LCOV - code coverage report
Current view: directory - editor/libeditor/base - DeleteTextTxn.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 57 2 3.5 %
Date: 2012-06-02 Functions: 11 2 18.2 %

       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
      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 "DeleteTextTxn.h"
      39                 : #include "nsIDOMCharacterData.h"
      40                 : #include "nsISelection.h"
      41                 : #include "nsSelectionState.h"
      42                 : 
      43                 : #ifdef NS_DEBUG
      44                 : static bool gNoisy = false;
      45                 : #endif
      46                 : 
      47               0 : DeleteTextTxn::DeleteTextTxn()
      48                 : : EditTxn()
      49                 : ,mEditor(nsnull)
      50                 : ,mElement()
      51                 : ,mOffset(0)
      52                 : ,mNumCharsToDelete(0)
      53               0 : ,mRangeUpdater(nsnull)
      54                 : {
      55               0 : }
      56                 : 
      57            1464 : NS_IMPL_CYCLE_COLLECTION_CLASS(DeleteTextTxn)
      58                 : 
      59               0 : NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(DeleteTextTxn, EditTxn)
      60               0 :   NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mElement)
      61               0 : NS_IMPL_CYCLE_COLLECTION_UNLINK_END
      62                 : 
      63               0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(DeleteTextTxn, EditTxn)
      64               0 :   NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mElement)
      65               0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
      66                 : 
      67               0 : NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DeleteTextTxn)
      68               0 : NS_INTERFACE_MAP_END_INHERITING(EditTxn)
      69                 : 
      70               0 : NS_IMETHODIMP DeleteTextTxn::Init(nsIEditor *aEditor,
      71                 :                                   nsIDOMCharacterData *aElement,
      72                 :                                   PRUint32 aOffset,
      73                 :                                   PRUint32 aNumCharsToDelete,
      74                 :                                   nsRangeUpdater *aRangeUpdater)
      75                 : {
      76               0 :   NS_ASSERTION(aEditor&&aElement, "bad arg");
      77               0 :   if (!aEditor || !aElement) { return NS_ERROR_NULL_POINTER; }
      78                 : 
      79               0 :   mEditor = aEditor;
      80               0 :   mElement = do_QueryInterface(aElement);
      81                 :   // do nothing if the node is read-only
      82               0 :   if (!mEditor->IsModifiableNode(mElement)) {
      83               0 :     return NS_ERROR_FAILURE;
      84                 :   }
      85                 : 
      86               0 :   mOffset = aOffset;
      87               0 :   mNumCharsToDelete = aNumCharsToDelete;
      88               0 :   NS_ASSERTION(0!=aNumCharsToDelete, "bad arg, numCharsToDelete");
      89                 :   PRUint32 count;
      90               0 :   aElement->GetLength(&count);
      91               0 :   NS_ASSERTION(count>=aNumCharsToDelete, "bad arg, numCharsToDelete.  Not enough characters in node");
      92               0 :   NS_ASSERTION(count>=aOffset+aNumCharsToDelete, "bad arg, numCharsToDelete.  Not enough characters in node");
      93               0 :   mDeletedText.Truncate();
      94               0 :   mRangeUpdater = aRangeUpdater;
      95               0 :   return NS_OK;
      96                 : }
      97                 : 
      98               0 : NS_IMETHODIMP DeleteTextTxn::DoTransaction(void)
      99                 : {
     100                 : #ifdef NS_DEBUG
     101               0 :   if (gNoisy) { printf("Do Delete Text\n"); }
     102                 : #endif
     103                 : 
     104               0 :   NS_ASSERTION(mEditor && mElement, "bad state");
     105               0 :   if (!mEditor || !mElement) { return NS_ERROR_NOT_INITIALIZED; }
     106                 :   // get the text that we're about to delete
     107               0 :   nsresult result = mElement->SubstringData(mOffset, mNumCharsToDelete, mDeletedText);
     108               0 :   NS_ASSERTION(NS_SUCCEEDED(result), "could not get text to delete.");
     109               0 :   result = mElement->DeleteData(mOffset, mNumCharsToDelete);
     110               0 :   NS_ENSURE_SUCCESS(result, result);
     111                 : 
     112               0 :   if (mRangeUpdater) 
     113               0 :     mRangeUpdater->SelAdjDeleteText(mElement, mOffset, mNumCharsToDelete);
     114                 : 
     115                 :   // only set selection to deletion point if editor gives permission
     116                 :   bool bAdjustSelection;
     117               0 :   mEditor->ShouldTxnSetSelection(&bAdjustSelection);
     118               0 :   if (bAdjustSelection)
     119                 :   {
     120               0 :     nsCOMPtr<nsISelection> selection;
     121               0 :     result = mEditor->GetSelection(getter_AddRefs(selection));
     122               0 :     NS_ENSURE_SUCCESS(result, result);
     123               0 :     NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
     124               0 :     result = selection->Collapse(mElement, mOffset);
     125               0 :     NS_ASSERTION((NS_SUCCEEDED(result)), "selection could not be collapsed after undo of deletetext.");
     126                 :   }
     127                 :   else
     128                 :   {
     129                 :     // do nothing - dom range gravity will adjust selection
     130                 :   }
     131               0 :   return result;
     132                 : }
     133                 : 
     134                 : //XXX: we may want to store the selection state and restore it properly
     135                 : //     was it an insertion point or an extended selection?
     136               0 : NS_IMETHODIMP DeleteTextTxn::UndoTransaction(void)
     137                 : {
     138                 : #ifdef NS_DEBUG
     139               0 :   if (gNoisy) { printf("Undo Delete Text\n"); }
     140                 : #endif
     141                 : 
     142               0 :   NS_ASSERTION(mEditor && mElement, "bad state");
     143               0 :   if (!mEditor || !mElement) { return NS_ERROR_NOT_INITIALIZED; }
     144                 : 
     145               0 :   return mElement->InsertData(mOffset, mDeletedText);
     146                 : }
     147                 : 
     148               0 : NS_IMETHODIMP DeleteTextTxn::GetTxnDescription(nsAString& aString)
     149                 : {
     150               0 :   aString.AssignLiteral("DeleteTextTxn: ");
     151               0 :   aString += mDeletedText;
     152               0 :   return NS_OK;
     153            4392 : }

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