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