diff options
Diffstat (limited to 'src/st/croco/cr-om-parser.c')
| -rw-r--r-- | src/st/croco/cr-om-parser.c | 1142 |
1 files changed, 1142 insertions, 0 deletions
diff --git a/src/st/croco/cr-om-parser.c b/src/st/croco/cr-om-parser.c new file mode 100644 index 0000000..90f7106 --- /dev/null +++ b/src/st/croco/cr-om-parser.c @@ -0,0 +1,1142 @@ +/* -*- Mode: C; indent-tabs-mode:nil; c-basic-offset: 8-*- */ + +/* + * This file is part of The Croco Library + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2.1 of the GNU Lesser General Public + * License as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + * USA + * + * Author: Dodji Seketeli + * See COPYRIGHTS file for copyright information. + */ + +#include <string.h> +#include "cr-utils.h" +#include "cr-om-parser.h" + +/** + *@CROMParser: + * + *The definition of the CSS Object Model Parser. + *This parser uses (and sits) the SAC api of libcroco defined + *in cr-parser.h and cr-doc-handler.h + */ + +struct _CROMParserPriv { + CRParser *parser; +}; + +#define PRIVATE(a_this) ((a_this)->priv) + +/* + *Forward declaration of a type defined later + *in this file. + */ +struct _ParsingContext; +typedef struct _ParsingContext ParsingContext; + +static ParsingContext *new_parsing_context (void); + +static void destroy_context (ParsingContext * a_ctxt); + +static void unrecoverable_error (CRDocHandler * a_this); + +static void error (CRDocHandler * a_this); + +static void property (CRDocHandler * a_this, + CRString * a_name, + CRTerm * a_expression, + gboolean a_important); + +static void end_selector (CRDocHandler * a_this, + CRSelector * a_selector_list); + +static void start_selector (CRDocHandler * a_this, + CRSelector * a_selector_list); + +static void start_font_face (CRDocHandler * a_this, + CRParsingLocation *a_location); + +static void end_font_face (CRDocHandler * a_this); + +static void end_document (CRDocHandler * a_this); + +static void start_document (CRDocHandler * a_this); + +static void charset (CRDocHandler * a_this, + CRString * a_charset, + CRParsingLocation *a_location); + +static void start_page (CRDocHandler * a_this, CRString * a_page, + CRString * a_pseudo_page, + CRParsingLocation *a_location); + +static void end_page (CRDocHandler * a_this, CRString * a_page, + CRString * a_pseudo_page); + +static void start_media (CRDocHandler * a_this, + GList * a_media_list, + CRParsingLocation *a_location); + +static void end_media (CRDocHandler * a_this, + GList * a_media_list); + +static void import_style (CRDocHandler * a_this, + GList * a_media_list, + CRString * a_uri, + CRString * a_uri_default_ns, + CRParsingLocation *a_location); + +struct _ParsingContext { + CRStyleSheet *stylesheet; + CRStatement *cur_stmt; + CRStatement *cur_media_stmt; +}; + +/******************************************** + *Private methods + ********************************************/ + +static ParsingContext * +new_parsing_context (void) +{ + ParsingContext *result = NULL; + + result = g_try_malloc (sizeof (ParsingContext)); + if (!result) { + cr_utils_trace_info ("Out of Memory"); + return NULL; + } + memset (result, 0, sizeof (ParsingContext)); + return result; +} + +static void +destroy_context (ParsingContext * a_ctxt) +{ + g_return_if_fail (a_ctxt); + + if (a_ctxt->stylesheet) { + cr_stylesheet_destroy (a_ctxt->stylesheet); + a_ctxt->stylesheet = NULL; + } + if (a_ctxt->cur_stmt) { + cr_statement_destroy (a_ctxt->cur_stmt); + a_ctxt->cur_stmt = NULL; + } + g_free (a_ctxt); +} + +static enum CRStatus +cr_om_parser_init_default_sac_handler (CROMParser * a_this) +{ + CRDocHandler *sac_handler = NULL; + gboolean created_handler = FALSE; + enum CRStatus status = CR_OK; + + g_return_val_if_fail (a_this && PRIVATE (a_this) + && PRIVATE (a_this)->parser, + CR_BAD_PARAM_ERROR); + + status = cr_parser_get_sac_handler (PRIVATE (a_this)->parser, + &sac_handler); + g_return_val_if_fail (status == CR_OK, status); + + if (!sac_handler) { + sac_handler = cr_doc_handler_new (); + created_handler = TRUE; + } + + /* + *initialize here the sac handler. + */ + sac_handler->start_document = start_document; + sac_handler->end_document = end_document; + sac_handler->start_selector = start_selector; + sac_handler->end_selector = end_selector; + sac_handler->property = property; + sac_handler->start_font_face = start_font_face; + sac_handler->end_font_face = end_font_face; + sac_handler->error = error; + sac_handler->unrecoverable_error = unrecoverable_error; + sac_handler->charset = charset; + sac_handler->start_page = start_page; + sac_handler->end_page = end_page; + sac_handler->start_media = start_media; + sac_handler->end_media = end_media; + sac_handler->import_style = import_style; + + if (created_handler) { + status = cr_parser_set_sac_handler (PRIVATE (a_this)->parser, + sac_handler); + cr_doc_handler_unref (sac_handler); + } + + return status; + +} + +static void +start_document (CRDocHandler * a_this) +{ + ParsingContext *ctxt = NULL; + CRStyleSheet *stylesheet = NULL; + + g_return_if_fail (a_this); + + ctxt = new_parsing_context (); + g_return_if_fail (ctxt); + + stylesheet = cr_stylesheet_new (NULL); + ctxt->stylesheet = stylesheet; + cr_doc_handler_set_ctxt (a_this, ctxt); +} + +static void +start_font_face (CRDocHandler * a_this, + CRParsingLocation *a_location) +{ + enum CRStatus status = CR_OK; + ParsingContext *ctxt = NULL; + ParsingContext **ctxtptr = NULL; + + g_return_if_fail (a_this); + + g_return_if_fail (a_this); + ctxtptr = &ctxt; + status = cr_doc_handler_get_ctxt (a_this, (gpointer *) ctxtptr); + g_return_if_fail (status == CR_OK && ctxt); + g_return_if_fail (ctxt->cur_stmt == NULL); + + ctxt->cur_stmt = + cr_statement_new_at_font_face_rule (ctxt->stylesheet, NULL); + + g_return_if_fail (ctxt->cur_stmt); +} + +static void +end_font_face (CRDocHandler * a_this) +{ + enum CRStatus status = CR_OK; + ParsingContext *ctxt = NULL; + ParsingContext **ctxtptr = NULL; + CRStatement *stmts = NULL; + + g_return_if_fail (a_this); + + g_return_if_fail (a_this); + ctxtptr = &ctxt; + status = cr_doc_handler_get_ctxt (a_this, (gpointer *) ctxtptr); + g_return_if_fail (status == CR_OK && ctxt); + g_return_if_fail + (ctxt->cur_stmt + && ctxt->cur_stmt->type == AT_FONT_FACE_RULE_STMT + && ctxt->stylesheet); + + stmts = cr_statement_append (ctxt->stylesheet->statements, + ctxt->cur_stmt); + if (!stmts) + goto error; + + ctxt->stylesheet->statements = stmts; + stmts = NULL; + ctxt->cur_stmt = NULL; + + return; + + error: + + if (ctxt->cur_stmt) { + cr_statement_destroy (ctxt->cur_stmt); + ctxt->cur_stmt = NULL; + } + + if (!stmts) { + cr_statement_destroy (stmts); + stmts = NULL; + } +} + +static void +end_document (CRDocHandler * a_this) +{ + enum CRStatus status = CR_OK; + ParsingContext *ctxt = NULL; + ParsingContext **ctxtptr = NULL; + + g_return_if_fail (a_this); + ctxtptr = &ctxt; + status = cr_doc_handler_get_ctxt (a_this, (gpointer *) ctxtptr); + g_return_if_fail (status == CR_OK && ctxt); + + if (!ctxt->stylesheet || ctxt->cur_stmt) + goto error; + + status = cr_doc_handler_set_result (a_this, ctxt->stylesheet); + g_return_if_fail (status == CR_OK); + + ctxt->stylesheet = NULL; + destroy_context (ctxt); + cr_doc_handler_set_ctxt (a_this, NULL); + + return; + + error: + if (ctxt) { + destroy_context (ctxt); + } +} + +static void +charset (CRDocHandler * a_this, CRString * a_charset, + CRParsingLocation *a_location) +{ + enum CRStatus status = CR_OK; + CRStatement *stmt = NULL, + *stmt2 = NULL; + CRString *charset = NULL; + + ParsingContext *ctxt = NULL; + ParsingContext **ctxtptr = NULL; + + g_return_if_fail (a_this); + ctxtptr = &ctxt; + status = cr_doc_handler_get_ctxt (a_this, (gpointer *) ctxtptr); + g_return_if_fail (status == CR_OK && ctxt); + g_return_if_fail (ctxt->stylesheet); + + charset = cr_string_dup (a_charset) ; + stmt = cr_statement_new_at_charset_rule (ctxt->stylesheet, charset); + g_return_if_fail (stmt); + stmt2 = cr_statement_append (ctxt->stylesheet->statements, stmt); + if (!stmt2) { + if (stmt) { + cr_statement_destroy (stmt); + stmt = NULL; + } + if (charset) { + cr_string_destroy (charset); + } + return; + } + ctxt->stylesheet->statements = stmt2; + stmt2 = NULL; +} + +static void +start_page (CRDocHandler * a_this, + CRString * a_page, + CRString * a_pseudo, + CRParsingLocation *a_location) +{ + enum CRStatus status = CR_OK; + ParsingContext *ctxt = NULL; + ParsingContext **ctxtptr = NULL; + + g_return_if_fail (a_this); + ctxtptr = &ctxt; + status = cr_doc_handler_get_ctxt (a_this, (gpointer *) ctxtptr); + g_return_if_fail (status == CR_OK && ctxt); + g_return_if_fail (ctxt->cur_stmt == NULL); + + ctxt->cur_stmt = cr_statement_new_at_page_rule + (ctxt->stylesheet, NULL, NULL, NULL); + if (a_page) { + ctxt->cur_stmt->kind.page_rule->name = + cr_string_dup (a_page) ; + + if (!ctxt->cur_stmt->kind.page_rule->name) { + goto error; + } + } + if (a_pseudo) { + ctxt->cur_stmt->kind.page_rule->pseudo = + cr_string_dup (a_pseudo) ; + if (!ctxt->cur_stmt->kind.page_rule->pseudo) { + goto error; + } + } + return; + + error: + if (ctxt->cur_stmt) { + cr_statement_destroy (ctxt->cur_stmt); + ctxt->cur_stmt = NULL; + } +} + +static void +end_page (CRDocHandler * a_this, + CRString * a_page, + CRString * a_pseudo_page) +{ + enum CRStatus status = CR_OK; + ParsingContext *ctxt = NULL; + ParsingContext **ctxtptr = NULL; + CRStatement *stmt = NULL; + + (void) a_page; + (void) a_pseudo_page; + + g_return_if_fail (a_this); + + ctxtptr = &ctxt; + status = cr_doc_handler_get_ctxt (a_this, (gpointer *) ctxtptr); + + g_return_if_fail (status == CR_OK && ctxt); + + g_return_if_fail (ctxt->cur_stmt + && ctxt->cur_stmt->type == AT_PAGE_RULE_STMT + && ctxt->stylesheet); + + stmt = cr_statement_append (ctxt->stylesheet->statements, + ctxt->cur_stmt); + + if (stmt) { + ctxt->stylesheet->statements = stmt; + stmt = NULL; + ctxt->cur_stmt = NULL; + } + + if (ctxt->cur_stmt) { + cr_statement_destroy (ctxt->cur_stmt); + ctxt->cur_stmt = NULL; + } + a_page = NULL; /*keep compiler happy */ + a_pseudo_page = NULL; /*keep compiler happy */ +} + +static void +start_media (CRDocHandler * a_this, + GList * a_media_list, + CRParsingLocation *a_location) +{ + enum CRStatus