1 | define(["dojo/_base/declare", "dojo/_base/array", "dojo/_base/lang", "dojo/dom", "dojo/_base/xhr", "dojo/_base/kernel", |
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2 | "dojo/data/util/simpleFetch", "dojo/data/util/filter", "dojox/xml/parser"], |
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3 | function(declare, array, lang, dom, xhr, kernel, simpleFetch, filter, xmlParser) { |
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4 | |
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5 | var HtmlStore = declare("dojox.data.HtmlStore", null, { |
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6 | constructor: function(/*Object*/ args){ |
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7 | // summary: |
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8 | // Initializer for the HTML table store. |
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9 | // description: |
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10 | // The HtmlStore can be created in one of two ways: a) by parsing an existing |
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11 | // table or list DOM node on the current page or b) by referencing an external url and giving |
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12 | // the id of the table or list in that page. The remote url will be parsed as an html page. |
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13 | // |
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14 | // The HTML table or list should be of the following form: |
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15 | // |
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16 | // | <table id="myTable"> |
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17 | // | <thead> |
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18 | // | <tr> |
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19 | // | <th>Attribute1</th> |
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20 | // | <th>Attribute2</th> |
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21 | // | </tr> |
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22 | // | </thead> |
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23 | // | <tbody> |
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24 | // | <tr> |
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25 | // | <td>Value1.1</td> |
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26 | // | <td>Value1.2</td> |
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27 | // | </tr> |
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28 | // | <tr> |
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29 | // | <td>Value2.1</td> |
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30 | // | <td>Value2.2</td> |
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31 | // | </tr> |
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32 | // | </tbody> |
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33 | // | </table> |
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34 | // |
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35 | // -or- |
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36 | // |
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37 | // | <ul id="myUnorderedList"> |
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38 | // | <li>Value.1</li> |
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39 | // | <li>Value.2</li> |
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40 | // | </ul> |
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41 | // |
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42 | // -or- |
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43 | // |
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44 | // | <ol id="myOrderedList"> |
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45 | // | <li>Value.1</li> |
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46 | // | <li>Value.2</li> |
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47 | // | </ol> |
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48 | // |
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49 | // args: |
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50 | // An anonymous object to initialize properties. It expects the following values: |
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51 | // |
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52 | // - dataId: The id of the HTML table to use. |
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53 | // |
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54 | // OR |
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55 | // |
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56 | // - url: The url of the remote page to load |
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57 | // - dataId: The id of the table element in the remote page |
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58 | // |
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59 | // and the option: |
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60 | // |
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61 | // - trimWhitespace: Trim off any surrounding whitespace from the headers (attribute |
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62 | // names) and text content of the items in question. Default is false for |
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63 | // backwards compatibility. |
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64 | |
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65 | if(args && "urlPreventCache" in args){ |
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66 | this.urlPreventCache = args.urlPreventCache?true:false; |
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67 | } |
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68 | if(args && "trimWhitespace" in args){ |
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69 | this.trimWhitespace = args.trimWhitespace?true:false; |
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70 | } |
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71 | if(args.url){ |
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72 | if(!args.dataId){ |
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73 | throw new Error("dojo.data.HtmlStore: Cannot instantiate using url without an id!"); |
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74 | } |
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75 | this.url = args.url; |
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76 | this.dataId = args.dataId; |
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77 | }else{ |
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78 | if(args.dataId){ |
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79 | this.dataId = args.dataId; |
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80 | } |
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81 | } |
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82 | if(args && "fetchOnCreate" in args){ |
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83 | this.fetchOnCreate = args.fetchOnCreate?true:false; |
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84 | } |
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85 | if(this.fetchOnCreate && this.dataId){ |
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86 | this.fetch(); |
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87 | } |
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88 | }, |
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89 | |
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90 | // url: [public] string |
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91 | // The URL from which to load an HTML document for data loading |
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92 | url: "", |
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93 | |
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94 | // dataId: [public] string |
