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Sub-directories inside gio/ already processed in a previous commit: - fam/ - gdbus-2.0/ (which contains only codegen/) - gvdb/ - inotify/ - tests/ - win32/ - xdgmime/ Other sub-directories inside gio/: - completion/: no license headers - kqueue/: not LGPL, BSD-style license https://bugzilla.gnome.org/show_bug.cgi?id=776504
683 lines
18 KiB
C
683 lines
18 KiB
C
/* GIO - GLib Input, Output and Streaming Library
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*
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* Copyright (C) 2006-2007 Red Hat, Inc.
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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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* Author: Alexander Larsson <alexl@redhat.com>
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <string.h>
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#include "gicon.h"
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#include "gthemedicon.h"
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#include "gfileicon.h"
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#include "gemblemedicon.h"
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#include "gbytesicon.h"
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#include "gfile.h"
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#include "gioerror.h"
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#include "gioenumtypes.h"
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#include "gvfs.h"
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#include "glibintl.h"
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/* There versioning of this is implicit, version 1 would be ".1 " */
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#define G_ICON_SERIALIZATION_MAGIC0 ". "
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/**
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* SECTION:gicon
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* @short_description: Interface for icons
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* @include: gio/gio.h
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*
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* #GIcon is a very minimal interface for icons. It provides functions
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* for checking the equality of two icons, hashing of icons and
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* serializing an icon to and from strings.
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*
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* #GIcon does not provide the actual pixmap for the icon as this is out
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* of GIO's scope, however implementations of #GIcon may contain the name
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* of an icon (see #GThemedIcon), or the path to an icon (see #GLoadableIcon).
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*
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* To obtain a hash of a #GIcon, see g_icon_hash().
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*
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* To check if two #GIcons are equal, see g_icon_equal().
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*
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* For serializing a #GIcon, use g_icon_serialize() and
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* g_icon_deserialize().
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*
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* If you want to consume #GIcon (for example, in a toolkit) you must
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* be prepared to handle at least the three following cases:
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* #GLoadableIcon, #GThemedIcon and #GEmblemedIcon. It may also make
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* sense to have fast-paths for other cases (like handling #GdkPixbuf
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* directly, for example) but all compliant #GIcon implementations
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* outside of GIO must implement #GLoadableIcon.
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*
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* If your application or library provides one or more #GIcon
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* implementations you need to ensure that your new implementation also
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* implements #GLoadableIcon. Additionally, you must provide an
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* implementation of g_icon_serialize() that gives a result that is
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* understood by g_icon_deserialize(), yielding one of the built-in icon
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* types.
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**/
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typedef GIconIface GIconInterface;
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G_DEFINE_INTERFACE(GIcon, g_icon, G_TYPE_OBJECT)
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static void
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g_icon_default_init (GIconInterface *iface)
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{
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}
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/**
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* g_icon_hash:
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* @icon: (not nullable): #gconstpointer to an icon object.
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*
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* Gets a hash for an icon.
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*
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* Virtual: hash
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* Returns: a #guint containing a hash for the @icon, suitable for
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* use in a #GHashTable or similar data structure.
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**/
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guint
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g_icon_hash (gconstpointer icon)
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{
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GIconIface *iface;
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g_return_val_if_fail (G_IS_ICON (icon), 0);
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iface = G_ICON_GET_IFACE (icon);
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return (* iface->hash) ((GIcon *)icon);
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}
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/**
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* g_icon_equal:
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* @icon1: (nullable): pointer to the first #GIcon.
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* @icon2: (nullable): pointer to the second #GIcon.
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*
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* Checks if two icons are equal.
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*
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* Returns: %TRUE if @icon1 is equal to @icon2. %FALSE otherwise.
