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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 17:54:43 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 17:54:43 +0000
commite4283f6d48b98e764b988b43bbc86b9d52e6ec94 (patch)
treec8f7f7a6c2f5faa2942d27cefc6fd46cca492656 /src/st/croco/cr-parser.c
parentInitial commit. (diff)
downloadgnome-shell-e4283f6d48b98e764b988b43bbc86b9d52e6ec94.tar.xz
gnome-shell-e4283f6d48b98e764b988b43bbc86b9d52e6ec94.zip
Adding upstream version 43.9.upstream/43.9upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--src/st/croco/cr-parser.c4539
1 files changed, 4539 insertions, 0 deletions
diff --git a/src/st/croco/cr-parser.c b/src/st/croco/cr-parser.c
new file mode 100644
index 0000000..d4f40cf
--- /dev/null
+++ b/src/st/croco/cr-parser.c
@@ -0,0 +1,4539 @@
+/* -*- Mode: C; indent-tabs-mode:nil; c-basic-offset: 8-*- */
+
+/*
+ * This file is part of The Croco Library
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2.1 of the
+ * GNU Lesser General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ *
+ * Author: Dodji Seketeli
+ * See COPYRIGHTS file for copyrights information.
+ */
+
+/**
+ *@CRParser:
+ *
+ *The definition of the #CRParser class.
+ */
+
+#include "string.h"
+#include "cr-parser.h"
+#include "cr-num.h"
+#include "cr-term.h"
+#include "cr-simple-sel.h"
+#include "cr-attr-sel.h"
+
+/*
+ *Random notes:
+ *CSS core syntax vs CSS level 2 syntax
+ *=====================================
+ *
+ *One must keep in mind
+ *that css UA must comply with two syntaxes.
+ *
+ *1/the specific syntax that defines the css language
+ *for a given level of specification (e.g css2 syntax
+ *defined in appendix D.1 of the css2 spec)
+ *
+ *2/the core (general) syntax that is there to allow
+ *UAs to parse style sheets written in levels of CSS that
+ *didn't exist at the time the UAs were created.
+ *
+ *the name of parsing functions (or methods) contained in this file
+ *follows the following scheme: cr_parser_parse_<production_name> (...) ;
+ *where <production_name> is the name
+ *of a production of the css2 language.
+ *When a given production is
+ *defined by the css2 level grammar *and* by the
+ *css core syntax, there will be two functions to parse that production:
+ *one will parse the production defined by the css2 level grammar and the
+ *other will parse the production defined by the css core grammar.
+ *The css2 level grammar related parsing function will be called:
+ *cr_parser_parse_<production_name> (...) ;
+ *Then css core grammar related parsing function will be called:
+ *cr_parser_parse_<production_name>_core (...) ;
+ *
+ *If a production is defined only by the css core grammar, then
+ *it will be named:
+ *cr_parser_parse_<production_name>_core (...) ;
+ */
+
+typedef struct _CRParserError CRParserError;
+
+/**
+ *An abstraction of an error reported by by the
+ *parsing routines.
+ */
+struct _CRParserError {
+ guchar *msg;
+ enum CRStatus status;
+ glong line;
+ glong column;
+ glong byte_num;
+};
+
+enum CRParserState {
+ READY_STATE = 0,
+ TRY_PARSE_CHARSET_STATE,
+ CHARSET_PARSED_STATE,
+ TRY_PARSE_IMPORT_STATE,
+ IMPORT_PARSED_STATE,
+ TRY_PARSE_RULESET_STATE,
+ RULESET_PARSED_STATE,
+ TRY_PARSE_MEDIA_STATE,
+ MEDIA_PARSED_STATE,
+ TRY_PARSE_PAGE_STATE,
+ PAGE_PARSED_STATE,
+ 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
+
+#define RECURSIVE_CALLERS_LIMIT 100
+
+/**
+ * IS_NUM:
+ *@a_char: the char to test.
+ *return TRUE if the character is a number ([0-9]), FALSE otherwise
+ */
+#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 ; \
+}
+
+/**
+ * CHECK_PARSING_STATUS_ERR:
+ *@a_this: the current instance of #CRParser .
+ *@a_status: the status to check. Is of type enum #CRStatus.
+ *@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. Usually,this must
+ *be set to FALSE.
+ *
+ *same as CHECK_PARSING_STATUS() but this one pushes an error
+ *on the parser error stack when an error arises.
+ *
+ */
+#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) \
+{\
+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 current 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,
+ guint n_calls);
+
+static enum CRStatus cr_parser_parse_block_core (CRParser * a_this,
+ guint n_calls);
+
+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 = NULL;
+
+ result = 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 ((const 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 on stdout.
+ *@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 successful 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;
+}
+
+/**
+ * cr_parser_try_to_skip_spaces_and_comments:
+ *@a_this: the current instance of #CRParser.
