themes-wordpress/pique/assets/js/jquery.waypoints.js

/*!
Waypoints - 3.1.1
Copyright © 2011-2015 Caleb Troughton
Licensed under the MIT license.
https://github.com/imakewebthings/waypoints/blog/master/licenses.txt
*/
(function() {
	'use strict'

	var keyCounter = 0
	var allWaypoints = {}

	/* http://imakewebthings.com/waypoints/api/waypoint */
	function Waypoint(options) {
		if ( ! options) {
			throw new Error( 'No options passed to Waypoint constructor' )
		}
		if ( ! options.element) {
			throw new Error( 'No element option passed to Waypoint constructor' )
		}
		if ( ! options.handler) {
			throw new Error( 'No handler option passed to Waypoint constructor' )
		}

		this.key = 'waypoint-' + keyCounter
		this.options = Waypoint.Adapter.extend( {}, Waypoint.defaults, options )
		this.element = this.options.element
		this.adapter = new Waypoint.Adapter( this.element )
		this.callback = options.handler
		this.axis = this.options.horizontal ? 'horizontal' : 'vertical'
		this.enabled = this.options.enabled
		this.triggerPoint = null
		this.group = Waypoint.Group.findOrCreate({
			name: this.options.group,
			axis: this.axis
		})
		this.context = Waypoint.Context.findOrCreateByElement( this.options.context )

		if (Waypoint.offsetAliases[this.options.offset]) {
			this.options.offset = Waypoint.offsetAliases[this.options.offset]
		}
		this.group.add( this )
		this.context.add( this )
		allWaypoints[this.key] = this
		keyCounter += 1
	}

	/* Private */
	Waypoint.prototype.queueTrigger = function(direction) {
		this.group.queueTrigger( this, direction )
	}

	/* Private */
	Waypoint.prototype.trigger = function(args) {
		if ( ! this.enabled) {
			return
		}
		if (this.callback) {
			this.callback.apply( this, args )
		}
	}

	/* Public */
	/* http://imakewebthings.com/waypoints/api/destroy */
	Waypoint.prototype.destroy = function() {
		this.context.remove( this )
		this.group.remove( this )
		delete allWaypoints[this.key]
	}

	/* Public */
	/* http://imakewebthings.com/waypoints/api/disable */
	Waypoint.prototype.disable = function() {
		this.enabled = false
		return this
	}

	/* Public */
	/* http://imakewebthings.com/waypoints/api/enable */
	Waypoint.prototype.enable = function() {
		this.context.refresh()
		this.enabled = true
		return this
	}

	/* Public */
	/* http://imakewebthings.com/waypoints/api/next */
	Waypoint.prototype.next = function() {
		return this.group.next( this )
	}

	/* Public */
	/* http://imakewebthings.com/waypoints/api/previous */
	Waypoint.prototype.previous = function() {
		return this.group.previous( this )
	}

	/* Private */
	Waypoint.invokeAll = function(method) {
		var allWaypointsArray = []
		for (var waypointKey in allWaypoints) {
			allWaypointsArray.push( allWaypoints[waypointKey] )
		}
		for (var i = 0, end = allWaypointsArray.length; i < end; i++) {
			allWaypointsArray[i][method]()
		}
	}

	/* Public */
	/* http://imakewebthings.com/waypoints/api/destroy-all */
	Waypoint.destroyAll = function() {
		Waypoint.invokeAll( 'destroy' )
	}

	/* Public */
	/* http://imakewebthings.com/waypoints/api/disable-all */
	Waypoint.disableAll = function() {
		Waypoint.invokeAll( 'disable' )
	}

	/* Public */
	/* http://imakewebthings.com/waypoints/api/enable-all */
	Waypoint.enableAll = function() {
		Waypoint.invokeAll( 'enable' )
	}

	/* Public */
	/* http://imakewebthings.com/waypoints/api/refresh-all */
	Waypoint.refreshAll = function() {
		Waypoint.Context.refreshAll()
	}

	/* Public */
	/* http://imakewebthings.com/waypoints/api/viewport-height */
	Waypoint.viewportHeight = function() {
		return window.innerHeight || document.documentElement.clientHeight
	}

	/* Public */
	/* http://imakewebthings.com/waypoints/api/viewport-width */
	Waypoint.viewportWidth = function() {
		return document.documentElement.clientWidth
	}

	Waypoint.adapters = []

	Waypoint.defaults = {
		context: window,
		continuous: true,
		enabled: true,
		group: 'default',
		horizontal: false,
		offset: 0
	}

