1/* -*- Mode: C; indent-tabs-mode:nil; c-basic-offset: 8-*- */ 2 3/* 4 * This file is part of The Croco Library 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of version 2.1 of the GNU General Public 8 * License as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 18 * USA 19 * 20 * Author: Dodji Seketeli 21 * See COPYRIGHTS file for copyright information. 22 */ 23 24#include <stdio.h> 25#include <glib.h> 26#include "cr-utils.h" 27#include "cr-rgb.h" 28#include "cr-num.h" 29#include "cr-string.h" 30 31#ifndef __CR_TERM_H__ 32#define __CR_TERM_H__ 33 34G_BEGIN_DECLS 35 36/** 37 *@file 38 *Declaration of the #CRTem class. 39 */ 40 41enum CRTermType 42{ 43 TERM_NO_TYPE = 0, 44 TERM_NUMBER, 45 TERM_FUNCTION, 46 TERM_STRING, 47 TERM_IDENT, 48 TERM_URI, 49 TERM_RGB, 50 TERM_UNICODERANGE, 51 TERM_HASH 52} ; 53 54 55enum UnaryOperator 56{ 57 NO_UNARY_UOP = 0, 58 PLUS_UOP, 59 MINUS_UOP, 60 EMPTY_UNARY_UOP 61} ; 62 63enum Operator 64{ 65 NO_OP = 0, 66 DIVIDE, 67 COMMA 68} ; 69 70struct _CRTerm ; 71typedef struct _CRTerm CRTerm ; 72 73/** 74 *An abstraction of a css2 term as 75 *defined in the CSS2 spec in appendix D.1: 76 *term ::= 77 *[ NUMBER S* | PERCENTAGE S* | LENGTH S* | EMS S* | EXS S* 78 *| ANGLE S* | TIME S* | FREQ S* | function ] 79 * | STRING S* | IDENT S* | URI S* | RGB S* 80 *| UNICODERANGE S* | hexcolor 81 */ 82struct _CRTerm 83{ 84 /** 85 *The type of the term. 86 */ 87 enum CRTermType type ; 88 89 /** 90 *The unary operator associated to 91 *the current term. 92 */ 93 enum UnaryOperator unary_op ; 94 95 /** 96 *The operator associated to the current term. 97 */ 98 enum Operator the_operator ; 99 100 101 /** 102 *The content of the term. 103 *Depending of the type of the term, 104 *this holds either a number, a percentage ... 105 */ 106 union 107 { 108 CRNum *num ; 109 CRString * str ; 110 CRRgb * rgb ; 111 } content ; 112 113 /** 114 *If the term is of type UNICODERANGE, 115 *this field holds the upper bound of the range. 116 *if the term is of type FUNCTION, this holds 117 *an instance of CRTerm that represents 118 * the expression which is the argument of the function. 119 */ 120 union 121 { 122 CRTerm *func_param ; 123 } ext_content ; 124 125 /** 126 *A spare pointer, just in case. 127 *Can be used by the application. 128 */ 129 gpointer app_data ; 130 131 glong ref_count ; 132 133 /** 134 *A pointer to the next term, 135 *just in case this term is part of 136 *an expression. 137 */ 138 CRTerm *next ; 139 140 /** 141 *A pointer to the previous 142 *term. 143 */ 144 CRTerm *prev ; 145 CRParsingLocation location ; 146} ; 147 148CRTerm * cr_term_parse_expression_from_buf (const guchar *a_buf, 149 enum CREncoding a_encoding) ; 150CRTerm * cr_term_new (void) ; 151 152enum CRStatus cr_term_set_number (CRTerm *a_this, CRNum *a_num) ; 153 154enum CRStatus cr_term_set_function (CRTerm *a_this, 155 CRString *a_func_name, 156 CRTerm *a_func_param) ; 157 158enum CRStatus cr_term_set_string (CRTerm *a_this, CRString *a_str) ; 159 160enum CRStatus cr_term_set_ident (CRTerm *a_this, CRString *a_str) ; 161 162enum CRStatus cr_term_set_uri (CRTerm *a_this, CRString *a_str) ; 163 164enum CRStatus cr_term_set_rgb (CRTerm *a_this, CRRgb *a_rgb) ; 165 166enum CRStatus cr_term_set_hash (CRTerm *a_this, CRString *a_str) ; 167 168CRTerm * cr_term_append_term (CRTerm *a_this, CRTerm *a_new_term) ; 169 170CRTerm * cr_term_prepend_term (CRTerm *a_this, CRTerm *a_new_term) ; 171 172guchar * cr_term_to_string (CRTerm *a_this) ; 173 174guchar * cr_term_one_to_string (CRTerm * a_this) ; 175 176void cr_term_dump (CRTerm *a_this, FILE *a_fp) ; 177 178int cr_term_nr_values (CRTerm *a_this) ; 179 180CRTerm * cr_term_get_from_list (CRTerm *a_this, int itemnr) ; 181 182void cr_term_ref (CRTerm *a_this) ; 183 184gboolean cr_term_unref (CRTerm *a_this) ; 185 186void cr_term_destroy (CRTerm * a_term) ; 187 188G_END_DECLS 189 190#endif /*__CR_TERM_H__*/ 191