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annotate geotemco/lib/simile/ajax/simile-ajax-api.js @ 0:b12c99b7c3f0

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commit for previous development
author Zoe Hong <zhong@mpiwg-berlin.mpg.de>
date Mon, 19 Jan 2015 17:13:49 +0100
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1 /*==================================================
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2 * Simile Ajax API
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3 *==================================================
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4 */
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5
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6 if (typeof SimileAjax == "undefined") {
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7 var isCompiled = ("SimileAjax_isCompiled" in window) && window.SimileAjax_isCompiled;
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8
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9 var SimileAjax = {
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10 loaded: false,
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11 loadingScriptsCount: 0,
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12 error: null,
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13 params: { bundle:"true" }
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14 };
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15
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16 SimileAjax.Platform = new Object();
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17 /*
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18 HACK: We need these 2 things here because we cannot simply append
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19 a <script> element containing code that accesses SimileAjax.Platform
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20 to initialize it because IE executes that <script> code first
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21 before it loads ajax.js and platform.js.
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22 */
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23
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24 var getHead = function(doc) {
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25 return doc.getElementsByTagName("head")[0];
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26 };
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27
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28 SimileAjax.findScript = function(doc, substring) {
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29 var scripts=doc.documentElement.getElementsByTagName("script");
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30 for (s=0; s<scripts.length;s++) {
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31 var url = scripts[s].src;
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32 var i = url.indexOf(substring);
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33 if (i >= 0) {
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34 return url;
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35 }
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36 }
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37
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38 var heads = doc.documentElement.getElementsByTagName("head");
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39 for (var h = 0; h < heads.length; h++) {
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40 var node = heads[h].firstChild;
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41 while (node != null) {
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42 if (node.nodeType == 1 && node.tagName.toLowerCase() == "script") {
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43 var url = node.src;
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44 var i = url.indexOf(substring);
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45 if (i >= 0) {
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46 return url;
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47 }
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48 }
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49 node = node.nextSibling;
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50 }
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51 }
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52 return null;
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53 };
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54
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55 SimileAjax.includeJavascriptFile = function(doc, url, onerror, charset, callback) {
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56 onerror = onerror || "";
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57 if (doc.body == null) {
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58 try {
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59 var q = "'" + onerror.replace( /'/g, '&apos' ) + "'"; // "
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60 doc.write("<script src='" + url + "' onerror="+ q +
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61 (charset ? " charset='"+ charset +"'" : "") +
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62 " type='text/javascript'>"+ onerror + "</script>");
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63 return;
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64 } catch (e) {
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65 // fall through
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66 }
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67 }
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68
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69 var calledBack = false;
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70 var callbackOnce = function() {
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71 if (callback && !calledBack) {
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72 calledBack=true;
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73 callback();
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74 }
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75 }
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76 var script = doc.createElement("script");
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77 if (onerror) {
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78 try { script.innerHTML = onerror; } catch(e) {};
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79 script.onerror = function () {onerror(); callbackOnce()};
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80 }
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81 else {
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82 script.onerror = callbackOnce;
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83 }
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84 if (charset) {
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85 script.setAttribute("charset", charset);
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86 }
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87 script.type = "text/javascript";
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88 script.language = "JavaScript";
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89 script.src = url;
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90 if (callback)
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91 script.onload = script.onreadystatechange = function() {
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92 if (!this.readyState || this.readyState == "loaded" ||
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93 this.readyState == "complete")
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94 callbackOnce();
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95 }
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96 return getHead(doc).appendChild(script);
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97 };
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98
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99 function includeJavascriptList(doc, urlPrefix, filenames, included, index, callback) {
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100 if (!included[index]) { // avoid duplicate callback
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101 included[index] = true;
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102 if (index<filenames.length) {
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103 var nextCall=function(){
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104 includeJavascriptList(doc, urlPrefix, filenames,
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105 included, index+1, callback);
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106 }
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107 SimileAjax.
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108 includeJavascriptFile(doc,
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109 urlPrefix + filenames[index], null, null,
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110 nextCall);
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111 }
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112 else if (callback != null) callback();
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113 }
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114 }
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115
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116 SimileAjax.includeJavascriptFiles = function(doc, urlPrefix, filenames) {
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117 if (doc.body == null) {
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118 for (var i = 0; i < filenames.length; i++) {
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119 SimileAjax.includeJavascriptFile(doc, urlPrefix + filenames[i]);
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120 }
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121 SimileAjax.loadingScriptsCount += filenames.length;
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122 SimileAjax.includeJavascriptFile(doc, SimileAjax.urlPrefix + "scripts/signal.js?" + filenames.length);
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123 }
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124 else {
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125 var included = new Array();
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126 for (var i = 0; i < filenames.length; i++)
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127 included[i] = false;
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128
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129 if (typeof window.SimileAjax_onLoad == "string")
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130 f = eval(window.SimileAjax_onLoad);
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131 else if (typeof window.SimileAjax_onLoad == "function")
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132 f = window.SimileAjax_onLoad;
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133
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134 window.SimileAjax_onLoad = null;
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135 includeJavascriptList(doc, urlPrefix, filenames, included, 0, f);
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136 }
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137 };
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138
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139 SimileAjax.includeCssFile = function(doc, url) {
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140 if (doc.body == null) {
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141 try {
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142 doc.write("<link rel='stylesheet' href='" + url + "' type='text/css'/>");
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143 return;
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144 } catch (e) {
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145 // fall through
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146 }
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147 }
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148
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149 var link = doc.createElement("link");
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150 link.setAttribute("rel", "stylesheet");
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151 link.setAttribute("type", "text/css");
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152 link.setAttribute("href", url);
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153 getHead(doc).appendChild(link);
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154 };
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155 SimileAjax.includeCssFiles = function(doc, urlPrefix, filenames) {
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156 for (var i = 0; i < filenames.length; i++) {
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157 SimileAjax.includeCssFile(doc, urlPrefix + filenames[i]);
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158 }
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159 };
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160
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161 /**
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162 * Append into urls each string in suffixes after prefixing it with urlPrefix.
