gecko-dev/layout/generic/nsObjectFrame.h
2013-10-02 12:46:03 +09:00

339 lines
12 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* rendering objects for replaced elements implemented by a plugin */
#ifndef nsObjectFrame_h___
#define nsObjectFrame_h___
#include "mozilla/Attributes.h"
#include "nsIObjectFrame.h"
#include "nsFrame.h"
#include "nsRegion.h"
#include "nsDisplayList.h"
#include "nsIReflowCallback.h"
#ifdef XP_WIN
#include <windows.h> // For HWND :(
#endif
class nsPresContext;
class nsRootPresContext;
class nsDisplayPlugin;
class nsIOSurface;
class PluginBackgroundSink;
class nsPluginInstanceOwner;
namespace mozilla {
namespace layers {
class ImageContainer;
class Layer;
class LayerManager;
}
}
#define nsObjectFrameSuper nsFrame
class nsObjectFrame : public nsObjectFrameSuper,
public nsIObjectFrame,
public nsIReflowCallback {
public:
typedef mozilla::LayerState LayerState;
typedef mozilla::layers::Layer Layer;
typedef mozilla::layers::LayerManager LayerManager;
typedef mozilla::layers::ImageContainer ImageContainer;
typedef mozilla::FrameLayerBuilder::ContainerParameters ContainerParameters;
NS_DECL_FRAMEARENA_HELPERS
friend nsIFrame* NS_NewObjectFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
NS_DECL_QUERYFRAME
NS_DECL_QUERYFRAME_TARGET(nsObjectFrame)
virtual void Init(nsIContent* aContent,
nsIFrame* aParent,
nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext);
virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext);
NS_IMETHOD Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD DidReflow(nsPresContext* aPresContext,
const nsHTMLReflowState* aReflowState,
nsDidReflowStatus aStatus);
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists) MOZ_OVERRIDE;
NS_IMETHOD HandleEvent(nsPresContext* aPresContext,
mozilla::WidgetGUIEvent* aEvent,
nsEventStatus* aEventStatus);
virtual nsIAtom* GetType() const;
virtual bool IsFrameOfType(uint32_t aFlags) const
{
return nsObjectFrameSuper::IsFrameOfType(aFlags & ~(nsIFrame::eReplaced));
}
virtual bool NeedsView() { return true; }
#ifdef DEBUG
NS_IMETHOD GetFrameName(nsAString& aResult) const;
#endif
virtual void DestroyFrom(nsIFrame* aDestructRoot);
virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext);
NS_METHOD GetPluginInstance(nsNPAPIPluginInstance** aPluginInstance) MOZ_OVERRIDE;
virtual void SetIsDocumentActive(bool aIsActive) MOZ_OVERRIDE;
NS_IMETHOD GetCursor(const nsPoint& aPoint, nsIFrame::Cursor& aCursor);
// APIs used by nsRootPresContext to set up the widget position/size/clip
// region.
/**
* Set the next widget configuration for the plugin to the desired
* position of the plugin's widget, on the assumption that it is not visible
* (clipped out or covered by opaque content).
* This will only be called for plugins which have been registered
* with the root pres context for geometry updates.
* If there is no widget associated with the plugin, this will have no effect.
*/
void SetEmptyWidgetConfiguration()
{
mNextConfigurationBounds = nsIntRect(0,0,0,0);
mNextConfigurationClipRegion.Clear();
}
/**
* Append the desired widget configuration to aConfigurations.
*/
void GetWidgetConfiguration(nsTArray<nsIWidget::Configuration>* aConfigurations)
{
if (mWidget) {
if (!mWidget->GetParent()) {
// Plugin widgets should not be toplevel except when they're out of the
// document, in which case the plugin should not be registered for
// geometry updates and this should not be called. But apparently we
// have bugs where mWidget sometimes is toplevel here. Bail out.
