1/* 2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org) 3 * (C) 1999 Antti Koivisto (koivisto@kde.org) 4 * (C) 2001 Dirk Mueller (mueller@kde.org) 5 * (C) 2006 Alexey Proskuryakov (ap@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 "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#include "core/frame/Settings.h" 38 39namespace WebCore { 40 41using namespace HTMLNames; 42 43ShadowTreeStyleSheetCollection::ShadowTreeStyleSheetCollection(ShadowRoot& shadowRoot) 44 : StyleSheetCollection(shadowRoot) 45{ 46} 47 48void ShadowTreeStyleSheetCollection::collectStyleSheets(StyleEngine* engine, StyleSheetCollectionBase& collection) 49{ 50 DocumentOrderedList::iterator begin = m_styleSheetCandidateNodes.begin(); 51 DocumentOrderedList::iterator end = m_styleSheetCandidateNodes.end(); 52 for (DocumentOrderedList::iterator it = begin; it != end; ++it) { 53 Node* node = *it; 54 StyleSheet* sheet = 0; 55 CSSStyleSheet* activeSheet = 0; 56 57 if (!node->isHTMLElement() || !node->hasTagName(styleTag)) 58 continue; 59 60 Element* element = toElement(node); 61 AtomicString title = element->getAttribute(titleAttr); 62 bool enabledViaScript = false; 63 64 sheet = toHTMLStyleElement(node)->sheet(); 65 if (sheet && !sheet->disabled() && sheet->isCSSStyleSheet()) 66 activeSheet = toCSSStyleSheet(sheet); 67 68 // FIXME: clarify how PREFERRED or ALTERNATE works in shadow trees. 69 // Should we set preferred/selected stylesheets name in shadow trees and 70 // use the name in document? 71 AtomicString rel = element->getAttribute(relAttr); 72 if (!enabledViaScript && sheet && !title.isEmpty()) { 73 if (engine->preferredStylesheetSetName().isEmpty()) { 74 if (element->hasLocalName(styleTag) || !rel.contains("alternate")) { 75 engine->setPreferredStylesheetSetName(title); 76 engine->setSelectedStylesheetSetName(title); 77 } 78 } 79 if (title != engine->preferredStylesheetSetName()) 80 activeSheet = 0; 81 } 82 83 if (rel.contains("alternate") && title.isEmpty()) 84 activeSheet = 0; 85 86 if (sheet) 87 collection.appendSheetForList(sheet); 88 if (activeSheet) 89 collection.appendActiveStyleSheet(activeSheet); 90 } 91} 92 93bool ShadowTreeStyleSheetCollection::updateActiveStyleSheets(StyleEngine* engine, StyleResolverUpdateMode updateMode) 94{ 95 StyleSheetCollectionBase collection; 96 collectStyleSheets(engine, collection); 97 98 StyleSheetChange change; 99 analyzeStyleSheetChange(updateMode, collection, change); 100 101 if (StyleResolver* styleResolver = engine->resolver()) { 102 // FIXME: We might have already had styles in child treescope. In this case, we cannot use buildScopedStyleTreeInDocumentOrder. 103 // Need to change "false" to some valid condition. 104 styleResolver->setBuildScopedStyleTreeInDocumentOrder(false); 105 if (change.styleResolverUpdateType != Additive) { 106 // We should not destroy StyleResolver when we find any stylesheet update in a shadow tree. 107 // In this case, we will reset rulesets created from style elements in the shadow tree. 108 resetAllRuleSetsInTreeScope(styleResolver); 109 styleResolver->removePendingAuthorStyleSheets(m_activeAuthorStyleSheets); 110 styleResolver->lazyAppendAuthorStyleSheets(0, collection.activeAuthorStyleSheets()); 111 } else { 112 styleResolver->lazyAppendAuthorStyleSheets(m_activeAuthorStyleSheets.size(), collection.activeAuthorStyleSheets()); 113 } 114 } 115 if (change.requiresFullStyleRecalc) 116 toShadowRoot(m_treeScope.rootNode())->host()->setNeedsStyleRecalc(); 117 118 m_scopingNodesForStyleScoped.didRemoveScopingNodes(); 119 collection.swap(*this); 120 updateUsesRemUnits(); 121 122 return change.requiresFullStyleRecalc; 123} 124 125} 126