LCOV - code coverage report
Current view: directory - accessible/src/base - nsAccTreeWalker.h (source / functions) Found Hit Coverage
Test: app.info Lines: 2 0 0.0 %
Date: 2012-06-02 Functions: 1 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) 2003
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *  Aaron Leventhal <aaronleventhal@moonset.net> (original author)
      24                 :  *  Alexander Surkov <surkov.alexander@gmail.com>
      25                 :  *
      26                 :  * Alternatively, the contents of this file may be used under the terms of
      27                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      28                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      29                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      30                 :  * of those above. If you wish to allow use of your version of this file only
      31                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      32                 :  * use your version of this file under the terms of the MPL, indicate your
      33                 :  * decision by deleting the provisions above and replace them with the notice
      34                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      35                 :  * the provisions above, a recipient may use your version of this file under
      36                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      37                 :  *
      38                 :  * ***** END LICENSE BLOCK ***** */
      39                 : 
      40                 : #ifndef _nsAccTreeWalker_H_
      41                 : #define _nsAccTreeWalker_H_
      42                 : 
      43                 : #include "nsAutoPtr.h"
      44                 : #include "nsIContent.h"
      45                 : 
      46                 : class nsAccessible;
      47                 : class nsDocAccessible;
      48                 : struct WalkState;
      49                 : 
      50                 : /**
      51                 :  * This class is used to walk the DOM tree to create accessible tree.
      52                 :  */
      53                 : class nsAccTreeWalker
      54                 : {
      55                 : public:
      56                 :   nsAccTreeWalker(nsDocAccessible* aDoc, nsIContent* aNode, 
      57                 :                   bool aWalkAnonymousContent, bool aWalkCache = false);
      58                 :   virtual ~nsAccTreeWalker();
      59                 : 
      60                 :   /**
      61                 :    * Return the next child accessible.
      62                 :    *
      63                 :    * @note Returned accessible is bound to the document, if the accessible is
      64                 :    *       rejected during tree creation then the caller should be unbind it
      65                 :    *       from the document.
      66                 :    */
      67               0 :   inline nsAccessible* NextChild()
      68                 :   {
      69               0 :     return NextChildInternal(false);
      70                 :   }
      71                 : 
      72                 : private:
      73                 : 
      74                 :   /**
      75                 :    * Return the next child accessible.
      76                 :    *
      77                 :    * @param  aNoWalkUp  [in] specifies the walk direction, true means we
      78                 :    *                     shouldn't go up through the tree if we failed find
      79                 :    *                     accessible children.
      80                 :    */
      81                 :   nsAccessible* NextChildInternal(bool aNoWalkUp);
      82                 : 
      83                 :   /**
      84                 :    * Create new state for the given node and push it on top of stack.
      85                 :    *
      86                 :    * @note State stack is used to navigate up/down the DOM subtree during
      87                 :    *        accessible children search.
      88                 :    */
      89                 :   bool PushState(nsIContent *aNode);
      90                 : 
      91                 :   /**
      92                 :    * Pop state from stack.
      93                 :    */
      94                 :   void PopState();
      95                 : 
      96                 :   nsDocAccessible* mDoc;
      97                 :   PRInt32 mChildFilter;
      98                 :   bool mWalkCache;
      99                 :   WalkState* mState;
     100                 : };
     101                 : 
     102                 : #endif 

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