mirror of
https://gitlab.gnome.org/GNOME/glib.git
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610 lines
16 KiB
Objective-C
610 lines
16 KiB
Objective-C
/* GIO - GLib Input, Output and Streaming Library
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*
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* Copyright (C) 2014 Patrick Griffis
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "config.h"
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#include "gcontenttype.h"
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#include "gcontenttypeprivate.h"
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#include "gicon.h"
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#include "gthemedicon.h"
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#include <CoreServices/CoreServices.h>
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#define XDG_PREFIX _gio_xdg
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#include "xdgmime/xdgmime.h"
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/* We lock this mutex whenever we modify global state in this module. */
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G_LOCK_DEFINE_STATIC (gio_xdgmime);
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/*< internal >
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* create_cfstring_from_cstr:
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* @cstr: a #gchar
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*
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* Converts a cstr to a utf8 cfstring
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* It must be CFReleased()'d.
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*
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*/
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static CFStringRef
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create_cfstring_from_cstr (const gchar *cstr)
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{
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return CFStringCreateWithCString (NULL, cstr, kCFStringEncodingUTF8);
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}
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/*< internal >
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* create_cstr_from_cfstring:
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* @str: a #CFStringRef
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*
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* Converts a cfstring to a utf8 cstring.
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* The incoming cfstring is released for you.
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* The returned string must be g_free()'d.
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*
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*/
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static gchar *
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create_cstr_from_cfstring (CFStringRef str)
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{
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CFIndex length;
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CFIndex maxlen;
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gchar *buffer;
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Boolean success;
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g_return_val_if_fail (str != NULL, NULL);
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length = CFStringGetLength (str);
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maxlen = CFStringGetMaximumSizeForEncoding (length, kCFStringEncodingUTF8);
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buffer = g_malloc (maxlen + 1);
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success = CFStringGetCString (str, (char *) buffer, maxlen,
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kCFStringEncodingUTF8);
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CFRelease (str);
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if (success)
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return buffer;
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else
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{
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g_free (buffer);
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return NULL;
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}
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}
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/*< internal >
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* create_cstr_from_cfstring_with_fallback:
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* @str: a #CFStringRef
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* @fallback: a #gchar
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*
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* Tries to convert a cfstring to a utf8 cstring.
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* If @str is NULL or conversion fails @fallback is returned.
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* The incoming cfstring is released for you.
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* The returned string must be g_free()'d.
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*
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*/
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static gchar *
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create_cstr_from_cfstring_with_fallback (CFStringRef str,
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const gchar *fallback)
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{
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gchar *cstr = NULL;
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if (str)
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cstr = create_cstr_from_cfstring (str);
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if (!cstr)
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return g_strdup (fallback);
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return cstr;
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}
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/*< private >*/
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void
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g_content_type_set_mime_dirs_impl (const gchar * const *dirs)
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{
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/* noop on macOS */
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}
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/*< private >*/
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const gchar * const *
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g_content_type_get_mime_dirs_impl (void)
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{
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const gchar * const *mime_dirs = { NULL };
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return mime_dirs;
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}
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gboolean
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g_content_type_equals_impl (const gchar *type1,
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const gchar *type2)
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{
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CFStringRef str1, str2;
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gboolean ret;
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g_return_val_if_fail (type1 != NULL, FALSE);
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g_return_val_if_fail (type2 != NULL, FALSE);
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if (g_ascii_strcasecmp (type1, type2) == 0)
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return TRUE;
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str1 = create_cfstring_from_cstr (type1);
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str2 = create_cfstring_from_cstr (type2);
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ret = UTTypeEqual (str1, str2);
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CFRelease (str1);
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CFRelease (str2);
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return ret;
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}
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gboolean
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g_content_type_is_a_impl (const gchar *ctype,
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const gchar *csupertype)
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{
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CFStringRef type, supertype;
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gboolean ret;
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g_return_val_if_fail (ctype != NULL, FALSE);
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g_return_val_if_fail (csupertype != NULL, FALSE);
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type = create_cfstring_from_cstr (ctype);
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supertype = create_cfstring_from_cstr (csupertype);
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ret = UTTypeConformsTo (type, supertype);
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CFRelease (type);
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CFRelease (supertype);
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return ret;
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}
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gboolean
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g_content_type_is_mime_type_impl (const gchar *type,
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const gchar *mime_type)
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{
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gchar *content_type;
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gboolean ret;
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g_return_val_if_fail (type != NULL, FALSE);
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g_return_val_if_fail (mime_type != NULL, FALSE);
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content_type = g_content_type_from_mime_type (mime_type);
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ret = g_content_type_is_a (type, content_type);
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g_free (content_type);
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return ret;
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}
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gboolean
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g_content_type_is_unknown_impl (const gchar *type)
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{
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g_return_val_if_fail (type != NULL, FALSE);
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/* Should dynamic types be considered "unknown"? */
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if (g_str_has_prefix (type, "dyn."))
