112 lines
3.4 KiB
C++
112 lines
3.4 KiB
C++
/*************************************************************************
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* $RCSfile: ConstrainedIterator.hxx,v $
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*
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* $Revision: 1.3 $
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*
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* last change: $Author: rt $ $Date: 2005-09-09 06:29:10 $
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*
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* The Contents of this file are made available subject to
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* the terms of GNU Lesser General Public License Version 2.1.
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*
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*
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* GNU Lesser General Public License Version 2.1
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* =============================================
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* Copyright 2005 by Sun Microsystems, Inc.
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* 901 San Antonio Road, Palo Alto, CA 94303, USA
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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************************************************************************/
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#ifndef SD_TOOLPANEL_CONSTRAINED_ITERATOR_HXX
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#define SD_TOOLPANEL_CONSTRAINED_ITERATOR_HXX
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#include <iterator>
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namespace sd { namespace toolpanel {
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template <class Container>
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class Constraint
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{
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public:
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virtual bool operator() (
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const Container& rContainer,
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const Container::iterator& rIterator) const = 0;
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};
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/** This iterator is a bidirectional iterator with something of random
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access thrown in. It uses a constraint object to jump over
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elements in the underlying container that do not meet the
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constraint.
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*/
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template <class Container>
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class ConstrainedIterator
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: public ::std::bidirectional_iterator_tag
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{
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public:
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typedef Container::value_type value_type;
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typedef value_type& reference;
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typedef const value_type& const_reference;
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ConstrainedIterator (void);
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ConstrainedIterator (
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const Container& rContainer,
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const Container::iterator& rIterator);
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ConstrainedIterator (
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const Container& rContainer,
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const Container::iterator& rIterator,
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const Constraint<Container>& pConstraint);
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ConstrainedIterator (
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const ConstrainedIterator& rIterator);
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ConstrainedIterator& operator= (
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const ConstrainedIterator& aIterator);
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reference operator* (void);
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const_reference operator* (void) const;
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reference operator-> (void);
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const_reference operator-> (void) const;
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bool operator== (const ConstrainedIterator& aIterator) const;
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bool operator!= (const ConstrainedIterator& aIterator) const;
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ConstrainedIterator& operator++ (void);
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ConstrainedIterator operator++ (int);
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ConstrainedIterator& operator-- (void);
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ConstrainedIterator operator-- (int);
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ConstrainedIterator operator+ (int nValue) const;
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ConstrainedIterator operator- (int nValue) const;
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private:
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const Container* mpContainer;
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Container::iterator maIterator;
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const Constraint<Container>* mpConstraint;
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void AdvanceToNextValidElement (void);
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void AdvanceToPreviousValidElement (void);
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};
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} } // end of namespace ::sd::toolpanel
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#endif
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