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Issue 29348869: Issue 4101 - Prevent runaway MutationObservers (Closed)
Patch Set: Rebased. Created Aug. 11, 2016, 1:49 p.m.
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1 /* 1 /*
2 * This file is part of Adblock Plus <https://adblockplus.org/>, 2 * This file is part of Adblock Plus <https://adblockplus.org/>,
3 * Copyright (C) 2006-2016 Eyeo GmbH 3 * Copyright (C) 2006-2016 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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143 type: "filters.collapse", 143 type: "filters.collapse",
144 urls: urls, 144 urls: urls,
145 mediatype: mediatype, 145 mediatype: mediatype,
146 baseURL: document.location.href 146 baseURL: document.location.href
147 }, 147 },
148 148
149 function(collapse) 149 function(collapse)
150 { 150 {
151 function collapseElement() 151 function collapseElement()
152 { 152 {
153 var propertyName = "display";
154 var propertyValue = "none";
153 if (element.localName == "frame") 155 if (element.localName == "frame")
154 element.style.setProperty("visibility", "hidden", "important"); 156 {
155 else 157 propertyName = "visibility";
156 element.style.setProperty("display", "none", "important"); 158 propertyValue = "hidden";
159 }
160
161 if (element.style.getPropertyValue(propertyName) !== propertyValue ||
162 element.style.getPropertyPriority(propertyName) !== "important")
163 element.style.setProperty(propertyName, propertyValue, "important");
157 } 164 }
158 165
159 if (collapse && !element._collapsed) 166 if (collapse && !element._collapsed)
160 { 167 {
161 collapseElement(); 168 collapseElement();
162 element._collapsed = true; 169 element._collapsed = true;
163 170
164 if (MutationObserver) 171 if (MutationObserver)
165 new MutationObserver(collapseElement).observe( 172 new MutationObserver(collapseElement).observe(
166 element, { 173 element, {
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608 }, true); 615 }, true);
609 616
610 return updateStylesheet; 617 return updateStylesheet;
611 } 618 }
612 619
613 if (document instanceof HTMLDocument) 620 if (document instanceof HTMLDocument)
614 { 621 {
615 checkSitekey(); 622 checkSitekey();
616 window.updateStylesheet = init(document); 623 window.updateStylesheet = init(document);
617 } 624 }
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