зеркало из https://github.com/mozilla/gecko-dev.git
337 строки
11 KiB
C++
337 строки
11 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: sw=2 ts=8 et :
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*/
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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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/**
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* This "puppet widget" isn't really a platform widget. It's intended
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* to be used in widgetless rendering contexts, such as sandboxed
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* content processes. If any "real" widgetry is needed, the request
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* is forwarded to and/or data received from elsewhere.
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*/
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#ifndef mozilla_widget_PuppetWidget_h__
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#define mozilla_widget_PuppetWidget_h__
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#include "mozilla/gfx/2D.h"
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#include "mozilla/RefPtr.h"
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#include "nsBaseScreen.h"
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#include "nsBaseWidget.h"
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#include "nsIScreenManager.h"
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#include "nsThreadUtils.h"
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#include "nsWeakReference.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/EventForwards.h"
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class gfxASurface;
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namespace mozilla {
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namespace dom {
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class TabChild;
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}
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namespace widget {
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struct AutoCacheNativeKeyCommands;
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class PuppetWidget : public nsBaseWidget,
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public nsSupportsWeakReference
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{
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typedef mozilla::dom::TabChild TabChild;
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typedef mozilla::gfx::DrawTarget DrawTarget;
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typedef nsBaseWidget Base;
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// The width and height of the "widget" are clamped to this.
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static const size_t kMaxDimension;
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public:
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explicit PuppetWidget(TabChild* aTabChild);
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protected:
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virtual ~PuppetWidget();
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public:
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NS_DECL_ISUPPORTS_INHERITED
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NS_IMETHOD Create(nsIWidget* aParent,
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nsNativeWidget aNativeParent,
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const nsIntRect& aRect,
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nsDeviceContext* aContext,
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nsWidgetInitData* aInitData = nullptr);
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void InitIMEState();
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virtual already_AddRefed<nsIWidget>
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CreateChild(const nsIntRect &aRect,
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nsDeviceContext *aContext,
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nsWidgetInitData *aInitData = nullptr,
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bool aForceUseIWidgetParent = false);
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NS_IMETHOD Destroy();
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NS_IMETHOD Show(bool aState);
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virtual bool IsVisible() const
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{ return mVisible; }
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NS_IMETHOD ConstrainPosition(bool /*ignored aAllowSlop*/,
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int32_t* aX,
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int32_t* aY)
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{ *aX = kMaxDimension; *aY = kMaxDimension; return NS_OK; }
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// We're always at <0, 0>, and so ignore move requests.
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NS_IMETHOD Move(double aX, double aY)
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{ return NS_OK; }
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NS_IMETHOD Resize(double aWidth,
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double aHeight,
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bool aRepaint);
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NS_IMETHOD Resize(double aX,
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double aY,
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double aWidth,
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double aHeight,
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bool aRepaint)
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// (we're always at <0, 0>)
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{ return Resize(aWidth, aHeight, aRepaint); }
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// XXX/cjones: copying gtk behavior here; unclear what disabling a
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// widget is supposed to entail
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NS_IMETHOD Enable(bool aState)
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{ mEnabled = aState; return NS_OK; }
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virtual bool IsEnabled() const
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{ return mEnabled; }
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NS_IMETHOD SetFocus(bool aRaise = false);
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virtual nsresult ConfigureChildren(const nsTArray<Configuration>& aConfigurations);
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NS_IMETHOD Invalidate(const nsIntRect& aRect);
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// This API is going away, steer clear.
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virtual void Scroll(const nsIntPoint& aDelta,
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const nsTArray<nsIntRect>& aDestRects,
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const nsTArray<Configuration>& aReconfigureChildren)
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{ /* dead man walking */ }
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// PuppetWidgets don't have native data, as they're purely nonnative.
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virtual void* GetNativeData(uint32_t aDataType);
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NS_IMETHOD ReparentNativeWidget(nsIWidget* aNewParent)
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{ return NS_ERROR_UNEXPECTED; }
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// PuppetWidgets don't have any concept of titles.
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NS_IMETHOD SetTitle(const nsAString& aTitle)
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{ return NS_ERROR_UNEXPECTED; }
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// PuppetWidgets are always at <0, 0>.
