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/*************************************************************************
*
* $RCSfile: smilfunctionparser.hxx,v $
*
* $Revision: 1.2 $
*
* last change: $Author: rt $ $Date: 2004-11-26 19:21:37 $
*
* The Contents of this file are made available subject to the terms of
* either of the following licenses
*
* - GNU Lesser General Public License Version 2.1
* - Sun Industry Standards Source License Version 1.1
*
* Sun Microsystems Inc., October, 2000
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2000 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*
* Sun Industry Standards Source License Version 1.1
* =================================================
* The contents of this file are subject to the Sun Industry Standards
* Source License Version 1.1 (the "License"); You may not use this file
* except in compliance with the License. You may obtain a copy of the
* License at http://www.openoffice.org/license.html.
*
* Software provided under this License is provided on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
* See the License for the specific provisions governing your rights and
* obligations concerning the Software.
*
* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
*
* Copyright: 2000 by Sun Microsystems, Inc.
*
* All Rights Reserved.
*
* Contributor(s): _______________________________________
*
*
************************************************************************/
#ifndef _SLIDESHOW_SMILFUNCTIONPARSER_HXX
#define _SLIDESHOW_SMILFUNCTIONPARSER_HXX
#include <expressionnode.hxx>
#include <slideshowexceptions.hxx>
#ifndef _BGFX_RANGE_B2DRECTANGLE_HXX
#include <basegfx/range/b2drectangle.hxx>
#endif
namespace rtl
{
class OUString;
}
/* Definition of SmilFunctionParser class */
namespace presentation
{
namespace internal
{
class SmilFunctionParser
{
public:
/** Parse a string containing a SMIL value.
This method parses a string representing
a fixed value (i.e. a value that does not
change by time). Due to the dynamic view
capabilities of the presentation engine,
this value can sometimes only be determined
during runtime of the animation (because
e.g. mixed screen/view coordinates are
involved), and is thus still returned as an
ExpressionNode object. An example for
such a case is the "Width+1.0" string, which
contains the width of the shape in user
coordinate space, and the screen width
in device coordinate space.
The following grammar is accepted by this method:
<code>
identifier = 'pi'|'e'|'X'|'Y'|'Width'|'Height'
function = 'abs'|'sqrt'|'sin'|'cos'|'tan'|'atan'|'acos'|'asin'|'exp'|'log'
basic_expression =
number |
identifier |
function '(' additive_expression ')' |
'(' additive_expression ')'
unary_expression =
'-' basic_expression |
basic_expression
multiplicative_expression =
unary_expression ( ( '*' unary_expression )* |
( '/' unary_expression )* )
additive_expression =
multiplicative_expression ( ( '+' multiplicative_expression )* |
( '-' multiplicative_expression )* )
</code>
@param rSmilValue
The string to parse
@param rRelativeShapeBounds
The bounds of the shape this SMIL value is to be
evaluated for. The bounds must be <em>relative</em> to
the page the shape is part of, i.e. within the [0,1]
range. This is necessary, since the string might
contain symbolic references to the shape bounding box.
@throws ParseError if an invalid expression is given.
@return the generated function object.
*/
static ExpressionNodeSharedPtr parseSmilValue( const ::rtl::OUString& rSmilValue,
const ::basegfx::B2DRectangle& rRelativeShapeBounds ); // throw ParseError
/** Parse a string containing a SMIL function.
This method parses a string representing
a possibly time-varying SMIL function.
The following grammar is accepted by this method:
<code>
identifier = 't'|'pi'|'e'|'X'|'Y'|'Width'|'Height'
function = 'abs'|'sqrt'|'sin'|'cos'|'tan'|'atan'|'acos'|'asin'|'exp'|'log'
basic_expression =
number |
identifier |
function '(' additive_expression ')' |
'(' additive_expression ')'
unary_expression =
'-' basic_expression |
basic_expression
multiplicative_expression =
unary_expression ( ( '*' unary_expression )* |
( '/' unary_expression )* )
additive_expression =
multiplicative_expression ( ( '+' multiplicative_expression )* |
( '-' multiplicative_expression )* )
</code>
@param rSmilFunction
The string to parse
@param rRelativeShapeBounds
The bounds of the shape this SMIL value is to be
evaluated for. The bounds must be <em>relative</em> to
the page the shape is part of, i.e. within the [0,1]
range. This is necessary, since the string might
contain symbolic references to the shape bounding box.
@throws ParseError if an invalid expression is given.
@return the generated function object.
*/
static ExpressionNodeSharedPtr parseSmilFunction( const ::rtl::OUString& rSmilFunction,
const ::basegfx::B2DRectangle& rRelativeShapeBounds ); // throw ParseError
private:
// disabled constructor/destructor, since this is
// supposed to be a singleton
SmilFunctionParser();
// default: disabled copy/assignment
SmilFunctionParser(const SmilFunctionParser&);
SmilFunctionParser& operator=( const SmilFunctionParser& );
};
}
}
#endif /* _SLIDESHOW_SMILFUNCTIONPARSER_HXX */
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