381 lines
13 KiB
C++
381 lines
13 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* rendering objects for replaced elements implemented by a plugin */
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#ifndef nsPluginFrame_h___
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#define nsPluginFrame_h___
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#include "mozilla/Attributes.h"
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#include "mozilla/EventForwards.h"
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#include "mozilla/UniquePtr.h"
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#include "nsIObjectFrame.h"
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#include "nsFrame.h"
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#include "nsRegion.h"
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#include "nsDisplayList.h"
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#include "nsIReflowCallback.h"
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#include "Units.h"
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#ifdef XP_WIN
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#include <windows.h> // For HWND :(
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// Undo the windows.h damage
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#undef GetMessage
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#undef CreateEvent
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#undef GetClassName
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#undef GetBinaryType
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#undef RemoveDirectory
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#undef LoadIcon
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#undef LoadImage
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#undef GetObject
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#endif
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class nsPresContext;
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class nsRootPresContext;
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class nsDisplayPlugin;
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class PluginBackgroundSink;
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class nsPluginInstanceOwner;
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namespace mozilla {
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namespace layers {
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class ImageContainer;
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class Layer;
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class LayerManager;
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} // namespace layers
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} // namespace mozilla
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class PluginFrameDidCompositeObserver;
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class nsPluginFrame : public nsFrame
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, public nsIObjectFrame
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, public nsIReflowCallback
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{
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public:
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typedef mozilla::LayerState LayerState;
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typedef mozilla::LayoutDeviceIntPoint LayoutDeviceIntPoint;
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typedef mozilla::LayoutDeviceIntRect LayoutDeviceIntRect;
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typedef mozilla::LayoutDeviceIntRegion LayoutDeviceIntRegion;
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typedef mozilla::layers::Layer Layer;
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typedef mozilla::layers::LayerManager LayerManager;
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typedef mozilla::layers::ImageContainer ImageContainer;
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typedef mozilla::ContainerLayerParameters ContainerLayerParameters;
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NS_DECL_FRAMEARENA_HELPERS
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friend nsIFrame* NS_NewObjectFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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NS_DECL_QUERYFRAME
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NS_DECL_QUERYFRAME_TARGET(nsPluginFrame)
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virtual void Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) override;
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virtual nscoord GetMinISize(nsRenderingContext *aRenderingContext) override;
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virtual nscoord GetPrefISize(nsRenderingContext *aRenderingContext) override;
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virtual void Reflow(nsPresContext* aPresContext,
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ReflowOutput& aDesiredSize,
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const ReflowInput& aReflowInput,
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nsReflowStatus& aStatus) override;
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virtual void DidReflow(nsPresContext* aPresContext,
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const ReflowInput* aReflowInput,
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nsDidReflowStatus aStatus) override;
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virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aLists) override;
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virtual nsresult HandleEvent(nsPresContext* aPresContext,
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mozilla::WidgetGUIEvent* aEvent,
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nsEventStatus* aEventStatus) override;
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virtual nsIAtom* GetType() const override;
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virtual bool IsFrameOfType(uint32_t aFlags) const override
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{
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return nsFrame::IsFrameOfType(aFlags &
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~(nsIFrame::eReplaced | nsIFrame::eReplacedSizing));
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}
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virtual bool NeedsView() override { return true; }
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#ifdef DEBUG_FRAME_DUMP
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virtual nsresult GetFrameName(nsAString& aResult) const override;
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#endif
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virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
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virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext) override;
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NS_IMETHOD GetPluginInstance(nsNPAPIPluginInstance** aPluginInstance) override;
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virtual void SetIsDocumentActive(bool aIsActive) override;
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virtual nsresult GetCursor(const nsPoint& aPoint,
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nsIFrame::Cursor& aCursor) override;
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// APIs used by nsRootPresContext to set up the widget position/size/clip
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// region.
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/**
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* Set the next widget configuration for the plugin to the desired
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* position of the plugin's widget, on the assumption that it is not visible
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* (clipped out or covered by opaque content).
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* This will only be called for plugins which have been registered
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* with the root pres context for geometry updates.
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* If there is no widget associated with the plugin, this will have no effect.
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*/
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void SetEmptyWidgetConfiguration()
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{
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mNextConfigurationBounds = LayoutDeviceIntRect(0,0,0,0);
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mNextConfigurationClipRegion.Clear();
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}
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/**
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* Append the desired widget configuration to aConfigurations.
