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39
40#include "qitem_p.h"
41
42#include "qintersectiterator_p.h"
43
44QT_BEGIN_NAMESPACE
45
46using namespace QPatternist;
47
48IntersectIterator::IntersectIterator(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
59Item IntersectIterator::next()
60{
61 if(!m_node1 || !m_node2)
62 return closedExit();
63
64 do
65 {
66 if(m_node1.asNode().model() == m_node2.asNode().model())
67 {
68 switch(m_node1.asNode().compareOrder(other: m_node2.asNode()))
69 {
70 case QXmlNodeModelIndex::Precedes:
71 {
72 m_node1 = m_it1->next();
73 break;
74 }
75 case QXmlNodeModelIndex::Follows:
76 {
77 m_node2 = m_it2->next();
78 break;
79 }
80 default:
81 {
82 m_current = m_node2;
83 m_node1 = m_it1->next();
84 m_node2 = m_it2->next();
85 ++m_position;
86 return m_current;
87 }
88 }
89 }
90 else
91 m_node2 = m_it2->next();
92 }
93 while(m_node1 && m_node2);
94
95 return Item();
96}
97
98Item IntersectIterator::current() const
99{
100 return m_current;
101}
102
103xsInteger IntersectIterator::position() const
104{
105 return m_position;
106}
107
108Item::Iterator::Ptr IntersectIterator::copy() const
109{
110 return Item::Iterator::Ptr(new IntersectIterator(m_it1->copy(), m_it2->copy()));
111}
112
113QT_END_NAMESPACE
114

source code of qtxmlpatterns/src/xmlpatterns/iterators/qintersectiterator.cpp