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+/* -*- Mode: C; indent-tabs-mode:nil; c-basic-offset: 8-*- */
+
+/*
+ *This file is part of The Croco Library
+ *
+ *The Croco Library is free software; 
+ *you can redistribute it and/or modify it under the terms of 
+ *the GNU General Public License as 
+ *published by the Free Software Foundation; either version 2, 
+ *or (at your option) any later version.
+ *
+ *GNU The Croco Library is distributed in the hope 
+ *that it will be useful, but WITHOUT ANY WARRANTY; 
+ *without even the implied warranty of 
+ *MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *See the GNU General Public License for more details.
+ *
+ *You should have received a copy of the 
+ *GNU General Public License along with The Croco Library; 
+ *see the file COPYING. If not, write to 
+ *the Free Software Foundation, Inc., 
+ *59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ *Copyright 2002-2003 Dodji Seketeli <dodji@seketeli.org>
+ */
+
+/*
+ *$Id$
+ */
+
+#include <stdio.h>
+#include <glib.h>
+#include "cr-utils.h"
+#include "cr-rgb.h"
+#include "cr-num.h"
+
+#ifndef __CR_TERM_H__
+#define __CR_TERM_H__
+
+G_END_DECLS
+
+/**
+ *@file
+ *Declaration of the #CRTem class.
+ */
+
+struct _CRTerm ;
+typedef struct _CRTerm CRTerm ;
+
+/**
+ *An abstraction of a css2 term as
+ *defined in the CSS2 spec in appendix D.1:
+ *term ::=
+ *[ NUMBER S* | PERCENTAGE S* | LENGTH S* | EMS S* | EXS S* 
+ *| ANGLE S* | TIME S* | FREQ S* | function ]
+ * | STRING S* | IDENT S* | URI S* | RGB S* 
+ *| UNICODERANGE S* | hexcolor
+ */
+struct _CRTerm
+{
+        /**
+         *The type of the term.
+         */
+        enum TermType type ;
+                
+        /**
+         *The unit of the term
+         */
+        enum TermUnit unit ;
+
+        /**
+         *The unary operator associated to
+         *the current term.
+         */
+        enum UnaryOperator unary_op ;
+
+        /**
+         *The operator associated to the current term.
+         */
+        enum Operator operator ;
+
+
+        /**
+         *The content of the term.
+         *Depending of the type of the term,
+         *this holds either a number, a percentage ...
+         */
+        union
+        {
+                CRNum *num ;
+                GString * str ;
+                CRRgb * rgb ;
+        } content ;
+
+        /**
+         *If the term is of type UNICODERANGE, 
+         *this field holds the upper bound of the range.
+         *if the term is of type FUNCTION, this holds
+         *an instance of CRTerm that represents
+         * the expression which is the argument of the function.
+         */
+        union
+        {
+                CRTerm *func_param ;                        
+        } ext_content ;
+
+        /**
+         *A spare pointer, just in case.
+         *Can be used by the application.
+         */
+        void * custom_data ;
+
+        glong ref_count ;
+
+        /**
+         *A pointer to the next term, 
+         *just in case this term is part of
+         *an expression.
+         */
+        CRTerm *next ;
+
+        /**
+         *A pointer to the previous
+         *term.
+         */
+        CRTerm *prev ;
+} ;
+
+CRTerm *
+cr_term_new (void) ;
+
+enum CRStatus
+cr_term_set_number (CRTerm *a_this, CRNum *a_num) ;
+        
+enum CRStatus
+cr_term_set_percentage (CRTerm *a_this, CRNum *a_num) ;
+
+enum CRStatus
+cr_term_set_length (CRTerm *a_this, enum TermUnit a_unit,
+                    CRNum *a_num) ;
+
+enum CRStatus
+cr_term_set_ems (CRTerm *a_this, CRNum *a_num) ;
+
+enum CRStatus
+cr_term_set_exs (CRTerm *a_this, CRNum * a_num) ;
+
+enum CRStatus
+cr_term_set_angle (CRTerm *a_this, enum TermUnit a_unit,
+                   CRNum *a_num) ;
+
+enum CRStatus
+cr_term_set_time (CRTerm *a_this, enum TermUnit a_unit,
+                  CRNum *a_num) ;
+
+enum CRStatus
+cr_term_set_freq (CRTerm *a_this, enum TermUnit a_unit,
+                  CRNum *a_num) ;
+
+enum CRStatus
+cr_term_set_function (CRTerm *a_this, GString *a_func_name,
+                      CRTerm *a_func_param) ;
+
+enum CRStatus
+cr_term_set_string (CRTerm *a_this, GString *a_str) ;
+
+enum CRStatus
+cr_term_set_ident (CRTerm *a_this, GString *a_str) ;
+
+enum CRStatus
+cr_term_set_uri (CRTerm *a_this, GString *a_str) ;
+        
+enum CRStatus
+cr_term_set_rgb (CRTerm *a_this, CRRgb *a_rgb) ;                
+        
+enum CRStatus
+cr_term_set_hash (CRTerm *a_this, GString *a_str) ;
+        
+CRTerm *
+cr_term_append_term (CRTerm *a_this, CRTerm *a_new_term) ;
+
+CRTerm *
+cr_term_prepend_term (CRTerm *a_this, CRTerm *a_new_term) ;
+
+void
+cr_term_dump (CRTerm *a_this, FILE *a_fp) ;
+
+void
+cr_term_ref (CRTerm *a_this) ;
+
+gboolean
+cr_term_unref (CRTerm *a_this) ;
+
+void
+cr_term_destroy (CRTerm * a_term) ;
+
+G_END_DECLS
+
+#endif /*__CR_TERM_H__*/