cr-parser.c revision 0489e8dae1154191b4fa0931545298513034ff38
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy/* -*- Mode: C; indent-tabs-mode:nil; c-basic-offset: 8-*- */
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy/*
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * This file is part of The Croco Library
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * This program is free software; you can redistribute it and/or
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * modify it under the terms of version 2.1 of the
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * GNU Lesser General Public
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * License as published by the Free Software Foundation.
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * This program is distributed in the hope that it will be useful,
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * but WITHOUT ANY WARRANTY; without even the implied warranty of
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * GNU General Public License for more details.
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * You should have received a copy of the GNU Lesser General Public License
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * along with this program; if not, write to the Free Software
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * USA
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * Author: Dodji Seketeli
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * See COPYRIGHTS file for copyrights information.
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy */
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy/**
4b5c8e93cab28d3c65ba9d407fd8f46e3be1db1cMatthew Ahrens *@file
4b5c8e93cab28d3c65ba9d407fd8f46e3be1db1cMatthew Ahrens *The definition of the #CRParser class.
1d32ba663e202c24a5a1f2e5aef83fffb447cb7fJohn Wren Kennedy */
4b5c8e93cab28d3c65ba9d407fd8f46e3be1db1cMatthew Ahrens
4b5c8e93cab28d3c65ba9d407fd8f46e3be1db1cMatthew Ahrens#include "string.h"
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy#include "cr-parser.h"
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy#include "cr-num.h"
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy#include "cr-term.h"
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy#include "cr-simple-sel.h"
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy#include "cr-attr-sel.h"
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy/*
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *Random notes:
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *CSS core syntax vs CSS level 2 syntax
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *=====================================
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *One must keep in mind
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *that css UA must comply with two syntax.
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *1/the specific syntax that defines the css language
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *for a given level of specificatin (e.g css2 syntax
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *defined in appendix D.1 of the css2 spec)
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *2/the core (general) syntax that is there to allow
1d32ba663e202c24a5a1f2e5aef83fffb447cb7fJohn Wren Kennedy *UAs to parse style sheets written in levels of CSS that
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *didn't exist at the time the UAs were created.
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *
1d32ba663e202c24a5a1f2e5aef83fffb447cb7fJohn Wren Kennedy *the name of parsing functions (or methods) contained in this file
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *follows the following scheme: cr_parser_parse_<production_name> (...) ;
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *where <production_name> is the name
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *of a production of the css2 language.
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *When a given production is
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *defined by the css2 level grammar *and* by the
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *css core syntax, there will be two functions to parse that production:
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *one will parse the production defined by the css2 level grammar and the
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *other will parse the production defined by the css core grammar.
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *The css2 level grammar related parsing function will be called:
1d32ba663e202c24a5a1f2e5aef83fffb447cb7fJohn Wren Kennedy *cr_parser_parse_<production_name> (...) ;
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *Then css core grammar related parsing function will be called:
1d32ba663e202c24a5a1f2e5aef83fffb447cb7fJohn Wren Kennedy *cr_parser_parse_<production_name>_core (...) ;
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *If a production is defined only by the css core grammar, then
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *it will be named:
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *cr_parser_parse_<production_name>_core (...) ;
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy */
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy
1d32ba663e202c24a5a1f2e5aef83fffb447cb7fJohn Wren Kennedytypedef struct _CRParserError CRParserError;
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy/**
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *An abstraction of an error reported by by the
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *parsing routines.
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy */
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedystruct _CRParserError {
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy guchar *msg;
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy enum CRStatus status;
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy glong line;
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy glong column;
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy glong byte_num;
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy};
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy
1d32ba663e202c24a5a1f2e5aef83fffb447cb7fJohn Wren Kennedyenum CRParserState {
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy READY_STATE = 0,
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy TRY_PARSE_CHARSET_STATE,
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy CHARSET_PARSED_STATE,
1d32ba663e202c24a5a1f2e5aef83fffb447cb7fJohn Wren Kennedy TRY_PARSE_IMPORT_STATE,
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy IMPORT_PARSED_STATE,
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy TRY_PARSE_RULESET_STATE,
1d32ba663e202c24a5a1f2e5aef83fffb447cb7fJohn Wren Kennedy RULESET_PARSED_STATE,
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy TRY_PARSE_MEDIA_STATE,
1d32ba663e202c24a5a1f2e5aef83fffb447cb7fJohn Wren Kennedy MEDIA_PARSED_STATE,
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy TRY_PARSE_PAGE_STATE,
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy PAGE_PARSED_STATE,
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy TRY_PARSE_FONT_FACE_STATE,
FONT_FACE_PARSED_STATE
} ;
/**
*The private attributes of
*#CRParser.
*/
struct _CRParserPriv {
/**
*The tokenizer
*/
CRTknzr *tknzr;
/**
*The sac handlers to call
*to notify the parsing of
*the css2 constructions.
*/
CRDocHandler *sac_handler;
/**
*A stack of errors reported
*by the parsing routines.
*Contains instance of #CRParserError.
*This pointer is the top of the stack.
*/
GList *err_stack;
enum CRParserState state;
gboolean resolve_import;
gboolean is_case_sensitive;
gboolean use_core_grammar;
};
#define PRIVATE(obj) ((obj)->priv)
#define CHARS_TAB_SIZE 12
/**
*return TRUE if the character is a number ([0-9]), FALSE otherwise
*@param a_char the char to test.
*/
#define IS_NUM(a_char) (((a_char) >= '0' && (a_char) <= '9')?TRUE:FALSE)
/**
*Checks if 'status' equals CR_OK. If not, goto the 'error' label.
*
*@param status the status (of type enum CRStatus) to test.
*@param is_exception if set to FALSE, the final status returned
*by the current function will be CR_PARSING_ERROR. If set to TRUE, the
*current status will be the current value of the 'status' variable.
*
*/
#define CHECK_PARSING_STATUS(status, is_exception) \
if ((status) != CR_OK) \
{ \
if (is_exception == FALSE) \
{ \
status = CR_PARSING_ERROR ; \
} \
goto error ; \
}
/**
*same as CHECK_PARSING_STATUS() but this one pushes an error
*on the parser error stack when an error arises.
*@param a_this the current instance of #CRParser .
*@param a_status the status to check. Is of type enum #CRStatus.
*@param a_is_exception in case of error, if is TRUE, the status
*is set to CR_PARSING_ERROR before goto error. If is false, the
*real low level status is kept and will be returned by the
*upper level function that called this macro. Usally,this must
*be set to FALSE.
*
*/
#define CHECK_PARSING_STATUS_ERR(a_this, a_status, a_is_exception,\
a_err_msg, a_err_status) \
if ((a_status) != CR_OK) \
{ \
if (a_is_exception == FALSE) a_status = CR_PARSING_ERROR ; \
cr_parser_push_error (a_this, a_err_msg, a_err_status) ; \
goto error ; \
}
/**
*Peeks the next char from the input stream of the current parser
*by invoking cr_tknzr_input_peek_char().
*invokes CHECK_PARSING_STATUS on the status returned by
*cr_tknzr_peek_char().
*
*@param a_this the current instance of #CRParser.
*@param a_to_char a pointer to the char where to store the
*char peeked.
*/
#define PEEK_NEXT_CHAR(a_this, a_to_char) \
{\
enum CRStatus status ; \
status = cr_tknzr_peek_char (PRIVATE (a_this)->tknzr, a_to_char) ; \
CHECK_PARSING_STATUS (status, TRUE) \
}
/**
*Reads the next char from the input stream of the current parser.
*In case of error, jumps to the "error:" label located in the
*function where this macro is called.
*@param a_this the curent instance of #CRParser
*@param to_char a pointer to the guint32 char where to store
*the character read.
*/
#define READ_NEXT_CHAR(a_this, a_to_char) \
status = cr_tknzr_read_char (PRIVATE (a_this)->tknzr, a_to_char) ; \
CHECK_PARSING_STATUS (status, TRUE)
/**
*Gets information about the current position in
*the input of the parser.
*In case of failure, this macro returns from the
*calling function and
*returns a status code of type enum #CRStatus.
*@param a_this the current instance of #CRParser.
*@param a_pos out parameter. A pointer to the position
*inside the current parser input. Must
*/
#define RECORD_INITIAL_POS(a_this, a_pos) \
status = cr_tknzr_get_cur_pos (PRIVATE \
(a_this)->tknzr, a_pos) ; \
g_return_val_if_fail (status == CR_OK, status)
/**
*Gets the address of the current byte inside the
*parser input.
*@param parser the current instance of #CRParser.
*@param addr out parameter a pointer (guchar*)
*to where the address must be put.
*/
#define RECORD_CUR_BYTE_ADDR(a_this, a_addr) \
status = cr_tknzr_get_cur_byte_addr \
(PRIVATE (a_this)->tknzr, a_addr) ; \
CHECK_PARSING_STATUS (status, TRUE)
/**
*Peeks a byte from the topmost parser input at
*a given offset from the current position.
*If it fails, goto the "error:" label.
*
*@param a_parser the current instance of #CRParser.
*@param a_offset the offset of the byte to peek, the
*current byte having the offset '0'.
*@param a_byte_ptr out parameter a pointer (guchar*) to
*where the peeked char is to be stored.
*/
#define PEEK_BYTE(a_parser, a_offset, a_byte_ptr) \
status = cr_tknzr_peek_byte (PRIVATE (a_this)->tknzr, \
a_offset, \
a_byte_ptr) ; \
CHECK_PARSING_STATUS (status, TRUE) ;
#define BYTE(a_parser, a_offset, a_eof) \
cr_tknzr_peek_byte2 (PRIVATE (a_this)->tknzr, a_offset, a_eof)
/**
*Reads a byte from the topmost parser input
*steam.
*If it fails, goto the "error" label.
*@param a_this the current instance of #CRParser.
*@param a_byte_ptr the guchar * where to put the read char.
*/
#define READ_NEXT_BYTE(a_this, a_byte_ptr) \
status = cr_tknzr_read_byte (PRIVATE (a_this)->tknzr, a_byte_ptr) ; \
CHECK_PARSING_STATUS (status, TRUE) ;
/**
*Skips a given number of byte in the topmost
*parser input. Don't update line and column number.
*In case of error, jumps to the "error:" label
*of the surrounding function.
*@param a_parser the current instance of #CRParser.
*@param a_nb_bytes the number of bytes to skip.
*/
#define SKIP_BYTES(a_this, a_nb_bytes) \
status = cr_tknzr_seek_index (PRIVATE (a_this)->tknzr, \
CR_SEEK_CUR, a_nb_bytes) ; \
CHECK_PARSING_STATUS (status, TRUE) ;
/**
*Skip utf8 encoded characters.
*Updates line and column numbers.
*@param a_parser the current instance of #CRParser.
*@param a_nb_chars the number of chars to skip. Must be of
*type glong.
*/
#define SKIP_CHARS(a_parser, a_nb_chars) \
{ \
glong nb_chars = a_nb_chars ; \
status = cr_tknzr_consume_chars \
(PRIVATE (a_parser)->tknzr,0, &nb_chars) ; \
CHECK_PARSING_STATUS (status, TRUE) ; \
}
/**
*Tests the condition and if it is false, sets
*status to "CR_PARSING_ERROR" and goto the 'error'
*label.
*@param condition the condition to test.
*/
#define ENSURE_PARSING_COND(condition) \
if (! (condition)) {status = CR_PARSING_ERROR; goto error ;}
#define ENSURE_PARSING_COND_ERR(a_this, a_condition, \
a_err_msg, a_err_status) \
if (! (a_condition)) \
{ \
status = CR_PARSING_ERROR; \
cr_parser_push_error (a_this, a_err_msg, a_err_status) ; \
goto error ; \
}
#define GET_NEXT_TOKEN(a_this, a_token_ptr) \
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, \
a_token_ptr) ; \
ENSURE_PARSING_COND (status == CR_OK) ;
#ifdef WITH_UNICODE_ESCAPE_AND_RANGE
static enum CRStatus cr_parser_parse_unicode_escape (CRParser * a_this,
guint32 * a_unicode);
static enum CRStatus cr_parser_parse_escape (CRParser * a_this,
guint32 * a_esc_code);
static enum CRStatus cr_parser_parse_unicode_range (CRParser * a_this,
CRString ** a_inf,
CRString ** a_sup);
#endif
static enum CRStatus cr_parser_parse_stylesheet_core (CRParser * a_this);
static enum CRStatus cr_parser_parse_atrule_core (CRParser * a_this);
static enum CRStatus cr_parser_parse_ruleset_core (CRParser * a_this);
static enum CRStatus cr_parser_parse_selector_core (CRParser * a_this);
static enum CRStatus cr_parser_parse_declaration_core (CRParser * a_this);
static enum CRStatus cr_parser_parse_any_core (CRParser * a_this);
static enum CRStatus cr_parser_parse_block_core (CRParser * a_this);
static enum CRStatus cr_parser_parse_value_core (CRParser * a_this);
static enum CRStatus cr_parser_parse_string (CRParser * a_this,
CRString ** a_str);
static enum CRStatus cr_parser_parse_ident (CRParser * a_this,
CRString ** a_str);
static enum CRStatus cr_parser_parse_uri (CRParser * a_this,
CRString ** a_str);
static enum CRStatus cr_parser_parse_function (CRParser * a_this,
CRString ** a_func_name,
CRTerm ** a_expr);
static enum CRStatus cr_parser_parse_property (CRParser * a_this,
CRString ** a_property);
static enum CRStatus cr_parser_parse_attribute_selector (CRParser * a_this,
CRAttrSel ** a_sel);
static enum CRStatus cr_parser_parse_simple_selector (CRParser * a_this,
CRSimpleSel ** a_sel);
static enum CRStatus cr_parser_parse_simple_sels (CRParser * a_this,
CRSimpleSel ** a_sel);
static CRParserError *cr_parser_error_new (const guchar * a_msg,
enum CRStatus);
static void cr_parser_error_set_msg (CRParserError * a_this,
const guchar * a_msg);
static void cr_parser_error_dump (CRParserError * a_this);
static void cr_parser_error_set_status (CRParserError * a_this,
enum CRStatus a_status);
static void cr_parser_error_set_pos (CRParserError * a_this,
glong a_line,
glong a_column, glong a_byte_num);
static void
cr_parser_error_destroy (CRParserError * a_this);
static enum CRStatus cr_parser_push_error (CRParser * a_this,
const guchar * a_msg,
enum CRStatus a_status);
static enum CRStatus cr_parser_dump_err_stack (CRParser * a_this,
gboolean a_clear_errs);
static enum CRStatus
cr_parser_clear_errors (CRParser * a_this);
/*****************************
*error managemet methods
*****************************/
/**
*Constructor of #CRParserError class.
