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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 "BlobItem.h"
#include "FileSystem.h"
namespace WebCore {
Blob::Blob(ScriptExecutionContext*, const String& type, const BlobItemList& items)
: m_type(type)
{
for (size_t i = 0; i < items.size(); ++i)
m_items.append(items[i]);
}
Blob::Blob(ScriptExecutionContext*, const PassRefPtr<BlobItem>& item)
{
m_items.append(item);
}
Blob::Blob(ScriptExecutionContext*, const String& path)
{
// Note: this doesn't initialize the type unlike File(path).
m_items.append(FileBlobItem::create(path));
}
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;
}
const String& Blob::path() const
{
ASSERT(m_items.size() == 1 && m_items[0]->toFileBlobItem());
return m_items[0]->toFileBlobItem()->path();
}
#if ENABLE(BLOB_SLICE)
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_SLICE)
} // namespace WebCore
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