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Issue 5666188336037888: Issue 581 - Fixed element hiding/collapsing in anonymous frames on Chrome (Closed)
Patch Set: Fixed accidental global variable Created May 30, 2014, 1:05 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
122 // Converts relative to absolute URL 68 // Converts relative to absolute URL
123 // e.g.: foo.swf on http://example.com/whatever/bar.html 69 // e.g.: foo.swf on http://example.com/whatever/bar.html
124 // -> http://example.com/whatever/foo.swf 70 // -> http://example.com/whatever/foo.swf
125 function relativeToAbsoluteUrl(url) 71 function relativeToAbsoluteUrl(url)
126 { 72 {
127 // If URL is already absolute, don't mess with it 73 // If URL is already absolute, don't mess with it
128 if (!url || /^[\w\-]+:/i.test(url)) 74 if (!url || /^[\w\-]+:/i.test(url))
129 return url; 75 return url;
130 76
131 // Leading / means absolute path 77 // Leading / means absolute path
132 // Leading // means network path 78 // Leading // means network path
133 if (url[0] == '/') 79 if (url[0] == '/')
134 { 80 {
135 if (url[1] == '/') 81 if (url[1] == '/')
136 return document.location.protocol + url; 82 return document.location.protocol + url;
137 else 83 else
138 return document.location.protocol + "//" + document.location.host + url; 84 return document.location.protocol + "//" + document.location.host + url;
139 } 85 }
140 86
141 // Remove filename and add relative URL to it 87 // Remove filename and add relative URL to it
142 var base = document.baseURI.match(/.+\//); 88 var base = document.baseURI.match(/.+\//);
143 if (!base) 89 if (!base)
144 return document.baseURI + "/" + url; 90 return document.baseURI + "/" + url;
145 return base[0] + url; 91 return base[0] + url;
146 } 92 }
147 93
148 function init() 94 function init(document)
149 { 95 {
150 // Make sure this is really an HTML page, as Chrome runs these scripts on just about everything 96 // use Shadow DOM if available to don't mess with web pages that
151 if (!(document.documentElement instanceof HTMLElement)) 97 // rely on the order of their own <style> tags. However
152 return; 98 // the <shadow> element is broken in some Chrome 32 builds (#309)
99 //
100 // also Chrome 31-33 crashes in some situations on some pages when using
101 // ShadowDOM, e.g. when pressing tab key on Wikipedia and Facebook (#498)
102 //
103 // also we must not create the shadow root in the response callback passed
104 // to sendMessage(), otherwise Chrome breaks some websites (#450)
105 var shadow = null;
106 if ("webkitCreateShadowRoot" in document.documentElement && !/\bChrome\/3[1-3] \b/.test(navigator.userAgent))
107 {
108 shadow = document.documentElement.webkitCreateShadowRoot();
109 shadow.appendChild(document.createElement("shadow"));
110 }
153 111
154 document.addEventListener("error", checkCollapse, true); 112 // Sets the currently used CSS rules for elemhide filters
155 document.addEventListener("load", checkCollapse, true); 113 var setElemhideCSSRules = function(selectors)
114 {
115 if (selectors.length == 0)
116 return;
156 117
157 var attr = document.documentElement.getAttribute("data-adblockkey"); 118 var style = document.createElement("style");
158 if (attr) 119 style.setAttribute("type", "text/css");
159 ext.backgroundPage.sendMessage({type: "add-key-exception", token: attr}); 120
121 if (shadow)
122 {
123 shadow.appendChild(style);
124
125 try
126 {
127 document.querySelector("::content");
128
129 for (var i = 0; i < selectors.length; i++)
130 selectors[i] = "::content " + selectors[i];
131 }
132 catch (e)
133 {
134 for (var i = 0; i < selectors.length; i++)
135 selectors[i] = "::-webkit-distributed(" + selectors[i] + ")";
136 }
137 }
138 else
139 {
140 // Try to insert the style into the <head> tag, inserting directly under t he
141 // document root breaks dev tools functionality:
142 // http://code.google.com/p/chromium/issues/detail?id=178109
143 (document.head || document.documentElement).appendChild(style);
144 }
145
146 var setRules = function()
147 {
148 // The sheet property might not exist yet if the
149 // <style> element was created for a sub frame
150 if (!style.sheet)
151 {
152 setTimeout(setRules, 0);
153 return;
154 }
155
156 // WebKit apparently chokes when the selector list in a CSS rule is huge.
157 // So we split the elemhide selectors into groups.
158 for (var i = 0; selectors.length > 0; i++)
159 {
160 var selector = selectors.splice(0, SELECTOR_GROUP_SIZE).join(", ");
161 style.sheet.insertRule(selector + " { display: none !important; }", i);
162 }
163 };
164
165 setRules();
166 };
167
168 document.addEventListener("error", function(event)
169 {
170 checkCollapse(event.target);
171 }, true);
172
173 document.addEventListener("load", function(event)
174 {
175 if (/^i?frame$/.test(event.target.localName))
176 {
177 checkCollapse(event.target);
178
179 // Chrome doesn't run our content script on anonymous frames.
180 // So we have to apply element hiding and collapsing from the
181 // parent frame, when an anonymous sub frame loaded.
182 if (/^(javascript:|$)/.test(event.target.src) && /\bChrome\//.test(navigat or.userAgent))
183 {
184 var contentDocument = event.target.contentDocument;
185
186 if (contentDocument.documentElement instanceof HTMLElement)
187 {
188 init(contentDocument);
189
190 for (var tagName in typeMap)
191 Array.prototype.forEach.call(contentDocument.getElementsByTagName(ta gName), checkCollapse);
192 }
193 }
194 }
195 }, true);
160 196
161 ext.backgroundPage.sendMessage({type: "get-selectors"}, setElemhideCSSRules); 197 ext.backgroundPage.sendMessage({type: "get-selectors"}, setElemhideCSSRules);
162 } 198 }
163 199
164 // In Chrome 18 the document might not be initialized yet 200 if (document.documentElement instanceof HTMLElement)
165 if (document.documentElement) 201 {
166 init(); 202 checkExceptionKey();
167 else 203 init(document);
168 window.setTimeout(init, 0); 204 }
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