NS_ERROR("Plugin widgets registered for geometry updates should not be toplevel");
return;
}
nsIWidget::Configuration* configuration = aConfigurations->AppendElement();
configuration->mChild = mWidget;
configuration->mBounds = mNextConfigurationBounds;
configuration->mClipRegion = mNextConfigurationClipRegion;
}
}
/**
* Called after all widget position/size/clip regions have been changed
* (even if there isn't a widget for this plugin).
*/
void DidSetWidgetGeometry();
// accessibility support
#ifdef ACCESSIBILITY
virtual mozilla::a11y::AccType AccessibleType() MOZ_OVERRIDE;
#ifdef XP_WIN
NS_IMETHOD GetPluginPort(HWND *aPort);
#endif
#endif
//local methods
nsresult PrepForDrawing(nsIWidget *aWidget);
// for a given aRoot, this walks the frame tree looking for the next outFrame
static nsIObjectFrame* GetNextObjectFrame(nsPresContext* aPresContext,
nsIFrame* aRoot);
// nsIReflowCallback
virtual bool ReflowFinished() MOZ_OVERRIDE;
virtual void ReflowCallbackCanceled() MOZ_OVERRIDE;
/**
* Builds either an ImageLayer or a ReadbackLayer, depending on the type
* of aItem (TYPE_PLUGIN or TYPE_PLUGIN_READBACK respectively).
*/
already_AddRefed<Layer> BuildLayer(nsDisplayListBuilder* aBuilder,
LayerManager* aManager,
nsDisplayItem* aItem,
const ContainerParameters& aContainerParameters);
LayerState GetLayerState(nsDisplayListBuilder* aBuilder,
LayerManager* aManager);
/**
* Get the rectangle (relative to this frame) which it will paint. Normally
* the frame's content-box but may be smaller if the plugin is rendering
* asynchronously and has a different-sized image temporarily.
*/
nsRect GetPaintedRect(nsDisplayPlugin* aItem);
/**
* If aContent has a nsObjectFrame, then prepare it for a DocShell swap.
* @see nsSubDocumentFrame::BeginSwapDocShells.
* There will be a call to EndSwapDocShells after we were moved to the
* new view tree.
*/
static void BeginSwapDocShells(nsIContent* aContent, void*);
/**
* If aContent has a nsObjectFrame, then set it up after a DocShell swap.
* @see nsSubDocumentFrame::EndSwapDocShells.
*/
static void EndSwapDocShells(nsIContent* aContent, void*);
nsIWidget* GetWidget() MOZ_OVERRIDE { return mInnerView ? mWidget : nullptr; }
/**
* Adjust the plugin's idea of its size, using aSize as its new size.
* (aSize must be in twips)
*/
void FixupWindow(const nsSize& aSize);
/*
* Sets up the plugin window and calls SetWindow on the plugin.
*/
nsresult CallSetWindow(bool aCheckIsHidden = true);
void SetInstanceOwner(nsPluginInstanceOwner* aOwner);
protected:
nsObjectFrame(nsStyleContext* aContext);
virtual ~nsObjectFrame();
// NOTE: This frame class does not inherit from |nsLeafFrame|, so
// this is not a virtual method implementation.
void GetDesiredSize(nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsHTMLReflowMetrics& aDesiredSize);
bool IsFocusable(int32_t *aTabIndex = nullptr, bool aWithMouse = false);
// check attributes and optionally CSS to see if we should display anything
bool IsHidden(bool aCheckVisibilityStyle = true) const;
bool IsOpaque() const;
bool IsTransparentMode() const;
bool IsPaintedByGecko() const;
nsIntPoint GetWindowOriginInPixels(bool aWindowless);
static void PaintPrintPlugin(nsIFrame* aFrame,
nsRenderingContext* aRenderingContext,
const nsRect& aDirtyRect, nsPoint aPt);
void PrintPlugin(nsRenderingContext& aRenderingContext,
const nsRect& aDirtyRect);
void PaintPlugin(nsDisplayListBuilder* aBuilder,
nsRenderingContext& aRenderingContext,
const nsRect& aDirtyRect, const nsRect& aPluginRect);
void NotifyPluginReflowObservers();
friend class nsPluginInstanceOwner;
friend class nsDisplayPlugin;
friend class PluginBackgroundSink;
private:
// Registers the plugin for a geometry update, and requests a geometry
// update. This caches the root pres context in
// mRootPresContextRegisteredWith, so that we can be sure we unregister
// from the right root prest context in UnregisterPluginForGeometryUpdates.
