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/* -*- Mode: C; indent-tabs-mode:nil; c-basic-offset: 8-*- */
/*
* This file is part of The Croco Library
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2.1 of the GNU Lesser General Public
* License as published by the Free Software Foundation.
*
* This program 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 Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
* Author: Dodji Seketeli
* See COPYRIGHTS file for copyright information.
*/
#include <stdio.h>
#include <glib.h>
#include "cr-utils.h"
#include "cr-rgb.h"
#include "cr-num.h"
#include "cr-string.h"
#ifndef __CR_TERM_H__
#define __CR_TERM_H__
G_BEGIN_DECLS
/**
*@file
*Declaration of the #CRTerm class.
*/
enum CRTermType
{
TERM_NO_TYPE = 0,
TERM_NUMBER,
TERM_FUNCTION,
TERM_STRING,
TERM_IDENT,
TERM_URI,
TERM_RGB,
TERM_UNICODERANGE,
TERM_HASH
} ;
enum UnaryOperator
{
NO_UNARY_UOP = 0,
PLUS_UOP,
MINUS_UOP,
EMPTY_UNARY_UOP
} ;
enum Operator
{
NO_OP = 0,
DIVIDE,
COMMA
} ;
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 CRTermType type ;
/**
*The unary operator associated to
*the current term.
*/
enum UnaryOperator unary_op ;
/**
*The operator associated to the current term.
*/
enum Operator the_operator ;
/**
*The content of the term.
*Depending of the type of the term,
*this holds either a number, a percentage ...
*/
union
{
CRNum *num ;
CRString * 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 flag to indicate if there is an n as in the nth child expression 'an+b'.
*/
gboolean n;
/**
*A spare pointer, just in case.
*Can be used by the application.
*/
gpointer app_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 ;
CRParsingLocation location ;
} ;
CRTerm * cr_term_parse_expression_from_buf (const guchar *a_buf,
enum CREncoding a_encoding) ;
CRTerm * cr_term_new (void) ;
enum CRStatus cr_term_set_number (CRTerm *a_this, CRNum *a_num) ;
enum CRStatus cr_term_set_function (CRTerm *a_this,
CRString *a_func_name,
CRTerm *a_func_param) ;
enum CRStatus cr_term_set_string (CRTerm *a_this, CRString *a_str) ;
enum CRStatus cr_term_set_ident (CRTerm *a_this, CRString *a_str) ;
enum CRStatus cr_term_set_uri (CRTerm *a_this, CRString *a_str) ;
enum CRStatus cr_term_set_rgb (CRTerm *a_this, CRRgb *a_rgb) ;
enum CRStatus cr_term_set_hash (CRTerm *a_this, CRString *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) ;
guchar * cr_term_to_string (CRTerm const *a_this) ;
guchar * cr_term_one_to_string (CRTerm const * a_this) ;
void cr_term_dump (CRTerm const *a_this, FILE *a_fp) ;
int cr_term_nr_values (CRTerm const *a_this) ;
CRTerm * cr_term_get_from_list (CRTerm *a_this, int itemnr) ;
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__*/
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