LCOV - code coverage report
Current view: directory - editor/libeditor/base - nsEditorUtils.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 97 0 0.0 %
Date: 2012-06-02 Functions: 17 0 0.0 %

       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                 : 
      39                 : #include "nsEditorUtils.h"
      40                 : #include "nsIDOMDocument.h"
      41                 : #include "nsIDOMRange.h"
      42                 : #include "nsIContent.h"
      43                 : #include "nsLayoutCID.h"
      44                 : 
      45                 : // hooks
      46                 : #include "nsIClipboardDragDropHooks.h"
      47                 : #include "nsIClipboardDragDropHookList.h"
      48                 : #include "nsISimpleEnumerator.h"
      49                 : #include "nsIDocShell.h"
      50                 : #include "nsIDocument.h"
      51                 : #include "nsIInterfaceRequestorUtils.h"
      52                 : 
      53                 : 
      54                 : /******************************************************************************
      55                 :  * nsAutoSelectionReset
      56                 :  *****************************************************************************/
      57                 : 
      58               0 : nsAutoSelectionReset::nsAutoSelectionReset(nsISelection *aSel, nsEditor *aEd) : 
      59                 : mSel(nsnull)
      60               0 : ,mEd(nsnull)
      61                 : { 
      62               0 :   if (!aSel || !aEd) return;    // not much we can do, bail.
      63               0 :   if (aEd->ArePreservingSelection()) return;   // we already have initted mSavedSel, so this must be nested call.
      64               0 :   mSel = do_QueryInterface(aSel);
      65               0 :   mEd = aEd;
      66               0 :   if (mSel)
      67                 :   {
      68               0 :     mEd->PreserveSelectionAcrossActions(mSel);
      69                 :   }
      70                 : }
      71                 : 
      72               0 : nsAutoSelectionReset::~nsAutoSelectionReset()
      73                 : {
      74               0 :   NS_ASSERTION(!mSel || mEd, "mEd should be non-null when mSel is");
      75               0 :   if (mSel && mEd->ArePreservingSelection())   // mSel will be null if this was nested call
      76                 :   {
      77               0 :     mEd->RestorePreservedSelection(mSel);
      78                 :   }
      79               0 : }
      80                 : 
      81                 : void
      82               0 : nsAutoSelectionReset::Abort()
      83                 : {
      84               0 :   NS_ASSERTION(!mSel || mEd, "mEd should be non-null when mSel is");
      85               0 :   if (mSel)
      86               0 :     mEd->StopPreservingSelection();
      87               0 : }
      88                 : 
      89                 : 
      90                 : /******************************************************************************
      91                 :  * some helper classes for iterating the dom tree
      92                 :  *****************************************************************************/
      93                 : 
      94               0 : nsDOMIterator::nsDOMIterator() :
      95               0 : mIter(nsnull)
      96                 : {
      97               0 : }
      98                 :     
      99               0 : nsDOMIterator::~nsDOMIterator()
     100                 : {
     101               0 : }
     102                 :     
     103                 : nsresult
     104               0 : nsDOMIterator::Init(nsIDOMRange* aRange)
     105                 : {
     106                 :   nsresult res;
     107               0 :   mIter = do_CreateInstance("@mozilla.org/content/post-content-iterator;1", &res);
     108               0 :   NS_ENSURE_SUCCESS(res, res);
     109               0 :   NS_ENSURE_TRUE(mIter, NS_ERROR_FAILURE);
     110               0 :   return mIter->Init(aRange);
     111                 : }
     112                 : 
     113                 : nsresult
     114               0 : nsDOMIterator::Init(nsIDOMNode* aNode)
     115                 : {
     116                 :   nsresult res;
     117               0 :   mIter = do_CreateInstance("@mozilla.org/content/post-content-iterator;1", &res);
     118               0 :   NS_ENSURE_SUCCESS(res, res);
     119               0 :   NS_ENSURE_TRUE(mIter, NS_ERROR_FAILURE);
     120               0 :   nsCOMPtr<nsIContent> content = do_QueryInterface(aNode);
     121               0 :   return mIter->Init(content);
     122                 : }
     123                 : 
     124                 : nsresult
     125               0 : nsDOMIterator::AppendList(nsBoolDomIterFunctor& functor,
     126                 :                           nsCOMArray<nsIDOMNode>& arrayOfNodes) const
     127                 : {
     128               0 :   nsCOMPtr<nsIDOMNode> node;
     129                 :   
     130                 :   // iterate through dom and build list
     131               0 :   while (!mIter->IsDone())
     132                 :   {
     133               0 :     node = do_QueryInterface(mIter->GetCurrentNode());
     134               0 :     NS_ENSURE_TRUE(node, NS_ERROR_NULL_POINTER);
     135                 : 
     136               0 :     if (functor(node))
     137                 :     {
     138               0 :       arrayOfNodes.AppendObject(node);
     139                 :     }
     140               0 :     mIter->Next();
     141                 :   }
     142               0 :   return NS_OK;
     143                 : }
     144                 : 
     145               0 : nsDOMSubtreeIterator::nsDOMSubtreeIterator()
     146                 : {
     147               0 : }
     148                 :     
