[483] | 1 | dojo.provide("dojox.widget.FeedPortlet"); |
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| 2 | dojo.require("dojox.widget.Portlet"); |
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| 3 | dojo.require("dijit.Tooltip"); |
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| 4 | dojo.require("dijit.form.TextBox"); |
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| 5 | dojo.require("dijit.form.Button"); |
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| 6 | dojo.require("dojox.data.GoogleFeedStore"); |
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| 7 | |
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| 8 | dojo.declare("dojox.widget.FeedPortlet", dojox.widget.Portlet, { |
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| 9 | // summary: |
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| 10 | // A Portlet that loads a XML feed. |
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| 11 | // description: |
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| 12 | // The feed is displayed as |
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| 13 | // an unordered list of links. When a link is hovered over |
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| 14 | // by the mouse, it displays a summary in a tooltip. |
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| 15 | |
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| 16 | // local: Boolean |
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| 17 | // Specifies whether the feed is to be loaded from the same domain as the |
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| 18 | // page, or a remote domain. If local is true, then the feed must be an |
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| 19 | // Atom feed. If it is false, it can be an Atom or RSS feed. |
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| 20 | local: false, |
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| 21 | |
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| 22 | // maxResults: Number |
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| 23 | // The number of results to display from the feed. |
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| 24 | maxResults: 5, |
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| 25 | |
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| 26 | // url: String |
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| 27 | // The URL of the feed to load. If this is different to the domain |
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| 28 | // of the HTML page, local should be set to false. |
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| 29 | url: "", |
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| 30 | |
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| 31 | // openNew: Boolean |
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| 32 | // If true, when a link is clicked it will open in a new window. |
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| 33 | // If false, it will not. |
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| 34 | openNew: true, |
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| 35 | |
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| 36 | // useFeedTitle: Boolean |
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| 37 | // If true, the title of the loaded feed is displayed in the title bar of the portlet. |
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| 38 | // If false, the title remains unchanged. |
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| 39 | showFeedTitle: true, |
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| 40 | |
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| 41 | postCreate: function(){ |
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| 42 | this.inherited(arguments); |
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| 43 | if(this.local && !dojox.data.AtomReadStore){ |
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| 44 | throw Error(this.declaredClass + ": To use local feeds, you must include dojox.data.AtomReadStore on the page."); |
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| 45 | } |
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| 46 | }, |
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| 47 | |
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| 48 | onFeedError: function(){ |
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| 49 | // summary: |
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| 50 | // Called when a feed fails to load successfully. |
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| 51 | this.containerNode.innerHTML = "Error accessing the feed." |
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| 52 | }, |
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| 53 | |
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| 54 | addChild: function(child){ |
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| 55 | this.inherited(arguments); |
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| 56 | var url = child.attr("feedPortletUrl"); |
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| 57 | if(url){ |
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| 58 | this.set("url", url); |
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| 59 | } |
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| 60 | }, |
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| 61 | |
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| 62 | _getTitle: function(item){ |
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| 63 | // summary: |
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| 64 | // Gets the title of a feed item. |
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| 65 | var t = this.store.getValue(item, "title"); |
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| 66 | return this.local ? t.text : t; |
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| 67 | }, |
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| 68 | |
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| 69 | _getLink: function(item){ |
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| 70 | // summary: |
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| 71 | // Gets the href link of a feed item. |
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| 72 | var l = this.store.getValue(item, "link"); |
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| 73 | return this.local ? l.href : l; |
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| 74 | }, |
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| 75 | |
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| 76 | _getContent: function(item){ |
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| 77 | // summary: |
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| 78 | // Gets the summary of a feed item. |
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| 79 | var c = this.store.getValue(item, "summary"); |
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| 80 | if(!c){ |
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| 81 | return null; |
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| 82 | } |
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| 83 | if(this.local){ |
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| 84 | c = c.text; |
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| 85 | } |
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| 86 | // Filter out any sneaky scripts in the code |
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| 87 | c = c.split("<script").join("<!--").split("</script>").join("-->"); |
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| 88 | c = c.split("<iframe").join("<!--").split("</iframe>").join("-->"); |
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| 89 | return c; |
