| /* |
| * 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 "CanvasRenderingContext.h" |
| |
| #include "CachedImage.h" |
| #include "CanvasPattern.h" |
| #include "HTMLCanvasElement.h" |
| #include "HTMLImageElement.h" |
| #include "HTMLVideoElement.h" |
| #include "KURL.h" |
| #include "SecurityOrigin.h" |
| |
| namespace WebCore { |
| |
| CanvasRenderingContext::CanvasRenderingContext(HTMLCanvasElement* canvas) |
| : m_canvas(canvas) |
| { |
| } |
| |
| void CanvasRenderingContext::ref() |
| { |
| m_canvas->ref(); |
| } |
| |
| void CanvasRenderingContext::deref() |
| { |
| m_canvas->deref(); |
| } |
| |
| void CanvasRenderingContext::checkOrigin(const CanvasPattern* pattern) |
| { |
| if (canvas()->originClean() && pattern && !pattern->originClean()) |
| canvas()->setOriginTainted(); |
| } |
| |
| void CanvasRenderingContext::checkOrigin(const HTMLCanvasElement* sourceCanvas) |
| { |
| if (canvas()->originClean() && sourceCanvas && !sourceCanvas->originClean()) |
| canvas()->setOriginTainted(); |
| } |
| |
| void CanvasRenderingContext::checkOrigin(const HTMLImageElement* image) |
| { |
| if (!image || !canvas()->originClean()) |
| return; |
| |
| CachedImage* cachedImage = image->cachedImage(); |
| checkOrigin(cachedImage->response().url()); |
| |
| if (canvas()->originClean() && !cachedImage->image()->hasSingleSecurityOrigin()) |
| canvas()->setOriginTainted(); |
| } |
| |
| void CanvasRenderingContext::checkOrigin(const HTMLVideoElement* video) |
| { |
| #if ENABLE(VIDEO) |
| checkOrigin(KURL(KURL(), video->currentSrc())); |
| if (canvas()->originClean() && video && !video->hasSingleSecurityOrigin()) |
| canvas()->setOriginTainted(); |
| #endif |
| } |
| |
| void CanvasRenderingContext::checkOrigin(const KURL& url) |
| { |
| if (!canvas()->originClean() || m_cleanOrigins.contains(url.string())) |
| return; |
| |
| if (canvas()->securityOrigin().taintsCanvas(url)) |
| canvas()->setOriginTainted(); |
| else |
| m_cleanOrigins.add(url.string()); |
| } |
| |
| } // namespace WebCore |