gecko/layout/base/nsCaret.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=2 sw=2 et tw=78:
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/* the caret is the text cursor used, e.g., when editing */
#include "nsCoord.h"
#include "nsISelectionListener.h"
#include "nsIRenderingContext.h"
#include "nsITimer.h"
#include "nsICaret.h"
#include "nsWeakPtr.h"
class nsIView;
//-----------------------------------------------------------------------------
class nsCaret : public nsICaret,
public nsISelectionListener
{
public:
nsCaret();
virtual ~nsCaret();
NS_DECL_ISUPPORTS
public:
// nsICaret interface
NS_IMETHOD Init(nsIPresShell *inPresShell);
NS_IMETHOD Terminate();
NS_IMETHOD GetCaretDOMSelection(nsISelection **outDOMSel);
NS_IMETHOD SetCaretDOMSelection(nsISelection *inDOMSel);
NS_IMETHOD GetCaretVisible(PRBool *outMakeVisible);
NS_IMETHOD SetCaretVisible(PRBool intMakeVisible);
NS_IMETHOD SetCaretReadOnly(PRBool inMakeReadonly);
virtual PRBool GetCaretReadOnly()
{
return mReadOnly;
}
NS_IMETHOD GetCaretCoordinates(EViewCoordinates aRelativeToType,
nsISelection *inDOMSel,
nsRect* outCoordinates,
PRBool* outIsCollapsed,
nsIView **outView);
NS_IMETHOD EraseCaret();
NS_IMETHOD SetVisibilityDuringSelection(PRBool aVisibility);
NS_IMETHOD DrawAtPosition(nsIDOMNode* aNode, PRInt32 aOffset);
nsIFrame* GetCaretFrame();
nsRect GetCaretRect()
{
nsRect r;
r.UnionRect(mCaretRect, GetHookRect());
return r;
}
nsIContent* GetCaretContent()
{
if (mDrawn)
return mLastContent;
return nsnull;
}
void InvalidateOutsideCaret();
void UpdateCaretPosition();
void PaintCaret(nsDisplayListBuilder *aBuilder,
nsIRenderingContext *aCtx,
const nsPoint &aOffset,
nscolor aColor);
//nsISelectionListener interface
NS_DECL_NSISELECTIONLISTENER
static void CaretBlinkCallback(nsITimer *aTimer, void *aClosure);
NS_IMETHOD GetCaretFrameForNodeOffset(nsIContent* aContentNode,
PRInt32 aOffset,
nsFrameSelection::HINT aFrameHint,
PRUint8 aBidiLevel,
nsIFrame** aReturnFrame,
PRInt32* aReturnOffset);
protected:
void KillTimer();
nsresult PrimeTimer();
nsresult StartBlinking();
nsresult StopBlinking();
void GetViewForRendering(nsIFrame *caretFrame,
EViewCoordinates coordType,
nsPoint &viewOffset,
nsIView **outRenderingView,
nsIView **outRelativeView);
PRBool DrawAtPositionWithHint(nsIDOMNode* aNode,
PRInt32 aOffset,
nsFrameSelection::HINT aFrameHint,
PRUint8 aBidiLevel,
PRBool aInvalidate);
PRBool MustDrawCaret();
void DrawCaret(PRBool aInvalidate);
void DrawCaretAfterBriefDelay();
nsresult UpdateCaretRects(nsIFrame* aFrame, PRInt32 aFrameOffset);
nsresult UpdateHookRect(nsPresContext* aPresContext);
static void InvalidateRects(const nsRect &aRect, const nsRect &aHook,
nsIFrame *aFrame);
nsRect GetHookRect()
{
#ifdef IBMBIDI
return mHookRect;
#else
return nsRect();
#endif
}
void ToggleDrawnStatus() { mDrawn = !mDrawn; }
nsFrameSelection* GetFrameSelection();
protected:
nsWeakPtr mPresShell;
nsWeakPtr mDomSelectionWeak;
nsCOMPtr<nsITimer> mBlinkTimer;
nsCOMPtr<nsIRenderingContext> mRendContext;
PRUint32 mBlinkRate; // time for one cyle (off then on), in milliseconds
nscoord mCaretWidth; // caret width. this gets calculated laziiy
nscoord mBidiIndicatorSize; // width and height of bidi indicator
PRPackedBool mVisible; // is the caret blinking
PRPackedBool mDrawn; // this should be mutable
PRPackedBool mReadOnly; // it the caret in readonly state (draws differently)
PRPackedBool mShowDuringSelection; // show when text is selected
nsRect mCaretRect; // the last caret rect, in the coodinates of the last frame.
nsCOMPtr<nsIContent> mLastContent; // store the content the caret was last requested to be drawn
// in (by DrawAtPosition()/DrawCaret()),
// note that this can be different than where it was
// actually drawn (anon <BR> in text control)
PRInt32 mLastContentOffset; // the offset for the last request
nsFrameSelection::HINT mLastHint; // the hint associated with the last request, see also
// mLastBidiLevel below
#ifdef IBMBIDI
nsRect mHookRect; // directional hook on the caret
PRUint8 mLastBidiLevel; // saved bidi level of the last draw request, to use when we erase
PRPackedBool mKeyboardRTL; // is the keyboard language right-to-left
#endif
};