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**/
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gboolean
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g_icon_equal (GIcon *icon1,
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GIcon *icon2)
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{
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GIconIface *iface;
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if (icon1 == NULL && icon2 == NULL)
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return TRUE;
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if (icon1 == NULL || icon2 == NULL)
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return FALSE;
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if (G_TYPE_FROM_INSTANCE (icon1) != G_TYPE_FROM_INSTANCE (icon2))
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return FALSE;
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iface = G_ICON_GET_IFACE (icon1);
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return (* iface->equal) (icon1, icon2);
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}
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static gboolean
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g_icon_to_string_tokenized (GIcon *icon, GString *s)
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{
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GPtrArray *tokens;
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gint version;
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GIconIface *icon_iface;
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int i;
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g_return_val_if_fail (icon != NULL, FALSE);
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g_return_val_if_fail (G_IS_ICON (icon), FALSE);
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icon_iface = G_ICON_GET_IFACE (icon);
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if (icon_iface->to_tokens == NULL)
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return FALSE;
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tokens = g_ptr_array_new ();
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if (!icon_iface->to_tokens (icon, tokens, &version))
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{
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g_ptr_array_free (tokens, TRUE);
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return FALSE;
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}
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/* format: TypeName[.Version] <token_0> .. <token_N-1>
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version 0 is implicit and can be omitted
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all the tokens are url escaped to ensure they have no spaces in them */
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g_string_append (s, g_type_name_from_instance ((GTypeInstance *)icon));
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if (version != 0)
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g_string_append_printf (s, ".%d", version);
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for (i = 0; i < tokens->len; i++)
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{
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char *token;
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token = g_ptr_array_index (tokens, i);
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g_string_append_c (s, ' ');
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/* We really only need to escape spaces here, so allow lots of otherwise reserved chars */
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g_string_append_uri_escaped (s, token,
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G_URI_RESERVED_CHARS_ALLOWED_IN_PATH, TRUE);
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g_free (token);
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}
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g_ptr_array_free (tokens, TRUE);
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return TRUE;
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}
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/**
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* g_icon_to_string:
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* @icon: a #GIcon.
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*
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* Generates a textual representation of @icon that can be used for
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* serialization such as when passing @icon to a different process or
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* saving it to persistent storage. Use g_icon_new_for_string() to
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* get @icon back from the returned string.
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*
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* The encoding of the returned string is proprietary to #GIcon except
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* in the following two cases
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*
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* - If @icon is a #GFileIcon, the returned string is a native path
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* (such as `/path/to/my icon.png`) without escaping
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* if the #GFile for @icon is a native file. If the file is not
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* native, the returned string is the result of g_file_get_uri()
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* (such as `sftp://path/to/my%20icon.png`).
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*
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* - If @icon is a #GThemedIcon with exactly one name, the encoding is
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* simply the name (such as `network-server`).
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*
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* Virtual: to_tokens
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* Returns: (nullable): An allocated NUL-terminated UTF8 string or
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* %NULL if @icon can't be serialized. Use g_free() to free.
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*
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* Since: 2.20
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*/
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gchar *
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g_icon_to_string (GIcon *icon)
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{
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gchar *ret;
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g_return_val_if_fail (icon != NULL, NULL);
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g_return_val_if_fail (G_IS_ICON (icon), NULL);
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ret = NULL;
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if (G_IS_FILE_ICON (icon))
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{
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GFile *file;
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file = g_file_icon_get_file (G_FILE_ICON (icon));
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if (g_file_is_native (file))
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{
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ret = g_file_get_path (file);
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if (!g_utf8_validate (ret, -1, NULL))
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{
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g_free (ret);
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ret = NULL;
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}
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}
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else
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ret = g_file_get_uri (file);
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}
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else if (G_IS_THEMED_ICON (icon))
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{
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const char * const *names;
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names = g_themed_icon_get_names (G_THEMED_ICON (icon));
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if (names != NULL &&
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names[0] != NULL &&
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names[0][0] != '.' && /* Allowing icons starting with dot would break G_ICON_SERIALIZATION_MAGIC0 */
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g_utf8_validate (names[0], -1, NULL) && /* Only return utf8 strings */
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names[1] == NULL)
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ret = g_strdup (names[0]);
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}
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if (ret == NULL)
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{
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GString *s;
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s = g_string_new (G_ICON_SERIALIZATION_MAGIC0);
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if (g_icon_to_string_tokenized (icon, s))
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ret = g_string_free (s, FALSE);
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else
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g_string_free (s, TRUE);
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}
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return ret;
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}
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static GIcon *
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g_icon_new_from_tokens (char **tokens,
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GError **error)
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{
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GIcon *icon;
