/**
*Parses an expresion as defined by the css2 spec
*and builds the expression as a list of terms.
*@param a_buf the buffer to parse.
*@return a pointer to the first term of the expression or
*NULL if parsing failed.
*/
CRTerm *
cr_term_parse_expression_from_buf (const guchar * a_buf,
enum CREncoding a_encoding)
{
CRTerm *result = NULL;
enum CRStatus status = CR_OK;
g_return_val_if_fail (a_buf, NULL);
CRParser *parser = cr_parser_new_from_buf (
(guchar*)a_buf,
strlen ((char *)a_buf),
a_encoding, FALSE);
g_return_val_if_fail (parser, NULL);
status = cr_parser_try_to_skip_spaces_and_comments (parser);
if (status != CR_OK) {
goto cleanup;
}
status = cr_parser_parse_expr (parser, &result);
if (status != CR_OK) {
if (result) {
cr_term_destroy (result);
result = NULL;
}
}
cleanup:
if (parser) {
cr_parser_destroy (parser);
parser = NULL;
}
return result;
}
/**
*Parses a text buffer that contains
*a css declaration.
*
*@param a_statement the parent css2 statement of this
*this declaration. Must be non NULL and of type
*RULESET_STMT (must be a ruleset).
*@param a_str the string that contains the statement.
*@param a_enc the encoding of a_str.
*@return the parsed declaration, or NULL in case of error.
*/
CRDeclaration *
cr_declaration_parse_from_buf (CRStatement * a_statement,
const guchar * a_str, enum CREncoding a_enc)
{
enum CRStatus status = CR_OK;
CRTerm *value = NULL;
CRString *property = NULL;
CRDeclaration *result = NULL;
gboolean important = FALSE;
g_return_val_if_fail (a_str, NULL);
if (a_statement)
g_return_val_if_fail (a_statement->type == RULESET_STMT,
NULL);
CRParser *parser = (CRParser *)
cr_parser_new_from_buf ((guchar*)a_str,
strlen ((char *)a_str), a_enc, FALSE);
g_return_val_if_fail (parser, NULL);
status = cr_parser_try_to_skip_spaces_and_comments (parser);
if (status != CR_OK)
goto cleanup;
status = cr_parser_parse_declaration (parser, &property,
&value, &important);
if (status != CR_OK || !property)
goto cleanup;
result = cr_declaration_new (a_statement, property, value);
if (result) {
property = NULL;
value = NULL;
result->important = important;
}
cleanup:
if (parser) {
cr_parser_destroy (parser);
parser = NULL;
}
if (property) {
cr_string_destroy (property);
property = NULL;
}
if (value) {
cr_term_destroy (value);
value = NULL;
}
return result;
}
/**
* cr_rgb_parse_from_buf:
*@a_str: a string that contains a color description
*@a_enc: the encoding of a_str
*
*Parses a text buffer that contains a rgb color
*
*Returns the parsed color, or NULL in case of error
*/
CRRgb *
cr_rgb_parse_from_buf (const guchar *a_str,
enum CREncoding a_enc)
{
enum CRStatus status = CR_OK ;
CRTerm *value = NULL ;
CRParser * parser = NULL;
CRRgb *result = NULL;
g_return_val_if_fail (a_str, NULL);
parser = cr_parser_new_from_buf ((guchar*)a_str, strlen (a_str),
a_enc, FALSE) ;
g_return_val_if_fail (parser, NULL);
status = cr_parser_try_to_skip_spaces_and_comments (parser) ;
if (status != CR_OK)
goto cleanup;
status = cr_parser_parse_term (parser, &value);
if (status != CR_OK)
goto cleanup;
result = cr_rgb_new ();
if (!result)
goto cleanup;
status = cr_rgb_set_from_term (result, value);
cleanup:
if (parser) {
cr_parser_destroy (parser);
parser = NULL;
}
if (value) {
cr_term_destroy(value);
value = NULL;
}
return result ;
}
/**
* cr_declaration_parse_list_from_buf:
*@a_str: the input buffer that contains the list of declaration to
*parse.
*@a_enc: the encoding of a_str
*
*Parses a ';' separated list of properties declaration.
*Returns the parsed list of declaration, NULL if parsing failed.
