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glib2.0/gio/gappinfo.c

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/* GIO - GLib Input, Output and Streaming Library
*
* Copyright (C) 2006-2007 Red Hat, Inc.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
* Author: Alexander Larsson <alexl@redhat.com>
*/
#include "config.h"
#include "gappinfo.h"
#include "gappinfoprivate.h"
#include "gcontextspecificgroup.h"
#include "gtask.h"
#include "gcancellable.h"
#include "glibintl.h"
#include "gmarshal-internal.h"
#include <gioerror.h>
#include <gfile.h>
#ifdef G_OS_UNIX
#include "gdbusconnection.h"
#include "gdbusmessage.h"
#include "gportalsupport.h"
#include "gunixfdlist.h"
#include "gopenuriportal.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#endif
/**
* GAppInfo:
*
* Information about an installed application and methods to launch
* it (with file arguments).
* `GAppInfo` and `GAppLaunchContext` are used for describing and launching
* applications installed on the system.
*
* As of GLib 2.20, URIs will always be converted to POSIX paths
* (using [method@Gio.File.get_path]) when using [method@Gio.AppInfo.launch]
* even if the application requested an URI and not a POSIX path. For example
* for a desktop-file based application with Exec key `totem
* %U` and a single URI, `sftp://foo/file.avi`, then
* `/home/user/.gvfs/sftp on foo/file.avi` will be passed. This will
* only work if a set of suitable GIO extensions (such as GVfs 2.26
* compiled with FUSE support), is available and operational; if this
* is not the case, the URI will be passed unmodified to the application.
* Some URIs, such as `mailto:`, of course cannot be mapped to a POSIX
* path (in GVfs there's no FUSE mount for it); such URIs will be
* passed unmodified to the application.
*
* Specifically for GVfs 2.26 and later, the POSIX URI will be mapped
* back to the GIO URI in the [iface@Gio.File] constructors (since GVfs
* implements the GVfs extension point). As such, if the application
* needs to examine the URI, it needs to use [method@Gio.File.get_uri]
* or similar on [iface@Gio.File]. In other words, an application cannot
* assume that the URI passed to e.g. [func@Gio.File.new_for_commandline_arg]
* is equal to the result of [method@Gio.File.get_uri]. The following snippet
* illustrates this:
*
* ```c
* GFile *f;
* char *uri;
*
* file = g_file_new_for_commandline_arg (uri_from_commandline);
*
* uri = g_file_get_uri (file);
* strcmp (uri, uri_from_commandline) == 0;
* g_free (uri);
*
* if (g_file_has_uri_scheme (file, "cdda"))
* {
* // do something special with uri
* }
* g_object_unref (file);
* ```
*
* This code will work when both `cdda://sr0/Track 1.wav` and
* `/home/user/.gvfs/cdda on sr0/Track 1.wav` is passed to the
* application. It should be noted that it's generally not safe
* for applications to rely on the format of a particular URIs.
* Different launcher applications (e.g. file managers) may have
* different ideas of what a given URI means.
*/
struct _GAppLaunchContextPrivate {
char **envp;
};
typedef GAppInfoIface GAppInfoInterface;
G_DEFINE_INTERFACE (GAppInfo, g_app_info, G_TYPE_OBJECT)
static void
g_app_info_default_init (GAppInfoInterface *iface)
{
}
/**
* g_app_info_dup:
* @appinfo: a #GAppInfo.
*
* Creates a duplicate of a #GAppInfo.
*
* Returns: (transfer full): a duplicate of @appinfo.
**/
GAppInfo *
g_app_info_dup (GAppInfo *appinfo)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
iface = G_APP_INFO_GET_IFACE (appinfo);
return (* iface->dup) (appinfo);
}
/**
* g_app_info_equal:
* @appinfo1: the first #GAppInfo.
* @appinfo2: the second #GAppInfo.
*
* Checks if two #GAppInfos are equal.
*
* Note that the check *may not* compare each individual
* field, and only does an identity check. In case detecting changes in the
* contents is needed, program code must additionally compare relevant fields.
*
* Returns: %TRUE if @appinfo1 is equal to @appinfo2. %FALSE otherwise.
**/
gboolean
g_app_info_equal (GAppInfo *appinfo1,
GAppInfo *appinfo2)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo1), FALSE);
g_return_val_if_fail (G_IS_APP_INFO (appinfo2), FALSE);
if (G_TYPE_FROM_INSTANCE (appinfo1) != G_TYPE_FROM_INSTANCE (appinfo2))
return FALSE;
iface = G_APP_INFO_GET_IFACE (appinfo1);
return (* iface->equal) (appinfo1, appinfo2);
}
/**
* g_app_info_get_id:
* @appinfo: a #GAppInfo.
*
* Gets the ID of an application. An id is a string that
* identifies the application. The exact format of the id is
* platform dependent. For instance, on Unix this is the
* desktop file id from the xdg menu specification.
*
* Note that the returned ID may be %NULL, depending on how
* the @appinfo has been constructed.
*
* Returns: (nullable): a string containing the application's ID.
**/
const char *
g_app_info_get_id (GAppInfo *appinfo)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
iface = G_APP_INFO_GET_IFACE (appinfo);
return (* iface->get_id) (appinfo);
}
/**
* g_app_info_get_name:
* @appinfo: a #GAppInfo.
*
* Gets the installed name of the application.
*
* Returns: the name of the application for @appinfo.
**/
const char *
g_app_info_get_name (GAppInfo *appinfo)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
iface = G_APP_INFO_GET_IFACE (appinfo);
return (* iface->get_name) (appinfo);
}
/**
* g_app_info_get_display_name:
* @appinfo: a #GAppInfo.
*
* Gets the display name of the application. The display name is often more
* descriptive to the user than the name itself.
*
* Returns: the display name of the application for @appinfo, or the name if
* no display name is available.
*
* Since: 2.24
**/
const char *
g_app_info_get_display_name (GAppInfo *appinfo)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
iface = G_APP_INFO_GET_IFACE (appinfo);
if (iface->get_display_name == NULL)
return (* iface->get_name) (appinfo);
return (* iface->get_display_name) (appinfo);
}
/**
* g_app_info_get_description:
* @appinfo: a #GAppInfo.
