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88 lines
3.5 KiB
C++
88 lines
3.5 KiB
C++
/*
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* Copyright (C) 2013 Google, 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 GOOGLE 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 GOOGLE 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 "core/html/parser/BackgroundHTMLInputStream.h"
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namespace blink {
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BackgroundHTMLInputStream::BackgroundHTMLInputStream()
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: m_firstValidCheckpointIndex(0)
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, m_firstValidSegmentIndex(0)
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, m_totalCheckpointTokenCount(0)
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{
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}
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void BackgroundHTMLInputStream::append(const String& input)
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{
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m_current.append(SegmentedString(input));
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m_segments.append(input);
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}
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void BackgroundHTMLInputStream::close()
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{
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m_current.close();
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}
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HTMLInputCheckpoint BackgroundHTMLInputStream::createCheckpoint(size_t tokensExtractedSincePreviousCheckpoint)
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{
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HTMLInputCheckpoint checkpoint = m_checkpoints.size();
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m_checkpoints.append(Checkpoint(m_segments.size(), tokensExtractedSincePreviousCheckpoint));
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m_totalCheckpointTokenCount += tokensExtractedSincePreviousCheckpoint;
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return checkpoint;
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}
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void BackgroundHTMLInputStream::invalidateCheckpointsBefore(HTMLInputCheckpoint newFirstValidCheckpointIndex)
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{
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ASSERT(newFirstValidCheckpointIndex < m_checkpoints.size());
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// There is nothing to do for the first valid checkpoint.
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if (m_firstValidCheckpointIndex == newFirstValidCheckpointIndex)
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return;
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ASSERT(newFirstValidCheckpointIndex > m_firstValidCheckpointIndex);
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const Checkpoint& lastInvalidCheckpoint = m_checkpoints[newFirstValidCheckpointIndex - 1];
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ASSERT(m_firstValidSegmentIndex <= lastInvalidCheckpoint.numberOfSegmentsAlreadyAppended);
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for (size_t i = m_firstValidSegmentIndex; i < lastInvalidCheckpoint.numberOfSegmentsAlreadyAppended; ++i)
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m_segments[i] = String();
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m_firstValidSegmentIndex = lastInvalidCheckpoint.numberOfSegmentsAlreadyAppended;
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for (size_t i = m_firstValidCheckpointIndex; i < newFirstValidCheckpointIndex; ++i)
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m_checkpoints[i].clear();
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m_firstValidCheckpointIndex = newFirstValidCheckpointIndex;
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updateTotalCheckpointTokenCount();
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}
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void BackgroundHTMLInputStream::updateTotalCheckpointTokenCount()
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{
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m_totalCheckpointTokenCount = 0;
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size_t lastCheckpointIndex = m_checkpoints.size();
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for (size_t i = 0; i < lastCheckpointIndex; ++i)
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m_totalCheckpointTokenCount += m_checkpoints[i].tokensExtractedSincePreviousCheckpoint;
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}
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}
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