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/*! Waypoints - 4.0.0 Copyright © 2011-2015 Caleb Troughton Licensed under the MIT license. https://github.com/imakewebthings/waypoints/blob/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 = isWindow ? undefined : 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 } } } Waypoint.requestAnimationFrame(function() { 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) } }()) ;
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