1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
3 /* GIO - GLib Input, Output and Streaming Library
5 * Copyright (C) 2006-2007 Red Hat, Inc.
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General
18 * Public License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
20 * Boston, MA 02111-1307, USA.
22 * Author: Alexander Larsson <alexl@redhat.com>
26 #include <sys/types.h>
30 #include "gcontenttypeprivate.h"
31 #include "gthemedicon.h"
34 #include "gfileenumerator.h"
35 #include "gfileinfo.h"
40 * SECTION:gcontenttype
41 * @short_description: Platform-specific content typing
44 * A content type is a platform specific string that defines the type
45 * of a file. On UNIX it is a <ulink url="http://www.wikipedia.org/wiki/Internet_media_type>mime type</ulink> like "text/plain" or "image/png".
46 * On Win32 it is an extension string like ".doc", ".txt" or a perceived
47 * string like "audio". Such strings can be looked up in the registry at
56 get_registry_classes_key (const char *subdir,
57 const wchar_t *key_name)
68 wc_key = g_utf8_to_utf16 (subdir, -1, NULL, NULL, NULL);
69 if (RegOpenKeyExW (HKEY_CLASSES_ROOT, wc_key, 0,
70 KEY_QUERY_VALUE, ®_key) == ERROR_SUCCESS &&
71 RegQueryValueExW (reg_key, key_name, 0,
72 &key_type, NULL, &nbytes) == ERROR_SUCCESS &&
73 (key_type == REG_SZ || key_type == REG_EXPAND_SZ))
75 wchar_t *wc_temp = g_new (wchar_t, (nbytes+1)/2 + 1);
76 RegQueryValueExW (reg_key, key_name, 0,
77 &key_type, (LPBYTE) wc_temp, &nbytes);
78 wc_temp[nbytes/2] = '\0';
79 if (key_type == REG_EXPAND_SZ)
82 int len = ExpandEnvironmentStringsW (wc_temp, dummy, 1);
85 wchar_t *wc_temp_expanded = g_new (wchar_t, len);
86 if (ExpandEnvironmentStringsW (wc_temp, wc_temp_expanded, len) == len)
87 value_utf8 = g_utf16_to_utf8 (wc_temp_expanded, -1, NULL, NULL, NULL);
88 g_free (wc_temp_expanded);
93 value_utf8 = g_utf16_to_utf8 (wc_temp, -1, NULL, NULL, NULL);
101 RegCloseKey (reg_key);
107 g_content_type_equals (const gchar *type1,
110 char *progid1, *progid2;
113 g_return_val_if_fail (type1 != NULL, FALSE);
114 g_return_val_if_fail (type2 != NULL, FALSE);
116 if (g_ascii_strcasecmp (type1, type2) == 0)
120 progid1 = get_registry_classes_key (type1, NULL);
121 progid2 = get_registry_classes_key (type2, NULL);
122 if (progid1 != NULL && progid2 != NULL &&
123 strcmp (progid1, progid2) == 0)
132 g_content_type_is_a (const gchar *type,
133 const gchar *supertype)
138 g_return_val_if_fail (type != NULL, FALSE);
139 g_return_val_if_fail (supertype != NULL, FALSE);
141 if (g_content_type_equals (type, supertype))
145 value_utf8 = get_registry_classes_key (type, L"PerceivedType");
146 if (value_utf8 && strcmp (value_utf8, supertype) == 0)
154 g_content_type_is_unknown (const gchar *type)
156 g_return_val_if_fail (type != NULL, FALSE);
158 return strcmp ("*", type) == 0;
162 g_content_type_get_description (const gchar *type)
167 g_return_val_if_fail (type != NULL, NULL);
169 progid = get_registry_classes_key (type, NULL);
172 description = get_registry_classes_key (progid, NULL);
179 if (g_content_type_is_unknown (type))
180 return g_strdup (_("Unknown type"));
181 return g_strdup_printf (_("%s filetype"), type);
185 g_content_type_get_mime_type (const gchar *type)
189 g_return_val_if_fail (type != NULL, NULL);
191 mime = get_registry_classes_key (type, L"Content Type");
194 else if (g_content_type_is_unknown (type))
195 return g_strdup ("application/octet-stream");
196 else if (*type == '.')
