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/*
* 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) 2011 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.
*
*/
#ifndef StyleEngine_h
#define StyleEngine_h
#include "core/css/resolver/StyleResolver.h"
#include "core/dom/Document.h"
#include "core/dom/DocumentOrderedList.h"
#include "core/dom/DocumentStyleSheetCollection.h"
#include "wtf/FastAllocBase.h"
#include "wtf/ListHashSet.h"
#include "wtf/RefPtr.h"
#include "wtf/TemporaryChange.h"
#include "wtf/Vector.h"
#include "wtf/text/WTFString.h"
namespace WebCore {
class CSSFontSelector;
class CSSStyleSheet;
class FontSelector;
class Node;
class RuleFeatureSet;
class ShadowTreeStyleSheetCollection;
class StyleResolver;
class StyleSheet;
class StyleSheetCollection;
class StyleSheetContents;
class StyleSheetList;
class StyleResolverChange {
public:
StyleResolverChange()
: m_needsRepaint(false)
, m_needsStyleRecalc(false)
{ }
bool needsRepaint() const { return m_needsRepaint; }
bool needsStyleRecalc() const { return m_needsStyleRecalc; }
void setNeedsRepaint() { m_needsRepaint = true; }
void setNeedsStyleRecalc() { m_needsStyleRecalc = true; }
private:
bool m_needsRepaint;
bool m_needsStyleRecalc;
};
class StyleEngine {
WTF_MAKE_FAST_ALLOCATED;
public:
class IgnoringPendingStylesheet : public TemporaryChange<bool> {
public:
IgnoringPendingStylesheet(StyleEngine* engine)
: TemporaryChange<bool>(engine->m_ignorePendingStylesheets, true)
{
}
};
friend class IgnoringPendingStylesheet;
static PassOwnPtr<StyleEngine> create(Document& document) { return adoptPtr(new StyleEngine(document)); }
~StyleEngine();
const Vector<RefPtr<StyleSheet> >& styleSheetsForStyleSheetList(TreeScope&);
const Vector<RefPtr<CSSStyleSheet> >& activeAuthorStyleSheets() const;
const Vector<RefPtr<CSSStyleSheet> >& documentAuthorStyleSheets() const { return m_authorStyleSheets; }
const Vector<RefPtr<CSSStyleSheet> >& injectedAuthorStyleSheets() const;
void modifiedStyleSheet(StyleSheet*);
void addStyleSheetCandidateNode(Node*, bool createdByParser);
void removeStyleSheetCandidateNode(Node*, ContainerNode* scopingNode = 0);
void modifiedStyleSheetCandidateNode(Node*);
void invalidateInjectedStyleSheetCache();
void updateInjectedStyleSheetCache() const;
void addAuthorSheet(PassRefPtr<StyleSheetContents> authorSheet);
bool needsUpdateActiveStylesheetsOnStyleRecalc() const { return m_needsUpdateActiveStylesheetsOnStyleRecalc; }
void clearMediaQueryRuleSetStyleSheets();
bool updateActiveStyleSheets(StyleResolverUpdateMode);
String preferredStylesheetSetName() const { return m_preferredStylesheetSetName; }
String selectedStylesheetSetName() const { return m_selectedStylesheetSetName; }
void setPreferredStylesheetSetName(const String& name) { m_preferredStylesheetSetName = name; }
void setSelectedStylesheetSetName(const String& name) { m_selectedStylesheetSetName = name; }
void addPendingSheet();
enum RemovePendingSheetNotificationType {
RemovePendingSheetNotifyImmediately,
RemovePendingSheetNotifyLater
};
void removePendingSheet(Node* styleSheetCandidateNode, RemovePendingSheetNotificationType = RemovePendingSheetNotifyImmediately);
bool hasPendingSheets() const { return m_pendingStylesheets > 0; }
bool haveStylesheetsLoaded() const { return !hasPendingSheets() || m_ignorePendingStylesheets; }
bool ignoringPendingStylesheets() const { return m_ignorePendingStylesheets; }
unsigned maxDirectAdjacentSelectors() const { return m_maxDirectAdjacentSelectors; }
bool usesSiblingRules() const { return m_usesSiblingRules || m_usesSiblingRulesOverride; }
void setUsesSiblingRulesOverride(bool b) { m_usesSiblingRulesOverride = b; }
