| /* |
| * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 1999 Antti Koivisto (koivisto@kde.org) |
| * (C) 2001 Dirk Mueller (mueller@kde.org) |
| * (C) 2006 Alexey Proskuryakov (ap@webkit.org) |
| * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved. |
| * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/) |
| * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies) |
| * Copyright (C) 2013 Google Inc. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "config.h" |
| #include "core/dom/DocumentStyleSheetCollection.h" |
| |
| #include "HTMLNames.h" |
| #include "RuntimeEnabledFeatures.h" |
| #include "SVGNames.h" |
| #include "core/css/CSSStyleSheet.h" |
| #include "core/css/resolver/StyleResolver.h" |
| #include "core/dom/Document.h" |
| #include "core/dom/Element.h" |
| #include "core/dom/ProcessingInstruction.h" |
| #include "core/dom/StyleEngine.h" |
| #include "core/html/HTMLIFrameElement.h" |
| #include "core/html/HTMLLinkElement.h" |
| #include "core/html/HTMLStyleElement.h" |
| #include "core/page/Settings.h" |
| #include "core/svg/SVGStyleElement.h" |
| |
| namespace WebCore { |
| |
| using namespace HTMLNames; |
| |
| DocumentStyleSheetCollection::DocumentStyleSheetCollection(TreeScope& treeScope) |
| : StyleSheetCollection(treeScope) |
| { |
| ASSERT(treeScope.rootNode() == treeScope.rootNode()->document()); |
| } |
| |
| void DocumentStyleSheetCollection::collectStyleSheetsFromCandidates(StyleEngine* engine, StyleSheetCollectionBase& collection, DocumentStyleSheetCollection::CollectFor collectFor) |
| { |
| DocumentOrderedList::iterator begin = m_styleSheetCandidateNodes.begin(); |
| DocumentOrderedList::iterator end = m_styleSheetCandidateNodes.end(); |
| for (DocumentOrderedList::iterator it = begin; it != end; ++it) { |
| Node* n = *it; |
| StyleSheet* sheet = 0; |
| CSSStyleSheet* activeSheet = 0; |
| if (n->nodeType() == Node::PROCESSING_INSTRUCTION_NODE && !document()->isHTMLDocument()) { |
| // Processing instruction (XML documents only). |
| // We don't support linking to embedded CSS stylesheets, see <https://bugs.webkit.org/show_bug.cgi?id=49281> for discussion. |
| ProcessingInstruction* pi = toProcessingInstruction(n); |
| // Don't apply XSL transforms to already transformed documents -- <rdar://problem/4132806> |
| if (RuntimeEnabledFeatures::xsltEnabled() && pi->isXSL() && !document()->transformSourceDocument()) { |
| // Don't apply XSL transforms until loading is finished. |
| if (!document()->parsing() && !pi->isLoading()) |
| document()->applyXSLTransform(pi); |
| return; |
| } |
| sheet = pi->sheet(); |
| if (sheet && !sheet->disabled() && sheet->isCSSStyleSheet()) |
| activeSheet = toCSSStyleSheet(sheet); |
| } else if ((n->isHTMLElement() && (n->hasTagName(linkTag) || n->hasTagName(styleTag))) || (n->isSVGElement() && n->hasTagName(SVGNames::styleTag))) { |
| Element* e = toElement(n); |
| AtomicString title = e->getAttribute(titleAttr); |
| bool enabledViaScript = false; |
| if (e->hasLocalName(linkTag)) { |
| // <LINK> element |
| HTMLLinkElement* linkElement = toHTMLLinkElement(n); |
| enabledViaScript = linkElement->isEnabledViaScript(); |
| if (!linkElement->isDisabled() && linkElement->styleSheetIsLoading()) { |
| // it is loading but we should still decide which style sheet set to use |
| if (!enabledViaScript && !title.isEmpty() && engine->preferredStylesheetSetName().isEmpty()) { |
| const AtomicString& rel = e->getAttribute(relAttr); |
| if (!rel.contains("alternate")) { |
| engine->setPreferredStylesheetSetName(title); |
| engine->setSelectedStylesheetSetName(title); |
| } |
| } |
| |
| continue; |
| } |
| sheet = linkElement->sheet(); |
| if (!sheet) |
| title = nullAtom; |
| } else if (n->isSVGElement() && n->hasTagName(SVGNames::styleTag)) { |
| sheet = toSVGStyleElement(n)->sheet(); |