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*/
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void GetWidgetConfiguration(nsTArray<nsIWidget::Configuration>* aConfigurations);
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LayoutDeviceIntRect GetWidgetlessClipRect() {
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return RegionFromArray(mNextConfigurationClipRegion).GetBounds();
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}
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/**
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* Called after all widget position/size/clip regions have been changed
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* (even if there isn't a widget for this plugin).
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*/
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void DidSetWidgetGeometry();
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// accessibility support
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#ifdef ACCESSIBILITY
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virtual mozilla::a11y::AccType AccessibleType() override;
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#ifdef XP_WIN
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NS_IMETHOD GetPluginPort(HWND *aPort);
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#endif
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#endif
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//local methods
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nsresult PrepForDrawing(nsIWidget *aWidget);
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// for a given aRoot, this walks the frame tree looking for the next outFrame
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static nsIObjectFrame* GetNextObjectFrame(nsPresContext* aPresContext,
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nsIFrame* aRoot);
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// nsIReflowCallback
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virtual bool ReflowFinished() override;
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virtual void ReflowCallbackCanceled() override;
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/**
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* Builds either an ImageLayer or a ReadbackLayer, depending on the type
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* of aItem (TYPE_PLUGIN or TYPE_PLUGIN_READBACK respectively).
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*/
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already_AddRefed<Layer> BuildLayer(nsDisplayListBuilder* aBuilder,
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LayerManager* aManager,
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nsDisplayItem* aItem,
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const ContainerLayerParameters& aContainerParameters);
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LayerState GetLayerState(nsDisplayListBuilder* aBuilder,
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LayerManager* aManager);
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/**
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* Get the rectangle (relative to this frame) which it will paint. Normally
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* the frame's content-box but may be smaller if the plugin is rendering
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* asynchronously and has a different-sized image temporarily.
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*/
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nsRect GetPaintedRect(nsDisplayPlugin* aItem);
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/**
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* If aSupports has a nsPluginFrame, then prepare it for a DocShell swap.
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* @see nsSubDocumentFrame::BeginSwapDocShells.
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* There will be a call to EndSwapDocShells after we were moved to the
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* new view tree.
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*/
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static void BeginSwapDocShells(nsISupports* aSupports, void*);
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/**
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* If aSupports has a nsPluginFrame, then set it up after a DocShell swap.
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* @see nsSubDocumentFrame::EndSwapDocShells.
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*/
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static void EndSwapDocShells(nsISupports* aSupports, void*);
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nsIWidget* GetWidget() override {
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if (!mInnerView) {
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return nullptr;
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}
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return mWidget;
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}
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/**
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* Adjust the plugin's idea of its size, using aSize as its new size.
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* (aSize must be in twips)
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*/
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void FixupWindow(const nsSize& aSize);
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/*
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* Sets up the plugin window and calls SetWindow on the plugin.
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*/
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nsresult CallSetWindow(bool aCheckIsHidden = true);
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void SetInstanceOwner(nsPluginInstanceOwner* aOwner);
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/**
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* HandleWheelEventAsDefaultAction() handles eWheel event as default action.
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* This should be called only when WantsToHandleWheelEventAsDefaultAction()
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* returns true.
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*/
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void HandleWheelEventAsDefaultAction(mozilla::WidgetWheelEvent* aEvent);
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/**
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* WantsToHandleWheelEventAsDefaultAction() returns true if the plugin
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* may want to handle wheel events as default action.
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*/
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bool WantsToHandleWheelEventAsDefaultAction() const;
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protected:
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explicit nsPluginFrame(nsStyleContext* aContext);
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virtual ~nsPluginFrame();
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// NOTE: This frame class does not inherit from |nsLeafFrame|, so
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// this is not a virtual method implementation.
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void GetDesiredSize(nsPresContext* aPresContext,
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const ReflowInput& aReflowInput,
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ReflowOutput& aDesiredSize);
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bool IsFocusable(int32_t *aTabIndex = nullptr,
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bool aWithMouse = false) override;
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// check attributes and optionally CSS to see if we should display anything
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bool IsHidden(bool aCheckVisibilityStyle = true) const;
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bool IsOpaque() const;
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bool IsTransparentMode() const;
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bool IsPaintedByGecko() const;
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nsIntPoint GetWindowOriginInPixels(bool aWindowless);
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/*
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* If this frame is in a remote tab, return the tab offset to
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* the origin of the chrome window. In non-e10s, this return 0,0.
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* This api sends a sync ipc request so be careful about use.
