зеркало из https://github.com/mozilla/gecko-dev.git
239 строки
8.4 KiB
C++
239 строки
8.4 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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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at:
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Code.
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*
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* The Initial Developer of the Original Code is
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* The Mozilla Foundation
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* Portions created by the Initial Developer are Copyright (C) 2010
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Chris Jones <jones.chris.g@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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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 "nsBaseWidget.h"
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#include "nsThreadUtils.h"
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#include "nsWeakReference.h"
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class gfxASurface;
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namespace mozilla {
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namespace widget {
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class PuppetWidget : public nsBaseWidget, public nsSupportsWeakReference
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{
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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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PuppetWidget(PBrowserChild *aTabChild);
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virtual ~PuppetWidget();
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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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EVENT_CALLBACK aHandleEventFunction,
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nsDeviceContext* aContext,
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nsWidgetInitData* aInitData = nsnull);
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virtual already_AddRefed<nsIWidget>
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CreateChild(const nsIntRect &aRect,
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EVENT_CALLBACK aHandleEventFunction,
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nsDeviceContext *aContext,
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nsWidgetInitData *aInitData = nsnull,
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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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NS_IMETHOD IsVisible(bool& aState)
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{ aState = mVisible; return NS_OK; }
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NS_IMETHOD ConstrainPosition(bool /*ignored aAllowSlop*/,
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PRInt32* aX,
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PRInt32* 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(PRInt32 aX, PRInt32 aY)
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{ return NS_OK; }
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NS_IMETHOD Resize(PRInt32 aWidth,
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PRInt32 aHeight,
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bool aRepaint);
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NS_IMETHOD Resize(PRInt32 aX,
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PRInt32 aY,
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PRInt32 aWidth,
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PRInt32 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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NS_IMETHOD IsEnabled(bool *aState)
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{ *aState = mEnabled; return NS_OK; }
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NS_IMETHOD SetFocus(bool aRaise = false);
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// PuppetWidgets don't care about children.
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virtual nsresult ConfigureChildren(const nsTArray<Configuration>& aConfigurations)
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{ return NS_OK; }
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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(PRUint32 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(nsGUIEvent& event, nsIntPoint* aPoint = nsnull);
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NS_IMETHOD DispatchEvent(nsGUIEvent* event, nsEventStatus& aStatus);
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NS_IMETHOD CaptureRollupEvents(nsIRollupListener* aListener,
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bool aDoCapture, bool aConsumeRollupEvent)
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{ return NS_ERROR_UNEXPECTED; }
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//
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// nsBaseWidget methods we override
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//
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//NS_IMETHOD CaptureMouse(bool aCapture);
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virtual LayerManager*
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GetLayerManager(PLayersChild* aShadowManager = nsnull,
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LayersBackend aBackendHint = LayerManager::LAYERS_NONE,
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LayerManagerPersistence aPersistence = LAYER_MANAGER_CURRENT,
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bool* aAllowRetaining = nsnull);
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// virtual nsDeviceContext* GetDeviceContext();
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virtual gfxASurface* GetThebesSurface();
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NS_IMETHOD ResetInputState();
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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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NS_IMETHOD CancelComposition();
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NS_IMETHOD OnIMEFocusChange(bool aFocus);
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NS_IMETHOD OnIMETextChange(PRUint32 aOffset, PRUint32 aEnd,
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PRUint32 aNewEnd);
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NS_IMETHOD OnIMESelectionChange(void);
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NS_IMETHOD SetCursor(nsCursor aCursor);
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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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private:
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nsresult DispatchPaintEvent();
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nsresult DispatchResizeEvent();
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void SetChild(PuppetWidget* aChild);
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nsresult IMEEndComposition(bool aCancel);
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class PaintTask : public nsRunnable {
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public:
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NS_DECL_NSIRUNNABLE
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PaintTask(PuppetWidget* widget) : mWidget(widget) {}
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void Revoke() { mWidget = nsnull; }
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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 reference
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// back to TabChild (e.g. to delegate nsIWidget IME calls to chrome)
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// So we hold a weak reference to TabChild (PBrowserChild) here.
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// Since it's possible for TabChild to outlive the PuppetWidget,
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// we clear this weak reference in Destroy()
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PBrowserChild *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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bool mEnabled;
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bool mVisible;
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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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nsRefPtr<gfxASurface> mSurface;
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// IME
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nsIMEUpdatePreference mIMEPreference;
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bool mIMEComposing;
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// Latest seqno received through events
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PRUint32 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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PRUint32 mIMELastBlurSeqno;
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// The DPI of the screen corresponding to this widget
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float mDPI;
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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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