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