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| 90 | |
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| 91 | }, |
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| 92 | |
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| 93 | _setUrlAttr: function(url){ |
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| 94 | // summary: |
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| 95 | // Sets the URL to load. |
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| 96 | this.url = url; |
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| 97 | if(this._started){ |
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| 98 | this.load(); |
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| 99 | } |
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| 100 | }, |
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| 101 | |
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| 102 | startup: function(){ |
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| 103 | // summary: |
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| 104 | // Loads the widget. |
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| 105 | if(this.started || this._started){return;} |
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| 106 | |
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| 107 | this.inherited(arguments); |
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| 108 | |
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| 109 | if(!this.url || this.url == ""){ |
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| 110 | throw new Error(this.id + ": A URL must be specified for the feed portlet"); |
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| 111 | } |
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| 112 | if(this.url && this.url != ""){ |
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| 113 | this.load(); |
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| 114 | } |
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| 115 | }, |
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| 116 | |
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| 117 | load: function(){ |
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| 118 | // summary: |
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| 119 | // Loads the feed. |
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| 120 | if(this._resultList){ |
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| 121 | dojo.destroy(this._resultList); |
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| 122 | } |
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| 123 | var store, query; |
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| 124 | |
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| 125 | // If the feed is on the same domain, use the AtomReadStore, |
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| 126 | // as we cannot be guaranteed that it will be available to |
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| 127 | // Google services. |
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| 128 | if(this.local){ |
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| 129 | store = new dojox.data.AtomReadStore({ |
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| 130 | url: this.url |
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| 131 | }); |
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| 132 | query = {}; |
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| 133 | |
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| 134 | }else{ |
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| 135 | store = new dojox.data.GoogleFeedStore(); |
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| 136 | query = {url: this.url}; |
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| 137 | } |
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| 138 | var request = { |
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| 139 | query: query, |
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| 140 | count: this.maxResults, |
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| 141 | onComplete: dojo.hitch(this, function(items){ |
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| 142 | if (this.showFeedTitle && store.getFeedValue) { |
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| 143 | var title = this.store.getFeedValue("title"); |
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| 144 | if(title){ |
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| 145 | this.set("title", title.text ? title.text : title); |
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| 146 | } |
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| 147 | } |
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| 148 | this.generateResults(items); |
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| 149 | }), |
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| 150 | onError: dojo.hitch(this, "onFeedError") |
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| 151 | }; |
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| 152 | |
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| 153 | this.store = store; |
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| 154 | store.fetch(request); |
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| 155 | }, |
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| 156 | |
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| 157 | generateResults: function (items){ |
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| 158 | // summary: |
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| 159 | // Generates a list of hyperlinks and displays a tooltip |
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| 160 | // containing a summary when the mouse hovers over them. |
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| 161 | var store = this.store; |
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| 162 | var timer; |
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| 163 | var ul = (this._resultList = |
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| 164 | dojo.create("ul", {"class" : "dojoxFeedPortletList"}, this.containerNode)); |
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| 165 | |
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| 166 | dojo.forEach(items, dojo.hitch(this, function(item){ |
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| 167 | var li = dojo.create("li", { |
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| 168 | innerHTML: '<a href="' |
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| 169 | + this._getLink(item) |
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| 170 | + '"' |
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| 171 | + (this.openNew ? ' target="_blank"' : '') |
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| 172 | +'>' |
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| 173 | + this._getTitle(item) + '</a>' |
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| 174 | },ul); |
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| 175 | |
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| 176 | dojo.connect(li, "onmouseover", dojo.hitch(this, function(evt){ |
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| 177 | if(timer){ |
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| 178 | clearTimeout(timer); |
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| 179 | } |
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| 180 | |
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| 181 | // Show the tooltip after the mouse has been hovering |
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| 182 | // for a short time. |
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| 183 | timer = setTimeout(dojo.hitch(this, function(){ |
