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/*
* Copyright (C) 2013 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 GOOGLE 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 GOOGLE 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 BackgroundHTMLParser_h
#define BackgroundHTMLParser_h
#include "core/dom/DocumentEncodingData.h"
#include "core/html/parser/BackgroundHTMLInputStream.h"
#include "core/html/parser/CompactHTMLToken.h"
#include "core/html/parser/HTMLParserOptions.h"
#include "core/html/parser/HTMLPreloadScanner.h"
#include "core/html/parser/HTMLSourceTracker.h"
#include "core/html/parser/HTMLTreeBuilderSimulator.h"
#include "core/html/parser/TextResourceDecoder.h"
#include "core/html/parser/TokenizedChunkQueue.h"
#include "core/html/parser/XSSAuditorDelegate.h"
#include "wtf/WeakPtr.h"
#include <memory>
namespace blink {
class HTMLDocumentParser;
class XSSAuditor;
class WebTaskRunner;
class BackgroundHTMLParser {
USING_FAST_MALLOC(BackgroundHTMLParser);
WTF_MAKE_NONCOPYABLE(BackgroundHTMLParser);
public:
struct Configuration {
USING_FAST_MALLOC(Configuration);
public:
Configuration();
HTMLParserOptions options;
WeakPtr<HTMLDocumentParser> parser;
std::unique_ptr<XSSAuditor> xssAuditor;
std::unique_ptr<TextResourceDecoder> decoder;
RefPtr<TokenizedChunkQueue> tokenizedChunkQueue;
// outstandingTokenLimit must be greater than or equal to
// pendingTokenLimit
size_t outstandingTokenLimit;
size_t pendingTokenLimit;
bool shouldCoalesceChunks;
};
// The returned BackgroundHTMLParser should only be used on the parser
// thread: it must first be initialized by calling init(), and free by
// calling stop().
static WeakPtr<BackgroundHTMLParser> create(std::unique_ptr<Configuration>,
RefPtr<WebTaskRunner>);
void init(const KURL& documentURL,
std::unique_ptr<CachedDocumentParameters>,
const MediaValuesCached::MediaValuesCachedData&);
struct Checkpoint {
USING_FAST_MALLOC(Checkpoint);
public:
WeakPtr<HTMLDocumentParser> parser;
std::unique_ptr<HTMLToken> token;
std::unique_ptr<HTMLTokenizer> tokenizer;
HTMLTreeBuilderSimulator::State treeBuilderState;
HTMLInputCheckpoint inputCheckpoint;
TokenPreloadScannerCheckpoint preloadScannerCheckpoint;
String unparsedInput;
};
void appendRawBytesFromMainThread(std::unique_ptr<Vector<char>>,
double bytesReceivedTime);
void setDecoder(std::unique_ptr<TextResourceDecoder>);
void flush();
void resumeFrom(std::unique_ptr<Checkpoint>);
void startedChunkWithCheckpoint(HTMLInputCheckpoint);
void finish();
void stop();
void forcePlaintextForTextDocument();
private:
BackgroundHTMLParser(std::unique_ptr<Configuration>, RefPtr<WebTaskRunner>);
~BackgroundHTMLParser();
void appendDecodedBytes(const String&);
void markEndOfFile();
void pumpTokenizer();
// Returns whether or not the HTMLDocumentParser should be notified of
// pending chunks.
bool queueChunkForMainThread();
void notifyMainThreadOfNewChunks();
void updateDocument(const String& decodedData);
template <typename FunctionType, typename... Ps>
void runOnMainThread(FunctionType, Ps&&...);
WeakPtrFactory<BackgroundHTMLParser> m_weakFactory;
BackgroundHTMLInputStream m_input;
HTMLSourceTracker m_sourceTracker;
std::unique_ptr<HTMLToken> m_token;
std::unique_ptr<HTMLTokenizer> m_tokenizer;
HTMLTreeBuilderSimulator m_treeBuilderSimulator;
HTMLParserOptions m_options;
const size_t m_outstandingTokenLimit;
WeakPtr<HTMLDocumentParser> m_parser;
std::unique_ptr<CompactHTMLTokenStream> m_pendingTokens;
const size_t m_pendingTokenLimit;
PreloadRequestStream m_pendingPreloads;
// Indices into |m_pendingTokens|.
Vector<int> m_likelyDocumentWriteScriptIndices;
ViewportDescriptionWrapper m_viewportDescription;
XSSInfoStream m_pendingXSSInfos;
std::unique_ptr<XSSAuditor> m_xssAuditor;
std::unique_ptr<TokenPreloadScanner> m_preloadScanner;
std::unique_ptr<TextResourceDecoder> m_decoder;
DocumentEncodingData m_lastSeenEncodingData;
RefPtr<WebTaskRunner> m_loadingTaskRunner;
RefPtr<TokenizedChunkQueue> m_tokenizedChunkQueue;
// Index into |m_pendingTokens| of the last <meta> csp token found. Will be
// |TokenizedChunk::noPendingToken| if none have been found.
int m_pendingCSPMetaTokenIndex;
bool m_startingScript;
double m_lastBytesReceivedTime;
bool m_shouldCoalesceChunks;
};
} // namespace blink
#endif
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