mirror of
https://github.com/mozilla/gecko-dev.git
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87802cdbad
Backed out changeset c5b352c74b35 (bug 1225007) Backed out changeset 8a513c70ce7c (bug 1225007)
595 lines
25 KiB
C++
595 lines
25 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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#ifndef nsBaseWidget_h__
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#define nsBaseWidget_h__
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#include "mozilla/EventForwards.h"
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#include "mozilla/WidgetUtils.h"
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#include "mozilla/layers/APZCCallbackHelper.h"
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#include "nsRect.h"
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#include "nsIWidget.h"
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#include "nsWidgetsCID.h"
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#include "nsIFile.h"
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#include "nsString.h"
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#include "nsCOMPtr.h"
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#include "nsAutoPtr.h"
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#include "nsIRollupListener.h"
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#include "nsIObserver.h"
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#include "nsIWidgetListener.h"
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#include "nsPIDOMWindow.h"
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#include "nsWeakReference.h"
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#include <algorithm>
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class nsIContent;
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class nsAutoRollup;
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class gfxContext;
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namespace mozilla {
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#ifdef ACCESSIBILITY
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namespace a11y {
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class Accessible;
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}
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#endif
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namespace layers {
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class BasicLayerManager;
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class CompositorChild;
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class CompositorParent;
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class APZCTreeManager;
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class GeckoContentController;
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class APZEventState;
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struct ScrollableLayerGuid;
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} // namespace layers
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class CompositorVsyncDispatcher;
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} // namespace mozilla
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namespace base {
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class Thread;
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} // namespace base
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// Windows specific constant indicating the maximum number of touch points the
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// inject api will allow. This also sets the maximum numerical value for touch
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// ids we can use when injecting touch points on Windows.
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#define TOUCH_INJECT_MAX_POINTS 256
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class nsBaseWidget;
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// Helper class used in shutting down gfx related code.
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class WidgetShutdownObserver final : public nsIObserver
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{
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~WidgetShutdownObserver();
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public:
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explicit WidgetShutdownObserver(nsBaseWidget* aWidget);
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NS_DECL_ISUPPORTS
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NS_DECL_NSIOBSERVER
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void Register();
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void Unregister();
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nsBaseWidget *mWidget;
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bool mRegistered;
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};
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/**
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* Common widget implementation used as base class for native
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* or crossplatform implementations of Widgets.
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* All cross-platform behavior that all widgets need to implement
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* should be placed in this class.
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* (Note: widget implementations are not required to use this
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* class, but it gives them a head start.)
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*/
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class nsBaseWidget : public nsIWidget, public nsSupportsWeakReference
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{
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friend class nsAutoRollup;
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friend class DispatchWheelEventOnMainThread;
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protected:
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typedef base::Thread Thread;
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typedef mozilla::layers::BasicLayerManager BasicLayerManager;
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typedef mozilla::layers::BufferMode BufferMode;
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typedef mozilla::layers::CompositorChild CompositorChild;
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typedef mozilla::layers::CompositorParent CompositorParent;
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typedef mozilla::layers::APZCTreeManager APZCTreeManager;
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typedef mozilla::layers::GeckoContentController GeckoContentController;
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typedef mozilla::layers::ScrollableLayerGuid ScrollableLayerGuid;
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typedef mozilla::layers::APZEventState APZEventState;
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typedef mozilla::layers::SetAllowedTouchBehaviorCallback SetAllowedTouchBehaviorCallback;
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typedef mozilla::CSSIntRect CSSIntRect;
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typedef mozilla::ScreenRotation ScreenRotation;
