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/*
* Copyright (C) 2010 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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 HTMLDocumentParser_h
#define HTMLDocumentParser_h
#include "CachedResourceClient.h"
#include "FragmentScriptingPermission.h"
#include "HTMLInputStream.h"
#include "HTMLParserOptions.h"
#include "HTMLPreloadScanner.h"
#include "HTMLScriptRunnerHost.h"
#include "HTMLSourceTracker.h"
#include "HTMLToken.h"
#include "HTMLTokenizer.h"
#include "ScriptableDocumentParser.h"
#include "SegmentedString.h"
#include "XSSAuditor.h"
#include "XSSAuditorDelegate.h"
#include <wtf/Deque.h>
#include <wtf/WeakPtr.h>
#include <wtf/text/TextPosition.h>
namespace WebCore {
class BackgroundHTMLParser;
class CompactHTMLToken;
class Document;
class DocumentFragment;
class HTMLDocument;
class HTMLParserScheduler;
class HTMLScriptRunner;
class HTMLTreeBuilder;
class HTMLResourcePreloader;
class ScriptController;
class ScriptSourceCode;
class PumpSession;
class HTMLDocumentParser : public ScriptableDocumentParser, HTMLScriptRunnerHost, CachedResourceClient {
WTF_MAKE_FAST_ALLOCATED;
public:
static PassRefPtr<HTMLDocumentParser> create(HTMLDocument& document)
{
return adoptRef(new HTMLDocumentParser(document));
}
virtual ~HTMLDocumentParser();
// Exposed for HTMLParserScheduler
void resumeParsingAfterYield();
static void parseDocumentFragment(const String&, DocumentFragment&, Element* contextElement, ParserContentPolicy = AllowScriptingContent);
HTMLTokenizer* tokenizer() const { return m_tokenizer.get(); }
virtual TextPosition textPosition() const override;
virtual void suspendScheduledTasks() override;
virtual void resumeScheduledTasks() override;
protected:
virtual void insert(const SegmentedString&) override;
virtual void append(PassRefPtr<StringImpl>) override;
virtual void finish() override;
explicit HTMLDocumentParser(HTMLDocument&);
HTMLDocumentParser(DocumentFragment&, Element* contextElement, ParserContentPolicy);
HTMLTreeBuilder* treeBuilder() const { return m_treeBuilder.get(); }
void forcePlaintextForTextDocument();
private:
static PassRefPtr<HTMLDocumentParser> create(DocumentFragment& fragment, Element* contextElement, ParserContentPolicy parserContentPolicy)
{
return adoptRef(new HTMLDocumentParser(fragment, contextElement, parserContentPolicy));
}
// DocumentParser
virtual void detach() override;
virtual bool hasInsertionPoint() override;
virtual bool processingData() const override;
virtual void prepareToStopParsing() override;
virtual void stopParsing() override;
virtual bool isWaitingForScripts() const override;
virtual bool isExecutingScript() const override;
virtual void executeScriptsWaitingForStylesheets() override;
// HTMLScriptRunnerHost
virtual void watchForLoad(CachedResource*) override;
virtual void stopWatchingForLoad(CachedResource*) override;
virtual HTMLInputStream& inputStream() override { return m_input; }
virtual bool hasPreloadScanner() const override { return m_preloadScanner.get(); }
virtual void appendCurrentInputStreamToPreloadScannerAndScan() override;
// CachedResourceClient
virtual void notifyFinished(CachedResource*) override;
Document* contextForParsingSession();
enum SynchronousMode {
AllowYield,
ForceSynchronous,
};
bool canTakeNextToken(SynchronousMode, PumpSession&);
void pumpTokenizer(SynchronousMode);
void pumpTokenizerIfPossible(SynchronousMode);
void constructTreeFromHTMLToken(HTMLToken&);
void runScriptsForPausedTreeBuilder();
void resumeParsingAfterScriptExecution();
void attemptToEnd();
void endIfDelayed();
void attemptToRunDeferredScriptsAndEnd();
void end();
bool isParsingFragment() const;
bool isScheduledForResume() const;
bool inPumpSession() const { return m_pumpSessionNestingLevel > 0; }
bool shouldDelayEnd() const { return inPumpSession() || isWaitingForScripts() || isScheduledForResume() || isExecutingScript(); }
HTMLToken& token() { return *m_token.get(); }
HTMLParserOptions m_options;
HTMLInputStream m_input;
std::unique_ptr<HTMLToken> m_token;
std::unique_ptr<HTMLTokenizer> m_tokenizer;
std::unique_ptr<HTMLScriptRunner> m_scriptRunner;
std::unique_ptr<HTMLTreeBuilder> m_treeBuilder;
std::unique_ptr<HTMLPreloadScanner> m_preloadScanner;
std::unique_ptr<HTMLPreloadScanner> m_insertionPreloadScanner;
std::unique_ptr<HTMLParserScheduler> m_parserScheduler;
HTMLSourceTracker m_sourceTracker;
TextPosition m_textPosition;
XSSAuditor m_xssAuditor;
XSSAuditorDelegate m_xssAuditorDelegate;
std::unique_ptr<HTMLResourcePreloader> m_preloader;
bool m_endWasDelayed;
bool m_haveBackgroundParser;
unsigned m_pumpSessionNestingLevel;
};
}
#endif
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