| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
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| ** |
| ** This file is part of the QtXmlPatterns module of the Qt Toolkit. |
| ** |
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| ****************************************************************************/ |
| |
| |
| #include "qinsertioniterator_p.h" |
| |
| QT_BEGIN_NAMESPACE |
| |
| using namespace QPatternist; |
| |
| InsertionIterator::InsertionIterator(const Item::Iterator::Ptr &target, |
| const xsInteger pos, |
| const Item::Iterator::Ptr &inserts) |
| : m_target(target), |
| m_insertPos(pos), |
| m_inserts(inserts), |
| m_position(0), |
| m_isInserting(pos == 1) |
| { |
| Q_ASSERT(target); |
| Q_ASSERT(inserts); |
| Q_ASSERT(m_insertPos >= 1); |
| } |
| |
| Item InsertionIterator::next() |
| { |
| if(m_isInserting) |
| { |
| m_current = m_inserts->next(); |
| |
| if(m_current) |
| { |
| ++m_position; |
| return m_current; |
| } |
| } |
| else if(m_position == (m_insertPos - 1) && !m_isInserting) |
| { /* Entered only the first time insertion starts. */ |
| m_isInserting = true; |
| return next(); |
| } |
| |
| ++m_position; |
| m_current = m_target->next(); |
| |
| if(m_current) |
| return m_current; |
| else if(m_inserts->position() == -1) /* We're at the end of the both iterators. */ |
| { |
| m_position = -1; |
| m_current.reset(); |
| return Item(); |
| } |
| |
| /* Insert the insertion iterator, since it's still left. */ |
| Q_ASSERT(m_target->position() < m_insertPos); |
| m_isInserting = true; |
| m_current = m_inserts->next(); |
| |
| if(m_current) |
| return m_current; |
| else |
| { |
| /* m_current is already null, so no need to reset it. */ |
| m_position = -1; |
| return Item(); |
| } |
| } |
| |
| xsInteger InsertionIterator::count() |
| { |
| return m_target->count() + m_inserts->count(); |
| } |
| |
| Item InsertionIterator::current() const |
| { |
| return m_current; |
| } |
| |
| xsInteger InsertionIterator::position() const |
| { |
| return m_position; |
| } |
| |
| Item::Iterator::Ptr InsertionIterator::copy() const |
| { |
| return Item::Iterator::Ptr(new InsertionIterator(m_target->copy(), m_insertPos, m_inserts->copy())); |
| } |
| |
| QT_END_NAMESPACE |