selenium-webdriver

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The official WebDriver JavaScript bindings from the Selenium project

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<!DOCTYPE html><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"><meta http-equiv="Content-Language" content="en"><meta http-equiv="X-UA-Compatible" content="IE=edge"><title>debug.js</title><link href="../../../../dossier.css" rel="stylesheet" type="text/css"><header><div><form><div><input type="search" placeholder="Search" tabindex="1"></div></form></div></header><main><article class="srcfile"><h1>lib/goog/debug/debug.js</h1><div><table><tr><td><a id="l1"></a><a href="#l1">1</a><td>// Copyright 2006 The Closure Library Authors. All Rights Reserved.<tr><td><a id="l2"></a><a href="#l2">2</a><td>//<tr><td><a id="l3"></a><a href="#l3">3</a><td>// Licensed under the Apache License, Version 2.0 (the "License");<tr><td><a id="l4"></a><a href="#l4">4</a><td>// you may not use this file except in compliance with the License.<tr><td><a id="l5"></a><a href="#l5">5</a><td>// You may obtain a copy of the License at<tr><td><a id="l6"></a><a href="#l6">6</a><td>//<tr><td><a id="l7"></a><a href="#l7">7</a><td>// http://www.apache.org/licenses/LICENSE-2.0<tr><td><a id="l8"></a><a href="#l8">8</a><td>//<tr><td><a id="l9"></a><a href="#l9">9</a><td>// Unless required by applicable law or agreed to in writing, software<tr><td><a id="l10"></a><a href="#l10">10</a><td>// distributed under the License is distributed on an "AS-IS" BASIS,<tr><td><a id="l11"></a><a href="#l11">11</a><td>// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<tr><td><a id="l12"></a><a href="#l12">12</a><td>// See the License for the specific language governing permissions and<tr><td><a id="l13"></a><a href="#l13">13</a><td>// limitations under the License.<tr><td><a id="l14"></a><a href="#l14">14</a><td><tr><td><a id="l15"></a><a href="#l15">15</a><td>/**<tr><td><a id="l16"></a><a href="#l16">16</a><td> * @fileoverview Logging and debugging utilities.<tr><td><a id="l17"></a><a href="#l17">17</a><td> *<tr><td><a id="l18"></a><a href="#l18">18</a><td> * @see ../demos/debug.html<tr><td><a id="l19"></a><a href="#l19">19</a><td> */<tr><td><a id="l20"></a><a href="#l20">20</a><td><tr><td><a id="l21"></a><a href="#l21">21</a><td>goog.provide('goog.debug');<tr><td><a id="l22"></a><a href="#l22">22</a><td><tr><td><a id="l23"></a><a href="#l23">23</a><td>goog.require('goog.array');<tr><td><a id="l24"></a><a href="#l24">24</a><td>goog.require('goog.html.SafeHtml');<tr><td><a id="l25"></a><a href="#l25">25</a><td>goog.require('goog.html.SafeUrl');<tr><td><a id="l26"></a><a href="#l26">26</a><td>goog.require('goog.html.uncheckedconversions');<tr><td><a id="l27"></a><a href="#l27">27</a><td>goog.require('goog.string.Const');<tr><td><a id="l28"></a><a href="#l28">28</a><td>goog.require('goog.structs.Set');<tr><td><a id="l29"></a><a href="#l29">29</a><td>goog.require('goog.userAgent');<tr><td><a id="l30"></a><a href="#l30">30</a><td><tr><td><a id="l31"></a><a href="#l31">31</a><td><tr><td><a id="l32"></a><a href="#l32">32</a><td>/** @define {boolean} Whether logging should be enabled. */<tr><td><a id="l33"></a><a href="#l33">33</a><td>goog.define('goog.debug.LOGGING_ENABLED', goog.DEBUG);<tr><td><a id="l34"></a><a href="#l34">34</a><td><tr><td><a id="l35"></a><a href="#l35">35</a><td><tr><td><a id="l36"></a><a href="#l36">36</a><td>/**<tr><td><a id="l37"></a><a href="#l37">37</a><td> * Catches onerror events fired by windows and similar objects.<tr><td><a id="l38"></a><a href="#l38">38</a><td> * @param {function(Object)} logFunc The function to call with the error<tr><td><a id="l39"></a><a href="#l39">39</a><td> * information.<tr><td><a id="l40"></a><a href="#l40">40</a><td> * @param {boolean=} opt_cancel Whether to stop the error from reaching the<tr><td><a id="l41"></a><a href="#l41">41</a><td> * browser.<tr><td><a id="l42"></a><a href="#l42">42</a><td> * @param {Object=} opt_target Object that fires onerror events.<tr><td><a id="l43"></a><a href="#l43">43</a><td> */<tr><td><a id="l44"></a><a href="#l44">44</a><td>goog.debug.catchErrors = function(logFunc, opt_cancel, opt_target) {<tr><td><a id="l45"></a><a href="#l45">45</a><td> var target = opt_target || goog.global;<tr><td><a id="l46"></a><a href="#l46">46</a><td> var oldErrorHandler = target.onerror;<tr><td><a id="l47"></a><a href="#l47">47</a><td> var retVal = !!opt_cancel;<tr><td><a id="l48"></a><a href="#l48">48</a><td><tr><td><a id="l49"></a><a href="#l49">49</a><td> // Chrome interprets onerror return value backwards (http://crbug.com/92062)<tr><td><a id="l50"></a><a href="#l50">50</a><td> // until it was fixed in webkit revision r94061 (Webkit 535.3). This<tr><td><a id="l51"></a><a href="#l51">51</a><td> // workaround still needs to be skipped in Safari after the webkit change<tr><td><a id="l52"></a><a href="#l52">52</a><td> // gets pushed out in Safari.<tr><td><a id="l53"></a><a href="#l53">53</a><td> // See https://bugs.webkit.org/show_bug.cgi?id=67119<tr><td><a id="l54"></a><a href="#l54">54</a><td> if (goog.userAgent.WEBKIT &&<tr><td><a id="l55"></a><a href="#l55">55</a><td> !goog.userAgent.isVersionOrHigher('535.3')) {<tr><td><a id="l56"></a><a href="#l56">56</a><td> retVal = !retVal;<tr><td><a id="l57"></a><a href="#l57">57</a><td> }<tr><td><a id="l58"></a><a href="#l58">58</a><td><tr><td><a id="l59"></a><a href="#l59">59</a><td> /**<tr><td><a id="l60"></a><a href="#l60">60</a><td> * New onerror handler for this target. This onerror handler follows the spec<tr><td><a id="l61"></a><a href="#l61">61</a><td> * according to<tr><td><a id="l62"></a><a href="#l62">62</a><td> * http://www.whatwg.org/specs/web-apps/current-work/#runtime-script-errors<tr><td><a id="l63"></a><a href="#l63">63</a><td> * The spec was changed in August 2013 to support receiving column information<tr><td><a id="l64"></a><a href="#l64">64</a><td> * and an error object for all scripts on the same origin or cross origin<tr><td><a id="l65"></a><a href="#l65">65</a><td> * scripts with the proper headers. See<tr><td><a id="l66"></a><a href="#l66">66</a><td> * https://mikewest.org/2013/08/debugging-runtime-errors-with-window-onerror<tr><td><a id="l67"></a><a href="#l67">67</a><td> *<tr><td><a id="l68"></a><a href="#l68">68</a><td> * @param {string} message The error message. For cross-origin errors, this<tr><td><a id="l69"></a><a href="#l69">69</a><td> * will be scrubbed to just "Script error.". For new browsers that have<tr><td><a id="l70"></a><a href="#l70">70</a><td> * updated to follow the latest spec, errors that come from origins that<tr><td><a id="l71"></a><a href="#l71">71</a><td> * have proper cross origin headers will not be scrubbed.