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return TRUE;
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/* application/octet-stream */
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else if (g_strcmp0 (type, "public.data") == 0)
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return TRUE;
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return FALSE;
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}
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gchar *
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g_content_type_get_description_impl (const gchar *type)
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{
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CFStringRef str;
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CFStringRef desc_str;
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g_return_val_if_fail (type != NULL, NULL);
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str = create_cfstring_from_cstr (type);
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desc_str = UTTypeCopyDescription (str);
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CFRelease (str);
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return create_cstr_from_cfstring_with_fallback (desc_str, "unknown");
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}
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/* <internal>
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* _get_generic_icon_name_from_mime_type
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*
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* This function produces a generic icon name from a @mime_type.
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* If no generic icon name is found in the xdg mime database, the
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* generic icon name is constructed.
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*
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* Background:
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* generic-icon elements specify the icon to use as a generic icon for this
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* particular mime-type, given by the name attribute. This is used if there
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* is no specific icon (see icon for how these are found). These are used
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* for categories of similar types (like spreadsheets or archives) that can
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* use a common icon. The Icon Naming Specification lists a set of such
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* icon names. If this element is not specified then the mimetype is used
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* to generate the generic icon by using the top-level media type
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* (e.g. "video" in "video/ogg") and appending "-x-generic"
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* (i.e. "video-x-generic" in the previous example).
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*
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* From: https://specifications.freedesktop.org/shared-mime-info-spec/shared-mime-info-spec-0.18.html
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*/
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static gchar *
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_get_generic_icon_name_from_mime_type (const gchar *mime_type)
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{
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const gchar *xdg_icon_name;
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gchar *icon_name;
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G_LOCK (gio_xdgmime);
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xdg_icon_name = xdg_mime_get_generic_icon (mime_type);
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G_UNLOCK (gio_xdgmime);
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if (xdg_icon_name == NULL)
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{
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const char *p;
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const char *suffix = "-x-generic";
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gsize prefix_len;
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p = strchr (mime_type, '/');
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if (p == NULL)
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prefix_len = strlen (mime_type);
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else
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prefix_len = p - mime_type;
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icon_name = g_malloc (prefix_len + strlen (suffix) + 1);
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memcpy (icon_name, mime_type, prefix_len);
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memcpy (icon_name + prefix_len, suffix, strlen (suffix));
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icon_name[prefix_len + strlen (suffix)] = 0;
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}
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else
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{
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icon_name = g_strdup (xdg_icon_name);
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}
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return icon_name;
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}
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static GIcon *
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g_content_type_get_icon_internal (const gchar *uti,
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gboolean symbolic)
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{
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char *mimetype_icon;
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char *mime_type;
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char *generic_mimetype_icon = NULL;
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char *q;
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char *icon_names[6];
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int n = 0;
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GIcon *themed_icon;
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const char *xdg_icon;
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int i;
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g_return_val_if_fail (uti != NULL, NULL);
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mime_type = g_content_type_get_mime_type (uti);
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G_LOCK (gio_xdgmime);
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xdg_icon = xdg_mime_get_icon (mime_type);
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G_UNLOCK (gio_xdgmime);
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if (xdg_icon)
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icon_names[n++] = g_strdup (xdg_icon);
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mimetype_icon = g_strdup (mime_type);
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while ((q = strchr (mimetype_icon, '/')) != NULL)
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*q = '-';
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icon_names[n++] = mimetype_icon;
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generic_mimetype_icon = _get_generic_icon_name_from_mime_type (mime_type);
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if (generic_mimetype_icon)
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icon_names[n++] = generic_mimetype_icon;
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if (symbolic)
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{
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for (i = 0; i < n; i++)
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{
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icon_names[n + i] = icon_names[i];
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icon_names[i] = g_strconcat (icon_names[i], "-symbolic", NULL);
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}
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n += n;
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}
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themed_icon = g_themed_icon_new_from_names (icon_names, n);
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for (i = 0; i < n; i++)
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g_free (icon_names[i]);
