99 lines
2.4 KiB
JavaScript
99 lines
2.4 KiB
JavaScript
app.views.Stream = Backbone.View.extend({
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events: {
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"click #paginate": "render"
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},
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initialize: function() {
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this.collection = this.collection || new app.collections.Stream;
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this.collection.bind("add", this.addPost, this);
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this.publisher = new app.views.Publisher({collection : this.collection});
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// inf scroll
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// we're using this._loading to keep track of backbone's collection
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// fetching state... is there a better way to do this?
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var throttledScroll = _.throttle($.proxy(this.infScroll, this), 200);
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$(window).scroll(throttledScroll);
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// lightbox delegation
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this.lightbox = Diaspora.BaseWidget.instantiate("Lightbox");
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$(this.el).delegate("a.stream-photo-link", "click", this.lightbox.lightboxImageClicked);
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return this;
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},
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infScroll : function() {
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if(this.allContentLoaded || this.isLoading()) { return }
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var $window = $(window);
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var distFromTop = $window.height() + $window.scrollTop();
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var distFromBottom = $(document).height() - distFromTop;
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var bufferPx = 500;
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if(distFromBottom < bufferPx) {
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this.render();
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}
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return this;
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},
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isLoading : function(){
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return this._loading && !this._loading.isResolved();
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},
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allContentLoaded : false,
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addPost : function(post) {
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var postView = new app.views.Post({ model: post });
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$(this.el)[
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(this.collection.at(0).id == post.id)
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? "prepend"
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: "append"
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](postView.render().el);
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return this;
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},
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collectionFetched: function(collection, response) {
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this.$("#paginate").remove();
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if(!collection.parse(response).length || collection.parse(response).length == 0) {
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this.allContentLoaded = true;
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$(window).unbind('scroll')
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return
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}
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$(this.el).append($("<a>", {
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href: this.collection.url(),
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id: "paginate"
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}).text('Load more posts'));
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},
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render : function(evt) {
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if(evt) { evt.preventDefault(); }
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var self = this;
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self.addLoader();
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this._loading = self.collection.fetch({
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add: true,
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success: $.proxy(this.collectionFetched, self)
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});
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return this;
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},
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addLoader: function(){
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if(this.$("#paginate").length == 0) {
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$(this.el).append($("<div>", {
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"id" : "paginate"
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}));
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}
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this.$("#paginate").html($("<img>", {
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src : "/images/static-loader.png",
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"class" : "loader"
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}));
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}
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});
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