd.clone().stripZone();
	}


	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? normalizeEventRange 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;
	normalizeEventRange(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 normalizeEventRange(props) {

	normalizeEventRangeTimes(props);

	if (props.end && !props.end.isAfter(props.start)) {
	props.end = null;
	}

	if (!props.end) {
	if (options.forceEventDuration) {
	props.end = t.getDefaultEventEnd(props.allDay, props.start);
	}
	else {
	props.end = null;
	}
	}
	}


	// Ensures the allDay property exists and the timeliness of the start/end dates are consistent
	function normalizeEventRangeTimes(range) {
	if (range.allDay == null) {
	range.allDay = !(range.start.hasTime() \|\| (range.end && range.end.hasTime()));
	}

	if (range.allDay) {
	range.start.stripTime();
	if (range.end) {
	// TODO: consider nextDayThreshold here? If so, will require a lot of testing and adjustment
	range.end.stripTime();
	}
	}
	else {
	if (!range.start.hasTime()) {
	range.start = t.rezoneDate(range.start); // will assign a 00:00 time
	}
	if (range.end && !range.end.hasTime()) {
	range.end = t.rezoneDate(range.end); // will assign a 00:00 time
	}
	}
	}


	// If `range` is a proper range with a start and end, returns the original object.
	// If missing an end, computes a new range with an end, computing it as if it were an event.
	// TODO: make this a part of the event -> eventRange system
	function ensureVisibleEventRange(range) {
	var allDay;

	if (!range.end) {

	allDay = range.allDay; // range might be more event-ish than we think
	if (allDay == null) {
	allDay = !range.start.hasTime();
	}

	range = $.extend({}, range); // make a copy, copying over other misc properties
	range.end = t.getDefaultEventEnd(allDay, range.start);
	}
	return range;
	}


	// 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;
	}
	normalizeEventRange(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
	};
	normalizeEventRange(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
	};
	normalizeEventRange(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.isEventRangeAllowed = isEventRangeAllowed;
	t.isSelectionRangeAllowed = isSelectionRangeAllowed;
	t.isExternalDropRangeAllowed = isExternalDropRangeAllowed;


	function isEventRangeAllowed(range, event) {
	var source = event.source \|\| {};
	var constraint = firstDefined(
	event.constraint,
	source.constraint,
	options.eventConstraint
	);
	var overlap = firstDefined(
	event.overlap,
	source.overlap,
	options.eventOverlap
	);

	range = ensureVisibleEventRange(range); // ensure a proper range with an end for isRangeAllowed

	return isRangeAllowed(range, constraint, overlap, event);
	}


	function isSelectionRangeAllowed(range) {
	return isRangeAllowed(range, options.selectConstraint, options.selectOverlap);
	}


	// when `eventProps` is defined, consider this an event.
	// `eventProps` can contain misc non-date-related info about the event.
	function isExternalDropRangeAllowed(range, eventProps) {
	var eventInput;
	var event;

	// note: very similar logic is in View's reportExternalDrop
	if (eventProps) {
	eventInput = $.extend({}, eventProps, range);
	event = expandEvent(buildEventFromInput(eventInput))[0];
	}

	if (event) {
	return isEventRangeAllowed(range, event);
	}
	else { // treat it as a selection

	range = ensureVisibleEventRange(range); // ensure a proper range with an end for isSelectionRangeAllowed

	return isSelectionRangeAllowed(range);
	}
	}


	// Returns true if the given range (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 isRangeAllowed(range, constraint, overlap, event) {
	var constraintEvents;
	var anyContainment;
	var peerEvents;
	var i, peerEvent;
	var peerOverlap;

	// normalize. fyi, we're normalizing in too many places :(
	range = $.extend({}, range); // copy all properties in case there are misc non-date properties
	range.start = range.start.clone().stripZone();
	range.end = range.end.clone().stripZone();