<tr><td><a id="l72"></a><a href="#l72">72</a><td> * @param {string} url The URL of the script that caused the error. The URL<tr><td><a id="l73"></a><a href="#l73">73</a><td> * will be scrubbed to "" for cross origin scripts unless the script has<tr><td><a id="l74"></a><a href="#l74">74</a><td> * proper cross origin headers and the browser has updated to the latest<tr><td><a id="l75"></a><a href="#l75">75</a><td> * spec.<tr><td><a id="l76"></a><a href="#l76">76</a><td> * @param {number} line The line number in the script that the error<tr><td><a id="l77"></a><a href="#l77">77</a><td> * occurred on.<tr><td><a id="l78"></a><a href="#l78">78</a><td> * @param {number=} opt_col The optional column number that the error<tr><td><a id="l79"></a><a href="#l79">79</a><td> * occurred on. Only browsers that have updated to the latest spec will<tr><td><a id="l80"></a><a href="#l80">80</a><td> * include this.<tr><td><a id="l81"></a><a href="#l81">81</a><td> * @param {Error=} opt_error The optional actual error object for this<tr><td><a id="l82"></a><a href="#l82">82</a><td> * error that should include the stack. Only browsers that have updated<tr><td><a id="l83"></a><a href="#l83">83</a><td> * to the latest spec will inlude this parameter.<tr><td><a id="l84"></a><a href="#l84">84</a><td> * @return {boolean} Whether to prevent the error from reaching the browser.<tr><td><a id="l85"></a><a href="#l85">85</a><td> */<tr><td><a id="l86"></a><a href="#l86">86</a><td> target.onerror = function(message, url, line, opt_col, opt_error) {<tr><td><a id="l87"></a><a href="#l87">87</a><td> if (oldErrorHandler) {<tr><td><a id="l88"></a><a href="#l88">88</a><td> oldErrorHandler(message, url, line, opt_col, opt_error);<tr><td><a id="l89"></a><a href="#l89">89</a><td> }<tr><td><a id="l90"></a><a href="#l90">90</a><td> logFunc({<tr><td><a id="l91"></a><a href="#l91">91</a><td> message: message,<tr><td><a id="l92"></a><a href="#l92">92</a><td> fileName: url,<tr><td><a id="l93"></a><a href="#l93">93</a><td> line: line,<tr><td><a id="l94"></a><a href="#l94">94</a><td> col: opt_col,<tr><td><a id="l95"></a><a href="#l95">95</a><td> error: opt_error<tr><td><a id="l96"></a><a href="#l96">96</a><td> });<tr><td><a id="l97"></a><a href="#l97">97</a><td> return retVal;<tr><td><a id="l98"></a><a href="#l98">98</a><td> };<tr><td><a id="l99"></a><a href="#l99">99</a><td>};<tr><td><a id="l100"></a><a href="#l100">100</a><td><tr><td><a id="l101"></a><a href="#l101">101</a><td><tr><td><a id="l102"></a><a href="#l102">102</a><td>/**<tr><td><a id="l103"></a><a href="#l103">103</a><td> * Creates a string representing an object and all its properties.<tr><td><a id="l104"></a><a href="#l104">104</a><td> * @param {Object|null|undefined} obj Object to expose.<tr><td><a id="l105"></a><a href="#l105">105</a><td> * @param {boolean=} opt_showFn Show the functions as well as the properties,<tr><td><a id="l106"></a><a href="#l106">106</a><td> * default is false.<tr><td><a id="l107"></a><a href="#l107">107</a><td> * @return {string} The string representation of {@code obj}.<tr><td><a id="l108"></a><a href="#l108">108</a><td> */<tr><td><a id="l109"></a><a href="#l109">109</a><td>goog.debug.expose = function(obj, opt_showFn) {<tr><td><a id="l110"></a><a href="#l110">110</a><td> if (typeof obj == 'undefined') {<tr><td><a id="l111"></a><a href="#l111">111</a><td> return 'undefined';<tr><td><a id="l112"></a><a href="#l112">112</a><td> }<tr><td><a id="l113"></a><a href="#l113">113</a><td> if (obj == null) {<tr><td><a id="l114"></a><a href="#l114">114</a><td> return 'NULL';<tr><td><a id="l115"></a><a href="#l115">115</a><td> }<tr><td><a id="l116"></a><a href="#l116">116</a><td> var str = [];<tr><td><a id="l117"></a><a href="#l117">117</a><td><tr><td><a id="l118"></a><a href="#l118">118</a><td> for (var x in obj) {<tr><td><a id="l119"></a><a href="#l119">119</a><td> if (!opt_showFn && goog.isFunction(obj[x])) {<tr><td><a id="l120"></a><a href="#l120">120</a><td> continue;<tr><td><a id="l121"></a><a href="#l121">121</a><td> }<tr><td><a id="l122"></a><a href="#l122">122</a><td> var s = x + ' = ';<tr><td><a id="l123"></a><a href="#l123">123</a><td> /** @preserveTry */<tr><td><a id="l124"></a><a href="#l124">124</a><td> try {<tr><td><a id="l125"></a><a href="#l125">125</a><td> s += obj[x];<tr><td><a id="l126"></a><a href="#l126">126</a><td> } catch (e) {<tr><td><a id="l127"></a><a href="#l127">127</a><td> s += '*** ' + e + ' ***';<tr><td><a id="l128"></a><a href="#l128">128</a><td> }<tr><td><a id="l129"></a><a href="#l129">129</a><td> str.push(s);<tr><td><a id="l130"></a><a href="#l130">130</a><td> }<tr><td><a id="l131"></a><a href="#l131">131</a><td> return str.join('\n');<tr><td><a id="l132"></a><a href="#l132">132</a><td>};<tr><td><a id="l133"></a><a href="#l133">133</a><td><tr><td><a id="l134"></a><a href="#l134">134</a><td><tr><td><a id="l135"></a><a href="#l135">135</a><td>/**<tr><td><a id="l136"></a><a href="#l136">136</a><td> * Creates a string representing a given primitive or object, and for an<tr><td><a id="l137"></a><a href="#l137">137</a><td> * object, all its properties and nested objects. WARNING: If an object is<tr><td><a id="l138"></a><a href="#l138">138</a><td> * given, it and all its nested objects will be modified. To detect reference<tr><td><a id="l139"></a><a href="#l139">139</a><td> * cycles, this method identifies objects using goog.getUid() which mutates the<tr><td><a id="l140"></a><a href="#l140">140</a><td> * object.