Libcroco
|
00001 /* -*- Mode: C; indent-tabs-mode:nil; c-basic-offset: 8-*- */ 00002 00003 /* 00004 * This file is part of The Croco Library 00005 * 00006 * This program is free software; you can redistribute it and/or 00007 * modify it under the terms of version 2.1 of the GNU Lesser General Public 00008 * License as published by the Free Software Foundation. 00009 * 00010 * This program is distributed in the hope that it will be useful, 00011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00013 * GNU General Public License for more details. 00014 * 00015 * You should have received a copy of the GNU Lesser General Public License 00016 * along with this program; if not, write to the Free Software 00017 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 00018 * USA 00019 * 00020 * Author: Dodji Seketeli 00021 * See COPYRIGHTS file for copyright information. 00022 */ 00023 00024 #include <stdio.h> 00025 #include <glib.h> 00026 #include "cr-utils.h" 00027 #include "cr-rgb.h" 00028 #include "cr-num.h" 00029 #include "cr-string.h" 00030 00031 #ifndef __CR_TERM_H__ 00032 #define __CR_TERM_H__ 00033 00034 G_BEGIN_DECLS 00035 00036 /** 00037 *@file 00038 *Declaration of the #CRTem class. 00039 */ 00040 00041 enum CRTermType 00042 { 00043 TERM_NO_TYPE = 0, 00044 TERM_NUMBER, 00045 TERM_FUNCTION, 00046 TERM_STRING, 00047 TERM_IDENT, 00048 TERM_URI, 00049 TERM_RGB, 00050 TERM_UNICODERANGE, 00051 TERM_HASH 00052 } ; 00053 00054 00055 enum UnaryOperator 00056 { 00057 NO_UNARY_UOP = 0, 00058 PLUS_UOP, 00059 MINUS_UOP, 00060 EMPTY_UNARY_UOP 00061 } ; 00062 00063 enum Operator 00064 { 00065 NO_OP = 0, 00066 DIVIDE, 00067 COMMA 00068 } ; 00069 00070 struct _CRTerm ; 00071 typedef struct _CRTerm CRTerm ; 00072 00073 /** 00074 *An abstraction of a css2 term as 00075 *defined in the CSS2 spec in appendix D.1: 00076 *term ::= 00077 *[ NUMBER S* | PERCENTAGE S* | LENGTH S* | EMS S* | EXS S* 00078 *| ANGLE S* | TIME S* | FREQ S* | function ] 00079 * | STRING S* | IDENT S* | URI S* | RGB S* 00080 *| UNICODERANGE S* | hexcolor 00081 */ 00082 struct _CRTerm 00083 { 00084 /** 00085 *The type of the term. 00086 */ 00087 enum CRTermType type ; 00088 00089 /** 00090 *The unary operator associated to 00091 *the current term. 00092 */ 00093 enum UnaryOperator unary_op ; 00094 00095 /** 00096 *The operator associated to the current term. 00097 */ 00098 enum Operator the_operator ; 00099 00100 00101 /** 00102 *The content of the term. 00103 *Depending of the type of the term, 00104 *this holds either a number, a percentage ... 00105 */ 00106 union 00107 { 00108 CRNum *num ; 00109 CRString * str ; 00110 CRRgb * rgb ; 00111 } content ; 00112 00113 /** 00114 *If the term is of type UNICODERANGE, 00115 *this field holds the upper bound of the range. 00116 *if the term is of type FUNCTION, this holds 00117 *an instance of CRTerm that represents 00118 * the expression which is the argument of the function. 00119 */ 00120 union 00121 { 00122 CRTerm *func_param ; 00123 } ext_content ; 00124 00125 /** 00126 *A spare pointer, just in case. 00127 *Can be used by the application. 00128 */ 00129 gpointer app_data ; 00130 00131 glong ref_count ; 00132 00133 /** 00134 *A pointer to the next term, 00135 *just in case this term is part of 00136 *an expression. 00137 */ 00138 CRTerm *next ; 00139 00140 /** 00141 *A pointer to the previous 00142 *term. 00143 */ 00144 CRTerm *prev ; 00145 CRParsingLocation location ; 00146 } ; 00147 00148 CRTerm * cr_term_parse_expression_from_buf (const guchar *a_buf, 00149 enum CREncoding a_encoding) ; 00150 CRTerm * cr_term_new (void) ; 00151 00152 enum CRStatus cr_term_set_number (CRTerm *a_this, CRNum *a_num) ; 00153 00154 enum CRStatus cr_term_set_function (CRTerm *a_this, 00155 CRString *a_func_name, 00156 CRTerm *a_func_param) ; 00157 00158 enum CRStatus cr_term_set_string (CRTerm *a_this, CRString *a_str) ; 00159 00160 enum CRStatus cr_term_set_ident (CRTerm *a_this, CRString *a_str) ; 00161 00162 enum CRStatus cr_term_set_uri (CRTerm *a_this, CRString *a_str) ; 00163 00164 enum CRStatus cr_term_set_rgb (CRTerm *a_this, CRRgb *a_rgb) ; 00165 00166 enum CRStatus cr_term_set_hash (CRTerm *a_this, CRString *a_str) ; 00167 00168 CRTerm * cr_term_append_term (CRTerm *a_this, CRTerm *a_new_term) ; 00169 00170 CRTerm * cr_term_prepend_term (CRTerm *a_this, CRTerm *a_new_term) ; 00171 00172 guchar * cr_term_to_string (CRTerm const *a_this) ; 00173 00174 guchar * cr_term_one_to_string (CRTerm const * a_this) ; 00175 00176 void cr_term_dump (CRTerm const *a_this, FILE *a_fp) ; 00177 00178 int cr_term_nr_values (CRTerm const *a_this) ; 00179 00180 CRTerm * cr_term_get_from_list (CRTerm *a_this, int itemnr) ; 00181 00182 void cr_term_ref (CRTerm *a_this) ; 00183 00184 gboolean cr_term_unref (CRTerm *a_this) ; 00185 00186 void cr_term_destroy (CRTerm * a_term) ; 00187 00188 G_END_DECLS 00189 00190 #endif /*__CR_TERM_H__*/