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virtual nsIntPoint WidgetToScreenOffset()
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{ return nsIntPoint(0, 0); }
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void InitEvent(WidgetGUIEvent& aEvent, nsIntPoint* aPoint = nullptr);
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NS_IMETHOD DispatchEvent(WidgetGUIEvent* aEvent, nsEventStatus& aStatus);
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NS_IMETHOD CaptureRollupEvents(nsIRollupListener* aListener,
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bool aDoCapture)
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{ return NS_ERROR_UNEXPECTED; }
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NS_IMETHOD_(bool)
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ExecuteNativeKeyBinding(NativeKeyBindingsType aType,
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const mozilla::WidgetKeyboardEvent& aEvent,
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DoCommandCallback aCallback,
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void* aCallbackData) MOZ_OVERRIDE;
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friend struct AutoCacheNativeKeyCommands;
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//
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// nsBaseWidget methods we override
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//
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// Documents loaded in child processes are always subdocuments of
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// other docs in an ancestor process. To ensure that the
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// backgrounds of those documents are painted like those of
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// same-process subdocuments, we force the widget here to be
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// transparent, which in turn will cause layout to use a transparent
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// backstop background color.
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virtual nsTransparencyMode GetTransparencyMode() MOZ_OVERRIDE
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{ return eTransparencyTransparent; }
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virtual LayerManager*
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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);
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NS_IMETHOD NotifyIME(const IMENotification& aIMENotification) MOZ_OVERRIDE;
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NS_IMETHOD_(void) SetInputContext(const InputContext& aContext,
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const InputContextAction& aAction);
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NS_IMETHOD_(InputContext) GetInputContext();
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virtual nsIMEUpdatePreference GetIMEUpdatePreference() MOZ_OVERRIDE;
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NS_IMETHOD SetCursor(nsCursor aCursor);
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NS_IMETHOD SetCursor(imgIContainer* aCursor,
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uint32_t aHotspotX, uint32_t aHotspotY)
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{
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return nsBaseWidget::SetCursor(aCursor, aHotspotX, aHotspotY);
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}
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// Gets the DPI of the screen corresponding to this widget.
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// Contacts the parent process which gets the DPI from the
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// proper widget there. TODO: Handle DPI changes that happen
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// later on.
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virtual float GetDPI();
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virtual double GetDefaultScaleInternal();
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virtual bool NeedsPaint() MOZ_OVERRIDE;
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virtual TabChild* GetOwningTabChild() MOZ_OVERRIDE { return mTabChild; }
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virtual void ClearBackingScaleCache()
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{
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mDPI = -1;
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mDefaultScale = -1;
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}
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protected:
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bool mEnabled;
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bool mVisible;
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private:
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nsresult Paint();
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void SetChild(PuppetWidget* aChild);
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nsresult IMEEndComposition(bool aCancel);
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nsresult NotifyIMEOfFocusChange(bool aFocus);
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nsresult NotifyIMEOfSelectionChange(const IMENotification& aIMENotification);
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nsresult NotifyIMEOfUpdateComposition();
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nsresult NotifyIMEOfTextChange(const IMENotification& aIMENotification);
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nsresult NotifyIMEOfMouseButtonEvent(const IMENotification& aIMENotification);
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class PaintTask : public nsRunnable {
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public:
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NS_DECL_NSIRUNNABLE
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explicit PaintTask(PuppetWidget* widget) : mWidget(widget) {}
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void Revoke() { mWidget = nullptr; }
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private:
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PuppetWidget* mWidget;
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};
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// TabChild normally holds a strong reference to this PuppetWidget
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// or its root ancestor, but each PuppetWidget also needs a
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// reference back to TabChild (e.g. to delegate nsIWidget IME calls
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// to chrome) So we hold a weak reference to TabChild here. Since
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// it's possible for TabChild to outlive the PuppetWidget, we clear
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// this weak reference in Destroy()
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TabChild* mTabChild;
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// The "widget" to which we delegate events if we don't have an
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// event handler.