*@param a_msg the brute error message.
*@param a_status the error status.
*@return the newly built instance of #CRParserError.
*/
static CRParserError *
cr_parser_error_new (const guchar * a_msg, enum CRStatus a_status)
{
CRParserError *result = (CRParserError *)g_try_malloc (sizeof (CRParserError));
if (result == NULL) {
cr_utils_trace_info ("Out of memory");
return NULL;
}
memset (result, 0, sizeof (CRParserError));
cr_parser_error_set_msg (result, a_msg);
cr_parser_error_set_status (result, a_status);
return result;
}
/**
*Sets the message associated to this instance of #CRError.
*@param a_this the current instance of #CRParserError.
*@param a_msg the new message.
*/
static void
cr_parser_error_set_msg (CRParserError * a_this, const guchar * a_msg)
{
g_return_if_fail (a_this);
if (a_this->msg) {
g_free (a_this->msg);
}
a_this->msg = (guchar *)g_strdup ((gchar *)a_msg);
}
/**
*Sets the error status.
*@param a_this the current instance of #CRParserError.
*@param a_status the new error status.
*
*/
static void
cr_parser_error_set_status (CRParserError * a_this, enum CRStatus a_status)
{
g_return_if_fail (a_this);
a_this->status = a_status;
}
/**
*Sets the position of the parser error.
*@param a_this the current instance of #CRParserError.
*@param a_line the line number.
*@param a_column the column number.
*@param a_byte_num the byte number.
*/
static void
cr_parser_error_set_pos (CRParserError * a_this,
glong a_line, glong a_column, glong a_byte_num)
{
g_return_if_fail (a_this);
a_this->line = a_line;
a_this->column = a_column;
a_this->byte_num = a_byte_num;
}
static void
cr_parser_error_dump (CRParserError * a_this)
{
g_return_if_fail (a_this);
g_printerr ("parsing error: %ld:%ld:", a_this->line, a_this->column);
g_printerr ("%s\n", a_this->msg);
}
/**
*The destructor of #CRParserError.
*@param a_this the current instance of #CRParserError.
*/
static void
cr_parser_error_destroy (CRParserError * a_this)
{
g_return_if_fail (a_this);
if (a_this->msg) {
g_free (a_this->msg);
a_this->msg = NULL;
}
g_free (a_this);
}
/**
*Pushes an error on the parser error stack.
*@param a_this the current instance of #CRParser.
*@param a_msg the error message.
*@param a_status the error status.
*@return CR_OK upon successful completion, an error code otherwise.
*/
static enum CRStatus
cr_parser_push_error (CRParser * a_this,
const guchar * a_msg, enum CRStatus a_status)
{
enum CRStatus status = CR_OK;
CRParserError *error = NULL;
CRInputPos pos;
g_return_val_if_fail (a_this && PRIVATE (a_this)
&& a_msg, CR_BAD_PARAM_ERROR);
error = cr_parser_error_new (a_msg, a_status);
g_return_val_if_fail (error, CR_ERROR);
RECORD_INITIAL_POS (a_this, &pos);
cr_parser_error_set_pos
(error, pos.line, pos.col, pos.next_byte_index - 1);
PRIVATE (a_this)->err_stack =
g_list_prepend (PRIVATE (a_this)->err_stack, error);
if (PRIVATE (a_this)->err_stack == NULL)
goto error;
return CR_OK;
error:
if (error) {
cr_parser_error_destroy (error);
error = NULL;
}
return status;
}
/**
*Dumps the error stack using g_printerr.
*@param a_this the current instance of #CRParser.
*@param a_clear_errs whether to clear the error stack
*after the dump or not.
*@return CR_OK upon successfull completion, an error code
*otherwise.
*/
static enum CRStatus
cr_parser_dump_err_stack (CRParser * a_this, gboolean a_clear_errs)
{
GList *cur = NULL;
g_return_val_if_fail (a_this && PRIVATE (a_this), CR_BAD_PARAM_ERROR);
if (PRIVATE (a_this)->err_stack == NULL)
return CR_OK;
for (cur = PRIVATE (a_this)->err_stack; cur; cur = cur->next) {
cr_parser_error_dump ((CRParserError *) cur->data);
}
if (a_clear_errs == TRUE) {
cr_parser_clear_errors (a_this);
}
return CR_OK;
}
/**
*Clears all the errors contained in the parser error stack.
*Frees all the errors, and the stack that contains'em.
*@param a_this the current instance of #CRParser.
*/
static enum CRStatus
cr_parser_clear_errors (CRParser * a_this)
{
GList *cur = NULL;
g_return_val_if_fail (a_this && PRIVATE (a_this), CR_BAD_PARAM_ERROR);
for (cur = PRIVATE (a_this)->err_stack; cur; cur = cur->next) {
if (cur->data) {
cr_parser_error_destroy ((CRParserError *)
cur->data);
}
}
if (PRIVATE (a_this)->err_stack) {
g_list_free (PRIVATE (a_this)->err_stack);
PRIVATE (a_this)->err_stack = NULL;
}
return CR_OK;
}
/**
*Same as cr_parser_try_to_skip_spaces() but this one skips
*spaces and comments.
*
*@param a_this the current instance of #CRParser.
*@return CR_OK upon successfull completion, an error code otherwise.
*/
enum CRStatus
cr_parser_try_to_skip_spaces_and_comments (CRParser * a_this)
{
enum CRStatus status = CR_ERROR;
CRToken *token = NULL;
g_return_val_if_fail (a_this && PRIVATE (a_this)
&& PRIVATE (a_this)->tknzr, CR_BAD_PARAM_ERROR);
do {
if (token) {
cr_token_destroy (token);
token = NULL;
}
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr,
&token);
if (status != CR_OK)
goto error;
}
while ((token != NULL)
&& (token->type == COMMENT_TK || token->type == S_TK));
cr_tknzr_unget_token (PRIVATE (a_this)->tknzr, token);
return status;
error:
if (token) {
cr_token_destroy (token);
token = NULL;
}
return status;
}
/***************************************
*End of Parser input handling routines
***************************************/
/*************************************
*Non trivial terminal productions
*parsing routines
*************************************/
/**
*Parses a css stylesheet following the core css grammar.
*This is mainly done for test purposes.
*During the parsing, no callback is called. This is just
*to validate that the stylesheet is well formed according to the
*css core syntax.
*stylesheet : [ CDO | CDC | S | statement ]*;
*@param a_this the current instance of #CRParser.
*@return CR_OK upon successful completion, an error code otherwise.
*/
static enum CRStatus
cr_parser_parse_stylesheet_core (CRParser * a_this)
{
CRToken *token = NULL;
CRInputPos init_pos;
enum CRStatus status = CR_ERROR;
g_return_val_if_fail (a_this && PRIVATE (a_this), CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
continue_parsing:
if (token) {
cr_token_destroy (token);
token = NULL;
}
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
if (status == CR_END_OF_INPUT_ERROR) {
status = CR_OK;
goto done;
} else if (status != CR_OK) {
goto error;
}
switch (token->type) {
case CDO_TK:
case CDC_TK:
goto continue_parsing;
break;
default:
status = cr_tknzr_unget_token (PRIVATE (a_this)->tknzr,
token);
CHECK_PARSING_STATUS (status, TRUE);
token = NULL;
status = cr_parser_parse_statement_core (a_this);
cr_parser_clear_errors (a_this);
if (status == CR_OK) {
goto continue_parsing;
} else if (status == CR_END_OF_INPUT_ERROR) {
goto done;
} else {
goto error;
}
}
done:
if (token) {
cr_token_destroy (token);
token = NULL;
}
cr_parser_clear_errors (a_this);
return CR_OK;
error:
cr_parser_push_error
(a_this, (guchar *)"could not recognize next production", CR_ERROR);
cr_parser_dump_err_stack (a_this, TRUE);
if (token) {
cr_token_destroy (token);
token = NULL;
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/**
*Parses an at-rule as defined by the css core grammar
*in chapter 4.1 in the css2 spec.
*at-rule : ATKEYWORD S* any* [ block | ';' S* ];
*@param a_this the current instance of #CRParser.
*@return CR_OK upon successfull completion, an error code
*otherwise.
*/
static enum CRStatus
cr_parser_parse_atrule_core (CRParser * a_this)
{
CRToken *token = NULL;
CRInputPos init_pos;
enum CRStatus status = CR_ERROR;
g_return_val_if_fail (a_this && PRIVATE (a_this), CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr,
&token);
ENSURE_PARSING_COND (status == CR_OK
&& token
&&
(token->type == ATKEYWORD_TK
|| token->type == IMPORT_SYM_TK
|| token->type == PAGE_SYM_TK
|| token->type == MEDIA_SYM_TK
|| token->type == FONT_FACE_SYM_TK
|| token->type == CHARSET_SYM_TK));
cr_token_destroy (token);
token = NULL;
cr_parser_try_to_skip_spaces_and_comments (a_this);
do {
status = cr_parser_parse_any_core (a_this);
} while (status == CR_OK);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr,
&token);
ENSURE_PARSING_COND (status == CR_OK && token);
if (token->type == CBO_TK) {
cr_tknzr_unget_token (PRIVATE (a_this)->tknzr,
token);
token = NULL;
status = cr_parser_parse_block_core (a_this);
CHECK_PARSING_STATUS (status,
FALSE);
goto done;
} else if (token->type == SEMICOLON_TK) {
goto done;
} else {
status = CR_PARSING_ERROR ;
goto error;
}
done:
if (token) {
cr_token_destroy (token);
token = NULL;
}
return CR_OK;
error:
if (token) {
cr_token_destroy (token);
token = NULL;
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr,
&init_pos);
return status;
}
/**
*Parses a ruleset as defined by the css core grammar in chapter
*4.1 of the css2 spec.
*ruleset ::= selector? '{' S* declaration? [ ';' S* declaration? ]* '}' S*;
*@param a_this the current instance of #CRParser.
*@return CR_OK upon successfull completion, an error code otherwise.
*/
static enum CRStatus
cr_parser_parse_ruleset_core (CRParser * a_this)
{
CRToken *token = NULL;
CRInputPos init_pos;
enum CRStatus status = CR_ERROR;
g_return_val_if_fail (a_this && PRIVATE (a_this), CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
status = cr_parser_parse_selector_core (a_this);
ENSURE_PARSING_COND (status == CR_OK
|| status == CR_PARSING_ERROR
|| status == CR_END_OF_INPUT_ERROR);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK && token
&& token->type == CBO_TK);
cr_token_destroy (token);
token = NULL;
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_parser_parse_declaration_core (a_this);
parse_declaration_list:
if (token) {
cr_token_destroy (token);
token = NULL;
}
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK && token);
if (token->type == CBC_TK) {
goto done;
}
ENSURE_PARSING_COND (status == CR_OK
&& token && token->type == SEMICOLON_TK);
cr_token_destroy (token);
token = NULL;
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_parser_parse_declaration_core (a_this);
cr_parser_clear_errors (a_this);
ENSURE_PARSING_COND (status == CR_OK || status == CR_PARSING_ERROR);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK && token);
if (token->type == CBC_TK) {
cr_token_destroy (token);
token = NULL;
cr_parser_try_to_skip_spaces_and_comments (a_this);
goto done;
} else {
status = cr_tknzr_unget_token (PRIVATE (a_this)->tknzr,
token);
token = NULL;
goto parse_declaration_list;
}
done:
if (token) {
cr_token_destroy (token);
token = NULL;
}
if (status == CR_OK) {
return CR_OK;
}
error:
if (token) {
cr_token_destroy (token);
token = NULL;
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/**
*Parses a "selector" as specified by the css core
*grammar.
*selector : any+;
*@param a_this the current instance of #CRParser.
*@return CR_OK upon successfull completion, an error code
*otherwise.
*/
static enum CRStatus
cr_parser_parse_selector_core (CRParser * a_this)
{
CRToken *token = NULL;
CRInputPos init_pos;
enum CRStatus status = CR_ERROR;
g_return_val_if_fail (a_this && PRIVATE (a_this), CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
status = cr_parser_parse_any_core (a_this);
CHECK_PARSING_STATUS (status, FALSE);
do {
status = cr_parser_parse_any_core (a_this);
} while (status == CR_OK);
return CR_OK;
error:
if (token) {
cr_token_destroy (token);
token = NULL;
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/**
*Parses a "block" as defined in the css core grammar
*in chapter 4.1 of the css2 spec.
*block ::= '{' S* [ any | block | ATKEYWORD S* | ';' ]* '}' S*;
*@param a_this the current instance of #CRParser.
*FIXME: code this function.
