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7cd70b33b4
In nsIWidget, GetBoundsUntyped(), GetClientBoundsUntyped() and GetScreenBoundsUntyped() are currently the primary implementations, and the untyped versions are defined on top of them. This patch flips that around.
596 lines
26 KiB
C++
596 lines
26 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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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::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(mozilla::LayoutDeviceIntRect &aRect) override;
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NS_IMETHOD GetClientBounds(mozilla::LayoutDeviceIntRect &aRect) override;
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NS_IMETHOD GetScreenBounds(mozilla::LayoutDeviceIntRect &aRect) override;
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NS_IMETHOD GetRestoredBounds(mozilla::LayoutDeviceIntRect &aRect) override;
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NS_IMETHOD GetNonClientMargins(
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mozilla::LayoutDeviceIntMargin &margins) override;
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NS_IMETHOD SetNonClientMargins(
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mozilla::LayoutDeviceIntMargin &margins) override;
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virtual nsIntPoint GetClientOffsetUntyped() 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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NS_IMETHOD GetToggledKeyState(uint32_t aKeyCode, bool* aLEDState) override { return NS_ERROR_NOT_IMPLEMENTED; }
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virtual nsIMEUpdatePreference GetIMEUpdatePreference() override { return nsIMEUpdatePreference(); }
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NS_IMETHOD OnDefaultButtonLoaded(const mozilla::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 mozilla::LayoutDeviceIntSize
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ClientToWindowSize(const mozilla::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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nsIntRect 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(mozilla::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(mozilla::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(mozilla::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
|
|
* @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;
|
|
nsIntRect* 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__
|