197 return g_strdup_printf ("application/x-ext-%s", type+1);
198 /* TODO: Map "image" to "image/ *", etc? */
200 return g_strdup ("application/octet-stream");
203 G_LOCK_DEFINE_STATIC (_type_icons);
204 static GHashTable *_type_icons = NULL;
207 g_content_type_get_icon (const gchar *type)
212 g_return_val_if_fail (type != NULL, NULL);
214 /* In the Registry icons are the default value of
215 HKEY_CLASSES_ROOT\<progid>\DefaultIcon with typical values like:
217 REG_EXPAND_SZ: %SystemRoot%\System32\Wscript.exe,3
218 REG_SZ: shimgvw.dll,3
220 G_LOCK (_type_icons);
222 _type_icons = g_hash_table_new (g_str_hash, g_str_equal);
223 name = g_hash_table_lookup (_type_icons, type);
224 if (!name && type[0] == '.')
226 /* double lookup by extension */
227 gchar *key = get_registry_classes_key (type, NULL);
229 key = g_strconcat (type+1, "file\\DefaultIcon", NULL);
232 gchar *key2 = g_strconcat (key, "\\DefaultIcon", NULL);
236 name = get_registry_classes_key (key, NULL);
237 if (name && strcmp (name, "%1") == 0)
243 g_hash_table_insert (_type_icons, g_strdup (type), g_strdup (name));
247 /* icon-name similar to how it was with gtk-2-12 */
250 themed_icon = g_themed_icon_new (name);
254 /* if not found an icon fall back to gtk-builtins */
255 name = strcmp (type, "inode/directory") == 0 ? "gtk-directory" :
256 g_content_type_can_be_executable (type) ? "gtk-execute" : "gtk-file";
257 g_hash_table_insert (_type_icons, g_strdup (type), g_strdup (name));
258 themed_icon = g_themed_icon_new_with_default_fallbacks (name);
260 G_UNLOCK (_type_icons);
262 return G_ICON (themed_icon);
266 g_content_type_can_be_executable (const gchar *type)
268 g_return_val_if_fail (type != NULL, FALSE);
270 if (strcmp (type, ".exe") == 0 ||
271 strcmp (type, ".com") == 0 ||
272 strcmp (type, ".bat") == 0)
275 /* TODO: Also look at PATHEXT, which lists the extensions for
276 * "scripts" in addition to those for true binary executables.
278 * (PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH for me
279 * right now, for instance). And in a sense, all associated file
280 * types are "executable" on Windows... You can just type foo.jpg as
281 * a command name in cmd.exe, and it will run the application
282 * associated with .jpg. Hard to say what this API actually means
290 looks_like_text (const guchar *data,
295 for (i = 0; i < data_size; i++)
298 if (g_ascii_iscntrl (c) && !g_ascii_isspace (c) && c != '\b')
305 g_content_type_from_mime_type (const gchar *mime_type)
307 char *key, *content_type;
309 g_return_val_if_fail (mime_type != NULL, NULL);
311 key = g_strconcat ("MIME\\DataBase\\Content Type\\", mime_type, NULL);
312 content_type = get_registry_classes_key (key, L"Extension");
319 g_content_type_guess (const gchar *filename,
322 gboolean *result_uncertain)
330 if (result_uncertain)
331 *result_uncertain = FALSE;
335 basename = g_path_get_basename (filename);
336 dot = strrchr (basename, '.');
338 type = g_strdup (dot);
345 if (data && looks_like_text (data, data_size))
346 return g_strdup (".txt");
348 return g_strdup ("*");
352 g_content_types_get_registered (void)
355 wchar_t keyname[256];
363 while (RegEnumKeyExW(HKEY_CLASSES_ROOT,
370 NULL) == ERROR_SUCCESS)
372 key_utf8 = g_utf16_to_utf8 (keyname, -1, NULL, NULL, NULL);
375 if (*key_utf8 == '.')
376 types = g_list_prepend (types, key_utf8);
384 return g_list_reverse (types);
388 g_content_type_guess_for_tree (GFile *root)
390 /* FIXME: implement */
394 #else /* !G_OS_WIN32 - Unix specific version */
398 #define XDG_PREFIX _gio_xdg
399 #include "xdgmime/xdgmime.h"
401 /* We lock this mutex whenever we modify global state in this module. */
402 G_LOCK_DEFINE_STATIC (gio_xdgmime);
405 _g_unix_content_type_get_sniff_len (void)
409 G_LOCK (gio_xdgmime);
410 size = xdg_mime_get_max_buffer_extents ();
411 G_UNLOCK (gio_xdgmime);
417 _g_unix_content_type_unalias (const gchar *type)
421 G_LOCK (gio_xdgmime);
422 res = g_strdup (xdg_mime_unalias_mime_type (type));
423 G_UNLOCK (gio_xdgmime);
429 _g_unix_content_type_get_parents (const gchar *type)
436 array = g_ptr_array_new ();
438 G_LOCK (gio_xdgmime);
440 umime = xdg_mime_unalias_mime_type (type);
442 g_ptr_array_add (array, g_strdup (umime));
444 parents = xdg_mime_list_mime_parents (umime);
445 for (i = 0; parents && parents[i] != NULL; i++)
446 g_ptr_array_add (array, g_strdup (parents[i]));
450 G_UNLOCK (gio_xdgmime);
452 g_ptr_array_add (array, NULL);
454 return (gchar **)g_ptr_array_free (array, FALSE);
458 * g_content_type_equals:
459 * @type1: a content type string
460 * @type2: a content type string
462 * Compares two content types for equality.