<tr><td><a id="l141"></a><a href="#l141">141</a><td> * @param {*} obj Object to expose.<tr><td><a id="l142"></a><a href="#l142">142</a><td> * @param {boolean=} opt_showFn Also show properties that are functions (by<tr><td><a id="l143"></a><a href="#l143">143</a><td> * default, functions are omitted).<tr><td><a id="l144"></a><a href="#l144">144</a><td> * @return {string} A string representation of {@code obj}.<tr><td><a id="l145"></a><a href="#l145">145</a><td> */<tr><td><a id="l146"></a><a href="#l146">146</a><td>goog.debug.deepExpose = function(obj, opt_showFn) {<tr><td><a id="l147"></a><a href="#l147">147</a><td> var str = [];<tr><td><a id="l148"></a><a href="#l148">148</a><td><tr><td><a id="l149"></a><a href="#l149">149</a><td> var helper = function(obj, space, parentSeen) {<tr><td><a id="l150"></a><a href="#l150">150</a><td> var nestspace = space + ' ';<tr><td><a id="l151"></a><a href="#l151">151</a><td> var seen = new goog.structs.Set(parentSeen);<tr><td><a id="l152"></a><a href="#l152">152</a><td><tr><td><a id="l153"></a><a href="#l153">153</a><td> var indentMultiline = function(str) {<tr><td><a id="l154"></a><a href="#l154">154</a><td> return str.replace(/\n/g, '\n' + space);<tr><td><a id="l155"></a><a href="#l155">155</a><td> };<tr><td><a id="l156"></a><a href="#l156">156</a><td><tr><td><a id="l157"></a><a href="#l157">157</a><td> /** @preserveTry */<tr><td><a id="l158"></a><a href="#l158">158</a><td> try {<tr><td><a id="l159"></a><a href="#l159">159</a><td> if (!goog.isDef(obj)) {<tr><td><a id="l160"></a><a href="#l160">160</a><td> str.push('undefined');<tr><td><a id="l161"></a><a href="#l161">161</a><td> } else if (goog.isNull(obj)) {<tr><td><a id="l162"></a><a href="#l162">162</a><td> str.push('NULL');<tr><td><a id="l163"></a><a href="#l163">163</a><td> } else if (goog.isString(obj)) {<tr><td><a id="l164"></a><a href="#l164">164</a><td> str.push('"' + indentMultiline(obj) + '"');<tr><td><a id="l165"></a><a href="#l165">165</a><td> } else if (goog.isFunction(obj)) {<tr><td><a id="l166"></a><a href="#l166">166</a><td> str.push(indentMultiline(String(obj)));<tr><td><a id="l167"></a><a href="#l167">167</a><td> } else if (goog.isObject(obj)) {<tr><td><a id="l168"></a><a href="#l168">168</a><td> if (seen.contains(obj)) {<tr><td><a id="l169"></a><a href="#l169">169</a><td> str.push('*** reference loop detected ***');<tr><td><a id="l170"></a><a href="#l170">170</a><td> } else {<tr><td><a id="l171"></a><a href="#l171">171</a><td> seen.add(obj);<tr><td><a id="l172"></a><a href="#l172">172</a><td> str.push('{');<tr><td><a id="l173"></a><a href="#l173">173</a><td> for (var x in obj) {<tr><td><a id="l174"></a><a href="#l174">174</a><td> if (!opt_showFn && goog.isFunction(obj[x])) {<tr><td><a id="l175"></a><a href="#l175">175</a><td> continue;<tr><td><a id="l176"></a><a href="#l176">176</a><td> }<tr><td><a id="l177"></a><a href="#l177">177</a><td> str.push('\n');<tr><td><a id="l178"></a><a href="#l178">178</a><td> str.push(nestspace);<tr><td><a id="l179"></a><a href="#l179">179</a><td> str.push(x + ' = ');<tr><td><a id="l180"></a><a href="#l180">180</a><td> helper(obj[x], nestspace, seen);<tr><td><a id="l181"></a><a href="#l181">181</a><td> }<tr><td><a id="l182"></a><a href="#l182">182</a><td> str.push('\n' + space + '}');<tr><td><a id="l183"></a><a href="#l183">183</a><td> }<tr><td><a id="l184"></a><a href="#l184">184</a><td> } else {<tr><td><a id="l185"></a><a href="#l185">185</a><td> str.push(obj);<tr><td><a id="l186"></a><a href="#l186">186</a><td> }<tr><td><a id="l187"></a><a href="#l187">187</a><td> } catch (e) {<tr><td><a id="l188"></a><a href="#l188">188</a><td> str.push('*** ' + e + ' ***');<tr><td><a id="l189"></a><a href="#l189">189</a><td> }<tr><td><a id="l190"></a><a href="#l190">190</a><td> };<tr><td><a id="l191"></a><a href="#l191">191</a><td><tr><td><a id="l192"></a><a href="#l192">192</a><td> helper(obj, '', new goog.structs.Set());<tr><td><a id="l193"></a><a href="#l193">193</a><td> return str.join('');<tr><td><a id="l194"></a><a href="#l194">194</a><td>};<tr><td><a id="l195"></a><a href="#l195">195</a><td><tr><td><a id="l196"></a><a href="#l196">196</a><td><tr><td><a id="l197"></a><a href="#l197">197</a><td>/**<tr><td><a id="l198"></a><a href="#l198">198</a><td> * Recursively outputs a nested array as a string.<tr><td><a id="l199"></a><a href="#l199">199</a><td> * @param {Array<?>} arr The array.<tr><td><a id="l200"></a><a href="#l200">200</a><td> * @return {string} String representing nested array.<tr><td><a id="l201"></a><a href="#l201">201</a><td> */<tr><td><a id="l202"></a><a href="#l202">202</a><td>goog.debug.exposeArray = function(arr) {<tr><td><a id="l203"></a><a href="#l203">203</a><td> var str = [];<tr><td><a id="l204"></a><a href="#l204">204</a><td> for (var i = 0; i < arr.length; i++) {<tr><td><a id="l205"></a><a href="#l205">205</a><td> if (goog.isArray(arr[i])) {<tr><td><a id="l206"></a><a href="#l206">206</a><td> str.push(goog.debug.exposeArray(arr[i]));<tr><td><a id="l207"></a><a href="#l207">207</a><td> } else {<tr><td><a id="l208"></a><a href="#l208">208</a><td> str.push(arr[i]);<tr><td><a id="l209"></a><a href="#l209">209</a><td> }<tr><td><a id="l210"></a><a href="#l210">210</a><td> }<tr><td><a id="l211"></a><a href="#l211">211</a><td> return '[ ' + str.join(', ') + ' ]';<tr><td><a id="l212"></a><a href="#l212">212</a><td>};<tr><td><a id="l213"></a><a href="#l213">213</a><td><tr><td><a id="l214"></a><a href="#l214">214</a><td><tr><td><a id="l215"></a><a href="#l215">215</a><td>/**<tr><td><a id="l216"></a><a href="#l216">216</a><td> * Exposes an exception that has been caught by a try...catch and outputs the<tr><td><a id="l217"></a><a href="#l217">217</a><td> * error as HTML with a stack trace.