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virtual ~nsBaseWidget();
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public:
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nsBaseWidget();
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NS_DECL_ISUPPORTS
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// nsIWidget interface
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NS_IMETHOD CaptureMouse(bool aCapture) override;
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virtual nsIWidgetListener* GetWidgetListener() override;
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virtual void SetWidgetListener(nsIWidgetListener* alistener) override;
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NS_IMETHOD Destroy() override;
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NS_IMETHOD SetParent(nsIWidget* aNewParent) override;
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virtual nsIWidget* GetParent(void) override;
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virtual nsIWidget* GetTopLevelWidget() override;
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virtual nsIWidget* GetSheetWindowParent(void) override;
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virtual float GetDPI() override;
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virtual void AddChild(nsIWidget* aChild) override;
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virtual void RemoveChild(nsIWidget* aChild) override;
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void SetZIndex(int32_t aZIndex) override;
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NS_IMETHOD PlaceBehind(nsTopLevelWidgetZPlacement aPlacement,
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nsIWidget *aWidget, bool aActivate) override;
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NS_IMETHOD SetSizeMode(nsSizeMode aMode) override;
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virtual nsSizeMode SizeMode() override
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{
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return mSizeMode;
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}
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virtual nsCursor GetCursor() override;
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NS_IMETHOD SetCursor(nsCursor aCursor) override;
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NS_IMETHOD SetCursor(imgIContainer* aCursor,
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uint32_t aHotspotX, uint32_t aHotspotY) override;
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virtual void ClearCachedCursor() override { mUpdateCursor = true; }
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virtual void SetTransparencyMode(nsTransparencyMode aMode) override;
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virtual nsTransparencyMode GetTransparencyMode() override;
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virtual void GetWindowClipRegion(nsTArray<nsIntRect>* aRects) override;
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NS_IMETHOD SetWindowShadowStyle(int32_t aStyle) override;
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virtual void SetShowsToolbarButton(bool aShow) override {}
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virtual void SetShowsFullScreenButton(bool aShow) override {}
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virtual void SetWindowAnimationType(WindowAnimationType aType) override {}
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NS_IMETHOD HideWindowChrome(bool aShouldHide) override;
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virtual bool PrepareForFullscreenTransition(nsISupports** aData) override { return false; }
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virtual void PerformFullscreenTransition(FullscreenTransitionStage aStage,
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uint16_t aDuration,
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nsISupports* aData,
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nsIRunnable* aCallback) override;
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NS_IMETHOD MakeFullScreen(bool aFullScreen, nsIScreen* aScreen = nullptr) override;
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virtual LayerManager* GetLayerManager(PLayerTransactionChild* aShadowManager = nullptr,
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LayersBackend aBackendHint = mozilla::layers::LayersBackend::LAYERS_NONE,
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LayerManagerPersistence aPersistence = LAYER_MANAGER_CURRENT,
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bool* aAllowRetaining = nullptr) override;
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CompositorVsyncDispatcher* GetCompositorVsyncDispatcher() override;
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void CreateCompositorVsyncDispatcher();
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virtual CompositorParent* NewCompositorParent(int aSurfaceWidth, int aSurfaceHeight);
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virtual void CreateCompositor();
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virtual void CreateCompositor(int aWidth, int aHeight);
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virtual void PrepareWindowEffects() override {}
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virtual void CleanupWindowEffects() override {}
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virtual bool PreRender(LayerManagerComposite* aManager) override { return true; }
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virtual void PostRender(LayerManagerComposite* aManager) override {}
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virtual void DrawWindowUnderlay(LayerManagerComposite* aManager, nsIntRect aRect) override {}
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virtual void DrawWindowOverlay(LayerManagerComposite* aManager, nsIntRect aRect) override {}
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virtual already_AddRefed<mozilla::gfx::DrawTarget> StartRemoteDrawing() override;
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virtual void EndRemoteDrawing() override { };
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virtual void CleanupRemoteDrawing() override { };
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virtual void UpdateThemeGeometries(const nsTArray<ThemeGeometry>& aThemeGeometries) override {}
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NS_IMETHOD SetModal(bool aModal) override;
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virtual uint32_t GetMaxTouchPoints() const override;
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NS_IMETHOD SetWindowClass(const nsAString& xulWinType) override;
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virtual nsresult SetWindowClipRegion(const nsTArray<nsIntRect>& aRects, bool aIntersectWithExisting) override;
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// Return whether this widget interprets parameters to Move and Resize APIs
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// as "global display pixels" rather than "device pixels", and therefore
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// applies its GetDefaultScale() value to them before using them as mBounds
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// etc (which are always stored in device pixels).
