662 lines
18 KiB
JavaScript
662 lines
18 KiB
JavaScript
/*!
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Waypoints - 4.0.1
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Copyright © 2011-2016 Caleb Troughton
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Licensed under the MIT license.
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https://github.com/imakewebthings/waypoints/blob/master/licenses.txt
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*/
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(function() {
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'use strict'
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var keyCounter = 0
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var allWaypoints = {}
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/* http://imakewebthings.com/waypoints/api/waypoint */
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function Waypoint(options) {
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if (!options) {
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throw new Error('No options passed to Waypoint constructor')
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}
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if (!options.element) {
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throw new Error('No element option passed to Waypoint constructor')
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}
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if (!options.handler) {
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throw new Error('No handler option passed to Waypoint constructor')
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}
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this.key = 'waypoint-' + keyCounter
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this.options = Waypoint.Adapter.extend({}, Waypoint.defaults, options)
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this.element = this.options.element
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this.adapter = new Waypoint.Adapter(this.element)
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this.callback = options.handler
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this.axis = this.options.horizontal ? 'horizontal' : 'vertical'
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this.enabled = this.options.enabled
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this.triggerPoint = null
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this.group = Waypoint.Group.findOrCreate({
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name: this.options.group,
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axis: this.axis
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})
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this.context = Waypoint.Context.findOrCreateByElement(this.options.context)
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if (Waypoint.offsetAliases[this.options.offset]) {
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this.options.offset = Waypoint.offsetAliases[this.options.offset]
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}
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this.group.add(this)
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this.context.add(this)
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allWaypoints[this.key] = this
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keyCounter += 1
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}
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/* Private */
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Waypoint.prototype.queueTrigger = function(direction) {
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this.group.queueTrigger(this, direction)
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}
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/* Private */
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Waypoint.prototype.trigger = function(args) {
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if (!this.enabled) {
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return
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}
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if (this.callback) {
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this.callback.apply(this, args)
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}
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}
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/* Public */
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/* http://imakewebthings.com/waypoints/api/destroy */
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Waypoint.prototype.destroy = function() {
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this.context.remove(this)
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this.group.remove(this)
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delete allWaypoints[this.key]
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}
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/* Public */
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/* http://imakewebthings.com/waypoints/api/disable */
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Waypoint.prototype.disable = function() {
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this.enabled = false
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return this
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}
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/* Public */
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/* http://imakewebthings.com/waypoints/api/enable */
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Waypoint.prototype.enable = function() {
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this.context.refresh()
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this.enabled = true
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return this
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}
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/* Public */
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/* http://imakewebthings.com/waypoints/api/next */
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Waypoint.prototype.next = function() {
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return this.group.next(this)
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}
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/* Public */
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/* http://imakewebthings.com/waypoints/api/previous */
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Waypoint.prototype.previous = function() {
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return this.group.previous(this)
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}
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/* Private */
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Waypoint.invokeAll = function(method) {
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var allWaypointsArray = []
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for (var waypointKey in allWaypoints) {
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allWaypointsArray.push(allWaypoints[waypointKey])
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}
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for (var i = 0, end = allWaypointsArray.length; i < end; i++) {
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allWaypointsArray[i][method]()
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}
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}
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/* Public */
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/* http://imakewebthings.com/waypoints/api/destroy-all */
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Waypoint.destroyAll = function() {
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Waypoint.invokeAll('destroy')
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}
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/* Public */
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/* http://imakewebthings.com/waypoints/api/disable-all */
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Waypoint.disableAll = function() {
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Waypoint.invokeAll('disable')
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}
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/* Public */
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/* http://imakewebthings.com/waypoints/api/enable-all */
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Waypoint.enableAll = function() {
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Waypoint.Context.refreshAll()
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for (var waypointKey in allWaypoints) {
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allWaypoints[waypointKey].enabled = true
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}
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return this
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}
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/* Public */
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/* http://imakewebthings.com/waypoints/api/refresh-all */
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Waypoint.refreshAll = function() {
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Waypoint.Context.refreshAll()
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}
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/* Public */
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/* http://imakewebthings.com/waypoints/api/viewport-height */
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Waypoint.viewportHeight = function() {
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return window.innerHeight || document.documentElement.clientHeight
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}
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/* Public */
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/* http://imakewebthings.com/waypoints/api/viewport-width */
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Waypoint.viewportWidth = function() {
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return document.documentElement.clientWidth
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}
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Waypoint.adapters = []
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Waypoint.defaults = {
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context: window,
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continuous: true,
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enabled: true,
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group: 'default',
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horizontal: false,
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offset: 0
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}
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Waypoint.offsetAliases = {
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'bottom-in-view': function() {
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return this.context.innerHeight() - this.adapter.outerHeight()
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},
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'right-in-view': function() {
