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39
40 #include "qitem_p.h"
41
42 #include "qunioniterator_p.h"
43
44 QT_BEGIN_NAMESPACE
45
46 using namespace QPatternist;
47
UnionIterator(const Item::Iterator::Ptr & it1,const Item::Iterator::Ptr & it2)48 UnionIterator::UnionIterator(const Item::Iterator::Ptr &it1,
49 const Item::Iterator::Ptr &it2) : m_it1(it1),
50 m_it2(it2),
51 m_position(0),
52 m_node1(m_it1->next()),
53 m_node2(m_it2->next())
54 {
55 Q_ASSERT(m_it1);
56 Q_ASSERT(m_it2);
57 }
58
next()59 Item UnionIterator::next()
60 {
61 ++m_position;
62 if(m_node1 && m_node2)
63 {
64 if(m_node1.asNode().model() != m_node2.asNode().model())
65 {
66 m_current = m_node1;
67 m_node1 = m_it1->next();
68 return m_current;
69 }
70
71 switch(m_node1.asNode().compareOrder(m_node2.asNode()))
72 {
73 case QXmlNodeModelIndex::Precedes:
74 {
75 m_current = m_node1;
76 m_node1 = m_it1->next();
77 return m_current;
78 }
79 case QXmlNodeModelIndex::Follows:
80 {
81 m_current = m_node2;
82 m_node2 = m_it2->next();
83 return m_current;
84 }
85 default:
86 {
87 m_current = m_node2;
88 m_node1 = m_it1->next();
89 m_node2 = m_it2->next();
90 return m_current;
91 }
92 }
93 }
94
95 if(m_node1)
96 {
97 m_current = m_node1;
98 m_node1 = m_it1->next();
99 return m_current;
100 }
101
102 if(m_node2)
103 {
104 m_current = m_node2;
105 m_node2 = m_it2->next();
106 return m_current;
107 }
108
109 m_current.reset();
110 m_position = -1;
111 return Item();
112 }
113
current() const114 Item UnionIterator::current() const
115 {
116 return m_current;
117 }
118
position() const119 xsInteger UnionIterator::position() const
120 {
121 return m_position;
122 }
123
copy() const124 Item::Iterator::Ptr UnionIterator::copy() const
125 {
126 return Item::Iterator::Ptr(new UnionIterator(m_it1->copy(), m_it2->copy()));
127 }
128
129 QT_END_NAMESPACE
130