/* 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 . * * Author: Alexander Larsson */ #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 #include #ifdef G_OS_UNIX #include "gdbusconnection.h" #include "gdbusmessage.h" #include "gportalsupport.h" #include "gunixfdlist.h" #include "gopenuriportal.h" #include #include #include #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 [struct@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 [struct@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 (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: * @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(). * * Virtual: do_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: * * - [method@Gio.AppInfo.get_all] * - [method@Gio.AppInfo.get_all_for_type] * - [method@Gio.AppInfo.get_default_for_type] * - [method@Gio.AppInfo.get_fallback_for_type] * - [method@Gio.AppInfo.get_recommended_for_type] * - [method@Gio.DesktopAppInfo.get_implementations] * - [method@Gio.DesktopAppInfo.new] * - [method@Gio.DesktopAppInfo.new_from_filename] * - [method@Gio.DesktopAppInfo.new_from_keyfile] * - [method@Gio.DesktopAppInfo.search] * * 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); }