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return this.context.innerWidth() - this.adapter.outerWidth()
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}
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}
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window.Waypoint = Waypoint
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}())
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;(function() {
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'use strict'
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function requestAnimationFrameShim(callback) {
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window.setTimeout(callback, 1000 / 60)
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}
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var keyCounter = 0
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var contexts = {}
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var Waypoint = window.Waypoint
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var oldWindowLoad = window.onload
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/* http://imakewebthings.com/waypoints/api/context */
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function Context(element) {
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this.element = element
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this.Adapter = Waypoint.Adapter
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this.adapter = new this.Adapter(element)
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this.key = 'waypoint-context-' + keyCounter
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this.didScroll = false
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this.didResize = false
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this.oldScroll = {
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x: this.adapter.scrollLeft(),
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y: this.adapter.scrollTop()
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}
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this.waypoints = {
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vertical: {},
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horizontal: {}
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}
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element.waypointContextKey = this.key
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contexts[element.waypointContextKey] = this
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keyCounter += 1
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if (!Waypoint.windowContext) {
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Waypoint.windowContext = true
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Waypoint.windowContext = new Context(window)
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}
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this.createThrottledScrollHandler()
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this.createThrottledResizeHandler()
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}
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/* Private */
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Context.prototype.add = function(waypoint) {
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var axis = waypoint.options.horizontal ? 'horizontal' : 'vertical'
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this.waypoints[axis][waypoint.key] = waypoint
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this.refresh()
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}
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/* Private */
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Context.prototype.checkEmpty = function() {
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var horizontalEmpty = this.Adapter.isEmptyObject(this.waypoints.horizontal)
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var verticalEmpty = this.Adapter.isEmptyObject(this.waypoints.vertical)
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var isWindow = this.element == this.element.window
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if (horizontalEmpty && verticalEmpty && !isWindow) {
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this.adapter.off('.waypoints')
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delete contexts[this.key]
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}
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}
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/* Private */
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Context.prototype.createThrottledResizeHandler = function() {
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var self = this
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function resizeHandler() {
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self.handleResize()
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self.didResize = false
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}
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this.adapter.on('resize.waypoints', function() {
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if (!self.didResize) {
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self.didResize = true
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Waypoint.requestAnimationFrame(resizeHandler)
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}
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})
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}
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/* Private */
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Context.prototype.createThrottledScrollHandler = function() {
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var self = this
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function scrollHandler() {
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self.handleScroll()
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self.didScroll = false
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}
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this.adapter.on('scroll.waypoints', function() {
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if (!self.didScroll || Waypoint.isTouch) {
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self.didScroll = true
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Waypoint.requestAnimationFrame(scrollHandler)
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}
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})
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}
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/* Private */
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Context.prototype.handleResize = function() {
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Waypoint.Context.refreshAll()
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}
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/* Private */
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Context.prototype.handleScroll = function() {
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var triggeredGroups = {}
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var axes = {
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horizontal: {
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newScroll: this.adapter.scrollLeft(),
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oldScroll: this.oldScroll.x,
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forward: 'right',
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backward: 'left'
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},
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vertical: {
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newScroll: this.adapter.scrollTop(),
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oldScroll: this.oldScroll.y,
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forward: 'down',
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backward: 'up'
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}
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}
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for (var axisKey in axes) {
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var axis = axes[axisKey]
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var isForward = axis.newScroll > axis.oldScroll
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var direction = isForward ? axis.forward : axis.backward
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for (var waypointKey in this.waypoints[axisKey]) {
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var waypoint = this.waypoints[axisKey][waypointKey]
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if (waypoint.triggerPoint === null) {
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continue
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}
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var wasBeforeTriggerPoint = axis.oldScroll < waypoint.triggerPoint
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var nowAfterTriggerPoint = axis.newScroll >= waypoint.triggerPoint
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var crossedForward = wasBeforeTriggerPoint && nowAfterTriggerPoint
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var crossedBackward = !wasBeforeTriggerPoint && !nowAfterTriggerPoint
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if (crossedForward || crossedBackward) {
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waypoint.queueTrigger(direction)
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triggeredGroups[waypoint.group.id] = waypoint.group
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}
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}
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}
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for (var groupKey in triggeredGroups) {
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triggeredGroups[groupKey].flushTriggers()
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}
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this.oldScroll = {
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x: axes.horizontal.newScroll,
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y: axes.vertical.newScroll
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}
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}
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/* Private */
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Context.prototype.innerHeight = function() {
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/*eslint-disable eqeqeq */
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if (this.element == this.element.window) {
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return Waypoint.viewportHeight()
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}
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/*eslint-enable eqeqeq */
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return this.adapter.innerHeight()
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}
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/* Private */
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Context.prototype.remove = function(waypoint) {
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delete this.waypoints[waypoint.axis][waypoint.key]
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this.checkEmpty()
