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/*
* Copyright (C) 2011 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:
*
* 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 GOOGLE INC. AND ITS 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 GOOGLE INC.
* OR ITS 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 "PageOverlay.h"
#include "WebPageOverlay.h"
#include "WebViewClient.h"
#include "WebViewImpl.h"
#include "core/page/Page.h"
#include "core/page/Settings.h"
#include "core/platform/graphics/GraphicsLayer.h"
#include "core/platform/graphics/GraphicsLayerClient.h"
#include "public/platform/WebLayer.h"
using namespace WebCore;
namespace WebKit {
namespace {
WebCanvas* ToWebCanvas(GraphicsContext* gc)
{
return gc->canvas();
}
} // namespace
PassOwnPtr<PageOverlay> PageOverlay::create(WebViewImpl* viewImpl, WebPageOverlay* overlay)
{
return adoptPtr(new PageOverlay(viewImpl, overlay));
}
PageOverlay::PageOverlay(WebViewImpl* viewImpl, WebPageOverlay* overlay)
: m_viewImpl(viewImpl)
, m_overlay(overlay)
, m_zOrder(0)
{
}
class OverlayGraphicsLayerClientImpl : public WebCore::GraphicsLayerClient {
public:
static PassOwnPtr<OverlayGraphicsLayerClientImpl*> create(WebPageOverlay* overlay)
{
return adoptPtr(new OverlayGraphicsLayerClientImpl(overlay));
}
virtual ~OverlayGraphicsLayerClientImpl() { }
virtual void notifyAnimationStarted(const GraphicsLayer*, double time) { }
virtual void paintContents(const GraphicsLayer*, GraphicsContext& gc, GraphicsLayerPaintingPhase, const IntRect& inClip)
{
gc.save();
m_overlay->paintPageOverlay(ToWebCanvas(&gc));
gc.restore();
}
private:
explicit OverlayGraphicsLayerClientImpl(WebPageOverlay* overlay)
: m_overlay(overlay)
{
}
WebPageOverlay* m_overlay;
};
void PageOverlay::clear()
{
invalidateWebFrame();
if (m_layer) {
m_layer->removeFromParent();
m_layer = nullptr;
m_layerClient = nullptr;
}
}
void PageOverlay::update()
{
invalidateWebFrame();
if (!m_layer) {
m_layerClient = OverlayGraphicsLayerClientImpl::create(m_overlay);
m_layer = GraphicsLayer::create(m_viewImpl->graphicsLayerFactory(), m_layerClient.get());
m_layer->setName("WebViewImpl page overlay content");
m_layer->setDrawsContent(true);
// Compositor hit-testing does not know how to deal with layers that may be
// transparent to events (see http://crbug.com/269598). So require
// scrolling and touches on this layer to go to the main thread.
WebLayer* platformLayer = m_layer->platformLayer();
platformLayer->setShouldScrollOnMainThread(true);
WebVector<WebRect> webRects(static_cast<size_t>(1));
webRects[0] = WebRect(0, 0, INT_MAX, INT_MAX);
platformLayer->setTouchEventHandlerRegion(webRects);
}
FloatSize size(m_viewImpl->size());
if (size != m_layer->size()) {
// Triggers re-adding to root layer to ensure that we are on top of
// scrollbars.
m_layer->removeFromParent();
m_layer->setSize(size);
}
m_viewImpl->setOverlayLayer(m_layer.get());
m_layer->setNeedsDisplay();
}
void PageOverlay::paintWebFrame(GraphicsContext& gc)
{
if (!m_viewImpl->isAcceleratedCompositingActive()) {
gc.save();
m_overlay->paintPageOverlay(ToWebCanvas(&gc));
gc.restore();
}
}
void PageOverlay::invalidateWebFrame()
{
// WebPageOverlay does the actual painting of the overlay.
// Here we just make sure to invalidate.
if (!m_viewImpl->isAcceleratedCompositingActive()) {
// FIXME: able to invalidate a smaller rect.
// FIXME: Is it important to just invalidate a smaller rect given that
// this is not on a critical codepath? In order to do so, we'd
// have to take scrolling into account.
const WebSize& size = m_viewImpl->size();
WebRect damagedRect(0, 0, size.width, size.height);
if (m_viewImpl->client())
m_viewImpl->client()->didInvalidateRect(damagedRect);
}
}
} // namespace WebKit
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