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// Note that APIs that -get- the widget's position/size/bounds, rather than
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// -setting- them (i.e. moving or resizing the widget) will always return
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// values in the widget's device pixels.
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bool BoundsUseDisplayPixels() const {
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return mWindowType <= eWindowType_popup;
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}
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NS_IMETHOD MoveClient(double aX, double aY) override;
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NS_IMETHOD ResizeClient(double aWidth, double aHeight, bool aRepaint) override;
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NS_IMETHOD ResizeClient(double aX, double aY, double aWidth, double aHeight, bool aRepaint) override;
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NS_IMETHOD GetBounds(LayoutDeviceIntRect& aRect) override;
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NS_IMETHOD GetClientBounds(LayoutDeviceIntRect& aRect) override;
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NS_IMETHOD GetScreenBounds(LayoutDeviceIntRect& aRect) override;
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NS_IMETHOD GetRestoredBounds(LayoutDeviceIntRect& aRect) override;
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NS_IMETHOD GetNonClientMargins(LayoutDeviceIntMargin& aMargins) override;
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NS_IMETHOD SetNonClientMargins(LayoutDeviceIntMargin& aMargins) override;
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virtual LayoutDeviceIntPoint GetClientOffset() override;
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NS_IMETHOD EnableDragDrop(bool aEnable) override;
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NS_IMETHOD GetAttention(int32_t aCycleCount) override;
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virtual bool HasPendingInputEvent() override;
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NS_IMETHOD SetIcon(const nsAString &anIconSpec) override;
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NS_IMETHOD SetWindowTitlebarColor(nscolor aColor, bool aActive) override;
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virtual void SetDrawsInTitlebar(bool aState) override {}
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virtual bool ShowsResizeIndicator(nsIntRect* aResizerRect) override;
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virtual void FreeNativeData(void * data, uint32_t aDataType) override {}
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NS_IMETHOD BeginResizeDrag(mozilla::WidgetGUIEvent* aEvent,
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int32_t aHorizontal,
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int32_t aVertical) override;
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NS_IMETHOD BeginMoveDrag(mozilla::WidgetMouseEvent* aEvent) override;
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virtual nsresult ActivateNativeMenuItemAt(const nsAString& indexString) override { return NS_ERROR_NOT_IMPLEMENTED; }
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virtual nsresult ForceUpdateNativeMenuAt(const nsAString& indexString) override { return NS_ERROR_NOT_IMPLEMENTED; }
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NS_IMETHOD NotifyIME(const IMENotification& aIMENotification) override final;
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NS_IMETHOD StartPluginIME(const mozilla::WidgetKeyboardEvent& aKeyboardEvent,
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int32_t aPanelX, int32_t aPanelY,
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nsString& aCommitted) override
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{ return NS_ERROR_NOT_IMPLEMENTED; }
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NS_IMETHOD SetPluginFocused(bool& aFocused) override
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{ return NS_ERROR_NOT_IMPLEMENTED; }
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NS_IMETHOD AttachNativeKeyEvent(mozilla::WidgetKeyboardEvent& aEvent) override { return NS_ERROR_NOT_IMPLEMENTED; }
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NS_IMETHOD_(bool) ExecuteNativeKeyBinding(
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NativeKeyBindingsType aType,
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const mozilla::WidgetKeyboardEvent& aEvent,
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DoCommandCallback aCallback,
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void* aCallbackData) override { return false; }
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virtual bool ComputeShouldAccelerate();
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virtual nsIMEUpdatePreference GetIMEUpdatePreference() override { return nsIMEUpdatePreference(); }
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NS_IMETHOD OnDefaultButtonLoaded(const LayoutDeviceIntRect& aButtonRect) override { return NS_ERROR_NOT_IMPLEMENTED; }
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NS_IMETHOD OverrideSystemMouseScrollSpeed(double aOriginalDeltaX,
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double aOriginalDeltaY,
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double& aOverriddenDeltaX,
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double& aOverriddenDeltaY) override;
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virtual already_AddRefed<nsIWidget>
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CreateChild(const nsIntRect &aRect,
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nsWidgetInitData *aInitData = nullptr,
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bool aForceUseIWidgetParent = false) override;
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NS_IMETHOD AttachViewToTopLevel(bool aUseAttachedEvents) override;
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virtual nsIWidgetListener* GetAttachedWidgetListener() override;
