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annotate piecrust/resources/server/piecrust-debug-info.js @ 556:93b656f0af54

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serve: Improve debug information in the preview server. Now the debug window only loads debug info on demand.
author Ludovic Chabant <ludovic@chabant.com>
date Wed, 12 Aug 2015 23:18:35 -0700
parents 9612cfc6455a
children 8d5b8a3dca02
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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 == 200) {
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288 info.innerHTML = xmlHttp.responseText;
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289 }
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290 else if(xmlHttp.status == 400) {
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291 info.innerHTML = "Error fetching debug info.";
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292 }
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293 else {
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294 info.innerHTML = "Unknown error.";
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295 }
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296 }
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297 }
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298
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299 var pageUrl = window.location.pathname;
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300 xmlHttp.open("GET", "/__piecrust_debug/debug_info?page=" + pageUrl, true);
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301 xmlHttp.send();
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302 }
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303
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304 ///////////////////////////////////////////////////////////////////////////////
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305
552
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306 var notification = new NotificationArea();
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307 var assetReloader = new AssetReloader();
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308
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309 window.onload = function() {
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310 var cacheBust = '?' + new Date().getTime();
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311
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312 var style = document.createElement('link');
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313 style.rel = 'stylesheet';
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314 style.type = 'text/css';
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315 style.href = '/__piecrust_static/piecrust-debug-info.css' + cacheBust;
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316 document.head.appendChild(style);
556
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317
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318 var expander = document.querySelector('.piecrust-debug-expander');
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319 expander.onclick = toggleDebugInfo;
552
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320 };
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321
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322
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323 window.onbeforeunload = function(e) {
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324 if (eventSource != null)
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325 eventSource.close();
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326 };
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327