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char *typename, *version_str;
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GType type;
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gpointer klass;
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GIconIface *icon_iface;
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gint version;
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char *endp;
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int num_tokens;
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int i;
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icon = NULL;
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klass = NULL;
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num_tokens = g_strv_length (tokens);
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if (num_tokens < 1)
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{
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g_set_error (error,
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G_IO_ERROR,
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G_IO_ERROR_INVALID_ARGUMENT,
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_("Wrong number of tokens (%d)"),
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num_tokens);
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goto out;
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}
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typename = tokens[0];
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version_str = strchr (typename, '.');
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if (version_str)
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{
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*version_str = 0;
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version_str += 1;
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}
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type = g_type_from_name (tokens[0]);
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if (type == 0)
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{
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g_set_error (error,
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G_IO_ERROR,
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G_IO_ERROR_INVALID_ARGUMENT,
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_("No type for class name %s"),
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tokens[0]);
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goto out;
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}
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if (!g_type_is_a (type, G_TYPE_ICON))
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{
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g_set_error (error,
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G_IO_ERROR,
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G_IO_ERROR_INVALID_ARGUMENT,
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_("Type %s does not implement the GIcon interface"),
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tokens[0]);
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goto out;
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}
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klass = g_type_class_ref (type);
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if (klass == NULL)
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{
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g_set_error (error,
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G_IO_ERROR,
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G_IO_ERROR_INVALID_ARGUMENT,
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_("Type %s is not classed"),
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tokens[0]);
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goto out;
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}
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version = 0;
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if (version_str)
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{
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version = strtol (version_str, &endp, 10);
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if (endp == NULL || *endp != '\0')
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{
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g_set_error (error,
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G_IO_ERROR,
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G_IO_ERROR_INVALID_ARGUMENT,
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_("Malformed version number: %s"),
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version_str);
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goto out;
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}
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}
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icon_iface = g_type_interface_peek (klass, G_TYPE_ICON);
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g_assert (icon_iface != NULL);
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if (icon_iface->from_tokens == NULL)
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{
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g_set_error (error,
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G_IO_ERROR,
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G_IO_ERROR_INVALID_ARGUMENT,
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_("Type %s does not implement from_tokens() on the GIcon interface"),
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tokens[0]);
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goto out;
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}
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for (i = 1; i < num_tokens; i++)
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{
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char *escaped;
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escaped = tokens[i];
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tokens[i] = g_uri_unescape_string (escaped, NULL);
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g_free (escaped);
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}
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icon = icon_iface->from_tokens (tokens + 1, num_tokens - 1, version, error);
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out:
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if (klass != NULL)
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g_type_class_unref (klass);
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return icon;
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}
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static void
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ensure_builtin_icon_types (void)
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{
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g_type_ensure (G_TYPE_THEMED_ICON);
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g_type_ensure (G_TYPE_FILE_ICON);
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g_type_ensure (G_TYPE_EMBLEMED_ICON);
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g_type_ensure (G_TYPE_EMBLEM);
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}
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/* handles the 'simple' cases: GFileIcon and GThemedIcon */
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static GIcon *
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g_icon_new_for_string_simple (const gchar *str)
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{
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gchar *scheme;
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GIcon *icon;
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if (str[0] == '.')
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return NULL;
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/* handle special GFileIcon and GThemedIcon cases */
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scheme = g_uri_parse_scheme (str);
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if (scheme != NULL || str[0] == '/' || str[0] == G_DIR_SEPARATOR)
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{
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GFile *location;
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location = g_file_new_for_commandline_arg (str);
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icon = g_file_icon_new (location);
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g_object_unref (location);
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}
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else
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icon = g_themed_icon_new (str);
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g_free (scheme);
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return icon;
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}
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/**
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* g_icon_new_for_string:
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* @str: A string obtained via g_icon_to_string().
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* @error: Return location for error.
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*
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* Generate a #GIcon instance from @str. This function can fail if
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* @str is not valid - see g_icon_to_string() for discussion.
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*
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* If your application or library provides one or more #GIcon
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* implementations you need to ensure that each #GType is registered
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* with the type system prior to calling g_icon_new_for_string().
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*
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* Returns: (transfer full): An object implementing the #GIcon
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* interface or %NULL if @error is set.