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virtual void SetAttachedWidgetListener(nsIWidgetListener* aListener) override;
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virtual nsIWidgetListener* GetPreviouslyAttachedWidgetListener() override;
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virtual void SetPreviouslyAttachedWidgetListener(nsIWidgetListener* aListener) override;
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NS_IMETHOD_(TextEventDispatcher*) GetTextEventDispatcher() override final;
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// Helper function for dispatching events which are not processed by APZ,
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// but need to be transformed by APZ.
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nsEventStatus DispatchInputEvent(mozilla::WidgetInputEvent* aEvent) override;
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// Dispatch an event that must be first be routed through APZ.
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nsEventStatus DispatchAPZAwareEvent(mozilla::WidgetInputEvent* aEvent) override;
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void SetConfirmedTargetAPZC(uint64_t aInputBlockId,
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const nsTArray<ScrollableLayerGuid>& aTargets) const override;
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void UpdateZoomConstraints(const uint32_t& aPresShellId,
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const FrameMetrics::ViewID& aViewId,
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const mozilla::Maybe<ZoomConstraints>& aConstraints) override;
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bool AsyncPanZoomEnabled() const override;
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void NotifyWindowDestroyed();
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void NotifySizeMoveDone();
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void NotifyWindowMoved(int32_t aX, int32_t aY);
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// Register plugin windows for remote updates from the compositor
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virtual void RegisterPluginWindowForRemoteUpdates() override;
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virtual void UnregisterPluginWindowForRemoteUpdates() override;
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virtual void SetNativeData(uint32_t aDataType, uintptr_t aVal) override {};
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// Should be called by derived implementations to notify on system color and
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// theme changes.
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void NotifySysColorChanged();
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void NotifyThemeChanged();
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void NotifyUIStateChanged(UIStateChangeType aShowAccelerators,
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UIStateChangeType aShowFocusRings);
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#ifdef ACCESSIBILITY
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// Get the accessible for the window.
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mozilla::a11y::Accessible* GetRootAccessible();
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#endif
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nsPopupLevel PopupLevel() { return mPopupLevel; }
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virtual LayoutDeviceIntSize
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ClientToWindowSize(const LayoutDeviceIntSize& aClientSize) override
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{
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return aClientSize;
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}
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// return the widget's outside dimensions
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// in global coordinates in display pixel.
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CSSIntRect GetScaledScreenBounds();
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// return the screen the widget is in.
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already_AddRefed<nsIScreen> GetWidgetScreen();
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// return true if this is a popup widget with a native titlebar
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bool IsPopupWithTitleBar() const
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{
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return (mWindowType == eWindowType_popup &&
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mBorderStyle != eBorderStyle_default &&
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mBorderStyle & eBorderStyle_title);
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}
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NS_IMETHOD ReparentNativeWidget(nsIWidget* aNewParent) override = 0;
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virtual uint32_t GetGLFrameBufferFormat() override;
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virtual const SizeConstraints& GetSizeConstraints() const override;
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virtual void SetSizeConstraints(const SizeConstraints& aConstraints) override;
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virtual bool CaptureWidgetOnScreen(RefPtr<mozilla::gfx::DrawTarget> aDT) override {
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return false;
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}
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virtual void StartAsyncScrollbarDrag(const AsyncDragMetrics& aDragMetrics) override;
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/**
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* Use this when GetLayerManager() returns a BasicLayerManager
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* (nsBaseWidget::GetLayerManager() does). This sets up the widget's
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* layer manager to temporarily render into aTarget.
