Mercurial > piecrust2

annotate piecrust/resources/server/piecrust-debug-info.js @ 1188:a7c43131d871

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bake: Fix file write flushing problem with Python 3.8+ Writing the cache files fails in Python 3.8 because it looks like flushing behaviour has changed. We need to explicitly flush. And even then, in very rare occurrences, it looks like it can still run into racing conditions, so we do a very hacky and ugly "retry" loop when fetching cached data :(
author Ludovic Chabant <ludovic@chabant.com>
date Tue, 15 Jun 2021 22:36:23 -0700
parents 8d5b8a3dca02
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 ///////////////////////////////////////////////////////////////////////////////
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2 // PieCrust debug info and features
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3 //
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4 // This stuff is injected by PieCrust's preview server and shouldn't show up
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5 // in production. It should all be self-contained in this one file.
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6 ///////////////////////////////////////////////////////////////////////////////
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7
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8 var eventSource = new EventSource("/__piecrust_debug/pipeline_status");
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9
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10 if (eventSource != null) {
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11 eventSource.onerror = function(e) {
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12 console.log("Error with SSE, closing.", e);
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13 eventSource.close();
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14 };
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15
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16 eventSource.addEventListener('ping', function(e) {
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17 });
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18
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19 eventSource.addEventListener('pipeline_success', function(e) {
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20 var obj = JSON.parse(e.data);
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21 console.log("Got pipeline success", obj);
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22
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23 // Check which assets were processed, and whether they are referenced
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24 // by the current page for the usual use-cases.
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25 for (var i = 0; i < obj.assets.length; ++i) {
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26 a = obj.assets[i];
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27 if (assetReloader.reloadAsset(a)) {
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28 notification.flashSuccess("Reloaded " + a);
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29 }
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30 }
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31 });
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32
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33 eventSource.addEventListener('pipeline_error', function(e) {
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34 var obj = JSON.parse(e.data);
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35 console.log("Got pipeline error", obj);
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36
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37 var outer = document.createElement('div');
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38 outer.style = 'padding: 1em;';
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39 for (var i = 0; i < obj.assets.length; ++i) {
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40 var item = obj.assets[i];
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41 var markup = (
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42 '<p>Error processing: <span style="font-family: monospace;">' +
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43 item.path + '</span></p>\n' +
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44 '<ul>');
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45 for (var j = 0; j < item.errors.length; ++j) {
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46 markup += (
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47 '<li style="font-family: monospace;">' +
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48 item.errors[j] +
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49 '</li>\n');
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50 }
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51 markup += '</ul>\n';
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52 var entry = document.createElement('div');
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53 entry.innerHTML = markup;
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54 outer.appendChild(entry);
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55 }
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56
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57 var placeholder = document.getElementById('piecrust-debug-info-pipeline-status');
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58 placeholder.appendChild(outer);
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59 });
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60 }
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61
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62 ///////////////////////////////////////////////////////////////////////////////
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63
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64 NotificationArea = function() {
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65 var area = document.createElement('div');
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66 area.id = 'piecrust-debug-notifications';
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67 area.className = 'piecrust-debug-notifications';
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68 document.querySelector('body').appendChild(area);
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69
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70 this._area = area;
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71 this._lastId = 0;
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72 };
219
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73
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74 NotificationArea.prototype.flashSuccess = function(msg) {
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75 this.flashMessage(msg, 'success');
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76 };
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77
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78 NotificationArea.prototype.flashError = function(msg) {
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79 this.flashMessage(msg, 'error');
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80 };
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81
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82 NotificationArea.prototype.flashMessage = function(msg, css_class) {
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83 this._lastId += 1;
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84 var thisId = this._lastId;
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85 this._area.insertAdjacentHTML(
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86 'afterbegin',
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87 '<div id="piecrust-debug-notification-msg' + thisId + '" ' +
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88 'class="piecrust-debug-notification ' +
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89 'piecrust-debug-notification-' + css_class + '">' +
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90 msg + '</div>');
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91
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92 window.setTimeout(this._discardNotification, 2000, thisId);
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93 };
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94
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95 NotificationArea.prototype._discardNotification = function(noteId) {
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96 var added = document.querySelector('#piecrust-debug-notification-msg' + noteId);
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97 added.remove();
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98 };
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99
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100 ///////////////////////////////////////////////////////////////////////////////
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101
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102 function _get_extension(name) {
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103 var ext = null;
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104 var dotIdx = name.lastIndexOf('.');
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105 if (dotIdx > 0)
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106 ext = name.substr(dotIdx + 1);
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107 return ext;
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108 }
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109
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110 function _get_basename(name) {
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111 var filename = name;
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112 var slashIdx = name.lastIndexOf('/');
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113 if (slashIdx > 0)
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114 filename = name.substr(slashIdx + 1);