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}
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/* Private */
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Context.prototype.innerWidth = function() {
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/*eslint-disable eqeqeq */
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if (this.element == this.element.window) {
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return Waypoint.viewportWidth()
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}
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/*eslint-enable eqeqeq */
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return this.adapter.innerWidth()
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}
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/* Public */
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/* http://imakewebthings.com/waypoints/api/context-destroy */
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Context.prototype.destroy = function() {
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var allWaypoints = []
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for (var axis in this.waypoints) {
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for (var waypointKey in this.waypoints[axis]) {
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allWaypoints.push(this.waypoints[axis][waypointKey])
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}
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}
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for (var i = 0, end = allWaypoints.length; i < end; i++) {
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allWaypoints[i].destroy()
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}
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}
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/* Public */
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/* http://imakewebthings.com/waypoints/api/context-refresh */
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Context.prototype.refresh = function() {
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/*eslint-disable eqeqeq */
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var isWindow = this.element == this.element.window
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/*eslint-enable eqeqeq */
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var contextOffset = isWindow ? undefined : this.adapter.offset()
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var triggeredGroups = {}
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var axes
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this.handleScroll()
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axes = {
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horizontal: {
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contextOffset: isWindow ? 0 : contextOffset.left,
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contextScroll: isWindow ? 0 : this.oldScroll.x,
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contextDimension: this.innerWidth(),
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oldScroll: this.oldScroll.x,
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forward: 'right',
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backward: 'left',
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offsetProp: 'left'
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},
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vertical: {
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contextOffset: isWindow ? 0 : contextOffset.top,
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contextScroll: isWindow ? 0 : this.oldScroll.y,
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contextDimension: this.innerHeight(),
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oldScroll: this.oldScroll.y,
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forward: 'down',
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backward: 'up',
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offsetProp: 'top'
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}
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}
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for (var axisKey in axes) {
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var axis = axes[axisKey]
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for (var waypointKey in this.waypoints[axisKey]) {
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var waypoint = this.waypoints[axisKey][waypointKey]
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var adjustment = waypoint.options.offset
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var oldTriggerPoint = waypoint.triggerPoint
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var elementOffset = 0
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var freshWaypoint = oldTriggerPoint == null
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var contextModifier, wasBeforeScroll, nowAfterScroll
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var triggeredBackward, triggeredForward
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if (waypoint.element !== waypoint.element.window) {
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elementOffset = waypoint.adapter.offset()[axis.offsetProp]
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}
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if (typeof adjustment === 'function') {
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adjustment = adjustment.apply(waypoint)
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}
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else if (typeof adjustment === 'string') {
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adjustment = parseFloat(adjustment)
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if (waypoint.options.offset.indexOf('%') > - 1) {
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adjustment = Math.ceil(axis.contextDimension * adjustment / 100)
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}
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}
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contextModifier = axis.contextScroll - axis.contextOffset
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waypoint.triggerPoint = Math.floor(elementOffset + contextModifier - adjustment)
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wasBeforeScroll = oldTriggerPoint < axis.oldScroll
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nowAfterScroll = waypoint.triggerPoint >= axis.oldScroll
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triggeredBackward = wasBeforeScroll && nowAfterScroll
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triggeredForward = !wasBeforeScroll && !nowAfterScroll
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if (!freshWaypoint && triggeredBackward) {
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waypoint.queueTrigger(axis.backward)
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triggeredGroups[waypoint.group.id] = waypoint.group
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}
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else if (!freshWaypoint && triggeredForward) {
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waypoint.queueTrigger(axis.forward)
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triggeredGroups[waypoint.group.id] = waypoint.group
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}
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else if (freshWaypoint && axis.oldScroll >= waypoint.triggerPoint) {
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waypoint.queueTrigger(axis.forward)
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triggeredGroups[waypoint.group.id] = waypoint.group
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}
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}
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}
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Waypoint.requestAnimationFrame(function() {
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for (var groupKey in triggeredGroups) {
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triggeredGroups[groupKey].flushTriggers()
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}
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})
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return this
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}
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/* Private */
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Context.findOrCreateByElement = function(element) {
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return Context.findByElement(element) || new Context(element)
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}
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/* Private */
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Context.refreshAll = function() {
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for (var contextId in contexts) {
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contexts[contextId].refresh()
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}
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}
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/* Public */
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/* http://imakewebthings.com/waypoints/api/context-find-by-element */
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Context.findByElement = function(element) {
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return contexts[element.waypointContextKey]
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}
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window.onload = function() {
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if (oldWindowLoad) {
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oldWindowLoad()
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}
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Context.refreshAll()
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}
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Waypoint.requestAnimationFrame = function(callback) {
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var requestFn = window.requestAnimationFrame ||
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window.mozRequestAnimationFrame ||
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window.webkitRequestAnimationFrame ||
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requestAnimationFrameShim
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requestFn.call(window, callback)
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}
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Waypoint.Context = Context
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}())
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;(function() {
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'use strict'
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function byTriggerPoint(a, b) {
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return a.triggerPoint - b.triggerPoint
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}
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function byReverseTriggerPoint(a, b) {
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return b.triggerPoint - a.triggerPoint
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}
