1*aaef562fSAndrew Rist /************************************************************** 2cdf0e10cSrcweir * 3*aaef562fSAndrew Rist * Licensed to the Apache Software Foundation (ASF) under one 4*aaef562fSAndrew Rist * or more contributor license agreements. See the NOTICE file 5*aaef562fSAndrew Rist * distributed with this work for additional information 6*aaef562fSAndrew Rist * regarding copyright ownership. The ASF licenses this file 7*aaef562fSAndrew Rist * to you under the Apache License, Version 2.0 (the 8*aaef562fSAndrew Rist * "License"); you may not use this file except in compliance 9*aaef562fSAndrew Rist * with the License. You may obtain a copy of the License at 10*aaef562fSAndrew Rist * 11*aaef562fSAndrew Rist * http://www.apache.org/licenses/LICENSE-2.0 12*aaef562fSAndrew Rist * 13*aaef562fSAndrew Rist * Unless required by applicable law or agreed to in writing, 14*aaef562fSAndrew Rist * software distributed under the License is distributed on an 15*aaef562fSAndrew Rist * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16*aaef562fSAndrew Rist * KIND, either express or implied. See the License for the 17*aaef562fSAndrew Rist * specific language governing permissions and limitations 18*aaef562fSAndrew Rist * under the License. 19*aaef562fSAndrew Rist * 20*aaef562fSAndrew Rist *************************************************************/ 21*aaef562fSAndrew Rist 22*aaef562fSAndrew Rist 23cdf0e10cSrcweir 24cdf0e10cSrcweir #ifndef INCLUDED_SLIDESHOW_SMILFUNCTIONPARSER_HXX 25cdf0e10cSrcweir #define INCLUDED_SLIDESHOW_SMILFUNCTIONPARSER_HXX 26cdf0e10cSrcweir 27cdf0e10cSrcweir #include "expressionnode.hxx" 28cdf0e10cSrcweir #include "slideshowexceptions.hxx" 29cdf0e10cSrcweir 30cdf0e10cSrcweir #include <basegfx/range/b2drectangle.hxx> 31cdf0e10cSrcweir 32cdf0e10cSrcweir #include <boost/noncopyable.hpp> 33cdf0e10cSrcweir 34cdf0e10cSrcweir namespace rtl 35cdf0e10cSrcweir { 36cdf0e10cSrcweir class OUString; 37cdf0e10cSrcweir } 38cdf0e10cSrcweir 39cdf0e10cSrcweir /* Definition of SmilFunctionParser class */ 40cdf0e10cSrcweir 41cdf0e10cSrcweir namespace slideshow 42cdf0e10cSrcweir { 43cdf0e10cSrcweir namespace internal 44cdf0e10cSrcweir { 45cdf0e10cSrcweir class SmilFunctionParser : private boost::noncopyable 46cdf0e10cSrcweir { 47cdf0e10cSrcweir public: 48cdf0e10cSrcweir /** Parse a string containing a SMIL value. 49cdf0e10cSrcweir 50cdf0e10cSrcweir This method parses a string representing 51cdf0e10cSrcweir a fixed value (i.e. a value that does not 52cdf0e10cSrcweir change by time). Due to the dynamic view 53cdf0e10cSrcweir capabilities of the presentation engine, 54cdf0e10cSrcweir this value can sometimes only be determined 55cdf0e10cSrcweir during runtime of the animation (because 56cdf0e10cSrcweir e.g. mixed screen/view coordinates are 57cdf0e10cSrcweir involved), and is thus still returned as an 58cdf0e10cSrcweir ExpressionNode object. An example for 59cdf0e10cSrcweir such a case is the "Width+1.0" string, which 60cdf0e10cSrcweir contains the width of the shape in user 61cdf0e10cSrcweir coordinate space, and the screen width 62cdf0e10cSrcweir in device coordinate space. 63cdf0e10cSrcweir 64cdf0e10cSrcweir The following grammar is accepted by this method: 65cdf0e10cSrcweir <code> 66cdf0e10cSrcweir identifier = 'pi'|'e'|'X'|'Y'|'Width'|'Height' 67cdf0e10cSrcweir 68cdf0e10cSrcweir function = 'abs'|'sqrt'|'sin'|'cos'|'tan'|'atan'|'acos'|'asin'|'exp'|'log' 69cdf0e10cSrcweir 70cdf0e10cSrcweir basic_expression = 71cdf0e10cSrcweir number | 72cdf0e10cSrcweir identifier | 73cdf0e10cSrcweir function '(' additive_expression ')' | 74cdf0e10cSrcweir '(' additive_expression ')' 75cdf0e10cSrcweir 76cdf0e10cSrcweir unary_expression = 77cdf0e10cSrcweir '-' basic_expression | 78cdf0e10cSrcweir basic_expression 79cdf0e10cSrcweir 80cdf0e10cSrcweir multiplicative_expression = 81cdf0e10cSrcweir unary_expression ( ( '*' unary_expression )* | 82cdf0e10cSrcweir ( '/' unary_expression )* ) 83cdf0e10cSrcweir 84cdf0e10cSrcweir additive_expression = 85cdf0e10cSrcweir multiplicative_expression ( ( '+' multiplicative_expression )* | 86cdf0e10cSrcweir ( '-' multiplicative_expression )* ) 87cdf0e10cSrcweir 88cdf0e10cSrcweir </code> 89cdf0e10cSrcweir 90cdf0e10cSrcweir @param rSmilValue 91cdf0e10cSrcweir The string to parse 92cdf0e10cSrcweir 93cdf0e10cSrcweir @param rRelativeShapeBounds 94cdf0e10cSrcweir The bounds of the shape this SMIL value is to be 95cdf0e10cSrcweir evaluated for. The bounds must be <em>relative</em> to 96cdf0e10cSrcweir the page the shape is part of, i.e. within the [0,1] 97cdf0e10cSrcweir range. This is necessary, since the string might 98cdf0e10cSrcweir contain symbolic references to the shape bounding box. 99cdf0e10cSrcweir 100cdf0e10cSrcweir @throws ParseError if an invalid expression is given. 101cdf0e10cSrcweir 102cdf0e10cSrcweir @return the generated function object. 103cdf0e10cSrcweir */ 104cdf0e10cSrcweir static ExpressionNodeSharedPtr parseSmilValue( const ::rtl::OUString& rSmilValue, 105cdf0e10cSrcweir const ::basegfx::B2DRectangle& rRelativeShapeBounds ); // throw ParseError 106cdf0e10cSrcweir 107cdf0e10cSrcweir /** Parse a string containing a SMIL function. 108cdf0e10cSrcweir 109cdf0e10cSrcweir This method parses a string representing 110cdf0e10cSrcweir a possibly time-varying SMIL function. 111cdf0e10cSrcweir 112cdf0e10cSrcweir The following grammar is accepted by this method: 113cdf0e10cSrcweir <code> 114cdf0e10cSrcweir identifier = 't'|'pi'|'e'|'X'|'Y'|'Width'|'Height' 115cdf0e10cSrcweir 116cdf0e10cSrcweir function = 'abs'|'sqrt'|'sin'|'cos'|'tan'|'atan'|'acos'|'asin'|'exp'|'log' 117cdf0e10cSrcweir 118cdf0e10cSrcweir basic_expression = 119cdf0e10cSrcweir number | 120cdf0e10cSrcweir identifier | 121cdf0e10cSrcweir function '(' additive_expression ')' | 122cdf0e10cSrcweir '(' additive_expression ')' 123cdf0e10cSrcweir 124cdf0e10cSrcweir unary_expression = 125cdf0e10cSrcweir '-' basic_expression | 126cdf0e10cSrcweir basic_expression 127cdf0e10cSrcweir 128cdf0e10cSrcweir multiplicative_expression = 129cdf0e10cSrcweir unary_expression ( ( '*' unary_expression )* | 130cdf0e10cSrcweir ( '/' unary_expression )* ) 131cdf0e10cSrcweir 132cdf0e10cSrcweir additive_expression = 133cdf0e10cSrcweir multiplicative_expression ( ( '+' multiplicative_expression )* | 134cdf0e10cSrcweir ( '-' multiplicative_expression )* ) 135cdf0e10cSrcweir 136cdf0e10cSrcweir </code> 137cdf0e10cSrcweir 138cdf0e10cSrcweir @param rSmilFunction 139cdf0e10cSrcweir The string to parse 140cdf0e10cSrcweir 141cdf0e10cSrcweir @param rRelativeShapeBounds 142cdf0e10cSrcweir The bounds of the shape this SMIL value is to be 143cdf0e10cSrcweir evaluated for. The bounds must be <em>relative</em> to 144cdf0e10cSrcweir the page the shape is part of, i.e. within the [0,1] 145cdf0e10cSrcweir range. This is necessary, since the string might 146cdf0e10cSrcweir contain symbolic references to the shape bounding box. 147cdf0e10cSrcweir 148cdf0e10cSrcweir @throws ParseError if an invalid expression is given. 149cdf0e10cSrcweir 150cdf0e10cSrcweir @return the generated function object. 151cdf0e10cSrcweir */ 152cdf0e10cSrcweir static ExpressionNodeSharedPtr parseSmilFunction( const ::rtl::OUString& rSmilFunction, 153cdf0e10cSrcweir const ::basegfx::B2DRectangle& rRelativeShapeBounds ); // throw ParseError 154cdf0e10cSrcweir 155cdf0e10cSrcweir private: 156cdf0e10cSrcweir // disabled constructor/destructor, since this is 157cdf0e10cSrcweir // supposed to be a singleton 158cdf0e10cSrcweir SmilFunctionParser(); 159cdf0e10cSrcweir }; 160cdf0e10cSrcweir } 161cdf0e10cSrcweir } 162cdf0e10cSrcweir 163cdf0e10cSrcweir #endif /* INCLUDED_SLIDESHOW_SMILFUNCTIONPARSER_HXX */ 164