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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 {
static CString convertToCString(const String& text, const String& endingType, ExceptionCode& ec)
{
DEFINE_STATIC_LOCAL(AtomicString, transparent, ("transparent"));
DEFINE_STATIC_LOCAL(AtomicString, native, ("native"));
ec = 0;
if (endingType.isEmpty() || endingType == transparent)
return UTF8Encoding().encode(text.characters(), text.length(), EntitiesForUnencodables);
if (endingType == native)
return normalizeLineEndingsToNative(UTF8Encoding().encode(text.characters(), text.length(), EntitiesForUnencodables));
ec = SYNTAX_ERR;
return CString();
}
static CString concatenateTwoCStrings(const CString& a, const CString& b)
{
if (a.isNull() && b.isNull())
return CString();
char* q;
CString result = CString::newUninitialized(a.length() + b.length(), q);
if (a.length())
memcpy(q, a.data(), a.length());
if (b.length())
memcpy(q + a.length(), b.data(), b.length());
return result;
}
BlobBuilder::BlobBuilder()
: m_size(0)
{
}
bool BlobBuilder::append(const String& text, const String& endingType, ExceptionCode& ec)
{
CString cstr = convertToCString(text, endingType, ec);
if (ec)
return false;
m_size += cstr.length();
// If the last item is a string, concatenate it with current string.
if (!m_items.isEmpty() && m_items[m_items.size() - 1].type == BlobDataItem::Data)
m_items[m_items.size() - 1].data = concatenateTwoCStrings(m_items[m_items.size() - 1].data, cstr);
else
m_items.append(BlobDataItem(cstr));
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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