mirror of
https://github.com/codeninjasllc/discourse.git
synced 2024-11-27 09:36:19 -05:00
Vendor the CloakedView stuff
This commit is contained in:
Robin Ward
parent
3a6ba907d9
commit
3a2ae97668
4 changed files with 274 additions and 241 deletions
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@ -1,164 +0,0 @@
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/**
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Display a list of cloaked items
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@class CloakedContainerView
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@extends Discourse.View
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@namespace Discourse
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@module Discourse
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**/
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Discourse.CloakedCollectionView = Ember.CollectionView.extend(Discourse.Scrolling, {
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topVisible: null,
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bottomVisible: null,
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init: function() {
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var cloakView = this.get('cloakView'),
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idProperty = this.get('idProperty') || 'id';
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this.set('slackRatio', Discourse.Capabilities.currentProp('slackRatio'));
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this.set('itemViewClass', Discourse.CloakedView.extend({
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classNames: [cloakView + '-cloak'],
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cloaks: Em.String.classify(cloakView) + 'View',
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defaultHeight: this.get('defaultHeight') || 100,
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init: function() {
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this._super();
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this.set('elementId', cloakView + '-cloak-' + this.get('content.' + idProperty));
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}
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}));
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this._super();
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Ember.run.next(this, 'scrolled');
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},
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/**
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If the topmost visible view changed, we will notify the controller if it has an appropriate hook.
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@method _topVisibleChanged
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@observes topVisible
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**/
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_topVisibleChanged: function() {
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var controller = this.get('controller');
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if (controller.topVisibleChanged) { controller.topVisibleChanged(this.get('topVisible')); }
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}.observes('topVisible'),
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/**
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If the bottommost visible view changed, we will notify the controller if it has an appropriate hook.
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@method _bottomVisible
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@observes bottomVisible
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**/
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_bottomVisible: function() {
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var controller = this.get('controller');
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if (controller.bottomVisibleChanged) { controller.bottomVisibleChanged(this.get('bottomVisible')); }
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}.observes('bottomVisible'),
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/**
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Binary search for finding the topmost view on screen.
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@method findTopView
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@param {Array} childViews the childViews to search through
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@param {Number} windowTop The top of the viewport to search against
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@param {Number} min The minimum index to search through of the child views
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@param {Number} max The max index to search through of the child views
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@returns {Number} the index into childViews of the topmost view
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**/
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findTopView: function(childViews, viewportTop, min, max) {
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if (max < min) { return min; }
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var mid = Math.floor((min + max) / 2),
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$view = childViews[mid].$(),
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viewBottom = $view.offset().top + $view.height();
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if (viewBottom > viewportTop) {
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return this.findTopView(childViews, viewportTop, min, mid-1);
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} else {
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return this.findTopView(childViews, viewportTop, mid+1, max);
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}
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},
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/**
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Determine what views are onscreen and cloak/uncloak them as necessary.
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@method scrolled
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**/
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scrolled: function() {
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var childViews = this.get('childViews'),
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toUncloak = [],
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$w = $(window),
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windowHeight = $w.height(),
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windowTop = $w.scrollTop(),
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slack = Math.round(windowHeight * this.get('slackRatio')),
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viewportTop = windowTop - slack,
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windowBottom = windowTop + windowHeight,
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viewportBottom = windowBottom + slack,
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topView = this.findTopView(childViews, viewportTop, 0, childViews.length-1),
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bodyHeight = $('body').height(),
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bottomView = topView,
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onscreen = [];
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if (windowBottom > bodyHeight) { windowBottom = bodyHeight; }
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if (viewportBottom > bodyHeight) { viewportBottom = bodyHeight; }
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// Find the bottom view and what's onscreen
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while (bottomView < childViews.length) {
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var view = childViews[bottomView],
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$view = view.$(),
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viewTop = $view.offset().top,
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viewBottom = viewTop + $view.height();
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if (viewTop > viewportBottom) { break; }
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toUncloak.push(view);
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if (viewBottom > windowTop && viewTop <= windowBottom) {
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onscreen.push(view.get('content'));
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}
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bottomView++;
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}
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if (bottomView >= childViews.length) { bottomView = childViews.length - 1; }
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// If our controller has a `sawObjects` method, pass the on screen objects to it.
