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/*
* Copyright (C) 2010 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 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 APPLE 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.
*/
#ifndef DrawingArea_h
#define DrawingArea_h
#include "DrawingAreaInfo.h"
#include "LayerTreeContext.h"
#include "MessageReceiver.h"
#include <WebCore/FloatRect.h>
#include <WebCore/IntRect.h>
#include <WebCore/LayerFlushThrottleState.h>
#include <WebCore/PlatformScreen.h>
#include <WebCore/ViewState.h>
#include <functional>
#include <wtf/Forward.h>
#include <wtf/Noncopyable.h>
namespace IPC {
class Connection;
class MessageDecoder;
}
namespace WebCore {
class DisplayRefreshMonitor;
class FrameView;
class GraphicsLayer;
class GraphicsLayerFactory;
}
namespace WebKit {
struct ColorSpaceData;
class LayerTreeHost;
class WebPage;
struct WebPageCreationParameters;
struct WebPreferencesStore;
class DrawingArea : public IPC::MessageReceiver {
WTF_MAKE_NONCOPYABLE(DrawingArea);
public:
static std::unique_ptr<DrawingArea> create(WebPage&, const WebPageCreationParameters&);
virtual ~DrawingArea();
DrawingAreaType type() const { return m_type; }
virtual void setNeedsDisplay() = 0;
virtual void setNeedsDisplayInRect(const WebCore::IntRect&) = 0;
virtual void scroll(const WebCore::IntRect& scrollRect, const WebCore::IntSize& scrollDelta) = 0;
// FIXME: These should be pure virtual.
virtual void pageBackgroundTransparencyChanged() { }
virtual void forceRepaint() { }
virtual bool forceRepaintAsync(uint64_t /*callbackID*/) { return false; }
virtual void setLayerTreeStateIsFrozen(bool) { }
virtual bool layerTreeStateIsFrozen() const { return false; }
virtual LayerTreeHost* layerTreeHost() const { return 0; }
virtual void setPaintingEnabled(bool) { }
virtual void updatePreferences(const WebPreferencesStore&) { }
virtual void mainFrameContentSizeChanged(const WebCore::IntSize&) { }
#if PLATFORM(COCOA)
virtual void setExposedRect(const WebCore::FloatRect&) = 0;
virtual WebCore::FloatRect exposedRect() const = 0;
virtual void acceleratedAnimationDidStart(uint64_t /*layerID*/, const String& /*key*/, double /*startTime*/) { }
virtual void acceleratedAnimationDidEnd(uint64_t /*layerID*/, const String& /*key*/) { }
#endif
#if PLATFORM(IOS)
virtual void setExposedContentRect(const WebCore::FloatRect&) = 0;
#endif
virtual void mainFrameScrollabilityChanged(bool) { }
virtual bool supportsAsyncScrolling() { return false; }
virtual bool shouldUseTiledBackingForFrameView(const WebCore::FrameView*) { return false; }
virtual WebCore::GraphicsLayerFactory* graphicsLayerFactory() { return nullptr; }
virtual void setRootCompositingLayer(WebCore::GraphicsLayer*) = 0;
virtual void scheduleCompositingLayerFlush() = 0;
virtual void scheduleCompositingLayerFlushImmediately() = 0;
#if USE(REQUEST_ANIMATION_FRAME_DISPLAY_MONITOR)
virtual PassRefPtr<WebCore::DisplayRefreshMonitor> createDisplayRefreshMonitor(PlatformDisplayID);
#endif
#if USE(COORDINATED_GRAPHICS)
virtual void didReceiveCoordinatedLayerTreeHostMessage(IPC::Connection*, IPC::MessageDecoder&) = 0;
#endif
virtual void dispatchAfterEnsuringUpdatedScrollPosition(std::function<void ()>);
virtual void viewStateDidChange(WebCore::ViewState::Flags, bool /*wantsDidUpdateViewState*/) { }
virtual void setLayerHostingMode(LayerHostingMode) { }
virtual bool markLayersVolatileImmediatelyIfPossible() { return true; }
virtual bool adjustLayerFlushThrottling(WebCore::LayerFlushThrottleState::Flags) { return false; }
protected:
DrawingArea(DrawingAreaType, WebPage&);
DrawingAreaType m_type;
WebPage& m_webPage;
private:
// IPC::MessageReceiver.
virtual void didReceiveMessage(IPC::Connection*, IPC::MessageDecoder&) override;
// Message handlers.
// FIXME: These should be pure virtual.
virtual void updateBackingStoreState(uint64_t /*backingStoreStateID*/, bool /*respondImmediately*/, float /*deviceScaleFactor*/, const WebCore::IntSize& /*size*/,
const WebCore::IntSize& /*scrollOffset*/) { }
virtual void didUpdate() { }
#if PLATFORM(COCOA)
// Used by TiledCoreAnimationDrawingArea.
virtual void updateGeometry(const WebCore::IntSize& viewSize, const WebCore::IntSize& layerPosition) { }
virtual void setDeviceScaleFactor(float) { }
virtual void setColorSpace(const ColorSpaceData&) { }
virtual void adjustTransientZoom(double scale, WebCore::FloatPoint origin) { }
virtual void commitTransientZoom(double scale, WebCore::FloatPoint origin) { }
virtual void addTransactionCallbackID(uint64_t callbackID) { ASSERT_NOT_REACHED(); }
#endif
};
#define DRAWING_AREA_TYPE_CASTS(ToValueTypeName, predicate) \
TYPE_CASTS_BASE(ToValueTypeName, DrawingArea, value, value->predicate, value.predicate)
} // namespace WebKit
#endif // DrawingArea_h
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