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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 "Blob.h"
#include "BlobData.h"
#include "BlobItem.h"
#include "BlobURL.h"
#include "FileSystem.h"
#include "ScriptExecutionContext.h"
#include "ThreadableBlobRegistry.h"
namespace WebCore {
// FIXME: To be removed when we switch to using BlobData.
Blob::Blob(ScriptExecutionContext* scriptExecutionContext, const String& type, const BlobItemList& items)
: m_scriptExecutionContext(scriptExecutionContext)
, m_type(type)
, m_size(0)
{
m_scriptExecutionContext->addBlob(this);
for (size_t i = 0; i < items.size(); ++i)
m_items.append(items[i]);
}
// FIXME: To be removed when we switch to using BlobData.
Blob::Blob(ScriptExecutionContext* scriptExecutionContext, const PassRefPtr<BlobItem>& item)
: m_scriptExecutionContext(scriptExecutionContext)
, m_size(0)
{
m_scriptExecutionContext->addBlob(this);
m_items.append(item);
}
// FIXME: To be removed when we switch to using BlobData.
Blob::Blob(ScriptExecutionContext* scriptExecutionContext, const String& path)
: m_scriptExecutionContext(scriptExecutionContext)
, m_size(0)
{
m_scriptExecutionContext->addBlob(this);
// Note: this doesn't initialize the type unlike File(path).
m_items.append(FileBlobItem::create(path));
}
Blob::Blob(ScriptExecutionContext* scriptExecutionContext, PassOwnPtr<BlobData> blobData, long long size)
: m_scriptExecutionContext(scriptExecutionContext)
, m_type(blobData->contentType())
, m_size(size)
{
ASSERT(blobData.get() && !blobData->items().isEmpty());
m_scriptExecutionContext->addBlob(this);
// Create a new internal URL and register it with the provided blob data.
m_url = BlobURL::createURL(scriptExecutionContext);
ThreadableBlobRegistry::registerBlobURL(scriptExecutionContext, m_url, blobData);
}
Blob::Blob(ScriptExecutionContext* scriptExecutionContext, const KURL& srcURL, const String& type, long long size)
: m_scriptExecutionContext(scriptExecutionContext)
, m_type(type)
, m_size(size)
{
m_scriptExecutionContext->addBlob(this);
// FIXME: To be removed when we switch to using BlobData.
if (srcURL.isEmpty())
return;
// Create a new internal URL and register it with the same blob data as the source URL.
m_url = BlobURL::createURL(scriptExecutionContext);
ThreadableBlobRegistry::registerBlobURL(scriptExecutionContext, m_url, srcURL);
}
Blob::~Blob()
{
// The internal URL is only used to refer to the Blob object. So we need to unregister the URL when the object is GC-ed.
if (m_scriptExecutionContext) {
m_scriptExecutionContext->removeBlob(this);
ThreadableBlobRegistry::unregisterBlobURL(m_scriptExecutionContext, m_url);
}
}
void Blob::contextDestroyed()
{
ASSERT(m_scriptExecutionContext);
// Unregister the internal URL before the context is gone.
ThreadableBlobRegistry::unregisterBlobURL(m_scriptExecutionContext, m_url);
m_scriptExecutionContext = 0;
}
unsigned long long Blob::size() const
{
// FIXME: JavaScript cannot represent sizes as large as unsigned long long, we need to
// come up with an exception to throw if file size is not represetable.
unsigned long long size = 0;
for (size_t i = 0; i < m_items.size(); ++i)
size += m_items[i]->size();
return size;
}
// FIXME: To be removed when we switch to using BlobData.
const String& Blob::path() const
{
ASSERT(m_items.size() == 1 && m_items[0]->toFileBlobItem());
return m_items[0]->toFileBlobItem()->path();
}
#if ENABLE(BLOB)
PassRefPtr<Blob> Blob::slice(ScriptExecutionContext* scriptExecutionContext, long long start, long long length, const String& contentType) const
{
if (start < 0)
start = 0;
if (length < 0)
length = 0;
// Clamp the range if it exceeds the size limit.
unsigned long long totalSize = size();
if (static_cast<unsigned long long>(start) > totalSize) {
start = 0;
length = 0;
} else if (static_cast<unsigned long long>(start + length) > totalSize)
length = totalSize - start;
size_t i = 0;
BlobItemList items;
for (; i < m_items.size() && static_cast<unsigned long long>(start) >= m_items[i]->size(); ++i)
start -= m_items[i]->size();
for (; length > 0 && i < m_items.size(); ++i) {
items.append(m_items[i]->slice(start, length));
length -= items.last()->size();
start = 0;
}
return Blob::create(scriptExecutionContext, contentType, items);
}
#endif // ENABLE(BLOB)
} // namespace WebCore
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