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| 184 | timer = null; |
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| 185 | var summary = this._getContent(item); |
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| 186 | if(!summary){return;} |
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| 187 | var content = '<div class="dojoxFeedPortletPreview">' |
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| 188 | + summary + '</div>' |
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| 189 | |
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| 190 | dojo.query("li", ul).forEach(function(item){ |
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| 191 | if(item != evt.target){ |
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| 192 | dijit.hideTooltip(item); |
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| 193 | } |
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| 194 | }); |
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| 195 | |
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| 196 | // Hover the tooltip over the anchor tag |
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| 197 | dijit.showTooltip(content, li.firstChild, !this.isLeftToRight()); |
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| 198 | }), 500); |
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| 199 | |
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| 200 | |
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| 201 | })); |
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| 202 | |
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| 203 | // Hide the tooltip when the mouse leaves a list item. |
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| 204 | dojo.connect(li, "onmouseout", function(){ |
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| 205 | if(timer){ |
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| 206 | clearTimeout(timer); |
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| 207 | timer = null; |
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| 208 | } |
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| 209 | dijit.hideTooltip(li.firstChild); |
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| 210 | }); |
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| 211 | })); |
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| 212 | |
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| 213 | this.resize(); |
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| 214 | } |
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| 215 | }); |
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| 216 | |
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| 217 | dojo.declare("dojox.widget.ExpandableFeedPortlet", dojox.widget.FeedPortlet, { |
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| 218 | // summary: |
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| 219 | // A FeedPortlet that uses an list of expandable links to display |
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| 220 | // a feed. An icon is placed to the left of each item |
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| 221 | // which, when clicked, toggles the visible state |
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| 222 | // of the item summary. |
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| 223 | |
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| 224 | // onlyOpenOne: Boolean |
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| 225 | // If true, only a single item can be expanded at any given time. |
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| 226 | onlyOpenOne: false, |
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| 227 | |
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| 228 | generateResults: function(items){ |
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| 229 | // summary: |
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| 230 | // Generates a list of items, and places an icon beside them that |
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| 231 | // can be used to show or hide a summary of that item. |
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| 232 | |
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| 233 | var store = this.store; |
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| 234 | var iconCls = "dojoxPortletToggleIcon"; |
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| 235 | var collapsedCls = "dojoxPortletItemCollapsed"; |
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| 236 | var expandedCls = "dojoxPortletItemOpen"; |
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| 237 | |
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| 238 | var timer; |
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| 239 | var ul = (this._resultList = dojo.create("ul", { |
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| 240 | "class": "dojoxFeedPortletExpandableList" |
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| 241 | }, this.containerNode)); |
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| 242 | |
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| 243 | // Create the LI elements. Each LI has two DIV elements, the |
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| 244 | // top DIV contains the toggle icon and title, and the bottom |
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| 245 | // div contains the extended summary. |
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| 246 | dojo.forEach(items, dojo.hitch(this, dojo.hitch(this, function(item){ |
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| 247 | var li = dojo.create("li", {"class": collapsedCls}, ul); |
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| 248 | var upper = dojo.create("div", {style: "width: 100%;"}, li); |
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| 249 | var lower = dojo.create("div", {"class": "dojoxPortletItemSummary", innerHTML: this._getContent(item)}, li); |
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| 250 | dojo.create("span", { |
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| 251 | "class": iconCls, |
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| 252 | innerHTML: "<img src='" + dojo.config.baseUrl + "/resources/blank.gif'>"}, upper); |
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| 253 | var a = dojo.create("a", {href: this._getLink(item), innerHTML: this._getTitle(item) }, upper); |
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| 254 | |
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| 255 | if(this.openNew){ |
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| 256 | dojo.attr(a, "target", "_blank"); |
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| 257 | } |
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| 258 | }))); |
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| 259 | |
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| 260 | // Catch all clicks on the list. If a toggle icon is clicked, |
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| 261 | // toggle the visible state of the summary DIV. |
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| 262 | dojo.connect(ul, "onclick", dojo.hitch(this, function(evt){ |
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| 263 | if(dojo.hasClass(evt.target, iconCls) || dojo.hasClass(evt.target.parentNode, iconCls)){ |
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| 264 | dojo.stopEvent(evt); |
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| 265 | var li = evt.target.parentNode; |
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| 266 | while(li.tagName != "LI"){ |
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| 267 | li = li.parentNode; |
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| 268 | } |
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| 269 | if(this.onlyOpenOne){ |
