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Issue 5978149049335808: Issue 1290 - Added support for un-prefixedcreateShadowRoot (Closed)
Patch Set: Addressed comment Created Aug. 29, 2014, 10:18 p.m.
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1 /* 1 /*
2 * This file is part of Adblock Plus <http://adblockplus.org/>, 2 * This file is part of Adblock Plus <http://adblockplus.org/>,
3 * Copyright (C) 2006-2014 Eyeo GmbH 3 * Copyright (C) 2006-2014 Eyeo GmbH
4 * 4 *
5 * Adblock Plus is free software: you can redistribute it and/or modify 5 * Adblock Plus is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 3 as 6 * it under the terms of the GNU General Public License version 3 as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
8 * 8 *
9 * Adblock Plus is distributed in the hope that it will be useful, 9 * Adblock Plus is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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107 107
108 // Remove filename and add relative URL to it 108 // Remove filename and add relative URL to it
109 var base = document.baseURI.match(/.+\//); 109 var base = document.baseURI.match(/.+\//);
110 if (!base) 110 if (!base)
111 return document.baseURI + "/" + url; 111 return document.baseURI + "/" + url;
112 return base[0] + url; 112 return base[0] + url;
113 } 113 }
114 114
115 function init(document) 115 function init(document)
116 { 116 {
117 var canUseShadow = "webkitCreateShadowRoot" in document.documentElement; 117 // prior to Chrome 37, content scripts don't run on about:blank
118 var fixInlineFrames = false; 118 // and about:srcdoc. So we have to apply element hiding and collapsing
119 119 // from the parent frame, when inline frames are loaded.
120 var match = navigator.userAgent.match(/\bChrome\/(\d+)/); 120 var match = navigator.userAgent.match(/\bChrome\/(\d+)/);
121 if (match) 121 var fixInlineFrames = match && parseInt(match[1]) < 37);
122 {
123 var chromeVersion = parseInt(match[1]);
124
125 // the <shadow> element is ignored in Chrome 32 (#309). Also Chrome 31-33
126 // crashes in some situations on some pages when using shadow DOM (#498).
127 // So we must not use Shadow DOM on those versions of Chrome.
128 if (chromeVersion >= 31 && chromeVersion <= 33)
129 canUseShadow = false;
130
131 // prior to Chrome 37, content scripts don't run on about:blank
132 // and about:srcdoc. So we have to apply element hiding and collapsing
133 // from the parent frame, when inline frames are loaded.
134 if (chromeVersion < 37)
135 fixInlineFrames = true;
136 }
137 122
138 // use Shadow DOM if available to don't mess with web pages that 123 // use Shadow DOM if available to don't mess with web pages that
139 // rely on the order of their own <style> tags (#309). However we 124 // rely on the order of their own <style> tags (#309). However we
140 // must not create the shadow root in the response callback passed 125 // must not create the shadow root in the response callback passed
141 // to sendMessage(), otherwise Chrome breaks some websites (#450). 126 // to sendMessage(), otherwise Chrome breaks some websites (#450).
142 if (canUseShadow) 127 var shadow = null;
128 if ("createShadowRoot" in document.documentElement)
143 { 129 {
144 var shadow = document.documentElement.webkitCreateShadowRoot(); 130 shadow = document.documentElement.createShadowRoot();
145 shadow.appendChild(document.createElement("shadow")); 131 shadow.appendChild(document.createElement("shadow"));
146 } 132 }
147 133
148 // Sets the currently used CSS rules for elemhide filters 134 // Sets the currently used CSS rules for elemhide filters
149 var setElemhideCSSRules = function(selectors) 135 var setElemhideCSSRules = function(selectors)
150 { 136 {
151 if (selectors.length == 0) 137 if (selectors.length == 0)
152 return; 138 return;
153 139
154 var style = document.createElement("style"); 140 var style = document.createElement("style");
155 style.setAttribute("type", "text/css"); 141 style.setAttribute("type", "text/css");
156 142
157 if (canUseShadow) 143 if (shadow)
158 { 144 {
159 shadow.appendChild(style); 145 shadow.appendChild(style);
160 146
161 try 147 for (var i = 0; i < selectors.length; i++)
162 { 148 selectors[i] = "::content " + selectors[i];
163 document.querySelector("::content");
164
165 for (var i = 0; i < selectors.length; i++)
166 selectors[i] = "::content " + selectors[i];
167 }
168 catch (e)
169 {
170 for (var i = 0; i < selectors.length; i++)
171 selectors[i] = "::-webkit-distributed(" + selectors[i] + ")";
172 }
173 } 149 }
174 else 150 else
175 { 151 {
176 // Try to insert the style into the <head> tag, inserting directly under t he 152 // Try to insert the style into the <head> tag, inserting directly under t he
177 // document root breaks dev tools functionality: 153 // document root breaks dev tools functionality:
178 // http://code.google.com/p/chromium/issues/detail?id=178109 154 // http://code.google.com/p/chromium/issues/detail?id=178109
179 (document.head || document.documentElement).appendChild(style); 155 (document.head || document.documentElement).appendChild(style);
180 } 156 }
181 157
182 var setRules = function() 158 var setRules = function()
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223 }, true); 199 }, true);
224 200
225 ext.backgroundPage.sendMessage({type: "get-selectors"}, setElemhideCSSRules); 201 ext.backgroundPage.sendMessage({type: "get-selectors"}, setElemhideCSSRules);
226 } 202 }
227 203
228 if (document instanceof HTMLDocument) 204 if (document instanceof HTMLDocument)
229 { 205 {
230 checkExceptionKey(); 206 checkExceptionKey();
231 init(document); 207 init(document);
232 } 208 }
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