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95 | // The id in the document for an element from which to get the data. |
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96 | dataId: "", |
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97 | |
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98 | // trimWhitepace: [public] boolean |
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99 | // Boolean flag to denote if the store should trim whitepace around |
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100 | // header and data content of a node. This matters if reformatters |
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101 | // alter the white spacing around the tags. The default is false for |
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102 | // backwards compat. |
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103 | trimWhitespace: false, |
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104 | |
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105 | // urlPreventCache: [public] boolean |
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106 | // Flag to denote if peventCache should be used on xhrGet calls. |
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107 | urlPreventCache: false, |
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108 | |
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109 | // fetchOnCreate: [public] boolean |
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110 | // Flag to denote if it should try to load from a data id (nested in the page) |
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111 | // The moment the store is created, instead of waiting for first |
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112 | // fetch call. |
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113 | fetchOnCreate: false, |
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114 | |
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115 | _indexItems: function(){ |
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116 | // summary: |
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117 | // Function to index items found under the id. |
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118 | // tags: |
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119 | // private |
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120 | this._getHeadings(); |
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121 | if(this._rootNode.rows){//tables |
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122 | if(this._rootNode.tBodies && this._rootNode.tBodies.length > 0){ |
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123 | this._rootNode = this._rootNode.tBodies[0]; |
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124 | } |
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125 | var i; |
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126 | for(i=0; i<this._rootNode.rows.length; i++){ |
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127 | this._rootNode.rows[i]._ident = i+1; |
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128 | } |
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129 | }else{//lists |
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130 | var c=1; |
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131 | for(i=0; i<this._rootNode.childNodes.length; i++){ |
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132 | if(this._rootNode.childNodes[i].nodeType === 1){ |
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133 | this._rootNode.childNodes[i]._ident = c; |
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134 | c++; |
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135 | } |
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136 | } |
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137 | } |
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138 | }, |
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139 | |
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140 | _getHeadings: function(){ |
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141 | // summary: |
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142 | // Function to load the attribute names from the table header so that the |
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143 | // attributes (cells in a row), can have a reasonable name. |
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144 | // For list items, returns single implicit heading, ["name"] |
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145 | this._headings = []; |
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146 | if(this._rootNode.tHead){ |
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147 | array.forEach(this._rootNode.tHead.rows[0].cells, lang.hitch(this, function(th){ |
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148 | var text = xmlParser.textContent(th); |
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149 | this._headings.push(this.trimWhitespace?lang.trim(text):text); |
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150 | })); |
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151 | }else{ |
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152 | this._headings = ["name"]; |
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153 | } |
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154 | }, |
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155 | |
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156 | _getAllItems: function(){ |
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157 | // summary: |
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158 | // Function to return all rows in the table as an array of items. |
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159 | var items = []; |
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160 | var i; |
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161 | if(this._rootNode.rows){//table |
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162 | for(i=0; i<this._rootNode.rows.length; i++){ |
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163 | items.push(this._rootNode.rows[i]); |
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164 | } |
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165 | }else{ //list |
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166 | for(i=0; i<this._rootNode.childNodes.length; i++){ |
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167 | if(this._rootNode.childNodes[i].nodeType === 1){ |
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168 | items.push(this._rootNode.childNodes[i]); |
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169 | } |
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170 | } |
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171 | } |
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172 | return items; //array |
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173 | }, |
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174 | |
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175 | _assertIsItem: function(/* item */ item){ |
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176 | // summary: |
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177 | // This function tests whether the item passed in is indeed an item in the store. |
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178 | // item: |
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179 | // The item to test for being contained by the store. |
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180 | if(!this.isItem(item)){ |
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181 | throw new Error("dojo.data.HtmlStore: a function was passed an item argument that was not an item"); |
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182 | } |
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183 | }, |
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184 | |
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185 | _assertIsAttribute: function(/* String */ attribute){ |
