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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #ifndef _ENHANCEDCUSTOMSHAPEFUNCTIONPARSER_HXX
21 : #define _ENHANCEDCUSTOMSHAPEFUNCTIONPARSER_HXX
22 :
23 : #include <sal/config.h>
24 : #include <boost/shared_ptr.hpp>
25 : #include "EnhancedCustomShapeFunctionParser.hxx"
26 : #include <com/sun/star/drawing/EnhancedCustomShapeParameter.hpp>
27 : #include <com/sun/star/drawing/EnhancedCustomShapeParameterType.hpp>
28 : #include <vector>
29 :
30 : #include <svx/svxdllapi.h>
31 :
32 : struct EnhancedCustomShapeEquation
33 : {
34 : sal_Int32 nOperation;
35 : sal_Int32 nPara[ 3 ];
36 :
37 10 : EnhancedCustomShapeEquation() :
38 10 : nOperation ( 0 )
39 : {
40 10 : nPara[ 0 ] = nPara[ 1 ] = nPara[ 2 ] = 0;
41 10 : }
42 : };
43 :
44 : class EnhancedCustomShape2d;
45 :
46 : namespace EnhancedCustomShape {
47 :
48 : enum ExpressionFunct
49 : {
50 : FUNC_CONST,
51 :
52 : ENUM_FUNC_PI,
53 : ENUM_FUNC_LEFT,
54 : ENUM_FUNC_TOP,
55 : ENUM_FUNC_RIGHT,
56 : ENUM_FUNC_BOTTOM,
57 : ENUM_FUNC_XSTRETCH,
58 : ENUM_FUNC_YSTRETCH,
59 : ENUM_FUNC_HASSTROKE,
60 : ENUM_FUNC_HASFILL,
61 : ENUM_FUNC_WIDTH,
62 : ENUM_FUNC_HEIGHT,
63 : ENUM_FUNC_LOGWIDTH,
64 : ENUM_FUNC_LOGHEIGHT,
65 : ENUM_FUNC_ADJUSTMENT,
66 : ENUM_FUNC_EQUATION,
67 :
68 : UNARY_FUNC_ABS,
69 : UNARY_FUNC_SQRT,
70 : UNARY_FUNC_SIN,
71 : UNARY_FUNC_COS,
72 : UNARY_FUNC_TAN,
73 : UNARY_FUNC_ATAN,
74 : UNARY_FUNC_NEG,
75 :
76 : BINARY_FUNC_PLUS,
77 : BINARY_FUNC_MINUS,
78 : BINARY_FUNC_MUL,
79 : BINARY_FUNC_DIV,
80 : BINARY_FUNC_MIN,
81 : BINARY_FUNC_MAX,
82 : BINARY_FUNC_ATAN2,
83 :
84 : TERNARY_FUNC_IF
85 : };
86 :
87 : #define EXPRESSION_FLAG_SUMANGLE_MODE 1
88 :
89 : SVX_DLLPUBLIC void FillEquationParameter( const com::sun::star::drawing::EnhancedCustomShapeParameter&, const sal_Int32, EnhancedCustomShapeEquation& );
90 :
91 9955 : class ExpressionNode
92 : {
93 : public:
94 : virtual ~ExpressionNode();
95 :
96 : /** Predicate whether this node is constant.
97 :
98 : This predicate returns true, if this node is
99 : neither time- nor ViewInfo dependent. This allows
100 : for certain obtimizations, i.e. not the full
101 : expression tree needs be represented by
102 : ExpressionNodes.
103 :
104 : @returns true, if the note is constant
105 : */
106 : virtual bool isConstant() const = 0;
107 :
108 : /** Operator to calculate function value.
109 :
110 : This method calculates the function value.
111 : */
112 : virtual double operator()() const = 0;
113 :
114 : /** Operator to retrieve the type of expression node
115 : */
116 : virtual ExpressionFunct getType() const = 0;
117 :
118 : /** Operator to retrieve the ms version of expression
119 : */
120 : virtual com::sun::star::drawing::EnhancedCustomShapeParameter fillNode(
121 : std::vector< EnhancedCustomShapeEquation >& rEquations, ExpressionNode* pOptionalArg, sal_uInt32 nFlags ) = 0;
122 : };
123 : typedef ::boost::shared_ptr< ExpressionNode > ExpressionNodeSharedPtr;
124 :
125 : /** This exception is thrown, when the arithmetic expression
126 : parser failed to parse a string.
127 : */
128 : struct ParseError
129 : {
130 : ParseError() {}
131 0 : ParseError( const char* ) {}
132 : };
133 :
134 : class FunctionParser
135 : {
136 : public:
137 :
138 : /** Parse a string
139 :
140 : The following grammar is accepted by this method:
141 : <code>
142 :
143 : number_digit = '0'|'1'|'2'|'3'|'4'|'5'|'6'|'7'|'8'|'9'
144 :
145 : number = number number_digit | number_digit
146 :
147 : identifier = 'pi'|'left'|'top'|'right'|'bottom'|'xstretch'|'ystretch'|
148 : 'hasstroke'|'hasfill'|'width'|'height'|'logwidth'|'logheight'
149 :
150 : unary_function = 'abs'|'sqrt'|'sin'|'cos'|'tan'|'atan'
151 : binary_function = 'min'|'max'|'atan2'
152 : ternary_function = 'if'
153 :
154 : function_reference = '?' 'a-z,A-Z,0-9' ' '
155 : modifier_reference = '$' '0-9' ' '
156 :
157 : basic_expression =
158 : number |
159 : identifier |
160 : function_reference |
161 : unary_function '(' additive_expression ')' |
162 : binary_function '(' additive_expression ',' additive_expression ')' |
163 : ternary_function '(' additive_expression ',' additive_expression ',
164 : ' additive_expression ')' | '(' additive_expression ')'
165 :
166 : unary_expression = '-' basic_expression
167 :
168 : multiplicative_expression =
169 : basic_expression |
170 : multiplicative_expression '*' basic_expression |
171 : multiplicative_expression '/' basic_expression
172 :
173 : additive_expression =
174 : multiplicative_expression |
175 : additive_expression '+' multiplicative_expression |
176 : additive_expression '-' multiplicative_expression
177 :
178 : </code>
179 :
180 : @param rFunction
181 : The string to parse
182 :
183 : @param rCustoShape
184 : The CustomShape is required for calculation of dynamic values such
185 : "hasstroke", function references and or modifier references ...
186 :
187 : @throws ParseError if an invalid expression is given.
188 :
189 : @return the generated function object.
190 : */
191 :
192 : SVX_DLLPUBLIC static ExpressionNodeSharedPtr parseFunction( const OUString& rFunction, const EnhancedCustomShape2d& rCustoShape );
193 :
194 : private:
195 : // disabled constructor/destructor, since this is
196 : // supposed to be a singleton
197 : FunctionParser();
198 :
199 : // default: disabled copy/assignment
200 : FunctionParser(const FunctionParser&);
201 : FunctionParser& operator=( const FunctionParser& );
202 : };
203 :
204 : }
205 :
206 : #endif /* _ENHANCEDCUSTOMSHAPEFUNCTIONPARSER_HXX */
207 :
208 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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