LCOV - code coverage report
Current view: directory - editor/libeditor/base - SplitElementTxn.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 115 2 1.7 %
Date: 2012-06-02 Functions: 15 2 13.3 %

       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 "SplitElementTxn.h"
      39                 : #include "nsEditor.h"
      40                 : #include "nsIDOMNode.h"
      41                 : #include "nsISelection.h"
      42                 : #include "nsIDOMCharacterData.h"
      43                 : 
      44                 : #ifdef NS_DEBUG
      45                 : static bool gNoisy = false;
      46                 : #endif
      47                 : 
      48                 : 
      49                 : // note that aEditor is not refcounted
      50               0 : SplitElementTxn::SplitElementTxn()
      51               0 :   : EditTxn()
      52                 : {
      53               0 : }
      54                 : 
      55            1464 : NS_IMPL_CYCLE_COLLECTION_CLASS(SplitElementTxn)
      56                 : 
      57               0 : NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(SplitElementTxn, EditTxn)
      58               0 :   NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mParent)
      59               0 :   NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mNewLeftNode)
      60               0 : NS_IMPL_CYCLE_COLLECTION_UNLINK_END
      61                 : 
      62               0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(SplitElementTxn, EditTxn)
      63               0 :   NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mParent)
      64               0 :   NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mNewLeftNode)
      65               0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
      66                 : 
      67               0 : NS_IMPL_ADDREF_INHERITED(SplitElementTxn, EditTxn)
      68               0 : NS_IMPL_RELEASE_INHERITED(SplitElementTxn, EditTxn)
      69               0 : NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(SplitElementTxn)
      70               0 : NS_INTERFACE_MAP_END_INHERITING(EditTxn)
      71                 : 
      72               0 : NS_IMETHODIMP SplitElementTxn::Init(nsEditor   *aEditor,
      73                 :                                     nsIDOMNode *aNode,
      74                 :                                     PRInt32     aOffset)
      75                 : {
      76               0 :   NS_ASSERTION(aEditor && aNode, "bad args");
      77               0 :   if (!aEditor || !aNode) { return NS_ERROR_NOT_INITIALIZED; }
      78                 : 
      79               0 :   mEditor = aEditor;
      80               0 :   mExistingRightNode = do_QueryInterface(aNode);
      81               0 :   mOffset = aOffset;
      82               0 :   return NS_OK;
      83                 : }
      84                 : 
      85               0 : NS_IMETHODIMP SplitElementTxn::DoTransaction(void)
      86                 : {
      87                 : #ifdef NS_DEBUG
      88               0 :   if (gNoisy)
      89                 :   {
      90                 :     printf("%p Do Split of node %p offset %d\n",
      91                 :            static_cast<void*>(this),
      92               0 :            static_cast<void*>(mExistingRightNode.get()),
      93               0 :            mOffset);
      94                 :   }
      95                 : #endif
      96                 : 
      97               0 :   NS_ASSERTION(mExistingRightNode && mEditor, "bad state");
      98               0 :   if (!mExistingRightNode || !mEditor) { return NS_ERROR_NOT_INITIALIZED; }
      99                 : 
     100                 :   // create a new node
     101               0 :   nsresult result = mExistingRightNode->CloneNode(false, 1, getter_AddRefs(mNewLeftNode));
     102               0 :   NS_ASSERTION(((NS_SUCCEEDED(result)) && (mNewLeftNode)), "could not create element.");
     103               0 :   NS_ENSURE_SUCCESS(result, result);
     104               0 :   NS_ENSURE_TRUE(mNewLeftNode, NS_ERROR_NULL_POINTER);
     105               0 :   mEditor->MarkNodeDirty(mExistingRightNode);
     106                 : 
     107                 : #ifdef NS_DEBUG
