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tenfourfox/widget/nsBaseWidget.h

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