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*
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* Since: 2.20
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**/
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GIcon *
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g_icon_new_for_string (const gchar *str,
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GError **error)
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{
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GIcon *icon = NULL;
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g_return_val_if_fail (str != NULL, NULL);
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icon = g_icon_new_for_string_simple (str);
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if (icon)
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return icon;
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ensure_builtin_icon_types ();
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if (g_str_has_prefix (str, G_ICON_SERIALIZATION_MAGIC0))
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{
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gchar **tokens;
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/* handle tokenized encoding */
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tokens = g_strsplit (str + sizeof (G_ICON_SERIALIZATION_MAGIC0) - 1, " ", 0);
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icon = g_icon_new_from_tokens (tokens, error);
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g_strfreev (tokens);
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}
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else
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g_set_error_literal (error,
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G_IO_ERROR,
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G_IO_ERROR_INVALID_ARGUMENT,
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_("Can’t handle the supplied version of the icon encoding"));
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return icon;
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}
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static GEmblem *
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g_icon_deserialize_emblem (GVariant *value)
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{
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GVariant *emblem_metadata;
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GVariant *emblem_data;
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const gchar *origin_nick;
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GIcon *emblem_icon;
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GEmblem *emblem;
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g_variant_get (value, "(v@a{sv})", &emblem_data, &emblem_metadata);
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emblem = NULL;
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emblem_icon = g_icon_deserialize (emblem_data);
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if (emblem_icon != NULL)
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{
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/* Check if we should create it with an origin. */
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if (g_variant_lookup (emblem_metadata, "origin", "&s", &origin_nick))
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{
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GEnumClass *origin_class;
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GEnumValue *origin_value;
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origin_class = g_type_class_ref (G_TYPE_EMBLEM_ORIGIN);
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origin_value = g_enum_get_value_by_nick (origin_class, origin_nick);
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if (origin_value)
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emblem = g_emblem_new_with_origin (emblem_icon, origin_value->value);
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g_type_class_unref (origin_class);
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}
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/* We didn't create it with an origin, so do it without. */
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if (emblem == NULL)
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emblem = g_emblem_new (emblem_icon);
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g_object_unref (emblem_icon);
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}
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g_variant_unref (emblem_metadata);
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g_variant_unref (emblem_data);
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return emblem;
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}
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static GIcon *
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g_icon_deserialize_emblemed (GVariant *value)
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{
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GVariantIter *emblems;
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GVariant *icon_data;
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GIcon *main_icon;
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GIcon *icon;
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g_variant_get (value, "(va(va{sv}))", &icon_data, &emblems);
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main_icon = g_icon_deserialize (icon_data);
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if (main_icon)
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{
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GVariant *emblem_data;
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icon = g_emblemed_icon_new (main_icon, NULL);
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while ((emblem_data = g_variant_iter_next_value (emblems)))
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{
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GEmblem *emblem;
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emblem = g_icon_deserialize_emblem (emblem_data);
|
||
|
||
if (emblem)
|
||
{
|
||
g_emblemed_icon_add_emblem (G_EMBLEMED_ICON (icon), emblem);
|
||
g_object_unref (emblem);
|
||
}
|
||
|
||
g_variant_unref (emblem_data);
|
||
}
|
||
|
||
g_object_unref (main_icon);
|
||
}
|
||
else
|
||
icon = NULL;
|
||
|
||
g_variant_iter_free (emblems);
|
||
g_variant_unref (icon_data);
|
||
|
||
return icon;
|
||
}
|
||
|
||
/**
|
||
* g_icon_deserialize:
|
||
* @value: a #GVariant created with g_icon_serialize()
|
||
*
|
||
* Deserializes a #GIcon previously serialized using g_icon_serialize().
|
||
*
|
||
* Returns: (transfer full): a #GIcon, or %NULL when deserialization fails.
|
||
*
|
||
* Since: 2.38
|
||
*/
|
||
GIcon *
|
||
g_icon_deserialize (GVariant *value)
|
||
{
|
||
const gchar *tag;
|
||
GVariant *val;
|
||
GIcon *icon;
|
||
|
||
g_return_val_if_fail (value != NULL, NULL);
|
||
g_return_val_if_fail (g_variant_is_of_type (value, G_VARIANT_TYPE_STRING) ||
|
||
g_variant_is_of_type (value, G_VARIANT_TYPE ("(sv)")), NULL);
|
||
|
||
/* Handle some special cases directly so that people can hard-code
|
||
* stuff into GMenuModel xml files without resorting to using GVariant
|
||
* text format to describe one of the explicitly-tagged possibilities
|
||
* below.
