зеркало из https://github.com/mozilla/gecko-dev.git
100 строки
3.1 KiB
C++
100 строки
3.1 KiB
C++
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "nsCoord.h"
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#include "nsIDOMSelectionListener.h"
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#include "nsICaret.h"
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class nsITimer;
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class nsIView;
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class nsIRenderingContext;
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// {E14B66F6-BFC5-11d2-B57E-00105AA83B2F}
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#define NS_CARET_CID \
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{ 0xe14b66f6, 0xbfc5, 0x11d2, { 0xb5, 0x7e, 0x0, 0x10, 0x5a, 0xa8, 0x3b, 0x2f } };
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//-----------------------------------------------------------------------------
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class nsCaret : public nsICaret,
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public nsIDOMSelectionListener
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{
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public:
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nsCaret();
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virtual ~nsCaret();
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NS_DECL_ISUPPORTS
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public:
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// nsICaret interface
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NS_IMETHOD Init(nsIPresShell *inPresShell);
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NS_IMETHOD SetCaretVisible(PRBool inMakeVisible);
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NS_IMETHOD SetCaretReadOnly(PRBool inMakeReadonly);
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NS_IMETHOD GetWindowRelativeCoordinates(nsPoint& outCoordinates, PRBool& outIsCollapsed);
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NS_IMETHOD ClearFrameRefs(nsIFrame* aFrame);
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//nsIDOMSelectionListener interface
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NS_IMETHOD NotifySelectionChanged();
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static void CaretBlinkCallback(nsITimer *aTimer, void *aClosure);
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protected:
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void KillTimer();
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nsresult PrimeTimer();
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nsresult StartBlinking();
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nsresult StopBlinking();
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enum EViewCoordinates {
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eTopLevelWindowCoordinates,
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eViewCoordinates
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};
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void GetViewForRendering(nsIFrame *caretFrame, EViewCoordinates coordType, nsPoint &viewOffset, nsIView* &outView);
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PRBool SetupDrawingFrameAndOffset();
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PRBool MustDrawCaret();
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void RefreshDrawCaret(nsIView *aView, nsIRenderingContext& inRendContext, const nsRect& aDirtyRect);
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void DrawCaretWithContext(nsIRenderingContext* inRendContext);
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void DrawCaret();
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void ToggleDrawnStatus() { mDrawn = !mDrawn; }
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nsIPresShell *mPresShell; // we rely on the nsEditor to refCount this
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nsITimer* mBlinkTimer;
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PRUint32 mBlinkRate; // time for one cyle (off then on), in milliseconds
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nscoord mCaretWidth; // caret width in twips
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PRBool mVisible; // is the caret blinking
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PRBool mReadOnly; // it the caret in readonly state (draws differently)
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private:
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PRBool mDrawn; // this should be mutable
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nsRect mCaretRect; // the last caret rect
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nsIFrame* mLastCaretFrame; // store the frame the caret was last drawn in.
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PRInt32 mLastContentOffset;
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};
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