*/
static enum CRStatus
cr_parser_parse_block_core (CRParser * a_this)
{
CRToken *token = NULL;
CRInputPos init_pos;
enum CRStatus status = CR_ERROR;
g_return_val_if_fail (a_this && PRIVATE (a_this), CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK && token
&& token->type == CBO_TK);
parse_block_content:
if (token) {
cr_token_destroy (token);
token = NULL;
}
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK && token);
if (token->type == CBC_TK) {
cr_parser_try_to_skip_spaces_and_comments (a_this);
goto done;
} else if (token->type == SEMICOLON_TK) {
goto parse_block_content;
} else if (token->type == ATKEYWORD_TK) {
cr_parser_try_to_skip_spaces_and_comments (a_this);
goto parse_block_content;
} else if (token->type == CBO_TK) {
cr_tknzr_unget_token (PRIVATE (a_this)->tknzr, token);
token = NULL;
status = cr_parser_parse_block_core (a_this);
CHECK_PARSING_STATUS (status, FALSE);
goto parse_block_content;
} else {
cr_tknzr_unget_token (PRIVATE (a_this)->tknzr, token);
token = NULL;
status = cr_parser_parse_any_core (a_this);
CHECK_PARSING_STATUS (status, FALSE);
goto parse_block_content;
}
done:
if (token) {
cr_token_destroy (token);
token = NULL;
}
if (status == CR_OK)
return CR_OK;
error:
if (token) {
cr_token_destroy (token);
token = NULL;
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
static enum CRStatus
cr_parser_parse_declaration_core (CRParser * a_this)
{
CRToken *token = NULL;
CRInputPos init_pos;
enum CRStatus status = CR_ERROR;
CRString *prop = NULL;
g_return_val_if_fail (a_this && PRIVATE (a_this), CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
status = cr_parser_parse_property (a_this, &prop);
CHECK_PARSING_STATUS (status, FALSE);
cr_parser_clear_errors (a_this);
ENSURE_PARSING_COND (status == CR_OK && prop);
cr_string_destroy (prop);
prop = NULL;
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK
&& token
&& token->type == DELIM_TK
&& token->u.unichar == ':');
cr_token_destroy (token);
token = NULL;
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_parser_parse_value_core (a_this);
CHECK_PARSING_STATUS (status, FALSE);
return CR_OK;
error:
if (prop) {
cr_string_destroy (prop);
prop = NULL;
}
if (token) {
cr_token_destroy (token);
token = NULL;
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/**
*Parses a "value" production as defined by the css core grammar
*in chapter 4.1.
*value ::= [ any | block | ATKEYWORD S* ]+;
*@param a_this the current instance of #CRParser.
*@return CR_OK upon successfull completion, an error code otherwise.
*/
static enum CRStatus
cr_parser_parse_value_core (CRParser * a_this)
{
CRToken *token = NULL;
CRInputPos init_pos;
enum CRStatus status = CR_ERROR;
glong ref = 0;
g_return_val_if_fail (a_this && PRIVATE (a_this), CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
continue_parsing:
if (token) {
cr_token_destroy (token);
token = NULL;
}
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK && token);
switch (token->type) {
case CBO_TK:
status = cr_tknzr_unget_token (PRIVATE (a_this)->tknzr,
token);
token = NULL;
status = cr_parser_parse_block_core (a_this);
CHECK_PARSING_STATUS (status, FALSE);
ref++;
goto continue_parsing;
case ATKEYWORD_TK:
cr_parser_try_to_skip_spaces_and_comments (a_this);
ref++;
goto continue_parsing;
default:
status = cr_tknzr_unget_token (PRIVATE (a_this)->tknzr,
token);
token = NULL;
status = cr_parser_parse_any_core (a_this);
if (status == CR_OK) {
ref++;
goto continue_parsing;
} else if (status == CR_PARSING_ERROR) {
status = CR_OK;
goto done;
} else {
goto error;
}
}
done:
if (token) {
cr_token_destroy (token);
token = NULL;
}
if (status == CR_OK && ref)
return CR_OK;
error:
if (token) {
cr_token_destroy (token);
token = NULL;
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/**
*Parses an "any" as defined by the css core grammar in the
*css2 spec in chapter 4.1.
*any ::= [ IDENT | NUMBER | PERCENTAGE | DIMENSION | STRING
* | DELIM | URI | HASH | UNICODE-RANGE | INCLUDES
* | FUNCTION | DASHMATCH | '(' any* ')' | '[' any* ']' ] S*;
*
*@param a_this the current instance of #CRParser.
*@return CR_OK upon successfull completion, an error code otherwise.
*/
static enum CRStatus
cr_parser_parse_any_core (CRParser * a_this)
{
CRToken *token1 = NULL,
*token2 = NULL;
CRInputPos init_pos;
enum CRStatus status = CR_ERROR;
g_return_val_if_fail (a_this, CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token1);
ENSURE_PARSING_COND (status == CR_OK && token1);
switch (token1->type) {
case IDENT_TK:
case NUMBER_TK:
case RGB_TK:
case PERCENTAGE_TK:
case DIMEN_TK:
case EMS_TK:
case EXS_TK:
case LENGTH_TK:
case ANGLE_TK:
case FREQ_TK:
case TIME_TK:
case STRING_TK:
case DELIM_TK:
case URI_TK:
case HASH_TK:
case UNICODERANGE_TK:
case INCLUDES_TK:
case DASHMATCH_TK:
case S_TK:
case COMMENT_TK:
case IMPORTANT_SYM_TK:
status = CR_OK;
break;
case FUNCTION_TK:
/*
*this case isn't specified by the spec but it
*does happen. So we have to handle it.
*We must consider function with parameters.
*We consider parameter as being an "any*" production.
*/
do {
status = cr_parser_parse_any_core (a_this);
} while (status == CR_OK);
ENSURE_PARSING_COND (status == CR_PARSING_ERROR);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr,
&token2);
ENSURE_PARSING_COND (status == CR_OK
&& token2 && token2->type == PC_TK);
break;
case PO_TK:
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr,
&token2);
ENSURE_PARSING_COND (status == CR_OK && token2);
if (token2->type == PC_TK) {
cr_token_destroy (token2);
token2 = NULL;
goto done;
} else {
status = cr_tknzr_unget_token
(PRIVATE (a_this)->tknzr, token2);
token2 = NULL;
}
do {
status = cr_parser_parse_any_core (a_this);
} while (status == CR_OK);
ENSURE_PARSING_COND (status == CR_PARSING_ERROR);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr,
&token2);
ENSURE_PARSING_COND (status == CR_OK
&& token2 && token2->type == PC_TK);
status = CR_OK;
break;
case BO_TK:
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr,
&token2);
ENSURE_PARSING_COND (status == CR_OK && token2);
if (token2->type == BC_TK) {
cr_token_destroy (token2);
token2 = NULL;
goto done;
} else {
status = cr_tknzr_unget_token
(PRIVATE (a_this)->tknzr, token2);
token2 = NULL;
}
do {
status = cr_parser_parse_any_core (a_this);
} while (status == CR_OK);
ENSURE_PARSING_COND (status == CR_PARSING_ERROR);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr,
&token2);
ENSURE_PARSING_COND (status == CR_OK
&& token2 && token2->type == BC_TK);
status = CR_OK;
break;
default:
status = CR_PARSING_ERROR;
goto error;
}
done:
if (token1) {
cr_token_destroy (token1);
token1 = NULL;
}
if (token2) {
cr_token_destroy (token2);
token2 = NULL;
}
return CR_OK;
error:
if (token1) {
cr_token_destroy (token1);
token1 = NULL;
}
if (token2) {
cr_token_destroy (token2);
token2 = NULL;
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/**
*Parses an attribute selector as defined in the css2 spec in
*appendix D.1:
*attrib ::= '[' S* IDENT S* [ [ '=' | INCLUDES | DASHMATCH ] S*
* [ IDENT | STRING ] S* ]? ']'
*
*@param a_this the "this pointer" of the current instance of
*#CRParser .
*@param a_sel out parameter. The successfully parsed attribute selector.
*@return CR_OK upon successfull completion, an error code otherwise.
*/
static enum CRStatus
cr_parser_parse_attribute_selector (CRParser * a_this,
CRAttrSel ** a_sel)
{
enum CRStatus status = CR_OK;
CRInputPos init_pos;
CRToken *token = NULL;
CRAttrSel *result = NULL;
CRParsingLocation location = {0,0,0} ;
g_return_val_if_fail (a_this && a_sel, CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK && token
&& token->type == BO_TK);
cr_parsing_location_copy
(&location, &token->location) ;
cr_token_destroy (token);
token = NULL;
cr_parser_try_to_skip_spaces_and_comments (a_this);
result = cr_attr_sel_new ();
if (!result) {
cr_utils_trace_info ("result failed") ;
status = CR_OUT_OF_MEMORY_ERROR ;
goto error ;
}
cr_parsing_location_copy (&result->location,
&location) ;
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK
&& token && token->type == IDENT_TK);
result->name = token->u.str;
token->u.str = NULL;
cr_token_destroy (token);
token = NULL;
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK && token);
if (token->type == INCLUDES_TK) {
result->match_way = INCLUDES;
goto parse_right_part;
} else if (token->type == DASHMATCH_TK) {
result->match_way = DASHMATCH;
goto parse_right_part;
} else if (token->type == DELIM_TK && token->u.unichar == '=') {
result->match_way = EQUALS;
goto parse_right_part;
} else if (token->type == BC_TK) {
result->match_way = SET;
goto done;
}
parse_right_part:
if (token) {
cr_token_destroy (token);
token = NULL;
}
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK && token);
if (token->type == IDENT_TK) {
result->value = token->u.str;
token->u.str = NULL;
} else if (token->type == STRING_TK) {
result->value = token->u.str;
token->u.str = NULL;
} else {
status = CR_PARSING_ERROR;
goto error;
}
if (token) {
cr_token_destroy (token);
token = NULL;
}
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK && token
&& token->type == BC_TK);
done:
if (token) {
cr_token_destroy (token);
token = NULL;
}
if (*a_sel) {
status = cr_attr_sel_append_attr_sel (*a_sel, result);
CHECK_PARSING_STATUS (status, FALSE);
} else {
*a_sel = result;
}
cr_parser_clear_errors (a_this);
return CR_OK;
error:
if (result) {
cr_attr_sel_destroy (result);
result = NULL;
}
if (token) {
cr_token_destroy (token);
token = NULL;
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/**
*Parses a "property" as specified by the css2 spec at [4.1.1]:
*property : IDENT S*;
*
*@param a_this the "this pointer" of the current instance of #CRParser.
*@param GString a_property out parameter. The parsed property without the
*trailing spaces. If *a_property is NULL, this function allocates a
*new instance of GString and set it content to the parsed property.
*If not, the property is just appended to a_property's previous content.
*In both cases, it is up to the caller to free a_property.
*@return CR_OK upon successfull completion, CR_PARSING_ERROR if the
*next construction was not a "property", or an error code.
*/
static enum CRStatus
cr_parser_parse_property (CRParser * a_this,
CRString ** a_property)
{
enum CRStatus status = CR_OK;
CRInputPos init_pos;
g_return_val_if_fail (a_this && PRIVATE (a_this)
&& PRIVATE (a_this)->tknzr
&& a_property,
CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
status = cr_parser_parse_ident (a_this, a_property);
CHECK_PARSING_STATUS (status, TRUE);
cr_parser_try_to_skip_spaces_and_comments (a_this);
cr_parser_clear_errors (a_this);
return CR_OK;
error:
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/**
*Parses a "term" as defined in the css2 spec, appendix D.1:
*term ::= unary_operator? [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
*
*TODO: handle parsing of 'RGB'
*
*@param a_term out parameter. The successfully parsed term.
*@return CR_OK upon successfull completion, an error code otherwise.
*/
enum CRStatus
cr_parser_parse_term (CRParser * a_this, CRTerm ** a_term)
{
enum CRStatus status = CR_PARSING_ERROR;
CRInputPos init_pos;
CRTerm *result = NULL;
CRTerm *param = NULL;
CRToken *token = NULL;
CRString *func_name = NULL;
CRParsingLocation location = {0,0,0} ;
g_return_val_if_fail (a_this && a_term, CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
result = cr_term_new ();
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr,
&token);
if (status != CR_OK || !token)
goto error;
cr_parsing_location_copy (&location, &token->location) ;
if (token->type == DELIM_TK && token->u.unichar == '+') {
result->unary_op = PLUS_UOP;
cr_token_destroy (token) ;
token = NULL ;
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr,
&token);
if (status != CR_OK || !token)
goto error;
} else if (token->type == DELIM_TK && token->u.unichar == '-') {
result->unary_op = MINUS_UOP;
cr_token_destroy (token) ;
token = NULL ;
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr,
&token);
if (status != CR_OK || !token)
goto error;
}
if (token->type == EMS_TK
|| token->type == EXS_TK
|| token->type == LENGTH_TK
|| token->type == ANGLE_TK
|| token->type == TIME_TK
|| token->type == FREQ_TK
|| token->type == PERCENTAGE_TK
|| token->type == NUMBER_TK) {
status = cr_term_set_number (result, token->u.num);
CHECK_PARSING_STATUS (status, TRUE);
token->u.num = NULL;
status = CR_OK;
} else if (token && token->type == FUNCTION_TK) {
status = cr_tknzr_unget_token (PRIVATE (a_this)->tknzr,
token);
token = NULL;
status = cr_parser_parse_function (a_this, &func_name,
&param);
if (status == CR_OK) {
status = cr_term_set_function (result,
func_name,
param);
CHECK_PARSING_STATUS (status, TRUE);
}
} else if (token && token->type == STRING_TK) {
status = cr_term_set_string (result,
token->u.str);
CHECK_PARSING_STATUS (status, TRUE);
token->u.str = NULL;
} else if (token && token->type == IDENT_TK) {
status = cr_term_set_ident (result, token->u.str);
CHECK_PARSING_STATUS (status, TRUE);
token->u.str = NULL;
} else if (token && token->type == URI_TK) {
status = cr_term_set_uri (result, token->u.str);
CHECK_PARSING_STATUS (status, TRUE);
token->u.str = NULL;
} else if (token && token->type == RGB_TK) {
status = cr_term_set_rgb (result, token->u.rgb);
CHECK_PARSING_STATUS (status, TRUE);
token->u.rgb = NULL;
} else if (token && token->type == UNICODERANGE_TK) {
result->type = TERM_UNICODERANGE;
status = CR_PARSING_ERROR;
} else if (token && token->type == HASH_TK) {
status = cr_term_set_hash (result, token->u.str);
CHECK_PARSING_STATUS (status, TRUE);
token->u.str = NULL;
} else {
status = CR_PARSING_ERROR;
}
if (status != CR_OK) {
goto error;
}
cr_parsing_location_copy (&result->location,
&location) ;
*a_term = cr_term_append_term (*a_term, result);
result = NULL;
cr_parser_try_to_skip_spaces_and_comments (a_this);
if (token) {
cr_token_destroy (token);
token = NULL;
}
cr_parser_clear_errors (a_this);
return CR_OK;
error:
if (result) {
cr_term_destroy (result);
result = NULL;
}
if (token) {
cr_token_destroy (token);
token = NULL;
}
if (param) {
cr_term_destroy (param);
param = NULL;
}
if (func_name) {
cr_string_destroy (func_name);
func_name = NULL;
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/**
*Parses a "simple_selector" as defined by the css2 spec in appendix D.1 :
*element_name? [ HASH | class | attrib | pseudo ]* S*
*and where pseudo is:
*pseudo ::= ':' [ IDENT | FUNCTION S* IDENT S* ')' ]
*
*@Param a_this the "this pointer" of the current instance of #CRParser.