464 * Returns: %TRUE if the two strings are identical or equivalent,
468 g_content_type_equals (const gchar *type1,
473 g_return_val_if_fail (type1 != NULL, FALSE);
474 g_return_val_if_fail (type2 != NULL, FALSE);
476 G_LOCK (gio_xdgmime);
477 res = xdg_mime_mime_type_equal (type1, type2);
478 G_UNLOCK (gio_xdgmime);
484 * g_content_type_is_a:
485 * @type: a content type string
486 * @supertype: a content type string
488 * Determines if @type is a subset of @supertype.
490 * Returns: %TRUE if @type is a kind of @supertype,
494 g_content_type_is_a (const gchar *type,
495 const gchar *supertype)
499 g_return_val_if_fail (type != NULL, FALSE);
500 g_return_val_if_fail (supertype != NULL, FALSE);
502 G_LOCK (gio_xdgmime);
503 res = xdg_mime_mime_type_subclass (type, supertype);
504 G_UNLOCK (gio_xdgmime);
510 * g_content_type_is_unknown:
511 * @type: a content type string
513 * Checks if the content type is the generic "unknown" type.
514 * On UNIX this is the "application/octet-stream" mimetype,
515 * while on win32 it is "*".
517 * Returns: %TRUE if the type is the unknown type.
520 g_content_type_is_unknown (const gchar *type)
522 g_return_val_if_fail (type != NULL, FALSE);
524 return strcmp (XDG_MIME_TYPE_UNKNOWN, type) == 0;
530 MIME_TAG_TYPE_COMMENT
535 int current_lang_level;
536 int comment_lang_level;
542 language_level (const char *lang)
544 const char * const *lang_list;
547 /* The returned list is sorted from most desirable to least
548 desirable and always contains the default locale "C". */
549 lang_list = g_get_language_names ();
551 for (i = 0; lang_list[i]; i++)
552 if (strcmp (lang_list[i], lang) == 0)
559 mime_info_start_element (GMarkupParseContext *context,
560 const gchar *element_name,
561 const gchar **attribute_names,
562 const gchar **attribute_values,
568 MimeParser *parser = user_data;
570 if (strcmp (element_name, "comment") == 0)
573 for (i = 0; attribute_names[i]; i++)
574 if (strcmp (attribute_names[i], "xml:lang") == 0)
576 lang = attribute_values[i];
580 parser->current_lang_level = language_level (lang);
581 parser->current_type = MIME_TAG_TYPE_COMMENT;
584 parser->current_type = MIME_TAG_TYPE_OTHER;
588 mime_info_end_element (GMarkupParseContext *context,
589 const gchar *element_name,
593 MimeParser *parser = user_data;
595 parser->current_type = MIME_TAG_TYPE_OTHER;
599 mime_info_text (GMarkupParseContext *context,
605 MimeParser *parser = user_data;
607 if (parser->current_type == MIME_TAG_TYPE_COMMENT &&
608 parser->current_lang_level > parser->comment_lang_level)
610 g_free (parser->comment);
611 parser->comment = g_strndup (text, text_len);
612 parser->comment_lang_level = parser->current_lang_level;
617 load_comment_for_mime_helper (const char *dir,
618 const char *basename)
620 GMarkupParseContext *context;
621 char *filename, *data;
624 MimeParser parse_data = {0};
625 GMarkupParser parser = {
626 mime_info_start_element,
627 mime_info_end_element,
631 filename = g_build_filename (dir, "mime", basename, NULL);
633 res = g_file_get_contents (filename, &data, &len, NULL);
638 context = g_markup_parse_context_new (&parser, 0, &parse_data, NULL);
639 res = g_markup_parse_context_parse (context, data, len, NULL);
641 g_markup_parse_context_free (context);
646 return parse_data.comment;
651 load_comment_for_mime (const char *mimetype)
653 const char * const* dirs;
658 basename = g_strdup_printf ("%s.xml", mimetype);
660 comment = load_comment_for_mime_helper (g_get_user_data_dir (), basename);
667 dirs = g_get_system_data_dirs ();
669 for (i = 0; dirs[i] != NULL; i++)
671 comment = load_comment_for_mime_helper (dirs[i], basename);
680 return g_strdup_printf (_("%s type"), mimetype);
684 * g_content_type_get_description:
685 * @type: a content type string
687 * Gets the human readable description of the content type.
