зеркало из https://github.com/mozilla/pjs.git
227 строки
8.9 KiB
C++
227 строки
8.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: set ts=2 sw=2 et tw=78:
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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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/* the caret is the text cursor used, e.g., when editing */
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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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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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virtual PRBool GetCaretReadOnly()
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{
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return mReadOnly;
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}
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NS_IMETHOD GetCaretCoordinates(EViewCoordinates aRelativeToType,
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nsISelection *inDOMSel,
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nsRect* outCoordinates,
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PRBool* outIsCollapsed,
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nsIView **outView);
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NS_IMETHOD EraseCaret();
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NS_IMETHOD SetVisibilityDuringSelection(PRBool aVisibility);
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NS_IMETHOD DrawAtPosition(nsIDOMNode* aNode, PRInt32 aOffset);
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nsIFrame* GetCaretFrame();
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nsRect GetCaretRect()
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{
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nsRect r;
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r.UnionRect(mCaretRect, GetHookRect());
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return r;
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}
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nsIContent* GetCaretContent()
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{
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if (mDrawn)
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return mLastContent;
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return nsnull;
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}
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void InvalidateOutsideCaret();
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void UpdateCaretPosition();
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void PaintCaret(nsDisplayListBuilder *aBuilder,
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nsIRenderingContext *aCtx,
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const nsPoint &aOffset,
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nscolor aColor);
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void SetIgnoreUserModify(PRBool aIgnoreUserModify);
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//nsISelectionListener interface
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NS_DECL_NSISELECTIONLISTENER
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static void CaretBlinkCallback(nsITimer *aTimer, void *aClosure);
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NS_IMETHOD GetCaretFrameForNodeOffset(nsIContent* aContentNode,
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PRInt32 aOffset,
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nsFrameSelection::HINT aFrameHint,
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PRUint8 aBidiLevel,
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nsIFrame** aReturnFrame,
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PRInt32* aReturnOffset);
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NS_IMETHOD CheckCaretDrawingState();
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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,
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EViewCoordinates coordType,
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nsPoint &viewOffset,
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nsIView **outRenderingView,
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nsIView **outRelativeView);
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PRBool DrawAtPositionWithHint(nsIDOMNode* aNode,
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PRInt32 aOffset,
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nsFrameSelection::HINT aFrameHint,
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PRUint8 aBidiLevel,
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PRBool aInvalidate);
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struct Metrics {
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nscoord mBidiIndicatorSize; // width and height of bidi indicator
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nscoord mCaretWidth; // full caret width including bidi indicator
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};
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Metrics ComputeMetrics(nsIFrame* aFrame, PRInt32 aOffset);
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// Returns true if the caret should be drawn. When |mDrawn| is true,
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// this returns true, so that we erase the drawn caret. If |aIgnoreDrawnState|
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// is true, we don't take into account whether the caret is currently
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// drawn or not. This can be used to determine if the caret is drawn when
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// it shouldn't be.
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PRBool MustDrawCaret(PRBool aIgnoreDrawnState);
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void DrawCaret(PRBool aInvalidate);
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void DrawCaretAfterBriefDelay();
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nsresult UpdateCaretRects(nsIFrame* aFrame, PRInt32 aFrameOffset);
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nsresult UpdateHookRect(nsPresContext* aPresContext,
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const Metrics& aMetrics);
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static void InvalidateRects(const nsRect &aRect, const nsRect &aHook,
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nsIFrame *aFrame);
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nsRect GetHookRect()
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{
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#ifdef IBMBIDI
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return mHookRect;
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#else
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return nsRect();
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#endif
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}
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void ToggleDrawnStatus() { mDrawn = !mDrawn; }
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already_AddRefed<nsFrameSelection> GetFrameSelection();
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// Returns true if we should not draw the caret because of XUL menu popups.
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// The caret should be hidden if:
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// 1. An open popup contains the caret, but a menu popup exists before the
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// caret-owning popup in the popup list (i.e. a menu is in front of the
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// popup with the caret). If the menu itself contains the caret we don't
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// hide it.
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// 2. A menu popup is open, but there is no caret present in any popup.
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// 3. The caret selection is empty.
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PRBool IsMenuPopupHidingCaret();
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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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// XXX these fields should go away and the values be acquired as needed,
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// probably by ComputeMetrics.
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PRUint32 mBlinkRate; // time for one cyle (off then on), in milliseconds
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nscoord mCaretWidthCSSPx; // caret width in CSS pixels
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PRPackedBool mVisible; // is the caret blinking
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PRPackedBool mDrawn; // Denotes when the caret is physically drawn on the screen.
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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, in the coodinates of the last frame.
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nsCOMPtr<nsIContent> mLastContent; // store the content the caret was last requested to be drawn
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// in (by DrawAtPosition()/DrawCaret()),
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// note that this can be different than where it was
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// actually drawn (anon <BR> in text control)
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PRInt32 mLastContentOffset; // the offset for the last request
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nsFrameSelection::HINT mLastHint; // the hint associated with the last request, see also
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// mLastBidiLevel below
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PRPackedBool mIgnoreUserModify;
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#ifdef IBMBIDI
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nsRect mHookRect; // directional hook on the caret
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PRUint8 mLastBidiLevel; // saved bidi level of the last draw request, to use when we erase
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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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