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115 return filename;
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116 }
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117
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118 var _regex_cache_bust = /\?\d+$/;
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119
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120 function _is_path_match(path1, path2) {
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121 path1 = path1.replace(_regex_cache_bust, '');
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122 console.log("Matching:", path1, path2)
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123 return path1.endsWith(path2);
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124 };
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125
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126 function _add_cache_bust(path, cache_bust) {
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127 path = path.replace(_regex_cache_bust, '');
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128 return path + cache_bust;
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129 }
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130
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131 ///////////////////////////////////////////////////////////////////////////////
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132
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133 AssetReloader = function() {
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134 this._imgExts = ['jpg', 'jpeg', 'png', 'gif', 'svg'];
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135 this._imgReloader = new ImageReloader();
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136 this._cssReloader = new CssReloader();
219
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137 };
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138
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139 AssetReloader.prototype.reloadAsset = function(name) {
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140 var ext = _get_extension(name);
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141 var filename = _get_basename(name);
219
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142
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143 if (ext == 'css') {
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144 return this._cssReloader.reloadStylesheet(filename);
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145 }
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146 if (this._imgExts.indexOf(ext) >= 0) {
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147 return this._imgReloader.reloadImage(filename);
219
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148 }
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149
552
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150 console.log("Don't know how to reload", filename);
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151 return false;
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152 };
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153
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154 ///////////////////////////////////////////////////////////////////////////////
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155
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156 CssReloader = function() {
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157 };
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158
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159 CssReloader.prototype.reloadStylesheet = function(name) {
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160 var result = false;
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161 var sheets = document.styleSheets;
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162 var cacheBust = '?' + new Date().getTime();
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163 for (var i = 0; i < sheets.length; ++i) {
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164 var sheet = sheets[i];
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165 if (_is_path_match(sheet.href, name)) {
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166 sheet.ownerNode.href = _add_cache_bust(sheet.href, cacheBust);
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167 result = true;
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168 }
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169 }
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170 return result;
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171 };
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172
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173 ///////////////////////////////////////////////////////////////////////////////
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174
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175 ImageReloader = function() {
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176 this._imgStyles = [
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177 { selector: 'background', styleNames: ['backgroundImage'] },
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178 ];
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179 this._regexCssUrl = /\burl\s*\(([^)]+)\)/;
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180 };
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181
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182 ImageReloader.prototype.reloadImage = function(name) {
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183 var result = false;
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184 var imgs = document.images;
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185 var cacheBust = '?' + new Date().getTime();
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186 for (var i = 0; i < imgs.length; ++i) {
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187 var img = imgs[i];
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188 if (_is_path_match(img.src, name)) {
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189 img.src = _add_cache_bust(img.src, cacheBust);
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190 result = true;
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191 }
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192 }
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193 for (var i = 0; i < this._imgStyles.length; ++i) {
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194 var imgInfo = this._imgStyles[i];
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195 var domImgs = document.querySelectorAll(
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196 "[style*=" + imgInfo.selector + "]");
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197 for (var j = 0; j < domImgs.length; ++j) {
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198 var img = domImgs[j];
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199 result |= this._reloadStyleImage(img.style, imgInfo.styleNames,
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200 name, cacheBust);
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201 }
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202 }
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203 for (var i = 0; i < document.styleSheets.length; ++i) {
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204 var styleSheet = document.styleSheets[i];
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205 result |= this._reloadStylesheetImage(styleSheet, name, cacheBust);
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206 }
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207 return result;
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208 };
219
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209
552
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210 ImageReloader.prototype._reloadStyleImage = function(style, styleNames, path,
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211 cacheBust) {
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212 var result = false;
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213 for (var i = 0; i < styleNames.length; ++i) {
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214 var value = style[styleNames[i]];
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215 if ((typeof value) == 'string') {
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216 m = this._regexCssUrl.exec(value);
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217 if (m != null) {
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218 var m_clean = m[1].replace(/^['"]/, '');
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219 m_clean = m_clean.replace(/['"]$/, '');
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220 if (_is_path_match(m_clean, path)) {
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221 m_clean = _add_cache_bust(m_clean, cacheBust);
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222 style[styleNames[i]] = 'url("' + m_clean + '")';
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223 result = true;
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224 }
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225 }
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226 }
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227 }
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228 return result;
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229 };
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230
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231 ImageReloader.prototype._reloadStylesheetImage = function(styleSheet, path,
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232 cacheBust) {
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233 try {
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234 var rules = styleSheet.cssRules;
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235 } catch (e) {
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236 // Things like remote CSS stylesheets (e.g. a Google Fonts ones)
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237 // will triger a SecurityException here, so just ignore that.
