68 lines
1.6 KiB
JavaScript
68 lines
1.6 KiB
JavaScript
/**
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This mixin adds support for being notified every time the browser window
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is scrolled.
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@class Scrolling
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@extends Ember.Mixin
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@namespace Discourse
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@module Discourse
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**/
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Discourse.Scrolling = Em.Mixin.create({
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/**
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Begin watching for scroll events. By default they will be called at max every 100ms.
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call with {debounce: N} for a diff time
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@method bindScrolling
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*/
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bindScrolling: function(opts) {
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opts = opts || {debounce: 100};
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var self = this,
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onScrollMethod = function() {
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return Em.run.scheduleOnce('afterRender', self, 'scrolled');
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};
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if (opts.debounce) {
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onScrollMethod = Discourse.debounce(onScrollMethod, opts.debounce);
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}
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Discourse.ScrollingDOMMethods.bindOnScroll(onScrollMethod, opts.name);
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},
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/**
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Stop watching for scroll events.
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@method unbindScrolling
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*/
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unbindScrolling: function(name) {
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Discourse.ScrollingDOMMethods.unbindOnScroll(name);
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}
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});
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/**
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This object provides the DOM methods we need for our Mixin to bind to scrolling
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methods in the browser. By removing them from the Mixin we can test them
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easier.
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@class ScrollingDOMMethods
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@module Discourse
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**/
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Discourse.ScrollingDOMMethods = {
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bindOnScroll: function(onScrollMethod, name) {
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name = name || 'default';
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$(document).bind('touchmove.discourse-' + name, onScrollMethod);
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$(window).bind('scroll.discourse-' + name, onScrollMethod);
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},
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unbindOnScroll: function(name) {
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name = name || 'default';
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$(window).unbind('scroll.discourse-' + name);
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$(document).unbind('touchmove.discourse-' + name);
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}
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}; |