зеркало из https://github.com/mozilla/gecko-dev.git
133 строки
5.3 KiB
C++
133 строки
5.3 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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* ***** 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.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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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 of the GNU General Public License Version 2 or later (the "GPL"),
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* or 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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#include "nsCoord.h"
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#include "nsISelectionListener.h"
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#include "nsIRenderingContext.h"
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#include "nsITimer.h"
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#include "nsICaret.h"
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#include "nsWeakPtr.h"
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#ifdef IBMBIDI
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#include "nsIBidiKeyboard.h"
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#endif
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class nsIView;
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//-----------------------------------------------------------------------------
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class nsCaret : public nsICaret,
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public nsISelectionListener
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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 Terminate();
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NS_IMETHOD GetCaretDOMSelection(nsISelection **outDOMSel);
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NS_IMETHOD SetCaretDOMSelection(nsISelection *inDOMSel);
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NS_IMETHOD GetCaretVisible(PRBool *outMakeVisible);
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NS_IMETHOD SetCaretVisible(PRBool intMakeVisible);
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NS_IMETHOD SetCaretReadOnly(PRBool inMakeReadonly);
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NS_IMETHOD GetCaretCoordinates(EViewCoordinates aRelativeToType, nsISelection *inDOMSel, nsRect* outCoordinates, PRBool* outIsCollapsed, nsIView **outView);
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NS_IMETHOD ClearFrameRefs(nsIFrame* aFrame);
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NS_IMETHOD EraseCaret();
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NS_IMETHOD SetCaretWidth(nscoord aPixels);
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NS_IMETHOD SetVisibilityDuringSelection(PRBool aVisibility);
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NS_IMETHOD DrawAtPosition(nsIDOMNode* aNode, PRInt32 aOffset);
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//nsISelectionListener interface
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NS_IMETHOD NotifySelectionChanged(nsIDOMDocument *aDoc, nsISelection *aSel, short aReason);
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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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void GetViewForRendering(nsIFrame *caretFrame, EViewCoordinates coordType, nsPoint &viewOffset, nsRect& outClipRect, nsIView **outRenderingView, nsIView **outRelativeView);
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PRBool SetupDrawingFrameAndOffset(nsIDOMNode* aNode, PRInt32 aOffset, nsIFrameSelection::HINT aFrameHint);
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PRBool MustDrawCaret();
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void DrawCaret();
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void GetCaretRectAndInvert();
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void ToggleDrawnStatus() { mDrawn = !mDrawn; }
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protected:
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nsWeakPtr mPresShell;
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nsWeakPtr mDomSelectionWeak;
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nsCOMPtr<nsITimer> mBlinkTimer;
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nsCOMPtr<nsIRenderingContext> mRendContext;
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PRUint32 mBlinkRate; // time for one cyle (off then on), in milliseconds
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nscoord mCaretTwipsWidth; // caret width in twips. this gets calculated laziiy
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nscoord mCaretPixelsWidth; // caret width in pixels
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PRPackedBool mVisible; // is the caret blinking
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PRPackedBool mDrawn; // this should be mutable
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PRPackedBool mReadOnly; // it the caret in readonly state (draws differently)
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PRPackedBool mShowDuringSelection; // show when text is selected
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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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nsIView* mLastCaretView; // last view that we used for drawing. Cached so we can tell when we need to make a new RC
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PRInt32 mLastContentOffset;
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#ifdef IBMBIDI
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nsRect mHookRect; // directional hook on the caret
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nsCOMPtr<nsIBidiKeyboard> mBidiKeyboard; // Bidi keyboard object to set and query keyboard language
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PRPackedBool mKeyboardRTL; // is the keyboard language right-to-left
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#endif
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};
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