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| 270 | dojo.query("li", ul).filter(function(item){ |
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| 271 | return item != li; |
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| 272 | }).removeClass(expandedCls).addClass(collapsedCls); |
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| 273 | } |
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| 274 | var isExpanded = dojo.hasClass(li, expandedCls); |
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| 275 | dojo.toggleClass(li, expandedCls, !isExpanded); |
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| 276 | dojo.toggleClass(li, collapsedCls, isExpanded); |
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| 277 | } |
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| 278 | })); |
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| 279 | } |
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| 280 | }); |
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| 281 | |
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| 282 | |
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| 283 | dojo.declare("dojox.widget.PortletFeedSettings", |
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| 284 | dojox.widget.PortletSettings, { |
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| 285 | |
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| 286 | // summary: |
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| 287 | // A Settings widget designed to be used with a dojox.widget.FeedPortlet |
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| 288 | // description: |
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| 289 | // It provides form items that the user can use to change the URL |
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| 290 | // for a feed to load into the FeedPortlet. |
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| 291 | // There are two forms that it can take. |
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| 292 | // |
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| 293 | // The first is to display a text field, with Load and Cancel buttons, |
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| 294 | // which is prepopulated with the enclosing FeedPortlet's URL. |
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| 295 | // If a `<select>` DOM node is used as the source node for this widget, |
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| 296 | // it displays a list of predefined URLs that the user can select from |
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| 297 | // to load into the enclosing FeedPortlet. |
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| 298 | // |
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| 299 | // example: |
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| 300 | // | <div dojoType="dojox.widget.PortletFeedSettings"></div> |
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| 301 | // |
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| 302 | // example: |
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| 303 | // | <select dojoType="dojox.widget.PortletFeedSettings"> |
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| 304 | // | <option>http://www.dojotoolkit.org/aggregator/rss</option> |
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| 305 | // | <option>http://dojocampus.org/content/category/podcast/feed/</option> |
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| 306 | // | </select> |
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| 307 | |
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| 308 | "class" : "dojoxPortletFeedSettings", |
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| 309 | |
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| 310 | // urls: Array |
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| 311 | // An array of JSON object specifying URLs to display in the |
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| 312 | // PortletFeedSettings object. Each object contains a 'url' and 'label' |
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| 313 | // attribute, e.g. |
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| 314 | // [{url:'http:google.com', label:'Google'}, {url:'http://dojotoolkit.org', label: 'Dojo'}] |
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| 315 | urls: null, |
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| 316 | |
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| 317 | // selectedIndex: Number |
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| 318 | // The selected URL. Defaults to zero. |
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| 319 | selectedIndex: 0, |
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| 320 | |
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| 321 | buildRendering: function(){ |
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| 322 | // If JSON URLs have been specified, create a SELECT DOM node, |
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| 323 | // and insert the required OPTION elements. |
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| 324 | var s; |
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| 325 | if(this.urls && this.urls.length > 0){ |
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| 326 | console.log(this.id + " -> creating select with urls ", this.urls) |
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| 327 | s = dojo.create("select"); |
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| 328 | if(this.srcNodeRef){ |
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| 329 | dojo.place(s, this.srcNodeRef, "before"); |
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| 330 | dojo.destroy(this.srcNodeRef); |
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| 331 | } |
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| 332 | this.srcNodeRef = s; |
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| 333 | dojo.forEach(this.urls, function(url){ |
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| 334 | dojo.create("option", {value: url.url || url, innerHTML: url.label || url}, s); |
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| 335 | }); |
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| 336 | } |
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| 337 | |
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| 338 | // If the srcNodeRef is a SELECT node, then replace it with a DIV, and insert |
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| 339 | // the SELECT node into that div. |
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| 340 | if(this.srcNodeRef.tagName == "SELECT"){ |
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| 341 | this.text = this.srcNodeRef; |
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| 342 | var div = dojo.create("div", {}, this.srcNodeRef, "before"); |
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| 343 | div.appendChild(this.text); |
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| 344 | this.srcNodeRef = div; |
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| 345 | dojo.query("option", this.text).filter("return !item.value;").forEach("item.value = item.innerHTML"); |
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| 346 | if(!this.text.value){ |
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| 347 | if(this.content && this.text.options.length == 0){ |
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| 348 | this.text.appendChild(this.content); |
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| 349 | } |
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| 350 | dojo.attr(s || this.text, "value", this.text.options[this.selectedIndex].value); |
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| 351 | } |