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186 | // summary: |
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187 | // This function tests whether the item passed in is indeed a valid 'attribute' like type for the store. |
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188 | // attribute: |
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189 | // The attribute to test for being contained by the store. |
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190 | // returns: |
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191 | // Returns the index (column) that the attribute resides in the row. |
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192 | if(typeof attribute !== "string"){ |
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193 | throw new Error("dojo.data.HtmlStore: a function was passed an attribute argument that was not an attribute name string"); |
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194 | } |
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195 | return array.indexOf(this._headings, attribute); //int |
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196 | }, |
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197 | |
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198 | /*************************************** |
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199 | dojo/data/api/Read API |
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200 | ***************************************/ |
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201 | |
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202 | getValue: function( /* item */ item, |
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203 | /* attribute-name-string */ attribute, |
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204 | /* value? */ defaultValue){ |
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205 | // summary: |
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206 | // See dojo/data/api/Read.getValue() |
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207 | var values = this.getValues(item, attribute); |
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208 | return (values.length > 0)?values[0]:defaultValue; // Object|Number|Boolean |
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209 | }, |
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210 | |
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211 | getValues: function(/* item */ item, |
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212 | /* attribute-name-string */ attribute){ |
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213 | // summary: |
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214 | // See dojo/data/api/Read.getValues() |
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215 | |
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216 | this._assertIsItem(item); |
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217 | var index = this._assertIsAttribute(attribute); |
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218 | if(index>-1){ |
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219 | var text; |
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220 | if(item.cells){ |
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221 | text = xmlParser.textContent(item.cells[index]); |
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222 | }else{//return Value for lists |
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223 | text = xmlParser.textContent(item); |
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224 | } |
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225 | return [this.trimWhitespace?lang.trim(text):text]; |
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226 | } |
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227 | return []; //Array |
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228 | }, |
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229 | |
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230 | getAttributes: function(/* item */ item){ |
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231 | // summary: |
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232 | // See dojo/data/api/Read.getAttributes() |
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233 | this._assertIsItem(item); |
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234 | var attributes = []; |
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235 | for(var i=0; i<this._headings.length; i++){ |
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236 | if(this.hasAttribute(item, this._headings[i])) |
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237 | attributes.push(this._headings[i]); |
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238 | } |
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239 | return attributes; //Array |
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240 | }, |
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241 | |
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242 | hasAttribute: function( /* item */ item, |
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243 | /* attribute-name-string */ attribute){ |
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244 | // summary: |
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245 | // See dojo/data/api/Read.hasAttribute() |
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246 | return this.getValues(item, attribute).length > 0; |
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247 | }, |
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248 | |
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249 | containsValue: function(/* item */ item, |
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250 | /* attribute-name-string */ attribute, |
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251 | /* anything */ value){ |
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252 | // summary: |
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253 | // See dojo/data/api/Read.containsValue() |
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254 | var regexp = undefined; |
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255 | if(typeof value === "string"){ |
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256 | regexp = filter.patternToRegExp(value, false); |
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257 | } |
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258 | return this._containsValue(item, attribute, value, regexp); //boolean. |
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259 | }, |
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260 | |
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261 | _containsValue: function( /* item */ item, |
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262 | /* attribute-name-string */ attribute, |
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263 | /* anything */ value, |
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264 | /* RegExp?*/ regexp){ |
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265 | // summary: |
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266 | // Internal function for looking at the values contained by the item. |
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267 | // description: |
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268 | // Internal function for looking at the values contained by the item. This |
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269 | // function allows for denoting if the comparison should be case sensitive for |
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270 | // strings or not (for handling filtering cases where string case should not matter) |
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271 | // item: |
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272 | // The data item to examine for attribute values. |
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273 | // attribute: |