	Waypoint.offsetAliases = {
		'bottom-in-view': function() {
			return this.context.innerHeight() - this.adapter.outerHeight()
		},
		'right-in-view': function() {
			return this.context.innerWidth() - this.adapter.outerWidth()
		}
	}

	window.Waypoint = Waypoint
}())
;(function() {
	'use strict'

	function requestAnimationFrameShim(callback) {
		window.setTimeout( callback, 1000 / 60 )
	}

	var keyCounter = 0
	var contexts = {}
	var Waypoint = window.Waypoint
	var oldWindowLoad = window.onload

	/* http://imakewebthings.com/waypoints/api/context */
	function Context(element) {
		this.element = element
		this.Adapter = Waypoint.Adapter
		this.adapter = new this.Adapter( element )
		this.key = 'waypoint-context-' + keyCounter
		this.didScroll = false
		this.didResize = false
		this.oldScroll = {
			x: this.adapter.scrollLeft(),
			y: this.adapter.scrollTop()
		}
		this.waypoints = {
			vertical: {},
			horizontal: {}
		}

		element.waypointContextKey = this.key
		contexts[element.waypointContextKey] = this
		keyCounter += 1

		this.createThrottledScrollHandler()
		this.createThrottledResizeHandler()
	}

	/* Private */
	Context.prototype.add = function(waypoint) {
		var axis = waypoint.options.horizontal ? 'horizontal' : 'vertical'
		this.waypoints[axis][waypoint.key] = waypoint
		this.refresh()
	}

	/* Private */
	Context.prototype.checkEmpty = function() {
		var horizontalEmpty = this.Adapter.isEmptyObject( this.waypoints.horizontal )
		var verticalEmpty = this.Adapter.isEmptyObject( this.waypoints.vertical )
		if (horizontalEmpty && verticalEmpty) {
			this.adapter.off( '.waypoints' )
			delete contexts[this.key]
		}
	}

	/* Private */
	Context.prototype.createThrottledResizeHandler = function() {
		var self = this

		function resizeHandler() {
			self.handleResize()
			self.didResize = false
		}

		this.adapter.on('resize.waypoints', function() {
			if ( ! self.didResize) {
				self.didResize = true
				Waypoint.requestAnimationFrame( resizeHandler )
			}
		})
	}

	/* Private */
	Context.prototype.createThrottledScrollHandler = function() {
		var self = this
		function scrollHandler() {
			self.handleScroll()
			self.didScroll = false
		}

		this.adapter.on('scroll.waypoints', function() {
			if ( ! self.didScroll || Waypoint.isTouch) {
				self.didScroll = true
				Waypoint.requestAnimationFrame( scrollHandler )
			}
		})
	}

	/* Private */
	Context.prototype.handleResize = function() {
		Waypoint.Context.refreshAll()
	}

	/* Private */
	Context.prototype.handleScroll = function() {
		var triggeredGroups = {}
		var axes = {
			horizontal: {
				newScroll: this.adapter.scrollLeft(),
				oldScroll: this.oldScroll.x,
				forward: 'right',
				backward: 'left'
			},
			vertical: {
				newScroll: this.adapter.scrollTop(),
				oldScroll: this.oldScroll.y,
				forward: 'down',
				backward: 'up'
			}
		}

		for (var axisKey in axes) {
			var axis = axes[axisKey]
			var isForward = axis.newScroll > axis.oldScroll
			var direction = isForward ? axis.forward : axis.backward

			for (var waypointKey in this.waypoints[axisKey]) {
				var waypoint = this.waypoints[axisKey][waypointKey]
				var wasBeforeTriggerPoint = axis.oldScroll < waypoint.triggerPoint
				var nowAfterTriggerPoint = axis.newScroll >= waypoint.triggerPoint
				var crossedForward = wasBeforeTriggerPoint && nowAfterTriggerPoint
				var crossedBackward = ! wasBeforeTriggerPoint && ! nowAfterTriggerPoint
				if (crossedForward || crossedBackward) {
					waypoint.queueTrigger( direction )
					triggeredGroups[waypoint.group.id] = waypoint.group
				}
			}
		}

		for (var groupKey in triggeredGroups) {
			triggeredGroups[groupKey].flushTriggers()
		}

		this.oldScroll = {
			x: axes.horizontal.newScroll,
			y: axes.vertical.newScroll
		}
	}

	/* Private */
	Context.prototype.innerHeight = function() {
		/*eslint-disable eqeqeq */
		if (this.element == this.element.window) {
			return Waypoint.viewportHeight()
		}
		/*eslint-enable eqeqeq */
		return this.adapter.innerHeight()
	}

	/* Private */
	Context.prototype.remove = function(waypoint) {
		delete this.waypoints[waypoint.axis][waypoint.key]
		this.checkEmpty()
	}