689 * Returns: a short description of the content type @type. Free the
690 * returned string with g_free()
693 g_content_type_get_description (const gchar *type)
695 static GHashTable *type_comment_cache = NULL;
698 g_return_val_if_fail (type != NULL, NULL);
700 G_LOCK (gio_xdgmime);
701 type = xdg_mime_unalias_mime_type (type);
703 if (type_comment_cache == NULL)
704 type_comment_cache = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
706 comment = g_hash_table_lookup (type_comment_cache, type);
707 comment = g_strdup (comment);
708 G_UNLOCK (gio_xdgmime);
713 comment = load_comment_for_mime (type);
715 G_LOCK (gio_xdgmime);
716 g_hash_table_insert (type_comment_cache,
719 G_UNLOCK (gio_xdgmime);
725 * g_content_type_get_mime_type:
726 * @type: a content type string
728 * Gets the mime type for the content type, if one is registered.
730 * Returns: (allow-none): the registered mime type for the given @type,
731 * or %NULL if unknown.
734 g_content_type_get_mime_type (const char *type)
736 g_return_val_if_fail (type != NULL, NULL);
738 return g_strdup (type);
742 * g_content_type_get_icon:
743 * @type: a content type string
745 * Gets the icon for a content type.
747 * Returns: (transfer full): #GIcon corresponding to the content type. Free the returned
748 * object with g_object_unref()
751 g_content_type_get_icon (const gchar *type)
753 char *mimetype_icon, *generic_mimetype_icon, *q;
754 char *xdg_mimetype_icon, *legacy_mimetype_icon;
755 char *xdg_mimetype_generic_icon;
761 g_return_val_if_fail (type != NULL, NULL);
763 G_LOCK (gio_xdgmime);
764 xdg_mimetype_icon = g_strdup (xdg_mime_get_icon (type));
765 xdg_mimetype_generic_icon = g_strdup (xdg_mime_get_generic_icon (type));
766 G_UNLOCK (gio_xdgmime);
768 mimetype_icon = g_strdup (type);
770 while ((q = strchr (mimetype_icon, '/')) != NULL)
773 p = strchr (type, '/');
775 p = type + strlen (type);
777 /* Not all icons have migrated to the new icon theme spec, look for old names too */
778 legacy_mimetype_icon = g_strconcat ("gnome-mime-", mimetype_icon, NULL);
780 generic_mimetype_icon = g_malloc (p - type + strlen ("-x-generic") + 1);
781 memcpy (generic_mimetype_icon, type, p - type);
782 memcpy (generic_mimetype_icon + (p - type), "-x-generic", strlen ("-x-generic"));
783 generic_mimetype_icon[(p - type) + strlen ("-x-generic")] = 0;
785 if (xdg_mimetype_icon)
786 icon_names[n++] = xdg_mimetype_icon;
788 icon_names[n++] = mimetype_icon;
789 icon_names[n++] = legacy_mimetype_icon;
791 if (xdg_mimetype_generic_icon)
792 icon_names[n++] = xdg_mimetype_generic_icon;
794 icon_names[n++] = generic_mimetype_icon;
796 themed_icon = g_themed_icon_new_from_names (icon_names, n);
798 g_free (xdg_mimetype_icon);
799 g_free (xdg_mimetype_generic_icon);
800 g_free (mimetype_icon);
801 g_free (legacy_mimetype_icon);
802 g_free (generic_mimetype_icon);
808 * g_content_type_can_be_executable:
809 * @type: a content type string
811 * Checks if a content type can be executable. Note that for instance
812 * things like text files can be executables (i.e. scripts and batch files).
814 * Returns: %TRUE if the file type corresponds to a type that
815 * can be executable, %FALSE otherwise.
818 g_content_type_can_be_executable (const gchar *type)
820 g_return_val_if_fail (type != NULL, FALSE);
822 if (g_content_type_is_a (type, "application/x-executable") ||
823 g_content_type_is_a (type, "text/plain"))
830 looks_like_text (const guchar *data, gsize data_size)
835 for (i = 0; i < data_size; i++)
839 if (g_ascii_iscntrl (c) &&
840 !g_ascii_isspace (c) &&
848 * g_content_type_from_mime_type:
849 * @mime_type: a mime type string
851 * Tries to find a content type based on the mime type name.
