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42 #include "qdaytimeduration_p.h"
48 using namespace QPatternist;
50 Focus::Focus(const DynamicContext::Ptr &prevContext) : DelegatingDynamicContext(prevContext),
51 m_contextSizeCached(-1)
53 Q_ASSERT(prevContext);
54 Q_ASSERT(prevContext != this);
57 xsInteger Focus::contextPosition() const
59 Q_ASSERT(m_focusIterator);
60 return m_focusIterator->position();
63 Item Focus::contextItem() const
65 Q_ASSERT(m_focusIterator);
66 return m_focusIterator->current();
69 xsInteger Focus::contextSize()
71 Q_ASSERT(m_focusIterator);
72 if(m_contextSizeCached == -1)
73 m_contextSizeCached = m_focusIterator->copy()->count();
75 Q_ASSERT_X(m_contextSizeCached == m_focusIterator->copy()->count(), Q_FUNC_INFO,
76 "If our cache is not the same as the real count, something is wrong.");
78 return m_contextSizeCached;
81 void Focus::setFocusIterator(const Item::Iterator::Ptr &it)
87 Item::Iterator::Ptr Focus::focusIterator() const
89 return m_focusIterator;
92 Item Focus::currentItem() const
94 /* In the case that there is no top level expression that creates a focus,
95 * fn:current() should return the focus. This logic achieves this.
96 * Effectively we traverse up our "context stack" through recursion, and
97 * start returning when we've found the top most focus. */
99 const Item current(m_prevContext->currentItem());
102 return m_focusIterator->current();