101 lines
3.5 KiB
C++
101 lines
3.5 KiB
C++
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/*************************************************************************
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*
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* $RCSfile: expressionnode.hxx,v $
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*
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* $Revision: 1.2 $
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*
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* last change: $Author: rt $ $Date: 2004-11-26 19:16:22 $
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*
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* The Contents of this file are made available subject to the terms of
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* either of the following licenses
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*
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* - GNU Lesser General Public License Version 2.1
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* - Sun Industry Standards Source License Version 1.1
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*
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* Sun Microsystems Inc., October, 2000
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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 2000 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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* Sun Industry Standards Source License Version 1.1
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* =================================================
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* The contents of this file are subject to the Sun Industry Standards
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* Source License Version 1.1 (the "License"); You may not use this file
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* except in compliance with the License. You may obtain a copy of the
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* License at http://www.openoffice.org/license.html.
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*
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* Software provided under this License is provided on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
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* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
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* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
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* See the License for the specific provisions governing your rights and
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* obligations concerning the Software.
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*
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* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
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*
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* Copyright: 2000 by Sun Microsystems, Inc.
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*
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* All Rights Reserved.
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*
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* Contributor(s): _______________________________________
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*
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*
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************************************************************************/
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#ifndef _SLIDESHOW_EXPRESSIONNODE_HXX
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#define _SLIDESHOW_EXPRESSIONNODE_HXX
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#include <animationfunction.hxx>
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/* Definition of ExpressionNode interface */
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namespace presentation
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{
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namespace internal
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{
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/** Refinement of AnimationFunction
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This interface is used by the SMIL function parser, to
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collapse constant values into precalculated, single nodes.
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*/
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class ExpressionNode : public AnimationFunction
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{
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public:
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/** Predicate whether this node is constant.
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This predicate returns true, if this node is
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neither time- nor ViewInfo dependent. This allows
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for certain obtimizations, i.e. not the full
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expression tree needs be represented by
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ExpressionNodes.
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@returns true, if this node is neither time- nor
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ViewInfo dependent
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*/
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virtual bool isConstant() const = 0;
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};
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typedef ::boost::shared_ptr< ExpressionNode > ExpressionNodeSharedPtr;
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}
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}
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#endif /* _SLIDESHOW_EXPRESSIONNODE_HXX */
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