853 * Returns: (allow-none): Newly allocated string with content type
854 * or %NULL. Free with g_free()
859 g_content_type_from_mime_type (const gchar *mime_type)
863 g_return_val_if_fail (mime_type != NULL, NULL);
865 G_LOCK (gio_xdgmime);
866 /* mime type and content type are same on unixes */
867 umime = g_strdup (xdg_mime_unalias_mime_type (mime_type));
868 G_UNLOCK (gio_xdgmime);
874 * g_content_type_guess:
875 * @filename: (allow-none): a string, or %NULL
876 * @data: (allow-none) (array length=data_size): a stream of data, or %NULL
877 * @data_size: the size of @data
878 * @result_uncertain: (allow-none) (out): return location for the certainty
879 * of the result, or %NULL
881 * Guesses the content type based on example data. If the function is
882 * uncertain, @result_uncertain will be set to %TRUE. Either @filename
883 * or @data may be %NULL, in which case the guess will be based solely
884 * on the other argument.
886 * Returns: a string indicating a guessed content type for the
887 * given data. Free with g_free()
890 g_content_type_guess (const gchar *filename,
893 gboolean *result_uncertain)
896 const char *name_mimetypes[10], *sniffed_mimetype;
899 int n_name_mimetypes;
903 n_name_mimetypes = 0;
904 sniffed_mimetype = XDG_MIME_TYPE_UNKNOWN;
906 if (result_uncertain)
907 *result_uncertain = FALSE;
909 G_LOCK (gio_xdgmime);
913 i = strlen (filename);
914 if (filename[i - 1] == '/')
916 name_mimetypes[0] = "inode/directory";
917 name_mimetypes[1] = NULL;
918 n_name_mimetypes = 1;
919 if (result_uncertain)
920 *result_uncertain = TRUE;
924 basename = g_path_get_basename (filename);
925 n_name_mimetypes = xdg_mime_get_mime_types_from_file_name (basename, name_mimetypes, 10);
930 /* Got an extension match, and no conflicts. This is it. */
931 if (n_name_mimetypes == 1)
933 G_UNLOCK (gio_xdgmime);
934 return g_strdup (name_mimetypes[0]);
939 sniffed_mimetype = xdg_mime_get_mime_type_for_data (data, data_size, &sniffed_prio);
940 if (sniffed_mimetype == XDG_MIME_TYPE_UNKNOWN &&
942 looks_like_text (data, data_size))
943 sniffed_mimetype = "text/plain";
945 /* For security reasons we don't ever want to sniff desktop files
946 * where we know the filename and it doesn't have a .desktop extension.
947 * This is because desktop files allow executing any application and
948 * we don't want to make it possible to hide them looking like something
951 if (filename != NULL &&
952 strcmp (sniffed_mimetype, "application/x-desktop") == 0)
953 sniffed_mimetype = "text/plain";
956 if (n_name_mimetypes == 0)
958 if (sniffed_mimetype == XDG_MIME_TYPE_UNKNOWN &&
960 *result_uncertain = TRUE;
962 mimetype = g_strdup (sniffed_mimetype);
967 if (sniffed_mimetype != XDG_MIME_TYPE_UNKNOWN)
969 if (sniffed_prio >= 80) /* High priority sniffing match, use that */
970 mimetype = g_strdup (sniffed_mimetype);
973 /* There are conflicts between the name matches and we
974 * have a sniffed type, use that as a tie breaker.
976 for (i = 0; i < n_name_mimetypes; i++)
978 if ( xdg_mime_mime_type_subclass (name_mimetypes[i], sniffed_mimetype))
980 /* This nametype match is derived from (or the same as)
981 * the sniffed type). This is probably it.
983 mimetype = g_strdup (name_mimetypes[i]);
990 if (mimetype == NULL)
992 /* Conflicts, and sniffed type was no help or not there.
