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, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
22 #include "gtkcssparserprivate.h"
27 /* just for the errors, yay! */
28 #include "gtkcssprovider.h"
30 #define NEWLINE_CHARS "\r\n"
31 #define WHITESPACE_CHARS "\f \t"
32 #define NMSTART "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
33 #define NMCHAR NMSTART "01234567890-_"
34 #define URLCHAR NMCHAR "!#$%&*~"
36 #define GTK_IS_CSS_PARSER(parser) ((parser) != NULL)
41 GtkCssParserErrorFunc error_func;
44 const char *line_start;
49 _gtk_css_parser_new (const char *data,
50 GtkCssParserErrorFunc error_func,
55 g_return_val_if_fail (data != NULL, NULL);
57 parser = g_slice_new0 (GtkCssParser);
60 parser->error_func = error_func;
61 parser->user_data = user_data;
63 parser->line_start = data;
70 _gtk_css_parser_free (GtkCssParser *parser)
72 g_return_if_fail (GTK_IS_CSS_PARSER (parser));
74 g_slice_free (GtkCssParser, parser);
78 _gtk_css_parser_is_eof (GtkCssParser *parser)
80 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), TRUE);
82 return *parser->data == 0;
86 _gtk_css_parser_begins_with (GtkCssParser *parser,
89 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), TRUE);
91 return *parser->data == c;
95 _gtk_css_parser_get_line (GtkCssParser *parser)
97 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), 1);
103 _gtk_css_parser_get_position (GtkCssParser *parser)
105 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), 1);
107 return parser->data - parser->line_start;
111 _gtk_css_parser_error (GtkCssParser *parser,
119 va_start (args, format);
120 error = g_error_new_valist (GTK_CSS_PROVIDER_ERROR,
121 GTK_CSS_PROVIDER_ERROR_SYNTAX,
125 parser->error_func (parser, error, parser->user_data);
127 g_error_free (error);
131 gtk_css_parser_new_line (GtkCssParser *parser)
133 gboolean result = FALSE;
135 if (*parser->data == '\r')
140 if (*parser->data == '\n')
149 parser->line_start = parser->data;
156 gtk_css_parser_skip_comment (GtkCssParser *parser)
158 if (parser->data[0] != '/' ||
159 parser->data[1] != '*')
164 while (*parser->data)
166 gsize len = strcspn (parser->data, NEWLINE_CHARS "/");
170 if (gtk_css_parser_new_line (parser))
175 if (parser->data[-2] == '*')
177 if (parser->data[0] == '*')
178 _gtk_css_parser_error (parser, "'/*' in comment block");
181 /* FIXME: position */
182 _gtk_css_parser_error (parser, "Unterminated comment");
187 _gtk_css_parser_skip_whitespace (GtkCssParser *parser)
191 while (*parser->data)
193 if (gtk_css_parser_new_line (parser))
196 len = strspn (parser->data, WHITESPACE_CHARS);
203 if (!gtk_css_parser_skip_comment (parser))
209 _gtk_css_parser_try (GtkCssParser *parser,
211 gboolean skip_whitespace)
213 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), FALSE);
214 g_return_val_if_fail (string != NULL, FALSE);
216 if (g_ascii_strncasecmp (parser->data, string, strlen (string)) != 0)
219 parser->data += strlen (string);
222 _gtk_css_parser_skip_whitespace (parser);
238 _gtk_css_parser_unescape (GtkCssParser *parser,
244 g_assert (*parser->data == '\\');
248 for (i = 0; i < 6; i++)
250 if (!g_ascii_isxdigit (parser->data[i]))
253 result = (result << 4) + get_xdigit (parser->data[i]);
258 g_string_append_unichar (str, result);
261 /* NB: gtk_css_parser_new_line() forward data pointer itself */
262 if (!gtk_css_parser_new_line (parser) &&