*@param a_sel out parameter. Is set to the successfully parsed simple
*selector.
*@return CR_OK upon successfull completion, an error code otherwise.
*/
static enum CRStatus
cr_parser_parse_simple_selector (CRParser * a_this, CRSimpleSel ** a_sel)
{
enum CRStatus status = CR_ERROR;
CRInputPos init_pos;
CRToken *token = NULL;
CRSimpleSel *sel = NULL;
CRAdditionalSel *add_sel_list = NULL;
gboolean found_sel = FALSE;
guint32 cur_char = 0;
g_return_val_if_fail (a_this && a_sel, CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
if (status != CR_OK)
goto error;
sel = cr_simple_sel_new ();
ENSURE_PARSING_COND (sel);
cr_parsing_location_copy
(&sel->location,
&token->location) ;
if (token && token->type == DELIM_TK
&& token->u.unichar == '*') {
int comb = (int)sel->type_mask | (int) UNIVERSAL_SELECTOR;
sel->type_mask = (enum SimpleSelectorType)comb;
//sel->type_mask |= UNIVERSAL_SELECTOR;
sel->name = cr_string_new_from_string ("*");
found_sel = TRUE;
} else if (token && token->type == IDENT_TK) {
sel->name = token->u.str;
int comb = (int)sel->type_mask | (int) TYPE_SELECTOR;
sel->type_mask = (enum SimpleSelectorType)comb;
//sel->type_mask |= TYPE_SELECTOR;
token->u.str = NULL;
found_sel = TRUE;
} else {
status = cr_tknzr_unget_token
(PRIVATE (a_this)->tknzr,
token);
token = NULL;
}
if (token) {
cr_token_destroy (token);
token = NULL;
}
cr_parser_try_to_skip_spaces_and_comments (a_this);
for (;;) {
if (token) {
cr_token_destroy (token);
token = NULL;
}
status = cr_tknzr_get_next_token
(PRIVATE (a_this)->tknzr,
&token);
if (status != CR_OK)
goto error;
if (token && token->type == HASH_TK) {
/*we parsed an attribute id */
CRAdditionalSel *add_sel = NULL;
add_sel = cr_additional_sel_new_with_type
(ID_ADD_SELECTOR);
add_sel->content.id_name = token->u.str;
token->u.str = NULL;
cr_parsing_location_copy
(&add_sel->location,
&token->location) ;
add_sel_list =
cr_additional_sel_append
(add_sel_list, add_sel);
found_sel = TRUE;
} else if (token && (token->type == DELIM_TK)
&& (token->u.unichar == '.')) {
cr_token_destroy (token);
token = NULL;
status = cr_tknzr_get_next_token
(PRIVATE (a_this)->tknzr, &token);
if (status != CR_OK)
goto error;
if (token && token->type == IDENT_TK) {
CRAdditionalSel *add_sel = NULL;
add_sel = cr_additional_sel_new_with_type
(CLASS_ADD_SELECTOR);
add_sel->content.class_name = token->u.str;
token->u.str = NULL;
add_sel_list =
cr_additional_sel_append
(add_sel_list, add_sel);
found_sel = TRUE;
cr_parsing_location_copy
(&add_sel->location,
& token->location) ;
} else {
status = CR_PARSING_ERROR;
goto error;
}
} else if (token && token->type == BO_TK) {
CRAttrSel *attr_sel = NULL;
CRAdditionalSel *add_sel = NULL;
status = cr_tknzr_unget_token
(PRIVATE (a_this)->tknzr, token);
if (status != CR_OK)
goto error;
token = NULL;
status = cr_parser_parse_attribute_selector
(a_this, &attr_sel);
CHECK_PARSING_STATUS (status, FALSE);
add_sel = cr_additional_sel_new_with_type
(ATTRIBUTE_ADD_SELECTOR);
ENSURE_PARSING_COND (add_sel != NULL);
add_sel->content.attr_sel = attr_sel;
add_sel_list =
cr_additional_sel_append
(add_sel_list, add_sel);
found_sel = TRUE;
cr_parsing_location_copy
(&add_sel->location,
&attr_sel->location) ;
} else if (token && (token->type == DELIM_TK)
&& (token->u.unichar == ':')) {
CRPseudo *pseudo = NULL;
/*try to parse a pseudo */
if (token) {
cr_token_destroy (token);
token = NULL;
}
pseudo = cr_pseudo_new ();
status = cr_tknzr_get_next_token
(PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK && token);
cr_parsing_location_copy
(&pseudo->location,
&token->location) ;
if (token->type == IDENT_TK) {
pseudo->type = IDENT_PSEUDO;
pseudo->name = token->u.str;
token->u.str = NULL;
found_sel = TRUE;
} else if (token->type == FUNCTION_TK) {
pseudo->name = token->u.str;
token->u.str = NULL;
cr_parser_try_to_skip_spaces_and_comments
(a_this);
status = cr_parser_parse_ident
(a_this, &pseudo->extra);
ENSURE_PARSING_COND (status == CR_OK);
READ_NEXT_CHAR (a_this, &cur_char);
ENSURE_PARSING_COND (cur_char == ')');
pseudo->type = FUNCTION_PSEUDO;
found_sel = TRUE;
} else {
status = CR_PARSING_ERROR;
goto error;
}
if (status == CR_OK) {
CRAdditionalSel *add_sel = NULL;
add_sel = cr_additional_sel_new_with_type
(PSEUDO_CLASS_ADD_SELECTOR);
add_sel->content.pseudo = pseudo;
cr_parsing_location_copy
(&add_sel->location,
&pseudo->location) ;
add_sel_list =
cr_additional_sel_append
(add_sel_list, add_sel);
status = CR_OK;
}
} else {
status = cr_tknzr_unget_token
(PRIVATE (a_this)->tknzr, token);
token = NULL;
break;
}
}
if (status == CR_OK && found_sel == TRUE) {
cr_parser_try_to_skip_spaces_and_comments (a_this);
sel->add_sel = add_sel_list;
add_sel_list = NULL;
if (*a_sel == NULL) {
*a_sel = sel;
} else {
cr_simple_sel_append_simple_sel (*a_sel, sel);
}
sel = NULL;
if (token) {
cr_token_destroy (token);
token = NULL;
}
cr_parser_clear_errors (a_this);
return CR_OK;
} else {
status = CR_PARSING_ERROR;
}
error:
if (token) {
cr_token_destroy (token);
token = NULL;
}
if (add_sel_list) {
cr_additional_sel_destroy (add_sel_list);
add_sel_list = NULL;
}
if (sel) {
cr_simple_sel_destroy (sel);
sel = NULL;
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/**
*Parses a "selector" as defined by the css2 spec in appendix D.1:
*selector ::= simple_selector [ combinator simple_selector ]*
*
*@param a_this the this pointer of the current instance of #CRParser.
*@param a_start a pointer to the
*first chararcter of the successfully parsed
*string.
*@param a_end a pointer to the last character of the successfully parsed
*string.
*@return CR_OK upon successfull completion, an error code otherwise.
*/
static enum CRStatus
cr_parser_parse_simple_sels (CRParser * a_this,
CRSimpleSel ** a_sel)
{
enum CRStatus status = CR_ERROR;
CRInputPos init_pos;
CRSimpleSel *sel = NULL;
guint32 cur_char = 0;
g_return_val_if_fail (a_this
&& PRIVATE (a_this)
&& a_sel,
CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
status = cr_parser_parse_simple_selector (a_this, &sel);
CHECK_PARSING_STATUS (status, FALSE);
*a_sel = cr_simple_sel_append_simple_sel (*a_sel, sel);
for (;;) {
guint32 next_char = 0;
int comb = 0;
sel = NULL;
PEEK_NEXT_CHAR (a_this, &next_char);
if (next_char == '+') {
READ_NEXT_CHAR (a_this, &cur_char);
comb = COMB_PLUS;
cr_parser_try_to_skip_spaces_and_comments (a_this);
} else if (next_char == '>') {
READ_NEXT_CHAR (a_this, &cur_char);
comb = COMB_GT;
cr_parser_try_to_skip_spaces_and_comments (a_this);
} else {
comb = COMB_WS;
}
status = cr_parser_parse_simple_selector (a_this, &sel);
if (status != CR_OK)
break;
if (comb && sel) {
sel->combinator = (enum Combinator)comb;
comb = 0;
}
if (sel) {
*a_sel = cr_simple_sel_append_simple_sel (*a_sel,
sel) ;
}
}
cr_parser_clear_errors (a_this);
return CR_OK;
error:
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/**
*Parses a comma separated list of selectors.
*@param a_this the current instance of #CRParser.
*@param a_selector the parsed list of comma separated
*selectors.
*@return CR_OK upon successful completion, an error
*code otherwise.
*/
static enum CRStatus
cr_parser_parse_selector (CRParser * a_this,
CRSelector ** a_selector)
{
enum CRStatus status = CR_OK;
CRInputPos init_pos;
guint32 cur_char = 0,
next_char = 0;
CRSimpleSel *simple_sels = NULL;
CRSelector *selector = NULL;
g_return_val_if_fail (a_this && a_selector, CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
status = cr_parser_parse_simple_sels (a_this, &simple_sels);
CHECK_PARSING_STATUS (status, FALSE);
if (simple_sels) {
selector = cr_selector_append_simple_sel
(selector, simple_sels);
if (selector) {
cr_parsing_location_copy
(&selector->location,
&simple_sels->location) ;
}
simple_sels = NULL;
} else {
status = CR_PARSING_ERROR ;
goto error ;
}
status = cr_tknzr_peek_char (PRIVATE (a_this)->tknzr,
&next_char);
if (status != CR_OK) {
if (status == CR_END_OF_INPUT_ERROR) {
status = CR_OK;
goto okay;
} else {
goto error;
}
}
if (next_char == ',') {
for (;;) {
simple_sels = NULL;
status = cr_tknzr_peek_char (PRIVATE (a_this)->tknzr,
&next_char);
if (status != CR_OK) {
if (status == CR_END_OF_INPUT_ERROR) {
status = CR_OK;
break;
} else {
goto error;
}
}
if (next_char != ',')
break;
/*consume the ',' char */
READ_NEXT_CHAR (a_this, &cur_char);
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_parser_parse_simple_sels
(a_this, &simple_sels);
CHECK_PARSING_STATUS (status, FALSE);
if (simple_sels) {
selector =
cr_selector_append_simple_sel
(selector, simple_sels);
simple_sels = NULL;
}
}
}
okay:
cr_parser_try_to_skip_spaces_and_comments (a_this);
if (!*a_selector) {
*a_selector = selector;
} else {
*a_selector = cr_selector_append (*a_selector, selector);
}
selector = NULL;
return CR_OK;
error:
if (simple_sels) {
cr_simple_sel_destroy (simple_sels);
simple_sels = NULL;
}
if (selector) {
cr_selector_unref (selector);
selector = NULL;
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/**
*Parses a "function" as defined in css spec at appendix D.1:
*function ::= FUNCTION S* expr ')' S*
*FUNCTION ::= ident'('
*
*@param a_this the "this pointer" of the current instance of
*#CRParser.
*
*@param a_func_name out parameter. The parsed function name
*@param a_expr out parameter. The successfully parsed term.
*@return CR_OK upon successfull completion, an error code otherwise.
*/
static enum CRStatus
cr_parser_parse_function (CRParser * a_this,
CRString ** a_func_name,
CRTerm ** a_expr)
{
CRInputPos init_pos;
enum CRStatus status = CR_OK;
CRToken *token = NULL;
CRTerm *expr = NULL;
g_return_val_if_fail (a_this && PRIVATE (a_this)
&& a_func_name,
CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
if (status != CR_OK)
goto error;
if (token && token->type == FUNCTION_TK) {
*a_func_name = token->u.str;
token->u.str = NULL;
} else {
status = CR_PARSING_ERROR;
goto error;
}
cr_token_destroy (token);
token = NULL;
cr_parser_try_to_skip_spaces_and_comments (a_this) ;
status = cr_parser_parse_expr (a_this, &expr);
CHECK_PARSING_STATUS (status, FALSE);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
if (status != CR_OK)
goto error;
ENSURE_PARSING_COND (token && token->type == PC_TK);
cr_token_destroy (token);
token = NULL;
if (expr) {
*a_expr = cr_term_append_term (*a_expr, expr);
expr = NULL;
}
cr_parser_clear_errors (a_this);
return CR_OK;
error:
if (*a_func_name) {
cr_string_destroy (*a_func_name);
*a_func_name = NULL;
}
if (expr) {
cr_term_destroy (expr);
expr = NULL;
}
if (token) {
cr_token_destroy (token);
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/**
*Parses an uri as defined by the css spec [4.1.1]:
* URI ::= url\({w}{string}{w}\)
* |url\({w}([!#$%&*-~]|{nonascii}|{escape})*{w}\)
*
*@param a_this the current instance of #CRParser.
*@param a_str the successfully parsed url.
*@return CR_OK upon successfull completion, an error code otherwise.
*/
static enum CRStatus
cr_parser_parse_uri (CRParser * a_this, CRString ** a_str)
{
enum CRStatus status = CR_PARSING_ERROR;
g_return_val_if_fail (a_this && PRIVATE (a_this)
&& PRIVATE (a_this)->tknzr, CR_BAD_PARAM_ERROR);
status = cr_tknzr_parse_token (PRIVATE (a_this)->tknzr,
URI_TK, NO_ET, a_str, NULL);
return status;
}
/**
*Parses a string type as defined in css spec [4.1.1]:
*
*string ::= {string1}|{string2}
*string1 ::= \"([\t !#$%&(-~]|\\{nl}|\'|{nonascii}|{escape})*\"
*string2 ::= \'([\t !#$%&(-~]|\\{nl}|\"|{nonascii}|{escape})*\'
*
*@param a_this the current instance of #CRParser.