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nsRefPtr<PuppetWidget> mChild;
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nsIntRegion mDirtyRegion;
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nsRevocableEventPtr<PaintTask> mPaintTask;
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// XXX/cjones: keeping this around until we teach LayerManager to do
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// retained-content-only transactions
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mozilla::RefPtr<DrawTarget> mDrawTarget;
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// IME
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nsIMEUpdatePreference mIMEPreferenceOfParent;
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bool mIMEComposing;
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// Latest seqno received through events
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uint32_t mIMELastReceivedSeqno;
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// Chrome's seqno value when last blur occurred
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// arriving events with seqno up to this should be discarded
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// Note that if seqno overflows (~50 days at 1 ms increment rate),
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// events will be discarded until new focus/blur occurs
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uint32_t mIMELastBlurSeqno;
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bool mNeedIMEStateInit;
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// The DPI of the screen corresponding to this widget
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float mDPI;
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double mDefaultScale;
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// Precomputed answers for ExecuteNativeKeyBinding
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bool mNativeKeyCommandsValid;
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InfallibleTArray<mozilla::CommandInt> mSingleLineCommands;
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InfallibleTArray<mozilla::CommandInt> mMultiLineCommands;
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InfallibleTArray<mozilla::CommandInt> mRichTextCommands;
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};
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struct AutoCacheNativeKeyCommands
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{
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explicit AutoCacheNativeKeyCommands(PuppetWidget* aWidget)
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: mWidget(aWidget)
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{
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mSavedValid = mWidget->mNativeKeyCommandsValid;
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mSavedSingleLine = mWidget->mSingleLineCommands;
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mSavedMultiLine = mWidget->mMultiLineCommands;
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mSavedRichText = mWidget->mRichTextCommands;
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}
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void Cache(const InfallibleTArray<mozilla::CommandInt>& aSingleLineCommands,
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const InfallibleTArray<mozilla::CommandInt>& aMultiLineCommands,
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const InfallibleTArray<mozilla::CommandInt>& aRichTextCommands)
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{
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mWidget->mNativeKeyCommandsValid = true;
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mWidget->mSingleLineCommands = aSingleLineCommands;
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mWidget->mMultiLineCommands = aMultiLineCommands;
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mWidget->mRichTextCommands = aRichTextCommands;
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}
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void CacheNoCommands()
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{
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mWidget->mNativeKeyCommandsValid = true;
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mWidget->mSingleLineCommands.Clear();
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mWidget->mMultiLineCommands.Clear();
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mWidget->mRichTextCommands.Clear();
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}
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~AutoCacheNativeKeyCommands()
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{
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mWidget->mNativeKeyCommandsValid = mSavedValid;
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mWidget->mSingleLineCommands = mSavedSingleLine;
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mWidget->mMultiLineCommands = mSavedMultiLine;
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mWidget->mRichTextCommands = mSavedRichText;
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}
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private:
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PuppetWidget* mWidget;
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bool mSavedValid;
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InfallibleTArray<mozilla::CommandInt> mSavedSingleLine;
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InfallibleTArray<mozilla::CommandInt> mSavedMultiLine;
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InfallibleTArray<mozilla::CommandInt> mSavedRichText;
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};
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class PuppetScreen : public nsBaseScreen
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{
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public:
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explicit PuppetScreen(void* nativeScreen);
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~PuppetScreen();
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NS_IMETHOD GetId(uint32_t* aId) MOZ_OVERRIDE;
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NS_IMETHOD GetRect(int32_t* aLeft, int32_t* aTop, int32_t* aWidth, int32_t* aHeight) MOZ_OVERRIDE;
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NS_IMETHOD GetAvailRect(int32_t* aLeft, int32_t* aTop, int32_t* aWidth, int32_t* aHeight) MOZ_OVERRIDE;
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NS_IMETHOD GetPixelDepth(int32_t* aPixelDepth) MOZ_OVERRIDE;
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NS_IMETHOD GetColorDepth(int32_t* aColorDepth) MOZ_OVERRIDE;
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NS_IMETHOD GetRotation(uint32_t* aRotation) MOZ_OVERRIDE;
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NS_IMETHOD SetRotation(uint32_t aRotation) MOZ_OVERRIDE;
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};
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class PuppetScreenManager MOZ_FINAL : public nsIScreenManager
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{
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~PuppetScreenManager();
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public:
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PuppetScreenManager();
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NS_DECL_ISUPPORTS
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NS_DECL_NSISCREENMANAGER
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protected:
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nsCOMPtr<nsIScreen> mOneScreen;
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};
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} // namespace widget
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} // namespace mozilla
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#endif // mozilla_widget_PuppetWidget_h__
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