<tr><td><a id="l218"></a><a href="#l218">218</a><td> * @param {Object} err Error object or string.<tr><td><a id="l219"></a><a href="#l219">219</a><td> * @param {Function=} opt_fn Optional function to start stack trace from.<tr><td><a id="l220"></a><a href="#l220">220</a><td> * @return {string} Details of exception, as HTML.<tr><td><a id="l221"></a><a href="#l221">221</a><td> */<tr><td><a id="l222"></a><a href="#l222">222</a><td>goog.debug.exposeException = function(err, opt_fn) {<tr><td><a id="l223"></a><a href="#l223">223</a><td> var html = goog.debug.exposeExceptionAsHtml(err, opt_fn);<tr><td><a id="l224"></a><a href="#l224">224</a><td> return goog.html.SafeHtml.unwrap(html);<tr><td><a id="l225"></a><a href="#l225">225</a><td>};<tr><td><a id="l226"></a><a href="#l226">226</a><td><tr><td><a id="l227"></a><a href="#l227">227</a><td><tr><td><a id="l228"></a><a href="#l228">228</a><td>/**<tr><td><a id="l229"></a><a href="#l229">229</a><td> * Exposes an exception that has been caught by a try...catch and outputs the<tr><td><a id="l230"></a><a href="#l230">230</a><td> * error with a stack trace.<tr><td><a id="l231"></a><a href="#l231">231</a><td> * @param {Object} err Error object or string.<tr><td><a id="l232"></a><a href="#l232">232</a><td> * @param {Function=} opt_fn Optional function to start stack trace from.<tr><td><a id="l233"></a><a href="#l233">233</a><td> * @return {!goog.html.SafeHtml} Details of exception.<tr><td><a id="l234"></a><a href="#l234">234</a><td> */<tr><td><a id="l235"></a><a href="#l235">235</a><td>goog.debug.exposeExceptionAsHtml = function(err, opt_fn) {<tr><td><a id="l236"></a><a href="#l236">236</a><td> /** @preserveTry */<tr><td><a id="l237"></a><a href="#l237">237</a><td> try {<tr><td><a id="l238"></a><a href="#l238">238</a><td> var e = goog.debug.normalizeErrorObject(err);<tr><td><a id="l239"></a><a href="#l239">239</a><td> // Create the error message<tr><td><a id="l240"></a><a href="#l240">240</a><td> var viewSourceUrl = goog.debug.createViewSourceUrl_(e.fileName);<tr><td><a id="l241"></a><a href="#l241">241</a><td> var error = goog.html.SafeHtml.concat(<tr><td><a id="l242"></a><a href="#l242">242</a><td> goog.html.SafeHtml.htmlEscapePreservingNewlinesAndSpaces(<tr><td><a id="l243"></a><a href="#l243">243</a><td> 'Message: ' + e.message + '\nUrl: '),<tr><td><a id="l244"></a><a href="#l244">244</a><td> goog.html.SafeHtml.create('a',<tr><td><a id="l245"></a><a href="#l245">245</a><td> {href: viewSourceUrl, target: '_new'}, e.fileName),<tr><td><a id="l246"></a><a href="#l246">246</a><td> goog.html.SafeHtml.htmlEscapePreservingNewlinesAndSpaces(<tr><td><a id="l247"></a><a href="#l247">247</a><td> '\nLine: ' + e.lineNumber + '\n\nBrowser stack:\n' +<tr><td><a id="l248"></a><a href="#l248">248</a><td> e.stack + '-> ' + '[end]\n\nJS stack traversal:\n' +<tr><td><a id="l249"></a><a href="#l249">249</a><td> goog.debug.getStacktrace(opt_fn) + '-> '));<tr><td><a id="l250"></a><a href="#l250">250</a><td> return error;<tr><td><a id="l251"></a><a href="#l251">251</a><td> } catch (e2) {<tr><td><a id="l252"></a><a href="#l252">252</a><td> return goog.html.SafeHtml.htmlEscapePreservingNewlinesAndSpaces(<tr><td><a id="l253"></a><a href="#l253">253</a><td> 'Exception trying to expose exception! You win, we lose. ' + e2);<tr><td><a id="l254"></a><a href="#l254">254</a><td> }<tr><td><a id="l255"></a><a href="#l255">255</a><td>};<tr><td><a id="l256"></a><a href="#l256">256</a><td><tr><td><a id="l257"></a><a href="#l257">257</a><td><tr><td><a id="l258"></a><a href="#l258">258</a><td>/**<tr><td><a id="l259"></a><a href="#l259">259</a><td> * @param {?string=} opt_fileName<tr><td><a id="l260"></a><a href="#l260">260</a><td> * @return {!goog.html.SafeUrl} SafeUrl with view-source scheme, pointing at<tr><td><a id="l261"></a><a href="#l261">261</a><td> * fileName.<tr><td><a id="l262"></a><a href="#l262">262</a><td> * @private<tr><td><a id="l263"></a><a href="#l263">263</a><td> */<tr><td><a id="l264"></a><a href="#l264">264</a><td>goog.debug.createViewSourceUrl_ = function(opt_fileName) {<tr><td><a id="l265"></a><a href="#l265">265</a><td> if (!goog.isDefAndNotNull(opt_fileName)) {<tr><td><a id="l266"></a><a href="#l266">266</a><td> opt_fileName = '';<tr><td><a id="l267"></a><a href="#l267">267</a><td> }<tr><td><a id="l268"></a><a href="#l268">268</a><td> if (!/^https?:\/\//i.test(opt_fileName)) {<tr><td><a id="l269"></a><a href="#l269">269</a><td> return goog.html.SafeUrl.fromConstant(<tr><td><a id="l270"></a><a href="#l270">270</a><td> goog.string.Const.from('sanitizedviewsrc'));<tr><td><a id="l271"></a><a href="#l271">271</a><td> }<tr><td><a id="l272"></a><a href="#l272">272</a><td> var sanitizedFileName = goog.html.SafeUrl.sanitize(opt_fileName);<tr><td><a id="l273"></a><a href="#l273">273</a><td> return goog.html.uncheckedconversions.<tr><td><a id="l274"></a><a href="#l274">274</a><td> safeUrlFromStringKnownToSatisfyTypeContract(<tr><td><a id="l275"></a><a href="#l275">275</a><td> goog.string.Const.from('view-source scheme plus HTTP/HTTPS URL'),<tr><td><a id="l276"></a><a href="#l276">276</a><td> 'view-source:' + goog.html.SafeUrl.unwrap(sanitizedFileName));<tr><td><a id="l277"></a><a href="#l277">277</a><td>};<tr><td><a id="l278"></a><a href="#l278">278</a><td><tr><td><a id="l279"></a><a href="#l279">279</a><td><tr><td><a id="l280"></a><a href="#l280">280</a><td>/**<tr><td><a id="l281"></a><a href="#l281">281</a><td> * Normalizes the error/exception object between browsers.<tr><td><a id="l282"></a><a href="#l282">282</a><td> * @param {Object} err Raw error object.<tr><td><a id="l283"></a><a href="#l283">283</a><td> * @return {!Object} Normalized error object.