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Diffstat (limited to '')
| -rw-r--r-- | widget/PuppetWidget.h | 406 |
1 files changed, 406 insertions, 0 deletions
diff --git a/widget/PuppetWidget.h b/widget/PuppetWidget.h new file mode 100644 index 0000000000..65050bb455 --- /dev/null +++ b/widget/PuppetWidget.h @@ -0,0 +1,406 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: sw=2 ts=8 et : + */ +/* 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/. */ + +/** + * This "puppet widget" isn't really a platform widget. It's intended + * to be used in widgetless rendering contexts, such as sandboxed + * content processes. If any "real" widgetry is needed, the request + * is forwarded to and/or data received from elsewhere. + */ + +#ifndef mozilla_widget_PuppetWidget_h__ +#define mozilla_widget_PuppetWidget_h__ + +#include "mozilla/gfx/2D.h" +#include "mozilla/RefPtr.h" +#include "nsBaseWidget.h" +#include "nsCOMArray.h" +#include "nsThreadUtils.h" +#include "mozilla/Attributes.h" +#include "mozilla/ContentCache.h" +#include "mozilla/EventForwards.h" +#include "mozilla/TextEventDispatcherListener.h" +#include "mozilla/layers/MemoryPressureObserver.h" + +namespace mozilla { +enum class NativeKeyBindingsType : uint8_t; + +namespace dom { +class BrowserChild; +} // namespace dom + +namespace layers { +class WebRenderLayerManager; +} // namespace layers + +namespace widget { + +struct AutoCacheNativeKeyCommands; + +class PuppetWidget : public nsBaseWidget, + public TextEventDispatcherListener, + public layers::MemoryPressureListener { + typedef mozilla::CSSRect CSSRect; + typedef mozilla::dom::BrowserChild BrowserChild; + typedef mozilla::gfx::DrawTarget DrawTarget; + typedef mozilla::layers::WebRenderLayerManager WebRenderLayerManager; + + // Avoiding to make compiler confused between mozilla::widget and nsIWidget. + typedef mozilla::widget::TextEventDispatcher TextEventDispatcher; + typedef mozilla::widget::TextEventDispatcherListener + TextEventDispatcherListener; + + typedef nsBaseWidget Base; + + // The width and height of the "widget" are clamped to this. + public: + explicit PuppetWidget(BrowserChild* aBrowserChild); + + protected: + virtual ~PuppetWidget(); + + public: + NS_DECL_ISUPPORTS_INHERITED + + // PuppetWidget creation is infallible, hence InfallibleCreate(), which + // Create() calls. + using nsBaseWidget::Create; // for Create signature not overridden here + virtual nsresult Create(nsIWidget* aParent, nsNativeWidget aNativeParent, + const LayoutDeviceIntRect& aRect, + widget::InitData* aInitData = nullptr) override; + void InfallibleCreate(nsIWidget* aParent, nsNativeWidget aNativeParent, + const LayoutDeviceIntRect& aRect, + widget::InitData* aInitData = nullptr); + + void InitIMEState(); + + virtual already_AddRefed<nsIWidget> CreateChild( + const LayoutDeviceIntRect& aRect, widget::InitData* aInitData = nullptr, + bool aForceUseIWidgetParent = false) override; + + virtual void Destroy() override; + + virtual void Show(bool aState) override; + + virtual bool IsVisible() const override { return mVisible; } + + // Widget position is controlled by the parent process via BrowserChild. + virtual void Move(double aX, double aY) override {} + + virtual void Resize(double aWidth, double aHeight, bool aRepaint) override; + virtual void Resize(double aX, double aY, double aWidth, double aHeight, + bool aRepaint) override { + if (!mBounds.IsEqualXY(aX, aY)) { + NotifyWindowMoved(aX, aY); + } + mBounds.MoveTo(aX, aY); + return Resize(aWidth, aHeight, aRepaint); + } + + // XXX/cjones: copying gtk behavior here; unclear what disabling a + // widget is supposed to entail + virtual void Enable(bool aState) override { mEnabled = aState; } + virtual bool IsEnabled() const override { return mEnabled; } + + virtual nsSizeMode SizeMode() override { return mSizeMode; } + virtual void