170 lines
6.6 KiB
C++
170 lines
6.6 KiB
C++
/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2008 by Sun Microsystems, Inc.
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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: smilfunctionparser.hxx,v $
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* $Revision: 1.6 $
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org 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
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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#ifndef INCLUDED_SLIDESHOW_SMILFUNCTIONPARSER_HXX
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#define INCLUDED_SLIDESHOW_SMILFUNCTIONPARSER_HXX
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#include "expressionnode.hxx"
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#include "slideshowexceptions.hxx"
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#include <basegfx/range/b2drectangle.hxx>
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#include <boost/noncopyable.hpp>
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namespace rtl
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{
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class OUString;
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}
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/* Definition of SmilFunctionParser class */
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namespace slideshow
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{
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namespace internal
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{
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class SmilFunctionParser : private boost::noncopyable
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{
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public:
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/** Parse a string containing a SMIL value.
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This method parses a string representing
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a fixed value (i.e. a value that does not
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change by time). Due to the dynamic view
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capabilities of the presentation engine,
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this value can sometimes only be determined
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during runtime of the animation (because
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e.g. mixed screen/view coordinates are
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involved), and is thus still returned as an
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ExpressionNode object. An example for
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such a case is the "Width+1.0" string, which
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contains the width of the shape in user
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coordinate space, and the screen width
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in device coordinate space.
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The following grammar is accepted by this method:
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<code>
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identifier = 'pi'|'e'|'X'|'Y'|'Width'|'Height'
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function = 'abs'|'sqrt'|'sin'|'cos'|'tan'|'atan'|'acos'|'asin'|'exp'|'log'
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basic_expression =
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number |
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identifier |
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function '(' additive_expression ')' |
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'(' additive_expression ')'
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unary_expression =
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'-' basic_expression |
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basic_expression
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multiplicative_expression =
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unary_expression ( ( '*' unary_expression )* |
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( '/' unary_expression )* )
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additive_expression =
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multiplicative_expression ( ( '+' multiplicative_expression )* |
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( '-' multiplicative_expression )* )
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</code>
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@param rSmilValue
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The string to parse
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@param rRelativeShapeBounds
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The bounds of the shape this SMIL value is to be
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evaluated for. The bounds must be <em>relative</em> to
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the page the shape is part of, i.e. within the [0,1]
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range. This is necessary, since the string might
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contain symbolic references to the shape bounding box.
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@throws ParseError if an invalid expression is given.
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@return the generated function object.
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*/
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static ExpressionNodeSharedPtr parseSmilValue( const ::rtl::OUString& rSmilValue,
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const ::basegfx::B2DRectangle& rRelativeShapeBounds ); // throw ParseError
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/** Parse a string containing a SMIL function.
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This method parses a string representing
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a possibly time-varying SMIL function.
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The following grammar is accepted by this method:
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<code>
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identifier = 't'|'pi'|'e'|'X'|'Y'|'Width'|'Height'
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function = 'abs'|'sqrt'|'sin'|'cos'|'tan'|'atan'|'acos'|'asin'|'exp'|'log'
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basic_expression =
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number |
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identifier |
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function '(' additive_expression ')' |
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'(' additive_expression ')'
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unary_expression =
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'-' basic_expression |
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basic_expression
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multiplicative_expression =
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unary_expression ( ( '*' unary_expression )* |
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( '/' unary_expression )* )
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additive_expression =
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multiplicative_expression ( ( '+' multiplicative_expression )* |
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( '-' multiplicative_expression )* )
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</code>
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@param rSmilFunction
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The string to parse
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@param rRelativeShapeBounds
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The bounds of the shape this SMIL value is to be
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evaluated for. The bounds must be <em>relative</em> to
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the page the shape is part of, i.e. within the [0,1]
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range. This is necessary, since the string might
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contain symbolic references to the shape bounding box.
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@throws ParseError if an invalid expression is given.
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@return the generated function object.
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*/
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static ExpressionNodeSharedPtr parseSmilFunction( const ::rtl::OUString& rSmilFunction,
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const ::basegfx::B2DRectangle& rRelativeShapeBounds ); // throw ParseError
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private:
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// disabled constructor/destructor, since this is
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// supposed to be a singleton
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SmilFunctionParser();
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};
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}
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}
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#endif /* INCLUDED_SLIDESHOW_SMILFUNCTIONPARSER_HXX */
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