зеркало из https://github.com/mozilla/pjs.git
143 строки
4.2 KiB
C++
143 строки
4.2 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
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the 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 Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998-1999 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#include "InsertElementTxn.h"
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#include "nsISelection.h"
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#include "nsIContent.h"
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#include "nsIDOMNodeList.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::DoTransaction(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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nsString namestr;
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mNode->GetNodeName(namestr);
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char* nodename = namestr.ToNewCString();
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printf("%p Do Insert Element of %p <%s> into parent %p at offset %d\n",
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this, nodeAsContent.get(), nodename,
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parentAsContent.get(), mOffset);
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nsMemory::Free(nodename);
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}
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if (!mNode || !mParent) return NS_ERROR_NOT_INITIALIZED;
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nsCOMPtr<nsIDOMNodeList> childNodes;
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nsCOMPtr<nsIDOMNode>refNode;
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nsresult result = mParent->GetChildNodes(getter_AddRefs(childNodes));
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if (NS_FAILED(result)) return result;
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if (childNodes)
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{
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PRUint32 count;
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childNodes->GetLength(&count);
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if (mOffset>(PRInt32)count) mOffset = count;
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result = childNodes->Item(mOffset, getter_AddRefs(refNode));
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if (NS_FAILED(result)) return result;
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// note, it's ok for mRefNode to be null. that means append
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}
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mEditor->MarkNodeDirty(mNode);
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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_FAILED(result)) return result;
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if (!resultNode) return NS_ERROR_NULL_POINTER;
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// only set selection to insertion 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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{
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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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// place the selection just after the inserted element
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selection->Collapse(mParent, mOffset+1);
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}
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else
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{
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// do nothing - dom range gravity will adjust selection
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}
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return result;
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}
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NS_IMETHODIMP InsertElementTxn::UndoTransaction(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) return NS_ERROR_NOT_INITIALIZED;
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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(nsITransaction *aTransaction, PRBool *aDidMerge)
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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::GetTxnDescription(nsAWritableString& aString)
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{
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aString.Assign(NS_LITERAL_STRING("InsertElementTxn"));
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return NS_OK;
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}
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