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238 return;
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239 }
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240
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241 var result = false;
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242 for (var i = 0; i < rules.length; ++i) {
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243 var rule = rules[i];
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244 switch (rule.type) {
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245 case CSSRule.IMPORT_RULE:
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246 result |= this._reloadStylesheetImage(rule.styleSheet, path,
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247 cacheBust);
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248 break;
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249 case CSSRule.MEDIA_RULE:
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250 result |= this._reloadStylesheetImage(rule, path, cacheBust);
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251 break;
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252 case CSSRule.STYLE_RULE:
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253 for (var j = 0; j < this._imgStyles.length; ++j) {
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254 var imgInfo = this._imgStyles[j];
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255 result |= this._reloadStyleImage(
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256 rule.style, imgInfo.styleNames, path, cacheBust);
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257 }
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258 break;
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259 }
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260 }
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261 return result;
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262 };
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263
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264 ///////////////////////////////////////////////////////////////////////////////
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265
556
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266 function toggleDebugInfo() {
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267 var info = document.querySelector('.piecrust-debug-info');
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268 if (info.classList.contains('piecrust-debug-info-unloaded')) {
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269 loadDebugInfo();
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270 info.classList.remove('piecrust-debug-info-unloaded');
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271 }
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272 if (this.innerHTML == '[+]') {
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273 this.innerHTML = '[-]';
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274 info.style = "";
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275 } else {
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276 this.innerHTML = '[+]';
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277 info.style = "display: none;";
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278 }
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279 }
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280
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281 function loadDebugInfo() {
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282 var xmlHttp = new XMLHttpRequest();
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283
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284 xmlHttp.onreadystatechange = function() {
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285 if (xmlHttp.readyState == XMLHttpRequest.DONE) {
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286 var info = document.querySelector('.piecrust-debug-info');
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287 if(xmlHttp.status < 500) {
556
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288 info.innerHTML = xmlHttp.responseText;
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289 }
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290 else {
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291 console.log(xmlHttp);
556
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292 info.innerHTML = "Unknown error.";
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293 }
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294 }
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295 }
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296
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297 var pageUrl = window.location.pathname;
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298 xmlHttp.open("GET", "/__piecrust_debug/debug_info?page=" + pageUrl, true);
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299 xmlHttp.send();
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300 }
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301
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302 ///////////////////////////////////////////////////////////////////////////////
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303
552
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304 var notification = new NotificationArea();
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305 var assetReloader = new AssetReloader();
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306
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307 window.onload = function() {
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308 var cacheBust = '?' + new Date().getTime();
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309
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310 var style = document.createElement('link');
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311 style.rel = 'stylesheet';
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312 style.type = 'text/css';
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313 style.href = '/__piecrust_static/piecrust-debug-info.css' + cacheBust;
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314 document.head.appendChild(style);
556
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315
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316 var expander = document.querySelector('.piecrust-debug-expander');
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317 expander.onclick = toggleDebugInfo;
552
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318 };
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319
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320
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321 window.onbeforeunload = function(e) {
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322 if (eventSource != null)
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323 eventSource.close();
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324 };
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325