*
* Gets a human-readable description of an installed application.
*
* Returns: (nullable): a string containing a description of the
* application @appinfo, or %NULL if none.
**/
const char *
g_app_info_get_description (GAppInfo *appinfo)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
iface = G_APP_INFO_GET_IFACE (appinfo);
return (* iface->get_description) (appinfo);
}
/**
* g_app_info_get_executable: (virtual get_executable)
* @appinfo: a #GAppInfo
*
* Gets the executable's name for the installed application.
*
* This is intended to be used for debugging or labelling what program is going
* to be run. To launch the executable, use g_app_info_launch() and related
* functions, rather than spawning the return value from this function.
*
* Returns: (type filename): a string containing the @appinfo's application
* binaries name
**/
const char *
g_app_info_get_executable (GAppInfo *appinfo)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
iface = G_APP_INFO_GET_IFACE (appinfo);
return (* iface->get_executable) (appinfo);
}
/**
* g_app_info_get_commandline: (virtual get_commandline)
* @appinfo: a #GAppInfo
*
* Gets the commandline with which the application will be
* started.
*
* Returns: (nullable) (type filename): a string containing the @appinfo's commandline,
* or %NULL if this information is not available
*
* Since: 2.20
**/
const char *
g_app_info_get_commandline (GAppInfo *appinfo)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
iface = G_APP_INFO_GET_IFACE (appinfo);
if (iface->get_commandline)
return (* iface->get_commandline) (appinfo);
return NULL;
}
/**
* g_app_info_set_as_default_for_type:
* @appinfo: a #GAppInfo.
* @content_type: the content type.
* @error: a #GError.
*
* Sets the application as the default handler for a given type.
*
* Returns: %TRUE on success, %FALSE on error.
**/
gboolean
g_app_info_set_as_default_for_type (GAppInfo *appinfo,
const char *content_type,
GError **error)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
g_return_val_if_fail (content_type != NULL, FALSE);
iface = G_APP_INFO_GET_IFACE (appinfo);
if (iface->set_as_default_for_type)
return (* iface->set_as_default_for_type) (appinfo, content_type, error);
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("Setting default applications not supported yet"));
return FALSE;
}
/**
* g_app_info_set_as_last_used_for_type:
* @appinfo: a #GAppInfo.
* @content_type: the content type.
* @error: a #GError.
*
* Sets the application as the last used application for a given type.
* This will make the application appear as first in the list returned
* by g_app_info_get_recommended_for_type(), regardless of the default
* application for that content type.
*
* Returns: %TRUE on success, %FALSE on error.
**/
gboolean
g_app_info_set_as_last_used_for_type (GAppInfo *appinfo,
const char *content_type,
GError **error)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
g_return_val_if_fail (content_type != NULL, FALSE);
iface = G_APP_INFO_GET_IFACE (appinfo);
if (iface->set_as_last_used_for_type)
return (* iface->set_as_last_used_for_type) (appinfo, content_type, error);
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("Setting application as last used for type not supported yet"));
return FALSE;
}
/**
* g_app_info_set_as_default_for_extension:
* @appinfo: a #GAppInfo.
* @extension: (type filename): a string containing the file extension
* (without the dot).
* @error: a #GError.
*
* Sets the application as the default handler for the given file extension.
*
* Returns: %TRUE on success, %FALSE on error.
**/
gboolean
g_app_info_set_as_default_for_extension (GAppInfo *appinfo,
const char *extension,
GError **error)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
g_return_val_if_fail (extension != NULL, FALSE);
iface = G_APP_INFO_GET_IFACE (appinfo);
if (iface->set_as_default_for_extension)
return (* iface->set_as_default_for_extension) (appinfo, extension, error);
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
"g_app_info_set_as_default_for_extension not supported yet");
return FALSE;
}
/**
* g_app_info_add_supports_type:
* @appinfo: a #GAppInfo.
* @content_type: a string.
* @error: a #GError.
*
* Adds a content type to the application information to indicate the
* application is capable of opening files with the given content type.
*
* Returns: %TRUE on success, %FALSE on error.
**/
gboolean
g_app_info_add_supports_type (GAppInfo *appinfo,
const char *content_type,
GError **error)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
g_return_val_if_fail (content_type != NULL, FALSE);
iface = G_APP_INFO_GET_IFACE (appinfo);
if (iface->add_supports_type)
return (* iface->add_supports_type) (appinfo, content_type, error);
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
"g_app_info_add_supports_type not supported yet");
return FALSE;
}
/**
* g_app_info_can_remove_supports_type:
* @appinfo: a #GAppInfo.
*
* Checks if a supported content type can be removed from an application.
*
* Returns: %TRUE if it is possible to remove supported
* content types from a given @appinfo, %FALSE if not.
**/
gboolean
g_app_info_can_remove_supports_type (GAppInfo *appinfo)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
iface = G_APP_INFO_GET_IFACE (appinfo);
if (iface->can_remove_supports_type)
return (* iface->can_remove_supports_type) (appinfo);
return FALSE;
}
/**
* g_app_info_remove_supports_type:
* @appinfo: a #GAppInfo.
* @content_type: a string.
* @error: a #GError.
*
* Removes a supported type from an application, if possible.
*
* Returns: %TRUE on success, %FALSE on error.
**/
gboolean
g_app_info_remove_supports_type (GAppInfo *appinfo,
const char *content_type,
GError **error)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
g_return_val_if_fail (content_type != NULL, FALSE);
iface = G_APP_INFO_GET_IFACE (appinfo);
if (iface->remove_supports_type)
return (* iface->remove_supports_type) (appinfo, content_type, error);
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_NOT_SUPPORTED,
"g_app_info_remove_supports_type not supported yet");
return FALSE;
}
/**
* g_app_info_get_supported_types:
* @appinfo: a #GAppInfo that can handle files
*
* Retrieves the list of content types that @app_info claims to support.
* If this information is not provided by the environment, this function
* will return %NULL.
* This function does not take in consideration associations added with
* g_app_info_add_supports_type(), but only those exported directly by
* the application.
*
* Returns: (transfer none) (array zero-terminated=1) (element-type utf8):
* a list of content types.