*@param a_start out parameter. Upon successfull completion,
*points to the beginning of the string, points to an undefined value
*otherwise.
*@param a_end out parameter. Upon successfull completion, points to
*the beginning of the string, points to an undefined value otherwise.
*@return CR_OK upon successfull completion, an error code otherwise.
*/
static enum CRStatus
cr_parser_parse_string (CRParser * a_this, CRString ** a_str)
{
enum CRStatus status = CR_OK;
g_return_val_if_fail (a_this && PRIVATE (a_this)
&& PRIVATE (a_this)->tknzr
&& a_str, CR_BAD_PARAM_ERROR);
status = cr_tknzr_parse_token (PRIVATE (a_this)->tknzr,
STRING_TK, NO_ET, a_str, NULL);
return status;
}
/**
*Parses an "ident" as defined in css spec [4.1.1]:
*ident ::= {nmstart}{nmchar}*
*
*@param a_this the currens instance of #CRParser.
*
*@param a_str a pointer to parsed ident. If *a_str is NULL,
*this function allocates a new instance of #CRString. If not,
*the function just appends the parsed string to the one passed.
*In both cases it is up to the caller to free *a_str.
*
*@return CR_OK upon successfull completion, an error code
*otherwise.
*/
static enum CRStatus
cr_parser_parse_ident (CRParser * a_this, CRString ** a_str)
{
enum CRStatus status = CR_OK;
g_return_val_if_fail (a_this && PRIVATE (a_this)
&& PRIVATE (a_this)->tknzr
&& a_str, CR_BAD_PARAM_ERROR);
status = cr_tknzr_parse_token (PRIVATE (a_this)->tknzr,
IDENT_TK, NO_ET, a_str, NULL);
return status;
}
/**
*the next rule is ignored as well. This seems to be a bug
*Parses a stylesheet as defined in the css2 spec in appendix D.1:
*stylesheet ::= [ CHARSET_SYM S* STRING S* ';' ]?
* [S|CDO|CDC]* [ import [S|CDO|CDC]* ]*
* [ [ ruleset | media | page | font_face ] [S|CDO|CDC]* ]*
*
*TODO: Finish the code of this function. Think about splitting it into
*smaller functions.
*
*@param a_this the "this pointer" of the current instance of #CRParser.
*@param a_start out parameter. A pointer to the first character of
*the successfully parsed string.
*@param a_end out parameter. A pointer to the first character of
*the successfully parsed string.
*
*@return CR_OK upon successfull completion, an error code otherwise.
*/
static enum CRStatus
cr_parser_parse_stylesheet (CRParser * a_this)
{
enum CRStatus status = CR_OK;
CRInputPos init_pos;
CRToken *token = NULL;
CRString *charset = NULL;
g_return_val_if_fail (a_this && PRIVATE (a_this)
&& PRIVATE (a_this)->tknzr, CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
PRIVATE (a_this)->state = READY_STATE;
if (PRIVATE (a_this)->sac_handler
&& PRIVATE (a_this)->sac_handler->start_document) {
PRIVATE (a_this)->sac_handler->start_document
(PRIVATE (a_this)->sac_handler);
}
parse_charset:
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
if (status == CR_END_OF_INPUT_ERROR)
goto done;
CHECK_PARSING_STATUS (status, TRUE);
if (token && token->type == CHARSET_SYM_TK) {
CRParsingLocation location = {0,0,0} ;
status = cr_tknzr_unget_token (PRIVATE (a_this)->tknzr,
token);
CHECK_PARSING_STATUS (status, TRUE);
token = NULL;
status = cr_parser_parse_charset (a_this,
&charset,
&location);
if (status == CR_OK && charset) {
if (PRIVATE (a_this)->sac_handler
&& PRIVATE (a_this)->sac_handler->charset) {
PRIVATE (a_this)->sac_handler->charset
(PRIVATE (a_this)->sac_handler,
charset, &location);
}
} else if (status != CR_END_OF_INPUT_ERROR) {
status = cr_parser_parse_atrule_core (a_this);
CHECK_PARSING_STATUS (status, FALSE);
}
if (charset) {
cr_string_destroy (charset);
charset = NULL;
}
} else if (token
&& (token->type == S_TK
|| token->type == COMMENT_TK)) {
status = cr_tknzr_unget_token (PRIVATE (a_this)->tknzr,
token);
token = NULL;
CHECK_PARSING_STATUS (status, TRUE);
cr_parser_try_to_skip_spaces_and_comments (a_this);
goto parse_charset ;
} else if (token) {
status = cr_tknzr_unget_token (PRIVATE (a_this)->tknzr,
token);
token = NULL;
CHECK_PARSING_STATUS (status, TRUE);
}
/* parse_imports:*/
do {
if (token) {
cr_token_destroy (token);
token = NULL;
}
cr_parser_try_to_skip_spaces_and_comments (a_this) ;
status = cr_tknzr_get_next_token
(PRIVATE (a_this)->tknzr, &token);
if (status == CR_END_OF_INPUT_ERROR)
goto done;
CHECK_PARSING_STATUS (status, TRUE);
} while (token
&& (token->type == S_TK
|| token->type == CDO_TK || token->type == CDC_TK));
if (token) {
status = cr_tknzr_unget_token (PRIVATE (a_this)->tknzr,
token);
token = NULL;
}
for (;;) {
status = cr_tknzr_get_next_token
(PRIVATE (a_this)->tknzr, &token);
if (status == CR_END_OF_INPUT_ERROR)
goto done;
CHECK_PARSING_STATUS (status, TRUE);
if (token && token->type == IMPORT_SYM_TK) {
GList *media_list = NULL;
CRString *import_string = NULL;
CRParsingLocation location = {0,0,0} ;
status = cr_tknzr_unget_token
(PRIVATE (a_this)->tknzr, token);
token = NULL;
CHECK_PARSING_STATUS (status, TRUE);
status = cr_parser_parse_import (a_this,
&media_list,
&import_string,
&location);
if (status == CR_OK) {
if (import_string
&& PRIVATE (a_this)->sac_handler
&& PRIVATE (a_this)->sac_handler->import_style) {
PRIVATE (a_this)->sac_handler->import_style
(PRIVATE(a_this)->sac_handler,
media_list,
import_string,
NULL, &location) ;
if ((PRIVATE (a_this)->sac_handler->resolve_import == TRUE)) {
/*
*TODO: resolve the
*import rule.
*/
}
if ((PRIVATE (a_this)->sac_handler->import_style_result)) {
PRIVATE (a_this)->sac_handler->import_style_result
(PRIVATE (a_this)->sac_handler,
media_list, import_string,
NULL, NULL);
}
}
} else if (status != CR_END_OF_INPUT_ERROR) {
if (PRIVATE (a_this)->sac_handler
&& PRIVATE (a_this)->sac_handler->error) {
PRIVATE (a_this)->sac_handler->error
(PRIVATE (a_this)->sac_handler);
}
status = cr_parser_parse_atrule_core (a_this);
CHECK_PARSING_STATUS (status, TRUE) ;
} else {
goto error ;
}
/*
*then, after calling the appropriate
*SAC handler, free
*the media_list and import_string.
*/
if (media_list) {
GList *cur = NULL;
/*free the medium list */
for (cur = media_list; cur; cur = cur->next) {
if (cur->data) {
cr_string_destroy ((CRString *)cur->data);
}
}
g_list_free (media_list);
media_list = NULL;
}
if (import_string) {
cr_string_destroy (import_string);
import_string = NULL;
}
cr_parser_try_to_skip_spaces_and_comments (a_this);
} else if (token
&& (token->type == S_TK
|| token->type == CDO_TK
|| token->type == CDC_TK)) {
status = cr_tknzr_unget_token
(PRIVATE (a_this)->tknzr, token);
token = NULL;
do {
if (token) {
cr_token_destroy (token);
token = NULL;
}
status = cr_tknzr_get_next_token
(PRIVATE (a_this)->tknzr, &token);
if (status == CR_END_OF_INPUT_ERROR)
goto done;
CHECK_PARSING_STATUS (status, TRUE);
} while (token
&& (token->type == S_TK
|| token->type == CDO_TK
|| token->type == CDC_TK));
} else {
if (token) {
status = cr_tknzr_unget_token
(PRIVATE (a_this)->tknzr, token);
token = NULL;
}
goto parse_ruleset_and_others;
}
}
parse_ruleset_and_others:
cr_parser_try_to_skip_spaces_and_comments (a_this);
for (;;) {
status = cr_tknzr_get_next_token
(PRIVATE (a_this)->tknzr, &token);
if (status == CR_END_OF_INPUT_ERROR)
goto done;
CHECK_PARSING_STATUS (status, TRUE);
if (token
&& (token->type == S_TK
|| token->type == CDO_TK || token->type == CDC_TK)) {
status = cr_tknzr_unget_token
(PRIVATE (a_this)->tknzr, token);
token = NULL;
do {
if (token) {
cr_token_destroy (token);
token = NULL;
}
cr_parser_try_to_skip_spaces_and_comments
(a_this);
status = cr_tknzr_get_next_token
(PRIVATE (a_this)->tknzr, &token);
} while (token
&& (token->type == S_TK
|| token->type == COMMENT_TK
|| token->type == CDO_TK
|| token->type == CDC_TK));
if (token) {
cr_tknzr_unget_token
(PRIVATE (a_this)->tknzr, token);
token = NULL;
}
} else if (token
&& (token->type == HASH_TK
|| (token->type == DELIM_TK
&& token->u.unichar == '.')
|| (token->type == DELIM_TK
&& token->u.unichar == ':')
|| (token->type == DELIM_TK
&& token->u.unichar == '*')
|| (token->type == BO_TK)
|| token->type == IDENT_TK)) {
/*
*Try to parse a CSS2 ruleset.
*if the parsing fails, try to parse
*a css core ruleset.
*/
status = cr_tknzr_unget_token
(PRIVATE (a_this)->tknzr, token);
CHECK_PARSING_STATUS (status, TRUE);
token = NULL;
status = cr_parser_parse_ruleset (a_this);
if (status == CR_OK) {
continue;
} else {
if (PRIVATE (a_this)->sac_handler
&& PRIVATE (a_this)->sac_handler->error) {
PRIVATE (a_this)->sac_handler->
error
(PRIVATE (a_this)->
sac_handler);
}
status = cr_parser_parse_ruleset_core
(a_this);
if (status == CR_OK) {
continue;
} else {
break;
}
}
} else if (token && token->type == MEDIA_SYM_TK) {
status = cr_tknzr_unget_token
(PRIVATE (a_this)->tknzr, token);
CHECK_PARSING_STATUS (status, TRUE);
token = NULL;
status = cr_parser_parse_media (a_this);
if (status == CR_OK) {
continue;
} else {
if (PRIVATE (a_this)->sac_handler
&& PRIVATE (a_this)->sac_handler->error) {
PRIVATE (a_this)->sac_handler->
error
(PRIVATE (a_this)->
sac_handler);
}
status = cr_parser_parse_atrule_core (a_this);
if (status == CR_OK) {
continue;
} else {
break;
}
}
} else if (token && token->type == PAGE_SYM_TK) {
status = cr_tknzr_unget_token
(PRIVATE (a_this)->tknzr, token);
CHECK_PARSING_STATUS (status, TRUE);
token = NULL;
status = cr_parser_parse_page (a_this);
if (status == CR_OK) {
continue;
} else {
if (PRIVATE (a_this)->sac_handler
&& PRIVATE (a_this)->sac_handler->error) {
PRIVATE (a_this)->sac_handler->
error
(PRIVATE (a_this)->
sac_handler);
}
status = cr_parser_parse_atrule_core (a_this);
if (status == CR_OK) {
continue;
} else {
break;
}
}
} else if (token && token->type == FONT_FACE_SYM_TK) {
status = cr_tknzr_unget_token
(PRIVATE (a_this)->tknzr, token);
CHECK_PARSING_STATUS (status, TRUE);
token = NULL;
status = cr_parser_parse_font_face (a_this);
if (status == CR_OK) {
continue;
} else {
if (PRIVATE (a_this)->sac_handler
&& PRIVATE (a_this)->sac_handler->error) {
PRIVATE (a_this)->sac_handler->
error
(PRIVATE (a_this)->
sac_handler);
}
status = cr_parser_parse_atrule_core (a_this);
if (status == CR_OK) {
continue;
} else {
break;
}
}
} else {
status = cr_tknzr_unget_token
(PRIVATE (a_this)->tknzr, token);
CHECK_PARSING_STATUS (status, TRUE);
token = NULL;
status = cr_parser_parse_statement_core (a_this);
if (status == CR_OK) {
continue;
} else {
break;
}
}
}
done:
if (token) {
cr_token_destroy (token);
token = NULL;
}
if (status == CR_END_OF_INPUT_ERROR || status == CR_OK) {
if (PRIVATE (a_this)->sac_handler
&& PRIVATE (a_this)->sac_handler->end_document) {
PRIVATE (a_this)->sac_handler->end_document
(PRIVATE (a_this)->sac_handler);
}
return CR_OK;
}
cr_parser_push_error
(a_this, (guchar *)"could not recognize next production", CR_ERROR);
if (PRIVATE (a_this)->sac_handler
&& PRIVATE (a_this)->sac_handler->unrecoverable_error) {
PRIVATE (a_this)->sac_handler->
unrecoverable_error (PRIVATE (a_this)->sac_handler);
}
cr_parser_dump_err_stack (a_this, TRUE);
return status;
error:
if (token) {
cr_token_destroy (token);
token = NULL;
}
if (PRIVATE (a_this)->sac_handler
&& PRIVATE (a_this)->sac_handler->unrecoverable_error) {
PRIVATE (a_this)->sac_handler->
unrecoverable_error (PRIVATE (a_this)->sac_handler);
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/****************************************
*Public CRParser Methods
****************************************/
/**
*Creates a new parser to parse data
*coming the input stream given in parameter.
*@param a_input the input stream of the parser.