	/* Private */
	Context.prototype.innerWidth = function() {
		/*eslint-disable eqeqeq */
		if (this.element == this.element.window) {
			return Waypoint.viewportWidth()
		}
		/*eslint-enable eqeqeq */
		return this.adapter.innerWidth()
	}

	/* Public */
	/* http://imakewebthings.com/waypoints/api/context-destroy */
	Context.prototype.destroy = function() {
		var allWaypoints = []
		for (var axis in this.waypoints) {
			for (var waypointKey in this.waypoints[axis]) {
				allWaypoints.push( this.waypoints[axis][waypointKey] )
			}
		}
		for (var i = 0, end = allWaypoints.length; i < end; i++) {
			allWaypoints[i].destroy()
		}
	}

	/* Public */
	/* http://imakewebthings.com/waypoints/api/context-refresh */
	Context.prototype.refresh = function() {
		/*eslint-disable eqeqeq */
		var isWindow = this.element == this.element.window
		/*eslint-enable eqeqeq */
		var contextOffset = this.adapter.offset()
		var triggeredGroups = {}
		var axes

		this.handleScroll()
		axes = {
			horizontal: {
				contextOffset: isWindow ? 0 : contextOffset.left,
				contextScroll: isWindow ? 0 : this.oldScroll.x,
				contextDimension: this.innerWidth(),
				oldScroll: this.oldScroll.x,
				forward: 'right',
				backward: 'left',
				offsetProp: 'left'
			},
			vertical: {
				contextOffset: isWindow ? 0 : contextOffset.top,
				contextScroll: isWindow ? 0 : this.oldScroll.y,
				contextDimension: this.innerHeight(),
				oldScroll: this.oldScroll.y,
				forward: 'down',
				backward: 'up',
				offsetProp: 'top'
			}
		}

		for (var axisKey in axes) {
			var axis = axes[axisKey]
			for (var waypointKey in this.waypoints[axisKey]) {
				var waypoint = this.waypoints[axisKey][waypointKey]
				var adjustment = waypoint.options.offset
				var oldTriggerPoint = waypoint.triggerPoint
				var elementOffset = 0
				var freshWaypoint = oldTriggerPoint == null
				var contextModifier, wasBeforeScroll, nowAfterScroll
				var triggeredBackward, triggeredForward

				if (waypoint.element !== waypoint.element.window) {
					elementOffset = waypoint.adapter.offset()[axis.offsetProp]
				}

				if (typeof adjustment === 'function') {
					adjustment = adjustment.apply( waypoint )
				} else if (typeof adjustment === 'string') {
					adjustment = parseFloat( adjustment )
					if (waypoint.options.offset.indexOf( '%' ) > - 1) {
						adjustment = Math.ceil( axis.contextDimension * adjustment / 100 )
					}
				}

				contextModifier = axis.contextScroll - axis.contextOffset
				waypoint.triggerPoint = elementOffset + contextModifier - adjustment
				wasBeforeScroll = oldTriggerPoint < axis.oldScroll
				nowAfterScroll = waypoint.triggerPoint >= axis.oldScroll
				triggeredBackward = wasBeforeScroll && nowAfterScroll
				triggeredForward = ! wasBeforeScroll && ! nowAfterScroll

				if ( ! freshWaypoint && triggeredBackward) {
					waypoint.queueTrigger( axis.backward )
					triggeredGroups[waypoint.group.id] = waypoint.group
				} else if ( ! freshWaypoint && triggeredForward) {
					waypoint.queueTrigger( axis.forward )
					triggeredGroups[waypoint.group.id] = waypoint.group
				} else if (freshWaypoint && axis.oldScroll >= waypoint.triggerPoint) {
					waypoint.queueTrigger( axis.forward )
					triggeredGroups[waypoint.group.id] = waypoint.group
				}
			}
		}

		for (var groupKey in triggeredGroups) {
			triggeredGroups[groupKey].flushTriggers()
		}

		return this
	}

	/* Private */
	Context.findOrCreateByElement = function(element) {
		return Context.findByElement( element ) || new Context( element )
	}

	/* Private */
	Context.refreshAll = function() {
		for (var contextId in contexts) {
			contexts[contextId].refresh()
		}
	}

	/* Public */
	/* http://imakewebthings.com/waypoints/api/context-find-by-element */
	Context.findByElement = function(element) {
		return contexts[element.waypointContextKey]
	}

	window.onload = function() {
		if (oldWindowLoad) {
			oldWindowLoad()
		}
		Context.refreshAll()
	}