<tr><td><a id="l284"></a><a href="#l284">284</a><td> */<tr><td><a id="l285"></a><a href="#l285">285</a><td>goog.debug.normalizeErrorObject = function(err) {<tr><td><a id="l286"></a><a href="#l286">286</a><td> var href = goog.getObjectByName('window.location.href');<tr><td><a id="l287"></a><a href="#l287">287</a><td> if (goog.isString(err)) {<tr><td><a id="l288"></a><a href="#l288">288</a><td> return {<tr><td><a id="l289"></a><a href="#l289">289</a><td> 'message': err,<tr><td><a id="l290"></a><a href="#l290">290</a><td> 'name': 'Unknown error',<tr><td><a id="l291"></a><a href="#l291">291</a><td> 'lineNumber': 'Not available',<tr><td><a id="l292"></a><a href="#l292">292</a><td> 'fileName': href,<tr><td><a id="l293"></a><a href="#l293">293</a><td> 'stack': 'Not available'<tr><td><a id="l294"></a><a href="#l294">294</a><td> };<tr><td><a id="l295"></a><a href="#l295">295</a><td> }<tr><td><a id="l296"></a><a href="#l296">296</a><td><tr><td><a id="l297"></a><a href="#l297">297</a><td> var lineNumber, fileName;<tr><td><a id="l298"></a><a href="#l298">298</a><td> var threwError = false;<tr><td><a id="l299"></a><a href="#l299">299</a><td><tr><td><a id="l300"></a><a href="#l300">300</a><td> try {<tr><td><a id="l301"></a><a href="#l301">301</a><td> lineNumber = err.lineNumber || err.line || 'Not available';<tr><td><a id="l302"></a><a href="#l302">302</a><td> } catch (e) {<tr><td><a id="l303"></a><a href="#l303">303</a><td> // Firefox 2 sometimes throws an error when accessing 'lineNumber':<tr><td><a id="l304"></a><a href="#l304">304</a><td> // Message: Permission denied to get property UnnamedClass.lineNumber<tr><td><a id="l305"></a><a href="#l305">305</a><td> lineNumber = 'Not available';<tr><td><a id="l306"></a><a href="#l306">306</a><td> threwError = true;<tr><td><a id="l307"></a><a href="#l307">307</a><td> }<tr><td><a id="l308"></a><a href="#l308">308</a><td><tr><td><a id="l309"></a><a href="#l309">309</a><td> try {<tr><td><a id="l310"></a><a href="#l310">310</a><td> fileName = err.fileName || err.filename || err.sourceURL ||<tr><td><a id="l311"></a><a href="#l311">311</a><td> // $googDebugFname may be set before a call to eval to set the filename<tr><td><a id="l312"></a><a href="#l312">312</a><td> // that the eval is supposed to present.<tr><td><a id="l313"></a><a href="#l313">313</a><td> goog.global['$googDebugFname'] || href;<tr><td><a id="l314"></a><a href="#l314">314</a><td> } catch (e) {<tr><td><a id="l315"></a><a href="#l315">315</a><td> // Firefox 2 may also throw an error when accessing 'filename'.<tr><td><a id="l316"></a><a href="#l316">316</a><td> fileName = 'Not available';<tr><td><a id="l317"></a><a href="#l317">317</a><td> threwError = true;<tr><td><a id="l318"></a><a href="#l318">318</a><td> }<tr><td><a id="l319"></a><a href="#l319">319</a><td><tr><td><a id="l320"></a><a href="#l320">320</a><td> // The IE Error object contains only the name and the message.<tr><td><a id="l321"></a><a href="#l321">321</a><td> // The Safari Error object uses the line and sourceURL fields.<tr><td><a id="l322"></a><a href="#l322">322</a><td> if (threwError || !err.lineNumber || !err.fileName || !err.stack ||<tr><td><a id="l323"></a><a href="#l323">323</a><td> !err.message || !err.name) {<tr><td><a id="l324"></a><a href="#l324">324</a><td> return {<tr><td><a id="l325"></a><a href="#l325">325</a><td> 'message': err.message || 'Not available',<tr><td><a id="l326"></a><a href="#l326">326</a><td> 'name': err.name || 'UnknownError',<tr><td><a id="l327"></a><a href="#l327">327</a><td> 'lineNumber': lineNumber,<tr><td><a id="l328"></a><a href="#l328">328</a><td> 'fileName': fileName,<tr><td><a id="l329"></a><a href="#l329">329</a><td> 'stack': err.stack || 'Not available'<tr><td><a id="l330"></a><a href="#l330">330</a><td> };<tr><td><a id="l331"></a><a href="#l331">331</a><td> }<tr><td><a id="l332"></a><a href="#l332">332</a><td><tr><td><a id="l333"></a><a href="#l333">333</a><td> // Standards error object<tr><td><a id="l334"></a><a href="#l334">334</a><td> return err;<tr><td><a id="l335"></a><a href="#l335">335</a><td>};<tr><td><a id="l336"></a><a href="#l336">336</a><td><tr><td><a id="l337"></a><a href="#l337">337</a><td><tr><td><a id="l338"></a><a href="#l338">338</a><td>/**<tr><td><a id="l339"></a><a href="#l339">339</a><td> * Converts an object to an Error if it's a String,<tr><td><a id="l340"></a><a href="#l340">340</a><td> * adds a stacktrace if there isn't one,<tr><td><a id="l341"></a><a href="#l341">341</a><td> * and optionally adds an extra message.<tr><td><a id="l342"></a><a href="#l342">342</a><td> * @param {Error|string} err the original thrown object or string.<tr><td><a id="l343"></a><a href="#l343">343</a><td> * @param {string=} opt_message optional additional message to add to the<tr><td><a id="l344"></a><a href="#l344">344</a><td> * error.<tr><td><a id="l345"></a><a href="#l345">345</a><td> * @return {!Error} If err is a string, it is used to create a new Error,<tr><td><a id="l346"></a><a href="#l346">346</a><td> * which is enhanced and returned. Otherwise err itself is enhanced<tr><td><a id="l347"></a><a href="#l347">347</a><td> * and returned.<tr><td><a id="l348"></a><a href="#l348">348</a><td> */<tr><td><a id="l349"></a><a href="#l349">349</a><td>goog.debug.enhanceError = function(err, opt_message) {<tr><td><a id="l350"></a><a href="#l350">350</a><td> var error;<tr><td><a id="l351"></a><a href="#l351">351</a><td> if (typeof err == 'string') {<tr><td><a id="l352"></a><a href="#l352">352</a><td> error = Error(err);<tr><td><a id="l353"></a><a href="#l353">353</a><td> if (Error.captureStackTrace) {<tr><td><a id="l354"></a><a href="#l354">354</a><td> // Trim this function off the call stack, if we can.