1999-01-07 20:56:20 +03:00
|
|
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
|
|
*
|
|
|
|
* The contents of this file are subject to the Netscape Public License
|
|
|
|
* Version 1.0 (the "NPL"); you may not use this file except in
|
|
|
|
* compliance with the NPL. You may obtain a copy of the NPL at
|
|
|
|
* http://www.mozilla.org/NPL/
|
|
|
|
*
|
|
|
|
* Software distributed under the NPL is distributed on an "AS IS" basis,
|
|
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
|
|
|
|
* for the specific language governing rights and limitations under the
|
|
|
|
* NPL.
|
|
|
|
*
|
|
|
|
* The Initial Developer of this code under the NPL is Netscape
|
|
|
|
* Communications Corporation. Portions created by Netscape are
|
|
|
|
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
|
|
|
|
* Reserved.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include "DeleteTextTxn.h"
|
|
|
|
#include "nsIDOMCharacterData.h"
|
1999-02-22 18:53:31 +03:00
|
|
|
#include "nsIDOMSelection.h"
|
1999-01-07 20:56:20 +03:00
|
|
|
|
1999-01-21 04:51:09 +03:00
|
|
|
|
|
|
|
DeleteTextTxn::DeleteTextTxn()
|
|
|
|
: EditTxn()
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
1999-03-02 08:30:53 +03:00
|
|
|
NS_IMETHODIMP DeleteTextTxn::Init(nsIEditor *aEditor,
|
1999-02-22 18:53:31 +03:00
|
|
|
nsIDOMCharacterData *aElement,
|
1999-01-07 20:56:20 +03:00
|
|
|
PRUint32 aOffset,
|
|
|
|
PRUint32 aNumCharsToDelete)
|
|
|
|
{
|
1999-02-22 18:53:31 +03:00
|
|
|
NS_ASSERTION(aEditor&&aElement, "bad arg");
|
|
|
|
mEditor = do_QueryInterface(aEditor);
|
1999-02-19 14:30:31 +03:00
|
|
|
mElement = do_QueryInterface(aElement);
|
1999-01-07 20:56:20 +03:00
|
|
|
mOffset = aOffset;
|
|
|
|
mNumCharsToDelete = aNumCharsToDelete;
|
1999-03-02 10:52:41 +03:00
|
|
|
NS_ASSERTION(0!=aNumCharsToDelete, "bad arg, numCharsToDelete");
|
1999-01-07 20:56:20 +03:00
|
|
|
mDeletedText = "";
|
1999-01-21 04:51:09 +03:00
|
|
|
return NS_OK;
|
1999-01-07 20:56:20 +03:00
|
|
|
}
|
|
|
|
|
1999-03-02 08:30:53 +03:00
|
|
|
NS_IMETHODIMP DeleteTextTxn::Do(void)
|
1999-01-07 20:56:20 +03:00
|
|
|
{
|
1999-02-22 18:53:31 +03:00
|
|
|
nsresult result = NS_ERROR_NULL_POINTER;
|
|
|
|
if (mEditor && mElement)
|
|
|
|
{
|
|
|
|
// get the text that we're about to delete
|
|
|
|
result = mElement->SubstringData(mOffset, mNumCharsToDelete, mDeletedText);
|
|
|
|
NS_ASSERTION(NS_SUCCEEDED(result), "could not get text to delete.");
|
|
|
|
result = mElement->DeleteData(mOffset, mNumCharsToDelete);
|
|
|
|
if (NS_SUCCEEDED(result))
|
|
|
|
{
|
|
|
|
nsCOMPtr<nsIDOMSelection> selection;
|
|
|
|
nsresult selectionResult = mEditor->GetSelection(getter_AddRefs(selection));
|
|
|
|
if (NS_SUCCEEDED(selectionResult) && selection) {
|
|
|
|
selectionResult = selection->Collapse(mElement, mOffset);
|
|
|
|
NS_ASSERTION((NS_SUCCEEDED(selectionResult)), "selection could not be collapsed after undo of insert.");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return result;
|
1999-01-07 20:56:20 +03:00
|
|
|
}
|
|
|
|
|
1999-02-22 18:53:31 +03:00
|
|
|
//XXX: we may want to store the selection state and restore it properly
|
|
|
|
// was it an insertion point or an extended selection?
|
1999-03-02 08:30:53 +03:00
|
|
|
NS_IMETHODIMP DeleteTextTxn::Undo(void)
|
1999-01-07 20:56:20 +03:00
|
|
|
{
|
1999-02-22 18:53:31 +03:00
|
|
|
nsresult result = NS_ERROR_NULL_POINTER;
|
|
|
|
if (mEditor && mElement)
|
|
|
|
{
|
|
|
|
result = mElement->InsertData(mOffset, mDeletedText);
|
|
|
|
if (NS_SUCCEEDED(result))
|
|
|
|
{
|
|
|
|
nsCOMPtr<nsIDOMSelection> selection;
|
|
|
|
nsresult selectionResult = mEditor->GetSelection(getter_AddRefs(selection));
|
|
|
|
if (NS_SUCCEEDED(selectionResult) && selection) {
|
|
|
|
selectionResult = selection->Collapse(mElement, mOffset);
|
|
|
|
NS_ASSERTION((NS_SUCCEEDED(selectionResult)), "selection could not be collapsed after undo of insert.");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return result;
|
1999-01-07 20:56:20 +03:00
|
|
|
}
|
|
|
|
|
1999-03-02 08:30:53 +03:00
|
|
|
NS_IMETHODIMP DeleteTextTxn::Merge(PRBool *aDidMerge, nsITransaction *aTransaction)
|
1999-01-07 20:56:20 +03:00
|
|
|
{
|
1999-01-14 21:02:45 +03:00
|
|
|
if (nsnull!=aDidMerge)
|
|
|
|
*aDidMerge=PR_FALSE;
|
1999-01-07 20:56:20 +03:00
|
|
|
return NS_OK;
|
|
|
|
}
|
|
|
|
|
1999-03-02 08:30:53 +03:00
|
|
|
NS_IMETHODIMP DeleteTextTxn::Write(nsIOutputStream *aOutputStream)
|
1999-01-07 20:56:20 +03:00
|
|
|
{
|
|
|
|
return NS_OK;
|
|
|
|
}
|
|
|
|
|
1999-03-02 08:30:53 +03:00
|
|
|
NS_IMETHODIMP DeleteTextTxn::GetUndoString(nsString **aString)
|
1999-01-07 20:56:20 +03:00
|
|
|
{
|
|
|
|
if (nsnull!=aString)
|
|
|
|
{
|
|
|
|
**aString="Insert Text: ";
|
|
|
|
**aString += mDeletedText;
|
|
|
|
}
|
|
|
|
return NS_OK;
|
|
|
|
}
|
|
|
|
|
1999-03-02 08:30:53 +03:00
|
|
|
NS_IMETHODIMP DeleteTextTxn::GetRedoString(nsString **aString)
|
1999-01-07 20:56:20 +03:00
|
|
|
{
|
|
|
|
if (nsnull!=aString)
|
|
|
|
{
|
|
|
|
**aString="Remove Text: ";
|
|
|
|
**aString += mDeletedText;
|
|
|
|
}
|
|
|
|
return NS_OK;
|
|
|
|
}
|