264 strchr (WHITESPACE_CHARS, *parser->data))
269 if (gtk_css_parser_new_line (parser))
272 g_string_append_c (str, *parser->data);
279 _gtk_css_parser_read_char (GtkCssParser *parser,
281 const char * allowed)
283 if (*parser->data == 0)
286 if (strchr (allowed, *parser->data))
288 g_string_append_c (str, *parser->data);
292 if (*parser->data >= 127)
294 gsize len = g_utf8_skip[(guint) *(guchar *) parser->data];
296 g_string_append_len (str, parser->data, len);
300 if (*parser->data == '\\')
302 _gtk_css_parser_unescape (parser, str);
310 _gtk_css_parser_try_name (GtkCssParser *parser,
311 gboolean skip_whitespace)
315 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), NULL);
317 name = g_string_new (NULL);
319 while (_gtk_css_parser_read_char (parser, name, NMCHAR))
323 _gtk_css_parser_skip_whitespace (parser);
325 return g_string_free (name, FALSE);
329 _gtk_css_parser_try_ident (GtkCssParser *parser,
330 gboolean skip_whitespace)
335 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), NULL);
337 start = parser->data;
339 ident = g_string_new (NULL);
341 if (*parser->data == '-')
343 g_string_append_c (ident, '-');
347 if (!_gtk_css_parser_read_char (parser, ident, NMSTART))
349 parser->data = start;
350 g_string_free (ident, TRUE);
354 while (_gtk_css_parser_read_char (parser, ident, NMCHAR))
358 _gtk_css_parser_skip_whitespace (parser);
360 return g_string_free (ident, FALSE);
364 _gtk_css_parser_is_string (GtkCssParser *parser)
366 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), FALSE);
368 return *parser->data == '"' || *parser->data == '\'';
372 _gtk_css_parser_read_string (GtkCssParser *parser)
377 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), NULL);
379 quote = *parser->data;
381 if (quote != '"' && quote != '\'')
385 str = g_string_new (NULL);
389 gsize len = strcspn (parser->data, "\\'\"\n\r\f");
391 g_string_append_len (str, parser->data, len);
395 switch (*parser->data)
398 _gtk_css_parser_unescape (parser, str);
402 if (*parser->data == quote)
405 _gtk_css_parser_skip_whitespace (parser);
406 return g_string_free (str, FALSE);
409 g_string_append_c (str, *parser->data);
413 /* FIXME: position */
414 _gtk_css_parser_error (parser, "Missing end quote in string.");
415 g_string_free (str, TRUE);
418 _gtk_css_parser_error (parser,
419 "Invalid character in string. Must be escaped.");
420 g_string_free (str, TRUE);
425 g_assert_not_reached ();
430 _gtk_css_parser_read_uri (GtkCssParser *parser)
434 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), NULL);
436 if (!_gtk_css_parser_try (parser, "url(", TRUE))
438 _gtk_css_parser_error (parser, "expected 'url('");
442 _gtk_css_parser_skip_whitespace (parser);
444 if (_gtk_css_parser_is_string (parser))
446 result = _gtk_css_parser_read_string (parser);
450 GString *str = g_string_new (NULL);
452 while (_gtk_css_parser_read_char (parser, str, URLCHAR))
454 result = g_string_free (str, FALSE);
456 _gtk_css_parser_error (parser, "not a url");
462 _gtk_css_parser_skip_whitespace (parser);
464 if (*parser->data != ')')
466 _gtk_css_parser_error (parser, "missing ')' for url");
473 _gtk_css_parser_skip_whitespace (parser);
479 _gtk_css_parser_try_int (GtkCssParser *parser,
485 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), FALSE);
486 g_return_val_if_fail (value != NULL, FALSE);
