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