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39
40
41#include "qinsertioniterator_p.h"
42
43QT_BEGIN_NAMESPACE
44
45using namespace QPatternist;
46
47InsertionIterator::InsertionIterator(const Item::Iterator::Ptr &target,
48 const xsInteger pos,
49 const Item::Iterator::Ptr &inserts)
50 : m_target(target),
51 m_insertPos(pos),
52 m_inserts(inserts),
53 m_position(0),
54 m_isInserting(pos == 1)
55{
56 Q_ASSERT(target);
57 Q_ASSERT(inserts);
58 Q_ASSERT(m_insertPos >= 1);
59}
60
61Item InsertionIterator::next()
62{
63 if(m_isInserting)
64 {
65 m_current = m_inserts->next();
66
67 if(m_current)
68 {
69 ++m_position;
70 return m_current;
71 }
72 }
73 else if(m_position == (m_insertPos - 1) && !m_isInserting)
74 { /* Entered only the first time insertion starts. */
75 m_isInserting = true;
76 return next();
77 }
78
79 ++m_position;
80 m_current = m_target->next();
81
82 if(m_current)
83 return m_current;
84 else if(m_inserts->position() == -1) /* We're at the end of the both iterators. */
85 {
86 m_position = -1;
87 m_current.reset();
88 return Item();
89 }
90
91 /* Insert the insertion iterator, since it's still left. */
92 Q_ASSERT(m_target->position() < m_insertPos);
93 m_isInserting = true;
94 m_current = m_inserts->next();
95
96 if(m_current)
97 return m_current;
98 else
99 {
100 /* m_current is already null, so no need to reset it. */
101 m_position = -1;
102 return Item();
103 }
104}
105
106xsInteger InsertionIterator::count()
107{
108 return m_target->count() + m_inserts->count();
109}
110
111Item InsertionIterator::current() const
112{
113 return m_current;
114}
115
116xsInteger InsertionIterator::position() const
117{
118 return m_position;
119}
120
121Item::Iterator::Ptr InsertionIterator::copy() const
122{
123 return Item::Iterator::Ptr(new InsertionIterator(m_target->copy(), m_insertPos, m_inserts->copy()));
124}
125
126QT_END_NAMESPACE
127

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