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| 352 | } |
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| 353 | this.inherited(arguments); |
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| 354 | }, |
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| 355 | |
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| 356 | _setContentAttr: function(){ |
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| 357 | |
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| 358 | }, |
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| 359 | |
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| 360 | postCreate: function(){ |
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| 361 | console.log(this.id + " -> postCreate"); |
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| 362 | if(!this.text){ |
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| 363 | // If a select node is not being used, create a new TextBox to |
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| 364 | // edit the URL. |
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| 365 | var text = this.text = new dijit.form.TextBox({}); |
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| 366 | dojo.create("span", { |
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| 367 | innerHTML: "Choose Url: " |
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| 368 | }, this.domNode); |
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| 369 | this.addChild(text); |
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| 370 | } |
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| 371 | |
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| 372 | // Add a LOAD button |
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| 373 | this.addChild(new dijit.form.Button({ |
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| 374 | label: "Load", |
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| 375 | onClick: dojo.hitch(this, function(){ |
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| 376 | // Set the URL of the containing Portlet with the selected URL. |
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| 377 | this.portlet.attr("url", |
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| 378 | (this.text.tagName == "SELECT") ? this.text.value : this.text.attr('value')); |
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| 379 | if(this.text.tagName == "SELECT"){ |
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| 380 | // Set the selected index on the Select node. |
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| 381 | dojo.some(this.text.options, dojo.hitch(this, function(opt, idx){ |
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| 382 | if(opt.selected){ |
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| 383 | this.set("selectedIndex", idx); |
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| 384 | return true; |
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| 385 | } |
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| 386 | return false; |
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| 387 | })); |
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| 388 | } |
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| 389 | // Hide the widget. |
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| 390 | this.toggle(); |
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| 391 | }) |
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| 392 | })); |
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| 393 | |
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| 394 | // Add a CANCEL button, which hides this widget |
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| 395 | this.addChild(new dijit.form.Button({ |
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| 396 | label: "Cancel", |
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| 397 | onClick: dojo.hitch(this, "toggle") |
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| 398 | })); |
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| 399 | this.inherited(arguments); |
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| 400 | }, |
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| 401 | |
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| 402 | startup: function(){ |
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| 403 | // summary: |
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| 404 | // Sets the portlet associated with this PortletSettings object. |
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| 405 | if(this._started){return;} |
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| 406 | console.log(this.id + " -> startup"); |
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| 407 | this.inherited(arguments); |
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| 408 | |
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| 409 | if(!this.portlet){ |
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| 410 | throw Error(this.declaredClass + ": A PortletFeedSettings widget cannot exist without a Portlet."); |
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| 411 | } |
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| 412 | if(this.text.tagName == "SELECT"){ |
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| 413 | // Set the initial selected option. |
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| 414 | dojo.forEach(this.text.options, dojo.hitch(this, function(opt, index){ |
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| 415 | dojo.attr(opt, "selected", index == this.selectedIndex); |
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| 416 | })); |
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| 417 | } |
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| 418 | var url = this.portlet.attr("url"); |
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| 419 | if(url){ |
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| 420 | // If a SELECT node is used to choose a URL, ensure that the Portlet's URL |
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| 421 | // is one of the options. |
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| 422 | if(this.text.tagName == "SELECT"){ |
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| 423 | if(!this.urls && dojo.query("option[value='" + url + "']", this.text).length < 1){ |
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| 424 | dojo.place(dojo.create("option", { |
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| 425 | value: url, |
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| 426 | innerHTML: url, |
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| 427 | selected: "true" |
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| 428 | }), this.text, "first"); |
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| 429 | } |
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| 430 | }else{ |
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| 431 | this.text.attr("value", url); |
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| 432 | } |
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| 433 | }else{ |
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| 434 | this.portlet.attr("url", this.get("feedPortletUrl")); |
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| 435 | } |
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| 436 | }, |
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| 437 | |
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| 438 | _getFeedPortletUrlAttr: function(){ |
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| 439 | return this.text.value; |
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| 440 | } |
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| 441 | }); |
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