зеркало из https://github.com/mozilla/gecko-dev.git
219 строки
6.8 KiB
C++
219 строки
6.8 KiB
C++
/* -*- 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: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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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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* 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
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998-1999
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or 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 MPL, 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 MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsReadableUtils.h"
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#include "nsCRT.h"
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#include "DeleteElementTxn.h"
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#include "nsSelectionState.h"
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#ifdef NS_DEBUG
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#include "nsIDOMElement.h"
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#endif
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#ifdef NS_DEBUG
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static PRBool gNoisy = PR_FALSE;
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#endif
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DeleteElementTxn::DeleteElementTxn()
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: EditTxn()
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,mElement()
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,mParent()
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,mRefNode()
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,mRangeUpdater(nsnull)
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{
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}
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NS_IMPL_CYCLE_COLLECTION_CLASS(DeleteElementTxn)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(DeleteElementTxn, EditTxn)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mElement)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mParent)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mRefNode)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(DeleteElementTxn, EditTxn)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mElement)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mParent)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mRefNode)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DeleteElementTxn)
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NS_INTERFACE_MAP_END_INHERITING(EditTxn)
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NS_IMETHODIMP DeleteElementTxn::Init(nsIEditor *aEditor,
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nsIDOMNode *aElement,
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nsRangeUpdater *aRangeUpdater)
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{
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if (!aEditor || !aElement) return NS_ERROR_NULL_POINTER;
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mEditor = aEditor;
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mElement = do_QueryInterface(aElement);
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nsresult result = mElement->GetParentNode(getter_AddRefs(mParent));
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if (NS_FAILED(result)) { return result; }
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// do nothing if the parent is read-only
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if (mParent && !mEditor->IsModifiableNode(mParent)) {
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return NS_ERROR_FAILURE;
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}
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mRangeUpdater = aRangeUpdater;
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return NS_OK;
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}
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NS_IMETHODIMP DeleteElementTxn::DoTransaction(void)
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{
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#ifdef NS_DEBUG
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if (gNoisy)
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{
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printf("%p Do Delete Element element = %p\n",
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static_cast<void*>(this),
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static_cast<void*>(mElement.get()));
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}
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#endif
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if (!mElement) return NS_ERROR_NOT_INITIALIZED;
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if (!mParent) { return NS_OK; } // this is a no-op, there's no parent to delete mElement from
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#ifdef NS_DEBUG
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// begin debug output
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nsCOMPtr<nsIDOMElement> element = do_QueryInterface(mElement);
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nsAutoString elementTag(NS_LITERAL_STRING("text node"));
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if (element)
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element->GetTagName(elementTag);
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nsCOMPtr<nsIDOMElement> parentElement = do_QueryInterface(mParent);
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nsAutoString parentElementTag(NS_LITERAL_STRING("text node"));
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if (parentElement)
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parentElement->GetTagName(parentElementTag);
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char *c, *p;
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c = ToNewCString(elementTag);
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p = ToNewCString(parentElementTag);
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if (c&&p)
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{
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if (gNoisy)
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printf(" DeleteElementTxn: deleting child %s from parent %s\n", c, p);
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NS_Free(c);
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NS_Free(p);
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}
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// end debug output
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#endif
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// remember which child mElement was (by remembering which child was next)
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mElement->GetNextSibling(getter_AddRefs(mRefNode)); // can return null mRefNode
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// give range updater a chance. SelAdjDeleteNode() needs to be called *before*
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// we do the action, unlike some of the other nsRangeStore update methods.
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if (mRangeUpdater)
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mRangeUpdater->SelAdjDeleteNode(mElement);
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nsCOMPtr<nsIDOMNode> resultNode;
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return mParent->RemoveChild(mElement, getter_AddRefs(resultNode));
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}
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NS_IMETHODIMP DeleteElementTxn::UndoTransaction(void)
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{
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#ifdef NS_DEBUG
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if (gNoisy)
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{
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printf("%p Undo Delete Element element = %p, parent = %p\n",
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static_cast<void*>(this),
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static_cast<void*>(mElement.get()),
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static_cast<void*>(mParent.get()));
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}
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#endif
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if (!mParent) { return NS_OK; } // this is a legal state, the txn is a no-op
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if (!mElement) { return NS_ERROR_NULL_POINTER; }
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#ifdef NS_DEBUG
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// begin debug output
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nsCOMPtr<nsIDOMElement> element = do_QueryInterface(mElement);
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nsAutoString elementTag(NS_LITERAL_STRING("text node"));
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if (element)
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element->GetTagName(elementTag);
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nsCOMPtr<nsIDOMElement> parentElement = do_QueryInterface(mParent);
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nsAutoString parentElementTag(NS_LITERAL_STRING("text node"));
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if (parentElement)
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parentElement->GetTagName(parentElementTag);
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char *c, *p;
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c = ToNewCString(elementTag);
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p = ToNewCString(parentElementTag);
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if (c&&p)
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{
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if (gNoisy)
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printf(" DeleteElementTxn: inserting child %s back into parent %s\n", c, p);
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NS_Free(c);
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NS_Free(p);
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}
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// end debug output
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#endif
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nsCOMPtr<nsIDOMNode> resultNode;
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return mParent->InsertBefore(mElement, mRefNode, getter_AddRefs(resultNode));
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}
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NS_IMETHODIMP DeleteElementTxn::RedoTransaction(void)
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{
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#ifdef NS_DEBUG
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if (gNoisy)
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{
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printf("%p Redo Delete Element element = %p, parent = %p\n",
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static_cast<void*>(this),
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static_cast<void*>(mElement.get()),
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static_cast<void*>(mParent.get()));
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}
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#endif
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if (!mParent) { return NS_OK; } // this is a legal state, the txn is a no-op
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if (!mElement) { return NS_ERROR_NULL_POINTER; }
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if (mRangeUpdater)
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mRangeUpdater->SelAdjDeleteNode(mElement);
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nsCOMPtr<nsIDOMNode> resultNode;
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return mParent->RemoveChild(mElement, getter_AddRefs(resultNode));
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}
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NS_IMETHODIMP DeleteElementTxn::GetTxnDescription(nsAString& aString)
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{
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aString.AssignLiteral("DeleteElementTxn");
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return NS_OK;
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}
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