*Note that the newly created parser will ref
*a_input and unref it when parsing reaches the
*end of the input stream.
*@return the newly created instance of #CRParser,
*or NULL if an error occured.
*/
CRParser *
cr_parser_new (CRTknzr * a_tknzr)
{
enum CRStatus status = CR_OK;
CRParser *result = (CRParser *)g_malloc0 (sizeof (CRParser));
PRIVATE (result) = (CRParserPriv *)g_malloc0 (sizeof (CRParserPriv));
if (a_tknzr) {
status = cr_parser_set_tknzr (result, a_tknzr);
}
g_return_val_if_fail (status == CR_OK, NULL);
return result;
}
/**
*Instanciates a new parser from a memory buffer.
*@param a_buf the buffer to parse.
*@param a_len the length of the data in the buffer.
*@param a_enc the encoding of the input buffer a_buf.
*@param a_free_buf if set to TRUE, a_buf will be freed
*during the destruction of the newly built instance
*of #CRParser. If set to FALSE, it is up to the caller to
*eventually free it.
*@return the newly built parser, or NULL if an error arises.
*/
CRParser *
cr_parser_new_from_buf (guchar * a_buf,
gulong a_len,
enum CREncoding a_enc,
gboolean a_free_buf)
{
CRParser *result = NULL;
CRInput *input = NULL;
g_return_val_if_fail (a_buf, NULL);
input = cr_input_new_from_buf (a_buf, a_len, a_enc, a_free_buf);
g_return_val_if_fail (input, NULL);
result = cr_parser_new_from_input (input);
if (!result) {
cr_input_destroy (input);
input = NULL;
return NULL;
}
return result;
}
CRParser *
cr_parser_new_from_input (CRInput * a_input)
{
CRParser *result = NULL;
CRTknzr *tokenizer = NULL;
if (a_input) {
tokenizer = cr_tknzr_new (a_input);
g_return_val_if_fail (tokenizer, NULL);
}
result = cr_parser_new (tokenizer);
g_return_val_if_fail (result, NULL);
return result;
}
CRParser *
cr_parser_new_from_file (const guchar * a_file_uri, enum CREncoding a_enc)
{
CRParser *result = NULL;
CRTknzr *tokenizer = NULL;
tokenizer = cr_tknzr_new_from_uri (a_file_uri, a_enc);
if (!tokenizer) {
cr_utils_trace_info ("Could not open input file");
return NULL;
}
result = cr_parser_new (tokenizer);
g_return_val_if_fail (result, NULL);
return result;
}
/**
*Sets a SAC document handler to the parser.
*@param a_this the "this pointer" of the current instance of #CRParser.
*@param a_handler the handler to set.
*@return CR_OK upon successfull completion, an error code otherwise.
*/
enum CRStatus
cr_parser_set_sac_handler (CRParser * a_this, CRDocHandler * a_handler)
{
g_return_val_if_fail (a_this, CR_BAD_PARAM_ERROR);
if (PRIVATE (a_this)->sac_handler) {
cr_doc_handler_unref (PRIVATE (a_this)->sac_handler);
}
PRIVATE (a_this)->sac_handler = a_handler;
cr_doc_handler_ref (a_handler);
return CR_OK;
}
/**
*Gets the SAC document handler.
*@param a_this the "this pointer" of the current instance of
*#CRParser.
*@param a_handler out parameter. The returned handler.
*@return CR_OK upon successfull completion, an error code
*otherwise.
*/
enum CRStatus
cr_parser_get_sac_handler (CRParser * a_this, CRDocHandler ** a_handler)
{
g_return_val_if_fail (a_this, CR_BAD_PARAM_ERROR);
*a_handler = PRIVATE (a_this)->sac_handler;
return CR_OK;
}
/**
*Sets the SAC handler associated to the current instance
*of #CRParser to the default SAC handler.
*@param a_this a pointer to the current instance of #CRParser.
*@return CR_OK upon successfull completion, an error code otherwise.
*/
enum CRStatus
cr_parser_set_default_sac_handler (CRParser * a_this)
{
CRDocHandler *default_sac_handler = NULL;
enum CRStatus status = CR_ERROR;
g_return_val_if_fail (a_this && PRIVATE (a_this), CR_BAD_PARAM_ERROR);
default_sac_handler = cr_doc_handler_new ();
cr_doc_handler_set_default_sac_handler (default_sac_handler);
status = cr_parser_set_sac_handler (a_this, default_sac_handler);
if (status != CR_OK) {
cr_doc_handler_destroy (default_sac_handler);
default_sac_handler = NULL;
}
return status;
}
enum CRStatus
cr_parser_set_use_core_grammar (CRParser * a_this,
gboolean a_use_core_grammar)
{
g_return_val_if_fail (a_this && PRIVATE (a_this), CR_BAD_PARAM_ERROR);
PRIVATE (a_this)->use_core_grammar = a_use_core_grammar;
return CR_OK;
}
enum CRStatus
cr_parser_get_use_core_grammar (CRParser * a_this,
gboolean * a_use_core_grammar)
{
g_return_val_if_fail (a_this && PRIVATE (a_this), CR_BAD_PARAM_ERROR);
*a_use_core_grammar = PRIVATE (a_this)->use_core_grammar;
return CR_OK;
}
/**
*Parses a the given in parameter.
*@param a_this a pointer to the current instance of #CRParser.
*@param a_file_uri the uri to the file to load. For the time being,
*only local files are supported.
*@return CR_OK upon successfull completion, an error code otherwise.
*/
enum CRStatus
cr_parser_parse_file (CRParser * a_this,
const guchar * a_file_uri, enum CREncoding a_enc)
{
enum CRStatus status = CR_ERROR;
CRTknzr *tknzr = NULL;
g_return_val_if_fail (a_this && PRIVATE (a_this)
&& a_file_uri, CR_BAD_PARAM_ERROR);
tknzr = cr_tknzr_new_from_uri (a_file_uri, a_enc);
g_return_val_if_fail (tknzr != NULL, CR_ERROR);
status = cr_parser_set_tknzr (a_this, tknzr);
g_return_val_if_fail (status == CR_OK, CR_ERROR);
status = cr_parser_parse (a_this);
return status;
}
/**
*Parses an expression as defined by the css2 spec in appendix
*D.1:
*expr: term [ operator term ]*
*/
enum CRStatus
cr_parser_parse_expr (CRParser * a_this, CRTerm ** a_expr)
{
enum CRStatus status = CR_ERROR;
CRInputPos init_pos;
CRTerm *expr = NULL,
*expr2 = NULL;
guchar next_byte = 0;
gulong nb_terms = 0;
g_return_val_if_fail (a_this && PRIVATE (a_this)
&& a_expr, CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
status = cr_parser_parse_term (a_this, &expr);
CHECK_PARSING_STATUS (status, FALSE);
for (;;) {
guchar operatr = 0;
status = cr_tknzr_peek_byte (PRIVATE (a_this)->tknzr,
1, &next_byte);
if (status != CR_OK) {
if (status == CR_END_OF_INPUT_ERROR) {
/*
if (!nb_terms)
{
goto error ;
}
*/
status = CR_OK;
break;
} else {
goto error;
}
}
if (next_byte == '/' || next_byte == ',') {
READ_NEXT_BYTE (a_this, &operatr);
}
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_parser_parse_term (a_this, &expr2);
if (status != CR_OK || expr2 == NULL) {
status = CR_OK;
break;
}
switch (operatr) {
case '/':
expr2->the_operator = DIVIDE;
break;
case ',':
expr2->the_operator = COMMA;
default:
break;
}
expr = cr_term_append_term (expr, expr2);
expr2 = NULL;
operatr = 0;
nb_terms++;
}
if (status == CR_OK) {
*a_expr = cr_term_append_term (*a_expr, expr);
expr = NULL;
cr_parser_clear_errors (a_this);
return CR_OK;
}
error:
if (expr) {
cr_term_destroy (expr);
expr = NULL;
}
if (expr2) {
cr_term_destroy (expr2);
expr2 = NULL;
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/**
*Parses a declaration priority as defined by
*the css2 grammar in appendix C:
*prio: IMPORTANT_SYM S*
*@param a_this the current instance of #CRParser.
*@param a_prio a string representing the priority.
*Today, only "!important" is returned as only this
*priority is defined by css2.
*/
enum CRStatus
cr_parser_parse_prio (CRParser * a_this, CRString ** a_prio)
{
enum CRStatus status = CR_ERROR;
CRInputPos init_pos;
CRToken *token = NULL;
g_return_val_if_fail (a_this && PRIVATE (a_this)
&& a_prio
&& *a_prio == NULL, CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
if (status == CR_END_OF_INPUT_ERROR) {
goto error;
}
ENSURE_PARSING_COND (status == CR_OK
&& token && token->type == IMPORTANT_SYM_TK);
cr_parser_try_to_skip_spaces_and_comments (a_this);
*a_prio = cr_string_new_from_string ("!important");
cr_token_destroy (token);
token = NULL;
return CR_OK;
error:
if (token) {
cr_token_destroy (token);
token = NULL;
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/**
*TODO: return the parsed priority, so that
*upper layers can take benefit from it.
*Parses a "declaration" as defined by the css2 spec in appendix D.1:
*declaration ::= [property ':' S* expr prio?]?
*
*@param a_this the "this pointer" of the current instance of #CRParser.
*@param a_property the successfully parsed property. The caller
* *must* free the returned pointer.
*@param a_expr the expression that represents the attribute value.
*The caller *must* free the returned pointer.
*@return CR_OK upon successfull completion, an error code otherwise.
*/
enum CRStatus
cr_parser_parse_declaration (CRParser * a_this,
CRString ** a_property,
CRTerm ** a_expr, gboolean * a_important)
{
enum CRStatus status = CR_ERROR;
CRInputPos init_pos;
guint32 cur_char = 0;
CRTerm *expr = NULL;
CRString *prio = NULL;
g_return_val_if_fail (a_this && PRIVATE (a_this)
&& a_property && a_expr
&& a_important, CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
status = cr_parser_parse_property (a_this, a_property);
if (status == CR_END_OF_INPUT_ERROR)
goto error;
CHECK_PARSING_STATUS_ERR
(a_this, status, FALSE,
(guchar *)"while parsing declaration: next property is malformed",
CR_SYNTAX_ERROR);
READ_NEXT_CHAR (a_this, &cur_char);
if (cur_char != ':') {
status = CR_PARSING_ERROR;
cr_parser_push_error
(a_this,
(guchar *)"while parsing declaration: this char must be ':'",
CR_SYNTAX_ERROR);
goto error;
}
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_parser_parse_expr (a_this, &expr);
CHECK_PARSING_STATUS_ERR
(a_this, status, FALSE,
(guchar *)"while parsing declaration: next expression is malformed",
CR_SYNTAX_ERROR);
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_parser_parse_prio (a_this, &prio);
if (prio) {
cr_string_destroy (prio);
prio = NULL;
*a_important = TRUE;
} else {
*a_important = FALSE;
}
if (*a_expr) {
cr_term_append_term (*a_expr, expr);
expr = NULL;
} else {
*a_expr = expr;
expr = NULL;
}
cr_parser_clear_errors (a_this);
return CR_OK;
error:
if (expr) {
cr_term_destroy (expr);
expr = NULL;
}
if (*a_property) {
cr_string_destroy (*a_property);
*a_property = NULL;
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/**
*Parses a statement as defined by the css core grammar in
*chapter 4.1 of the css2 spec.
*statement : ruleset | at-rule;
*@param a_this the current instance of #CRParser.
*@return CR_OK upon successfull completion, an error code otherwise.
*/
enum CRStatus
cr_parser_parse_statement_core (CRParser * a_this)
{
CRToken *token = NULL;
CRInputPos init_pos;
enum CRStatus status = CR_ERROR;
g_return_val_if_fail (a_this && PRIVATE (a_this), CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK && token);
switch (token->type) {
case ATKEYWORD_TK:
case IMPORT_SYM_TK:
case PAGE_SYM_TK:
case MEDIA_SYM_TK:
case FONT_FACE_SYM_TK:
case CHARSET_SYM_TK:
cr_tknzr_unget_token (PRIVATE (a_this)->tknzr, token);
token = NULL;
status = cr_parser_parse_atrule_core (a_this);
CHECK_PARSING_STATUS (status, TRUE);
break;
default:
cr_tknzr_unget_token (PRIVATE (a_this)->tknzr, token);
token = NULL;
status = cr_parser_parse_ruleset_core (a_this);
cr_parser_clear_errors (a_this);
CHECK_PARSING_STATUS (status, TRUE);
}
return CR_OK;
error:
if (token) {
cr_token_destroy (token);
token = NULL;
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/**
*Parses a "ruleset" as defined in the css2 spec at appendix D.1.
*ruleset ::= selector [ ',' S* selector ]*
*'{' S* declaration? [ ';' S* declaration? ]* '}' S*;
*
*This methods calls the the SAC handler on the relevant SAC handler
*callbacks whenever it encounters some specific constructions.
*See the documentation of #CRDocHandler (the SAC handler) to know
*when which SAC handler is called.
*@param a_this the "this pointer" of the current instance of #CRParser.
*@return CR_OK upon successfull completion, an error code otherwise.
*/
enum CRStatus
cr_parser_parse_ruleset (CRParser * a_this)
{
enum CRStatus status = CR_OK;
CRInputPos init_pos;
guint32 cur_char = 0,
next_char = 0;
CRString *property = NULL;
CRTerm *expr = NULL;
CRSimpleSel *simple_sels = NULL;
CRSelector *selector = NULL;
gboolean start_selector = FALSE,
is_important = FALSE;
g_return_val_if_fail (a_this, CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
status = cr_parser_parse_selector (a_this, &selector);
CHECK_PARSING_STATUS (status, FALSE);
READ_NEXT_CHAR (a_this, &cur_char);
ENSURE_PARSING_COND_ERR
(a_this, cur_char == '{',
(guchar *)"while parsing rulset: current char should be '{'",
CR_SYNTAX_ERROR);
if (PRIVATE (a_this)->sac_handler
&& PRIVATE (a_this)->sac_handler->start_selector) {
/*
*the selector is ref counted so that the parser's user
*can choose to keep it.
