LCOV - code coverage report
Current view: directory - editor/libeditor/base - DeleteElementTxn.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 90 2 2.2 %
Date: 2012-06-02 Functions: 14 2 14.3 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is mozilla.org code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * Netscape Communications Corporation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 1998-1999
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      26                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : #include "nsReadableUtils.h"
      39                 : #include "nsCRT.h"
      40                 : 
      41                 : #include "DeleteElementTxn.h"
      42                 : #include "nsSelectionState.h"
      43                 : #ifdef NS_DEBUG
      44                 : #include "nsIDOMElement.h"
      45                 : #endif
      46                 : 
      47                 : #ifdef NS_DEBUG
      48                 : static bool gNoisy = false;
      49                 : #endif
      50                 : 
      51                 : 
      52               0 : DeleteElementTxn::DeleteElementTxn()
      53                 : : EditTxn()
      54                 : ,mElement()
      55                 : ,mParent()
      56                 : ,mRefNode()
      57               0 : ,mRangeUpdater(nsnull)
      58                 : {
      59               0 : }
      60                 : 
      61            1464 : NS_IMPL_CYCLE_COLLECTION_CLASS(DeleteElementTxn)
      62                 : 
      63               0 : NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(DeleteElementTxn, EditTxn)
      64               0 :   NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mElement)
      65               0 :   NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mParent)
      66               0 :   NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mRefNode)
      67               0 : NS_IMPL_CYCLE_COLLECTION_UNLINK_END
      68                 : 
      69               0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(DeleteElementTxn, EditTxn)
      70               0 :   NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mElement)
      71               0 :   NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mParent)
      72               0 :   NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mRefNode)
      73               0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
      74                 : 
      75               0 : NS_IMPL_ADDREF_INHERITED(DeleteElementTxn, EditTxn)
      76               0 : NS_IMPL_RELEASE_INHERITED(DeleteElementTxn, EditTxn)
      77               0 : NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DeleteElementTxn)
      78               0 : NS_INTERFACE_MAP_END_INHERITING(EditTxn)
      79                 : 
      80               0 : NS_IMETHODIMP DeleteElementTxn::Init(nsIEditor *aEditor,
      81                 :                                      nsIDOMNode *aElement,
      82                 :                                      nsRangeUpdater *aRangeUpdater)
      83                 : {
      84               0 :   NS_ENSURE_TRUE(aEditor && aElement, NS_ERROR_NULL_POINTER);
      85               0 :   mEditor = aEditor;
      86               0 :   mElement = do_QueryInterface(aElement);
      87               0 :   nsresult result = mElement->GetParentNode(getter_AddRefs(mParent));
      88               0 :   if (NS_FAILED(result)) { return result; }
      89                 : 
      90                 :   // do nothing if the parent is read-only
      91               0 :   if (mParent && !mEditor->IsModifiableNode(mParent)) {
      92               0 :     return NS_ERROR_FAILURE;
      93                 :   }
      94                 : 
      95               0 :   mRangeUpdater = aRangeUpdater;
      96               0 :   return NS_OK;
      97                 : }
      98                 : 
      99                 : 
     100               0 : NS_IMETHODIMP DeleteElementTxn::DoTransaction(void)
     101                 : {
     102                 : #ifdef NS_DEBUG
     103               0 :   if (gNoisy)
     104                 :   {
     105                 :     printf("%p Do Delete Element element = %p\n",
     106                 :            static_cast<void*>(this),
     107               0 :            static_cast<void*>(mElement.get()));
     108                 :   }
     109                 : #endif
     110                 : 
     111               0 :   NS_ENSURE_TRUE(mElement, NS_ERROR_NOT_INITIALIZED);
     112                 : 
     113               0 :   if (!mParent) { return NS_OK; }  // this is a no-op, there's no parent to delete mElement from
     114                 : 
     115                 : #ifdef NS_DEBUG
     116                 :   // begin debug output
     117               0 :   nsCOMPtr<nsIDOMElement> element = do_QueryInterface(mElement);
     118               0 :   nsAutoString elementTag(NS_LITERAL_STRING("text node"));
     119               0 :   if (element)
     120               0 :     element->GetTagName(elementTag);
     121               0 :   nsCOMPtr<nsIDOMElement> parentElement = do_QueryInterface(mParent);
     122               0 :   nsAutoString parentElementTag(NS_LITERAL_STRING("text node"));
     123               0 :   if (parentElement)
     124               0 :     parentElement->GetTagName(parentElementTag);
     125                 :   char *c, *p;
     126               0 :   c = ToNewCString(elementTag);
     127               0 :   p = ToNewCString(parentElementTag);
     128               0 :   if (c&&p)
     129                 :   {
     130               0 :     if (gNoisy)
     131               0 :       printf("  DeleteElementTxn:  deleting child %s from parent %s\n", c, p); 
     132                 : 
     133               0 :     NS_Free(c);
     134               0 :     NS_Free(p);
     135                 :   }
     136                 :   // end debug output
     137                 : #endif
     138                 : 
     139                 :   // remember which child mElement was (by remembering which child was next)
     140               0 :   mElement->GetNextSibling(getter_AddRefs(mRefNode));  // can return null mRefNode
     141                 : 
     142                 :   // give range updater a chance.  SelAdjDeleteNode() needs to be called *before*
     143                 :   // we do the action, unlike some of the other nsRangeStore update methods.