	// 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], range)) {
	anyContainment = true;
	break;
	}
	}

	if (!anyContainment) {
	return false;
	}
	}

	peerEvents = t.getPeerEvents(event, range);

	for (i = 0; i < peerEvents.length; i++) {
	peerEvent = peerEvents[i];

	// there needs to be an actual intersection before disallowing anything
	if (eventIntersectsRange(peerEvent, range)) {

	// 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 range. Attached to the Calendar's prototype because EventManager is a mixin for a Calendar.
	Calendar.prototype.getPeerEvents = function(event, range) {
	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 = View.extend({

	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

	headRowEl: null, // the fake row element of the day-of-week header


	initialize: function() {
	this.dayGrid = new DayGrid(this);
	this.coordMap = this.dayGrid.coordMap; // the view's date-to-cell mapping is identical to the subcomponent's
	},


	// 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.renderHtml());

	this.headRowEl = this.el.find('thead .fc-row');

	this.scrollerEl = this.el.find('.fc-day-grid-container');
	this.dayGrid.coordMap.containerEl = this.scrollerEl; // constrain clicks/etc to the dimensions of the scroller

	this.dayGrid.setElement(this.el.find('.fc-day-grid'));
	this.dayGrid.renderDates(this.hasRigidRows());
	},


	// 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.
	renderHtml: function() {
	return '' +
	'<table>' +
	'<thead class="fc-head">' +
	'<tr>' +
	'<td class="' + this.widgetHeaderClass + '">' +
	this.dayGrid.headHtml() + // render the day-of-week headers
	'</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 the HTML that will go before the day-of week header cells.
	// Queried by the DayGrid subcomponent when generating rows. Ordering depends on isRTL.
	headIntroHtml: function() {
	if (this.weekNumbersVisible) {
	return '' +
	'<th class="fc-week-number ' + this.widgetHeaderClass + '" ' + this.weekNumberStyleAttr() + '>' +
	'<span>' + // needed for matchCellWidths
	htmlEscape(this.opt('weekNumberTitle')) +
	'</span>' +
	'</th>';
	}
	},


	// Generates the HTML that will go before content-skeleton cells that display the day/week numbers.
	// Queried by the DayGrid subcomponent. Ordering depends on isRTL.
	numberIntroHtml: function(row) {
	if (this.weekNumbersVisible) {
	return '' +
	'<td class="fc-week-number" ' + this.weekNumberStyleAttr() + '>' +
	'<span>' + // needed for matchCellWidths
	this.dayGrid.getCell(row, 0).start.format('w') +
	'</span>' +
	'</td>';
	}
	},


	// Generates the HTML that goes before the day bg cells for each day-row.
	// Queried by the DayGrid subcomponent. Ordering depends on isRTL.
	dayIntroHtml: function() {
	if (this.weekNumbersVisible) {
	return '<td class="fc-week-number ' + this.widgetContentClass + '" ' +
	this.weekNumberStyleAttr() + '></td>';
	}
	},


	// Generates the HTML that goes before every other type of row generated by DayGrid. Ordering depends on isRTL.
	// Affects helper-skeleton and highlight-skeleton rows.
	introHtml: function() {
	if (this.weekNumbersVisible) {
	return '<td class="fc-week-number" ' + this.weekNumberStyleAttr() + '></td>';
	}
	},


	// 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.
	numberCellHtml: function(cell) {
	var date = cell.start;
	var classes;

	if (!this.dayNumbersVisible) { // if there are week numbers but not day numbers
	return '<td/>'; // will create an empty space above events :(
	}

	classes = this.dayGrid.getDayClasses(date);
	classes.unshift('fc-day-number');

	return '' +
	'<td class="' + classes.join(' ') + '" data-date="' + date.format() + '">' +
	date.date() +
	'</td>';
	},


	// 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
	}
	},


	/* 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(range) {
	this.dayGrid.renderSelection(range);
	},


	// Unrenders a visual indications of a selection
	unrenderSelection: function() {
	this.dayGrid.unrenderSelection();
	}