<tr><td><a id="l355"></a><a href="#l355">355</a><td> Error.captureStackTrace(error, goog.debug.enhanceError);<tr><td><a id="l356"></a><a href="#l356">356</a><td> }<tr><td><a id="l357"></a><a href="#l357">357</a><td> } else {<tr><td><a id="l358"></a><a href="#l358">358</a><td> error = err;<tr><td><a id="l359"></a><a href="#l359">359</a><td> }<tr><td><a id="l360"></a><a href="#l360">360</a><td><tr><td><a id="l361"></a><a href="#l361">361</a><td> if (!error.stack) {<tr><td><a id="l362"></a><a href="#l362">362</a><td> error.stack = goog.debug.getStacktrace(goog.debug.enhanceError);<tr><td><a id="l363"></a><a href="#l363">363</a><td> }<tr><td><a id="l364"></a><a href="#l364">364</a><td> if (opt_message) {<tr><td><a id="l365"></a><a href="#l365">365</a><td> // find the first unoccupied 'messageX' property<tr><td><a id="l366"></a><a href="#l366">366</a><td> var x = 0;<tr><td><a id="l367"></a><a href="#l367">367</a><td> while (error['message' + x]) {<tr><td><a id="l368"></a><a href="#l368">368</a><td> ++x;<tr><td><a id="l369"></a><a href="#l369">369</a><td> }<tr><td><a id="l370"></a><a href="#l370">370</a><td> error['message' + x] = String(opt_message);<tr><td><a id="l371"></a><a href="#l371">371</a><td> }<tr><td><a id="l372"></a><a href="#l372">372</a><td> return error;<tr><td><a id="l373"></a><a href="#l373">373</a><td>};<tr><td><a id="l374"></a><a href="#l374">374</a><td><tr><td><a id="l375"></a><a href="#l375">375</a><td><tr><td><a id="l376"></a><a href="#l376">376</a><td>/**<tr><td><a id="l377"></a><a href="#l377">377</a><td> * Gets the current stack trace. Simple and iterative - doesn't worry about<tr><td><a id="l378"></a><a href="#l378">378</a><td> * catching circular references or getting the args.<tr><td><a id="l379"></a><a href="#l379">379</a><td> * @param {number=} opt_depth Optional maximum depth to trace back to.<tr><td><a id="l380"></a><a href="#l380">380</a><td> * @return {string} A string with the function names of all functions in the<tr><td><a id="l381"></a><a href="#l381">381</a><td> * stack, separated by \n.<tr><td><a id="l382"></a><a href="#l382">382</a><td> * @suppress {es5Strict}<tr><td><a id="l383"></a><a href="#l383">383</a><td> */<tr><td><a id="l384"></a><a href="#l384">384</a><td>goog.debug.getStacktraceSimple = function(opt_depth) {<tr><td><a id="l385"></a><a href="#l385">385</a><td> if (goog.STRICT_MODE_COMPATIBLE) {<tr><td><a id="l386"></a><a href="#l386">386</a><td> var stack = goog.debug.getNativeStackTrace_(goog.debug.getStacktraceSimple);<tr><td><a id="l387"></a><a href="#l387">387</a><td> if (stack) {<tr><td><a id="l388"></a><a href="#l388">388</a><td> return stack;<tr><td><a id="l389"></a><a href="#l389">389</a><td> }<tr><td><a id="l390"></a><a href="#l390">390</a><td> // NOTE: browsers that have strict mode support also have native "stack"<tr><td><a id="l391"></a><a href="#l391">391</a><td> // properties. Fall-through for legacy browser support.<tr><td><a id="l392"></a><a href="#l392">392</a><td> }<tr><td><a id="l393"></a><a href="#l393">393</a><td><tr><td><a id="l394"></a><a href="#l394">394</a><td> var sb = [];<tr><td><a id="l395"></a><a href="#l395">395</a><td> var fn = arguments.callee.caller;<tr><td><a id="l396"></a><a href="#l396">396</a><td> var depth = 0;<tr><td><a id="l397"></a><a href="#l397">397</a><td><tr><td><a id="l398"></a><a href="#l398">398</a><td> while (fn && (!opt_depth || depth < opt_depth)) {<tr><td><a id="l399"></a><a href="#l399">399</a><td> sb.push(goog.debug.getFunctionName(fn));<tr><td><a id="l400"></a><a href="#l400">400</a><td> sb.push('()\n');<tr><td><a id="l401"></a><a href="#l401">401</a><td> /** @preserveTry */<tr><td><a id="l402"></a><a href="#l402">402</a><td> try {<tr><td><a id="l403"></a><a href="#l403">403</a><td> fn = fn.caller;<tr><td><a id="l404"></a><a href="#l404">404</a><td> } catch (e) {<tr><td><a id="l405"></a><a href="#l405">405</a><td> sb.push('[exception trying to get caller]\n');<tr><td><a id="l406"></a><a href="#l406">406</a><td> break;<tr><td><a id="l407"></a><a href="#l407">407</a><td> }<tr><td><a id="l408"></a><a href="#l408">408</a><td> depth++;<tr><td><a id="l409"></a><a href="#l409">409</a><td> if (depth >= goog.debug.MAX_STACK_DEPTH) {<tr><td><a id="l410"></a><a href="#l410">410</a><td> sb.push('[...long stack...]');<tr><td><a id="l411"></a><a href="#l411">411</a><td> break;<tr><td><a id="l412"></a><a href="#l412">412</a><td> }<tr><td><a id="l413"></a><a href="#l413">413</a><td> }<tr><td><a id="l414"></a><a href="#l414">414</a><td> if (opt_depth && depth >= opt_depth) {<tr><td><a id="l415"></a><a href="#l415">415</a><td> sb.push('[...reached max depth limit...]');<tr><td><a id="l416"></a><a href="#l416">416</a><td> } else {<tr><td><a id="l417"></a><a href="#l417">417</a><td> sb.push('[end]');<tr><td><a id="l418"></a><a href="#l418">418</a><td> }<tr><td><a id="l419"></a><a href="#l419">419</a><td><tr><td><a id="l420"></a><a href="#l420">420</a><td> return sb.join('');<tr><td><a id="l421"></a><a href="#l421">421</a><td>};<tr><td><a id="l422"></a><a href="#l422">422</a><td><tr><td><a id="l423"></a><a href="#l423">423</a><td><tr><td><a id="l424"></a><a href="#l424">424</a><td>/**<tr><td><a id="l425"></a><a href="#l425">425</a><td> * Max length of stack to try and output<tr><td><a id="l426"></a><a href="#l426">426</a><td> * @type {number}<tr><td><a id="l427"></a><a href="#l427">427</a><td> */<tr><td><a id="l428"></a><a href="#l428">428</a><td>goog.debug.MAX_STACK_DEPTH = 50;<tr><td><a id="l429"></a><a href="#l429">429</a><td><tr><td><a id="l430"></a><a href="#l430">430</a><td><tr><td><a id="l431"></a><a href="#l431">431</a><td>/**<tr><td><a id="l432"></a><a href="#l432">432</a><td> * @param {Function} fn The function to start getting the trace from.<tr><td><a id="l433"></a><a href="#l433">433</a><td> * @return {?string}<tr><td><a id="l434"></a><a href="#l434">434</a><td> * @private<tr><td><a id="l435"></a><a href="#l435">435</a><td> */<tr><td><a id="l436"></a><a href="#l436">436</a><td>goog.debug.getNativeStackTrace_ = function(fn) {<tr><td><a id="l437"></a><a href="#l437">437</a><td> var tempErr = new Error();<tr><td><a id="l438"></a><a href="#l438">438</a><td> if (Error.captureStackTrace) {<tr><td><a id="l439"></a><a href="#l439">439</a><td> Error.captureStackTrace(tempErr, fn);<tr><td><a id="l440"></a><a href="#l440">440</a><td> return String(tempErr.stack);<tr><td><a id="l441"></a><a href="#l441">441</a><td> } else {<tr><td><a id="l442"></a><a href="#l442">442</a><td> // IE10, only adds stack traces when an exception is thrown.