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var controller = this.get('controller');
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if (onscreen.length) {
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this.setProperties({topVisible: onscreen[0], bottomVisible: onscreen[onscreen.length-1]});
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if (controller && controller.sawObjects) {
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Em.run.schedule('afterRender', function() {
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controller.sawObjects(onscreen);
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});
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}
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} else {
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this.setProperties({topVisible: null, bottomVisible: null});
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}
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var toCloak = childViews.slice(0, topView).concat(childViews.slice(bottomView+1)),
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loadingView = childViews[bottomView + 1];
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Em.run.schedule('afterRender', function() {
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toUncloak.forEach(function (v) { v.uncloak(); });
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toCloak.forEach(function (v) { v.cloak(); });
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});
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for (var j=bottomView; j<childViews.length; j++) {
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var checkView = childViews[j];
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if (!checkView.get('containedView')) {
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if (!checkView.get('loading')) {
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checkView.$().html("<div class='spinner'>" + I18n.t('loading') + "</div>");
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}
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return;
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}
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}
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},
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didInsertElement: function() {
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this.bindScrolling({debounce: 10});
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},
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willDestroyElement: function() {
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this.unbindScrolling();
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}
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});
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Discourse.View.registerHelper('cloaked-collection', Discourse.CloakedCollectionView);
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@ -1,77 +0,0 @@
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/**
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A cloaked view is one that removes its content when scrolled off the screen
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@class CloakedView
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@extends Discourse.View
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@namespace Discourse
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@module Discourse
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**/
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Discourse.CloakedView = Discourse.View.extend({
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attributeBindings: ['style'],
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init: function() {
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this._super();
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this.uncloak();
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},
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/**
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Triggers the set up for rendering a view that is cloaked.
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@method uncloak
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*/
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uncloak: function() {
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var containedView = this.get('containedView');
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if (!containedView) {
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this.setProperties({
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style: null,
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loading: false,
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containedView: this.createChildView(Discourse[this.get('cloaks')], { content: this.get('content') })
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});
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this.rerender();
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}
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},
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/**
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Removes the view from the DOM and tears down all observers.
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@method cloak
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*/
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cloak: function() {
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var containedView = this.get('containedView'),
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self = this;
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if (containedView && this.get('state') === 'inDOM') {
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var style = 'height: ' + this.$().height() + 'px;';
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this.set('style', style);
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this.$().prop('style', style);
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// We need to remove the container after the height of the element has taken
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// effect.
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Ember.run.schedule('afterRender', function() {
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self.set('containedView', null);
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containedView.willDestroyElement();
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containedView.remove();
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});
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}
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},
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/**
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Render the cloaked view if applicable.