*
* Since: 2.34
*/
const char **
g_app_info_get_supported_types (GAppInfo *appinfo)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
iface = G_APP_INFO_GET_IFACE (appinfo);
if (iface->get_supported_types)
return iface->get_supported_types (appinfo);
else
return NULL;
}
/**
* g_app_info_get_icon:
* @appinfo: a #GAppInfo.
*
* Gets the icon for the application.
*
* Returns: (nullable) (transfer none): the default #GIcon for @appinfo or %NULL
* if there is no default icon.
**/
GIcon *
g_app_info_get_icon (GAppInfo *appinfo)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
iface = G_APP_INFO_GET_IFACE (appinfo);
return (* iface->get_icon) (appinfo);
}
/**
* g_app_info_launch:
* @appinfo: a #GAppInfo
* @files: (nullable) (element-type GFile): a #GList of #GFile objects
* @context: (nullable): a #GAppLaunchContext or %NULL
* @error: a #GError
*
* Launches the application. Passes @files to the launched application
* as arguments, using the optional @context to get information
* about the details of the launcher (like what screen it is on).
* On error, @error will be set accordingly.
*
* To launch the application without arguments pass a %NULL @files list.
*
* Note that even if the launch is successful the application launched
* can fail to start if it runs into problems during startup. There is
* no way to detect this.
*
* Some URIs can be changed when passed through a GFile (for instance
* unsupported URIs with strange formats like mailto:), so if you have
* a textual URI you want to pass in as argument, consider using
* g_app_info_launch_uris() instead.
*
* The launched application inherits the environment of the launching
* process, but it can be modified with g_app_launch_context_setenv()
* and g_app_launch_context_unsetenv().
*
* On UNIX, this function sets the `GIO_LAUNCHED_DESKTOP_FILE`
* environment variable with the path of the launched desktop file and
* `GIO_LAUNCHED_DESKTOP_FILE_PID` to the process id of the launched
* process. This can be used to ignore `GIO_LAUNCHED_DESKTOP_FILE`,
* should it be inherited by further processes. The `DISPLAY`,
* `XDG_ACTIVATION_TOKEN` and `DESKTOP_STARTUP_ID` environment
* variables are also set, based on information provided in @context.
*
* Returns: %TRUE on successful launch, %FALSE otherwise.
**/
gboolean
g_app_info_launch (GAppInfo *appinfo,
GList *files,
GAppLaunchContext *launch_context,
GError **error)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
iface = G_APP_INFO_GET_IFACE (appinfo);
return (* iface->launch) (appinfo, files, launch_context, error);
}
/**
* g_app_info_supports_uris:
* @appinfo: a #GAppInfo.
*
* Checks if the application supports reading files and directories from URIs.
*
* Returns: %TRUE if the @appinfo supports URIs.
**/
gboolean
g_app_info_supports_uris (GAppInfo *appinfo)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
iface = G_APP_INFO_GET_IFACE (appinfo);
return (* iface->supports_uris) (appinfo);
}
/**
* g_app_info_supports_files:
* @appinfo: a #GAppInfo.
*
* Checks if the application accepts files as arguments.
*
* Returns: %TRUE if the @appinfo supports files.
**/
gboolean
g_app_info_supports_files (GAppInfo *appinfo)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
iface = G_APP_INFO_GET_IFACE (appinfo);
return (* iface->supports_files) (appinfo);
}
/**
* g_app_info_launch_uris:
* @appinfo: a #GAppInfo
* @uris: (nullable) (element-type utf8): a #GList containing URIs to launch.
* @context: (nullable): a #GAppLaunchContext or %NULL
* @error: a #GError
*
* Launches the application. This passes the @uris to the launched application
* as arguments, using the optional @context to get information
* about the details of the launcher (like what screen it is on).
* On error, @error will be set accordingly. If the application only supports
* one URI per invocation as part of their command-line, multiple instances
* of the application will be spawned.
*
* To launch the application without arguments pass a %NULL @uris list.
*
* Note that even if the launch is successful the application launched
* can fail to start if it runs into problems during startup. There is
* no way to detect this.
*
* Returns: %TRUE on successful launch, %FALSE otherwise.
**/
gboolean
g_app_info_launch_uris (GAppInfo *appinfo,
GList *uris,
GAppLaunchContext *launch_context,
GError **error)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
iface = G_APP_INFO_GET_IFACE (appinfo);
return (* iface->launch_uris) (appinfo, uris, launch_context, error);
}
/**
* g_app_info_launch_uris_async:
* @appinfo: a #GAppInfo
* @uris: (nullable) (element-type utf8): a #GList containing URIs to launch.
* @context: (nullable): a #GAppLaunchContext or %NULL
* @cancellable: (nullable): a #GCancellable
* @callback: (nullable): a #GAsyncReadyCallback to call when the request is done
* @user_data: (nullable): data to pass to @callback
*
* Async version of g_app_info_launch_uris().
*
* The @callback is invoked immediately after the application launch, but it
* waits for activation in case of D-Bus–activated applications and also provides
* extended error information for sandboxed applications, see notes for
* g_app_info_launch_default_for_uri_async().
*
* Since: 2.60
**/
void
g_app_info_launch_uris_async (GAppInfo *appinfo,
GList *uris,
GAppLaunchContext *context,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GAppInfoIface *iface;
g_return_if_fail (G_IS_APP_INFO (appinfo));
g_return_if_fail (context == NULL || G_IS_APP_LAUNCH_CONTEXT (context));
g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
iface = G_APP_INFO_GET_IFACE (appinfo);
if (iface->launch_uris_async == NULL)
{
GTask *task;
task = g_task_new (appinfo, cancellable, callback, user_data);
g_task_set_source_tag (task, g_app_info_launch_uris_async);
g_task_return_new_error_literal (task, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
"Operation not supported for the current backend.");
g_object_unref (task);
return;
}
(* iface->launch_uris_async) (appinfo, uris, context, cancellable, callback, user_data);
}
/**
* g_app_info_launch_uris_finish:
* @appinfo: a #GAppInfo
* @result: a #GAsyncResult
* @error: (nullable): a #GError
*
* Finishes a g_app_info_launch_uris_async() operation.