     108               0 :   if (gNoisy)
     109                 :   {
     110                 :     printf("  created left node = %p\n",
     111               0 :            static_cast<void*>(mNewLeftNode.get()));
     112                 :   }
     113                 : #endif
     114                 : 
     115                 :   // get the parent node
     116               0 :   result = mExistingRightNode->GetParentNode(getter_AddRefs(mParent));
     117               0 :   NS_ENSURE_SUCCESS(result, result);
     118               0 :   NS_ENSURE_TRUE(mParent, NS_ERROR_NULL_POINTER);
     119                 : 
     120                 :   // insert the new node
     121               0 :   result = mEditor->SplitNodeImpl(mExistingRightNode, mOffset, mNewLeftNode, mParent);
     122               0 :   if (mNewLeftNode) {
     123                 :     bool bAdjustSelection;
     124               0 :     mEditor->ShouldTxnSetSelection(&bAdjustSelection);
     125               0 :     if (bAdjustSelection)
     126                 :     {
     127               0 :       nsCOMPtr<nsISelection> selection;
     128               0 :       result = mEditor->GetSelection(getter_AddRefs(selection));
     129               0 :       NS_ENSURE_SUCCESS(result, result);
     130               0 :       NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
     131               0 :       result = selection->Collapse(mNewLeftNode, mOffset);
     132                 :     }
     133                 :     else
     134                 :     {
     135                 :       // do nothing - dom range gravity will adjust selection
     136                 :     }
     137                 :   }
     138               0 :   return result;
     139                 : }
     140                 : 
     141               0 : NS_IMETHODIMP SplitElementTxn::UndoTransaction(void)
     142                 : {
     143                 : #ifdef NS_DEBUG
     144               0 :   if (gNoisy) { 
     145                 :     printf("%p Undo Split of existing node %p and new node %p offset %d\n",
     146                 :            static_cast<void*>(this),
     147               0 :            static_cast<void*>(mExistingRightNode.get()),
     148               0 :            static_cast<void*>(mNewLeftNode.get()),
     149               0 :            mOffset);
     150                 :   }
     151                 : #endif
     152                 : 
     153               0 :   NS_ASSERTION(mEditor && mExistingRightNode && mNewLeftNode && mParent, "bad state");
     154               0 :   if (!mEditor || !mExistingRightNode || !mNewLeftNode || !mParent) {
     155               0 :     return NS_ERROR_NOT_INITIALIZED;
     156                 :   }
     157                 : 
     158                 :   // this assumes Do inserted the new node in front of the prior existing node
     159               0 :   nsresult result = mEditor->JoinNodesImpl(mExistingRightNode, mNewLeftNode, mParent, false);
     160                 : #ifdef NS_DEBUG
     161               0 :   if (gNoisy) 
     162                 :   { 
     163                 :     printf("** after join left child node %p into right node %p\n",
     164               0 :            static_cast<void*>(mNewLeftNode.get()),
     165               0 :            static_cast<void*>(mExistingRightNode.get()));
     166               0 :     if (gNoisy) {mEditor->DebugDumpContent(); } // DEBUG
     167                 :   }
     168               0 :   if (NS_SUCCEEDED(result))
     169                 :   {
     170               0 :     if (gNoisy)
     171                 :     {
     172                 :       printf("  left node = %p removed\n",
     173               0 :              static_cast<void*>(mNewLeftNode.get()));
     174                 :     }
     175                 :   }
     176                 : #endif
     177                 : 
     178               0 :   return result;
     179                 : }
     180                 : 
     181                 : /* redo cannot simply resplit the right node, because subsequent transactions
     182                 :  * on the redo stack may depend on the left node existing in its previous state.