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274 | // The attribute to inspect. |
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275 | // value: |
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276 | // The value to match. |
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277 | // regexp: |
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278 | // Optional regular expression generated off value if value was of string type to handle wildcarding. |
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279 | // If present and attribute values are string, then it can be used for comparison instead of 'value' |
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280 | var values = this.getValues(item, attribute); |
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281 | for(var i = 0; i < values.length; ++i){ |
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282 | var possibleValue = values[i]; |
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283 | if(typeof possibleValue === "string" && regexp){ |
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284 | return (possibleValue.match(regexp) !== null); |
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285 | }else{ |
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286 | //Non-string matching. |
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287 | if(value === possibleValue){ |
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288 | return true; // Boolean |
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289 | } |
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290 | } |
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291 | } |
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292 | return false; // Boolean |
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293 | }, |
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294 | |
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295 | isItem: function(/* anything */ something){ |
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296 | // summary: |
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297 | // See dojo/data/api/Read.isItem() |
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298 | return something && dom.isDescendant(something, this._rootNode); |
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299 | }, |
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300 | |
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301 | isItemLoaded: function(/* anything */ something){ |
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302 | // summary: |
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303 | // See dojo/data/api/Read.isItemLoaded() |
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304 | return this.isItem(something); |
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305 | }, |
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306 | |
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307 | loadItem: function(/* Object */ keywordArgs){ |
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308 | // summary: |
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309 | // See dojo/data/api/Read.loadItem() |
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310 | this._assertIsItem(keywordArgs.item); |
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311 | }, |
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312 | |
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313 | _fetchItems: function(request, fetchHandler, errorHandler){ |
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314 | // summary: |
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315 | // Fetch items (XML elements) that match to a query |
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316 | // description: |
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317 | // If '_fetchUrl' is specified, it is used to load an XML document |
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318 | // with a query string. |
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319 | // Otherwise and if 'url' is specified, the XML document is |
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320 | // loaded and list XML elements that match to a query (set of element |
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321 | // names and their text attribute values that the items to contain). |
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322 | // A wildcard, "*" can be used to query values to match all |
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323 | // occurrences. |
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324 | // If '_rootItem' is specified, it is used to fetch items. |
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325 | // request: |
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326 | // A request object |
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327 | // fetchHandler: |
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328 | // A function to call for fetched items |
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329 | // errorHandler: |
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330 | // A function to call on error |
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331 | |
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332 | if(this._rootNode){ |
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333 | this._finishFetchItems(request, fetchHandler, errorHandler); |
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334 | }else{ |
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335 | if(!this.url){ |
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336 | this._rootNode = dom.byId(this.dataId); |
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337 | this._indexItems(); |
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338 | this._finishFetchItems(request, fetchHandler, errorHandler); |
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339 | }else{ |
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340 | var getArgs = { |
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341 | url: this.url, |
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342 | handleAs: "text", |
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343 | preventCache: this.urlPreventCache |
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344 | }; |
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345 | var self = this; |
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346 | var getHandler = xhr.get(getArgs); |
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347 | getHandler.addCallback(function(data){ |
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348 | var findNode = function(node, id){ |
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349 | if(node.id == id){ |
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350 | return node; //object |
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351 | } |
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352 | if(node.childNodes){ |
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353 | for(var i=0; i<node.childNodes.length; i++){ |
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354 | var returnNode = findNode(node.childNodes[i], id); |
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355 | if(returnNode){ |
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356 | return returnNode; //object |
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357 | } |
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358 | } |
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359 | } |
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360 | return null; //null |
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361 | } |
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362 | |
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363 | var d = document.createElement("div"); |
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364 | d.innerHTML = data; |
