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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 "web/PageOverlay.h"
#include "core/frame/FrameHost.h"
#include "core/frame/Settings.h"
#include "core/page/Page.h"
#include "core/page/scrolling/ScrollingCoordinator.h"
#include "platform/graphics/GraphicsContext.h"
#include "platform/graphics/GraphicsLayer.h"
#include "platform/graphics/GraphicsLayerClient.h"
#include "platform/scroll/MainThreadScrollingReason.h"
#include "public/platform/WebLayer.h"
#include "public/web/WebViewClient.h"
#include "web/WebDevToolsAgentImpl.h"
#include "web/WebViewImpl.h"
namespace blink {
PassOwnPtr<PageOverlay> PageOverlay::create(WebViewImpl* viewImpl, PageOverlay::Delegate* delegate)
{
return adoptPtr(new PageOverlay(viewImpl, delegate));
}
PageOverlay::PageOverlay(WebViewImpl* viewImpl, PageOverlay::Delegate* delegate)
: m_viewImpl(viewImpl)
, m_delegate(delegate)
{
}
PageOverlay::~PageOverlay()
{
if (!m_layer)
return;
m_layer->removeFromParent();
if (WebDevToolsAgentImpl* devTools = m_viewImpl->mainFrameDevToolsAgentImpl())
devTools->didRemovePageOverlay(m_layer.get());
m_layer = nullptr;
}
void PageOverlay::update()
{
if (!m_viewImpl->isAcceleratedCompositingActive())
return;
Page* page = m_viewImpl->page();
if (!page)
return;
if (!page->mainFrame()->isLocalFrame())
return;
if (!m_layer) {
m_layer = GraphicsLayer::create(this);
m_layer->setDrawsContent(true);
if (WebDevToolsAgentImpl* devTools = m_viewImpl->mainFrameDevToolsAgentImpl())
devTools->willAddPageOverlay(m_layer.get());
// This is required for contents of overlay to stay in sync with the page while scrolling.
WebLayer* platformLayer = m_layer->platformLayer();
platformLayer->addMainThreadScrollingReasons(MainThreadScrollingReason::kPageOverlay);
page->frameHost().visualViewport().containerLayer()->addChild(m_layer.get());
}
FloatSize size(page->frameHost().visualViewport().size());
if (size != m_layer->size())
m_layer->setSize(size);
m_layer->setNeedsDisplay();
}
LayoutRect PageOverlay::visualRect() const
{
ASSERT(m_layer.get());
return LayoutRect(FloatPoint(), m_layer->size());
}
IntRect PageOverlay::computeInterestRect(const GraphicsLayer* graphicsLayer, const IntRect&) const
{
return IntRect(IntPoint(), expandedIntSize(m_layer->size()));
}
void PageOverlay::paintContents(const GraphicsLayer* graphicsLayer, GraphicsContext& gc, GraphicsLayerPaintingPhase phase, const IntRect& interestRect) const
{
ASSERT(m_layer);
m_delegate->paintPageOverlay(*this, gc, interestRect.size());
}
String PageOverlay::debugName(const GraphicsLayer*) const
{
return "WebViewImpl Page Overlay Content Layer";
}
} // namespace blink
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