96 lines
3.3 KiB
C++
96 lines
3.3 KiB
C++
/*
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* Copyright (C) 2010 Adam Barth. All Rights Reserved.
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* Copyright (C) 2015 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "HTMLSourceTracker.h"
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#include "HTMLTokenizer.h"
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#include <wtf/text/StringBuilder.h>
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namespace WebCore {
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void HTMLSourceTracker::startToken(SegmentedString& currentInput, HTMLTokenizer& tokenizer)
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{
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if (!m_started) {
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if (tokenizer.numberOfBufferedCharacters())
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m_previousSource = tokenizer.bufferedCharacters();
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else
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m_previousSource.clear();
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m_started = true;
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} else
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m_previousSource.append(m_currentSource);
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m_currentSource = currentInput;
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m_tokenStart = m_currentSource.numberOfCharactersConsumed() - m_previousSource.length();
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tokenizer.setTokenAttributeBaseOffset(m_tokenStart);
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}
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void HTMLSourceTracker::endToken(SegmentedString& currentInput, HTMLTokenizer& tokenizer)
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{
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ASSERT(m_started);
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m_started = false;
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m_tokenEnd = currentInput.numberOfCharactersConsumed() - tokenizer.numberOfBufferedCharacters();
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m_cachedSourceForToken = String();
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}
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String HTMLSourceTracker::source(const HTMLToken& token)
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{
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ASSERT(!m_started);
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if (token.type() == HTMLToken::EndOfFile)
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return String(); // Hides the null character we use to mark the end of file.
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if (!m_cachedSourceForToken.isEmpty())
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return m_cachedSourceForToken;
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unsigned length = m_tokenEnd - m_tokenStart;
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StringBuilder source;
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source.reserveCapacity(length);
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unsigned i = 0;
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for ( ; i < length && !m_previousSource.isEmpty(); ++i) {
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source.append(m_previousSource.currentCharacter());
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m_previousSource.advance();
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}
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for ( ; i < length; ++i) {
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ASSERT(!m_currentSource.isEmpty());
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source.append(m_currentSource.currentCharacter());
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m_currentSource.advance();
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}
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m_cachedSourceForToken = source.toString();
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return m_cachedSourceForToken;
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}
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String HTMLSourceTracker::source(const HTMLToken& token, unsigned attributeStart, unsigned attributeEnd)
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{
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return source(token).substring(attributeStart, attributeEnd - attributeStart);
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}
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}
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