bool usesFirstLineRules() const { return m_usesFirstLineRules; }
bool usesFirstLetterRules() const { return m_usesFirstLetterRules; }
void setUsesFirstLetterRules(bool b) { m_usesFirstLetterRules = b; }
bool usesRemUnits() const { return m_usesRemUnits; }
void setUsesRemUnit(bool b) { m_usesRemUnits = b; }
bool hasScopedStyleSheet() { return m_documentStyleSheetCollection.scopingNodesForStyleScoped(); }
void combineCSSFeatureFlags(const RuleFeatureSet&);
void resetCSSFeatureFlags(const RuleFeatureSet&);
void didModifySeamlessParentStyleSheet() { markDocumentDirty(); }
void didRemoveShadowRoot(ShadowRoot*);
void appendActiveAuthorStyleSheets();
void getActiveAuthorStyleSheets(Vector<const Vector<RefPtr<CSSStyleSheet> >*>& activeAuthorStyleSheets) const;
StyleResolver* resolver() const
{
return m_resolver.get();
}
StyleResolver& ensureResolver()
{
if (!m_resolver) {
createResolver();
} else if (m_resolver->hasPendingAuthorStyleSheets()) {
m_resolver->appendPendingAuthorStyleSheets();
}
return *m_resolver.get();
}
bool hasResolver() const { return m_resolver.get(); }
void clearResolver();
void clearMasterResolver();
CSSFontSelector* fontSelector() { return m_fontSelector.get(); }
void resetFontSelector();
void didAttach();
void didDetach();
bool shouldClearResolver() const;
StyleResolverChange resolverChanged(RecalcStyleTime, StyleResolverUpdateMode);
unsigned resolverAccessCount() const;
void collectDocumentActiveStyleSheets(StyleSheetCollectionBase&);
void markDocumentDirty();
private:
StyleEngine(Document&);
StyleSheetCollection* ensureStyleSheetCollectionFor(TreeScope&);
StyleSheetCollection* styleSheetCollectionFor(TreeScope&);
void activeStyleSheetsUpdatedForInspector();
bool shouldUpdateShadowTreeStyleSheetCollection(StyleResolverUpdateMode);
void resolverThrowawayTimerFired(Timer<StyleEngine>*);
void markTreeScopeDirty(TreeScope&);
bool isMaster() const { return m_isMaster; }
Document* master();
typedef ListHashSet<TreeScope*, 16> TreeScopeSet;
static void insertTreeScopeInDocumentOrder(TreeScopeSet&, TreeScope*);
void clearMediaQueryRuleSetOnTreeScopeStyleSheets(TreeScopeSet treeScopes);
void createResolver();
void notifyPendingStyleSheetAdded();
void notifyPendingStyleSheetRemoved(RemovePendingSheetNotificationType);
Document& m_document;
bool m_isMaster;
// Track the number of currently loading top-level stylesheets needed for rendering.
// Sheets loaded using the @import directive are not included in this count.
// We use this count of pending sheets to detect when we can begin attaching
// elements and when it is safe to execute scripts.
int m_pendingStylesheets;
mutable Vector<RefPtr<CSSStyleSheet> > m_injectedAuthorStyleSheets;
mutable bool m_injectedStyleSheetCacheValid;
Vector<RefPtr<CSSStyleSheet> > m_authorStyleSheets;
bool m_needsUpdateActiveStylesheetsOnStyleRecalc;
DocumentStyleSheetCollection m_documentStyleSheetCollection;
HashMap<TreeScope*, OwnPtr<StyleSheetCollection> > m_styleSheetCollectionMap;
bool m_documentScopeDirty;
TreeScopeSet m_dirtyTreeScopes;
TreeScopeSet m_activeTreeScopes;
String m_preferredStylesheetSetName;
String m_selectedStylesheetSetName;
bool m_usesSiblingRules;
bool m_usesSiblingRulesOverride;
bool m_usesFirstLineRules;
bool m_usesFirstLetterRules;
bool m_usesRemUnits;
unsigned m_maxDirectAdjacentSelectors;
bool m_ignorePendingStylesheets;
bool m_didCalculateResolver;
unsigned m_lastResolverAccessCount;
Timer<StyleEngine> m_resolverThrowawayTimer;
OwnPtr<StyleResolver> m_resolver;
RefPtr<CSSFontSelector> m_fontSelector;
};
}
#endif
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