*
* Returns: %TRUE on successful launch, %FALSE otherwise.
*
* Since: 2.60
*/
gboolean
g_app_info_launch_uris_finish (GAppInfo *appinfo,
GAsyncResult *result,
GError **error)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
iface = G_APP_INFO_GET_IFACE (appinfo);
if (iface->launch_uris_finish == NULL)
{
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
"Operation not supported for the current backend.");
return FALSE;
}
return (* iface->launch_uris_finish) (appinfo, result, error);
}
/**
* g_app_info_should_show:
* @appinfo: a #GAppInfo.
*
* Checks if the application info should be shown in menus that
* list available applications.
*
* Returns: %TRUE if the @appinfo should be shown, %FALSE otherwise.
**/
gboolean
g_app_info_should_show (GAppInfo *appinfo)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
iface = G_APP_INFO_GET_IFACE (appinfo);
return (* iface->should_show) (appinfo);
}
typedef struct {
char *content_type;
gboolean must_support_uris;
} DefaultForTypeData;
static void
default_for_type_data_free (DefaultForTypeData *data)
{
g_free (data->content_type);
g_free (data);
}
static void
get_default_for_type_thread (GTask *task,
gpointer object,
gpointer task_data,
GCancellable *cancellable)
{
DefaultForTypeData *data = task_data;
GAppInfo *info;
info = g_app_info_get_default_for_type (data->content_type,
data->must_support_uris);
if (!info)
{
g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_NOT_FOUND,
_("Failed to find default application for "
"content type ‘%s’"), data->content_type);
return;
}
g_task_return_pointer (task, g_steal_pointer (&info), g_object_unref);
}
/**
* g_app_info_get_default_for_type_async:
* @content_type: the content type to find a #GAppInfo for
* @must_support_uris: if %TRUE, the #GAppInfo is expected to
* support URIs
* @cancellable: optional #GCancellable object, %NULL to ignore
* @callback: (nullable): a #GAsyncReadyCallback to call when the request is done
* @user_data: (nullable): data to pass to @callback
*
* Asynchronously gets the default #GAppInfo for a given content type.
*
* Since: 2.74
*/
void
g_app_info_get_default_for_type_async (const char *content_type,
gboolean must_support_uris,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
DefaultForTypeData *data;
g_return_if_fail (content_type != NULL && *content_type != '\0');
g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
data = g_new0 (DefaultForTypeData, 1);
data->content_type = g_strdup (content_type);
data->must_support_uris = must_support_uris;
task = g_task_new (NULL, cancellable, callback, user_data);
g_task_set_source_tag (task, g_app_info_get_default_for_type_async);
g_task_set_task_data (task, data, (GDestroyNotify) default_for_type_data_free);
g_task_set_check_cancellable (task, TRUE);
g_task_run_in_thread (task, get_default_for_type_thread);
g_object_unref (task);
}
static void
get_default_for_scheme_thread (GTask *task,
gpointer object,
gpointer task_data,
GCancellable *cancellable)
{
const char *uri_scheme = task_data;
GAppInfo *info;
info = g_app_info_get_default_for_uri_scheme (uri_scheme);
if (!info)
{
g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_NOT_FOUND,
_("Failed to find default application for "
"URI Scheme ‘%s’"), uri_scheme);
return;
}
g_task_return_pointer (task, g_steal_pointer (&info), g_object_unref);
}
/**
* g_app_info_get_default_for_uri_scheme_async:
* @uri_scheme: a string containing a URI scheme.
* @cancellable: optional #GCancellable object, %NULL to ignore
* @callback: (nullable): a #GAsyncReadyCallback to call when the request is done
* @user_data: (nullable): data to pass to @callback
*
* Asynchronously gets the default application for handling URIs with
* the given URI scheme. A URI scheme is the initial part
* of the URI, up to but not including the ':', e.g. "http",
* "ftp" or "sip".
*
* Since: 2.74
*/
void
g_app_info_get_default_for_uri_scheme_async (const char *uri_scheme,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
g_return_if_fail (uri_scheme != NULL && *uri_scheme != '\0');
g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
task = g_task_new (NULL, cancellable, callback, user_data);
g_task_set_source_tag (task, g_app_info_get_default_for_uri_scheme_async);
g_task_set_task_data (task, g_strdup (uri_scheme), g_free);
g_task_set_check_cancellable (task, TRUE);
g_task_run_in_thread (task, get_default_for_scheme_thread);
g_object_unref (task);
}
/**
* g_app_info_get_default_for_uri_scheme_finish:
* @result: a #GAsyncResult
* @error: (nullable): a #GError
*
* Finishes a default #GAppInfo lookup started by
* g_app_info_get_default_for_uri_scheme_async().
*
* If no #GAppInfo is found, then @error will be set to %G_IO_ERROR_NOT_FOUND.
*
* Returns: (transfer full): #GAppInfo for given @uri_scheme or
* %NULL on error.
*
* Since: 2.74
*/
GAppInfo *
g_app_info_get_default_for_uri_scheme_finish (GAsyncResult *result,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (result, NULL), NULL);
g_return_val_if_fail (g_task_get_source_tag (G_TASK (result)) ==
g_app_info_get_default_for_uri_scheme_async, NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
return g_task_propagate_pointer (G_TASK (result), error);
}
/**
* g_app_info_get_default_for_type_finish:
* @result: a #GAsyncResult
* @error: (nullable): a #GError
*
* Finishes a default #GAppInfo lookup started by
* g_app_info_get_default_for_type_async().
*
* If no #GAppInfo is found, then @error will be set to %G_IO_ERROR_NOT_FOUND.
*
* Returns: (transfer full): #GAppInfo for given @content_type or
* %NULL on error.
*
* Since: 2.74
*/
GAppInfo *
g_app_info_get_default_for_type_finish (GAsyncResult *result,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (result, NULL), NULL);
g_return_val_if_fail (g_task_get_source_tag (G_TASK (result)) ==
g_app_info_get_default_for_type_async, NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
return g_task_propagate_pointer (G_TASK (result), error);
}
/**
* g_app_info_launch_default_for_uri:
* @uri: the uri to show
* @context: (nullable): an optional #GAppLaunchContext
* @error: (nullable): return location for an error, or %NULL
*
* Utility function that launches the default application
* registered to handle the specified uri. Synchronous I/O
* is done on the uri to detect the type of the file if
* required.
