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/*
* Copyright (C) 2009 Apple 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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 "core/html/canvas/CanvasRenderingContext.h"
#include "core/html/canvas/CanvasImageSource.h"
#include "platform/weborigin/SecurityOrigin.h"
namespace WebCore {
CanvasRenderingContext::CanvasRenderingContext(HTMLCanvasElement* canvas)
: m_canvas(canvas)
{
}
bool CanvasRenderingContext::wouldTaintOrigin(CanvasImageSource* imageSource)
{
const KURL& sourceURL = imageSource->sourceURL();
bool hasURL = (sourceURL.isValid() && !sourceURL.isAboutBlankURL());
if (hasURL) {
if (sourceURL.protocolIsData() || m_cleanURLs.contains(sourceURL.string()))
return false;
if (m_dirtyURLs.contains(sourceURL.string()))
return true;
}
bool taintOrigin = imageSource->wouldTaintOrigin(canvas()->securityOrigin());
if (hasURL) {
if (taintOrigin)
m_dirtyURLs.add(sourceURL.string());
else
m_cleanURLs.add(sourceURL.string());
}
return taintOrigin;
}
} // namespace WebCore
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