1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 2011 Benjamin Otte <otte@gnome.org>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
20 #include "gtkcssparserprivate.h"
22 #include "gtkcssnumbervalueprivate.h"
23 #include "gtkwin32themeprivate.h"
28 /* just for the errors, yay! */
29 #include "gtkcssprovider.h"
31 #define NEWLINE_CHARS "\r\n"
32 #define WHITESPACE_CHARS "\f \t"
33 #define NMSTART "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
34 #define NMCHAR NMSTART "01234567890-_"
35 #define URLCHAR NMCHAR "!#$%&*~"
37 #define GTK_IS_CSS_PARSER(parser) ((parser) != NULL)
43 GtkCssParserErrorFunc error_func;
46 const char *line_start;
51 _gtk_css_parser_new (const char *data,
53 GtkCssParserErrorFunc error_func,
58 g_return_val_if_fail (data != NULL, NULL);
59 g_return_val_if_fail (file == NULL || G_IS_FILE (file), NULL);
61 parser = g_slice_new0 (GtkCssParser);
65 parser->file = g_object_ref (file);
66 parser->error_func = error_func;
67 parser->user_data = user_data;
69 parser->line_start = data;
76 _gtk_css_parser_free (GtkCssParser *parser)
78 g_return_if_fail (GTK_IS_CSS_PARSER (parser));
81 g_object_unref (parser->file);
83 g_slice_free (GtkCssParser, parser);
87 _gtk_css_parser_is_eof (GtkCssParser *parser)
89 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), TRUE);
91 return *parser->data == 0;
95 _gtk_css_parser_begins_with (GtkCssParser *parser,
98 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), TRUE);
100 return *parser->data == c;
104 _gtk_css_parser_has_prefix (GtkCssParser *parser,
107 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), FALSE);
109 return g_ascii_strncasecmp (parser->data, prefix, strlen (prefix)) == 0;
113 _gtk_css_parser_get_line (GtkCssParser *parser)
115 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), 1);
121 _gtk_css_parser_get_position (GtkCssParser *parser)
123 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), 1);
125 return parser->data - parser->line_start;
129 _gtk_css_parser_take_error (GtkCssParser *parser,
132 parser->error_func (parser, error, parser->user_data);
134 g_error_free (error);
138 _gtk_css_parser_error (GtkCssParser *parser,
146 va_start (args, format);
147 error = g_error_new_valist (GTK_CSS_PROVIDER_ERROR,
148 GTK_CSS_PROVIDER_ERROR_SYNTAX,
152 _gtk_css_parser_take_error (parser, error);
156 _gtk_css_parser_error_full (GtkCssParser *parser,
157 GtkCssProviderError code,
165 va_start (args, format);
166 error = g_error_new_valist (GTK_CSS_PROVIDER_ERROR,
170 _gtk_css_parser_take_error (parser, error);
173 gtk_css_parser_new_line (GtkCssParser *parser)
175 gboolean result = FALSE;
177 if (*parser->data == '\r')
182 if (*parser->data == '\n')
191 parser->line_start = parser->data;
198 gtk_css_parser_skip_comment (GtkCssParser *parser)
200 if (parser->data[0] != '/' ||
201 parser->data[1] != '*')
206 while (*parser->data)
208 gsize len = strcspn (parser->data, NEWLINE_CHARS "/");
212 if (gtk_css_parser_new_line (parser))
217 if (parser->data[-2] == '*')
219 if (parser->data[0] == '*')
220 _gtk_css_parser_error (parser, "'/*' in comment block");
223 /* FIXME: position */
224 _gtk_css_parser_error (parser, "Unterminated comment");
229 _gtk_css_parser_skip_whitespace (GtkCssParser *parser)
233 while (*parser->data)
235 if (gtk_css_parser_new_line (parser))
238 len = strspn (parser->data, WHITESPACE_CHARS);
245 if (!gtk_css_parser_skip_comment (parser))
251 _gtk_css_parser_try (GtkCssParser *parser,
253 gboolean skip_whitespace)
255 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), FALSE);
256 g_return_val_if_fail (string != NULL, FALSE);
