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Diffstat (limited to 'slideshow/source/inc/smilfunctionparser.hxx')
| -rw-r--r-- | slideshow/source/inc/smilfunctionparser.hxx | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/slideshow/source/inc/smilfunctionparser.hxx b/slideshow/source/inc/smilfunctionparser.hxx new file mode 100644 index 000000000000..208f7112e0f4 --- /dev/null +++ b/slideshow/source/inc/smilfunctionparser.hxx @@ -0,0 +1,167 @@ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org 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 version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 License. + * + ************************************************************************/ + +#ifndef INCLUDED_SLIDESHOW_SMILFUNCTIONPARSER_HXX +#define INCLUDED_SLIDESHOW_SMILFUNCTIONPARSER_HXX + +#include "expressionnode.hxx" +#include "slideshowexceptions.hxx" + +#include <basegfx/range/b2drectangle.hxx> + +#include <boost/noncopyable.hpp> + +namespace rtl +{ + class OUString; +} + +/* Definition of SmilFunctionParser class */ + +namespace slideshow +{ + namespace internal + { + class SmilFunctionParser : private boost::noncopyable + { + 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(); + }; + } +} + +#endif /* INCLUDED_SLIDESHOW_SMILFUNCTIONPARSER_HXX */ |