SetSizeMode(nsSizeMode aMode) override { mSizeMode = aMode; } + + virtual void SetFocus(Raise, mozilla::dom::CallerType aCallerType) override; + + virtual void Invalidate(const LayoutDeviceIntRect& aRect) override; + + // PuppetWidgets don't have native data, as they're purely nonnative. + virtual void* GetNativeData(uint32_t aDataType) override { return nullptr; } + + // PuppetWidgets don't have any concept of titles. + virtual nsresult SetTitle(const nsAString& aTitle) override { + return NS_ERROR_UNEXPECTED; + } + + virtual mozilla::LayoutDeviceToLayoutDeviceMatrix4x4 + WidgetToTopLevelWidgetTransform() override; + + virtual LayoutDeviceIntPoint WidgetToScreenOffset() override; + + virtual LayoutDeviceIntPoint TopLevelWidgetToScreenOffset() override { + return GetWindowPosition(); + } + + int32_t RoundsWidgetCoordinatesTo() override { return mRounding; } + + void InitEvent(WidgetGUIEvent& aEvent, + LayoutDeviceIntPoint* aPoint = nullptr); + + virtual nsresult DispatchEvent(WidgetGUIEvent* aEvent, + nsEventStatus& aStatus) override; + ContentAndAPZEventStatus DispatchInputEvent( + WidgetInputEvent* aEvent) override; + void SetConfirmedTargetAPZC( + uint64_t aInputBlockId, + const nsTArray<ScrollableLayerGuid>& aTargets) const override; + void UpdateZoomConstraints( + const uint32_t& aPresShellId, const ScrollableLayerGuid::ViewID& aViewId, + const mozilla::Maybe<ZoomConstraints>& aConstraints) override; + bool AsyncPanZoomEnabled() const override; + + MOZ_CAN_RUN_SCRIPT virtual bool GetEditCommands( + NativeKeyBindingsType aType, const mozilla::WidgetKeyboardEvent& aEvent, + nsTArray<mozilla::CommandInt>& aCommands) override; + + friend struct AutoCacheNativeKeyCommands; + + // + // nsBaseWidget methods we override + // + + // Documents loaded in child processes are always subdocuments of + // other docs in an ancestor process. To ensure that the + // backgrounds of those documents are painted like those of + // same-process subdocuments, we force the widget here to be + // transparent, which in turn will cause layout to use a transparent + // backstop background color. + virtual TransparencyMode GetTransparencyMode() override { + return TransparencyMode::Transparent; + } + + virtual WindowRenderer* GetWindowRenderer() override; + + // This is used for creating remote layer managers and for re-creating + // them after a compositor reset. The lambda aInitializeFunc is used to + // perform any caller-required initialization for the newly created layer + // manager; in the event of a failure, return false and it will destroy the + // new layer manager without changing the state of the widget. + bool CreateRemoteLayerManager( + const std::function<bool(WebRenderLayerManager*)>& aInitializeFunc); + + virtual void SetInputContext(const InputContext& aContext, + const InputContextAction& aAction) override; + virtual InputContext GetInputContext() override; + virtual NativeIMEContext GetNativeIMEContext() override; + TextEventDispatcherListener* GetNativeTextEventDispatcherListener() override { + return mNativeTextEventDispatcherListener + ? mNativeTextEventDispatcherListener.get() + : this; + } + void SetNativeTextEventDispatcherListener( + TextEventDispatcherListener* aListener) { + mNativeTextEventDispatcherListener = aListener; + } + + virtual void SetCursor(const Cursor&) override; + + float GetDPI() override { return mDPI; } + double GetDefaultScaleInternal() override { return mDefaultScale; } + + virtual bool NeedsPaint() override; + + // Paint the widget immediately if any paints are queued up. + void PaintNowIfNeeded(); + + virtual BrowserChild* GetOwningBrowserChild() override { + return mBrowserChild; + } + + void UpdateBackingScaleCache(float aDpi, int32_t aRounding, double aScale) { + mDPI = aDpi; + mRounding = aRounding; + mDefaultScale = aScale; + } + + // safe area insets