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/*
* 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"
#include "BlobBuilder.h"
#include "Blob.h"
#include "ExceptionCode.h"
#include "File.h"
#include "LineEnding.h"
#include "TextEncoding.h"
#include <wtf/text/AtomicString.h>
namespace WebCore {
BlobBuilder::BlobBuilder()
: m_size(0)
{
}
bool BlobBuilder::append(const String& text, const String& endingType, ExceptionCode& ec)
{
bool isEndingTypeTransparent = endingType == "transparent";
bool isEndingTypeNative = endingType == "native";
if (!endingType.isEmpty() && !isEndingTypeTransparent && !isEndingTypeNative) {
ec = SYNTAX_ERR;
return 0;
}
CString utf8Text = UTF8Encoding().encode(text.characters(), text.length(), EntitiesForUnencodables);
// If the last item is not a data item, create one. Otherwise, we simply append the new string to the last data item.
if (m_items.isEmpty() || m_items[m_items.size() - 1].type != BlobDataItem::Data)
m_items.append(BlobDataItem(RawData::create()));
if (!utf8Text.isNull()) {
Vector<char>& buffer = *m_items[m_items.size() - 1].data->mutableData();
size_t oldSize = buffer.size();
if (isEndingTypeNative)
normalizeLineEndingsToNative(utf8Text, buffer);
else
buffer.append(utf8Text.data(), utf8Text.length());
m_size += buffer.size() - oldSize;
}
return true;
}
bool BlobBuilder::append(const String& text, ExceptionCode& ec)
{
return append(text, String(), ec);
}
bool BlobBuilder::append(PassRefPtr<Blob> blob)
{
if (blob->isFile()) {
// If the blob is file that is not snapshoted, capture the snapshot now.
// FIXME: This involves synchronous file operation. We need to figure out how to make it asynchronous.
File* file = static_cast<File*>(blob.get());
long long snapshotSize;
double snapshotModificationTime;
file->captureSnapshot(snapshotSize, snapshotModificationTime);
m_size += snapshotSize;
m_items.append(BlobDataItem(file->path(), 0, snapshotSize, snapshotModificationTime));
} else {
long long blobSize = static_cast<long long>(blob->size());
m_size += blobSize;
m_items.append(BlobDataItem(blob->url(), 0, blobSize));
}
return true;
}
PassRefPtr<Blob> BlobBuilder::getBlob(const String& contentType)
{
OwnPtr<BlobData> blobData = BlobData::create();
blobData->setContentType(contentType);
blobData->swapItems(m_items);
RefPtr<Blob> blob = Blob::create(blobData.release(), m_size);
// After creating a blob from the current blob data, we do not need to keep the data around any more. Instead, we only
// need to keep a reference to the URL of the blob just created.
m_items.append(BlobDataItem(blob->url(), 0, m_size));
return blob;
}
} // namespace WebCore
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