pjs/layout/base/nsCaret.h

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