*/
if (selector) {
cr_selector_ref (selector);
}
PRIVATE (a_this)->sac_handler->start_selector
(PRIVATE (a_this)->sac_handler, selector);
start_selector = TRUE;
}
cr_parser_try_to_skip_spaces_and_comments (a_this);
PRIVATE (a_this)->state = TRY_PARSE_RULESET_STATE;
status = cr_parser_parse_declaration (a_this, &property,
&expr,
&is_important);
if (expr) {
cr_term_ref (expr);
}
if (status == CR_OK
&& PRIVATE (a_this)->sac_handler
&& PRIVATE (a_this)->sac_handler->property) {
PRIVATE (a_this)->sac_handler->property
(PRIVATE (a_this)->sac_handler, property, expr,
is_important);
}
if (status == CR_OK) {
/*
*free the allocated
*'property' and 'term' before parsing
*next declarations.
*/
if (property) {
cr_string_destroy (property);
property = NULL;
}
if (expr) {
cr_term_unref (expr);
expr = NULL;
}
} else {/*status != CR_OK*/
guint32 c = 0 ;
/*
*test if we have reached '}', which
*would mean that we are parsing an empty ruleset (eg. x{ })
*In that case, goto end_of_ruleset.
*/
status = cr_tknzr_peek_char (PRIVATE (a_this)->tknzr, &c) ;
if (status == CR_OK && c == '}') {
status = CR_OK ;
goto end_of_ruleset ;
}
}
CHECK_PARSING_STATUS_ERR
(a_this, status, FALSE,
(guchar *)"while parsing ruleset: next construction should be a declaration",
CR_SYNTAX_ERROR);
for (;;) {
PEEK_NEXT_CHAR (a_this, &next_char);
if (next_char != ';')
break;
/*consume the ';' char */
READ_NEXT_CHAR (a_this, &cur_char);
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_parser_parse_declaration (a_this, &property,
&expr, &is_important);
if (expr) {
cr_term_ref (expr);
}
if (status == CR_OK
&& PRIVATE (a_this)->sac_handler
&& PRIVATE (a_this)->sac_handler->property) {
PRIVATE (a_this)->sac_handler->property
(PRIVATE (a_this)->sac_handler,
property, expr, is_important);
}
if (property) {
cr_string_destroy (property);
property = NULL;
}
if (expr) {
cr_term_unref (expr);
expr = NULL;
}
}
end_of_ruleset:
cr_parser_try_to_skip_spaces_and_comments (a_this);
READ_NEXT_CHAR (a_this, &cur_char);
ENSURE_PARSING_COND_ERR
(a_this, cur_char == '}',
(guchar *)"while parsing rulset: current char must be a '}'",
CR_SYNTAX_ERROR);
if (PRIVATE (a_this)->sac_handler
&& PRIVATE (a_this)->sac_handler->end_selector) {
PRIVATE (a_this)->sac_handler->end_selector
(PRIVATE (a_this)->sac_handler, selector);
start_selector = FALSE;
}
if (expr) {
cr_term_unref (expr);
expr = NULL;
}
if (simple_sels) {
cr_simple_sel_destroy (simple_sels);
simple_sels = NULL;
}
if (selector) {
cr_selector_unref (selector);
selector = NULL;
}
cr_parser_clear_errors (a_this);
PRIVATE (a_this)->state = RULESET_PARSED_STATE;
return CR_OK;
error:
if (start_selector == TRUE
&& PRIVATE (a_this)->sac_handler
&& PRIVATE (a_this)->sac_handler->error) {
PRIVATE (a_this)->sac_handler->error
(PRIVATE (a_this)->sac_handler);
}
if (expr) {
cr_term_unref (expr);
expr = NULL;
}
if (simple_sels) {
cr_simple_sel_destroy (simple_sels);
simple_sels = NULL;
}
if (property) {
cr_string_destroy (property);
}
if (selector) {
cr_selector_unref (selector);
selector = NULL;
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/**
*Parses an 'import' declaration as defined in the css2 spec
*in appendix D.1:
*
*import ::=
*@import [STRING|URI] S* [ medium [ ',' S* medium]* ]? ';' S*
*
*@param a_this the "this pointer" of the current instance
*of #CRParser.
*
*@param a_medium_list out parameter. A linked list of
*#CRString
*Each CRString is a string that contains
*a 'medium' declaration part of the successfully
*parsed 'import' declaration.
*
*@param a_import_string out parameter.
*A string that contains the 'import
*string". The import string can be either an uri (if it starts with
*the substring "uri(") or a any other css2 string. Note that
* *a_import_string must be initially set to NULL or else, this function
*will return CR_BAD_PARAM_ERROR.
*
*@return CR_OK upon sucessfull completion, an error code otherwise.
*/
enum CRStatus
cr_parser_parse_import (CRParser * a_this,
GList ** a_media_list,
CRString ** a_import_string,
CRParsingLocation *a_location)
{
enum CRStatus status = CR_OK;
CRInputPos init_pos;
guint32 cur_char = 0,
next_char = 0;
CRString *medium = NULL;
g_return_val_if_fail (a_this
&& a_import_string
&& (*a_import_string == NULL),
CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
if (BYTE (a_this, 1, NULL) == '@'
&& BYTE (a_this, 2, NULL) == 'i'
&& BYTE (a_this, 3, NULL) == 'm'
&& BYTE (a_this, 4, NULL) == 'p'
&& BYTE (a_this, 5, NULL) == 'o'
&& BYTE (a_this, 6, NULL) == 'r'
&& BYTE (a_this, 7, NULL) == 't') {
SKIP_CHARS (a_this, 1);
if (a_location) {
cr_parser_get_parsing_location
(a_this, a_location) ;
}
SKIP_CHARS (a_this, 6);
status = CR_OK;
} else {
status = CR_PARSING_ERROR;
goto error;
}
cr_parser_try_to_skip_spaces_and_comments (a_this);
PRIVATE (a_this)->state = TRY_PARSE_IMPORT_STATE;
PEEK_NEXT_CHAR (a_this, &next_char);
if (next_char == '"' || next_char == '\'') {
status = cr_parser_parse_string (a_this, a_import_string);
CHECK_PARSING_STATUS (status, FALSE);
} else {
status = cr_parser_parse_uri (a_this, a_import_string);
CHECK_PARSING_STATUS (status, FALSE);
}
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_parser_parse_ident (a_this, &medium);
if (status == CR_OK && medium) {
*a_media_list = g_list_append (*a_media_list, medium);
medium = NULL;
}
cr_parser_try_to_skip_spaces_and_comments (a_this);
for (; status == CR_OK;) {
if ((status = cr_tknzr_peek_char (PRIVATE (a_this)->tknzr,
&next_char)) != CR_OK) {
if (status == CR_END_OF_INPUT_ERROR) {
status = CR_OK;
goto okay;
}
goto error;
}
if (next_char == ',') {
READ_NEXT_CHAR (a_this, &cur_char);
} else {
break;
}
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_parser_parse_ident (a_this, &medium);
cr_parser_try_to_skip_spaces_and_comments (a_this);
if ((status == CR_OK) && medium) {
*a_media_list = g_list_append (*a_media_list, medium);
medium = NULL;
}
CHECK_PARSING_STATUS (status, FALSE);
cr_parser_try_to_skip_spaces_and_comments (a_this);
}
cr_parser_try_to_skip_spaces_and_comments (a_this);
READ_NEXT_CHAR (a_this, &cur_char);
ENSURE_PARSING_COND (cur_char == ';');
cr_parser_try_to_skip_spaces_and_comments (a_this);
okay:
cr_parser_clear_errors (a_this);
PRIVATE (a_this)->state = IMPORT_PARSED_STATE;
return CR_OK;
error:
if (*a_media_list) {
GList *cur = NULL;
/*
*free each element of *a_media_list.
*Note that each element of *a_medium list *must*
*be a GString* or else, the code that is coming next
*will corrupt the memory and lead to hard to debug
*random crashes.
*This is where C++ and its compile time
*type checking mecanism (through STL containers) would
*have prevented us to go through this hassle.
*/
for (cur = *a_media_list; cur; cur = cur->next) {
if (cur->data) {
cr_string_destroy ((CRString *)cur->data);
}
}
g_list_free (*a_media_list);
*a_media_list = NULL;
}
if (*a_import_string) {
cr_string_destroy (*a_import_string);
*a_import_string = NULL;
}
if (medium) {
cr_string_destroy (medium);
medium = NULL;
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/**
*Parses a 'media' declaration as specified in the css2 spec at
*appendix D.1:
*
*media ::= @media S* medium [ ',' S* medium ]* '{' S* ruleset* '}' S*
*
*Note that this function calls the required sac handlers during the parsing
*to notify media productions. See #CRDocHandler to know the callback called
*during @media parsing.
*@param a_this the "this pointer" of the current instance of #CRParser.
*@return CR_OK upon successfull completion, an error code otherwise.
*/
enum CRStatus
cr_parser_parse_media (CRParser * a_this)
{
enum CRStatus status = CR_OK;
CRInputPos init_pos;
CRToken *token = NULL;
guint32 next_char = 0,
cur_char = 0;
CRString *medium = NULL;
GList *media_list = NULL;
CRParsingLocation location = {0,0,0} ;
g_return_val_if_fail (a_this
&& PRIVATE (a_this),
CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr,
&token);
ENSURE_PARSING_COND (status == CR_OK
&& token
&& token->type == MEDIA_SYM_TK);
cr_parsing_location_copy (&location, &token->location) ;
cr_token_destroy (token);
token = NULL;
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK
&& token && token->type == IDENT_TK);
medium = token->u.str;
token->u.str = NULL;
cr_token_destroy (token);
token = NULL;
if (medium) {
media_list = g_list_append (media_list, medium);
medium = NULL;
}
for (; status == CR_OK;) {
cr_parser_try_to_skip_spaces_and_comments (a_this);
PEEK_NEXT_CHAR (a_this, &next_char);
if (next_char == ',') {
READ_NEXT_CHAR (a_this, &cur_char);
} else {
break;
}
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_parser_parse_ident (a_this, &medium);
CHECK_PARSING_STATUS (status, FALSE);
if (medium) {
media_list = g_list_append (media_list, medium);
medium = NULL;
}
}
READ_NEXT_CHAR (a_this, &cur_char);
ENSURE_PARSING_COND (cur_char == '{');
/*
*call the SAC handler api here.
*/
if (PRIVATE (a_this)->sac_handler
&& PRIVATE (a_this)->sac_handler->start_media) {
PRIVATE (a_this)->sac_handler->start_media
(PRIVATE (a_this)->sac_handler, media_list,
&location);
}
cr_parser_try_to_skip_spaces_and_comments (a_this);
PRIVATE (a_this)->state = TRY_PARSE_MEDIA_STATE;
for (; status == CR_OK;) {
status = cr_parser_parse_ruleset (a_this);
cr_parser_try_to_skip_spaces_and_comments (a_this);
}
READ_NEXT_CHAR (a_this, &cur_char);
ENSURE_PARSING_COND (cur_char == '}');
/*
*call the right SAC handler api here.
*/
if (PRIVATE (a_this)->sac_handler
&& PRIVATE (a_this)->sac_handler->end_media) {
PRIVATE (a_this)->sac_handler->end_media
(PRIVATE (a_this)->sac_handler, media_list);
}
cr_parser_try_to_skip_spaces_and_comments (a_this);
/*
*Then, free the data structures passed to
*the last call to the SAC handler.
*/
if (medium) {
cr_string_destroy (medium);
medium = NULL;
}
if (media_list) {
GList *cur = NULL;
for (cur = media_list; cur; cur = cur->next) {
cr_string_destroy ((CRString *)cur->data);
}
g_list_free (media_list);
media_list = NULL;
}
cr_parser_clear_errors (a_this);
PRIVATE (a_this)->state = MEDIA_PARSED_STATE;
return CR_OK;
error:
if (token) {
cr_token_destroy (token);
token = NULL;
}
if (medium) {
cr_string_destroy (medium);
medium = NULL;
}
if (media_list) {
GList *cur = NULL;
for (cur = media_list; cur; cur = cur->next) {
cr_string_destroy ((CRString *)cur->data);
}
g_list_free (media_list);
media_list = NULL;
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/**
*Parses '@page' rule as specified in the css2 spec in appendix D.1:
*page ::= PAGE_SYM S* IDENT? pseudo_page? S*
*'{' S* declaration [ ';' S* declaration ]* '}' S*
*
*This function also calls the relevant SAC handlers whenever it
*encounters a construction that must
*be reported to the calling application.
*@param a_this the "this pointer" of the current instance of #CRParser.
*@return CR_OK upon successfull completion, an error code otherwise.
*/
enum CRStatus
cr_parser_parse_page (CRParser * a_this)
{
enum CRStatus status = CR_OK;
CRInputPos init_pos;
CRToken *token = NULL;
CRTerm *css_expression = NULL;
CRString *page_selector = NULL,
*page_pseudo_class = NULL,
*property = NULL;
gboolean important = TRUE;
CRParsingLocation location = {0,0,0} ;
g_return_val_if_fail (a_this, CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr,
&token) ;
ENSURE_PARSING_COND (status == CR_OK
&& token
&& token->type == PAGE_SYM_TK);
cr_parsing_location_copy (&location, &token->location) ;
cr_token_destroy (token);
token = NULL;
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK && token);
if (token->type == IDENT_TK) {
page_selector = token->u.str;
token->u.str = NULL;
cr_token_destroy (token);
token = NULL;
} else {
cr_tknzr_unget_token (PRIVATE (a_this)->tknzr, token);
token = NULL;
}
/*
*try to parse pseudo_page
*/
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK && token);
if (token->type == DELIM_TK && token->u.unichar == ':') {
cr_token_destroy (token);
token = NULL;
status = cr_parser_parse_ident (a_this, &page_pseudo_class);
CHECK_PARSING_STATUS (status, FALSE);
} else {
cr_tknzr_unget_token (PRIVATE (a_this)->tknzr, token);
token = NULL;
}
/*
*parse_block
*
*/
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK && token
&& token->type == CBO_TK);
cr_token_destroy (token);
token = NULL;
/*
*Call the appropriate SAC handler here.