void RegisterPluginForGeometryUpdates();
// Unregisters the plugin for geometry updated with the root pres context
// stored in mRootPresContextRegisteredWith.
void UnregisterPluginForGeometryUpdates();
class PluginEventNotifier : public nsRunnable {
public:
PluginEventNotifier(const nsString &aEventType) :
mEventType(aEventType) {}
NS_IMETHOD Run() MOZ_OVERRIDE;
private:
nsString mEventType;
};
nsPluginInstanceOwner* mInstanceOwner; // WEAK
nsView* mInnerView;
nsCOMPtr<nsIWidget> mWidget;
nsIntRect mWindowlessRect;
/**
* This is owned by the ReadbackLayer for this nsObjectFrame. It is
* automatically cleared if the PluginBackgroundSink is destroyed.
*/
PluginBackgroundSink* mBackgroundSink;
/**
* Bounds that we should set the plugin's widget to in the next composite,
* for plugins with widgets. For plugins without widgets, bounds in device
* pixels relative to the nearest frame that's a display list reference frame.
*/
nsIntRect mNextConfigurationBounds;
/**
* Clip region that we should set the plugin's widget to
* in the next composite. Only meaningful for plugins with widgets.
*/
nsTArray<nsIntRect> mNextConfigurationClipRegion;
bool mReflowCallbackPosted;
// We keep this reference to ensure we can always unregister the
// plugins we register on the root PresContext.
// This is only non-null while we have a plugin registered for geometry
// updates.
nsRefPtr<nsRootPresContext> mRootPresContextRegisteredWith;
};
class nsDisplayPlugin : public nsDisplayItem {
public:
nsDisplayPlugin(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame)
: nsDisplayItem(aBuilder, aFrame)
{
MOZ_COUNT_CTOR(nsDisplayPlugin);
aBuilder->SetContainsPluginItem();
}
#ifdef NS_BUILD_REFCNT_LOGGING
virtual ~nsDisplayPlugin() {
MOZ_COUNT_DTOR(nsDisplayPlugin);
}
#endif
virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) MOZ_OVERRIDE;
virtual nsRegion GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
bool* aSnap) MOZ_OVERRIDE;
virtual void Paint(nsDisplayListBuilder* aBuilder,
nsRenderingContext* aCtx) MOZ_OVERRIDE;
virtual bool ComputeVisibility(nsDisplayListBuilder* aBuilder,
nsRegion* aVisibleRegion,
const nsRect& aAllowVisibleRegionExpansion) MOZ_OVERRIDE;
NS_DISPLAY_DECL_NAME("Plugin", TYPE_PLUGIN)
virtual already_AddRefed<Layer> BuildLayer(nsDisplayListBuilder* aBuilder,
LayerManager* aManager,
const ContainerParameters& aContainerParameters) MOZ_OVERRIDE
{
return static_cast<nsObjectFrame*>(mFrame)->BuildLayer(aBuilder,
aManager,
this,
aContainerParameters);
}
virtual LayerState GetLayerState(nsDisplayListBuilder* aBuilder,
LayerManager* aManager,
const ContainerParameters& aParameters) MOZ_OVERRIDE
{
return static_cast<nsObjectFrame*>(mFrame)->GetLayerState(aBuilder,
aManager);
}
};
#endif /* nsObjectFrame_h___ */