LCOV - app.info - editor/libeditor/base/DeleteElementTxn.cpp

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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