258 if (g_ascii_strncasecmp (parser->data, string, strlen (string)) != 0)
261 parser->data += strlen (string);
264 _gtk_css_parser_skip_whitespace (parser);
280 _gtk_css_parser_unescape (GtkCssParser *parser,
286 g_assert (*parser->data == '\\');
290 for (i = 0; i < 6; i++)
292 if (!g_ascii_isxdigit (parser->data[i]))
295 result = (result << 4) + get_xdigit (parser->data[i]);
300 g_string_append_unichar (str, result);
303 /* NB: gtk_css_parser_new_line() forward data pointer itself */
304 if (!gtk_css_parser_new_line (parser) &&
306 strchr (WHITESPACE_CHARS, *parser->data))
311 if (gtk_css_parser_new_line (parser))
314 g_string_append_c (str, *parser->data);
321 _gtk_css_parser_read_char (GtkCssParser *parser,
323 const char * allowed)
325 if (*parser->data == 0)
328 if (strchr (allowed, *parser->data))
330 g_string_append_c (str, *parser->data);
334 if (*parser->data >= 127)
336 gsize len = g_utf8_skip[(guint) *(guchar *) parser->data];
338 g_string_append_len (str, parser->data, len);
342 if (*parser->data == '\\')
344 _gtk_css_parser_unescape (parser, str);
352 _gtk_css_parser_try_name (GtkCssParser *parser,
353 gboolean skip_whitespace)
357 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), NULL);
359 name = g_string_new (NULL);
361 while (_gtk_css_parser_read_char (parser, name, NMCHAR))
365 _gtk_css_parser_skip_whitespace (parser);
367 return g_string_free (name, FALSE);
371 _gtk_css_parser_try_ident (GtkCssParser *parser,
372 gboolean skip_whitespace)
377 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), NULL);
379 start = parser->data;
381 ident = g_string_new (NULL);
383 if (*parser->data == '-')
385 g_string_append_c (ident, '-');
389 if (!_gtk_css_parser_read_char (parser, ident, NMSTART))
391 parser->data = start;
392 g_string_free (ident, TRUE);
396 while (_gtk_css_parser_read_char (parser, ident, NMCHAR))
400 _gtk_css_parser_skip_whitespace (parser);
402 return g_string_free (ident, FALSE);
406 _gtk_css_parser_is_string (GtkCssParser *parser)
408 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), FALSE);
410 return *parser->data == '"' || *parser->data == '\'';
414 _gtk_css_parser_read_string (GtkCssParser *parser)
419 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), NULL);
421 quote = *parser->data;
423 if (quote != '"' && quote != '\'')
425 _gtk_css_parser_error (parser, "Expected a string.");
430 str = g_string_new (NULL);
434 gsize len = strcspn (parser->data, "\\'\"\n\r\f");
436 g_string_append_len (str, parser->data, len);
440 switch (*parser->data)
443 _gtk_css_parser_unescape (parser, str);
447 if (*parser->data == quote)
450 _gtk_css_parser_skip_whitespace (parser);
451 return g_string_free (str, FALSE);
454 g_string_append_c (str, *parser->data);
458 /* FIXME: position */
459 _gtk_css_parser_error (parser, "Missing end quote in string.");
460 g_string_free (str, TRUE);
463 _gtk_css_parser_error (parser,
464 "Invalid character in string. Must be escaped.");
465 g_string_free (str, TRUE);
470 g_assert_not_reached ();
475 _gtk_css_parser_try_int (GtkCssParser *parser,
481 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), FALSE);
482 g_return_val_if_fail (value != NULL, FALSE);
484 /* strtoll parses a plus, but we are not allowed to */
485 if (*parser->data == '+')
489 result = g_ascii_strtoll (parser->data, &end, 10);
492 if (result > G_MAXINT || result < G_MININT)
494 if (parser->data == end)
500 _gtk_css_parser_skip_whitespace (parser);
506 _gtk_css_parser_try_uint (GtkCssParser *parser,
512 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), FALSE);
513 g_return_val_if_fail (value != NULL, FALSE);