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g_free(mime_type);
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return themed_icon;
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}
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GIcon *
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g_content_type_get_icon_impl (const gchar *type)
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{
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return g_content_type_get_icon_internal (type, FALSE);
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}
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GIcon *
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g_content_type_get_symbolic_icon_impl (const gchar *type)
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{
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return g_content_type_get_icon_internal (type, TRUE);
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}
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gchar *
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g_content_type_get_generic_icon_name_impl (const gchar *type)
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{
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return NULL;
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}
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gboolean
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g_content_type_can_be_executable_impl (const gchar *type)
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{
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CFStringRef uti;
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gboolean ret = FALSE;
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g_return_val_if_fail (type != NULL, FALSE);
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uti = create_cfstring_from_cstr (type);
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if (UTTypeConformsTo (uti, kUTTypeApplication))
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ret = TRUE;
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else if (UTTypeConformsTo (uti, CFSTR("public.executable")))
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ret = TRUE;
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else if (UTTypeConformsTo (uti, CFSTR("public.script")))
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ret = TRUE;
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/* Our tests assert that all text can be executable... */
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else if (UTTypeConformsTo (uti, CFSTR("public.text")))
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ret = TRUE;
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CFRelease (uti);
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return ret;
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}
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gchar *
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g_content_type_from_mime_type_impl (const gchar *mime_type)
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{
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CFStringRef mime_str;
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CFStringRef uti_str;
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g_return_val_if_fail (mime_type != NULL, NULL);
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/* Their api does not handle globs but they are common. */
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if (g_str_has_suffix (mime_type, "*"))
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{
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if (g_str_has_prefix (mime_type, "audio"))
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return g_strdup ("public.audio");
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if (g_str_has_prefix (mime_type, "image"))
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return g_strdup ("public.image");
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if (g_str_has_prefix (mime_type, "text"))
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return g_strdup ("public.text");
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if (g_str_has_prefix (mime_type, "video"))
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return g_strdup ("public.movie");
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}
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/* Some exceptions are needed for gdk-pixbuf.
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* This list is not exhaustive.
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*/
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if (g_str_has_prefix (mime_type, "image"))
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{
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if (g_str_has_suffix (mime_type, "x-icns"))
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return g_strdup ("com.apple.icns");
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if (g_str_has_suffix (mime_type, "x-tga"))
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return g_strdup ("com.truevision.tga-image");
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if (g_str_has_suffix (mime_type, "x-ico"))
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return g_strdup ("com.microsoft.ico");
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}
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/* These are also not supported...
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* Used in glocalfileinfo.c
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*/
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if (g_str_has_prefix (mime_type, "inode"))
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{
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if (g_str_has_suffix (mime_type, "directory"))
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return g_strdup ("public.folder");
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if (g_str_has_suffix (mime_type, "symlink"))
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return g_strdup ("public.symlink");
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}
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/* This is correct according to the Apple docs:
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https://developer.apple.com/library/content/documentation/Miscellaneous/Reference/UTIRef/Articles/System-DeclaredUniformTypeIdentifiers.html
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*/
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if (strcmp (mime_type, "text/plain") == 0)
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return g_strdup ("public.text");
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/* I don’t know of an appropriate equivalent for application/x-zerosize, but
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* historically GLib has returned public.text for zero-sized files, so let’s
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* continue doing that. */
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if (strcmp (mime_type, "application/x-zerosize") == 0)
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return g_strdup ("public.text");
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/* Non standard type */
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if (strcmp (mime_type, "application/x-executable") == 0)
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return g_strdup ("public.executable");
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mime_str = create_cfstring_from_cstr (mime_type);
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uti_str = UTTypeCreatePreferredIdentifierForTag (kUTTagClassMIMEType, mime_str, NULL);
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CFRelease (mime_str);
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return create_cstr_from_cfstring_with_fallback (uti_str, "public.data");
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}
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gchar *
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g_content_type_get_mime_type_impl (const gchar *type)
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{
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CFStringRef uti_str;
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CFStringRef mime_str;
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g_return_val_if_fail (type != NULL, NULL);
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/* We must match the additions above
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* so conversions back and forth work.
