1 /* 2 * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org) 3 * (C) 1999 Antti Koivisto (koivisto (at) kde.org) 4 * (C) 2001 Dirk Mueller (mueller (at) kde.org) 5 * (C) 2006 Alexey Proskuryakov (ap (at) webkit.org) 6 * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved. 7 * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/) 8 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies) 9 * Copyright (C) 2013 Google Inc. All rights reserved. 10 * 11 * This library is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU Library General Public 13 * License as published by the Free Software Foundation; either 14 * version 2 of the License, or (at your option) any later version. 15 * 16 * This library is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * Library General Public License for more details. 20 * 21 * You should have received a copy of the GNU Library General Public License 22 * along with this library; see the file COPYING.LIB. If not, write to 23 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 24 * Boston, MA 02110-1301, USA. 25 */ 26 27 #include "config.h" 28 #include "core/dom/ShadowTreeStyleSheetCollection.h" 29 30 #include "core/HTMLNames.h" 31 #include "core/css/CSSStyleSheet.h" 32 #include "core/css/resolver/StyleResolver.h" 33 #include "core/dom/Element.h" 34 #include "core/dom/StyleEngine.h" 35 #include "core/dom/shadow/ShadowRoot.h" 36 #include "core/html/HTMLStyleElement.h" 37 38 namespace blink { 39 40 using namespace HTMLNames; 41 42 ShadowTreeStyleSheetCollection::ShadowTreeStyleSheetCollection(ShadowRoot& shadowRoot) 43 : TreeScopeStyleSheetCollection(shadowRoot) 44 { 45 } 46 47 void ShadowTreeStyleSheetCollection::collectStyleSheets(StyleEngine* engine, StyleSheetCollection& collection) 48 { 49 DocumentOrderedList::iterator begin = m_styleSheetCandidateNodes.begin(); 50 DocumentOrderedList::iterator end = m_styleSheetCandidateNodes.end(); 51 for (DocumentOrderedList::iterator it = begin; it != end; ++it) { 52 Node* node = *it; 53 StyleSheet* sheet = 0; 54 CSSStyleSheet* activeSheet = 0; 55 56 if (!isHTMLStyleElement(*node)) 57 continue; 58 59 HTMLStyleElement* element = toHTMLStyleElement(node); 60 const AtomicString& title = element->fastGetAttribute(titleAttr); 61 bool enabledViaScript = false; 62 63 sheet = element->sheet(); 64 if (sheet && !sheet->disabled() && sheet->isCSSStyleSheet()) 65 activeSheet = toCSSStyleSheet(sheet); 66 67 // FIXME: clarify how PREFERRED or ALTERNATE works in shadow trees. 68 // Should we set preferred/selected stylesheets name in shadow trees and 69 // use the name in document? 70 if (!enabledViaScript && sheet && !title.isEmpty()) { 71 if (engine->preferredStylesheetSetName().isEmpty()) { 72 engine->setPreferredStylesheetSetName(title); 73 engine->setSelectedStylesheetSetName(title); 74 } 75 if (title != engine->preferredStylesheetSetName()) 76 activeSheet = 0; 77 } 78 79 const AtomicString& rel = element->fastGetAttribute(relAttr); 80 if (rel.contains("alternate") && title.isEmpty()) 81 activeSheet = 0; 82 83 if (sheet) 84 collection.appendSheetForList(sheet); 85 if (activeSheet) 86 collection.appendActiveStyleSheet(activeSheet); 87 } 88 } 89 90 void ShadowTreeStyleSheetCollection::updateActiveStyleSheets(StyleEngine* engine, StyleResolverUpdateMode updateMode) 91 { 92 StyleSheetCollection collection; 93 collectStyleSheets(engine, collection); 94 95 StyleSheetChange change; 96 analyzeStyleSheetChange(updateMode, collection, change); 97 98 if (StyleResolver* styleResolver = engine->resolver()) { 99 if (change.styleResolverUpdateType != Additive) { 100 // We should not destroy StyleResolver when we find any stylesheet update in a shadow tree. 101 // In this case, we will reset rulesets created from style elements in the shadow tree. 102 styleResolver->resetAuthorStyle(treeScope()); 103 styleResolver->removePendingAuthorStyleSheets(m_activeAuthorStyleSheets); 104 styleResolver->lazyAppendAuthorStyleSheets(0, collection.activeAuthorStyleSheets()); 105 } else { 106 styleResolver->lazyAppendAuthorStyleSheets(m_activeAuthorStyleSheets.size(), collection.activeAuthorStyleSheets()); 107 } 108 } 109 if (change.requiresFullStyleRecalc) 110 toShadowRoot(treeScope().rootNode()).host()->setNeedsStyleRecalc(SubtreeStyleChange); 111 112 collection.swap(*this); 113 updateUsesRemUnits(); 114 } 115 116 } 117