516 result = g_ascii_strtoull (parser->data, &end, 10);
519 if (result > G_MAXUINT)
521 if (parser->data == end)
527 _gtk_css_parser_skip_whitespace (parser);
533 _gtk_css_parser_try_double (GtkCssParser *parser,
539 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), FALSE);
540 g_return_val_if_fail (value != NULL, FALSE);
543 result = g_ascii_strtod (parser->data, &end);
546 if (parser->data == end)
552 _gtk_css_parser_skip_whitespace (parser);
558 _gtk_css_parser_has_number (GtkCssParser *parser)
561 return strchr ("+-0123456789.", parser->data[0]) != NULL;
565 _gtk_css_number_value_parse (GtkCssParser *parser,
566 GtkCssNumberParseFlags flags)
568 static const struct {
571 GtkCssNumberParseFlags required_flags;
573 { "px", GTK_CSS_PX, GTK_CSS_PARSE_LENGTH },
574 { "pt", GTK_CSS_PT, GTK_CSS_PARSE_LENGTH },
575 { "em", GTK_CSS_EM, GTK_CSS_PARSE_LENGTH },
576 { "ex", GTK_CSS_EX, GTK_CSS_PARSE_LENGTH },
577 { "pc", GTK_CSS_PC, GTK_CSS_PARSE_LENGTH },
578 { "in", GTK_CSS_IN, GTK_CSS_PARSE_LENGTH },
579 { "cm", GTK_CSS_CM, GTK_CSS_PARSE_LENGTH },
580 { "mm", GTK_CSS_MM, GTK_CSS_PARSE_LENGTH },
581 { "rad", GTK_CSS_RAD, GTK_CSS_PARSE_ANGLE },
582 { "deg", GTK_CSS_DEG, GTK_CSS_PARSE_ANGLE },
583 { "grad", GTK_CSS_GRAD, GTK_CSS_PARSE_ANGLE },
584 { "turn", GTK_CSS_TURN, GTK_CSS_PARSE_ANGLE },
585 { "s", GTK_CSS_S, GTK_CSS_PARSE_TIME },
586 { "ms", GTK_CSS_MS, GTK_CSS_PARSE_TIME }
588 char *end, *unit_name;
592 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), NULL);
595 value = g_ascii_strtod (parser->data, &end);
598 _gtk_css_parser_error (parser, "not a number: %s", g_strerror (errno));
601 if (parser->data == end)
603 _gtk_css_parser_error (parser, "not a number");
609 if (flags & GTK_CSS_POSITIVE_ONLY &&
612 _gtk_css_parser_error (parser, "negative values are not allowed.");
616 unit_name = _gtk_css_parser_try_ident (parser, FALSE);
622 for (i = 0; i < G_N_ELEMENTS (units); i++)
624 if (flags & units[i].required_flags &&
625 g_ascii_strcasecmp (unit_name, units[i].name) == 0)
631 if (i >= G_N_ELEMENTS (units))
633 _gtk_css_parser_error (parser, "`%s' is not a valid unit.", unit_name);
637 unit = units[i].unit;
641 if ((flags & GTK_CSS_PARSE_PERCENT) &&
642 _gtk_css_parser_try (parser, "%", FALSE))
644 unit = GTK_CSS_PERCENT;
646 else if (value == 0.0)
648 if (flags & GTK_CSS_PARSE_NUMBER)
649 unit = GTK_CSS_NUMBER;
650 else if (flags & GTK_CSS_PARSE_LENGTH)
652 else if (flags & GTK_CSS_PARSE_ANGLE)
654 else if (flags & GTK_CSS_PARSE_TIME)
657 unit = GTK_CSS_PERCENT;
659 else if (flags & GTK_CSS_NUMBER_AS_PIXELS)
661 _gtk_css_parser_error_full (parser,
662 GTK_CSS_PROVIDER_ERROR_DEPRECATED,
663 "Not using units is deprecated. Assuming 'px'.");
666 else if (flags & GTK_CSS_PARSE_NUMBER)
668 unit = GTK_CSS_NUMBER;
672 _gtk_css_parser_error (parser, "Unit is missing.");
677 _gtk_css_parser_skip_whitespace (parser);
679 return _gtk_css_number_value_new (value, unit);
682 /* XXX: we should introduce GtkCssLenght that deals with
683 * different kind of units */
685 _gtk_css_parser_try_length (GtkCssParser *parser,
688 if (!_gtk_css_parser_try_int (parser, value))
691 /* FIXME: _try_uint skips spaces while the
694 _gtk_css_parser_try (parser, "px", TRUE);
700 _gtk_css_parser_try_enum (GtkCssParser *parser,
704 GEnumClass *enum_class;
709 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), FALSE);
710 g_return_val_if_fail (value != NULL, FALSE);
714 enum_class = g_type_class_ref (enum_type);
716 start = parser->data;
718 str = _gtk_css_parser_try_ident (parser, TRUE);
722 if (enum_class->n_values)
724 GEnumValue *enum_value;