+ *
+ *Same as cr_parser_try_to_skip_spaces() but this one skips
+ *spaces and comments.
+ *
+ *Returns CR_OK upon successful 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, (const 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 successful 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, 0);
+ } 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, 0);
+ 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 successful 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 successful 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, 0);
+ CHECK_PARSING_STATUS (status, FALSE);
+
+ do {
+ status = cr_parser_parse_any_core (a_this, 0);
+
+ } 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.
+ *@param n_calls used to limit recursion depth
+ *FIXME: code this function.
+ */
+static enum CRStatus
+cr_parser_parse_block_core (CRParser * a_this,
+ guint n_calls)
+{
+ 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);
+
+ if (n_calls > RECURSIVE_CALLERS_LIMIT)
+ return CR_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, n_calls + 1);
+ 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, n_calls + 1);
+ 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 successful 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, 0);
+ 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, 0);
+ 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.
+ *@param n_calls used to limit recursion depth
+ *@return CR_OK upon successful completion, an error code otherwise.
+ */
+static enum CRStatus
+cr_parser_parse_any_core (CRParser * a_this,
+ guint n_calls)
+{
+ CRToken *token1 = NULL,
+ *token2 = NULL;
+ CRInputPos init_pos;
+ enum CRStatus status = CR_ERROR;
+
+ g_return_val_if_fail (a_this, CR_BAD_PARAM_ERROR);
+
+ if (n_calls > RECURSIVE_CALLERS_LIMIT)
+ return CR_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, n_calls + 1);
+ } 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, n_calls + 1);
+ } 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, n_calls + 1);
+ } 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 successful 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} ;
+
+ 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 successful 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;
+}
+
+/**
+ * cr_parser_parse_term:
+ *@a_term: out parameter. The successfully parsed term.
+ *
+ *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'
+ *
+ *Returns CR_OK upon successful 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} ;
+
+ 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;
+}
+
+/**
+ * cr_parser_parse_simple_selector:
+ *@a_this: the "this pointer" of the current instance of #CRParser.
+ *@a_sel: out parameter. Is set to the successfully parsed simple
+ *selector.
+ *
+ *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* ')' ]
+ *
+ *Returns CR_OK upon successful 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 == '*') {
+ 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;
+ 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;
+
+}
+
+/**
+ * cr_parser_parse_simple_sels:
+ *@a_this: the this pointer of the current instance of #CRParser.
+ *@a_start: a pointer to the
+ *first character of the successfully parsed
+ *string.
+ *@a_end: a pointer to the last character of the successfully parsed
+ *string.
+ *
+ *Parses a "selector" as defined by the css2 spec in appendix D.1:
+ *selector ::= simple_selector [ combinator simple_selector ]*
+ *
+ *Returns CR_OK upon successful 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;
+ enum Combinator 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 = 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;
+}
+
+/**
+ * cr_parser_parse_selector:
+ *@a_this: the current instance of #CRParser.
+ *@a_selector: the parsed list of comma separated
+ *selectors.
+ *
+ *Parses a comma separated list of selectors.
+ *
+ *Returns 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;
+}
+
+/**
+ * cr_parser_parse_function:
+ *@a_this: the "this pointer" of the current instance of #CRParser.
+ *
+ *@a_func_name: out parameter. The parsed function name
+ *@a_expr: out parameter. The successfully parsed term.
+ *
+ *Parses a "function" as defined in css spec at appendix D.1:
+ *function ::= FUNCTION S* expr ')' S*
+ *FUNCTION ::= ident'('
+ *
+ *Returns CR_OK upon successful 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;
+}
+
+/**
+ * cr_parser_parse_uri:
+ *@a_this: the current instance of #CRParser.
+ *@a_str: the successfully parsed url.
+ *
+ *Parses an uri as defined by the css spec [4.1.1]:
+ * URI ::= url\({w}{string}{w}\)
+ * |url\({w}([!#$%&*-~]|{nonascii}|{escape})*{w}\)
+ *
+ *Returns CR_OK upon successful 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;
+}
+
+/**
+ * cr_parser_parse_string:
+ *@a_this: the current instance of #CRParser.
+ *@a_start: out parameter. Upon successful completion,
+ *points to the beginning of the string, points to an undefined value
+ *otherwise.
+ *@a_end: out parameter. Upon successful completion, points to
+ *the beginning of the string, points to an undefined value otherwise.
+ *
+ *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})*\'
+ *
+ *Returns CR_OK upon successful 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 successful 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 successful 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} ;
+ 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} ;
+
+ 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 (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, (const 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
+ ****************************************/
+
+/**
+ * cr_parser_new:
+ * @a_tknzr: the tokenizer to use for the parsing.
+ *
+ *Creates a new parser to parse data
+ *coming the input stream given in parameter.