<tr><td><a id="l443"></a><a href="#l443">443</a><td> try {<tr><td><a id="l444"></a><a href="#l444">444</a><td> throw tempErr;<tr><td><a id="l445"></a><a href="#l445">445</a><td> } catch (e) {<tr><td><a id="l446"></a><a href="#l446">446</a><td> tempErr = e;<tr><td><a id="l447"></a><a href="#l447">447</a><td> }<tr><td><a id="l448"></a><a href="#l448">448</a><td> var stack = tempErr.stack;<tr><td><a id="l449"></a><a href="#l449">449</a><td> if (stack) {<tr><td><a id="l450"></a><a href="#l450">450</a><td> return String(stack);<tr><td><a id="l451"></a><a href="#l451">451</a><td> }<tr><td><a id="l452"></a><a href="#l452">452</a><td> }<tr><td><a id="l453"></a><a href="#l453">453</a><td> return null;<tr><td><a id="l454"></a><a href="#l454">454</a><td>};<tr><td><a id="l455"></a><a href="#l455">455</a><td><tr><td><a id="l456"></a><a href="#l456">456</a><td><tr><td><a id="l457"></a><a href="#l457">457</a><td>/**<tr><td><a id="l458"></a><a href="#l458">458</a><td> * Gets the current stack trace, either starting from the caller or starting<tr><td><a id="l459"></a><a href="#l459">459</a><td> * from a specified function that's currently on the call stack.<tr><td><a id="l460"></a><a href="#l460">460</a><td> * @param {Function=} opt_fn Optional function to start getting the trace from.<tr><td><a id="l461"></a><a href="#l461">461</a><td> * If not provided, defaults to the function that called this.<tr><td><a id="l462"></a><a href="#l462">462</a><td> * @return {string} Stack trace.<tr><td><a id="l463"></a><a href="#l463">463</a><td> * @suppress {es5Strict}<tr><td><a id="l464"></a><a href="#l464">464</a><td> */<tr><td><a id="l465"></a><a href="#l465">465</a><td>goog.debug.getStacktrace = function(opt_fn) {<tr><td><a id="l466"></a><a href="#l466">466</a><td> var stack;<tr><td><a id="l467"></a><a href="#l467">467</a><td> if (goog.STRICT_MODE_COMPATIBLE) {<tr><td><a id="l468"></a><a href="#l468">468</a><td> // Try to get the stack trace from the environment if it is available.<tr><td><a id="l469"></a><a href="#l469">469</a><td> var contextFn = opt_fn || goog.debug.getStacktrace;<tr><td><a id="l470"></a><a href="#l470">470</a><td> stack = goog.debug.getNativeStackTrace_(contextFn);<tr><td><a id="l471"></a><a href="#l471">471</a><td> }<tr><td><a id="l472"></a><a href="#l472">472</a><td> if (!stack) {<tr><td><a id="l473"></a><a href="#l473">473</a><td> // NOTE: browsers that have strict mode support also have native "stack"<tr><td><a id="l474"></a><a href="#l474">474</a><td> // properties. This function will throw in strict mode.<tr><td><a id="l475"></a><a href="#l475">475</a><td> stack = goog.debug.getStacktraceHelper_(<tr><td><a id="l476"></a><a href="#l476">476</a><td> opt_fn || arguments.callee.caller, []);<tr><td><a id="l477"></a><a href="#l477">477</a><td> }<tr><td><a id="l478"></a><a href="#l478">478</a><td> return stack;<tr><td><a id="l479"></a><a href="#l479">479</a><td>};<tr><td><a id="l480"></a><a href="#l480">480</a><td><tr><td><a id="l481"></a><a href="#l481">481</a><td><tr><td><a id="l482"></a><a href="#l482">482</a><td>/**<tr><td><a id="l483"></a><a href="#l483">483</a><td> * Private helper for getStacktrace().<tr><td><a id="l484"></a><a href="#l484">484</a><td> * @param {Function} fn Function to start getting the trace from.<tr><td><a id="l485"></a><a href="#l485">485</a><td> * @param {Array<!Function>} visited List of functions visited so far.<tr><td><a id="l486"></a><a href="#l486">486</a><td> * @return {string} Stack trace starting from function fn.<tr><td><a id="l487"></a><a href="#l487">487</a><td> * @suppress {es5Strict}<tr><td><a id="l488"></a><a href="#l488">488</a><td> * @private<tr><td><a id="l489"></a><a href="#l489">489</a><td> */<tr><td><a id="l490"></a><a href="#l490">490</a><td>goog.debug.getStacktraceHelper_ = function(fn, visited) {<tr><td><a id="l491"></a><a href="#l491">491</a><td> var sb = [];<tr><td><a id="l492"></a><a href="#l492">492</a><td><tr><td><a id="l493"></a><a href="#l493">493</a><td> // Circular reference, certain functions like bind seem to cause a recursive<tr><td><a id="l494"></a><a href="#l494">494</a><td> // loop so we need to catch circular references<tr><td><a id="l495"></a><a href="#l495">495</a><td> if (goog.array.contains(visited, fn)) {<tr><td><a id="l496"></a><a href="#l496">496</a><td> sb.push('[...circular reference...]');<tr><td><a id="l497"></a><a href="#l497">497</a><td><tr><td><a id="l498"></a><a href="#l498">498</a><td> // Traverse the call stack until function not found or max depth is reached<tr><td><a id="l499"></a><a href="#l499">499</a><td> } else if (fn && visited.length < goog.debug.MAX_STACK_DEPTH) {<tr><td><a id="l500"></a><a href="#l500">500</a><td> sb.push(goog.debug.getFunctionName(fn) + '(');<tr><td><a id="l501"></a><a href="#l501">501</a><td> var args = fn.arguments;<tr><td><a id="l502"></a><a href="#l502">502</a><td> // Args may be null for some special functions such as host objects or eval.<tr><td><a id="l503"></a><a href="#l503">503</a><td> for (var i = 0; args && i < args.length; i++) {<tr><td><a id="l504"></a><a href="#l504">504</a><td> if (i > 0) {<tr><td><a id="l505"></a><a href="#l505">505</a><td> sb.push(', ');<tr><td><a id="l506"></a><a href="#l506">506</a><td> }<tr><td><a id="l507"></a><a href="#l507">507</a><td> var argDesc;<tr><td><a id="l508"></a><a href="#l508">508</a><td> var arg = args[i];<tr><td><a id="l509"></a><a href="#l509">509</a><td> switch (typeof arg) {<tr><td><a id="l510"></a><a href="#l510">510</a><td> case 'object':<tr><td><a id="l511"></a><a href="#l511">511</a><td> argDesc = arg ? 