Qt 4.8
qinsertioniterator.cpp
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41 
42 
43 #include "qinsertioniterator_p.h"
44 
46 
47 using namespace QPatternist;
48 
50  const xsInteger pos,
51  const Item::Iterator::Ptr &inserts)
52  : m_target(target),
53  m_insertPos(pos),
54  m_inserts(inserts),
55  m_position(0),
56  m_isInserting(pos == 1)
57 {
58  Q_ASSERT(target);
59  Q_ASSERT(inserts);
60  Q_ASSERT(m_insertPos >= 1);
61 }
62 
64 {
65  if(m_isInserting)
66  {
67  m_current = m_inserts->next();
68 
69  if(m_current)
70  {
71  ++m_position;
72  return m_current;
73  }
74  }
75  else if(m_position == (m_insertPos - 1) && !m_isInserting)
76  { /* Entered only the first time insertion starts. */
77  m_isInserting = true;
78  return next();
79  }
80 
81  ++m_position;
82  m_current = m_target->next();
83 
84  if(m_current)
85  return m_current;
86  else if(m_inserts->position() == -1) /* We're at the end of the both iterators. */
87  {
88  m_position = -1;
89  m_current.reset();
90  return Item();
91  }
92 
93  /* Insert the insertion iterator, since it's still left. */
94  Q_ASSERT(m_target->position() < m_insertPos);
95  m_isInserting = true;
96  m_current = m_inserts->next();
97 
98  if(m_current)
99  return m_current;
100  else
101  {
102  /* m_current is already null, so no need to reset it. */
103  m_position = -1;
104  return Item();
105  }
106 }
107 
109 {
110  return m_target->count() + m_inserts->count();
111 }
112 
114 {
115  return m_current;
116 }
117 
119 {
120  return m_position;
121 }
122 
124 {
125  return Item::Iterator::Ptr(new InsertionIterator(m_target->copy(), m_insertPos, m_inserts->copy()));
126 }
127 
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
qint64 xsInteger
The QExplicitlySharedDataPointer class represents a pointer to an explicitly shared object...
Definition: qshareddata.h:136
#define Q_ASSERT(cond)
Definition: qglobal.h:1823
const Item::Iterator::Ptr m_target
virtual Item current() const
Returns the current item in the sequence.
QExplicitlySharedDataPointer< QAbstractXmlForwardIterator< Item > > Ptr
A smart pointer wrapping an instance of a QAbstractXmlForwardIterator subclass.
const Item::Iterator::Ptr m_inserts
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition: qglobal.h:89
virtual Item::Iterator::Ptr copy() const
Copies this QAbstractXmlForwardIterator and returns the copy.
The namespace for the internal API of QtXmlPatterns.
virtual xsInteger count()
Determines the number of items this QAbstractXmlForwardIterator represents.
virtual xsInteger position() const
Returns the current position in the sequence represented by this.
Represents an item in the XPath 2.0 Data Model.
Definition: qitem_p.h:182
virtual Item next()
Returns the next item in the sequence, or a null object if the end has been reached.
InsertionIterator(const Item::Iterator::Ptr &target, const xsInteger position, const Item::Iterator::Ptr &insertIterator)