+ *
+ *Returns the newly created instance of #CRParser,
+ *or NULL if an error occurred.
+ */
+CRParser *
+cr_parser_new (CRTknzr * a_tknzr)
+{
+ CRParser *result = NULL;
+ enum CRStatus status = CR_OK;
+
+ result = g_malloc0 (sizeof (CRParser));
+
+ PRIVATE (result) = 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;
+}
+
+/**
+ * cr_parser_new_from_buf:
+ *@a_buf: the buffer to parse.
+ *@a_len: the length of the data in the buffer.
+ *@a_enc: the encoding of the input buffer a_buf.
+ *@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.
+ *
+ *Instantiates a new parser from a memory buffer.
+ *
+ *Returns 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 && a_len, 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;
+}
+
+/**
+ * cr_parser_new_from_input:
+ * @a_input: the parser input stream to use.
+ *
+ * Returns a newly built parser input.
+ */
+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;
+}
+
+/**
+ * cr_parser_new_from_file:
+ * @a_file_uri: the uri of the file to parse.
+ * @a_enc: the file encoding to use.
+ *
+ * Returns the newly built parser.
+ */
+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;
+}
+
+/**
+ * cr_parser_set_sac_handler:
+ *@a_this: the "this pointer" of the current instance of #CRParser.
+ *@a_handler: the handler to set.
+ *
+ *Sets a SAC document handler to the parser.
+ *
+ *Returns CR_OK upon successful 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;
+}
+
+/**
+ * cr_parser_get_sac_handler:
+ *@a_this: the "this pointer" of the current instance of
+ *#CRParser.
+ *@a_handler: out parameter. The returned handler.
+ *
+ *Gets the SAC document handler.
+ *
+ *Returns CR_OK upon successful 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;
+}
+
+/**
+ * cr_parser_set_default_sac_handler:
+ *@a_this: a pointer to the current instance of #CRParser.
+ *
+ *Sets the SAC handler associated to the current instance
+ *of #CRParser to the default SAC handler.
+ *
+ *Returns CR_OK upon successful 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;
+}
+
+/**
+ * cr_parser_set_use_core_grammar:
+ * @a_this: the current instance of #CRParser.
+ * @a_use_core_grammar: where to parse against the css core grammar.
+ *
+ * Returns CR_OK upon successful completion, an error code otherwise.
+ */
+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;
+}
+
+/**
+ * cr_parser_get_use_core_grammar:
+ * @a_this: the current instance of #CRParser.
+ * @a_use_core_grammar: whether to use the core grammar or not.
+ *
+ * Returns CR_OK upon successful completion, an error code otherwise.
+ */
+enum CRStatus
+cr_parser_get_use_core_grammar (CRParser const * 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;
+}
+
+/**
+ * cr_parser_parse_file:
+ *@a_this: a pointer to the current instance of #CRParser.
+ *@a_file_uri: the uri to the file to load. For the time being,
+ *@a_enc: the encoding of the file to parse.
+ *only local files are supported.
+ *
+ *Parses a the given in parameter.
+ *
+ *Returns CR_OK upon successful 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;
+}
+
+/**
+ * cr_parser_parse_expr:
+ * @a_this: the current instance of #CRParser.
+ * @a_expr: out parameter. the parsed expression.
+ *
+ *Parses an expression as defined by the css2 spec in appendix
+ *D.1:
+ *expr: term [ operator term ]*
+ *
+ *
+ * Returns CR_OK upon successful completion, an error code otherwise.
+ */
+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 operator = 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, &operator);
+ }
+
+ 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 (operator) {
+ case '/':
+ expr2->the_operator = DIVIDE;
+ break;
+ case ',':
+ expr2->the_operator = COMMA;
+
+ default:
+ break;
+ }
+
+ expr = cr_term_append_term (expr, expr2);
+ expr2 = NULL;
+ operator = 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;
+}
+
+/**
+ * cr_parser_parse_prio:
+ *@a_this: the current instance of #CRParser.
+ *@a_prio: a string representing the priority.
+ *Today, only "!important" is returned as only this
+ *priority is defined by css2.
+ *
+ *Parses a declaration priority as defined by
+ *the css2 grammar in appendix C:
+ *prio: IMPORTANT_SYM S*
+ *
+ * Returns CR_OK upon successful completion, an error code otherwise.
+ */
+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;
+}
+
+/**
+ * cr_parser_parse_declaration:
+ *@a_this: the "this pointer" of the current instance of #CRParser.
+ *@a_property: the successfully parsed property. The caller
+ * *must* free the returned pointer.
+ *@a_expr: the expression that represents the attribute value.
+ *The caller *must* free the returned pointer.
+ *
+ *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?]?
+ *
+ *Returns CR_OK upon successful 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,
+ (const 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,
+ (const 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,
+ (const 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;
+}
+
+/**
+ * cr_parser_parse_statement_core:
+ *@a_this: the current instance of #CRParser.