     144               0 :   if (mRangeUpdater) 
     145               0 :     mRangeUpdater->SelAdjDeleteNode(mElement);
     146                 : 
     147               0 :   nsCOMPtr<nsIDOMNode> resultNode;
     148               0 :   return mParent->RemoveChild(mElement, getter_AddRefs(resultNode));
     149                 : }
     150                 : 
     151               0 : NS_IMETHODIMP DeleteElementTxn::UndoTransaction(void)
     152                 : {
     153                 : #ifdef NS_DEBUG
     154               0 :   if (gNoisy)
     155                 :   {
     156                 :     printf("%p Undo Delete Element element = %p, parent = %p\n",
     157                 :            static_cast<void*>(this),
     158               0 :            static_cast<void*>(mElement.get()),
     159               0 :            static_cast<void*>(mParent.get()));
     160                 :   }
     161                 : #endif
     162                 : 
     163               0 :   if (!mParent) { return NS_OK; } // this is a legal state, the txn is a no-op
     164               0 :   if (!mElement) { return NS_ERROR_NULL_POINTER; }
     165                 : 
     166                 : #ifdef NS_DEBUG
     167                 :   // begin debug output
     168               0 :   nsCOMPtr<nsIDOMElement> element = do_QueryInterface(mElement);
     169               0 :   nsAutoString elementTag(NS_LITERAL_STRING("text node"));
     170               0 :   if (element)
     171               0 :     element->GetTagName(elementTag);
     172               0 :   nsCOMPtr<nsIDOMElement> parentElement = do_QueryInterface(mParent);
     173               0 :   nsAutoString parentElementTag(NS_LITERAL_STRING("text node"));
     174               0 :   if (parentElement)
     175               0 :     parentElement->GetTagName(parentElementTag);
     176                 :   char *c, *p;
     177               0 :   c = ToNewCString(elementTag);
     178               0 :   p = ToNewCString(parentElementTag);
     179               0 :   if (c&&p)
     180                 :   {
     181               0 :     if (gNoisy)
     182               0 :       printf("  DeleteElementTxn:  inserting child %s back into parent %s\n", c, p); 
     183                 : 
     184               0 :     NS_Free(c);
     185               0 :     NS_Free(p);
     186                 :   }
     187                 :   // end debug output
     188                 : #endif
     189                 : 
     190               0 :   nsCOMPtr<nsIDOMNode> resultNode;
     191               0 :   return mParent->InsertBefore(mElement, mRefNode, getter_AddRefs(resultNode));
     192                 : }
     193                 : 
     194               0 : NS_IMETHODIMP DeleteElementTxn::RedoTransaction(void)
     195                 : {
     196                 : #ifdef NS_DEBUG
     197               0 :   if (gNoisy)
     198                 :   {
     199                 :     printf("%p Redo Delete Element element = %p, parent = %p\n",
     200                 :            static_cast<void*>(this),
     201               0 :            static_cast<void*>(mElement.get()),
     202               0 :            static_cast<void*>(mParent.get()));
     203                 :   }
     204                 : #endif
     205                 : 
     206               0 :   if (!mParent) { return NS_OK; } // this is a legal state, the txn is a no-op
     207               0 :   if (!mElement) { return NS_ERROR_NULL_POINTER; }
     208                 : 
     209               0 :   if (mRangeUpdater) 
     210               0 :     mRangeUpdater->SelAdjDeleteNode(mElement);
     211                 : 
     212               0 :   nsCOMPtr<nsIDOMNode> resultNode;
     213               0 :   return mParent->RemoveChild(mElement, getter_AddRefs(resultNode));
     214                 : }
     215                 : 
     216               0 : NS_IMETHODIMP DeleteElementTxn::GetTxnDescription(nsAString& aString)
     217                 : {
     218               0 :   aString.AssignLiteral("DeleteElementTxn");
     219               0 :   return NS_OK;
     220            4392 : }

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