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Issue 5666188336037888: Issue 581 - Fixed element hiding/collapsing in anonymous frames on Chrome (Closed)
Patch Set: Addressed comments Created June 17, 2014, 2:12 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
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details. 12 * GNU General Public License for more details.
13 * 13 *
14 * You should have received a copy of the GNU General Public License 14 * You should have received a copy of the GNU General Public License
15 * along with Adblock Plus. If not, see <http://www.gnu.org/licenses/>. 15 * along with Adblock Plus. If not, see <http://www.gnu.org/licenses/>.
16 */ 16 */
17 17
18 var SELECTOR_GROUP_SIZE = 20; 18 var SELECTOR_GROUP_SIZE = 20;
19 19
20 // use Shadow DOM if available to don't mess with web pages that
21 // rely on the order of their own <style> tags. However
22 // the <shadow> element is broken in some Chrome 32 builds (#309)
23 //
24 // also Chrome 31-33 crashes in some situations on some pages when using
25 // ShadowDOM, e.g. when pressing tab key on Wikipedia and Facebook (#498)
26 //
27 // also we must not create the shadow root in the response callback passed
28 // to sendMessage(), otherwise Chrome breaks some websites (#450)
29 var shadow = null;
30 if ("webkitCreateShadowRoot" in document.documentElement && !/\bChrome\/3[1-3]\b /.test(navigator.userAgent))
31 {
32 shadow = document.documentElement.webkitCreateShadowRoot();
33 shadow.appendChild(document.createElement("shadow"));
34 }
35
36 // Sets the currently used CSS rules for elemhide filters
37 function setElemhideCSSRules(selectors)
38 {
39 if (selectors.length == 0)
40 return;
41
42 var style = document.createElement("style");
43 style.setAttribute("type", "text/css");
44
45 if (shadow)
46 {
47 shadow.appendChild(style);
48
49 try
50 {
51 document.querySelector("::content");
52
53 for (var i = 0; i < selectors.length; i++)
54 selectors[i] = "::content " + selectors[i];
55 }
56 catch (e)
57 {
58 for (var i = 0; i < selectors.length; i++)
59 selectors[i] = "::-webkit-distributed(" + selectors[i] + ")";
60 }
61 }
62 else
63 {
64 // Try to insert the style into the <head> tag, inserting directly under the
65 // document root breaks dev tools functionality:
66 // http://code.google.com/p/chromium/issues/detail?id=178109
67 (document.head || document.documentElement).appendChild(style);
68 }
69
70 // WebKit apparently chokes when the selector list in a CSS rule is huge.
71 // So we split the elemhide selectors into groups.
72 for (var i = 0; selectors.length > 0; i++)
73 {
74 var selector = selectors.splice(0, SELECTOR_GROUP_SIZE).join(", ");
75 style.sheet.insertRule(selector + " { display: none !important; }", i);
76 }
77 }
78
79 var typeMap = { 20 var typeMap = {
80 "img": "IMAGE", 21 "img": "IMAGE",
81 "input": "IMAGE", 22 "input": "IMAGE",
82 "audio": "MEDIA", 23 "audio": "MEDIA",
83 "video": "MEDIA", 24 "video": "MEDIA",
84 "frame": "SUBDOCUMENT", 25 "frame": "SUBDOCUMENT",
85 "iframe": "SUBDOCUMENT" 26 "iframe": "SUBDOCUMENT"
86 }; 27 };
87 28
88 function checkCollapse(event) 29 function checkCollapse(element)
89 { 30 {
90 var target = event.target; 31 var tag = element.localName;
91 var tag = target.localName; 32 if (tag in typeMap)
92 var expectedEvent = (tag == "iframe" || tag == "frame" ? "load" : "error");
93 if (tag in typeMap && event.type == expectedEvent)
94 { 33 {
95 // This element failed loading, did we block it? 34 // This element failed loading, did we block it?
96 var url = target.src; 35 var url = element.src;
97 if (!url) 36 if (!url)
98 return; 37 return;
99 38
100 ext.backgroundPage.sendMessage( 39 ext.backgroundPage.sendMessage(
101 { 40 {
102 type: "should-collapse", 41 type: "should-collapse",
103 url: url, 42 url: url,
104 mediatype: typeMap[tag] 43 mediatype: typeMap[tag]
105 }, 44 },
106 45
107 function(response) 46 function(response)
108 { 47 {
109 if (response && target.parentNode) 48 if (response && element.parentNode)
110 { 49 {
111 // <frame> cannot be removed, doing that will mess up the frameset 50 // <frame> cannot be removed, doing that will mess up the frameset
112 if (tag == "frame") 51 if (tag == "frame")
113 target.style.setProperty("visibility", "hidden", "important"); 52 element.style.setProperty("visibility", "hidden", "important");
114 else 53 else
115 target.style.setProperty("display", "none", "important"); 54 element.style.setProperty("display", "none", "important");
116 } 55 }
117 } 56 }
118 ); 57 );
119 } 58 }
120 } 59 }
121 60
61 function checkExceptionKey()
62 {
63 var attr = document.documentElement.getAttribute("data-adblockkey");
64 if (attr)
65 ext.backgroundPage.sendMessage({type: "add-key-exception", token: attr});
66 }
67
68 function hasInlineURL(element, attribute)
69 {
70 var value = element.getAttribute(attribute);
71 return value == null || /^\s*(javascript:|about:|$)/i.test(value);
72 }
73
74 function isInlineFrame(element)
75 {
76 switch (element.localName)
77 {
78 case "iframe":
79 return hasInlineURL(element, "src") || element.hasAttribute("srcdoc");
80 case "frame":
81 return hasInlineURL(element, "src");
82 case "object":
83 return hasInlineURL(element, "data") && element.contentDocument;