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365 | self._rootNode = findNode(d, self.dataId); |
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366 | self._indexItems(); |
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367 | self._finishFetchItems(request, fetchHandler, errorHandler); |
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368 | }); |
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369 | getHandler.addErrback(function(error){ |
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370 | errorHandler(error, request); |
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371 | }); |
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372 | } |
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373 | } |
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374 | }, |
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375 | |
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376 | _finishFetchItems: function(request, fetchHandler, errorHandler){ |
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377 | // summary: |
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378 | // Internal function for processing the passed in request and locating the requested items. |
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379 | var items = []; |
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380 | var arrayOfAllItems = this._getAllItems(); |
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381 | if(request.query){ |
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382 | var ignoreCase = request.queryOptions ? request.queryOptions.ignoreCase : false; |
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383 | items = []; |
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384 | |
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385 | //See if there are any string values that can be regexp parsed first to avoid multiple regexp gens on the |
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386 | //same value for each item examined. Much more efficient. |
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387 | var regexpList = {}; |
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388 | var key; |
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389 | var value; |
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390 | for(key in request.query){ |
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391 | value = request.query[key]+''; |
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392 | if(typeof value === "string"){ |
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393 | regexpList[key] = filter.patternToRegExp(value, ignoreCase); |
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394 | } |
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395 | } |
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396 | |
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397 | for(var i = 0; i < arrayOfAllItems.length; ++i){ |
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398 | var match = true; |
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399 | var candidateItem = arrayOfAllItems[i]; |
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400 | for(key in request.query){ |
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401 | value = request.query[key]+''; |
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402 | if(!this._containsValue(candidateItem, key, value, regexpList[key])){ |
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403 | match = false; |
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404 | } |
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405 | } |
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406 | if(match){ |
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407 | items.push(candidateItem); |
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408 | } |
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409 | } |
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410 | fetchHandler(items, request); |
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411 | }else{ |
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412 | // We want a copy to pass back in case the parent wishes to sort the array. We shouldn't allow resort |
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413 | // of the internal list so that multiple callers can get listsand sort without affecting each other. |
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414 | if(arrayOfAllItems.length> 0){ |
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415 | items = arrayOfAllItems.slice(0,arrayOfAllItems.length); |
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416 | } |
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417 | fetchHandler(items, request); |
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418 | } |
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419 | }, |
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420 | |
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421 | getFeatures: function(){ |
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422 | // summary: |
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423 | // See dojo/data/api/Read.getFeatures() |
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424 | return { |
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425 | 'dojo.data.api.Read': true, |
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426 | 'dojo.data.api.Identity': true |
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427 | }; |
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428 | }, |
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429 | |
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430 | close: function(/*dojo/data/api/Request|Object?*/ request){ |
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431 | // summary: |
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432 | // See dojo/data/api/Read.close() |
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433 | |
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434 | // nothing to do here! |
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435 | }, |
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436 | |
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437 | getLabel: function(/* item */ item){ |
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438 | // summary: |
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439 | // See dojo/data/api/Read.getLabel() |
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440 | if(this.isItem(item)){ |
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441 | if(item.cells){ |
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442 | return "Item #" + this.getIdentity(item); |
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443 | }else{ |
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444 | return this.getValue(item,"name"); |
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445 | } |
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446 | } |
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447 | return undefined; |
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448 | }, |
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449 | |
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450 | getLabelAttributes: function(/* item */ item){ |
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451 | // summary: |
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452 | // See dojo/data/api/Read.getLabelAttributes() |
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453 | if(item.cells){ |
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454 | return null; |
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455 | }else{ |
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456 | return ["name"]; |
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457 | } |
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458 | }, |
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459 | |