488 /* strtoll parses a plus, but we are not allowed to */
489 if (*parser->data == '+')
493 result = g_ascii_strtoll (parser->data, &end, 10);
496 if (result > G_MAXINT || result < G_MININT)
498 if (parser->data == end)
504 _gtk_css_parser_skip_whitespace (parser);
510 _gtk_css_parser_try_uint (GtkCssParser *parser,
516 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), FALSE);
517 g_return_val_if_fail (value != NULL, FALSE);
520 result = g_ascii_strtoull (parser->data, &end, 10);
523 if (result > G_MAXUINT)
525 if (parser->data == end)
531 _gtk_css_parser_skip_whitespace (parser);
537 _gtk_css_parser_try_double (GtkCssParser *parser,
543 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), FALSE);
544 g_return_val_if_fail (value != NULL, FALSE);
547 result = g_ascii_strtod (parser->data, &end);
550 if (parser->data == end)
556 _gtk_css_parser_skip_whitespace (parser);
571 static GtkSymbolicColor *
572 gtk_css_parser_read_symbolic_color_function (GtkCssParser *parser,
575 GtkSymbolicColor *symbolic;
576 GtkSymbolicColor *child1, *child2;
579 if (!_gtk_css_parser_try (parser, "(", TRUE))
581 _gtk_css_parser_error (parser, "Missing opening bracket in color definition");
585 if (color == COLOR_RGB || color == COLOR_RGBA)
591 for (i = 0; i < 3; i++)
593 if (i > 0 && !_gtk_css_parser_try (parser, ",", TRUE))
595 _gtk_css_parser_error (parser, "Expected ',' in color definition");
599 if (!_gtk_css_parser_try_double (parser, &tmp))
601 _gtk_css_parser_error (parser, "Invalid number for color value");
604 if (_gtk_css_parser_try (parser, "%", TRUE))
615 g_assert_not_reached ();
618 if (color == COLOR_RGBA)
620 if (i > 0 && !_gtk_css_parser_try (parser, ",", TRUE))
622 _gtk_css_parser_error (parser, "Expected ',' in color definition");
626 if (!_gtk_css_parser_try_double (parser, &rgba.alpha))
628 _gtk_css_parser_error (parser, "Invalid number for alpha value");
635 symbolic = gtk_symbolic_color_new_literal (&rgba);
639 child1 = _gtk_css_parser_read_symbolic_color (parser);
643 if (color == COLOR_MIX)
645 if (!_gtk_css_parser_try (parser, ",", TRUE))
647 _gtk_css_parser_error (parser, "Expected ',' in color definition");
648 gtk_symbolic_color_unref (child1);
652 child2 = _gtk_css_parser_read_symbolic_color (parser);
655 g_object_unref (child1);
662 if (color == COLOR_LIGHTER)
664 else if (color == COLOR_DARKER)
668 if (!_gtk_css_parser_try (parser, ",", TRUE))
670 _gtk_css_parser_error (parser, "Expected ',' in color definition");
671 gtk_symbolic_color_unref (child1);
673 gtk_symbolic_color_unref (child2);
677 if (!_gtk_css_parser_try_double (parser, &value))
679 _gtk_css_parser_error (parser, "Expected number in color definition");
680 gtk_symbolic_color_unref (child1);
682 gtk_symbolic_color_unref (child2);
692 symbolic = gtk_symbolic_color_new_shade (child1, value);
695 symbolic = gtk_symbolic_color_new_alpha (child1, value);
698 symbolic = gtk_symbolic_color_new_mix (child1, child2, value);
701 g_assert_not_reached ();
705 gtk_symbolic_color_unref (child1);
707 gtk_symbolic_color_unref (child2);
710 if (!_gtk_css_parser_try (parser, ")", TRUE))
712 gtk_symbolic_color_unref (symbolic);
719 static GtkSymbolicColor *
720 gtk_css_parser_try_hash_color (GtkCssParser *parser)
722 if (parser->data[0] == '#' &&
723 g_ascii_isxdigit (parser->data[1]) &&
724 g_ascii_isxdigit (parser->data[2]) &&
725 g_ascii_isxdigit (parser->data[3]))
