mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-05 00:25:27 +00:00
121 lines
4.1 KiB
C++
121 lines
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* ***** 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 ***** */
|
|
|
|
#include "nsTextEditRules.h"
|
|
#include "nsCOMPtr.h"
|
|
#include "nsIDOMNode.h"
|
|
#include "nsIContent.h"
|
|
#include "nsIPresShell.h"
|
|
#include "nsPresContext.h"
|
|
#include "nsIFrame.h"
|
|
#include "nsISelectionPrivate.h"
|
|
#include "nsFrameSelection.h"
|
|
|
|
// Test for distance between caret and text that will be deleted
|
|
nsresult
|
|
nsTextEditRules::CheckBidiLevelForDeletion(nsISelection *aSelection,
|
|
nsIDOMNode *aSelNode,
|
|
PRInt32 aSelOffset,
|
|
nsIEditor::EDirection aAction,
|
|
PRBool *aCancel)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aCancel);
|
|
*aCancel = PR_FALSE;
|
|
|
|
nsCOMPtr<nsIPresShell> shell;
|
|
nsresult res = mEditor->GetPresShell(getter_AddRefs(shell));
|
|
if (NS_FAILED(res))
|
|
return res;
|
|
if (!shell)
|
|
return NS_ERROR_NULL_POINTER;
|
|
|
|
nsPresContext *context = shell->GetPresContext();
|
|
if (!context)
|
|
return NS_ERROR_NULL_POINTER;
|
|
|
|
if (!context->BidiEnabled())
|
|
return NS_OK;
|
|
|
|
nsCOMPtr<nsIContent> content = do_QueryInterface(aSelNode);
|
|
if (!content)
|
|
return NS_ERROR_NULL_POINTER;
|
|
|
|
PRUint8 levelBefore;
|
|
PRUint8 levelAfter;
|
|
|
|
nsCOMPtr<nsISelectionPrivate> privateSelection(do_QueryInterface(aSelection));
|
|
if (!privateSelection)
|
|
return NS_ERROR_NULL_POINTER;
|
|
|
|
nsCOMPtr<nsFrameSelection> frameSelection;
|
|
privateSelection->GetFrameSelection(getter_AddRefs(frameSelection));
|
|
if (!frameSelection)
|
|
return NS_ERROR_NULL_POINTER;
|
|
|
|
nsPrevNextBidiLevels levels = frameSelection->
|
|
GetPrevNextBidiLevels(content, aSelOffset, PR_TRUE);
|
|
|
|
levelBefore = levels.mLevelBefore;
|
|
levelAfter = levels.mLevelAfter;
|
|
|
|
PRUint8 currentCursorLevel;
|
|
res = shell->GetCaretBidiLevel(¤tCursorLevel);
|
|
if (NS_FAILED(res))
|
|
return res;
|
|
|
|
PRUint8 levelOfDeletion;
|
|
levelOfDeletion = (nsIEditor::eNext==aAction) ? levelAfter : levelBefore;
|
|
|
|
if (currentCursorLevel == levelOfDeletion)
|
|
; // perform the deletion
|
|
else
|
|
{
|
|
if (mDeleteBidiImmediately || levelBefore == levelAfter)
|
|
; // perform the deletion
|
|
else
|
|
*aCancel = PR_TRUE;
|
|
|
|
// Set the bidi level of the caret to that of the
|
|
// character that will be (or would have been) deleted
|
|
res = shell->SetCaretBidiLevel(levelOfDeletion);
|
|
if (NS_FAILED(res))
|
|
return res;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|