     183                 :  */
     184               0 : NS_IMETHODIMP SplitElementTxn::RedoTransaction(void)
     185                 : {
     186               0 :   NS_ASSERTION(mEditor && mExistingRightNode && mNewLeftNode && mParent, "bad state");
     187               0 :   if (!mEditor || !mExistingRightNode || !mNewLeftNode || !mParent) {
     188               0 :     return NS_ERROR_NOT_INITIALIZED;
     189                 :   }
     190                 : 
     191                 : #ifdef NS_DEBUG
     192               0 :   if (gNoisy) { 
     193                 :     printf("%p Redo Split of existing node %p and new node %p offset %d\n",
     194                 :            static_cast<void*>(this),
     195               0 :            static_cast<void*>(mExistingRightNode.get()),
     196               0 :            static_cast<void*>(mNewLeftNode.get()),
     197               0 :            mOffset);
     198               0 :     if (gNoisy) {mEditor->DebugDumpContent(); } // DEBUG
     199                 :   }
     200                 : #endif
     201                 : 
     202                 :   nsresult result;
     203               0 :   nsCOMPtr<nsIDOMNode>resultNode;
     204                 :   // first, massage the existing node so it is in its post-split state
     205               0 :   nsCOMPtr<nsIDOMCharacterData>rightNodeAsText = do_QueryInterface(mExistingRightNode);
     206               0 :   if (rightNodeAsText)
     207                 :   {
     208               0 :     result = rightNodeAsText->DeleteData(0, mOffset);
     209                 : #ifdef NS_DEBUG
     210               0 :     if (gNoisy) 
     211                 :     { 
     212                 :       printf("** after delete of text in right text node %p offset %d\n",
     213               0 :              static_cast<void*>(rightNodeAsText.get()),
     214               0 :              mOffset);
     215               0 :       mEditor->DebugDumpContent();  // DEBUG
     216                 :     }
     217                 : #endif
     218                 :   }
     219                 :   else
     220                 :   {
     221               0 :     nsCOMPtr<nsIDOMNode>child;
     222               0 :     nsCOMPtr<nsIDOMNode>nextSibling;
     223               0 :     result = mExistingRightNode->GetFirstChild(getter_AddRefs(child));
     224                 :     PRInt32 i;
     225               0 :     for (i=0; i<mOffset; i++)
     226                 :     {
     227               0 :       if (NS_FAILED(result)) {return result;}
     228               0 :       if (!child) {return NS_ERROR_NULL_POINTER;}
     229               0 :       child->GetNextSibling(getter_AddRefs(nextSibling));
     230               0 :       result = mExistingRightNode->RemoveChild(child, getter_AddRefs(resultNode));
     231               0 :       if (NS_SUCCEEDED(result)) 
     232                 :       {
     233               0 :         result = mNewLeftNode->AppendChild(child, getter_AddRefs(resultNode));
     234                 : #ifdef NS_DEBUG
     235               0 :         if (gNoisy) 
     236                 :         { 
     237                 :           printf("** move child node %p from right node %p to left node %p\n",
     238               0 :                  static_cast<void*>(child.get()),
     239               0 :                  static_cast<void*>(mExistingRightNode.get()),
     240               0 :                  static_cast<void*>(mNewLeftNode.get()));
     241               0 :           if (gNoisy) {mEditor->DebugDumpContent(); } // DEBUG
     242                 :         }
     243                 : #endif
     244                 :       }
     245               0 :       child = do_QueryInterface(nextSibling);
     246                 :     }
     247                 :   }
     248                 :   // second, re-insert the left node into the tree 
     249               0 :   result = mParent->InsertBefore(mNewLeftNode, mExistingRightNode, getter_AddRefs(resultNode));
     250                 : #ifdef NS_DEBUG
     251               0 :   if (gNoisy) 
     252                 :   { 
     253                 :     printf("** reinsert left child node %p before right node %p\n",
     254               0 :            static_cast<void*>(mNewLeftNode.get()),
     255               0 :            static_cast<void*>(mExistingRightNode.get()));
     256               0 :     if (gNoisy) {mEditor->DebugDumpContent(); } // DEBUG
     257                 :   }
     258                 : #endif
     259               0 :   return result;
     260                 : }
     261                 : 
     262                 : 
     263               0 : NS_IMETHODIMP SplitElementTxn::GetTxnDescription(nsAString& aString)
     264                 : {
     265               0 :   aString.AssignLiteral("SplitElementTxn");
     266               0 :   return NS_OK;
     267                 : }
     268                 : 
     269               0 : NS_IMETHODIMP SplitElementTxn::GetNewNode(nsIDOMNode **aNewNode)
     270                 : {
     271               0 :   NS_ENSURE_TRUE(aNewNode, NS_ERROR_NULL_POINTER);
     272               0 :   NS_ENSURE_TRUE(mNewLeftNode, NS_ERROR_NOT_INITIALIZED);
     273               0 :   *aNewNode = mNewLeftNode;
     274               0 :   NS_ADDREF(*aNewNode);
     275               0 :   return NS_OK;
     276            4392 : }

Generated by: LCOV version 1.7