'object' : 'null';<tr><td><a id="l512"></a><a href="#l512">512</a><td> break;<tr><td><a id="l513"></a><a href="#l513">513</a><td><tr><td><a id="l514"></a><a href="#l514">514</a><td> case 'string':<tr><td><a id="l515"></a><a href="#l515">515</a><td> argDesc = arg;<tr><td><a id="l516"></a><a href="#l516">516</a><td> break;<tr><td><a id="l517"></a><a href="#l517">517</a><td><tr><td><a id="l518"></a><a href="#l518">518</a><td> case 'number':<tr><td><a id="l519"></a><a href="#l519">519</a><td> argDesc = String(arg);<tr><td><a id="l520"></a><a href="#l520">520</a><td> break;<tr><td><a id="l521"></a><a href="#l521">521</a><td><tr><td><a id="l522"></a><a href="#l522">522</a><td> case 'boolean':<tr><td><a id="l523"></a><a href="#l523">523</a><td> argDesc = arg ? 'true' : 'false';<tr><td><a id="l524"></a><a href="#l524">524</a><td> break;<tr><td><a id="l525"></a><a href="#l525">525</a><td><tr><td><a id="l526"></a><a href="#l526">526</a><td> case 'function':<tr><td><a id="l527"></a><a href="#l527">527</a><td> argDesc = goog.debug.getFunctionName(arg);<tr><td><a id="l528"></a><a href="#l528">528</a><td> argDesc = argDesc ? argDesc : '[fn]';<tr><td><a id="l529"></a><a href="#l529">529</a><td> break;<tr><td><a id="l530"></a><a href="#l530">530</a><td><tr><td><a id="l531"></a><a href="#l531">531</a><td> case 'undefined':<tr><td><a id="l532"></a><a href="#l532">532</a><td> default:<tr><td><a id="l533"></a><a href="#l533">533</a><td> argDesc = typeof arg;<tr><td><a id="l534"></a><a href="#l534">534</a><td> break;<tr><td><a id="l535"></a><a href="#l535">535</a><td> }<tr><td><a id="l536"></a><a href="#l536">536</a><td><tr><td><a id="l537"></a><a href="#l537">537</a><td> if (argDesc.length > 40) {<tr><td><a id="l538"></a><a href="#l538">538</a><td> argDesc = argDesc.substr(0, 40) + '...';<tr><td><a id="l539"></a><a href="#l539">539</a><td> }<tr><td><a id="l540"></a><a href="#l540">540</a><td> sb.push(argDesc);<tr><td><a id="l541"></a><a href="#l541">541</a><td> }<tr><td><a id="l542"></a><a href="#l542">542</a><td> visited.push(fn);<tr><td><a id="l543"></a><a href="#l543">543</a><td> sb.push(')\n');<tr><td><a id="l544"></a><a href="#l544">544</a><td> /** @preserveTry */<tr><td><a id="l545"></a><a href="#l545">545</a><td> try {<tr><td><a id="l546"></a><a href="#l546">546</a><td> sb.push(goog.debug.getStacktraceHelper_(fn.caller, visited));<tr><td><a id="l547"></a><a href="#l547">547</a><td> } catch (e) {<tr><td><a id="l548"></a><a href="#l548">548</a><td> sb.push('[exception trying to get caller]\n');<tr><td><a id="l549"></a><a href="#l549">549</a><td> }<tr><td><a id="l550"></a><a href="#l550">550</a><td><tr><td><a id="l551"></a><a href="#l551">551</a><td> } else if (fn) {<tr><td><a id="l552"></a><a href="#l552">552</a><td> sb.push('[...long stack...]');<tr><td><a id="l553"></a><a href="#l553">553</a><td> } else {<tr><td><a id="l554"></a><a href="#l554">554</a><td> sb.push('[end]');<tr><td><a id="l555"></a><a href="#l555">555</a><td> }<tr><td><a id="l556"></a><a href="#l556">556</a><td> return sb.join('');<tr><td><a id="l557"></a><a href="#l557">557</a><td>};<tr><td><a id="l558"></a><a href="#l558">558</a><td><tr><td><a id="l559"></a><a href="#l559">559</a><td><tr><td><a id="l560"></a><a href="#l560">560</a><td>/**<tr><td><a id="l561"></a><a href="#l561">561</a><td> * Set a custom function name resolver.<tr><td><a id="l562"></a><a href="#l562">562</a><td> * @param {function(Function): string} resolver Resolves functions to their<tr><td><a id="l563"></a><a href="#l563">563</a><td> * names.<tr><td><a id="l564"></a><a href="#l564">564</a><td> */<tr><td><a id="l565"></a><a href="#l565">565</a><td>goog.debug.setFunctionResolver = function(resolver) {<tr><td><a id="l566"></a><a href="#l566">566</a><td> goog.debug.fnNameResolver_ = resolver;<tr><td><a id="l567"></a><a href="#l567">567</a><td>};<tr><td><a id="l568"></a><a href="#l568">568</a><td><tr><td><a id="l569"></a><a href="#l569">569</a><td><tr><td><a id="l570"></a><a href="#l570">570</a><td>/**<tr><td><a id="l571"></a><a href="#l571">571</a><td> * Gets a function name<tr><td><a id="l572"></a><a href="#l572">572</a><td> * @param {Function} fn Function to get name of.<tr><td><a id="l573"></a><a href="#l573">573</a><td> * @return {string} Function's name.<tr><td><a id="l574"></a><a href="#l574">574</a><td> */<tr><td><a id="l575"></a><a href="#l575">575</a><td>goog.debug.getFunctionName = function(fn) {<tr><td><a id="l576"></a><a href="#l576">576</a><td> if (goog.debug.fnNameCache_[fn]) {<tr><td><a id="l577"></a><a href="#l577">577</a><td> return goog.debug.fnNameCache_[fn];<tr><td><a id="l578"></a><a href="#l578">578</a><td> }<tr><td><a id="l579"></a><a href="#l579">579</a><td> if (goog.debug.fnNameResolver_) {<tr><td><a id="l580"></a><a href="#l580">580</a><td> var name = goog.debug.fnNameResolver_(fn);<tr><td><a id="l581"></a><a href="#l581">581</a><td> if (name) {<tr><td><a id="l582"></a><a href="#l582">582</a><td> goog.debug.fnNameCache_[fn] = name;<tr><td><a id="l583"></a><a href="#l583">583</a><td> return name;<tr><td><a id="l584"></a><a href="#l584">584</a><td> }<tr><td><a id="l585"></a><a href="#l585">585</a><td> }<tr><td><a id="l586"></a><a href="#l586">586</a><td><tr><td><a id="l587"></a><a href="#l587">587</a><td> // Heuristically determine function name based on code.<tr><td><a id="l588"></a><a href="#l588">588</a><td> var functionSource = String(fn);<tr><td><a id="l589"></a><a href="#l589">589</a><td> if (!goog.debug.fnNameCache_[functionSource]) {<tr><td><a id="l590"></a><a href="#l590">590</a><td> var matches = /function ([^\(]+)/.exec(functionSource);<tr><td><a id="l591"></a><a href="#l591">591</a><td> if (matches) {<tr><td><a id="l592"></a><a href="#l592">592</a><td> var method = matches[1];<tr><td><a id="l593"></a><a href="#l593">593</a><td> goog.debug.fnNameCache_[functionSource] = method;<tr><td><a id="l594"></a><a href="#l594">594</a><td> } else {<tr><td><a id="l595"></a><a href="#l595">595</a><td> goog.debug.fnNameCache_[functionSource] = '[Anonymous]';<tr><td><a id="l596"></a><a href="#l596">596</a><td> }<tr><td><a id="l597"></a><a href="#l597">597</a><td> }<tr><td><a id="l598"></a><a href="#l598">598</a><td><tr><td><a id="l599"></a><a href="#l599">599</a><td> return goog.debug.f