993 * Guess on the first one
995 mimetype = g_strdup (name_mimetypes[0]);
996 if (result_uncertain)
997 *result_uncertain = TRUE;
1001 G_UNLOCK (gio_xdgmime);
1007 enumerate_mimetypes_subdir (const char *dir,
1009 GHashTable *mimetypes)
1018 while ((ent = readdir (d)) != NULL)
1020 if (g_str_has_suffix (ent->d_name, ".xml"))
1022 mimetype = g_strdup_printf ("%s/%.*s", prefix, (int) strlen (ent->d_name) - 4, ent->d_name);
1023 g_hash_table_replace (mimetypes, mimetype, NULL);
1031 enumerate_mimetypes_dir (const char *dir,
1032 GHashTable *mimetypes)
1039 mimedir = g_build_filename (dir, "mime", NULL);
1041 d = opendir (mimedir);
1044 while ((ent = readdir (d)) != NULL)
1046 if (strcmp (ent->d_name, "packages") != 0)
1048 name = g_build_filename (mimedir, ent->d_name, NULL);
1049 if (g_file_test (name, G_FILE_TEST_IS_DIR))
1050 enumerate_mimetypes_subdir (name, ent->d_name, mimetypes);
1061 * g_content_types_get_registered:
1063 * Gets a list of strings containing all the registered content types
1064 * known to the system. The list and its data should be freed using
1066 * g_list_foreach (list, g_free, NULL);
1067 * g_list_free (list);
1070 * Returns: (element-type utf8) (transfer full): #GList of the registered content types
1073 g_content_types_get_registered (void)
1075 const char * const* dirs;
1076 GHashTable *mimetypes;
1077 GHashTableIter iter;
1082 mimetypes = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
1084 enumerate_mimetypes_dir (g_get_user_data_dir (), mimetypes);
1085 dirs = g_get_system_data_dirs ();
1087 for (i = 0; dirs[i] != NULL; i++)
1088 enumerate_mimetypes_dir (dirs[i], mimetypes);
1091 g_hash_table_iter_init (&iter, mimetypes);
1092 while (g_hash_table_iter_next (&iter, &key, NULL))
1094 l = g_list_prepend (l, key);
1095 g_hash_table_iter_steal (&iter);
1098 g_hash_table_destroy (mimetypes);
1104 /* tree magic data */
1105 static GList *tree_matches = NULL;
1106 static gboolean need_reload = FALSE;
1108 G_LOCK_DEFINE_STATIC (gio_treemagic);
1114 guint match_case : 1;
1115 guint executable : 1;
1116 guint non_empty : 1;
1131 tree_matchlet_free (TreeMatchlet *matchlet)
1133 g_list_foreach (matchlet->matches, (GFunc)tree_matchlet_free, NULL);
1134 g_list_free (matchlet->matches);
1135 g_free (matchlet->path);
1136 g_free (matchlet->mimetype);
1137 g_slice_free (TreeMatchlet, matchlet);
1141 tree_match_free (TreeMatch *match)
1143 g_list_foreach (match->matches, (GFunc)tree_matchlet_free, NULL);
1144 g_list_free (match->matches);
1145 g_free (match->contenttype);
1146 g_slice_free (TreeMatch, match);
1150 parse_header (gchar *line)
1156 len = strlen (line);
1158 if (line[0] != '[' || line[len - 1] != ']')
1162 s = strchr (line, ':');
1164 match = g_slice_new0 (TreeMatch);
1165 match->priority = atoi (line + 1);
1166 match->contenttype = g_strdup (s + 1);
1171 static TreeMatchlet *
1172 parse_match_line (gchar *line,
1176 TreeMatchlet *matchlet;
1180 matchlet = g_slice_new0 (TreeMatchlet);
1189 *depth = atoi (line);
1190 s = strchr (line, '>');
1193 p = strchr (s, '"');
1196 matchlet->path = g_strdup (s);
1198 parts = g_strsplit (s, ",", 0);
1199 if (strcmp (parts[0], "=file") == 0)
1200 matchlet->type = G_FILE_TYPE_REGULAR;
1201 else if (strcmp (parts[0], "=directory") == 0)
1202 matchlet->type = G_FILE_TYPE_DIRECTORY;
1203 else if (strcmp (parts[0], "=link") == 0)
1204 matchlet->type = G_FILE_TYPE_SYMBOLIC_LINK;
1206 matchlet->type = G_FILE_TYPE_UNKNOWN;
1207 for (i = 1; parts[i]; i++)
1209 if (strcmp (parts[i], "executable") == 0)
1210 matchlet->executable = 1;
1211 else if (strcmp (parts[i], "match-case") == 0)
1212 matchlet->match_case = 1;
1213 else if (strcmp (parts[i], "non-empty") == 0)
1214 matchlet->non_empty = 1;
1215 else if (strcmp (parts[i], "on-disc") == 0)