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@method render
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*/
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render: function(buffer) {
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var containedView = this.get('containedView');
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if (containedView && containedView.get('state') !== 'inDOM') {
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containedView.renderToBuffer(buffer);
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containedView.transitionTo('inDOM');
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Em.run.schedule('afterRender', function() {
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containedView.didInsertElement();
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});
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}
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}
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});
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@ -32,6 +32,7 @@
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//= require rsvp.js
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//= require show-html.js
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//= require lock-on.js
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//= require ember-cloaking
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//= require ./discourse/helpers/i18n_helpers
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//= require ./discourse/mixins/ajax
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273
vendor/assets/javascripts/ember-cloaking.js
vendored
Normal file
273
vendor/assets/javascripts/ember-cloaking.js
vendored
Normal file
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@ -0,0 +1,273 @@
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(function () {
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/**
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Display a list of cloaked items
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@class CloakedContainerView
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@extends Ember.View
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@namespace Ember
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**/
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Ember.CloakedCollectionView = Ember.CollectionView.extend({
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topVisible: null,
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bottomVisible: null,
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init: function() {
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var cloakView = this.get('cloakView'),
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idProperty = this.get('idProperty') || 'id';
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// Set the slack ratio differently to allow for more or less slack in preloading
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var slackRatio = parseFloat(this.get('slackRatio'));
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if (!slackRatio) { this.set('slackRatio', 1.0); }
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this.set('itemViewClass', Ember.CloakedView.extend({
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classNames: [cloakView + '-cloak'],
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cloaks: cloakView,
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defaultHeight: this.get('defaultHeight') || 100,
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init: function() {
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this._super();
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this.set('elementId', cloakView + '-cloak-' + this.get('content.' + idProperty));
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}
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}));
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this._super();
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Ember.run.next(this, 'scrolled');
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},
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/**
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If the topmost visible view changed, we will notify the controller if it has an appropriate hook.
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@method _topVisibleChanged
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@observes topVisible
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**/
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_topVisibleChanged: function() {
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var controller = this.get('controller');
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if (controller.topVisibleChanged) { controller.topVisibleChanged(this.get('topVisible')); }
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}.observes('topVisible'),
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/**
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If the bottommost visible view changed, we will notify the controller if it has an appropriate hook.
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@method _bottomVisible
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@observes bottomVisible
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**/
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_bottomVisible: function() {
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var controller = this.get('controller');
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if (controller.bottomVisibleChanged) { controller.bottomVisibleChanged(this.get('bottomVisible')); }
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}.observes('bottomVisible'),
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/**
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Binary search for finding the topmost view on screen.
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@method findTopView
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@param {Array} childViews the childViews to search through
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@param {Number} windowTop The top of the viewport to search against
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@param {Number} min The minimum index to search through of the child views
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@param {Number} max The max index to search through of the child views
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@returns {Number} the index into childViews of the topmost view
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**/
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findTopView: function(childViews, viewportTop, min, max) {
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if (max < min) { return min; }
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var mid = Math.floor((min + max) / 2),
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$view = childViews[mid].$(),
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viewBottom = $view.offset().top + $view.height();
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if (viewBottom > viewportTop) {
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return this.findTopView(childViews, viewportTop, min, mid-1);
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} else {
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return this.findTopView(childViews, viewportTop, mid+1, max);
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}
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},
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/**
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Determine what views are onscreen and cloak/uncloak them as necessary.
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@method scrolled
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**/
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scrolled: function() {
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var childViews = this.get('childViews');
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if (childViews.length === 0) { return; }
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var toUncloak = [],
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$w = $(window),
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windowHeight = $w.height(),
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windowTop = $w.scrollTop(),
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slack = Math.round(windowHeight * this.get('slackRatio')),
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viewportTop = windowTop - slack,
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windowBottom = windowTop + windowHeight,
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viewportBottom = windowBottom + slack,
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topView = this.findTopView(childViews, viewportTop, 0, childViews.length-1),
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bodyHeight = $('body').height(),
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bottomView = topView,
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onscreen = [];
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if (windowBottom > bodyHeight) { windowBottom = bodyHeight; }
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if (viewportBottom > bodyHeight) { viewportBottom = bodyHeight; }
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// Find the bottom view and what's onscreen
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while (bottomView < childViews.length) {
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var view = childViews[bottomView],
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$view = view.$(),
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viewTop = $view.offset().top,
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viewBottom = viewTop + $view.height();
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if (viewTop > viewportBottom) { break; }
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toUncloak.push(view);
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if (viewBottom > windowTop && viewTop <= windowBottom) {
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onscreen.push(view.get('content'));
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}
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bottomView++;
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}
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if (bottomView >= childViews.length) { bottomView = childViews.length - 1; }
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// If our controller has a `sawObjects` method, pass the on screen objects to it.