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163 * @param {Array} urls
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164 * @param {String} urlPrefix
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165 * @param {Array} suffixes
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166 */
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167 SimileAjax.prefixURLs = function(urls, urlPrefix, suffixes) {
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168 for (var i = 0; i < suffixes.length; i++) {
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169 urls.push(urlPrefix + suffixes[i]);
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170 }
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171 };
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172
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173 /**
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174 * Parse out the query parameters from a URL
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175 * @param {String} url the url to parse, or location.href if undefined
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176 * @param {Object} to optional object to extend with the parameters
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177 * @param {Object} types optional object mapping keys to value types
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178 * (String, Number, Boolean or Array, String by default)
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179 * @return a key/value Object whose keys are the query parameter names
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180 * @type Object
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181 */
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182 SimileAjax.parseURLParameters = function(url, to, types) {
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183 to = to || {};
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184 types = types || {};
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185
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186 if (typeof url == "undefined") {
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187 url = location.href;
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188 }
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189 var q = url.indexOf("?");
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190 if (q < 0) {
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191 return to;
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192 }
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193 url = (url+"#").slice(q+1, url.indexOf("#")); // toss the URL fragment
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194
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195 var params = url.split("&"), param, parsed = {};
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196 var decode = window.decodeURIComponent || unescape;
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197 for (var i = 0; param = params[i]; i++) {
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198 var eq = param.indexOf("=");
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199 var name = decode(param.slice(0,eq));
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200 var old = parsed[name];
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201 var replacement = decode(param.slice(eq+1));
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202
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203 if (typeof old == "undefined") {
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204 old = [];
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205 } else if (!(old instanceof Array)) {
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206 old = [old];
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207 }
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208 parsed[name] = old.concat(replacement);
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209 }
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210 for (var i in parsed) {
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211 if (!parsed.hasOwnProperty(i)) continue;
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212 var type = types[i] || String;
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213 var data = parsed[i];
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214 if (!(data instanceof Array)) {
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215 data = [data];
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216 }
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217 if (type === Boolean && data[0] == "false") {
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218 to[i] = false; // because Boolean("false") === true
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219 } else {
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220 to[i] = type.apply(this, data);
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221 }
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222 }
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223 return to;
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224 };
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225
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226 if (!isCompiled) {
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227 (function() {
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228 var javascriptFiles = [
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229 "platform.js",
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230 "debug.js",
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231 "xmlhttp.js",
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232 "json.js",
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233 "dom.js",
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234 "graphics.js",
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235 "date-time.js",
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236 "string.js",
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237 "html.js",
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238 "data-structure.js",
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239 "units.js",
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240
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241 "ajax.js",
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242 "history.js",
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243 "window-manager.js",
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244 "remoteLog.js"
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245 ];
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246 var cssFiles = [
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247 "graphics.css"
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248 ];
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249 if (!("jQuery" in window) && !("$" in window)) {
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250 // javascriptFiles.unshift("jquery-1.4.2.min.js");
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251 SimileAjax.includeJavascriptFile(document, "http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js");
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252 }
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253
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254
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255 if (typeof SimileAjax_urlPrefix == "string") {
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256 SimileAjax.urlPrefix = SimileAjax_urlPrefix;
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257 } else {
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258 var url = SimileAjax.findScript(document, "simile-ajax-api.js");
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259 if (url == null) {
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260 SimileAjax.error = new Error("Failed to derive URL prefix for Simile Ajax API code files");
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261 return;
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262 }
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263
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264 SimileAjax.urlPrefix = url.substr(0, url.indexOf("simile-ajax-api.js"));
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265 SimileAjax.parseURLParameters(url, SimileAjax.params, { bundle: Boolean });
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266 }
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267
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268
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269
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270 if (!isCompiled) {
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271 if (SimileAjax.params.bundle) {
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272 SimileAjax.includeJavascriptFiles(document, SimileAjax.urlPrefix, [ "simile-ajax-bundle.js" ]);
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273 } else {
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274 SimileAjax.includeJavascriptFiles(document, SimileAjax.urlPrefix + "scripts/", javascriptFiles);
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275 }
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276 SimileAjax.includeCssFiles(document, SimileAjax.urlPrefix + "styles/", cssFiles);
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277 }
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278
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279 SimileAjax.loaded = true;
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280 })();
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281 }
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282 }