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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_SLIDESHOW_SOURCE_INC_SMILFUNCTIONPARSER_HXX
#define INCLUDED_SLIDESHOW_SOURCE_INC_SMILFUNCTIONPARSER_HXX
#include "expressionnode.hxx"
#include <basegfx/range/b2drectangle.hxx>
#include <rtl/ustring.hxx>
#include <memory>
/* Definition of SmilFunctionParser class */
namespace slideshow::internal
{
class SmilFunctionParser
{
public:
SmilFunctionParser() = delete;
SmilFunctionParser(const SmilFunctionParser&) = delete;
SmilFunctionParser& operator=(const SmilFunctionParser&) = delete;
/** 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 std::shared_ptr<ExpressionNode> const & parseSmilValue( const 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 std::shared_ptr<ExpressionNode> const & parseSmilFunction( const OUString& rSmilFunction,
const ::basegfx::B2DRectangle& rRelativeShapeBounds ); // throw ParseError
};
}
#endif // INCLUDED_SLIDESHOW_SOURCE_INC_SMILFUNCTIONPARSER_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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