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*
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* |aNaturalWidgetBounds| is the un-rotated bounds of |aWidget|.
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* |aRotation| is the "virtual rotation" to apply when rendering to
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* the target. When |aRotation| is ROTATION_0,
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* |aNaturalWidgetBounds| is not used.
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*/
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class AutoLayerManagerSetup {
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public:
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AutoLayerManagerSetup(nsBaseWidget* aWidget, gfxContext* aTarget,
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BufferMode aDoubleBuffering,
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ScreenRotation aRotation = mozilla::ROTATION_0);
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~AutoLayerManagerSetup();
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private:
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nsBaseWidget* mWidget;
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RefPtr<BasicLayerManager> mLayerManager;
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};
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friend class AutoLayerManagerSetup;
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virtual bool ShouldUseOffMainThreadCompositing();
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static nsIRollupListener* GetActiveRollupListener();
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void Shutdown();
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protected:
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void ResolveIconName(const nsAString &aIconName,
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const nsAString &aIconSuffix,
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nsIFile **aResult);
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virtual void OnDestroy();
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void BaseCreate(nsIWidget *aParent,
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const nsIntRect &aRect,
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nsWidgetInitData *aInitData);
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virtual void ConfigureAPZCTreeManager();
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virtual void ConfigureAPZControllerThread();
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virtual already_AddRefed<GeckoContentController> CreateRootContentController();
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// Dispatch an event that has already been routed through APZ.
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nsEventStatus ProcessUntransformedAPZEvent(mozilla::WidgetInputEvent* aEvent,
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const ScrollableLayerGuid& aGuid,
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uint64_t aInputBlockId,
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nsEventStatus aApzResponse);
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const nsIntRegion RegionFromArray(const nsTArray<nsIntRect>& aRects);
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void ArrayFromRegion(const nsIntRegion& aRegion, nsTArray<nsIntRect>& aRects);
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virtual nsIContent* GetLastRollup() override
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{
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return mLastRollup;
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}
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virtual nsresult SynthesizeNativeKeyEvent(int32_t aNativeKeyboardLayout,
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int32_t aNativeKeyCode,
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uint32_t aModifierFlags,
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const nsAString& aCharacters,
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const nsAString& aUnmodifiedCharacters,
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nsIObserver* aObserver) override
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{
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mozilla::widget::AutoObserverNotifier notifier(aObserver, "keyevent");
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return NS_ERROR_UNEXPECTED;
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}
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virtual nsresult SynthesizeNativeMouseEvent(LayoutDeviceIntPoint aPoint,
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uint32_t aNativeMessage,
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uint32_t aModifierFlags,
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nsIObserver* aObserver) override
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{
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mozilla::widget::AutoObserverNotifier notifier(aObserver, "mouseevent");
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return NS_ERROR_UNEXPECTED;
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}
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virtual nsresult SynthesizeNativeMouseMove(LayoutDeviceIntPoint aPoint,
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nsIObserver* aObserver) override
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{
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mozilla::widget::AutoObserverNotifier notifier(aObserver, "mouseevent");
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return NS_ERROR_UNEXPECTED;
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}
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virtual nsresult SynthesizeNativeMouseScrollEvent(LayoutDeviceIntPoint aPoint,
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uint32_t aNativeMessage,
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double aDeltaX,
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double aDeltaY,
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double aDeltaZ,
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uint32_t aModifierFlags,
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uint32_t aAdditionalFlags,
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nsIObserver* aObserver) override
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{
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mozilla::widget::AutoObserverNotifier notifier(aObserver, "mousescrollevent");
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return NS_ERROR_UNEXPECTED;
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}
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virtual nsresult SynthesizeNativeTouchPoint(uint32_t aPointerId,
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TouchPointerState aPointerState,
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nsIntPoint aPointerScreenPoint,
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double aPointerPressure,
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uint32_t aPointerOrientation,
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nsIObserver* aObserver) override
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{
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mozilla::widget::AutoObserverNotifier notifier(aObserver, "touchpoint");
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return NS_ERROR_UNEXPECTED;
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}
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virtual nsresult NotifyIMEInternal(const IMENotification& aIMENotification)
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{ return NS_ERROR_NOT_IMPLEMENTED; }
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protected:
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// Utility to check if an array of clip rects is equal to our
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// internally stored clip rect array mClipRects.