*
* The D-Bus–activated applications don't have to be started if your application
* terminates too soon after this function. To prevent this, use
* g_app_info_launch_default_for_uri_async() instead.
*
* Returns: %TRUE on success, %FALSE on error.
**/
gboolean
g_app_info_launch_default_for_uri (const char *uri,
GAppLaunchContext *launch_context,
GError **error)
{
char *uri_scheme;
GAppInfo *app_info = NULL;
gboolean res = FALSE;
/* g_file_query_default_handler() calls
* g_app_info_get_default_for_uri_scheme() too, but we have to do it
* here anyway in case GFile can't parse @uri correctly.
*/
uri_scheme = g_uri_parse_scheme (uri);
if (uri_scheme && uri_scheme[0] != '\0')
app_info = g_app_info_get_default_for_uri_scheme (uri_scheme);
g_free (uri_scheme);
if (!app_info)
{
GFile *file;
file = g_file_new_for_uri (uri);
app_info = g_file_query_default_handler (file, NULL, error);
g_object_unref (file);
}
if (app_info)
{
GList l;
l.data = (char *)uri;
l.next = l.prev = NULL;
res = g_app_info_launch_uris (app_info, &l, launch_context, error);
g_object_unref (app_info);
}
#ifdef G_OS_UNIX
if (!res && glib_should_use_portal ())
{
const char *parent_window = NULL;
/* Reset any error previously set by launch_default_for_uri */
g_clear_error (error);
if (launch_context && launch_context->priv->envp)
parent_window = g_environ_getenv (launch_context->priv->envp, "PARENT_WINDOW_ID");
return g_openuri_portal_open_uri (uri, parent_window, error);
}
#endif
return res;
}
typedef struct
{
gchar *uri;
GAppLaunchContext *context;
} LaunchDefaultForUriData;
static void
launch_default_for_uri_data_free (LaunchDefaultForUriData *data)
{
g_free (data->uri);
g_clear_object (&data->context);
g_free (data);
}
#ifdef G_OS_UNIX
static void
launch_default_for_uri_portal_open_uri_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
GTask *task = G_TASK (user_data);
GError *error = NULL;
if (g_openuri_portal_open_uri_finish (result, &error))
g_task_return_boolean (task, TRUE);
else
g_task_return_error (task, g_steal_pointer (&error));
g_object_unref (task);
}
#endif
static void
launch_default_for_uri_portal_open_uri (GTask *task, GError *error)
{
#ifdef G_OS_UNIX
LaunchDefaultForUriData *data = g_task_get_task_data (task);
GCancellable *cancellable = g_task_get_cancellable (task);
if (glib_should_use_portal ())
{
const char *parent_window = NULL;
/* Reset any error previously set by launch_default_for_uri */
g_error_free (error);
if (data->context && data->context->priv->envp)
parent_window = g_environ_getenv (data->context->priv->envp,
"PARENT_WINDOW_ID");
g_openuri_portal_open_uri_async (data->uri,
parent_window,
cancellable,
launch_default_for_uri_portal_open_uri_cb,
g_steal_pointer (&task));
return;
}
#endif
g_task_return_error (task, g_steal_pointer (&error));
g_object_unref (task);
}
static void
launch_default_for_uri_launch_uris_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
GAppInfo *app_info = G_APP_INFO (object);
GTask *task = G_TASK (user_data);
GError *error = NULL;
if (g_app_info_launch_uris_finish (app_info, result, &error))
{
g_task_return_boolean (task, TRUE);
g_object_unref (task);
}
else
launch_default_for_uri_portal_open_uri (g_steal_pointer (&task), g_steal_pointer (&error));
}
static void
launch_default_for_uri_launch_uris (GTask *task,
GAppInfo *app_info)
{
GCancellable *cancellable = g_task_get_cancellable (task);
GList l;
LaunchDefaultForUriData *data = g_task_get_task_data (task);
l.data = (char *)data->uri;
l.next = l.prev = NULL;
g_app_info_launch_uris_async (app_info,
&l,
data->context,
cancellable,
launch_default_for_uri_launch_uris_cb,
g_steal_pointer (&task));
g_object_unref (app_info);
}
static void
launch_default_for_uri_default_handler_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
GFile *file = G_FILE (object);
GTask *task = G_TASK (user_data);
GAppInfo *app_info = NULL;
GError *error = NULL;
app_info = g_file_query_default_handler_finish (file, result, &error);
if (app_info)
launch_default_for_uri_launch_uris (g_steal_pointer (&task), g_steal_pointer (&app_info));
else
launch_default_for_uri_portal_open_uri (g_steal_pointer (&task), g_steal_pointer (&error));
}
static void
launch_default_app_for_default_handler (GTask *task)
{
GFile *file;
GCancellable *cancellable;
LaunchDefaultForUriData *data;
data = g_task_get_task_data (task);
cancellable = g_task_get_cancellable (task);
file = g_file_new_for_uri (data->uri);
g_file_query_default_handler_async (file,
G_PRIORITY_DEFAULT,
cancellable,
launch_default_for_uri_default_handler_cb,
g_steal_pointer (&task));
g_object_unref (file);
}
static void
launch_default_app_for_uri_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
GTask *task = G_TASK (user_data);
GAppInfo *app_info;
app_info = g_app_info_get_default_for_uri_scheme_finish (result, NULL);
if (!app_info)
{
launch_default_app_for_default_handler (g_steal_pointer (&task));
}
else
{
launch_default_for_uri_launch_uris (g_steal_pointer (&task),
g_steal_pointer (&app_info));
}
}
/**
* g_app_info_launch_default_for_uri_async:
* @uri: the uri to show
* @context: (nullable): an optional #GAppLaunchContext
* @cancellable: (nullable): a #GCancellable
* @callback: (nullable): a #GAsyncReadyCallback to call when the request is done
* @user_data: (nullable): data to pass to @callback
*
* Async version of g_app_info_launch_default_for_uri().
*
* This version is useful if you are interested in receiving
* error information in the case where the application is
* sandboxed and the portal may present an application chooser
* dialog to the user.
