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/*
* Copyright (C) 2010-2020 Apple Inc. All rights reserved.
* Portions Copyright (c) 2010 Motorola Mobility, 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.
*/
#pragma once
#include "DrawingAreaInfo.h"
#include "GenericCallback.h"
#include "MessageReceiver.h"
#include "MessageSender.h"
#include <WebCore/FloatRect.h>
#include <WebCore/IntRect.h>
#include <WebCore/IntSize.h>
#include <stdint.h>
#include <wtf/Noncopyable.h>
#include <wtf/RunLoop.h>
#include <wtf/TypeCasts.h>
#if PLATFORM(COCOA)
namespace WTF {
class MachSendRight;
}
#endif
namespace WebKit {
class LayerTreeContext;
class WebPageProxy;
class WebProcessProxy;
#if USE(COORDINATED_GRAPHICS) || USE(TEXTURE_MAPPER)
class UpdateInfo;
#endif
class DrawingAreaProxy : public IPC::MessageReceiver, protected IPC::MessageSender {
WTF_MAKE_FAST_ALLOCATED;
WTF_MAKE_NONCOPYABLE(DrawingAreaProxy);
public:
virtual ~DrawingAreaProxy();
DrawingAreaType type() const { return m_type; }
DrawingAreaIdentifier identifier() const { return m_identifier; }
void startReceivingMessages();
virtual void deviceScaleFactorDidChange() = 0;
// FIXME: These should be pure virtual.
virtual void setBackingStoreIsDiscardable(bool) { }
virtual void waitForBackingStoreUpdateOnNextPaint() { }
const WebCore::IntSize& size() const { return m_size; }
bool setSize(const WebCore::IntSize&, const WebCore::IntSize& scrollOffset = { });
#if USE(COORDINATED_GRAPHICS) || USE(TEXTURE_MAPPER)
// The timeout we use when waiting for a DidUpdateGeometry message.
static constexpr Seconds didUpdateBackingStoreStateTimeout() { return Seconds::fromMilliseconds(500); }
virtual void targetRefreshRateDidChange(unsigned) { }
#endif
virtual void colorSpaceDidChange() { }
virtual void minimumSizeForAutoLayoutDidChange() { }
virtual void sizeToContentAutoSizeMaximumSizeDidChange() { }
virtual void windowKindDidChange() { }
virtual void adjustTransientZoom(double, WebCore::FloatPoint) { }
virtual void commitTransientZoom(double, WebCore::FloatPoint) { }
#if PLATFORM(MAC)
virtual void didChangeViewExposedRect();
void viewExposedRectChangedTimerFired();
#endif
virtual void updateDebugIndicator() { }
virtual void waitForDidUpdateActivityState(ActivityStateChangeID) { }
virtual void dispatchAfterEnsuringDrawing(WTF::Function<void (CallbackBase::Error)>&&) { ASSERT_NOT_REACHED(); }
// Hide the content until the currently pending update arrives.
virtual void hideContentUntilPendingUpdate() { ASSERT_NOT_REACHED(); }
// Hide the content until any update arrives.
virtual void hideContentUntilAnyUpdate() { ASSERT_NOT_REACHED(); }
virtual bool hasVisibleContent() const { return true; }
virtual void willSendUpdateGeometry() { }
virtual void prepareForAppSuspension() { }
#if PLATFORM(COCOA)
virtual WTF::MachSendRight createFence();
#endif
virtual void dispatchPresentationCallbacksAfterFlushingLayers(const Vector<CallbackID>&) { }
WebPageProxy& page() const { return m_webPageProxy; }
WebProcessProxy& process() { return m_process.get(); }
const WebProcessProxy& process() const { return m_process.get(); }
protected:
DrawingAreaProxy(DrawingAreaType, WebPageProxy&, WebProcessProxy&);
DrawingAreaType m_type;
DrawingAreaIdentifier m_identifier;
WebPageProxy& m_webPageProxy;
Ref<WebProcessProxy> m_process;
WebCore::IntSize m_size;
WebCore::IntSize m_scrollOffset;
// IPC::MessageReceiver
void didReceiveMessage(IPC::Connection&, IPC::Decoder&) override;
private:
virtual void sizeDidChange() = 0;
IPC::Connection* messageSenderConnection() const final;
uint64_t messageSenderDestinationID() const final { return m_identifier.toUInt64(); }
bool sendMessage(UniqueRef<IPC::Encoder>&&, OptionSet<IPC::SendOption>, std::optional<std::pair<CompletionHandler<void(IPC::Decoder*)>, uint64_t>>&&) final;
// Message handlers.
// FIXME: These should be pure virtual.
virtual void enterAcceleratedCompositingMode(uint64_t /* backingStoreStateID */, const LayerTreeContext&) { }
virtual void updateAcceleratedCompositingMode(uint64_t /* backingStoreStateID */, const LayerTreeContext&) { }
virtual void didFirstLayerFlush(uint64_t /* backingStoreStateID */, const LayerTreeContext&) { }
#if PLATFORM(COCOA)
virtual void didUpdateGeometry() { }
#if PLATFORM(MAC)
RunLoop::Timer<DrawingAreaProxy> m_viewExposedRectChangedTimer;
std::optional<WebCore::FloatRect> m_lastSentViewExposedRect;
#endif // PLATFORM(MAC)
#endif
#if USE(COORDINATED_GRAPHICS) || USE(TEXTURE_MAPPER)
virtual void update(uint64_t /* backingStoreStateID */, const UpdateInfo&) { }
virtual void didUpdateBackingStoreState(uint64_t /* backingStoreStateID */, const UpdateInfo&, const LayerTreeContext&) { }
virtual void exitAcceleratedCompositingMode(uint64_t /* backingStoreStateID */, const UpdateInfo&) { }
#endif
bool m_startedReceivingMessages { false };
};
} // namespace WebKit
#define SPECIALIZE_TYPE_TRAITS_DRAWING_AREA_PROXY(ToValueTypeName, ProxyType) \
SPECIALIZE_TYPE_TRAITS_BEGIN(WebKit::ToValueTypeName) \
static bool isType(const WebKit::DrawingAreaProxy& proxy) { return proxy.type() == WebKit::ProxyType; } \
SPECIALIZE_TYPE_TRAITS_END()
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