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bool IsWindowClipRegionEqual(const nsTArray<nsIntRect>& aRects);
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// Stores the clip rectangles in aRects into mClipRects.
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void StoreWindowClipRegion(const nsTArray<nsIntRect>& aRects);
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virtual already_AddRefed<nsIWidget>
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AllocateChildPopupWidget()
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{
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static NS_DEFINE_IID(kCPopUpCID, NS_CHILD_CID);
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nsCOMPtr<nsIWidget> widget = do_CreateInstance(kCPopUpCID);
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return widget.forget();
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}
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LayerManager* CreateBasicLayerManager();
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nsPopupType PopupType() const { return mPopupType; }
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void NotifyRollupGeometryChange()
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{
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// XULPopupManager isn't interested in this notification, so only
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// send it if gRollupListener is set.
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if (gRollupListener) {
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gRollupListener->NotifyGeometryChange();
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}
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}
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/**
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* Apply the current size constraints to the given size.
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*
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* @param aWidth width to constrain
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* @param aHeight height to constrain
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*/
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void ConstrainSize(int32_t* aWidth, int32_t* aHeight) const
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{
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*aWidth = std::max(mSizeConstraints.mMinSize.width,
|
|
std::min(mSizeConstraints.mMaxSize.width, *aWidth));
|
|
*aHeight = std::max(mSizeConstraints.mMinSize.height,
|
|
std::min(mSizeConstraints.mMaxSize.height, *aHeight));
|
|
}
|
|
|
|
virtual CompositorChild* GetRemoteRenderer() override;
|
|
|
|
/**
|
|
* Notify the widget that this window is being used with OMTC.
|
|
*/
|
|
virtual void WindowUsesOMTC() {}
|
|
virtual void RegisterTouchWindow() {}
|
|
|
|
nsIDocument* GetDocument() const;
|
|
|
|
protected:
|
|
/**
|
|
* Starts the OMTC compositor destruction sequence.
|
|
*
|
|
* When this function returns, the compositor should not be
|
|
* able to access the opengl context anymore.
|
|
* It is safe to call it several times if platform implementations
|
|
* require the compositor to be destroyed before ~nsBaseWidget is
|
|
* reached (This is the case with gtk2 for instance).
|
|
*/
|
|
virtual void DestroyCompositor();
|
|
void DestroyLayerManager();
|
|
|
|
void FreeShutdownObserver();
|
|
|
|
nsIWidgetListener* mWidgetListener;
|
|
nsIWidgetListener* mAttachedWidgetListener;
|
|
nsIWidgetListener* mPreviouslyAttachedWidgetListener;
|
|
RefPtr<LayerManager> mLayerManager;
|
|
RefPtr<CompositorChild> mCompositorChild;
|
|
RefPtr<CompositorParent> mCompositorParent;
|
|
RefPtr<mozilla::CompositorVsyncDispatcher> mCompositorVsyncDispatcher;
|
|
RefPtr<APZCTreeManager> mAPZC;
|
|
RefPtr<APZEventState> mAPZEventState;
|
|
SetAllowedTouchBehaviorCallback mSetAllowedTouchBehaviorCallback;
|
|
RefPtr<WidgetShutdownObserver> mShutdownObserver;
|
|
RefPtr<TextEventDispatcher> mTextEventDispatcher;
|
|
nsCursor mCursor;
|
|
nsBorderStyle mBorderStyle;
|
|
nsIntRect mBounds;
|
|
CSSIntRect* mOriginalBounds;
|
|
// When this pointer is null, the widget is not clipped
|
|
mozilla::UniquePtr<nsIntRect[]> mClipRects;
|
|
uint32_t mClipRectCount;
|
|
nsSizeMode mSizeMode;
|
|
nsPopupLevel mPopupLevel;
|
|
nsPopupType mPopupType;
|
|
SizeConstraints mSizeConstraints;
|
|
|
|
bool mUpdateCursor;
|
|
bool mUseAttachedEvents;
|
|
bool mIMEHasFocus;
|
|
|
|
static nsIRollupListener* gRollupListener;
|
|
|
|
// the last rolled up popup. Only set this when an nsAutoRollup is in scope,
|
|
// so it can be cleared automatically.
