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149 lines
4.0 KiB
C++
149 lines
4.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "InsertElementTxn.h"
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#include "nsIDOMSelection.h"
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#include "nsIContent.h"
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#ifdef NS_DEBUG
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static PRBool gNoisy = PR_FALSE;
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#else
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static const PRBool gNoisy = PR_FALSE;
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#endif
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InsertElementTxn::InsertElementTxn()
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: EditTxn()
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{
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}
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NS_IMETHODIMP InsertElementTxn::Init(nsIDOMNode *aNode,
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nsIDOMNode *aParent,
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PRInt32 aOffset,
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nsIEditor *aEditor)
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{
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NS_ASSERTION(aNode && aParent && aEditor, "bad arg");
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if (!aNode || !aParent || !aEditor)
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return NS_ERROR_NULL_POINTER;
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mNode = do_QueryInterface(aNode);
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mParent = do_QueryInterface(aParent);
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mOffset = aOffset;
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mEditor = aEditor;
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if (!mNode || !mParent || !mEditor)
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return NS_ERROR_INVALID_ARG;
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return NS_OK;
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}
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InsertElementTxn::~InsertElementTxn()
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{
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}
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NS_IMETHODIMP InsertElementTxn::Do(void)
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{
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if (gNoisy)
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{
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nsCOMPtr<nsIContent>nodeAsContent = do_QueryInterface(mNode);
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nsCOMPtr<nsIContent>parentAsContent = do_QueryInterface(mParent);
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printf("%p Do Insert Element of %p into parent %p at offset %d\n",
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this, nodeAsContent.get(), parentAsContent.get(), mOffset);
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}
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if (!mNode || !mParent)
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return NS_ERROR_NULL_POINTER;
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nsresult result;
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nsCOMPtr<nsIDOMNode>refNode;
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//if (0!=mOffset)
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{ // get a ref node
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PRInt32 i=0;
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result = mParent->GetFirstChild(getter_AddRefs(refNode));
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if (NS_SUCCEEDED(result) && refNode)
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{
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for (; i<mOffset; i++)
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{
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nsCOMPtr<nsIDOMNode>nextSib;
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result = refNode->GetNextSibling(getter_AddRefs(nextSib));
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if (NS_FAILED(result)) {
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break; // couldn't get a next sibling, so make aNode the first child
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}
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refNode = do_QueryInterface(nextSib);
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if (!refNode) {
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break; // couldn't get a next sibling, so make aNode the first child
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}
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}
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}
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}
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nsCOMPtr<nsIDOMNode> resultNode;
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result = mParent->InsertBefore(mNode, refNode, getter_AddRefs(resultNode));
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if (NS_SUCCEEDED(result) && resultNode)
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{
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nsCOMPtr<nsIDOMSelection> selection;
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result = mEditor->GetSelection(getter_AddRefs(selection));
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if ((NS_SUCCEEDED(result)) && selection)
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{ // place the selection just after the inserted element
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selection->Collapse(mParent, mOffset+1);
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//selection->Extend(mParent, mOffset+1);
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}
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}
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return result;
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}
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NS_IMETHODIMP InsertElementTxn::Undo(void)
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{
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if (gNoisy) { printf("%p Undo Insert Element of %p into parent %p at offset %d\n",
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this, mNode.get(), mParent.get(), mOffset); }
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if (!mNode || !mParent)
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return NS_ERROR_NULL_POINTER;
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nsCOMPtr<nsIDOMNode> resultNode;
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nsresult result = mParent->RemoveChild(mNode, getter_AddRefs(resultNode));
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return result;
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}
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NS_IMETHODIMP InsertElementTxn::Merge(PRBool *aDidMerge, nsITransaction *aTransaction)
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{
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if (nsnull!=aDidMerge)
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*aDidMerge=PR_FALSE;
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return NS_OK;
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}
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NS_IMETHODIMP InsertElementTxn::Write(nsIOutputStream *aOutputStream)
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{
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return NS_OK;
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}
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NS_IMETHODIMP InsertElementTxn::GetUndoString(nsString *aString)
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{
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if (nsnull!=aString)
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{
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*aString="Remove Element: ";
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}
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return NS_OK;
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}
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NS_IMETHODIMP InsertElementTxn::GetRedoString(nsString *aString)
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{
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if (nsnull!=aString)
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{
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*aString="Insert Element: ";
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}
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return NS_OK;
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}
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