729 if (g_ascii_isxdigit (parser->data[4]) &&
730 g_ascii_isxdigit (parser->data[5]) &&
731 g_ascii_isxdigit (parser->data[6]))
733 rgba.red = ((get_xdigit (parser->data[1]) << 4) + get_xdigit (parser->data[2])) / 255.0;
734 rgba.green = ((get_xdigit (parser->data[3]) << 4) + get_xdigit (parser->data[4])) / 255.0;
735 rgba.blue = ((get_xdigit (parser->data[5]) << 4) + get_xdigit (parser->data[6])) / 255.0;
741 rgba.red = get_xdigit (parser->data[1]) / 15.0;
742 rgba.green = get_xdigit (parser->data[2]) / 15.0;
743 rgba.blue = get_xdigit (parser->data[3]) / 15.0;
748 _gtk_css_parser_skip_whitespace (parser);
750 return gtk_symbolic_color_new_literal (&rgba);
757 _gtk_css_parser_read_symbolic_color (GtkCssParser *parser)
759 GtkSymbolicColor *symbolic;
761 const char *names[] = {"rgba", "rgb", "lighter", "darker", "shade", "alpha", "mix" };
764 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), NULL);
766 if (_gtk_css_parser_try (parser, "@", FALSE))
768 name = _gtk_css_parser_try_name (parser, TRUE);
772 symbolic = gtk_symbolic_color_new_name (name);
776 _gtk_css_parser_error (parser, "'%s' is not a valid symbolic color name", name);
784 for (color = 0; color < G_N_ELEMENTS (names); color++)
786 if (_gtk_css_parser_try (parser, names[color], TRUE))
790 if (color < G_N_ELEMENTS (names))
791 return gtk_css_parser_read_symbolic_color_function (parser, color);
793 symbolic = gtk_css_parser_try_hash_color (parser);
797 name = _gtk_css_parser_try_name (parser, TRUE);
802 if (gdk_rgba_parse (&rgba, name))
804 symbolic = gtk_symbolic_color_new_literal (&rgba);
808 _gtk_css_parser_error (parser, "'%s' is not a valid color name", name);
815 _gtk_css_parser_error (parser, "Not a color definition");
820 _gtk_css_parser_resync_internal (GtkCssParser *parser,
821 gboolean sync_at_semicolon,
822 gboolean read_sync_token,
828 len = strcspn (parser->data, "\\\"'/()[]{};" NEWLINE_CHARS);
831 if (gtk_css_parser_new_line (parser))
834 if (_gtk_css_parser_is_string (parser))
836 /* Hrm, this emits errors, and i suspect it shouldn't... */
837 char *free_me = _gtk_css_parser_read_string (parser);
842 if (gtk_css_parser_skip_comment (parser))
845 switch (*parser->data)
849 GString *ignore = g_string_new (NULL);
850 _gtk_css_parser_unescape (parser, ignore);
851 g_string_free (ignore, TRUE);
855 if (sync_at_semicolon && !read_sync_token)
858 if (sync_at_semicolon)
860 _gtk_css_parser_skip_whitespace (parser);
866 _gtk_css_parser_resync (parser, FALSE, ')');
871 _gtk_css_parser_resync (parser, FALSE, ']');
876 _gtk_css_parser_resync (parser, FALSE, '}');
878 if (sync_at_semicolon || !terminator)
880 _gtk_css_parser_skip_whitespace (parser);
887 if (terminator == *parser->data)
889 _gtk_css_parser_skip_whitespace (parser);
897 } while (*parser->data);
901 _gtk_css_parser_read_value (GtkCssParser *parser)
906 g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), NULL);
908 start = parser->data;
910 /* This needs to be done better */
911 _gtk_css_parser_resync_internal (parser, TRUE, FALSE, '}');
913 result = g_strndup (start, parser->data - start);
925 _gtk_css_parser_error (parser, "Expected a property value");
931 _gtk_css_parser_resync (GtkCssParser *parser,
932 gboolean sync_at_semicolon,
935 g_return_if_fail (GTK_IS_CSS_PARSER (parser));
937 _gtk_css_parser_resync_internal (parser, sync_at_semicolon, TRUE, terminator);