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/*
* 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 "core/css/ActiveStyleSheets.h"
#include "platform/bindings/TraceWrapperMember.h"
#include "platform/heap/Handle.h"
#include "platform/wtf/HashSet.h"
#include "platform/wtf/Vector.h"
namespace blink {
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(StyleSheetCollection*,
HeapVector<Member<StyleSheet>>*,
HeapHashSet<Member<Document>>*);
~DocumentStyleSheetCollector();
void AppendActiveStyleSheet(const ActiveStyleSheet&);
void AppendSheetForList(StyleSheet*);
bool HasVisited(Document* document) const {
return visited_documents_->Contains(document);
}
void WillVisit(Document* document) { visited_documents_->insert(document); }
private:
Member<StyleSheetCollection> collection_;
HeapVector<Member<StyleSheet>>* style_sheets_for_style_sheet_list_;
HeapHashSet<Member<Document>>* visited_documents_;
};
class ActiveDocumentStyleSheetCollector final
: public DocumentStyleSheetCollector {
public:
ActiveDocumentStyleSheetCollector(StyleSheetCollection&);
private:
HeapHashSet<Member<Document>> visited_documents_;
};
class ImportedDocumentStyleSheetCollector final
: public DocumentStyleSheetCollector {
public:
ImportedDocumentStyleSheetCollector(DocumentStyleSheetCollector&,
HeapVector<Member<StyleSheet>>&);
};
} // namespace blink
#endif // DocumentStyleSheetCollector_h