status = CR_OK; + ParsingContext *ctxt = NULL; + ParsingContext **ctxtptr = NULL; + GList *media_list = NULL; + + g_return_if_fail (a_this); + ctxtptr = &ctxt; + status = cr_doc_handler_get_ctxt (a_this, (gpointer *) ctxtptr); + g_return_if_fail (status == CR_OK && ctxt); + + g_return_if_fail (ctxt + && ctxt->cur_stmt == NULL + && ctxt->cur_media_stmt == NULL + && ctxt->stylesheet); + if (a_media_list) { + /*duplicate the media_list */ + media_list = cr_utils_dup_glist_of_cr_string + (a_media_list); + } + ctxt->cur_media_stmt = + cr_statement_new_at_media_rule + (ctxt->stylesheet, NULL, media_list); + +} + +static void +end_media (CRDocHandler * a_this, GList * a_media_list) +{ + enum CRStatus status = CR_OK; + ParsingContext *ctxt = NULL; + ParsingContext **ctxtptr = NULL; + CRStatement *stmts = NULL; + + (void) a_media_list; + + g_return_if_fail (a_this); + + ctxtptr = &ctxt; + status = cr_doc_handler_get_ctxt (a_this, (gpointer *) ctxtptr); + + g_return_if_fail (status == CR_OK && ctxt); + + g_return_if_fail (ctxt + && ctxt->cur_media_stmt + && ctxt->cur_media_stmt->type == AT_MEDIA_RULE_STMT + && ctxt->stylesheet); + + stmts = cr_statement_append (ctxt->stylesheet->statements, + ctxt->cur_media_stmt); + + if (!stmts) { + cr_statement_destroy (ctxt->cur_media_stmt); + ctxt->cur_media_stmt = NULL; + } + + ctxt->stylesheet->statements = stmts; + stmts = NULL; + + ctxt->cur_stmt = NULL ; + ctxt->cur_media_stmt = NULL ; + a_media_list = NULL; +} + +static void +import_style (CRDocHandler * a_this, + GList * a_media_list, + CRString * a_uri, + CRString * a_uri_default_ns, + CRParsingLocation *a_location) +{ + enum CRStatus status = CR_OK; + CRString *uri = NULL; + CRStatement *stmt = NULL, + *stmt2 = NULL; + ParsingContext *ctxt = NULL; + ParsingContext **ctxtptr = NULL; + GList *media_list = NULL ; + + (void) a_uri_default_ns; + + g_return_if_fail (a_this); + + ctxtptr = &ctxt; + status = cr_doc_handler_get_ctxt (a_this, (gpointer *) ctxtptr); + + g_return_if_fail (status == CR_OK && ctxt); + + g_return_if_fail (ctxt->stylesheet); + + uri = cr_string_dup (a_uri) ; + + if (a_media_list) + media_list = cr_utils_dup_glist_of_cr_string (a_media_list) ; + + stmt = cr_statement_new_at_import_rule + (ctxt->stylesheet, uri, media_list, NULL); + + if (!stmt) + goto error; + + if (ctxt->cur_stmt) { + stmt2 = cr_statement_append (ctxt->cur_stmt, stmt); + if (!stmt2) + goto error; + ctxt->cur_stmt = stmt2; + stmt2 = NULL; + stmt = NULL; + } else { + stmt2 = cr_statement_append (ctxt->stylesheet->statements, + stmt); + if (!stmt2) + goto error; + ctxt->stylesheet->statements = stmt2; + stmt2 = NULL; + stmt = NULL; + } + + return; + + error: + if (uri) { + cr_string_destroy (uri); + } + + if (stmt) { + cr_statement_destroy (stmt); + stmt = NULL; + } + a_uri_default_ns = NULL; /*keep compiler happy */ +} + +static void +start_selector (CRDocHandler * a_this, CRSelector * a_selector_list) +{ + enum CRStatus status = CR_OK ; + ParsingContext *ctxt = NULL; + ParsingContext **ctxtptr = NULL; + + g_return_if_fail (a_this); + ctxtptr = &ctxt; + status = cr_doc_handler_get_ctxt (a_this, (gpointer *) ctxtptr); + g_return_if_fail (status == CR_OK && ctxt); + if (ctxt->cur_stmt) { + /*hmm, this should be NULL so free it */ + cr_statement_destroy (ctxt->cur_stmt); + ctxt->cur_stmt = NULL; + } + + ctxt->cur_stmt = cr_statement_new_ruleset + (ctxt->stylesheet, a_selector_list, NULL, NULL); +} + +static void +end_selector (CRDocHandler * a_this, CRSelector * a_selector_list) +{ + enum CRStatus status = CR_OK; + ParsingContext *ctxt = NULL; + ParsingContext **ctxtptr = NULL; + + (void) a_selector_list; + + g_return_if_fail (a_this); + + ctxtptr = &ctxt; + status = cr_doc_handler_get_ctxt (a_this, (gpointer *) ctxtptr); + + g_return_if_fail (status == CR_OK && ctxt); + + g_return_if_fail (ctxt->cur_stmt && ctxt->stylesheet); + + if (ctxt->cur_stmt) { + CRStatement *stmts = NULL; + + if (ctxt->cur_media_stmt) { + CRAtMediaRule *media_rule = NULL; + + media_rule = ctxt->cur_media_stmt->kind.media_rule; + + stmts = cr_statement_append + (media_rule->rulesets, ctxt->cur_stmt); + + if (!stmts) { + cr_utils_trace_info + ("Could not append a new statement"); + cr_statement_destroy (media_rule->rulesets); + ctxt->cur_media_stmt-> + kind.media_rule->rulesets = NULL; + return; + } + media_rule->rulesets = stmts; + ctxt->cur_stmt = NULL; + } else { + stmts = cr_statement_append + (ctxt->stylesheet->statements, + ctxt->cur_stmt); + if (!stmts) { + cr_utils_trace_info + ("Could not append a new statement"); + cr_statement_destroy (ctxt->cur_stmt); + ctxt->cur_stmt = NULL; + return; + } + ctxt->stylesheet->statements = stmts; + ctxt->cur_stmt = NULL; + } + + } + + a_selector_list = NULL; /*keep compiler happy */ +} + +static void +property (CRDocHandler * a_this, + CRString * a_name, + CRTerm * a_expression, + gboolean a_important) +{ + enum CRStatus status = CR_OK; + ParsingContext *ctxt = NULL; + ParsingContext **ctxtptr = NULL; + CRDeclaration *decl = NULL, + *decl2 = NULL; + CRString *str = NULL; + + g_return_if_fail (a_this); + ctxtptr = &ctxt; + status = cr_doc_handler_get_ctxt (a_this, (gpointer *) ctxtptr); + g_return_if_fail (status == CR_OK && ctxt); + + /* + *make sure a current ruleset statement has been allocated + *already. + */ + g_return_if_fail + (ctxt->cur_stmt + && + (ctxt->cur_stmt->type == RULESET_STMT + || ctxt->cur_stmt->type == AT_FONT_FACE_RULE_STMT + || ctxt->cur_stmt->type == AT_PAGE_RULE_STMT)); + + if (a_name) { + str = cr_string_dup (a_name); + g_return_if_fail (str); + } + + /*instantiates a new declaration */ + decl = cr_declaration_new (ctxt->cur_stmt, str, a_expression); + g_return_if_fail (decl); + str = NULL; + decl->important = a_important; + /* + *add the new declaration to the current statement + *being build. + */ + switch (ctxt->cur_stmt->type) { + case RULESET_STMT: + decl2 = cr_declaration_append + (ctxt->cur_stmt->kind.ruleset->decl_list, decl); + if (!decl2) { + cr_declaration_destroy (decl); + cr_utils_trace_info + ("Could not append decl to ruleset"); + goto error; + } + ctxt->cur_stmt->kind.ruleset->decl_list = decl2; + decl = NULL; + decl2 = NULL; + break; + + case AT_FONT_FACE_RULE_STMT: + decl2 = cr_declaration_append + (ctxt->cur_stmt->kind.font_face_rule->decl_list, + decl); + if (!decl2) { + cr_declaration_destroy (decl); + cr_utils_trace_info + ("Could not append decl to ruleset"); + goto error; + } + ctxt->cur_stmt->kind.font_face_rule->decl_list = decl2; + decl = NULL; + decl2 = NULL; + break; + case AT_PAGE_RULE_STMT: + decl2 = cr_declaration_append + (ctxt->cur_stmt->kind.page_rule->decl_list, decl); + if (!decl2) { + cr_declaration_destroy (decl); + cr_utils_trace_info + ("Could not append decl to ruleset"); + goto error; + } + ctxt->cur_stmt->kind.page_rule->decl_list = decl2; + decl = NULL; + decl2 = NULL; + break; + + default: + goto error; + break; + } + + return; + + error: + if (str) { + g_free (str); + str = NULL; + } + + if (decl) { + cr_declaration_destroy (decl); + decl = NULL; + } +} + +static void +error (CRDocHandler * a_this) +{ + enum CRStatus status = CR_OK; + ParsingContext *ctxt = NULL; + ParsingContext **ctxtptr = NULL; + + g_return_if_fail (a_this); + ctxtptr = &ctxt; + status = cr_doc_handler_get_ctxt (a_this, (gpointer *) ctxtptr); + g_return_if_fail (status == CR_OK && ctxt); + + if (ctxt->cur_stmt) { + cr_statement_destroy (ctxt->cur_stmt); + ctxt->cur_stmt = NULL; + } +} + +static void +unrecoverable_error (CRDocHandler * a_this) +{ + enum CRStatus status = CR_OK; + ParsingContext *ctxt = NULL; + ParsingContext **ctxtptr = NULL; + + ctxtptr = &ctxt; + status = cr_doc_handler_get_ctxt (a_this, (gpointer *) ctxtptr); + g_return_if_fail (status == CR_OK); + + if (ctxt) { + if (ctxt->stylesheet) { + status = cr_doc_handler_set_result + (a_this, ctxt->stylesheet); + g_return_if_fail (status == CR_OK); + } + g_free (ctxt); + cr_doc_handler_set_ctxt (a_this, NULL); + } +} + +/******************************************** + *Public methods + ********************************************/ + +/** + * cr_om_parser_new: + *@a_input: the input stream. + * + *Constructor of the CROMParser. + *Returns the newly built instance of #CROMParser. + */ +CROMParser * +cr_om_parser_new (CRInput * a_input) +{ + CROMParser *result = NULL; + enum CRStatus status = CR_OK; + + result = g_try_malloc (sizeof (CROMParser)); + + if (!result) { + cr_utils_trace_info ("Out of memory"); + return NULL; + } + + memset (result, 0, sizeof (CROMParser)); + PRIVATE (result) = g_try_malloc (sizeof (CROMParserPriv)); + + if (!PRIVATE (result)) { + cr_utils_trace_info ("Out of memory"); + goto error; + } + + memset (PRIVATE (result), 0, sizeof (CROMParserPriv)); + + PRIVATE (result)->parser = cr_parser_new_from_input (a_input); + + if (!PRIVATE (result)->parser) { + cr_utils_trace_info ("parsing instantiation failed"); + goto error; + } + + status = cr_om_parser_init_default_sac_handler (result); + + if (status != CR_OK) { + goto error; + } + + return result; + + error: + + if (result) { + cr_om_parser_destroy (result); + } + + return NULL; +} + +/** + * cr_om_parser_parse_buf: + *@a_this: the current instance of #CROMParser. + *@a_buf: the in memory buffer to parse. + *@a_len: the length of the in memory buffer in number of bytes. + *@a_enc: the encoding of the in memory buffer. + *@a_result: out parameter the resulting style sheet + * + *Parses the content of an in memory buffer. + * + *Returns CR_OK upon successful completion, an error code otherwise. + */ +enum CRStatus +cr_om_parser_parse_buf (CROMParser * a_this, + const guchar * a_buf, + gulong a_len, + enum CREncoding a_enc, CRStyleSheet ** a_result) +{ + + enum CRStatus status = CR_OK; + + g_return_val_if_fail (a_this && a_result, CR_BAD_PARAM_ERROR); + + if (!PRIVATE (a_this)->parser) { + PRIVATE (a_this)->parser = cr_parser_new (NULL); + } + + status = cr_parser_parse_buf (PRIVATE (a_this)->parser, + a_buf, a_len, a_enc); + + if (status == CR_OK) { + CRStyleSheet *result = NULL; + CRStyleSheet **resultptr = NULL; + CRDocHandler *sac_handler = NULL; + + cr_parser_get_sac_handler (PRIVATE (a_this)->parser, + &sac_handler); + g_return_val_if_fail (sac_handler, CR_ERROR); + resultptr = &result; + status = cr_doc_handler_get_result (sac_handler, + (gpointer *) resultptr); + g_return_val_if_fail (status == CR_OK, status); + + if (result) + *a_result = result; + } + + return status; +} + +/** + * cr_om_parser_simply_parse_buf: + *@a_buf: the css2 in memory buffer. + *@a_len: the length of the in memory buffer. + *@a_enc: the encoding of the in memory buffer. + *@a_result: out parameter. The resulting css2 style sheet. + * + *The simpler way to parse an in memory css2 buffer. + * + *Returns CR_OK upon successful completion, an error code otherwise. + */ +enum CRStatus +cr_om_parser_simply_parse_buf (const guchar * a_buf, + gulong a_len, + enum CREncoding a_enc, + CRStyleSheet ** a_result) +{ + CROMParser *parser = NULL; + enum CRStatus status = CR_OK; + + parser = cr_om_parser_new (NULL); + if (!parser) { + cr_utils_trace_info ("Could not create om parser"); + cr_utils_trace_info ("System possibly out of memory"); + return CR_ERROR; + } + + status = cr_om_parser_parse_buf (parser, a_buf, a_len, + a_enc, a_result); + + if (parser) { + cr_om_parser_destroy (parser); + parser = NULL; + } + + return status; +} + +/** + * cr_om_parser_parse_file: + *@a_this: the current instance of the cssom parser. + *@a_file_uri: the uri of the file. + *(only local file paths are supported so far) + *@a_enc: the encoding of the file. + *@a_result: out parameter. A pointer + *the build css object model. + * + *Parses a css2 stylesheet contained + *in a file. + * + * Returns CR_OK upon successful completion, an error code otherwise. + */ +enum CRStatus +cr_om_parser_parse_file (CROMParser * a_this, + const guchar * a_file_uri, + enum CREncoding a_enc, CRStyleSheet ** a_result) +{ + enum CRStatus status = CR_OK; + + g_return_val_if_fail (a_this && a_file_uri && a_result, + CR_BAD_PARAM_ERROR); + + if (!PRIVATE (a_this)->parser) { + PRIVATE (a_this)->parser = cr_parser_new_from_file + (a_file_uri, a_enc); + } + + status = cr_parser_parse_file (PRIVATE (a_this)->parser, + a_file_uri, a_enc); + + if (status == CR_OK) { + CRStyleSheet *result = NULL; + CRStyleSheet **resultptr = NULL; + CRDocHandler *sac_handler = NULL; + + cr_parser_get_sac_handler (PRIVATE (a_this)->parser, + &sac_handler); + g_return_val_if_fail (sac_handler, CR_ERROR); + resultptr = &result; + status = cr_doc_handler_get_result + (sac_handler, (gpointer *) resultptr); + g_return_val_if_fail (status == CR_OK, status); + if (result) + *a_result = result; + } + + return status; +} + +/** + * cr_om_parser_simply_parse_file: + *@a_file_path: the css2 local file path. + *@a_enc: the file encoding. + *@a_result: out parameter. The returned css stylesheet. + *Must be freed by the caller using cr_stylesheet_destroy. + * + *The simpler method to parse a css2 file. + * + *Returns CR_OK upon successful completion, an error code otherwise. + *Note that this method uses cr_om_parser_parse_file() so both methods + *have the same return values. + */ +enum CRStatus +cr_om_parser_simply_parse_file (const guchar * a_file_path, + enum CREncoding a_enc, + CRStyleSheet ** a_result) +{ + CROMParser *parser = NULL; + enum CRStatus status = CR_OK; + + parser = cr_om_parser_new (NULL); + if (!parser) { + cr_utils_trace_info ("Could not allocate om parser"); + cr_utils_trace_info ("System may be out of memory"); + return CR_ERROR; + } + + status = cr_om_parser_parse_file (parser, a_file_path, + a_enc, a_result); + if (parser) { + cr_om_parser_destroy (parser); + parser = NULL; + } + + return status; +} + +/** + * cr_om_parser_parse_paths_to_cascade: + *@a_this: the current instance of #CROMParser + *@a_author_path: the path to the author stylesheet + *@a_user_path: the path to the user stylesheet + *@a_ua_path: the path to the User Agent stylesheet + *@a_encoding: the encoding of the sheets. + *@a_result: out parameter. The resulting cascade if the parsing + *was okay + * + *Parses three sheets located by their paths and build a cascade + * + *Returns CR_OK upon successful completion, an error code otherwise + */ +enum CRStatus +cr_om_parser_parse_paths_to_cascade (CROMParser * a_this, + const guchar * a_author_path, + const guchar * a_user_path, + const guchar * a_ua_path, + enum CREncoding a_encoding, + CRCascade ** a_result) +{ + enum CRStatus status = CR_OK; + + /*0->author sheet, 1->user sheet, 2->UA sheet */ + CRStyleSheet *sheets[3]; + guchar *paths[3]; + CRCascade *result = NULL; + gint i = 0; + + g_return_val_if_fail (a_this, CR_BAD_PARAM_ERROR); + + memset (sheets, 0, sizeof (CRStyleSheet*) * 3); + paths[0] = (guchar *) a_author_path; + paths[1] = (guchar *) a_user_path; + paths[2] = (guchar *) a_ua_path; + + for (i = 0; i < 3; i++) { + status = cr_om_parser_parse_file (a_this, paths[i], + a_encoding, &sheets[i]); + if (status != CR_OK) { + if (sheets[i]) { + cr_stylesheet_unref (sheets[i]); + sheets[i] = NULL; + } + continue; + } + } + result = cr_cascade_new (sheets[0], sheets[1], sheets[2]); + if (!result) { + for (i = 0; i < 3; i++) { + cr_stylesheet_unref (sheets[i]); + sheets[i] = 0; + } + return CR_ERROR; + } + *a_result = result; + return CR_OK; +} + +/** + * cr_om_parser_simply_parse_paths_to_cascade: + *@a_author_path: the path to the author stylesheet + *@a_user_path: the path to the user stylesheet + *@a_ua_path: the path to the User Agent stylesheet + *@a_encoding: the encoding of the sheets. + *@a_result: out parameter. The resulting cascade if the parsing + *was okay + * + *Parses three sheets located by their paths and build a cascade + * + *Returns CR_OK upon successful completion, an error code otherwise + */ +enum CRStatus +cr_om_parser_simply_parse_paths_to_cascade (const guchar * a_author_path, + const guchar * a_user_path, + const guchar * a_ua_path, + enum CREncoding a_encoding, + CRCascade ** a_result) +{ + enum CRStatus status = CR_OK; + CROMParser *parser = NULL; + + parser = cr_om_parser_new (NULL); + if (!parser) { + cr_utils_trace_info ("could not allocated om parser"); + cr_utils_trace_info ("System may be out of memory"); + return CR_ERROR; + } + status = cr_om_parser_parse_paths_to_cascade (parser, + a_author_path, + a_user_path, + a_ua_path, + a_encoding, a_result); + if (parser) { + cr_om_parser_destroy (parser); + parser = NULL; + } + return status; +} + +/** + * cr_om_parser_destroy: + *@a_this: the current instance of #CROMParser. + * + *Destructor of the #CROMParser. + */ +void +cr_om_parser_destroy (CROMParser * a_this) +{ + g_return_if_fail (a_this && PRIVATE (a_this)); + + if (PRIVATE (a_this)->parser) { + cr_parser_destroy (PRIVATE (a_this)->parser); + PRIVATE (a_this)->parser = NULL; + } + + if (PRIVATE (a_this)) { + g_free (PRIVATE (a_this)); + PRIVATE (a_this) = NULL; + } + + if (a_this) { + g_free (a_this); + a_this = NULL; + } +} |