*/
CRDeclaration *
cr_declaration_parse_list_from_buf (const guchar * a_str,
enum CREncoding a_enc)
{
enum CRStatus status = CR_OK;
CRTerm *value = NULL;
CRString *property = NULL;
CRDeclaration *result = NULL,
*cur_decl = NULL;
CRParser *parser = NULL;
CRTknzr *tokenizer = NULL;
gboolean important = FALSE;
g_return_val_if_fail (a_str, NULL);
parser = cr_parser_new_from_buf ((guchar*)a_str, strlen (a_str), a_enc, FALSE);
g_return_val_if_fail (parser, NULL);
status = cr_parser_get_tknzr (parser, &tokenizer);
if (status != CR_OK || !tokenizer) {
if (status == CR_OK)
status = CR_ERROR;
goto cleanup;
}
status = cr_parser_try_to_skip_spaces_and_comments (parser);
if (status != CR_OK)
goto cleanup;
status = cr_parser_parse_declaration (parser, &property,
&value, &important);
if (status != CR_OK || !property) {
if (status != CR_OK)
status = CR_ERROR;
goto cleanup;
}
result = cr_declaration_new (NULL, property, value);
if (result) {
property = NULL;
value = NULL;
result->important = important;
}
/*now, go parse the other declarations */
for (;;) {
guint32 c = 0;
cr_parser_try_to_skip_spaces_and_comments (parser);
status = cr_tknzr_peek_char (tokenizer, &c);
if (status != CR_OK) {
if (status == CR_END_OF_INPUT_ERROR)
status = CR_OK;
goto cleanup;
}
if (c == ';') {
status = cr_tknzr_read_char (tokenizer, &c);
} else {
break;
}
important = FALSE;
cr_parser_try_to_skip_spaces_and_comments (parser);
status = cr_parser_parse_declaration (parser, &property,
&value, &important);
if (status != CR_OK || !property) {
if (status == CR_END_OF_INPUT_ERROR) {
status = CR_OK;
}
break;
}
cur_decl = cr_declaration_new (NULL, property, value);
if (cur_decl) {
cur_decl->important = important;
result = cr_declaration_append (result, cur_decl);
property = NULL;
value = NULL;
cur_decl = NULL;
} else {
break;
}
}
cleanup:
if (parser) {
cr_parser_destroy (parser);
parser = NULL;
}
if (property) {
cr_string_destroy (property);
property = NULL;
}
if (value) {
cr_term_destroy (value);
value = NULL;
}
if (status != CR_OK && result) {
cr_declaration_destroy (result);
result = NULL;
}
return result;
}
/**
*Parses a ';' separated list of properties declaration.
*@param a_str the input buffer that contains the list of declaration to
*parse.
*@param a_enc the encoding of a_str
*@return the parsed list of declaration, NULL if parsing failed.
*/
CRDeclaration *
cr_declaration_parse_list_from_buf (const guchar * a_str,
enum CREncoding a_enc)
{
enum CRStatus status = CR_OK;
CRTerm *value = NULL;
CRString *property = NULL;
CRDeclaration *result = NULL,
*cur_decl = NULL;
CRTknzr *tokenizer = NULL;
gboolean important = FALSE;
g_return_val_if_fail (a_str, NULL);
CRParser *parser = (CRParser *)cr_parser_new_from_buf
((guchar*)a_str, strlen ((char *)a_str), a_enc, FALSE);
g_return_val_if_fail (parser, NULL);
status = cr_parser_get_tknzr (parser, &tokenizer);
if (status != CR_OK || !tokenizer) {
if (status == CR_OK)
status = CR_ERROR;
goto cleanup;
}
status = cr_parser_try_to_skip_spaces_and_comments (parser);
if (status != CR_OK)
goto cleanup;
status = cr_parser_parse_declaration (parser, &property,
&value, &important);
if (status != CR_OK || !property) {
if (status != CR_OK)
status = CR_ERROR;
goto cleanup;
}
result = cr_declaration_new (NULL, property, value);
if (result) {
property = NULL;
value = NULL;
result->important = important;
}
/*now, go parse the other declarations */
for (;;) {
guint32 c = 0;
cr_parser_try_to_skip_spaces_and_comments (parser);
status = cr_tknzr_peek_char (tokenizer, &c);
if (status != CR_OK) {
if (status == CR_END_OF_INPUT_ERROR)
status = CR_OK;
goto cleanup;
}
if (c == ';') {
status = cr_tknzr_read_char (tokenizer, &c);
} else {
cr_tknzr_read_char (tokenizer, &c);
continue; // try to keep reading until we reach the end or a ;
}
important = FALSE;
cr_parser_try_to_skip_spaces_and_comments (parser);
status = cr_parser_parse_declaration (parser, &property,
&value, &important);
if (status != CR_OK || !property) {
if (status == CR_END_OF_INPUT_ERROR) {
status = CR_OK; // simply the end of input, do not delete what we got so far, just finish
break;
} else {
continue; // even if one declaration is broken, it's no reason to discard others (see http://www.w3.org/TR/CSS21/syndata.html#declaration)
}
}
cur_decl = cr_declaration_new (NULL, property, value);
if (cur_decl) {
cur_decl->important = important;
result = cr_declaration_append (result, cur_decl);
property = NULL;
value = NULL;
cur_decl = NULL;
} else {
break;
}
}
cleanup:
if (parser) {
cr_parser_destroy (parser);
parser = NULL;
}
if (property) {
cr_string_destroy (property);
property = NULL;
}
if (value) {
cr_term_destroy (value);
value = NULL;
}
if (status != CR_OK && result) {
cr_declaration_destroy (result);
result = NULL;
}
return result;
}
