зеркало из https://github.com/mozilla/pjs.git
136 строки
4.8 KiB
C++
136 строки
4.8 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 "DeleteTextTxn.h"
|
|
#include "nsIDOMCharacterData.h"
|
|
#include "nsISelection.h"
|
|
#include "nsSelectionState.h"
|
|
|
|
#ifdef NS_DEBUG
|
|
static PRBool gNoisy = PR_FALSE;
|
|
#endif
|
|
|
|
DeleteTextTxn::DeleteTextTxn()
|
|
: EditTxn()
|
|
,mEditor(nsnull)
|
|
,mElement()
|
|
,mOffset(0)
|
|
,mNumCharsToDelete(0)
|
|
,mRangeUpdater(nsnull)
|
|
{
|
|
}
|
|
|
|
NS_IMETHODIMP DeleteTextTxn::Init(nsIEditor *aEditor,
|
|
nsIDOMCharacterData *aElement,
|
|
PRUint32 aOffset,
|
|
PRUint32 aNumCharsToDelete,
|
|
nsRangeUpdater *aRangeUpdater)
|
|
{
|
|
NS_ASSERTION(aEditor&&aElement, "bad arg");
|
|
if (!aEditor || !aElement) { return NS_ERROR_NULL_POINTER; }
|
|
|
|
mEditor = aEditor;
|
|
mElement = do_QueryInterface(aElement);
|
|
mOffset = aOffset;
|
|
mNumCharsToDelete = aNumCharsToDelete;
|
|
NS_ASSERTION(0!=aNumCharsToDelete, "bad arg, numCharsToDelete");
|
|
PRUint32 count;
|
|
aElement->GetLength(&count);
|
|
NS_ASSERTION(count>=aNumCharsToDelete, "bad arg, numCharsToDelete. Not enough characters in node");
|
|
NS_ASSERTION(count>=aOffset+aNumCharsToDelete, "bad arg, numCharsToDelete. Not enough characters in node");
|
|
mDeletedText.Truncate();
|
|
mRangeUpdater = aRangeUpdater;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP DeleteTextTxn::DoTransaction(void)
|
|
{
|
|
#ifdef NS_DEBUG
|
|
if (gNoisy) { printf("Do Delete Text\n"); }
|
|
#endif
|
|
|
|
NS_ASSERTION(mEditor && mElement, "bad state");
|
|
if (!mEditor || !mElement) { return NS_ERROR_NOT_INITIALIZED; }
|
|
// get the text that we're about to delete
|
|
nsresult result = mElement->SubstringData(mOffset, mNumCharsToDelete, mDeletedText);
|
|
NS_ASSERTION(NS_SUCCEEDED(result), "could not get text to delete.");
|
|
result = mElement->DeleteData(mOffset, mNumCharsToDelete);
|
|
if (NS_FAILED(result)) return result;
|
|
|
|
if (mRangeUpdater)
|
|
mRangeUpdater->SelAdjDeleteText(mElement, mOffset, mNumCharsToDelete);
|
|
|
|
// only set selection to deletion point if editor gives permission
|
|
PRBool bAdjustSelection;
|
|
mEditor->ShouldTxnSetSelection(&bAdjustSelection);
|
|
if (bAdjustSelection)
|
|
{
|
|
nsCOMPtr<nsISelection> selection;
|
|
result = mEditor->GetSelection(getter_AddRefs(selection));
|
|
if (NS_FAILED(result)) return result;
|
|
if (!selection) return NS_ERROR_NULL_POINTER;
|
|
result = selection->Collapse(mElement, mOffset);
|
|
NS_ASSERTION((NS_SUCCEEDED(result)), "selection could not be collapsed after undo of deletetext.");
|
|
}
|
|
else
|
|
{
|
|
// do nothing - dom range gravity will adjust selection
|
|
}
|
|
return result;
|
|
}
|
|
|
|
//XXX: we may want to store the selection state and restore it properly
|
|
// was it an insertion point or an extended selection?
|
|
NS_IMETHODIMP DeleteTextTxn::UndoTransaction(void)
|
|
{
|
|
#ifdef NS_DEBUG
|
|
if (gNoisy) { printf("Undo Delete Text\n"); }
|
|
#endif
|
|
|
|
NS_ASSERTION(mEditor && mElement, "bad state");
|
|
if (!mEditor || !mElement) { return NS_ERROR_NOT_INITIALIZED; }
|
|
|
|
return mElement->InsertData(mOffset, mDeletedText);
|
|
}
|
|
|
|
NS_IMETHODIMP DeleteTextTxn::GetTxnDescription(nsAString& aString)
|
|
{
|
|
aString.AssignLiteral("DeleteTextTxn: ");
|
|
aString += mDeletedText;
|
|
return NS_OK;
|
|
}
|