726 for (enum_value = enum_class->values; enum_value->value_name; enum_value++)
728 if (enum_value->value_nick &&
729 g_ascii_strcasecmp (str, enum_value->value_nick) == 0)
731 *value = enum_value->value;
739 g_type_class_unref (enum_class);
742 parser->data = start;
748 _gtk_css_parser_try_hash_color (GtkCssParser *parser,
751 if (parser->data[0] == '#' &&
752 g_ascii_isxdigit (parser->data[1]) &&
753 g_ascii_isxdigit (parser->data[2]) &&
754 g_ascii_isxdigit (parser->data[3]))
756 if (g_ascii_isxdigit (parser->data[4]) &&
757 g_ascii_isxdigit (parser->data[5]) &&
758 g_ascii_isxdigit (parser->data[6]))
760 rgba->red = ((get_xdigit (parser->data[1]) << 4) + get_xdigit (parser->data[2])) / 255.0;
761 rgba->green = ((get_xdigit (parser->data[3]) << 4) + get_xdigit (parser->data[4])) / 255.0;
762 rgba->blue = ((get_xdigit (parser->data[5]) << 4) + get_xdigit (parser->data[6])) / 255.0;
768 rgba->red = get_xdigit (parser->data[1]) / 15.0;
769 rgba->green = get_xdigit (parser->data[2]) / 15.0;
770 rgba->blue = get_xdigit (parser->data[3]) / 15.0;
775 _gtk_css_parser_skip_whitespace (parser);
784 _gtk_css_parser_read_url (GtkCssParser *parser,
791 if (_gtk_css_parser_try (parser, "url", FALSE))
793 if (!_gtk_css_parser_try (parser, "(", TRUE))
795 _gtk_css_parser_skip_whitespace (parser);
796 if (_gtk_css_parser_try (parser, "(", TRUE))
798 _gtk_css_parser_error_full (parser,
799 GTK_CSS_PROVIDER_ERROR_DEPRECATED,
800 "Whitespace between 'url' and '(' is deprecated");
804 _gtk_css_parser_error (parser, "Expected '(' after 'url'");
809 path = _gtk_css_parser_read_string (parser);
813 if (!_gtk_css_parser_try (parser, ")", TRUE))
815 _gtk_css_parser_error (parser, "No closing ')' found for 'url'");
820 scheme = g_uri_parse_scheme (path);
823 file = g_file_new_for_uri (path);
831 path = _gtk_css_parser_try_name (parser, TRUE);
834 _gtk_css_parser_error (parser, "Not a valid url");
839 file = g_file_resolve_relative_path (base, path);
846 _gtk_css_parser_resync_internal (GtkCssParser *parser,
847 gboolean sync_at_semicolon,
848 gboolean read_sync_token,
854 len = strcspn (parser->data, "\\\"'/()[]{};" NEWLINE_CHARS);
857 if (gtk_css_parser_new_line (parser))
860 if (_gtk_css_parser_is_string (parser))
862 /* Hrm, this emits errors, and i suspect it shouldn't... */
863 char *free_me = _gtk_css_parser_read_string (parser);
868 if (gtk_css_parser_skip_comment (parser))
871 switch (*parser->data)
875 GString *ignore = g_string_new (NULL);
876 _gtk_css_parser_unescape (parser, ignore);
877 g_string_free (ignore, TRUE);
881 if (sync_at_semicolon && !read_sync_token)
884 if (sync_at_semicolon)
886 _gtk_css_parser_skip_whitespace (parser);
892 _gtk_css_parser_resync (parser, FALSE, ')');
898 _gtk_css_parser_resync (parser, FALSE, ']');
904 _gtk_css_parser_resync (parser, FALSE, '}');
907 if (sync_at_semicolon || !terminator)
909 _gtk_css_parser_skip_whitespace (parser);
916 if (terminator == *parser->data)
918 _gtk_css_parser_skip_whitespace (parser);
930 } while (*parser->data);
934 _gtk_css_parser_read_value (GtkCssParser *parser)
939 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), NULL);
941 start = parser->data;
943 /* This needs to be done better */
944 _gtk_css_parser_resync_internal (parser, TRUE, FALSE, '}');
946 result = g_strndup (start, parser->data - start);
958 _gtk_css_parser_error (parser, "Expected a property value");
964 _gtk_css_parser_resync (GtkCssParser *parser,
965 gboolean sync_at_semicolon,
968 g_return_if_fail (GTK_IS_CSS_PARSER (parser));
970 _gtk_css_parser_resync_internal (parser, sync_at_semicolon, TRUE, terminator);