support + virtual ScreenIntMargin GetSafeAreaInsets() const override; + void UpdateSafeAreaInsets(const ScreenIntMargin& aSafeAreaInsets); + + // Get the offset to the chrome of the window that this tab belongs to. + // + // NOTE: In OOP iframes this value is zero. You should use + // WidgetToTopLevelWidgetTransform instead which is already including the + // chrome offset. + LayoutDeviceIntPoint GetChromeOffset(); + + // Get the screen position of the application window. + LayoutDeviceIntPoint GetWindowPosition(); + + virtual LayoutDeviceIntRect GetScreenBounds() override; + + virtual nsresult SynthesizeNativeKeyEvent( + int32_t aNativeKeyboardLayout, int32_t aNativeKeyCode, + uint32_t aModifierFlags, const nsAString& aCharacters, + const nsAString& aUnmodifiedCharacters, nsIObserver* aObserver) override; + virtual nsresult SynthesizeNativeMouseEvent( + LayoutDeviceIntPoint aPoint, NativeMouseMessage aNativeMessage, + MouseButton aButton, nsIWidget::Modifiers aModifierFlags, + nsIObserver* aObserver) override; + virtual nsresult SynthesizeNativeMouseMove(LayoutDeviceIntPoint aPoint, + nsIObserver* aObserver) override; + virtual nsresult SynthesizeNativeMouseScrollEvent( + LayoutDeviceIntPoint aPoint, uint32_t aNativeMessage, double aDeltaX, + double aDeltaY, double aDeltaZ, uint32_t aModifierFlags, + uint32_t aAdditionalFlags, nsIObserver* aObserver) override; + virtual nsresult SynthesizeNativeTouchPoint(uint32_t aPointerId, + TouchPointerState aPointerState, + LayoutDeviceIntPoint aPoint, + double aPointerPressure, + uint32_t aPointerOrientation, + nsIObserver* aObserver) override; + virtual nsresult SynthesizeNativeTouchPadPinch( + TouchpadGesturePhase aEventPhase, float aScale, + LayoutDeviceIntPoint aPoint, int32_t aModifierFlags) override; + virtual nsresult SynthesizeNativeTouchTap(LayoutDeviceIntPoint aPoint, + bool aLongTap, + nsIObserver* aObserver) override; + virtual nsresult ClearNativeTouchSequence(nsIObserver* aObserver) override; + virtual uint32_t GetMaxTouchPoints() const override; + virtual nsresult SynthesizeNativePenInput(uint32_t aPointerId, + TouchPointerState aPointerState, + LayoutDeviceIntPoint aPoint, + double aPressure, + uint32_t aRotation, int32_t aTiltX, + int32_t aTiltY, int32_t aButton, + nsIObserver* aObserver) override; + + virtual nsresult SynthesizeNativeTouchpadDoubleTap( + LayoutDeviceIntPoint aPoint, uint32_t aModifierFlags) override; + + virtual nsresult SynthesizeNativeTouchpadPan(TouchpadGesturePhase aEventPhase, + LayoutDeviceIntPoint aPoint, + double aDeltaX, double aDeltaY, + int32_t aModifierFlags, + nsIObserver* aObserver) override; + + virtual void LockNativePointer() override; + virtual void UnlockNativePointer() override; + + virtual void StartAsyncScrollbarDrag( + const AsyncDragMetrics& aDragMetrics) override; + + virtual void ZoomToRect(const uint32_t& aPresShellId, + const ScrollableLayerGuid::ViewID& aViewId, + const CSSRect& aRect, + const uint32_t& aFlags) override; + + virtual bool HasPendingInputEvent() override; + + virtual void LookUpDictionary( + const nsAString& aText, + const nsTArray<mozilla::FontRange>& aFontRangeArray, + const bool aIsVertical, const LayoutDeviceIntPoint& aPoint) override; + + nsresult SetSystemFont(const nsCString& aFontName) override; + nsresult GetSystemFont(nsCString& aFontName) override; + + // TextEventDispatcherListener + using nsBaseWidget::NotifyIME; + NS_IMETHOD NotifyIME(TextEventDispatcher* aTextEventDispatcher, + const IMENotification& aNotification) override; + NS_IMETHOD_(IMENotificationRequests) GetIMENotificationRequests() override; + NS_IMETHOD_(void) + OnRemovedFrom(TextEventDispatcher* aTextEventDispatcher) override; + NS_IMETHOD_(void) + WillDispatchKeyboardEvent(TextEventDispatcher* aTextEventDispatcher, + WidgetKeyboardEvent& aKeyboardEvent, + uint32_t aIndexOfKeypress, void* aData) override; + + virtual