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*/
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if (g_str_has_prefix (type, "public"))
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{
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if (g_str_has_suffix (type, ".image"))
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return g_strdup ("image/*");
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if (g_str_has_suffix (type, ".movie"))
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return g_strdup ("video/*");
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if (g_str_has_suffix (type, ".text"))
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return g_strdup ("text/*");
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if (g_str_has_suffix (type, ".audio"))
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return g_strdup ("audio/*");
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if (g_str_has_suffix (type, ".folder"))
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return g_strdup ("inode/directory");
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if (g_str_has_suffix (type, ".symlink"))
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return g_strdup ("inode/symlink");
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if (g_str_has_suffix (type, ".executable"))
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return g_strdup ("application/x-executable");
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}
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uti_str = create_cfstring_from_cstr (type);
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mime_str = UTTypeCopyPreferredTagWithClass(uti_str, kUTTagClassMIMEType);
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CFRelease (uti_str);
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return create_cstr_from_cfstring_with_fallback (mime_str, "application/octet-stream");
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}
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static gboolean
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looks_like_text (const guchar *data,
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gsize data_size)
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{
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gsize i;
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guchar c;
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for (i = 0; i < data_size; i++)
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{
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c = data[i];
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if (g_ascii_iscntrl (c) && !g_ascii_isspace (c) && c != '\b')
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return FALSE;
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}
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return TRUE;
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}
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gchar *
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g_content_type_guess_impl (const gchar *filename,
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const guchar *data,
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gsize data_size,
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gboolean *result_uncertain)
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{
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CFStringRef uti = NULL;
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gchar *cextension;
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CFStringRef extension;
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int uncertain = -1;
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g_return_val_if_fail (data_size != (gsize) -1, NULL);
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if (filename && *filename)
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{
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gchar *basename = g_path_get_basename (filename);
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gchar *dirname = g_path_get_dirname (filename);
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gsize i = strlen (filename);
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if (filename[i - 1] == '/')
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{
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if (g_strcmp0 (dirname, "/Volumes") == 0)
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{
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uti = CFStringCreateCopy (NULL, kUTTypeVolume);
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}
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else if ((cextension = strrchr (basename, '.')) != NULL)
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{
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cextension++;
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extension = create_cfstring_from_cstr (cextension);
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uti = UTTypeCreatePreferredIdentifierForTag (kUTTagClassFilenameExtension,
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extension, NULL);
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CFRelease (extension);
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if (CFStringHasPrefix (uti, CFSTR ("dyn.")))
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{
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CFRelease (uti);
|
||
uti = CFStringCreateCopy (NULL, kUTTypeFolder);
|
||
uncertain = TRUE;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
uti = CFStringCreateCopy (NULL, kUTTypeFolder);
|
||
uncertain = TRUE; /* Matches Unix backend */
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* GTK needs this... */
|
||
if (g_str_has_suffix (basename, ".ui"))
|
||
{
|
||
uti = CFStringCreateCopy (NULL, kUTTypeXML);
|
||
}
|
||
else if (g_str_has_suffix (basename, ".txt"))
|
||
{
|
||
uti = CFStringCreateCopy (NULL, CFSTR ("public.text"));
|
||
}
|
||
else if ((cextension = strrchr (basename, '.')) != NULL)
|
||
{
|
||
cextension++;
|
||
extension = create_cfstring_from_cstr (cextension);
|
||
uti = UTTypeCreatePreferredIdentifierForTag (kUTTagClassFilenameExtension,
|
||
extension, NULL);
|
||
CFRelease (extension);
|
||
}
|
||
g_free (basename);
|
||
g_free (dirname);
|
||
}
|
||
}
|
||
if (data && (!filename || !uti ||
|
||
CFStringCompare (uti, CFSTR ("public.data"), 0) == kCFCompareEqualTo))
|
||
{
|
||
const char *sniffed_mimetype;
|
||
G_LOCK (gio_xdgmime);
|
||
sniffed_mimetype = xdg_mime_get_mime_type_for_data (data, data_size, NULL);
|
||
G_UNLOCK (gio_xdgmime);
|
||
if (sniffed_mimetype != XDG_MIME_TYPE_UNKNOWN)
|
||
{
|
||
gchar *uti_str = g_content_type_from_mime_type (sniffed_mimetype);
|
||
uti = create_cfstring_from_cstr (uti_str);
|
||
g_free (uti_str);
|
||
}
|
||
if (!uti && looks_like_text (data, data_size))
|
||
{
|
||
if (g_str_has_prefix ((const gchar*)data, "#!/"))
|
||
uti = CFStringCreateCopy (NULL, CFSTR ("public.script"));
|
||
else
|
||
uti = CFStringCreateCopy (NULL, CFSTR ("public.text"));
|
||
}
|
||
}
|
||
|
||
if (!uti)
|
||
{
|
||
/* Generic data type */
|
||
uti = CFStringCreateCopy (NULL, CFSTR ("public.data"));
|
||
if (result_uncertain)
|
||
*result_uncertain = TRUE;
|
||
}
|
||
else if (result_uncertain)
|
||
{
|
||
*result_uncertain = uncertain == -1 ? FALSE : uncertain;
|
||
}
|
||
|
||
return create_cstr_from_cfstring (uti);
|
||
}
|
||
|
||
GList *
|
||
g_content_types_get_registered_impl (void)
|
||
{
|
||
/* TODO: UTTypeCreateAllIdentifiersForTag? */
|
||
return NULL;
|
||
}
|
||
|
||
gchar **
|
||
g_content_type_guess_for_tree_impl (GFile *root)
|
||
{
|
||
return NULL;
|
||
}
|