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var groups = {
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vertical: {},
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horizontal: {}
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}
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var Waypoint = window.Waypoint
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/* http://imakewebthings.com/waypoints/api/group */
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function Group(options) {
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this.name = options.name
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this.axis = options.axis
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this.id = this.name + '-' + this.axis
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this.waypoints = []
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this.clearTriggerQueues()
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groups[this.axis][this.name] = this
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}
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/* Private */
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Group.prototype.add = function(waypoint) {
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this.waypoints.push(waypoint)
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}
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/* Private */
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Group.prototype.clearTriggerQueues = function() {
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this.triggerQueues = {
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up: [],
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down: [],
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left: [],
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right: []
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}
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}
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/* Private */
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Group.prototype.flushTriggers = function() {
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for (var direction in this.triggerQueues) {
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var waypoints = this.triggerQueues[direction]
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var reverse = direction === 'up' || direction === 'left'
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waypoints.sort(reverse ? byReverseTriggerPoint : byTriggerPoint)
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for (var i = 0, end = waypoints.length; i < end; i += 1) {
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var waypoint = waypoints[i]
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if (waypoint.options.continuous || i === waypoints.length - 1) {
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waypoint.trigger([direction])
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}
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}
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}
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this.clearTriggerQueues()
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}
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/* Private */
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Group.prototype.next = function(waypoint) {
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this.waypoints.sort(byTriggerPoint)
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var index = Waypoint.Adapter.inArray(waypoint, this.waypoints)
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var isLast = index === this.waypoints.length - 1
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return isLast ? null : this.waypoints[index + 1]
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}
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/* Private */
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Group.prototype.previous = function(waypoint) {
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this.waypoints.sort(byTriggerPoint)
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var index = Waypoint.Adapter.inArray(waypoint, this.waypoints)
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return index ? this.waypoints[index - 1] : null
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}
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/* Private */
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Group.prototype.queueTrigger = function(waypoint, direction) {
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this.triggerQueues[direction].push(waypoint)
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}
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/* Private */
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Group.prototype.remove = function(waypoint) {
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var index = Waypoint.Adapter.inArray(waypoint, this.waypoints)
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if (index > -1) {
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this.waypoints.splice(index, 1)
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}
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}
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/* Public */
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/* http://imakewebthings.com/waypoints/api/first */
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Group.prototype.first = function() {
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return this.waypoints[0]
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}
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/* Public */
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/* http://imakewebthings.com/waypoints/api/last */
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Group.prototype.last = function() {
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return this.waypoints[this.waypoints.length - 1]
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}
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/* Private */
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Group.findOrCreate = function(options) {
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return groups[options.axis][options.name] || new Group(options)
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}
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Waypoint.Group = Group
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}())
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;(function() {
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'use strict'
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var $ = window.jQuery
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var Waypoint = window.Waypoint
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function JQueryAdapter(element) {
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this.$element = $(element)
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}
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$.each([
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'innerHeight',
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'innerWidth',
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'off',
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'offset',
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'on',
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'outerHeight',
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'outerWidth',
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'scrollLeft',
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'scrollTop'
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], function(i, method) {
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JQueryAdapter.prototype[method] = function() {
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var args = Array.prototype.slice.call(arguments)
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return this.$element[method].apply(this.$element, args)
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}
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})
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$.each([
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'extend',
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'inArray',
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'isEmptyObject'
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], function(i, method) {
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JQueryAdapter[method] = $[method]
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})
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Waypoint.adapters.push({
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name: 'jquery',
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Adapter: JQueryAdapter
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})
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Waypoint.Adapter = JQueryAdapter
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}())
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;(function() {
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'use strict'
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|
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var Waypoint = window.Waypoint
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function createExtension(framework) {
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return function() {
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var waypoints = []
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var overrides = arguments[0]
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if (framework.isFunction(arguments[0])) {
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overrides = framework.extend({}, arguments[1])
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overrides.handler = arguments[0]
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}
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this.each(function() {
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var options = framework.extend({}, overrides, {
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element: this
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})
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if (typeof options.context === 'string') {
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options.context = framework(this).closest(options.context)[0]
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}
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waypoints.push(new Waypoint(options))
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})
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return waypoints
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}
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}
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if (window.jQuery) {
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window.jQuery.fn.waypoint = createExtension(window.jQuery)
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}
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if (window.Zepto) {
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window.Zepto.fn.waypoint = createExtension(window.Zepto)
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}
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}())
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; |