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*/
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LayoutDeviceIntPoint GetRemoteTabChromeOffset();
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static void PaintPrintPlugin(nsIFrame* aFrame,
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nsRenderingContext* aRenderingContext,
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const nsRect& aDirtyRect, nsPoint aPt);
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void PrintPlugin(nsRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect);
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void PaintPlugin(nsDisplayListBuilder* aBuilder,
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nsRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect, const nsRect& aPluginRect);
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void NotifyPluginReflowObservers();
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friend class nsPluginInstanceOwner;
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friend class nsDisplayPlugin;
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friend class PluginBackgroundSink;
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private:
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// Registers the plugin for a geometry update, and requests a geometry
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// update. This caches the root pres context in
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// mRootPresContextRegisteredWith, so that we can be sure we unregister
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// from the right root prest context in UnregisterPluginForGeometryUpdates.
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void RegisterPluginForGeometryUpdates();
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// Unregisters the plugin for geometry updated with the root pres context
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// stored in mRootPresContextRegisteredWith.
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void UnregisterPluginForGeometryUpdates();
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static const LayoutDeviceIntRegion
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RegionFromArray(const nsTArray<LayoutDeviceIntRect>& aRects)
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{
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LayoutDeviceIntRegion region;
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for (uint32_t i = 0; i < aRects.Length(); ++i) {
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region.Or(region, aRects[i]);
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}
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return region;
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}
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class PluginEventNotifier : public mozilla::Runnable {
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public:
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explicit PluginEventNotifier(const nsString &aEventType) :
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mEventType(aEventType) {}
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NS_IMETHOD Run() override;
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private:
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nsString mEventType;
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};
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nsPluginInstanceOwner* mInstanceOwner; // WEAK
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nsView* mInnerView;
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nsCOMPtr<nsIWidget> mWidget;
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nsIntRect mWindowlessRect;
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/**
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* This is owned by the ReadbackLayer for this nsPluginFrame. It is
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* automatically cleared if the PluginBackgroundSink is destroyed.
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*/
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PluginBackgroundSink* mBackgroundSink;
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/**
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* Bounds that we should set the plugin's widget to in the next composite,
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* for plugins with widgets. For plugins without widgets, bounds in device
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* pixels relative to the nearest frame that's a display list reference frame.
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*/
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LayoutDeviceIntRect mNextConfigurationBounds;
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/**
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* Clip region that we should set the plugin's widget to
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* in the next composite. Only meaningful for plugins with widgets.
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*/
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nsTArray<LayoutDeviceIntRect> mNextConfigurationClipRegion;
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bool mReflowCallbackPosted;
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// We keep this reference to ensure we can always unregister the
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// plugins we register on the root PresContext.
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// This is only non-null while we have a plugin registered for geometry
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// updates.
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RefPtr<nsRootPresContext> mRootPresContextRegisteredWith;
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mozilla::UniquePtr<PluginFrameDidCompositeObserver> mDidCompositeObserver;
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};
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class nsDisplayPlugin : public nsDisplayItem {
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public:
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nsDisplayPlugin(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame)
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: nsDisplayItem(aBuilder, aFrame)
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{
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MOZ_COUNT_CTOR(nsDisplayPlugin);
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aBuilder->SetContainsPluginItem();
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}
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#ifdef NS_BUILD_REFCNT_LOGGING
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virtual ~nsDisplayPlugin() {
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MOZ_COUNT_DTOR(nsDisplayPlugin);
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}
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#endif
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virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) override;
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virtual nsRegion GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
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bool* aSnap) override;
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virtual void Paint(nsDisplayListBuilder* aBuilder,
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nsRenderingContext* aCtx) override;
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virtual bool ComputeVisibility(nsDisplayListBuilder* aBuilder,
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nsRegion* aVisibleRegion) override;
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NS_DISPLAY_DECL_NAME("Plugin", TYPE_PLUGIN)
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virtual already_AddRefed<Layer> BuildLayer(nsDisplayListBuilder* aBuilder,
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LayerManager* aManager,
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const ContainerLayerParameters& aContainerParameters) override
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{
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return static_cast<nsPluginFrame*>(mFrame)->BuildLayer(aBuilder,
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aManager,
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this,
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aContainerParameters);
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}
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virtual LayerState GetLayerState(nsDisplayListBuilder* aBuilder,
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LayerManager* aManager,
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const ContainerLayerParameters& aParameters) override
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{
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return static_cast<nsPluginFrame*>(mFrame)->GetLayerState(aBuilder,
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aManager);
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}
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};
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#endif /* nsPluginFrame_h___ */
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