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/* -*- 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: NPL 1.1/GPL 2.0/LGPL 2.1
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* The contents of this file are subject to the Netscape Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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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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* The Original Code is mozilla.org code.
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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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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* 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 NPL, 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 NPL, the GPL or the LGPL.
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* ***** END LICENSE BLOCK ***** */
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#include "DeleteTextTxn.h"
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#include "nsIDOMCharacterData.h"
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#include "nsISelection.h"
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#include "nsSelectionState.h"
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static PRBool gNoisy = PR_FALSE;
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DeleteTextTxn::DeleteTextTxn()
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,mRangeUpdater(nsnull)
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DeleteTextTxn::~DeleteTextTxn()
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NS_IMETHODIMP DeleteTextTxn::Init(nsIEditor *aEditor,
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nsIDOMCharacterData *aElement,
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PRUint32 aNumCharsToDelete,
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nsRangeUpdater *aRangeUpdater)
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NS_ASSERTION(aEditor&&aElement, "bad arg");
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if (!aEditor || !aElement) { return NS_ERROR_NULL_POINTER; }
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mElement = do_QueryInterface(aElement);
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mNumCharsToDelete = aNumCharsToDelete;
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NS_ASSERTION(0!=aNumCharsToDelete, "bad arg, numCharsToDelete");
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aElement->GetLength(&count);
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NS_ASSERTION(count>=aNumCharsToDelete, "bad arg, numCharsToDelete. Not enough characters in node");
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NS_ASSERTION(count>=aOffset+aNumCharsToDelete, "bad arg, numCharsToDelete. Not enough characters in node");
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mDeletedText.Truncate();
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mRangeUpdater = aRangeUpdater;
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NS_IMETHODIMP DeleteTextTxn::DoTransaction(void)
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if (gNoisy) { printf("Do Delete Text\n"); }
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NS_ASSERTION(mEditor && mElement, "bad state");
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if (!mEditor || !mElement) { return NS_ERROR_NOT_INITIALIZED; }
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// get the text that we're about to delete
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nsresult result = mElement->SubstringData(mOffset, mNumCharsToDelete, mDeletedText);
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NS_ASSERTION(NS_SUCCEEDED(result), "could not get text to delete.");
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result = mElement->DeleteData(mOffset, mNumCharsToDelete);
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if (NS_FAILED(result)) return result;
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mRangeUpdater->SelAdjDeleteText(mElement, mOffset, mNumCharsToDelete);
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// only set selection to deletion point if editor gives permission
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PRBool bAdjustSelection;
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mEditor->ShouldTxnSetSelection(&bAdjustSelection);
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if (bAdjustSelection)
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nsCOMPtr<nsISelection> selection;
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result = mEditor->GetSelection(getter_AddRefs(selection));
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if (NS_FAILED(result)) return result;
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if (!selection) return NS_ERROR_NULL_POINTER;
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result = selection->Collapse(mElement, mOffset);
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NS_ASSERTION((NS_SUCCEEDED(result)), "selection could not be collapsed after undo of deletetext.");
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// do nothing - dom range gravity will adjust selection
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//XXX: we may want to store the selection state and restore it properly
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// was it an insertion point or an extended selection?
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NS_IMETHODIMP DeleteTextTxn::UndoTransaction(void)
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if (gNoisy) { printf("Undo Delete Text\n"); }
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NS_ASSERTION(mEditor && mElement, "bad state");
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if (!mEditor || !mElement) { return NS_ERROR_NOT_INITIALIZED; }
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return mElement->InsertData(mOffset, mDeletedText);
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NS_IMETHODIMP DeleteTextTxn::Merge(nsITransaction *aTransaction, PRBool *aDidMerge)
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*aDidMerge = PR_FALSE;
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NS_IMETHODIMP DeleteTextTxn::GetTxnDescription(nsAString& aString)
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aString.Assign(NS_LITERAL_STRING("DeleteTextTxn: "));
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aString += mDeletedText;