void OnMemoryPressure(layers::MemoryPressureReason aWhy) override; + + private: + void Paint(); + + void SetChild(PuppetWidget* aChild); + + nsresult RequestIMEToCommitComposition(bool aCancel); + nsresult NotifyIMEOfFocusChange(const IMENotification& aIMENotification); + nsresult NotifyIMEOfSelectionChange(const IMENotification& aIMENotification); + nsresult NotifyIMEOfCompositionUpdate( + const IMENotification& aIMENotification); + nsresult NotifyIMEOfTextChange(const IMENotification& aIMENotification); + nsresult NotifyIMEOfMouseButtonEvent(const IMENotification& aIMENotification); + nsresult NotifyIMEOfPositionChange(const IMENotification& aIMENotification); + + bool CacheEditorRect(); + bool CacheCompositionRects(uint32_t& aStartOffset, + nsTArray<LayoutDeviceIntRect>& aRectArray, + uint32_t& aTargetCauseOffset); + bool GetCaretRect(LayoutDeviceIntRect& aCaretRect, uint32_t aCaretOffset); + uint32_t GetCaretOffset(); + + nsIWidgetListener* GetCurrentWidgetListener(); + + // When this widget caches input context and currently managed by + // IMEStateManager, the cache is valid. + bool HaveValidInputContextCache() const; + + class WidgetPaintTask : public Runnable { + public: + NS_DECL_NSIRUNNABLE + explicit WidgetPaintTask(PuppetWidget* widget) + : Runnable("PuppetWidget::WidgetPaintTask"), mWidget(widget) {} + void Revoke() { mWidget = nullptr; } + + private: + PuppetWidget* mWidget; + }; + + nsRefreshDriver* GetTopLevelRefreshDriver() const; + + // BrowserChild normally holds a strong reference to this PuppetWidget + // or its root ancestor, but each PuppetWidget also needs a + // reference back to BrowserChild (e.g. to delegate nsIWidget IME calls + // to chrome) So we hold a weak reference to BrowserChild here. Since + // it's possible for BrowserChild to outlive the PuppetWidget, we clear + // this weak reference in Destroy() + BrowserChild* mBrowserChild; + // The "widget" to which we delegate events if we don't have an + // event handler. + RefPtr<PuppetWidget> mChild; + nsRevocableEventPtr<WidgetPaintTask> mWidgetPaintTask; + RefPtr<layers::MemoryPressureObserver> mMemoryPressureObserver; + // XXX/cjones: keeping this around until we teach LayerManager to do + // retained-content-only transactions + RefPtr<DrawTarget> mDrawTarget; + // IME + IMENotificationRequests mIMENotificationRequestsOfParent; + InputContext mInputContext; + // mNativeIMEContext is initialized when this dispatches every composition + // event both from parent process's widget and TextEventDispatcher in same + // process. If it hasn't been started composition yet, this isn't necessary + // for XP code since there is no TextComposition instance which is caused by + // the PuppetWidget instance. + NativeIMEContext mNativeIMEContext; + ContentCacheInChild mContentCache; + + // The DPI of the parent widget containing this widget. + float mDPI = GetFallbackDPI(); + int32_t mRounding = 1; + double mDefaultScale = GetFallbackDefaultScale().scale; + + ScreenIntMargin mSafeAreaInsets; + + RefPtr<TextEventDispatcherListener> mNativeTextEventDispatcherListener; + + protected: + bool mEnabled; + bool mVisible; + + private: + nsSizeMode mSizeMode; + + bool mNeedIMEStateInit; + // When remote process requests to commit/cancel a composition, the + // composition may have already been committed in the main process. In such + // case, this will receive remaining composition events for the old + // composition even after requesting to commit/cancel the old composition + // but the TextComposition for the old composition has already been + // destroyed. So, until this meets new eCompositionStart, following + // composition events should be ignored if this is set to true. + bool mIgnoreCompositionEvents; +}; + +} // namespace widget +} // namespace mozilla + +#endif // mozilla_widget_PuppetWidget_h__ |