*
* This is also useful if you want to be sure that the D-Bus–activated
* applications are really started before termination and if you are interested
* in receiving error information from their activation.
*
* Since: 2.50
*/
void
g_app_info_launch_default_for_uri_async (const char *uri,
GAppLaunchContext *context,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
char *uri_scheme;
LaunchDefaultForUriData *data;
g_return_if_fail (uri != NULL);
task = g_task_new (NULL, cancellable, callback, user_data);
g_task_set_source_tag (task, g_app_info_launch_default_for_uri_async);
data = g_new (LaunchDefaultForUriData, 1);
data->uri = g_strdup (uri);
data->context = (context != NULL) ? g_object_ref (context) : NULL;
g_task_set_task_data (task, g_steal_pointer (&data), (GDestroyNotify) launch_default_for_uri_data_free);
/* g_file_query_default_handler_async() calls
* g_app_info_get_default_for_uri_scheme() too, but we have to do it
* here anyway in case GFile can't parse @uri correctly.
*/
uri_scheme = g_uri_parse_scheme (uri);
if (uri_scheme && uri_scheme[0] != '\0')
{
g_app_info_get_default_for_uri_scheme_async (uri_scheme,
cancellable,
launch_default_app_for_uri_cb,
g_steal_pointer (&task));
}
else
{
launch_default_app_for_default_handler (g_steal_pointer (&task));
}
g_free (uri_scheme);
}
/**
* g_app_info_launch_default_for_uri_finish:
* @result: a #GAsyncResult
* @error: (nullable): return location for an error, or %NULL
*
* Finishes an asynchronous launch-default-for-uri operation.
*
* Returns: %TRUE if the launch was successful, %FALSE if @error is set
*
* Since: 2.50
*/
gboolean
g_app_info_launch_default_for_uri_finish (GAsyncResult *result,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (result, NULL), FALSE);
return g_task_propagate_boolean (G_TASK (result), error);
}
/**
* g_app_info_can_delete:
* @appinfo: a #GAppInfo
*
* Obtains the information whether the #GAppInfo can be deleted.
* See g_app_info_delete().
*
* Returns: %TRUE if @appinfo can be deleted
*
* Since: 2.20
*/
gboolean
g_app_info_can_delete (GAppInfo *appinfo)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
iface = G_APP_INFO_GET_IFACE (appinfo);
if (iface->can_delete)
return (* iface->can_delete) (appinfo);
return FALSE;
}
/**
* g_app_info_delete: (virtual do_delete)
* @appinfo: a #GAppInfo
*
* Tries to delete a #GAppInfo.
*
* On some platforms, there may be a difference between user-defined
* #GAppInfos which can be deleted, and system-wide ones which cannot.
* See g_app_info_can_delete().
*
* Returns: %TRUE if @appinfo has been deleted
*
* Since: 2.20
*/
gboolean
g_app_info_delete (GAppInfo *appinfo)
{
GAppInfoIface *iface;
g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
iface = G_APP_INFO_GET_IFACE (appinfo);
if (iface->do_delete)
return (* iface->do_delete) (appinfo);
return FALSE;
}
enum {
LAUNCH_FAILED,
LAUNCH_STARTED,
LAUNCHED,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE_WITH_PRIVATE (GAppLaunchContext, g_app_launch_context, G_TYPE_OBJECT)
/**
* g_app_launch_context_new:
*
* Creates a new application launch context. This is not normally used,
* instead you instantiate a subclass of this, such as #GdkAppLaunchContext.
*
* Returns: a #GAppLaunchContext.
**/
GAppLaunchContext *
g_app_launch_context_new (void)
{
return g_object_new (G_TYPE_APP_LAUNCH_CONTEXT, NULL);
}
static void
g_app_launch_context_finalize (GObject *object)
{
GAppLaunchContext *context = G_APP_LAUNCH_CONTEXT (object);
g_strfreev (context->priv->envp);
G_OBJECT_CLASS (g_app_launch_context_parent_class)->finalize (object);
}
static void
g_app_launch_context_class_init (GAppLaunchContextClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = g_app_launch_context_finalize;
/**
* GAppLaunchContext::launch-failed:
* @context: the object emitting the signal
* @startup_notify_id: the startup notification id for the failed launch
*
* The #GAppLaunchContext::launch-failed signal is emitted when a #GAppInfo launch
* fails. The startup notification id is provided, so that the launcher
* can cancel the startup notification.
*
* Because a launch operation may involve spawning multiple instances of the
* target application, you should expect this signal to be emitted multiple
* times, one for each spawned instance.
*
* Since: 2.36
*/
signals[LAUNCH_FAILED] = g_signal_new (I_("launch-failed"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GAppLaunchContextClass, launch_failed),
NULL, NULL, NULL,
G_TYPE_NONE, 1, G_TYPE_STRING);
/**
* GAppLaunchContext::launch-started:
* @context: the object emitting the signal
* @info: the #GAppInfo that is about to be launched
* @platform_data: (nullable): additional platform-specific data for this launch
*
* The #GAppLaunchContext::launch-started signal is emitted when a #GAppInfo is
* about to be launched. If non-null the @platform_data is an
* GVariant dictionary mapping strings to variants (ie `a{sv}`), which
* contains additional, platform-specific data about this launch. On
* UNIX, at least the `startup-notification-id` keys will be
* present.
*
* The value of the `startup-notification-id` key (type `s`) is a startup
* notification ID corresponding to the format from the [startup-notification
* specification](https://specifications.freedesktop.org/startup-notification-spec/startup-notification-0.1.txt).
* It allows tracking the progress of the launchee through startup.
*
* It is guaranteed that this signal is followed by either a #GAppLaunchContext::launched or
* #GAppLaunchContext::launch-failed signal.
*
* Because a launch operation may involve spawning multiple instances of the
* target application, you should expect this signal to be emitted multiple
* times, one for each spawned instance.
