1 // Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 // Node container implementation

    15 //

    16 

    17 #include <xml/utils/xmlengmem.h>

    18 #include "xmlengownednodescontainer.h"

    19 #include "xmlengdomdefs.h"

    20 #include <stdapis/libxml2/libxml2_tree.h>

    21 #include <stdapis/libxml2/libxml2_globals.h>

    22 

    23 // --------------------------------------------------------------------------------------

    24 // Creates an instance of CXmlEngOwnedNodesContainer

    25 // --------------------------------------------------------------------------------------

    26 //

    27 CXmlEngOwnedNodesContainer* CXmlEngOwnedNodesContainer::NewL()

    28     {

    29     CXmlEngOwnedNodesContainer* obj = new (ELeave) CXmlEngOwnedNodesContainer();

    30     obj->iNodes = NULL;

    31     obj->iLast = NULL;

    32     obj->iCount = 0;

    33     return obj;

    34     }

    35 

    36 CXmlEngOwnedNodesContainer::~CXmlEngOwnedNodesContainer()

    37     {

    38     }

    39 // --------------------------------------------------------------------------------------

    40 // Searches for a node in the list

    41 //

    42 // @param   aNode Pointer to a libxml2 node

    43 // @return Index in the list of nodes [0; iCount-1] or iCount if not found

    44 // --------------------------------------------------------------------------------------

    45 //

    46 TUint CXmlEngOwnedNodesContainer::Lookup(xmlNodePtr aNode)

    47     {

    48     TUint i = 0;

    49     xmlNodePtr tmp = iNodes;

    50     for(; tmp; tmp = tmp->next, i++)

    51         if(tmp == aNode)

    52             return i;

    53     return iCount;

    54     }

    55 

    56 // --------------------------------------------------------------------------------------

    57 // Performs clean up of the list

    58 // --------------------------------------------------------------------------------------

    59 //

    60 void CXmlEngOwnedNodesContainer::RemoveAll()

    61     {

    62     iNodes = NULL;

    63     iCount = 0;

    64     }

    65 

    66 // --------------------------------------------------------------------------------------

    67 // Performs clean up of all owned nodes:

    68 // xmlFreeNode is called on every contained pointer

    69 // --------------------------------------------------------------------------------------

    70 //

    71 void CXmlEngOwnedNodesContainer::FreeAll()

    72     {

    73     xmlNodePtr tmp = iNodes;

    74     xmlNodePtr ptr;

    75     for(;tmp;)

    76         {

    77         ptr = tmp;

    78         tmp = tmp->next;

    79         if(ptr)

    80             xmlFreeNode(ptr);

    81         }

    82     iNodes = NULL;

    83     iCount = 0;

    84     }

    85 

    86 

    87 // --------------------------------------------------------------------------------------

    88 // Adds an owned node.

    89 //

    90 // @param aNode  A pointer to some node to be added into the container

    91 //

    92 // @note This method does not check whether the pointer is already in the container

    93 // @note In OOM situation the node is destroyed before leave occurs

    94 // --------------------------------------------------------------------------------------

    95 //

    96 void CXmlEngOwnedNodesContainer::Add(

    97     xmlNodePtr aNode )

    98     {

    99     if(iLast)

   100         {

   101         iLast->next = aNode;

   102         aNode->prev = iLast;        

   103         }

   104     else

   105         {

   106         iNodes = iLast = aNode;

   107         }

   108     iLast = aNode;

   109     ++iCount;

   110     }

   111 

   112 // --------------------------------------------------------------------------------------

   113 // Excludes node pointer from the list of owned nodes.

   114 // 

   115 // does nothing if provided node pointer is not on the list.

   116 // --------------------------------------------------------------------------------------

   117 //

   118 void CXmlEngOwnedNodesContainer::Remove(

   119     xmlNodePtr aNode )

   120     {

   121     if(aNode == iLast)

   122         {

   123         iLast = aNode->prev;

   124         }

   125     else

   126         {

   127         aNode->next->prev = aNode->prev;    

   128         }

   129     if(aNode == iNodes)

   130         {

   131         iNodes = aNode->next;

   132         }

   133     else

   134         {

   135         aNode->prev->next = aNode->next;

   136         }    

   137     

   138     aNode->prev = NULL;

   139     aNode->next = NULL;

   140     --iCount;

   141     }