/*
* Copyright (C) 2014 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef DocumentStyleSheetCollector_h
#define DocumentStyleSheetCollector_h
#include "heap/Handle.h"
#include "wtf/HashSet.h"
#include "wtf/RefPtr.h"
#include "wtf/Vector.h"
namespace WebCore {
class CSSStyleSheet;
class Document;
class StyleSheet;
class StyleSheetCollection;
class DocumentStyleSheetCollector {
// This class contains references to two on-heap collections, therefore
// it's unhealthy to have it anywhere but on the stack, where stack
// scanning will keep them alive.
STACK_ALLOCATED();
public:
friend class ImportedDocumentStyleSheetCollector;
DocumentStyleSheetCollector(WillBeHeapVector<RefPtrWillBeMember<StyleSheet> >& sheetsForList, WillBeHeapVector<RefPtrWillBeMember<CSSStyleSheet> >& activeList, HashSet<Document*>&);
~DocumentStyleSheetCollector();
void appendActiveStyleSheets(const WillBeHeapVector<RefPtrWillBeMember<CSSStyleSheet> >&);
void appendActiveStyleSheet(CSSStyleSheet*);
void appendSheetForList(StyleSheet*);
bool hasVisited(Document* document) const { return m_visitedDocuments.contains(document); }
void willVisit(Document* document) { m_visitedDocuments.add(document); }
private:
WillBeHeapVector<RefPtrWillBeMember<StyleSheet> >& m_styleSheetsForStyleSheetList;
WillBeHeapVector<RefPtrWillBeMember<CSSStyleSheet> >& m_activeAuthorStyleSheets;
HashSet<Document*>& m_visitedDocuments;
};
class ActiveDocumentStyleSheetCollector FINAL : public DocumentStyleSheetCollector {
public:
ActiveDocumentStyleSheetCollector(StyleSheetCollection&);
private:
HashSet<Document*> m_visitedDocuments;
};
class ImportedDocumentStyleSheetCollector FINAL : public DocumentStyleSheetCollector {
public:
ImportedDocumentStyleSheetCollector(DocumentStyleSheetCollector&, WillBeHeapVector<RefPtrWillBeMember<StyleSheet> >&);
};
} // namespace WebCore
#endif // DocumentStyleSheetCollector_h