     149               0 : nsDOMSubtreeIterator::~nsDOMSubtreeIterator()
     150                 : {
     151               0 : }
     152                 :     
     153                 : nsresult
     154               0 : nsDOMSubtreeIterator::Init(nsIDOMRange* aRange)
     155                 : {
     156                 :   nsresult res;
     157               0 :   mIter = do_CreateInstance("@mozilla.org/content/subtree-content-iterator;1", &res);
     158               0 :   NS_ENSURE_SUCCESS(res, res);
     159               0 :   NS_ENSURE_TRUE(mIter, NS_ERROR_FAILURE);
     160               0 :   return mIter->Init(aRange);
     161                 : }
     162                 : 
     163                 : /******************************************************************************
     164                 :  * some general purpose editor utils
     165                 :  *****************************************************************************/
     166                 : 
     167                 : bool 
     168               0 : nsEditorUtils::IsDescendantOf(nsIDOMNode *aNode, nsIDOMNode *aParent, PRInt32 *aOffset) 
     169                 : {
     170               0 :   NS_ENSURE_TRUE(aNode || aParent, false);
     171               0 :   if (aNode == aParent) return false;
     172                 :   
     173               0 :   nsCOMPtr<nsIDOMNode> parent, node = do_QueryInterface(aNode);
     174                 :   nsresult res;
     175                 :   
     176               0 :   do
     177                 :   {
     178               0 :     res = node->GetParentNode(getter_AddRefs(parent));
     179               0 :     NS_ENSURE_SUCCESS(res, false);
     180               0 :     if (parent == aParent) 
     181                 :     {
     182               0 :       if (aOffset)
     183                 :       {
     184               0 :         nsCOMPtr<nsIContent> pCon(do_QueryInterface(parent));
     185               0 :         nsCOMPtr<nsIContent> cCon(do_QueryInterface(node));
     186               0 :         if (pCon)
     187                 :         {
     188               0 :           *aOffset = pCon->IndexOf(cCon);
     189                 :         }
     190                 :       }
     191               0 :       return true;
     192                 :     }
     193               0 :     node = parent;
     194               0 :   } while (parent);
     195                 :   
     196               0 :   return false;
     197                 : }
     198                 : 
     199                 : bool
     200               0 : nsEditorUtils::IsLeafNode(nsIDOMNode *aNode)
     201                 : {
     202               0 :   bool hasChildren = false;
     203               0 :   if (aNode)
     204               0 :     aNode->HasChildNodes(&hasChildren);
     205               0 :   return !hasChildren;
     206                 : }
     207                 : 
     208                 : /******************************************************************************
     209                 :  * utility methods for drag/drop/copy/paste hooks
     210                 :  *****************************************************************************/
     211                 : 
     212                 : nsresult
     213               0 : nsEditorHookUtils::GetHookEnumeratorFromDocument(nsIDOMDocument *aDoc,
     214                 :                                                  nsISimpleEnumerator **aResult)
     215                 : {
     216               0 :   nsCOMPtr<nsIDocument> doc = do_QueryInterface(aDoc);
     217               0 :   NS_ENSURE_TRUE(doc, NS_ERROR_FAILURE);
     218                 : 
     219               0 :   nsCOMPtr<nsISupports> container = doc->GetContainer();
     220               0 :   nsCOMPtr<nsIDocShell> docShell = do_QueryInterface(container);
     221               0 :   nsCOMPtr<nsIClipboardDragDropHookList> hookObj = do_GetInterface(docShell);
     222               0 :   NS_ENSURE_TRUE(hookObj, NS_ERROR_FAILURE);
     223                 : 
     224               0 :   return hookObj->GetHookEnumerator(aResult);
     225                 : }
     226                 : 
     227                 : bool
     228               0 : nsEditorHookUtils::DoInsertionHook(nsIDOMDocument *aDoc, nsIDOMEvent *aDropEvent,  
     229                 :                                    nsITransferable *aTrans)
     230                 : {
     231               0 :   nsCOMPtr<nsISimpleEnumerator> enumerator;
     232               0 :   GetHookEnumeratorFromDocument(aDoc, getter_AddRefs(enumerator));
     233               0 :   NS_ENSURE_TRUE(enumerator, true);
     234                 : 
     235               0 :   bool hasMoreHooks = false;
     236               0 :   while (NS_SUCCEEDED(enumerator->HasMoreElements(&hasMoreHooks)) && hasMoreHooks)
     237                 :   {
     238               0 :     nsCOMPtr<nsISupports> isupp;
     239               0 :     if (NS_FAILED(enumerator->GetNext(getter_AddRefs(isupp))))
     240                 :       break;
     241                 : 
     242               0 :     nsCOMPtr<nsIClipboardDragDropHooks> override = do_QueryInterface(isupp);
     243               0 :     if (override)
     244                 :     {
     245               0 :       bool doInsert = true;
     246                 : #ifdef DEBUG
     247                 :       nsresult hookResult =
     248                 : #endif
     249               0 :       override->OnPasteOrDrop(aDropEvent, aTrans, &doInsert);
     250               0 :       NS_ASSERTION(NS_SUCCEEDED(hookResult), "hook failure in OnPasteOrDrop");
     251               0 :       NS_ENSURE_TRUE(doInsert, false);
     252                 :     }
     253                 :   }
     254                 : 
     255               0 :   return true;
     256                 : }

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