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1 // Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // Node set functions implementation |
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15 // |
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16 |
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17 #include <stdapis/libxml2/libxml2_globals.h> |
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18 #include <stdapis/libxml2/libxml2_xpath.h> |
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19 #include <stdapis/libxml2/libxml2_xpathinternals.h> |
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20 |
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21 #include <xml/dom/xmlengnodeset.h> |
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22 #include <xml/dom/xmlengnode.h> |
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23 #include "xmlengdomdefs.h" |
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24 #include <xml/utils/xmlengmem.h> |
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25 |
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26 #define THIS_NODESET (static_cast<xmlNodeSetPtr>(iInternal)) |
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27 // ----------------------------------------------------------------------------- |
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28 // Default constructor |
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29 // ----------------------------------------------------------------------------- |
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30 // |
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31 EXPORT_C RXmlEngNodeSet::RXmlEngNodeSet():iInternal(NULL) |
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32 { |
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33 } |
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34 |
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35 // ----------------------------------------------------------------------------- |
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36 // Frees any allocated resources for the RXmlEngNodeSet instance. |
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37 // |
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38 // @note All nodes referred to in a node set are "live", |
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39 // meaning that they are not copies of actual nodes in |
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40 // a document tree. <br> |
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41 // <b> The only exception for this are namespace declarations, |
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42 // which ARE COPIES AND ARE DESTROYED with a node set</b> |
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43 // ----------------------------------------------------------------------------- |
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44 // |
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45 EXPORT_C void RXmlEngNodeSet::Free() |
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46 { |
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47 // NOTE: namespace nodes are new objects (->next points to parent element) |
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48 // and should be destroyed; all other nodes are "live" and belong |
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49 // to the document tree (so, should not be deleted) |
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50 // xmlXPathNodeSetFreeNs(xmlNsPtr ns) is used for namespaces |
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51 if (!THIS_NODESET) |
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52 return; // nothing to free.. |
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53 xmlXPathFreeNodeSet(THIS_NODESET); |
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54 iInternal = NULL; |
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55 } |
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56 |
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57 // ----------------------------------------------------------------------------- |
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58 // @return Number of nodes in a node set |
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59 // ----------------------------------------------------------------------------- |
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60 // |
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61 EXPORT_C TInt RXmlEngNodeSet::Length() const |
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62 { |
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63 return THIS_NODESET ? THIS_NODESET->nodeNr : 0; |
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64 } |
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65 |
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66 // ----------------------------------------------------------------------------- |
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67 // Retrieves a node from node set by index |
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68 // |
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69 // @param aIndex Node index { 0 <= aIndex < Length() } |
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70 // ----------------------------------------------------------------------------- |
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71 // |
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72 EXPORT_C TXmlEngNode RXmlEngNodeSet::operator[]( |
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73 TInt aIndex) const |
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74 { |
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75 XE_ASSERT_DEBUG(THIS_NODESET && aIndex >= 0 && aIndex < THIS_NODESET->nodeNr); |
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76 return TXmlEngNode(THIS_NODESET->nodeTab[aIndex]); |
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77 } |
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78 |
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79 // ----------------------------------------------------------------------------- |
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80 // Checks whether aNode is in a resulting node set |
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81 // |
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82 // @return TRUE is node in the node set, FALSE otherwise |
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83 // ----------------------------------------------------------------------------- |
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84 // |
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85 EXPORT_C TBool RXmlEngNodeSet::Contains( |
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86 TXmlEngNode aNode) const |
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87 { |
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88 return xmlXPathNodeSetContains(THIS_NODESET, INTERNAL_NODEPTR(aNode)); |
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89 } |
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90 |
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91 // ----------------------------------------------------------------------------- |
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92 // Initializes a RXmlEngNodeSet instance as being "empty" |
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93 // |
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94 // This method is used when preparing node sets that will |
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95 // be used with RXmlEngXPathExpression::EvaluateWithDependenciesL(TXmlEngNode,RXmlEngNodeSet&) |
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96 // and TXmlEngXPathEvaluator::EvaluateWithDependenciesL(aExpression,aContextNode,aResolver,aDependents) |
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97 // ----------------------------------------------------------------------------- |
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98 // |
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99 EXPORT_C void RXmlEngNodeSet::InitializeL() |
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100 { |
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101 Free(); |
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102 // create the libxml nodeset "object" |
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103 iInternal = xmlXPathNodeSetCreate(NULL); |
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104 OOM_IF_NULL(iInternal); |
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105 } |
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106 // ----------------------------------------------------------------------------- |
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107 // Constructor |
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108 // ----------------------------------------------------------------------------- |
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109 // |
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110 RXmlEngNodeSet::RXmlEngNodeSet(void* aData):iInternal(aData) |
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111 { |
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112 } |