+ *
+ *Parses a statement as defined by the css core grammar in
+ *chapter 4.1 of the css2 spec.
+ *statement : ruleset | at-rule;
+ *
+ *Returns CR_OK upon successful 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;
+}
+
+/**
+ * cr_parser_parse_ruleset:
+ *@a_this: the "this pointer" of the current instance of #CRParser.
+ *
+ *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.
+ *
+ *Returns CR_OK upon successful 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;
+ CRParsingLocation end_parsing_location;
+
+ 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 == '{',
+ (const 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,
+ (const 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);
+ cr_parser_get_parsing_location (a_this, &end_parsing_location);
+ READ_NEXT_CHAR (a_this, &cur_char);
+ ENSURE_PARSING_COND_ERR
+ (a_this, cur_char == '}',
+ (const guchar *) "while parsing rulset: current char must be a '}'",
+ CR_SYNTAX_ERROR);
+
+ selector->location = end_parsing_location;
+ 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;
+}
+
+/**
+ * cr_parser_parse_import:
+ *@a_this: the "this pointer" of the current instance
+ *of #CRParser.
+ *@a_media_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.
+ *@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.
+ *@a_location: the location (line, column) where the import has been parsed
+ *
+ *Parses an 'import' declaration as defined in the css2 spec
+ *in appendix D.1:
+ *
+ *import ::=
+ *\@import [STRING|URI] S* [ medium [ ',' S* medium]* ]? ';' S*
+ *
+ *Returns CR_OK upon successful 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 mechanism (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 (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;
+}
+
+/**
+ * cr_parser_parse_media:
+ *@a_this: the "this pointer" of the current instance of #CRParser.
+ *
+ *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.
+ *
+ *Returns CR_OK upon successful 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} ;
+
+ 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 (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 (cur->data);
+ }
+
+ g_list_free (media_list);
+ media_list = NULL;
+ }
+
+ cr_tknzr_set_cur_pos (PRIVATE (a_this)->tknzr, &init_pos);
+
+ return status;
+}
+
+/**
+ * cr_parser_parse_page:
+ *@a_this: the "this pointer" of the current instance of #CRParser.
+ *
+ *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.
+ *
+ *Returns CR_OK upon successful 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} ;
+
+ 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;
+}
+
+/**
+ * cr_parser_parse_charset:
+ *@a_this: the "this pointer" of the current instance of #CRParser.
+ *@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.
+ *@a_charset_sym_location: the parsing location of the charset rule
+ *
+ *Parses a charset declaration as defined implicitly by the css2 spec in
+ *appendix D.1:
+ *charset ::= CHARSET_SYM S* STRING S* ';'
+ *
+ *Returns CR_OK upon successful 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;
+}
+
+/**
+ * cr_parser_parse_font_face:
+ *@a_this: the current instance of #CRParser.
+ *
+ *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.
+ *
+ *Returns CR_OK upon successful 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} ;
+
+ 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;
+}
+
+/**
+ * cr_parser_parse:
+ *@a_this: the current instance of #CRParser.
+ *
+ *Parses the data that comes from the
+ *input previously associated to the current instance of
+ *#CRParser.
+ *
+ *Returns CR_OK upon successful completion, an error code otherwise.
+ */
+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;
+}
+
+/**
+ * cr_parser_set_tknzr:
+ * @a_this: the current instance of #CRParser;
+ * @a_tknzr: the new tokenizer.
+ *
+ * Returns CR_OK upon successful completion, an error code otherwise.
+ */
+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;
+}
+
+/**
+ * cr_parser_get_tknzr:
+ *@a_this: the current instance of #CRParser
+ *@a_tknzr: out parameter. The returned tokenizer
+ *
+ *Getter of the parser's underlying tokenizer
+ *
+ *Returns CR_OK upon successful 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;
+}
+
+/**
+ * cr_parser_get_parsing_location:
+ *@a_this: the current instance of #CRParser
+ *@a_loc: the parsing location to get.
+ *
+ *Gets the current parsing location.
+ *
+ *Returns CR_OK upon successful completion, an error code
+ *otherwise.
+ */
+enum CRStatus
+cr_parser_get_parsing_location (CRParser const *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) ;
+}
+
+/**
+ * cr_parser_parse_buf:
+ *@a_this: the current instance of #CRparser
+ *@a_buf: the input buffer
+ *@a_len: the length of the input buffer
+ *@a_enc: the encoding of the buffer
+ *
+ *Parses a stylesheet from a buffer
+ *
+ *Returns 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;
+}
+
+/**
+ * cr_parser_destroy:
+ *@a_this: the current instance of #CRParser to
+ *destroy.
+ *
+ *Destroys the current instance
+ *of #CRParser.
+ */
+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 */
+ }
+}