	Waypoint.requestAnimationFrame = function(callback) {
		var requestFn = window.requestAnimationFrame ||
		window.mozRequestAnimationFrame ||
		window.webkitRequestAnimationFrame ||
		requestAnimationFrameShim
		requestFn.call( window, callback )
	}
	Waypoint.Context = Context
}())
;(function() {
	'use strict'

	function byTriggerPoint(a, b) {
		return a.triggerPoint - b.triggerPoint
	}

	function byReverseTriggerPoint(a, b) {
		return b.triggerPoint - a.triggerPoint
	}

	var groups = {
		vertical: {},
		horizontal: {}
	}
	var Waypoint = window.Waypoint

	/* http://imakewebthings.com/waypoints/api/group */
	function Group(options) {
		this.name = options.name
		this.axis = options.axis
		this.id = this.name + '-' + this.axis
		this.waypoints = []
		this.clearTriggerQueues()
		groups[this.axis][this.name] = this
	}

	/* Private */
	Group.prototype.add = function(waypoint) {
		this.waypoints.push( waypoint )
	}

	/* Private */
	Group.prototype.clearTriggerQueues = function() {
		this.triggerQueues = {
			up: [],
			down: [],
			left: [],
			right: []
		}
	}

	/* Private */
	Group.prototype.flushTriggers = function() {
		for (var direction in this.triggerQueues) {
			var waypoints = this.triggerQueues[direction]
			var reverse = direction === 'up' || direction === 'left'
			waypoints.sort( reverse ? byReverseTriggerPoint : byTriggerPoint )
			for (var i = 0, end = waypoints.length; i < end; i += 1) {
				var waypoint = waypoints[i]
				if (waypoint.options.continuous || i === waypoints.length - 1) {
					waypoint.trigger( [direction] )
				}
			}
		}
		this.clearTriggerQueues()
	}

	/* Private */
	Group.prototype.next = function(waypoint) {
		this.waypoints.sort( byTriggerPoint )
		var index = Waypoint.Adapter.inArray( waypoint, this.waypoints )
		var isLast = index === this.waypoints.length - 1
		return isLast ? null : this.waypoints[index + 1]
	}

	/* Private */
	Group.prototype.previous = function(waypoint) {
		this.waypoints.sort( byTriggerPoint )
		var index = Waypoint.Adapter.inArray( waypoint, this.waypoints )
		return index ? this.waypoints[index - 1] : null
	}

	/* Private */
	Group.prototype.queueTrigger = function(waypoint, direction) {
		this.triggerQueues[direction].push( waypoint )
	}

	/* Private */
	Group.prototype.remove = function(waypoint) {
		var index = Waypoint.Adapter.inArray( waypoint, this.waypoints )
		if (index > -1) {
			this.waypoints.splice( index, 1 )
		}
	}

	/* Public */
	/* http://imakewebthings.com/waypoints/api/first */
	Group.prototype.first = function() {
		return this.waypoints[0]
	}

	/* Public */
	/* http://imakewebthings.com/waypoints/api/last */
	Group.prototype.last = function() {
		return this.waypoints[this.waypoints.length - 1]
	}

	/* Private */
	Group.findOrCreate = function(options) {
		return groups[options.axis][options.name] || new Group( options )
	}

	Waypoint.Group = Group
}())
;(function() {
	'use strict'

	var $ = window.jQuery
	var Waypoint = window.Waypoint

	function JQueryAdapter(element) {
		this.$element = $( element )
	}

	$.each([
		'innerHeight',
		'innerWidth',
		'off',
		'offset',
		'on',
		'outerHeight',
		'outerWidth',
		'scrollLeft',
		'scrollTop'
		], function(i, method) {
			JQueryAdapter.prototype[method] = function() {
				var args = Array.prototype.slice.call( arguments )
				return this.$element[method].apply( this.$element, args )
			}
		})

	$.each([
		'extend',
		'inArray',
		'isEmptyObject'
		], function(i, method) {
			JQueryAdapter[method] = $[method]
		})

	Waypoint.adapters.push({
		name: 'jquery',
		Adapter: JQueryAdapter
	})
	Waypoint.Adapter = JQueryAdapter
}())
;(function() {
	'use strict'

	var Waypoint = window.Waypoint

	function createExtension(framework) {
		return function() {
			var waypoints = []
			var overrides = arguments[0]

			if (framework.isFunction( arguments[0] )) {
				overrides = framework.extend( {}, arguments[1] )
				overrides.handler = arguments[0]
			}

			this.each(function() {
				var options = framework.extend({}, overrides, {
					element: this
				})
				if (typeof options.context === 'string') {
					options.context = framework( this ).closest( options.context )[0]
				}
				waypoints.push( new Waypoint( options ) )
			})

			return waypoints
		}
	}

	if (window.jQuery) {
		window.jQuery.fn.waypoint = createExtension( window.jQuery )
	}
	if (window.Zepto) {
		window.Zepto.fn.waypoint = createExtension( window.Zepto )
	}
}())
;