*/
if (PRIVATE (a_this)->sac_handler
&& PRIVATE (a_this)->sac_handler->start_page) {
PRIVATE (a_this)->sac_handler->start_page
(PRIVATE (a_this)->sac_handler,
page_selector, page_pseudo_class,
&location);
}
cr_parser_try_to_skip_spaces_and_comments (a_this);
PRIVATE (a_this)->state = TRY_PARSE_PAGE_STATE;
status = cr_parser_parse_declaration (a_this, &property,
&css_expression,
&important);
ENSURE_PARSING_COND (status == CR_OK);
/*
*call the relevant SAC handler here...
*/
if (PRIVATE (a_this)->sac_handler
&& PRIVATE (a_this)->sac_handler->property) {
if (css_expression)
cr_term_ref (css_expression);
PRIVATE (a_this)->sac_handler->property
(PRIVATE (a_this)->sac_handler,
property, css_expression, important);
}
/*
*... and free the data structure passed to that last
*SAC handler.
*/
if (property) {
cr_string_destroy (property);
property = NULL;
}
if (css_expression) {
cr_term_unref (css_expression);
css_expression = NULL;
}
for (;;) {
/*parse the other ';' separated declarations */
if (token) {
cr_token_destroy (token);
token = NULL;
}
status = cr_tknzr_get_next_token
(PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK && token);
if (token->type != SEMICOLON_TK) {
cr_tknzr_unget_token
(PRIVATE (a_this)->tknzr,
token);
token = NULL ;
break;
}
cr_token_destroy (token);
token = NULL;
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_parser_parse_declaration (a_this, &property,
&css_expression,
&important);
if (status != CR_OK)
break ;
/*
*call the relevant SAC handler here...
*/
if (PRIVATE (a_this)->sac_handler
&& PRIVATE (a_this)->sac_handler->property) {
cr_term_ref (css_expression);
PRIVATE (a_this)->sac_handler->property
(PRIVATE (a_this)->sac_handler,
property, css_expression, important);
}
/*
*... and free the data structure passed to that last
*SAC handler.
*/
if (property) {
cr_string_destroy (property);
property = NULL;
}
if (css_expression) {
cr_term_unref (css_expression);
css_expression = NULL;
}
}
cr_parser_try_to_skip_spaces_and_comments
(a_this) ;
if (token) {
cr_token_destroy (token) ;
token = NULL ;
}
status = cr_tknzr_get_next_token
(PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK
&& token
&& token->type == CBC_TK) ;
cr_token_destroy (token) ;
token = NULL ;
/*
*call the relevant SAC handler here.
*/
if (PRIVATE (a_this)->sac_handler
&& PRIVATE (a_this)->sac_handler->end_page) {
PRIVATE (a_this)->sac_handler->end_page
(PRIVATE (a_this)->sac_handler,
page_selector, page_pseudo_class);
}
if (page_selector) {
cr_string_destroy (page_selector);
page_selector = NULL;
}
if (page_pseudo_class) {
cr_string_destroy (page_pseudo_class);
page_pseudo_class = NULL;
}
cr_parser_try_to_skip_spaces_and_comments (a_this);
/*here goes the former implem of this function ... */
cr_parser_clear_errors (a_this);
PRIVATE (a_this)->state = PAGE_PARSED_STATE;
return CR_OK;
error:
if (token) {
cr_token_destroy (token);
token = NULL;
}
if (page_selector) {
cr_string_destroy (page_selector);
page_selector = NULL;
}
if (page_pseudo_class) {
cr_string_destroy (page_pseudo_class);
page_pseudo_class = NULL;
}
if (property) {
cr_string_destroy (property);
property = NULL;
}
if (css_expression) {
cr_term_destroy (css_expression);
css_expression = NULL;
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/**
*Parses a charset declaration as defined implictly by the css2 spec in
*appendix D.1:
*charset ::= CHARSET_SYM S* STRING S* ';'
*
*@param a_this the "this pointer" of the current instance of #CRParser.
*@param a_value out parameter. The actual parsed value of the charset
*declararation. Note that for safety check reasons, *a_value must be
*set to NULL.
*@param a_charset_sym_location the parsing location of
*@return CR_OK upon successfull completion, an error code otherwise.
*/
enum CRStatus
cr_parser_parse_charset (CRParser * a_this, CRString ** a_value,
CRParsingLocation *a_charset_sym_location)
{
enum CRStatus status = CR_OK;
CRInputPos init_pos;
CRToken *token = NULL;
CRString *charset_str = NULL;
g_return_val_if_fail (a_this && a_value
&& (*a_value == NULL),
CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK
&& token && token->type == CHARSET_SYM_TK);
if (a_charset_sym_location) {
cr_parsing_location_copy (a_charset_sym_location,
&token->location) ;
}
cr_token_destroy (token);
token = NULL;
PRIVATE (a_this)->state = TRY_PARSE_CHARSET_STATE;
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK
&& token && token->type == STRING_TK);
charset_str = token->u.str;
token->u.str = NULL;
cr_token_destroy (token);
token = NULL;
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK
&& token && token->type == SEMICOLON_TK);
cr_token_destroy (token);
token = NULL;
if (charset_str) {
*a_value = charset_str;
charset_str = NULL;
}
PRIVATE (a_this)->state = CHARSET_PARSED_STATE;
return CR_OK;
error:
if (token) {
cr_token_destroy (token);
token = NULL;
}
if (*a_value) {
cr_string_destroy (*a_value);
*a_value = NULL;
}
if (charset_str) {
cr_string_destroy (charset_str);
charset_str = NULL;
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/**
*Parses the "@font-face" rule specified in the css1 spec in
*appendix D.1:
*
*font_face ::= FONT_FACE_SYM S*
*'{' S* declaration [ ';' S* declaration ]* '}' S*
*
*This function will call SAC handlers whenever it is necessary.
*@return CR_OK upon successfull completion, an error code otherwise.
*/
enum CRStatus
cr_parser_parse_font_face (CRParser * a_this)
{
enum CRStatus status = CR_ERROR;
CRInputPos init_pos;
CRString *property = NULL;
CRTerm *css_expression = NULL;
CRToken *token = NULL;
gboolean important = FALSE;
guint32 next_char = 0,
cur_char = 0;
CRParsingLocation location = {0,0,0} ;
g_return_val_if_fail (a_this, CR_BAD_PARAM_ERROR);
RECORD_INITIAL_POS (a_this, &init_pos);
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr, &token);
ENSURE_PARSING_COND (status == CR_OK
&& token
&& token->type == FONT_FACE_SYM_TK);
cr_parser_try_to_skip_spaces_and_comments (a_this);
if (token) {
cr_parsing_location_copy (&location,
&token->location) ;
cr_token_destroy (token);
token = NULL;
}
status = cr_tknzr_get_next_token (PRIVATE (a_this)->tknzr,
&token);
ENSURE_PARSING_COND (status == CR_OK && token
&& token->type == CBO_TK);
if (token) {
cr_token_destroy (token);
token = NULL;
}
/*
*here, call the relevant SAC handler.
*/
if (PRIVATE (a_this)->sac_handler
&& PRIVATE (a_this)->sac_handler->start_font_face) {
PRIVATE (a_this)->sac_handler->start_font_face
(PRIVATE (a_this)->sac_handler, &location);
}
PRIVATE (a_this)->state = TRY_PARSE_FONT_FACE_STATE;
/*
*and resume the parsing.
*/
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_parser_parse_declaration (a_this, &property,
&css_expression, &important);
if (status == CR_OK) {
/*
*here, call the relevant SAC handler.
*/
cr_term_ref (css_expression);
if (PRIVATE (a_this)->sac_handler &&
PRIVATE (a_this)->sac_handler->property) {
PRIVATE (a_this)->sac_handler->property
(PRIVATE (a_this)->sac_handler,
property, css_expression, important);
}
ENSURE_PARSING_COND (css_expression && property);
}
/*free the data structures allocated during last parsing. */
if (property) {
cr_string_destroy (property);
property = NULL;
}
if (css_expression) {
cr_term_unref (css_expression);
css_expression = NULL;
}
for (;;) {
PEEK_NEXT_CHAR (a_this, &next_char);
if (next_char == ';') {
READ_NEXT_CHAR (a_this, &cur_char);
} else {
break;
}
cr_parser_try_to_skip_spaces_and_comments (a_this);
status = cr_parser_parse_declaration (a_this,
&property,
&css_expression,
&important);
if (status != CR_OK)
break;
/*
*here, call the relevant SAC handler.
*/
cr_term_ref (css_expression);
if (PRIVATE (a_this)->sac_handler->property) {
PRIVATE (a_this)->sac_handler->property
(PRIVATE (a_this)->sac_handler,
property, css_expression, important);
}
/*
*Then, free the data structures allocated during
*last parsing.
*/
if (property) {
cr_string_destroy (property);
property = NULL;
}
if (css_expression) {
cr_term_unref (css_expression);
css_expression = NULL;
}
}
cr_parser_try_to_skip_spaces_and_comments (a_this);
READ_NEXT_CHAR (a_this, &cur_char);
ENSURE_PARSING_COND (cur_char == '}');
/*
*here, call the relevant SAC handler.
*/
if (PRIVATE (a_this)->sac_handler->end_font_face) {
PRIVATE (a_this)->sac_handler->end_font_face
(PRIVATE (a_this)->sac_handler);
}
cr_parser_try_to_skip_spaces_and_comments (a_this);
if (token) {
cr_token_destroy (token);
token = NULL;
}
cr_parser_clear_errors (a_this);
PRIVATE (a_this)->state = FONT_FACE_PARSED_STATE;
return CR_OK;
error:
if (token) {
cr_token_destroy (token);
token = NULL;
}
if (property) {
cr_string_destroy (property);
property = NULL;
}
if (css_expression) {
cr_term_destroy (css_expression);
css_expression = NULL;
}
cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
return status;
}
/**
*Parses the data that comes from the
*input previously associated to the current instance of
*#CRParser.
*@param a_this the current instance of #CRParser.
*@return CR_OK ;
*/
enum CRStatus
cr_parser_parse (CRParser * a_this)
{
enum CRStatus status = CR_ERROR;
g_return_val_if_fail (a_this && PRIVATE (a_this)
&& PRIVATE (a_this)->tknzr, CR_BAD_PARAM_ERROR);
if (PRIVATE (a_this)->use_core_grammar == FALSE) {
status = cr_parser_parse_stylesheet (a_this);
} else {
status = cr_parser_parse_stylesheet_core (a_this);
}
return status;
}
enum CRStatus
cr_parser_set_tknzr (CRParser * a_this, CRTknzr * a_tknzr)
{
g_return_val_if_fail (a_this && PRIVATE (a_this), CR_BAD_PARAM_ERROR);
if (PRIVATE (a_this)->tknzr) {
cr_tknzr_unref (PRIVATE (a_this)->tknzr);
}
PRIVATE (a_this)->tknzr = a_tknzr;
if (a_tknzr)
cr_tknzr_ref (a_tknzr);
return CR_OK;
}
/**
*Getter of the parser's underlying tokenizer
*@param a_this the current instance of #CRParser
*@param a_tknzr out parameter. The returned tokenizer
*@return CR_OK upon succesful completion, an error code
*otherwise
*/
enum CRStatus
cr_parser_get_tknzr (CRParser * a_this, CRTknzr ** a_tknzr)
{
g_return_val_if_fail (a_this && PRIVATE (a_this)
&& a_tknzr, CR_BAD_PARAM_ERROR);
*a_tknzr = PRIVATE (a_this)->tknzr;
return CR_OK;
}
/**
*Gets the current parsing location.
*@param a_this the current instance of #CRParser
*@param a_loc the parsing location to get.
*@return CR_OK upon succesful completion, an error code
*otherwise.
*/
enum CRStatus
cr_parser_get_parsing_location (CRParser *a_this,
CRParsingLocation *a_loc)
{
g_return_val_if_fail (a_this
&& PRIVATE (a_this)
&& a_loc, CR_BAD_PARAM_ERROR) ;
return cr_tknzr_get_parsing_location
(PRIVATE (a_this)->tknzr, a_loc) ;
}
/**
*Parses a stylesheet from a buffer
*@param a_this the current instance of #CRparser
*@param a_buf the input buffer
*@param a_len the length of the input buffer
*@param a_enc the encoding of the buffer
*@return CR_OK upon successful completion, an error code otherwise.
*/
enum CRStatus
cr_parser_parse_buf (CRParser * a_this,
const guchar * a_buf,
gulong a_len, enum CREncoding a_enc)
{
enum CRStatus status = CR_ERROR;
CRTknzr *tknzr = NULL;
g_return_val_if_fail (a_this && PRIVATE (a_this)
&& a_buf, CR_BAD_PARAM_ERROR);
tknzr = cr_tknzr_new_from_buf ((guchar*)a_buf, a_len, a_enc, FALSE);
g_return_val_if_fail (tknzr != NULL, CR_ERROR);
status = cr_parser_set_tknzr (a_this, tknzr);
g_return_val_if_fail (status == CR_OK, CR_ERROR);
status = cr_parser_parse (a_this);
return status;
}
/**
*Destroys the current instance
*of #CRParser.
*@param a_this the current instance of #CRParser to
*destroy.
*/
void
cr_parser_destroy (CRParser * a_this)
{
g_return_if_fail (a_this && PRIVATE (a_this));
if (PRIVATE (a_this)->tknzr) {
if (cr_tknzr_unref (PRIVATE (a_this)->tknzr) == TRUE)
PRIVATE (a_this)->tknzr = NULL;
}
if (PRIVATE (a_this)->sac_handler) {
cr_doc_handler_unref (PRIVATE (a_this)->sac_handler);
PRIVATE (a_this)->sac_handler = NULL;
}
if (PRIVATE (a_this)->err_stack) {
cr_parser_clear_errors (a_this);
PRIVATE (a_this)->err_stack = NULL;
}
if (PRIVATE (a_this)) {
g_free (PRIVATE (a_this));
PRIVATE (a_this) = NULL;
}
if (a_this) {
g_free (a_this);
a_this = NULL; /*useless. Just for the sake of coherence */
}
}