*
* Since: 2.72
*/
signals[LAUNCH_STARTED] = g_signal_new (I_("launch-started"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GAppLaunchContextClass, launch_started),
NULL, NULL,
_g_cclosure_marshal_VOID__OBJECT_VARIANT,
G_TYPE_NONE, 2,
G_TYPE_APP_INFO, G_TYPE_VARIANT);
g_signal_set_va_marshaller (signals[LAUNCH_STARTED],
G_TYPE_FROM_CLASS (klass),
_g_cclosure_marshal_VOID__OBJECT_VARIANTv);
/**
* GAppLaunchContext::launched:
* @context: the object emitting the signal
* @info: the #GAppInfo that was just launched
* @platform_data: additional platform-specific data for this launch
*
* The #GAppLaunchContext::launched signal is emitted when a #GAppInfo is successfully
* launched.
*
* Because a launch operation may involve spawning multiple instances of the
* target application, you should expect this signal to be emitted multiple
* times, one time for each spawned instance.
*
* The @platform_data is an GVariant dictionary mapping
* strings to variants (ie `a{sv}`), which contains additional,
* platform-specific data about this launch. On UNIX, at least the
* `pid` and `startup-notification-id` keys will be present.
*
* Since 2.72 the `pid` may be 0 if the process id wasn't known (for
* example if the process was launched via D-Bus). The `pid` may not be
* set at all in subsequent releases.
*
* On Windows, `pid` is guaranteed to be valid only for the duration of the
* #GAppLaunchContext::launched signal emission; after the signal is emitted,
* GLib will call g_spawn_close_pid(). If you need to keep the #GPid after the
* signal has been emitted, then you can duplicate `pid` using `DuplicateHandle()`.
*
* Since: 2.36
*/
signals[LAUNCHED] = g_signal_new (I_("launched"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GAppLaunchContextClass, launched),
NULL, NULL,
_g_cclosure_marshal_VOID__OBJECT_VARIANT,
G_TYPE_NONE, 2,
G_TYPE_APP_INFO, G_TYPE_VARIANT);
g_signal_set_va_marshaller (signals[LAUNCHED],
G_TYPE_FROM_CLASS (klass),
_g_cclosure_marshal_VOID__OBJECT_VARIANTv);
}
static void
g_app_launch_context_init (GAppLaunchContext *context)
{
context->priv = g_app_launch_context_get_instance_private (context);
}
/**
* g_app_launch_context_setenv:
* @context: a #GAppLaunchContext
* @variable: (type filename): the environment variable to set
* @value: (type filename): the value for to set the variable to.
*
* Arranges for @variable to be set to @value in the child's
* environment when @context is used to launch an application.
*
* Since: 2.32
*/
void
g_app_launch_context_setenv (GAppLaunchContext *context,
const char *variable,
const char *value)
{
g_return_if_fail (G_IS_APP_LAUNCH_CONTEXT (context));
g_return_if_fail (variable != NULL);
g_return_if_fail (value != NULL);
if (!context->priv->envp)
context->priv->envp = g_get_environ ();
context->priv->envp =
g_environ_setenv (context->priv->envp, variable, value, TRUE);
}
/**
* g_app_launch_context_unsetenv:
* @context: a #GAppLaunchContext
* @variable: (type filename): the environment variable to remove
*
* Arranges for @variable to be unset in the child's environment
* when @context is used to launch an application.
*
* Since: 2.32
*/
void
g_app_launch_context_unsetenv (GAppLaunchContext *context,
const char *variable)
{
g_return_if_fail (G_IS_APP_LAUNCH_CONTEXT (context));
g_return_if_fail (variable != NULL);
if (!context->priv->envp)
context->priv->envp = g_get_environ ();
context->priv->envp =
g_environ_unsetenv (context->priv->envp, variable);
}
/**
* g_app_launch_context_get_environment:
* @context: a #GAppLaunchContext
*
* Gets the complete environment variable list to be passed to
* the child process when @context is used to launch an application.
* This is a %NULL-terminated array of strings, where each string has
* the form `KEY=VALUE`.
*
* Returns: (array zero-terminated=1) (element-type filename) (transfer full):
* the child's environment
*
* Since: 2.32
*/
char **
g_app_launch_context_get_environment (GAppLaunchContext *context)
{
g_return_val_if_fail (G_IS_APP_LAUNCH_CONTEXT (context), NULL);
if (!context->priv->envp)
context->priv->envp = g_get_environ ();
return g_strdupv (context->priv->envp);
}
/**
* g_app_launch_context_get_display:
* @context: a #GAppLaunchContext
* @info: a #GAppInfo
* @files: (element-type GFile): a #GList of #GFile objects
*
* Gets the display string for the @context. This is used to ensure new
* applications are started on the same display as the launching
* application, by setting the `DISPLAY` environment variable.
*
* Returns: (nullable): a display string for the display.
*/
char *
g_app_launch_context_get_display (GAppLaunchContext *context,
GAppInfo *info,
GList *files)
{
GAppLaunchContextClass *class;
g_return_val_if_fail (G_IS_APP_LAUNCH_CONTEXT (context), NULL);
g_return_val_if_fail (G_IS_APP_INFO (info), NULL);
class = G_APP_LAUNCH_CONTEXT_GET_CLASS (context);
if (class->get_display == NULL)
return NULL;
return class->get_display (context, info, files);
}
/**
* g_app_launch_context_get_startup_notify_id:
* @context: a #GAppLaunchContext
* @info: a #GAppInfo
* @files: (element-type GFile): a #GList of #GFile objects
*
* Initiates startup notification for the application and returns the
* `XDG_ACTIVATION_TOKEN` or `DESKTOP_STARTUP_ID` for the launched operation,
* if supported.
*
* The returned token may be referred to equivalently as an ‘activation token’
* (using Wayland terminology) or a ‘startup sequence ID’ (using X11 terminology).
* The two [are interoperable](https://gitlab.freedesktop.org/wayland/wayland-protocols/-/blob/main/staging/xdg-activation/x11-interoperation.rst).
*
* Activation tokens are defined in the [XDG Activation Protocol](https://wayland.app/protocols/xdg-activation-v1),
* and startup notification IDs are defined in the
* [freedesktop.org Startup Notification Protocol](http://standards.freedesktop.org/startup-notification-spec/startup-notification-latest.txt).
*
* Support for the XDG Activation Protocol was added in GLib 2.76.
*
* Returns: (nullable): a startup notification ID for the application, or %NULL if
* not supported.