1216 matchlet->on_disc = 1;
1218 matchlet->mimetype = g_strdup (parts[i]);
1227 cmp_match (gconstpointer a, gconstpointer b)
1229 const TreeMatch *aa = (const TreeMatch *)a;
1230 const TreeMatch *bb = (const TreeMatch *)b;
1232 return bb->priority - aa->priority;
1236 insert_match (TreeMatch *match)
1238 tree_matches = g_list_insert_sorted (tree_matches, match, cmp_match);
1242 insert_matchlet (TreeMatch *match,
1243 TreeMatchlet *matchlet,
1247 match->matches = g_list_append (match->matches, matchlet);
1253 last = g_list_last (match->matches);
1256 tree_matchlet_free (matchlet);
1257 g_warning ("can't insert tree matchlet at depth %d", depth);
1261 m = (TreeMatchlet *) last->data;
1264 last = g_list_last (m->matches);
1267 tree_matchlet_free (matchlet);
1268 g_warning ("can't insert tree matchlet at depth %d", depth);
1272 m = (TreeMatchlet *) last->data;
1274 m->matches = g_list_append (m->matches, matchlet);
1279 read_tree_magic_from_directory (const gchar *prefix)
1287 TreeMatchlet *matchlet;
1290 filename = g_build_filename (prefix, "mime", "treemagic", NULL);
1292 if (g_file_get_contents (filename, &text, &len, NULL))
1294 if (strcmp (text, "MIME-TreeMagic") == 0)
1296 lines = g_strsplit (text + strlen ("MIME-TreeMagic") + 2, "\n", 0);
1298 for (i = 0; lines[i] && lines[i][0]; i++)
1300 if (lines[i][0] == '[')
1302 match = parse_header (lines[i]);
1303 insert_match (match);
1307 matchlet = parse_match_line (lines[i], &depth);
1308 insert_matchlet (match, matchlet, depth);
1315 g_warning ("%s: header not found, skipping\n", filename);
1325 xdg_mime_reload (void *user_data)
1331 tree_magic_shutdown (void)
1333 g_list_foreach (tree_matches, (GFunc)tree_match_free, NULL);
1334 g_list_free (tree_matches);
1335 tree_matches = NULL;
1339 tree_magic_init (void)
1341 static gboolean initialized = FALSE;
1343 const gchar * const * dirs;
1350 xdg_mime_register_reload_callback (xdg_mime_reload, NULL, NULL);
1356 need_reload = FALSE;
1358 tree_magic_shutdown ();
1360 dir = g_get_user_data_dir ();
1361 read_tree_magic_from_directory (dir);
1362 dirs = g_get_system_data_dirs ();
1363 for (i = 0; dirs[i]; i++)
1364 read_tree_magic_from_directory (dirs[i]);
1368 /* a filtering enumerator */
1374 gboolean ignore_case;
1376 gchar **case_components;
1377 GFileEnumerator **enumerators;
1382 component_match (Enumerator *e,
1386 gchar *case_folded, *key;
1389 if (strcmp (name, e->components[depth]) == 0)
1392 if (!e->ignore_case)
1395 case_folded = g_utf8_casefold (name, -1);
1396 key = g_utf8_collate_key (case_folded, -1);
1398 found = strcmp (key, e->case_components[depth]) == 0;
1400 g_free (case_folded);
1407 next_match_recurse (Enumerator *e,
1416 if (e->enumerators[depth] == NULL)
1420 file = next_match_recurse (e, depth - 1);
1423 e->children[depth] = file;
1424 e->enumerators[depth] = g_file_enumerate_children (file,
1425 G_FILE_ATTRIBUTE_STANDARD_NAME,
1426 G_FILE_QUERY_INFO_NONE,
1431 if (e->enumerators[depth] == NULL)
1435 while ((info = g_file_enumerator_next_file (e->enumerators[depth], NULL, NULL)))
1437 name = g_file_info_get_name (info);
1438 if (component_match (e, depth, name))
1440 file = g_file_get_child (e->children[depth], name);
1441 g_object_unref (info);
1444 g_object_unref (info);
1447 g_object_unref (e->enumerators[depth]);
1448 e->enumerators[depth] = NULL;
1449 g_object_unref (e->children[depth]);
1450 e->children[depth] = NULL;
1455 enumerator_next (Enumerator *e)
1457 return next_match_recurse (e, e->depth - 1);
1461 enumerator_new (GFile *root,
1463 gboolean ignore_case)
1469 e = g_new0 (Enumerator, 1);
1470 e->path = g_strdup (path);
1471 e->ignore_case = ignore_case;
1473 e->components = g_strsplit (e->path, G_DIR_SEPARATOR_S, -1);
1474 e->depth = g_strv_length (e->components);