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460 | /*************************************** |
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461 | dojo/data/api/Identity API |
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462 | ***************************************/ |
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463 | |
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464 | getIdentity: function(/* item */ item){ |
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465 | // summary: |
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466 | // See dojo/data/api/Identity.getIdentity() |
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467 | this._assertIsItem(item); |
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468 | if(this.hasAttribute(item, "name")){ |
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469 | return this.getValue(item,"name"); |
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470 | }else{ |
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471 | return item._ident; |
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472 | } |
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473 | }, |
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474 | |
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475 | getIdentityAttributes: function(/* item */ item){ |
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476 | // summary: |
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477 | // See dojo/data/api/Identity.getIdentityAttributes() |
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478 | |
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479 | //Identity isn't taken from a public attribute. |
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480 | return null; |
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481 | }, |
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482 | |
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483 | fetchItemByIdentity: function(keywordArgs){ |
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484 | // summary: |
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485 | // See dojo/data/api/Identity.fetchItemByIdentity() |
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486 | var identity = keywordArgs.identity; |
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487 | var self = this; |
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488 | var item = null; |
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489 | var scope = null; |
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490 | if(!this._rootNode){ |
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491 | if(!this.url){ |
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492 | this._rootNode = dom.byId(this.dataId); |
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493 | this._indexItems(); |
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494 | if(self._rootNode.rows){ //Table |
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495 | item = this._rootNode.rows[identity + 1]; |
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496 | }else{ //Lists |
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497 | for(var i = 0; i < self._rootNode.childNodes.length; i++){ |
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498 | if(self._rootNode.childNodes[i].nodeType === 1 && identity === xmlParser.textContent(self._rootNode.childNodes[i])){ |
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499 | item = self._rootNode.childNodes[i]; |
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500 | } |
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501 | } |
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502 | } |
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503 | if(keywordArgs.onItem){ |
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504 | scope = keywordArgs.scope?keywordArgs.scope:kernel.global; |
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505 | keywordArgs.onItem.call(scope, item); |
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506 | } |
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507 | |
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508 | }else{ |
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509 | var getArgs = { |
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510 | url: this.url, |
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511 | handleAs: "text" |
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512 | }; |
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513 | var getHandler = xhr.get(getArgs); |
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514 | getHandler.addCallback(function(data){ |
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515 | var findNode = function(node, id){ |
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516 | if(node.id == id){ |
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517 | return node; //object |
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518 | } |
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519 | if(node.childNodes){ |
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520 | for(var i=0; i<node.childNodes.length; i++){ |
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521 | var returnNode = findNode(node.childNodes[i], id); |
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522 | if(returnNode){ |
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523 | return returnNode; //object |
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524 | } |
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525 | } |
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526 | } |
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527 | return null; //null |
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528 | } |
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529 | var d = document.createElement("div"); |
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530 | d.innerHTML = data; |
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531 | self._rootNode = findNode(d, self.dataId); |
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532 | self._indexItems(); |
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533 | if(self._rootNode.rows && identity <= self._rootNode.rows.length){ //Table |
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534 | item = self._rootNode.rows[identity-1]; |
---|
535 | }else{ //List |
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536 | for(var i = 0; i < self._rootNode.childNodes.length; i++){ |
---|
537 | if(self._rootNode.childNodes[i].nodeType === 1 && identity === xmlParser.textContent(self._rootNode.childNodes[i])){ |
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538 | item = self._rootNode.childNodes[i]; |
---|
539 | break; |
---|
540 | } |
---|
541 | } |
---|
542 | } |
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543 | if(keywordArgs.onItem){ |
---|
544 | scope = keywordArgs.scope?keywordArgs.scope:kernel.global; |
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545 | keywordArgs.onItem.call(scope, item); |
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546 | } |
---|
547 | }); |
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548 | getHandler.addErrback(function(error){ |
---|
549 | if(keywordArgs.onError){ |
---|
550 | scope = keywordArgs.scope?keywordArgs.scope:kernel.global; |
---|
551 | keywordArgs.onError.call(scope, error); |
---|
552 | |
---|
553 | } |
---|
554 | }); |
---|
555 | } |
---|
556 | }else{ |
---|
557 | if(this._rootNode.rows[identity+1]){ |
---|
558 | item = this._rootNode.rows[identity+1]; |
---|
559 | if(keywordArgs.onItem){ |
---|
560 | scope = keywordArgs.scope?keywordArgs.scope:kernel.global; |
---|
561 | keywordArgs.onItem.call(scope, item); |
---|
562 | } |
---|
563 | } |
---|
564 | } |
---|
565 | } |
---|
566 | }); |
---|
567 | lang.extend(HtmlStore, simpleFetch); |
---|
568 | return HtmlStore; |
---|
569 | }); |
---|