QPatternist::PrecedingIterator Class Reference

Implements axis preceding for the AccelTree. More...

#include <qacceliterators_p.h>

Inheritance diagram for QPatternist::PrecedingIterator:

Public Functions
virtual QXmlNodeModelIndex::Iterator::Ptr	copy () const
	Copies this QAbstractXmlForwardIterator and returns the copy. More...
virtual QXmlNodeModelIndex	next ()
	Returns the next item in the sequence, or a null object if the end has been reached. More...
	PrecedingIterator (const AccelTree *const doc, const AccelTree::PreNumber pre)
Public Functions inherited from QPatternist::AccelIterator
virtual QXmlNodeModelIndex	current () const
	Returns the current item in the sequence. More...
virtual xsInteger	position () const
	Returns the current position in the sequence represented by this. More...
Public Functions inherited from QAbstractXmlForwardIterator< T >
virtual qint64	count ()
	Determines the number of items this QAbstractXmlForwardIterator represents. More...
virtual bool	isEmpty ()
	Returns true if the sequence is empty. More...
virtual T	last ()
	Returns the item at the end of this QAbstractXmlForwardIterator. More...
	QAbstractXmlForwardIterator ()
	Default constructor. More...
virtual qint64	sizeHint () const
	Gives a hint to the size of the contained sequence. More...
virtual QList< T >	toList ()
	Performs a copy of this QAbstractXmlForwardIterator(with copy()), and returns its items in a QList. More...
virtual QAbstractXmlForwardIterator< T >::Ptr	toReversed ()
	Returns a reverse iterator for the sequence. More...
virtual	~QAbstractXmlForwardIterator ()
	Destructor. More...
Public Functions inherited from QSharedData
	QSharedData ()
	Constructs a QSharedData object with a reference count of 0. More...
	QSharedData (const QSharedData &)
	Constructs a QSharedData object with reference count 0. More...

Properties
const AccelTree::PreNumber	m_postNumber

Additional Inherited Members
Public Types inherited from QAbstractXmlForwardIterator< T >
typedef QList< QExplicitlySharedDataPointer< QAbstractXmlForwardIterator< T > > >	List
	A QList containing QAbstractXmlForwardIterator::Ptr instances. More...
typedef QExplicitlySharedDataPointer< QAbstractXmlForwardIterator< T > >	Ptr
	A smart pointer wrapping an instance of a QAbstractXmlForwardIterator subclass. More...
typedef QVector< QExplicitlySharedDataPointer< QAbstractXmlForwardIterator< T > > >	Vector
	A QVector containing QAbstractXmlForwardIterator::Ptr instances. More...
Public Variables inherited from QSharedData
QAtomicInt	ref
Protected Functions inherited from QPatternist::AccelIterator
	AccelIterator (const AccelTree *const doc, const AccelTree::PreNumber pre, const AccelTree::PreNumber currentPre)
QXmlNodeModelIndex	closedExit ()
Protected Variables inherited from QPatternist::AccelIterator
QXmlNodeModelIndex	m_current
AccelTree::PreNumber	m_currentPre
const AccelTree *const	m_document
xsInteger	m_position
const AccelTree::PreNumber	m_preNumber
Related Functions inherited from QAbstractXmlForwardIterator< T >
template<typename TResult , typename TSource , typename TMapper >
static QAbstractXmlForwardIterator< TResult >::Ptr	makeSequenceMappingIterator (const TMapper &mapper, const QExplicitlySharedDataPointer< QAbstractXmlForwardIterator< TSource > > &source, const DynamicContext::Ptr &context)
	An object generator for SequenceMappingIterator. More...
bool	qIsForwardIteratorEnd (const T &unit)
	The Callback QAbstractXmlForwardIterator uses for determining whether unit is the end of a sequence. More...

Detailed Description

Implements axis preceding for the AccelTree.

Author

Frans Englich frans.nosp@m..eng.nosp@m.lich@.nosp@m.noki.nosp@m.a.com

Definition at line 367 of file qacceliterators_p.h.

Constructors and Destructors

PrecedingIterator()

QPatternist::PrecedingIterator::PrecedingIterator ( const AccelTree *const  doc, const AccelTree::PreNumber  pre  )

inline

@ pre must have at least one child.

Definition at line 373 of file qacceliterators_p.h.

                                                               : AccelIterator(doc, pre,
                                                                                 pre - 1 /* currentPre */)
                                                                 , m_postNumber(m_document->postNumber(m_preNumber))
        {
        }

Functions

copy()

QXmlNodeModelIndex::Iterator::Ptr PrecedingIterator::copy ( ) const

virtual

Copies this QAbstractXmlForwardIterator and returns the copy.

Warning

This function is not part of the public interface.

A copy and the original instance are completely independent of each other. Because evaluating an QAbstractXmlForwardIterator modifies it, one should always use a copy when an QAbstractXmlForwardIterator needs to be used several times.

Reimplemented from QAbstractXmlForwardIterator< T >.

Definition at line 122 of file qacceliterators.cpp.

{
    return QXmlNodeModelIndex::Iterator::Ptr(new PrecedingIterator(m_document, m_preNumber));
}

next()

QXmlNodeModelIndex PrecedingIterator::next ( )

virtual

Returns the next item in the sequence, or a null object if the end has been reached.

Implements QAbstractXmlForwardIterator< T >.

Definition at line 89 of file qacceliterators.cpp.

{
    if(m_currentPre == -1)
        return closedExit();

    /* We skip ancestors and attributes and take into account that they can be intermixed. If one
     * skips them in two separate loops, one can end up with skipping all the attributes to then
     * be positioned at an ancestor(which will be accepted because the ancestor loop was before the
     * attributes loop).  */
    while(m_document->kind(m_currentPre) == QXmlNodeModelIndex::Attribute ||
          m_document->postNumber(m_currentPre) > m_postNumber)
    {
        --m_currentPre;
        if(m_currentPre == -1)
            return closedExit();
    }

    if(m_currentPre == -1)
    {
        m_currentPre = -1;
        return closedExit();
    }

    /* Phew, m_currentPre is now 1) not an ancestor; and
     * 2) not an attribute; and 3) preceds the context node. */

    m_current = m_document->createIndex(m_currentPre);
    ++m_position;
    --m_currentPre;

    return m_current;
}

Properties

m_postNumber

const AccelTree::PreNumber QPatternist::PrecedingIterator::m_postNumber

private

Definition at line 384 of file qacceliterators_p.h.

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The documentation for this class was generated from the following files:

• /src/xmlpatterns/acceltree/qacceliterators_p.h
• /src/xmlpatterns/acceltree/qacceliterators.cpp