**/
char *
g_app_launch_context_get_startup_notify_id (GAppLaunchContext *context,
GAppInfo *info,
GList *files)
{
GAppLaunchContextClass *class;
g_return_val_if_fail (G_IS_APP_LAUNCH_CONTEXT (context), NULL);
g_return_val_if_fail (G_IS_APP_INFO (info), NULL);
class = G_APP_LAUNCH_CONTEXT_GET_CLASS (context);
if (class->get_startup_notify_id == NULL)
return NULL;
return class->get_startup_notify_id (context, info, files);
}
/**
* g_app_launch_context_launch_failed:
* @context: a #GAppLaunchContext.
* @startup_notify_id: the startup notification id that was returned by g_app_launch_context_get_startup_notify_id().
*
* Called when an application has failed to launch, so that it can cancel
* the application startup notification started in g_app_launch_context_get_startup_notify_id().
*
**/
void
g_app_launch_context_launch_failed (GAppLaunchContext *context,
const char *startup_notify_id)
{
g_return_if_fail (G_IS_APP_LAUNCH_CONTEXT (context));
g_return_if_fail (startup_notify_id != NULL);
g_signal_emit (context, signals[LAUNCH_FAILED], 0, startup_notify_id);
}
/**
* GAppInfoMonitor:
*
* `GAppInfoMonitor` monitors application information for changes.
*
* `GAppInfoMonitor` is a very simple object used for monitoring the app
* info database for changes (newly installed or removed applications).
*
* Call [func@Gio.AppInfoMonitor.get] to get a `GAppInfoMonitor` and connect
* to the [signal@Gio.AppInfoMonitor::changed] signal. The signal will be emitted once when
* the app info database changes, and will not be emitted again until after the
* next call to [func@Gio.AppInfo.get_all] or another `g_app_info_*()` function.
* This is because monitoring the app info database for changes is expensive.
*
* The following functions will re-arm the [signal@Gio.AppInfoMonitor::changed]
* signal so it can be emitted again:
*
* - [func@Gio.AppInfo.get_all]
* - [func@Gio.AppInfo.get_all_for_type]
* - [func@Gio.AppInfo.get_default_for_type]
* - [func@Gio.AppInfo.get_fallback_for_type]
* - [func@Gio.AppInfo.get_recommended_for_type]
* - [`g_desktop_app_info_get_implementations()`](../gio-unix/type_func.DesktopAppInfo.get_implementation.html)
* - [`g_desktop_app_info_new()`](../gio-unix/ctor.DesktopAppInfo.new.html)
* - [`g_desktop_app_info_new_from_filename()`](../gio-unix/ctor.DesktopAppInfo.new_from_filename.html)
* - [`g_desktop_app_info_new_from_keyfile()`](../gio-unix/ctor.DesktopAppInfo.new_from_keyfile.html)
* - [`g_desktop_app_info_search()`](../gio-unix/type_func.DesktopAppInfo.search.html)
*
* The latter functions are available if using
* [`GDesktopAppInfo`](../gio-unix/class.DesktopAppInfo.html) from
* `gio-unix-2.0.pc` (GIR namespace `GioUnix-2.0`).
*
* In the usual case, applications should try to make note of the change
* (doing things like invalidating caches) but not act on it. In
* particular, applications should avoid making calls to `GAppInfo` APIs
* in response to the change signal, deferring these until the time that
* the updated data is actually required. The exception to this case is when
* application information is actually being displayed on the screen
* (for example, during a search or when the list of all applications is shown).
* The reason for this is that changes to the list of installed applications
* often come in groups (like during system updates) and rescanning the list
* on every change is pointless and expensive.
*
* Since: 2.40
*/
typedef struct _GAppInfoMonitorClass GAppInfoMonitorClass;
struct _GAppInfoMonitor
{
GObject parent_instance;
GMainContext *context;
};
struct _GAppInfoMonitorClass
{
GObjectClass parent_class;
};
static GContextSpecificGroup g_app_info_monitor_group;
static guint g_app_info_monitor_changed_signal;
G_DEFINE_TYPE (GAppInfoMonitor, g_app_info_monitor, G_TYPE_OBJECT)
static void
g_app_info_monitor_finalize (GObject *object)
{
GAppInfoMonitor *monitor = G_APP_INFO_MONITOR (object);
g_context_specific_group_remove (&g_app_info_monitor_group, monitor->context, monitor, NULL);
G_OBJECT_CLASS (g_app_info_monitor_parent_class)->finalize (object);
}
static void
g_app_info_monitor_init (GAppInfoMonitor *monitor)
{
}
static void
g_app_info_monitor_class_init (GAppInfoMonitorClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
/**
* GAppInfoMonitor::changed:
*
* Signal emitted when the app info database changes, when applications are
* installed or removed.
*
* Since: 2.40
**/
g_app_info_monitor_changed_signal = g_signal_new (I_("changed"), G_TYPE_APP_INFO_MONITOR, G_SIGNAL_RUN_FIRST,
0, NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
object_class->finalize = g_app_info_monitor_finalize;
}
/**
* g_app_info_monitor_get:
*
* Gets the #GAppInfoMonitor for the current thread-default main
* context.
*
* The #GAppInfoMonitor will emit a "changed" signal in the
* thread-default main context whenever the list of installed
* applications (as reported by g_app_info_get_all()) may have changed.
*
* The #GAppInfoMonitor::changed signal will only be emitted once until
* g_app_info_get_all() (or another `g_app_info_*()` function) is called. Doing
* so will re-arm the signal ready to notify about the next change.
*
* You must only call g_object_unref() on the return value from under
* the same main context as you created it.
*
* Returns: (transfer full): a reference to a #GAppInfoMonitor
*
* Since: 2.40
**/
GAppInfoMonitor *
g_app_info_monitor_get (void)
{
return g_context_specific_group_get (&g_app_info_monitor_group,
G_TYPE_APP_INFO_MONITOR,
G_STRUCT_OFFSET (GAppInfoMonitor, context),
NULL);
}
void
g_app_info_monitor_fire (void)
{
g_context_specific_group_emit (&g_app_info_monitor_group, g_app_info_monitor_changed_signal);
}
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