BackgroundHTMLInputStream.cpp [plain text]
#include "config.h"
#if ENABLE(THREADED_HTML_PARSER)
#include "BackgroundHTMLInputStream.h"
namespace WebCore {
BackgroundHTMLInputStream::BackgroundHTMLInputStream()
: m_firstValidCheckpointIndex(0)
, m_firstValidSegmentIndex(0)
{
}
void BackgroundHTMLInputStream::append(const String& input)
{
m_current.append(SegmentedString(input));
m_segments.append(input);
}
void BackgroundHTMLInputStream::close()
{
m_current.close();
}
HTMLInputCheckpoint BackgroundHTMLInputStream::createCheckpoint()
{
HTMLInputCheckpoint checkpoint = m_checkpoints.size();
m_checkpoints.append(Checkpoint(m_current, m_segments.size()));
return checkpoint;
}
void BackgroundHTMLInputStream::invalidateCheckpointsBefore(HTMLInputCheckpoint newFirstValidCheckpointIndex)
{
ASSERT(newFirstValidCheckpointIndex < m_checkpoints.size());
if (m_firstValidCheckpointIndex == newFirstValidCheckpointIndex)
return;
ASSERT(newFirstValidCheckpointIndex > m_firstValidCheckpointIndex);
const Checkpoint& lastInvalidCheckpoint = m_checkpoints[newFirstValidCheckpointIndex - 1];
ASSERT(m_firstValidSegmentIndex <= lastInvalidCheckpoint.numberOfSegmentsAlreadyAppended);
for (size_t i = m_firstValidSegmentIndex; i < lastInvalidCheckpoint.numberOfSegmentsAlreadyAppended; ++i)
m_segments[i] = String();
m_firstValidSegmentIndex = lastInvalidCheckpoint.numberOfSegmentsAlreadyAppended;
for (size_t i = m_firstValidCheckpointIndex; i < newFirstValidCheckpointIndex; ++i)
m_checkpoints[i].clear();
m_firstValidCheckpointIndex = newFirstValidCheckpointIndex;
}
void BackgroundHTMLInputStream::rewindTo(HTMLInputCheckpoint checkpointIndex, const String& unparsedInput)
{
ASSERT(checkpointIndex < m_checkpoints.size()); const Checkpoint& checkpoint = m_checkpoints[checkpointIndex];
ASSERT(!checkpoint.isNull());
bool isClosed = m_current.isClosed();
m_current = checkpoint.input;
for (size_t i = checkpoint.numberOfSegmentsAlreadyAppended; i < m_segments.size(); ++i) {
ASSERT(!m_segments[i].isNull());
m_current.append(SegmentedString(m_segments[i]));
}
if (!unparsedInput.isEmpty())
m_current.prepend(SegmentedString(unparsedInput));
if (isClosed && !m_current.isClosed())
m_current.close();
ASSERT(m_current.isClosed() == isClosed);
m_segments.clear();
m_checkpoints.clear();
m_firstValidCheckpointIndex = 0;
m_firstValidSegmentIndex = 0;
}
}
#endif // ENABLE(THREADED_HTML_PARSER)