	});

	;;

	/* A month view with day cells running in rows (one-per-week) and columns
	----------------------------------------------------------------------------------------------------------------------*/

	var 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 = View.extend({

	timeGrid: null, // the main time-grid subcomponent of this view
	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

	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 = new TimeGrid(this);

	if (this.opt('allDaySlot')) { // should we display the "all-day" area?
	this.dayGrid = new DayGrid(this); // the all-day subcomponent of this view

	// the coordinate grid will be a combination of both subcomponents' grids
	this.coordMap = new ComboCoordMap([
	this.dayGrid.coordMap,
	this.timeGrid.coordMap
	]);
	}
	else {
	this.coordMap = this.timeGrid.coordMap;
	}
	},


	/* 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.renderHtml());

	// the element that wraps the time-grid that will probably scroll
	this.scrollerEl = this.el.find('.fc-time-grid-container');
	this.timeGrid.coordMap.containerEl = this.scrollerEl; // don't accept clicks/etc outside of this

	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
	},


	// 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();
	}
	},


	renderBusinessHours: function() {
	this.timeGrid.renderBusinessHours();

	if (this.dayGrid) {
	this.dayGrid.renderBusinessHours();
	}
	},


	// Builds the HTML skeleton for the view.
	// The day-grid and time-grid components will render inside containers defined by this HTML.
	renderHtml: function() {
	return '' +
	'<table>' +
	'<thead class="fc-head">' +
	'<tr>' +
	'<td class="' + this.widgetHeaderClass + '">' +
	this.timeGrid.headHtml() + // render the day-of-week headers
	'</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 the HTML that will go before the day-of week header cells.
	// Queried by the TimeGrid subcomponent when generating rows. Ordering depends on isRTL.
	headIntroHtml: function() {
	var date;
	var weekText;

	if (this.opt('weekNumbers')) {
	date = this.timeGrid.getCell(0).start;
	weekText = date.format(this.opt('smallWeekFormat'));

	return '' +
	'<th class="fc-axis fc-week-number ' + this.widgetHeaderClass + '" ' + this.axisStyleAttr() + '>' +
	'<span>' + // needed for matchCellWidths
	htmlEscape(weekText) +
	'</span>' +
	'</th>';
	}
	else {
	return '<th class="fc-axis ' + this.widgetHeaderClass + '" ' + this.axisStyleAttr() + '></th>';
	}
	},


	// Generates the HTML that goes before the all-day cells.
	// Queried by the DayGrid subcomponent when generating rows. Ordering depends on isRTL.
	dayIntroHtml: function() {
	return '' +
	'<td class="fc-axis ' + this.widgetContentClass + '" ' + this.axisStyleAttr() + '>' +
	'<span>' + // needed for matchCellWidths
	(this.opt('allDayHtml') \|\| htmlEscape(this.opt('allDayText'))) +
	'</span>' +
	'</td>';
	},


	// Generates the HTML that goes before the bg of the TimeGrid slot area. Long vertical column.
	slotBgIntroHtml: function() {
	return '<td class="fc-axis ' + this.widgetContentClass + '" ' + this.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.
	// Queried by the TimeGrid and DayGrid subcomponents when generating rows. Ordering depends on isRTL.
	introHtml: function() {
	return '<td class="fc-axis" ' + this.axisStyleAttr() + '></td>';
	},


	// 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 '';
	},


	/* 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;
	},


	/* 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(range) {
	if (range.start.hasTime() \|\| range.end.hasTime()) {
	this.timeGrid.renderSelection(range);
	}
	else if (this.dayGrid) {
	this.dayGrid.renderSelection(range);
	}
	},


	// Unrenders a visual indications of a selection
	unrenderSelection: function() {
	this.timeGrid.unrenderSelection();
	if (this.dayGrid) {
	this.dayGrid.unrenderSelection();
	}
	}

	});

	;;

	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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