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/*
* Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
* Copyright (C) 2008 Google Inc.
*
* 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 "Document.h"
#include "FloatRect.h"
#include "ImageBuffer.h"
#include "RenderView.h"
#include "Settings.h"
namespace WebCore {
namespace {
struct ScopedState {
ScopedState(Frame* theFrame, RenderObject* theRenderer)
: frame(theFrame)
, renderer(theRenderer)
, paintBehavior(frame->view()->paintBehavior())
, backgroundColor(frame->view()->baseBackgroundColor())
{
}
~ScopedState()
{
if (renderer)
renderer->updateDragState(false);
frame->view()->setPaintBehavior(paintBehavior);
frame->view()->setBaseBackgroundColor(backgroundColor);
frame->view()->setNodeToDraw(0);
}
Frame* frame;
RenderObject* renderer;
PaintBehavior paintBehavior;
Color backgroundColor;
};
} // namespace
DragImageRef Frame::nodeImage(Node* node)
{
RenderObject* renderer = node->renderer();
if (!renderer)
return 0;
const ScopedState state(this, renderer);
renderer->updateDragState(true);
m_view->setPaintBehavior(state.paintBehavior | PaintBehaviorFlattenCompositingLayers);
// When generating the drag image for an element, ignore the document background.
m_view->setBaseBackgroundColor(colorWithOverrideAlpha(Color::white, 1.0));
m_doc->updateLayout();
m_view->setNodeToDraw(node); // Enable special sub-tree drawing mode.
IntRect topLevelRect;
IntRect paintingRect = renderer->paintingRootRect(topLevelRect);
OwnPtr<ImageBuffer> buffer(ImageBuffer::create(paintingRect.size()));
if (!buffer)
return 0;
buffer->context()->translate(-paintingRect.x(), -paintingRect.y());
buffer->context()->clip(FloatRect(0, 0, paintingRect.right(), paintingRect.bottom()));
m_view->paint(buffer->context(), paintingRect);
RefPtr<Image> image = buffer->copyImage();
return createDragImageFromImage(image.get());
}
DragImageRef Frame::dragImageForSelection()
{
if (!selection()->isRange())
return 0;
const ScopedState state(this, 0);
m_view->setPaintBehavior(PaintBehaviorSelectionOnly);
m_doc->updateLayout();
IntRect paintingRect = enclosingIntRect(selectionBounds());
OwnPtr<ImageBuffer> buffer(ImageBuffer::create(paintingRect.size()));
if (!buffer)
return 0;
buffer->context()->translate(-paintingRect.x(), -paintingRect.y());
buffer->context()->clip(FloatRect(0, 0, paintingRect.right(), paintingRect.bottom()));
m_view->paint(buffer->context(), paintingRect);
RefPtr<Image> image = buffer->copyImage();
return createDragImageFromImage(image.get());
}
} // namespace WebCore
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