84 default:
85 return false;
86 }
87 }
88
122 // Converts relative to absolute URL 89 // Converts relative to absolute URL
123 // e.g.: foo.swf on http://example.com/whatever/bar.html 90 // e.g.: foo.swf on http://example.com/whatever/bar.html
124 // -> http://example.com/whatever/foo.swf 91 // -> http://example.com/whatever/foo.swf
125 function relativeToAbsoluteUrl(url) 92 function relativeToAbsoluteUrl(url)
126 { 93 {
127 // If URL is already absolute, don't mess with it 94 // If URL is already absolute, don't mess with it
128 if (!url || /^[\w\-]+:/i.test(url)) 95 if (!url || /^[\w\-]+:/i.test(url))
129 return url; 96 return url;
130 97
131 // Leading / means absolute path 98 // Leading / means absolute path
132 // Leading // means network path 99 // Leading // means network path
133 if (url[0] == '/') 100 if (url[0] == '/')
134 { 101 {
135 if (url[1] == '/') 102 if (url[1] == '/')
136 return document.location.protocol + url; 103 return document.location.protocol + url;
137 else 104 else
138 return document.location.protocol + "//" + document.location.host + url; 105 return document.location.protocol + "//" + document.location.host + url;
139 } 106 }
140 107
141 // Remove filename and add relative URL to it 108 // Remove filename and add relative URL to it
142 var base = document.baseURI.match(/.+\//); 109 var base = document.baseURI.match(/.+\//);
143 if (!base) 110 if (!base)
144 return document.baseURI + "/" + url; 111 return document.baseURI + "/" + url;
145 return base[0] + url; 112 return base[0] + url;
146 } 113 }
147 114
148 function init() 115 function init(document)
149 { 116 {
150 // Make sure this is really an HTML page, as Chrome runs these scripts on just about everything 117 var canUseShadow = "webkitCreateShadowRoot" in document.documentElement;
151 if (!(document.documentElement instanceof HTMLElement)) 118 var fixInlineFrames = false;
152 return;
153 119
154 document.addEventListener("error", checkCollapse, true); 120 var match = navigator.userAgent.match(/\bChrome\/(\d+)/);
155 document.addEventListener("load", checkCollapse, true); 121 if (match)
122 {
123 var chromeVersion = parseInt(match[1]);
156 124
157 var attr = document.documentElement.getAttribute("data-adblockkey"); 125 // the <shadow> element is ignored in Chrome 32 (#309). Also Chrome 31-33
158 if (attr) 126 // crashes in some situations on some pages when using shadow DOM (#498).
159 ext.backgroundPage.sendMessage({type: "add-key-exception", token: attr}); 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
138 // 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
140 // must not create the shadow root in the response callback passed
141 // to sendMessage(), otherwise Chrome breaks some websites (#450).
142 if (canUseShadow)
143 {
144 var shadow = document.documentElement.webkitCreateShadowRoot();
145 shadow.appendChild(document.createElement("shadow"));
146 }
147
148 // Sets the currently used CSS rules for elemhide filters
149 var setElemhideCSSRules = function(selectors)
150 {
151 if (selectors.length == 0)
152 return;
153
154 var style = document.createElement("style");
155 style.setAttribute("type", "text/css");
156
157 if (canUseShadow)
158 {
159 shadow.appendChild(style);
160
161 try
162 {
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 }
174 else
175 {
176 // Try to insert the style into the <head> tag, inserting directly under t he
177 // document root breaks dev tools functionality:
178 // http://code.google.com/p/chromium/issues/detail?id=178109
179 (document.head || document.documentElement).appendChild(style);
180 }
181
182 var setRules = function()
183 {
184 // The sheet property might not exist yet if the
185 // <style> element was created for a sub frame
186 if (!style.sheet)
187 {
188 setTimeout(setRules, 0);
189 return;
190 }
191
192 // WebKit apparently chokes when the selector list in a CSS rule is huge.
193 // So we split the elemhide selectors into groups.
194 for (var i = 0; selectors.length > 0; i++)
195 {
196 var selector = selectors.splice(0, SELECTOR_GROUP_SIZE).join(", ");
197 style.sheet.insertRule(selector + " { display: none !important; }", i);
198 }
199 };
200
201 setRules();
202 };
203
204 document.addEventListener("error", function(event)
205 {
206 checkCollapse(event.target);
207 }, true);
208
209 document.addEventListener("load", function(event)
210 {
211 var element = event.target;
212
213 if (/^i?frame$/.test(element.localName))
214 checkCollapse(element);
215
216 if (fixInlineFrames && isInlineFrame(element))
217 {
218 init(element.contentDocument);
219
220 for (var tagName in typeMap)
221 Array.prototype.forEach.call(element.contentDocument.getElementsByTagNam e(tagName), checkCollapse);
222 }
223 }, true);
160 224
161 ext.backgroundPage.sendMessage({type: "get-selectors"}, setElemhideCSSRules); 225 ext.backgroundPage.sendMessage({type: "get-selectors"}, setElemhideCSSRules);
162 } 226 }
163 227
164 // In Chrome 18 the document might not be initialized yet 228 if (document.documentElement instanceof HTMLElement)
165 if (document.documentElement) 229 {
166 init(); 230 checkExceptionKey();
167 else 231 init(document);
168 window.setTimeout(init, 0); 232 }
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