diff options
Diffstat (limited to 'WebCore/fileapi/FileWriter.cpp')
| -rw-r--r-- | WebCore/fileapi/FileWriter.cpp | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/WebCore/fileapi/FileWriter.cpp b/WebCore/fileapi/FileWriter.cpp new file mode 100644 index 0000000..7ead354 --- /dev/null +++ b/WebCore/fileapi/FileWriter.cpp @@ -0,0 +1,199 @@ +/* + * 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: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * 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. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "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 THE COPYRIGHT + * OWNER 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. + */ + +#include "config.h" + +#if ENABLE(FILE_WRITER) + +#include "FileWriter.h" + +#include "AsyncFileWriter.h" +#include "Blob.h" +#include "ExceptionCode.h" +#include "FileError.h" +#include "ProgressEvent.h" + +namespace WebCore { + +FileWriter::FileWriter(ScriptExecutionContext* context) + : ActiveDOMObject(context, this) + , m_readyState(INIT) + , m_position(0) + , m_bytesWritten(0) + , m_bytesToWrite(0) +{ +} + +void FileWriter::initialize(PassOwnPtr<AsyncFileWriter> writer, long long length) +{ + ASSERT(!m_writer); + ASSERT(length >= 0); + m_writer = writer; + m_length = length; +} + +FileWriter::~FileWriter() +{ + if (m_readyState == WRITING) + stop(); +} + +bool FileWriter::hasPendingActivity() const +{ + return m_readyState == WRITING || ActiveDOMObject::hasPendingActivity(); +} + +bool FileWriter::canSuspend() const +{ + // FIXME: It is not currently possible to suspend a FileWriter, so pages with FileWriter can not go into page cache. + return false; +} + +void FileWriter::stop() +{ + if (m_writer && m_readyState == WRITING) + m_writer->abort(); + m_readyState = DONE; +} + +void FileWriter::write(Blob* data, ExceptionCode& ec) +{ + ASSERT(m_writer); + if (m_readyState == WRITING) { + ec = INVALID_STATE_ERR; + m_error = FileError::create(ec); + return; + } + + m_readyState = WRITING; + m_bytesWritten = 0; + m_bytesToWrite = data->size(); + fireEvent(eventNames().writestartEvent); + m_writer->write(m_position, data); +} + +void FileWriter::seek(long long position, ExceptionCode& ec) +{ + ASSERT(m_writer); + if (m_readyState == WRITING) { + ec = INVALID_STATE_ERR; + m_error = FileError::create(ec); + return; + } + + m_bytesWritten = 0; + m_bytesToWrite = 0; + if (position > m_length) + position = m_length; + else if (position < 0) + position = m_length + position; + if (position < 0) + position = 0; + m_position = position; +} + +void FileWriter::truncate(long long position, ExceptionCode& ec) +{ + ASSERT(m_writer); + if (m_readyState == WRITING || position >= m_length) { + ec = INVALID_STATE_ERR; + m_error = FileError::create(ec); + return; + } + m_readyState = WRITING; + m_bytesWritten = 0; + m_bytesToWrite = 0; + fireEvent(eventNames().writestartEvent); + m_writer->truncate(position); +} + +void FileWriter::abort(ExceptionCode& ec) +{ + ASSERT(m_writer); + if (m_readyState != WRITING) { + ec = INVALID_STATE_ERR; + m_error = FileError::create(ec); + return; + } + m_error = FileError::create(ABORT_ERR); + m_readyState = DONE; + fireEvent(eventNames().errorEvent); + fireEvent(eventNames().abortEvent); + fireEvent(eventNames().writeendEvent); + m_writer->abort(); +} + +void FileWriter::didWrite(long long bytes, bool complete) +{ + ASSERT(bytes > 0); + ASSERT(bytes + m_bytesWritten > 0); + ASSERT(bytes + m_bytesWritten <= m_bytesToWrite); + m_bytesWritten += bytes; + ASSERT((m_bytesWritten == m_bytesToWrite) == complete); + m_position += bytes; + if (m_position > m_length) + m_length = m_position; + if (complete) + m_readyState = DONE; + fireEvent(eventNames().writeEvent); + if (complete) + fireEvent(eventNames().writeendEvent); +} + +void FileWriter::didTruncate(long long length) +{ + ASSERT(length > 0); + ASSERT(length >= 0); + ASSERT(length < m_length); + m_length = length; + if (m_position > m_length) + m_position = m_length; + m_readyState = DONE; + fireEvent(eventNames().writeEvent); + fireEvent(eventNames().writeendEvent); +} + +void FileWriter::didFail(ExceptionCode ec) +{ + m_error = FileError::create(ec); + m_readyState = DONE; + fireEvent(eventNames().errorEvent); + fireEvent(eventNames().writeendEvent); +} + +void FileWriter::fireEvent(const AtomicString& type) +{ + // FIXME: the current ProgressEvent uses "unsigned long" for total and loaded attributes. Need to talk with the spec writer to resolve the issue. + dispatchEvent(ProgressEvent::create(type, true, static_cast<unsigned>(m_bytesWritten), static_cast<unsigned>(m_bytesToWrite))); +} + +} // namespace WebCore + +#endif // ENABLE(FILE_WRITER) |