|
||
*/
|
||
if (g_variant_is_of_type (value, G_VARIANT_TYPE_STRING))
|
||
return g_icon_new_for_string_simple (g_variant_get_string (value, NULL));
|
||
|
||
/* Otherwise, use the tagged union format */
|
||
g_variant_get (value, "(&sv)", &tag, &val);
|
||
|
||
icon = NULL;
|
||
|
||
if (g_str_equal (tag, "file") && g_variant_is_of_type (val, G_VARIANT_TYPE_STRING))
|
||
{
|
||
GFile *file;
|
||
|
||
file = g_file_new_for_commandline_arg (g_variant_get_string (val, NULL));
|
||
icon = g_file_icon_new (file);
|
||
g_object_unref (file);
|
||
}
|
||
else if (g_str_equal (tag, "themed") && g_variant_is_of_type (val, G_VARIANT_TYPE_STRING_ARRAY))
|
||
{
|
||
const gchar **names;
|
||
gsize size;
|
||
|
||
names = g_variant_get_strv (val, &size);
|
||
icon = g_themed_icon_new_from_names ((gchar **) names, size);
|
||
g_free (names);
|
||
}
|
||
else if (g_str_equal (tag, "bytes") && g_variant_is_of_type (val, G_VARIANT_TYPE_BYTESTRING))
|
||
{
|
||
GBytes *bytes;
|
||
|
||
bytes = g_variant_get_data_as_bytes (val);
|
||
icon = g_bytes_icon_new (bytes);
|
||
g_bytes_unref (bytes);
|
||
}
|
||
else if (g_str_equal (tag, "emblem") && g_variant_is_of_type (val, G_VARIANT_TYPE ("(va{sv})")))
|
||
{
|
||
GEmblem *emblem;
|
||
|
||
emblem = g_icon_deserialize_emblem (val);
|
||
if (emblem)
|
||
icon = G_ICON (emblem);
|
||
}
|
||
else if (g_str_equal (tag, "emblemed") && g_variant_is_of_type (val, G_VARIANT_TYPE ("(va(va{sv}))")))
|
||
{
|
||
icon = g_icon_deserialize_emblemed (val);
|
||
}
|
||
else if (g_str_equal (tag, "gvfs"))
|
||
{
|
||
GVfsClass *class;
|
||
GVfs *vfs;
|
||
|
||
vfs = g_vfs_get_default ();
|
||
class = G_VFS_GET_CLASS (vfs);
|
||
if (class->deserialize_icon)
|
||
icon = (* class->deserialize_icon) (vfs, val);
|
||
}
|
||
|
||
g_variant_unref (val);
|
||
|
||
return icon;
|
||
}
|
||
|
||
/**
|
||
* g_icon_serialize:
|
||
* @icon: a #GIcon
|
||
*
|
||
* Serializes a #GIcon into a #GVariant. An equivalent #GIcon can be retrieved
|
||
* back by calling g_icon_deserialize() on the returned value.
|
||
* As serialization will avoid using raw icon data when possible, it only
|
||
* makes sense to transfer the #GVariant between processes on the same machine,
|
||
* (as opposed to over the network), and within the same file system namespace.
|
||
*
|
||
* Returns: (transfer full): a #GVariant, or %NULL when serialization fails.
|
||
*
|
||
* Since: 2.38
|
||
*/
|
||
GVariant *
|
||
g_icon_serialize (GIcon *icon)
|
||
{
|
||
GIconInterface *iface;
|
||
GVariant *result;
|
||
|
||
iface = G_ICON_GET_IFACE (icon);
|
||
|
||
if (!iface->serialize)
|
||
{
|
||
g_critical ("g_icon_serialize() on icon type '%s' is not implemented", G_OBJECT_TYPE_NAME (icon));
|
||
return NULL;
|
||
}
|
||
|
||
result = (* iface->serialize) (icon);
|
||
|
||
if (result)
|
||
{
|
||
g_variant_take_ref (result);
|
||
|
||
if (!g_variant_is_of_type (result, G_VARIANT_TYPE ("(sv)")))
|
||
{
|
||
g_critical ("g_icon_serialize() on icon type '%s' returned GVariant of type '%s' but it must return "
|
||
"one with type '(sv)'", G_OBJECT_TYPE_NAME (icon), g_variant_get_type_string (result));
|
||
g_variant_unref (result);
|
||
result = NULL;
|
||
}
|
||
}
|
||
|
||
return result;
|
||
}
|