mirror of
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231 lines
7.8 KiB
C++
231 lines
7.8 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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/* ***** 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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#ifndef nsICaret_h__
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#define nsICaret_h__
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#include "nsISupports.h"
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#include "nsCOMPtr.h"
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#include "nsCoord.h"
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#include "nsFrameSelection.h"
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struct nsRect;
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struct nsPoint;
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class nsIRenderingContext;
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class nsIFrame;
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class nsIView;
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class nsIPresShell;
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class nsISelection;
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class nsIDOMNode;
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// IID for the nsICaret interface
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#define NS_ICARET_IID \
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{ 0xb899c578, 0x0894, 0x4d3b, \
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{ 0x81, 0xa0, 0x7a, 0xfe, 0x4f, 0xb9, 0xa9, 0x39 } }
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class nsICaret: public nsISupports
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_ICARET_IID)
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enum EViewCoordinates {
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eTopLevelWindowCoordinates,
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eRenderingViewCoordinates,
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eClosestViewCoordinates,
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eIMECoordinates
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};
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NS_IMETHOD Init(nsIPresShell *inPresShell) = 0;
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NS_IMETHOD Terminate() = 0;
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NS_IMETHOD GetCaretDOMSelection(nsISelection **aDOMSel) = 0;
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NS_IMETHOD SetCaretDOMSelection(nsISelection *aDOMSel) = 0;
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/** SetCaretVisible will set the visibility of the caret
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* @param inMakeVisible PR_TRUE to show the caret, PR_FALSE to hide it
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*/
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NS_IMETHOD SetCaretVisible(PRBool inMakeVisible) = 0;
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/** GetCaretVisible will get the visibility of the caret
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* @param inMakeVisible PR_TRUE it is shown, PR_FALSE it is hidden
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*/
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NS_IMETHOD GetCaretVisible(PRBool *outMakeVisible) = 0;
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/** SetCaretReadOnly set the appearance of the caret
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* @param inMakeReadonly PR_TRUE to show the caret in a 'read only' state,
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* PR_FALSE to show the caret in normal, editing state
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*/
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NS_IMETHOD SetCaretReadOnly(PRBool inMakeReadonly) = 0;
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virtual PRBool GetCaretReadOnly() = 0;
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/** GetCaretCoordinates
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* Get the position of the caret in coordinates relative to the typed
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* specified (aRelativeToType).
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* If the selection is collapsed, this returns the caret location
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* and true in outIsCollapsed.
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* If the selection is not collapsed, this returns the location of the focus pos,
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* and false in outIsCollapsed.
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*/
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NS_IMETHOD GetCaretCoordinates(EViewCoordinates aRelativeToType,
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nsISelection *aDOMSel,
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nsRect *outCoordinates,
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PRBool *outIsCollapsed,
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nsIView **outView) = 0;
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/** Erase Caret
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* this will erase the caret if its drawn and reset drawn status
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*/
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NS_IMETHOD EraseCaret() = 0;
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NS_IMETHOD SetVisibilityDuringSelection(PRBool aVisibilityDuringSelection) = 0;
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/** DrawAtPosition
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*
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* Draw the caret explicitly, at the specified node and offset.
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* To avoid drawing glitches, you should call EraseCaret()
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* after each call to DrawAtPosition().
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*
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* Note: This call breaks the caret's ability to blink at all.
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**/
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NS_IMETHOD DrawAtPosition(nsIDOMNode* aNode, PRInt32 aOffset) = 0;
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/** GetCaretFrameForNodeOffset
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* Get the frame and content offset at which the caret is drawn,
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* invoking the bidi caret positioning algorithm if necessary
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**/
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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) = 0;
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/** GetCaretFrame
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* Get the current frame that the caret should be drawn in. If the caret is
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* not currently visible (i.e., it is between blinks), then this will
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* return null.
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*/
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virtual nsIFrame *GetCaretFrame() = 0;
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/** GetCaretRect
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* Get the current caret rect. Only call this when GetCaretFrame returns
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* non-null.
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*/
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virtual nsRect GetCaretRect() = 0;
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/** GetCaretContent
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* Get the content that the caret was last drawn in.
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*/
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virtual nsIContent* GetCaretContent() = 0;
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/** InvalidateOutsideCaret
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* Invalidate the area that the caret currently occupies if the caret is
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* outside of its frame's overflow area. This is used when the content that
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* the caret is currently drawn is is being deleted or reflowed.
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*/
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virtual void InvalidateOutsideCaret() = 0;
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/** UpdateCaretPosition
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* Update the caret's current frame and rect, but don't draw yet. This is
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* useful for flickerless moving of the caret (e.g., when the frame the
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* caret is in reflows and is moved).
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*/
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virtual void UpdateCaretPosition() = 0;
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/** PaintCaret
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* Actually paint the caret onto the given rendering context.
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*/
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virtual void PaintCaret(nsDisplayListBuilder *aBuilder,
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nsIRenderingContext *aCtx,
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const nsPoint &aOffset,
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nscolor aColor) = 0;
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/**
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* Sets whether the caret should only be visible in nodes that are not
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* user-modify: read-only, or whether it should be visible in all nodes.
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*
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* @param aIgnoreUserModify PR_TRUE to have the cursor visible in all nodes,
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* PR_FALSE to have it visible in all nodes except
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* those with user-modify: read-only
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*/
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virtual void SetIgnoreUserModify(PRBool aIgnoreUserModify) = 0;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsICaret, NS_ICARET_IID)
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nsresult
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NS_NewCaret(nsICaret** aInstancePtrResult);
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// handy stack-based class for temporarily disabling the caret
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class StCaretHider
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{
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public:
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StCaretHider(nsICaret* aSelCon)
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: mWasVisible(PR_FALSE), mCaret(aSelCon)
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{
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if (mCaret)
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{
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mCaret->GetCaretVisible(&mWasVisible);
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if (mWasVisible)
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mCaret->SetCaretVisible(PR_FALSE);
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}
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}
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~StCaretHider()
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{
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if (mCaret && mWasVisible)
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mCaret->SetCaretVisible(PR_TRUE);
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// nsCOMPtr releases mPresShell
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}
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protected:
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PRBool mWasVisible;
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nsCOMPtr<nsICaret> mCaret;
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};
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#endif // nsICaret_h__
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