1477 e->case_components = g_new0 (char *, e->depth + 1);
1478 for (i = 0; e->components[i]; i++)
1480 case_folded = g_utf8_casefold (e->components[i], -1);
1481 e->case_components[i] = g_utf8_collate_key (case_folded, -1);
1482 g_free (case_folded);
1486 e->children = g_new0 (GFile *, e->depth);
1487 e->children[0] = g_object_ref (root);
1488 e->enumerators = g_new0 (GFileEnumerator *, e->depth);
1489 e->enumerators[0] = g_file_enumerate_children (root,
1490 G_FILE_ATTRIBUTE_STANDARD_NAME,
1491 G_FILE_QUERY_INFO_NONE,
1499 enumerator_free (Enumerator *e)
1503 for (i = 0; i < e->depth; i++)
1505 if (e->enumerators[i])
1506 g_object_unref (e->enumerators[i]);
1508 g_object_unref (e->children[i]);
1511 g_free (e->enumerators);
1512 g_free (e->children);
1513 g_strfreev (e->components);
1514 if (e->case_components)
1515 g_strfreev (e->case_components);
1521 matchlet_match (TreeMatchlet *matchlet,
1531 e = enumerator_new (root, matchlet->path, !matchlet->match_case);
1535 file = enumerator_next (e);
1538 enumerator_free (e);
1542 if (matchlet->mimetype)
1543 attrs = G_FILE_ATTRIBUTE_STANDARD_TYPE ","
1544 G_FILE_ATTRIBUTE_ACCESS_CAN_EXECUTE ","
1545 G_FILE_ATTRIBUTE_STANDARD_CONTENT_TYPE;
1547 attrs = G_FILE_ATTRIBUTE_STANDARD_TYPE ","
1548 G_FILE_ATTRIBUTE_ACCESS_CAN_EXECUTE;
1549 info = g_file_query_info (file,
1551 G_FILE_QUERY_INFO_NONE,
1558 if (matchlet->type != G_FILE_TYPE_UNKNOWN &&
1559 g_file_info_get_file_type (info) != matchlet->type)
1562 if (matchlet->executable &&
1563 !g_file_info_get_attribute_boolean (info, G_FILE_ATTRIBUTE_ACCESS_CAN_EXECUTE))
1569 if (result && matchlet->non_empty)
1571 GFileEnumerator *child_enum;
1572 GFileInfo *child_info;
1574 child_enum = g_file_enumerate_children (file,
1575 G_FILE_ATTRIBUTE_STANDARD_NAME,
1576 G_FILE_QUERY_INFO_NONE,
1582 child_info = g_file_enumerator_next_file (child_enum, NULL, NULL);
1584 g_object_unref (child_info);
1587 g_object_unref (child_enum);
1593 if (result && matchlet->mimetype)
1595 if (strcmp (matchlet->mimetype, g_file_info_get_content_type (info)) != 0)
1599 g_object_unref (info);
1600 g_object_unref (file);
1604 enumerator_free (e);
1606 if (!matchlet->matches)
1609 for (l = matchlet->matches; l; l = l->next)
1611 TreeMatchlet *submatchlet;
1613 submatchlet = l->data;
1614 if (matchlet_match (submatchlet, root))
1622 match_match (TreeMatch *match,
1628 for (l = match->matches; l; l = l->next)
1630 TreeMatchlet *matchlet = l->data;
1631 if (matchlet_match (matchlet, root))
1633 g_ptr_array_add (types, g_strdup (match->contenttype));
1640 * g_content_type_guess_for_tree:
1641 * @root: the root of the tree to guess a type for
1643 * Tries to guess the type of the tree with root @root, by
1644 * looking at the files it contains. The result is an array
1645 * of content types, with the best guess coming first.
1647 * The types returned all have the form x-content/foo, e.g.
1648 * x-content/audio-cdda (for audio CDs) or x-content/image-dcf
1649 * (for a camera memory card). See the <ulink url="http://www.freedesktop.org/wiki/Specifications/shared-mime-info-spec">shared-mime-info</ulink>
1650 * specification for more on x-content types.
1652 * This function is useful in the implementation of
1653 * g_mount_guess_content_type().
1655 * Returns: (transfer full) (array zero-terminated=1): an %NULL-terminated
1656 * array of zero or more content types, or %NULL. Free with g_strfreev()
1661 g_content_type_guess_for_tree (GFile *root)
1666 types = g_ptr_array_new ();
1668 G_LOCK (gio_treemagic);
1671 for (l = tree_matches; l; l = l->next)
1673 TreeMatch *match = l->data;
1674 match_match (match, root, types);
1677 G_UNLOCK (gio_treemagic);
1679 g_ptr_array_add (types, NULL);
1681 return (gchar **)g_ptr_array_free (types, FALSE);
1684 #endif /* Unix version */