|
|
static nsIContent* mLastRollup;
|
|
|
|
struct InitialZoomConstraints {
|
|
InitialZoomConstraints(const uint32_t& aPresShellID,
|
|
const FrameMetrics::ViewID& aViewID,
|
|
const ZoomConstraints& aConstraints)
|
|
: mPresShellID(aPresShellID), mViewID(aViewID), mConstraints(aConstraints)
|
|
{
|
|
}
|
|
|
|
uint32_t mPresShellID;
|
|
FrameMetrics::ViewID mViewID;
|
|
ZoomConstraints mConstraints;
|
|
};
|
|
|
|
mozilla::Maybe<InitialZoomConstraints> mInitialZoomConstraints;
|
|
|
|
#ifdef DEBUG
|
|
protected:
|
|
static nsAutoString debug_GuiEventToString(mozilla::WidgetGUIEvent* aGuiEvent);
|
|
static bool debug_WantPaintFlashing();
|
|
|
|
static void debug_DumpInvalidate(FILE * aFileOut,
|
|
nsIWidget * aWidget,
|
|
const nsIntRect * aRect,
|
|
const nsAutoCString & aWidgetName,
|
|
int32_t aWindowID);
|
|
|
|
static void debug_DumpEvent(FILE* aFileOut,
|
|
nsIWidget* aWidget,
|
|
mozilla::WidgetGUIEvent* aGuiEvent,
|
|
const nsAutoCString& aWidgetName,
|
|
int32_t aWindowID);
|
|
|
|
static void debug_DumpPaintEvent(FILE * aFileOut,
|
|
nsIWidget * aWidget,
|
|
const nsIntRegion & aPaintEvent,
|
|
const nsAutoCString & aWidgetName,
|
|
int32_t aWindowID);
|
|
|
|
static bool debug_GetCachedBoolPref(const char* aPrefName);
|
|
#endif
|
|
};
|
|
|
|
// A situation can occur when a mouse event occurs over a menu label while the
|
|
// menu popup is already open. The expected behaviour is to close the popup.
|
|
// This happens by calling nsIRollupListener::Rollup before the mouse event is
|
|
// processed. However, in cases where the mouse event is not consumed, this
|
|
// event will then get targeted at the menu label causing the menu to open
|
|
// again. To prevent this, we store in mLastRollup a reference to the popup
|
|
// that was closed during the Rollup call, and prevent this popup from
|
|
// reopening while processing the mouse event.
|
|
// mLastRollup should only be set while an nsAutoRollup is in scope;
|
|
// when it goes out of scope mLastRollup is cleared automatically.
|
|
// As mLastRollup is static, it can be retrieved by calling
|
|
// nsIWidget::GetLastRollup on any widget.
|
|
class nsAutoRollup
|
|
{
|
|
bool wasClear;
|
|
|
|
public:
|
|
|
|
nsAutoRollup();
|
|
~nsAutoRollup();
|
|
};
|
|
|
|
#endif // nsBaseWidget_h__
|