| } else { |
| sheet = toHTMLStyleElement(n)->sheet(); |
| } |
| |
| if (sheet && !sheet->disabled() && sheet->isCSSStyleSheet()) |
| activeSheet = toCSSStyleSheet(sheet); |
| |
| // Check to see if this sheet belongs to a styleset |
| // (thus making it PREFERRED or ALTERNATE rather than |
| // PERSISTENT). |
| AtomicString rel = e->getAttribute(relAttr); |
| if (!enabledViaScript && sheet && !title.isEmpty()) { |
| // Yes, we have a title. |
| if (engine->preferredStylesheetSetName().isEmpty()) { |
| // No preferred set has been established. If |
| // we are NOT an alternate sheet, then establish |
| // us as the preferred set. Otherwise, just ignore |
| // this sheet. |
| if (e->hasLocalName(styleTag) || !rel.contains("alternate")) { |
| engine->setPreferredStylesheetSetName(title); |
| engine->setSelectedStylesheetSetName(title); |
| } |
| } |
| if (title != engine->preferredStylesheetSetName()) |
| activeSheet = 0; |
| } |
| |
| if (rel.contains("alternate") && title.isEmpty()) |
| activeSheet = 0; |
| } |
| |
| if (sheet && collectFor == CollectForList) |
| collection.appendSheetForList(sheet); |
| if (activeSheet) |
| collection.appendActiveStyleSheet(activeSheet); |
| } |
| } |
| |
| static void collectActiveCSSStyleSheetsFromSeamlessParents(StyleSheetCollectionBase& collection, Document* document) |
| { |
| HTMLIFrameElement* seamlessParentIFrame = document->seamlessParentIFrame(); |
| if (!seamlessParentIFrame) |
| return; |
| collection.appendActiveStyleSheets(seamlessParentIFrame->document().styleEngine()->activeAuthorStyleSheets()); |
| } |
| |
| void DocumentStyleSheetCollection::collectStyleSheets(StyleEngine* engine, StyleSheetCollectionBase& collection, DocumentStyleSheetCollection::CollectFor colletFor) |
| { |
| ASSERT(document()->styleEngine() == engine); |
| collection.appendActiveStyleSheets(engine->injectedAuthorStyleSheets()); |
| collection.appendActiveStyleSheets(engine->documentAuthorStyleSheets()); |
| collectActiveCSSStyleSheetsFromSeamlessParents(collection, document()); |
| collectStyleSheetsFromCandidates(engine, collection, colletFor); |
| } |
| |
| bool DocumentStyleSheetCollection::updateActiveStyleSheets(StyleEngine* engine, StyleResolverUpdateMode updateMode) |
| { |
| StyleSheetCollectionBase collection; |
| engine->collectDocumentActiveStyleSheets(collection); |
| |
| StyleSheetChange change; |
| analyzeStyleSheetChange(updateMode, collection, change); |
| |
| if (change.styleResolverUpdateType == Reconstruct) { |
| engine->clearMasterResolver(); |
| engine->resetFontSelector(); |
| } else if (StyleResolver* styleResolver = engine->resolver()) { |
| // FIXME: We might have already had styles in child treescope. In this case, we cannot use buildScopedStyleTreeInDocumentOrder. |
| // Need to change "false" to some valid condition. |
| styleResolver->setBuildScopedStyleTreeInDocumentOrder(false); |
| if (change.styleResolverUpdateType != Additive) { |
| ASSERT(change.styleResolverUpdateType == Reset || change.styleResolverUpdateType == ResetStyleResolverAndFontSelector); |
| resetAllRuleSetsInTreeScope(styleResolver); |
| if (change.styleResolverUpdateType == ResetStyleResolverAndFontSelector) |
| engine->resetFontSelector(); |
| styleResolver->removePendingAuthorStyleSheets(m_activeAuthorStyleSheets); |
| styleResolver->lazyAppendAuthorStyleSheets(0, collection.activeAuthorStyleSheets()); |
| } else { |
| styleResolver->lazyAppendAuthorStyleSheets(m_activeAuthorStyleSheets.size(), collection.activeAuthorStyleSheets()); |
| } |
| } else if (change.styleResolverUpdateType == ResetStyleResolverAndFontSelector) { |
| engine->resetFontSelector(); |
| } |
| m_scopingNodesForStyleScoped.didRemoveScopingNodes(); |
| collection.swap(*this); |
| updateUsesRemUnits(); |
| |
| return change.requiresFullStyleRecalc; |
| } |
| |
| } |