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var controller = this.get('controller');
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if (onscreen.length) {
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this.setProperties({topVisible: onscreen[0], bottomVisible: onscreen[onscreen.length-1]});
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if (controller && controller.sawObjects) {
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Em.run.schedule('afterRender', function() {
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controller.sawObjects(onscreen);
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});
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}
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} else {
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this.setProperties({topVisible: null, bottomVisible: null});
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}
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var toCloak = childViews.slice(0, topView).concat(childViews.slice(bottomView+1)),
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loadingView = childViews[bottomView + 1];
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Em.run.schedule('afterRender', function() {
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toUncloak.forEach(function (v) { v.uncloak(); });
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toCloak.forEach(function (v) { v.cloak(); });
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});
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for (var j=bottomView; j<childViews.length; j++) {
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var checkView = childViews[j];
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if (!checkView.get('containedView')) {
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if (!checkView.get('loading')) {
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checkView.$().html("<div class='spinner'>" + I18n.t('loading') + "</div>");
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}
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return;
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}
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}
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},
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scrollTriggered: function() {
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Em.run.scheduleOnce('afterRender', this, 'scrolled');
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},
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didInsertElement: function() {
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var self = this,
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onScrollMethod = function() {
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Ember.run.debounce(self, 'scrollTriggered', 10);
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};
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$(document).bind('touchmove.ember-cloak', onScrollMethod);
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$(window).bind('scroll.ember-cloak', onScrollMethod);
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},
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willDestroyElement: function() {
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$(document).bind('touchmove.ember-cloak');
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$(window).bind('scroll.ember-cloak');
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}
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});
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/**
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A cloaked view is one that removes its content when scrolled off the screen
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@class CloakedView
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@extends Ember.View
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@namespace Ember
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**/
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Ember.CloakedView = Ember.View.extend({
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attributeBindings: ['style'],
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init: function() {
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this._super();
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this.uncloak();
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},
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/**
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Triggers the set up for rendering a view that is cloaked.
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@method uncloak
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*/
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uncloak: function() {
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var containedView = this.get('containedView');
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if (!containedView) {
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this.setProperties({
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style: null,
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loading: false,
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containedView: this.createChildView(this.get('cloaks'), {content: this.get('content') })
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});
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this.rerender();
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}
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},
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/**
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Removes the view from the DOM and tears down all observers.
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@method cloak
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*/
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cloak: function() {
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var containedView = this.get('containedView'),
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self = this;
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if (containedView && this.get('state') === 'inDOM') {
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var style = 'height: ' + this.$().height() + 'px;';
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this.set('style', style);
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this.$().prop('style', style);
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// We need to remove the container after the height of the element has taken
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// effect.
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Ember.run.schedule('afterRender', function() {
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self.set('containedView', null);
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containedView.willDestroyElement();
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containedView.remove();
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});
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}
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},
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/**
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Render the cloaked view if applicable.
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@method render
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*/
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render: function(buffer) {
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var containedView = this.get('containedView');
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if (containedView && containedView.get('state') !== 'inDOM') {
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containedView.renderToBuffer(buffer);
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containedView.transitionTo('inDOM');
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Em.run.schedule('afterRender', function() {
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containedView.didInsertElement();
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});
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}
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}
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});
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Ember.Handlebars.registerHelper('cloaked-collection', function(options) {
|
||||
var hash = options.hash,
|
||||
types = options.hashTypes;
|
||||
|
||||
for (var prop in hash) {
|
||||
if (types[prop] === 'ID') {
|
||||
hash[prop + 'Binding'] = hash[prop];
|
||||
delete hash[prop];
|
||||
}
|
||||
}
|
||||
return Ember.Handlebars.helpers.view.call(this, Ember.CloakedCollectionView, options);
|
||||
});
|
||||
|
||||
})();
|
||||
Loading…
Reference in a new issue