1/* GIO - GLib Input, Output and Streaming Library
2 *
3 * Copyright (C) 2006-2007 Red Hat, Inc.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General
16 * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
17 *
18 * Author: Alexander Larsson <alexl@redhat.com>
19 */
20
21#include "config.h"
22
23#include "gappinfo.h"
24#include "gappinfoprivate.h"
25#include "gcontextspecificgroup.h"
26#include "gtask.h"
27#include "gcancellable.h"
28
29#include "glibintl.h"
30#include "gmarshal-internal.h"
31#include <gioerror.h>
32#include <gfile.h>
33
34#ifdef G_OS_UNIX
35#include "gdbusconnection.h"
36#include "gdbusmessage.h"
37#include "gportalsupport.h"
38#include "gunixfdlist.h"
39#include "gopenuriportal.h"
40#include <sys/types.h>
41#include <sys/stat.h>
42#include <fcntl.h>
43#endif
44
45/**
46 * SECTION:gappinfo
47 * @short_description: Application information and launch contexts
48 * @include: gio/gio.h
49 * @see_also: #GAppInfoMonitor
50 *
51 * #GAppInfo and #GAppLaunchContext are used for describing and launching
52 * applications installed on the system.
53 *
54 * As of GLib 2.20, URIs will always be converted to POSIX paths
55 * (using g_file_get_path()) when using g_app_info_launch() even if
56 * the application requested an URI and not a POSIX path. For example
57 * for a desktop-file based application with Exec key `totem
58 * %U` and a single URI, `sftp://foo/file.avi`, then
59 * `/home/user/.gvfs/sftp on foo/file.avi` will be passed. This will
60 * only work if a set of suitable GIO extensions (such as gvfs 2.26
61 * compiled with FUSE support), is available and operational; if this
62 * is not the case, the URI will be passed unmodified to the application.
63 * Some URIs, such as `mailto:`, of course cannot be mapped to a POSIX
64 * path (in gvfs there's no FUSE mount for it); such URIs will be
65 * passed unmodified to the application.
66 *
67 * Specifically for gvfs 2.26 and later, the POSIX URI will be mapped
68 * back to the GIO URI in the #GFile constructors (since gvfs
69 * implements the #GVfs extension point). As such, if the application
70 * needs to examine the URI, it needs to use g_file_get_uri() or
71 * similar on #GFile. In other words, an application cannot assume
72 * that the URI passed to e.g. g_file_new_for_commandline_arg() is
73 * equal to the result of g_file_get_uri(). The following snippet
74 * illustrates this:
75 *
76 * |[
77 * GFile *f;
78 * char *uri;
79 *
80 * file = g_file_new_for_commandline_arg (uri_from_commandline);
81 *
82 * uri = g_file_get_uri (file);
83 * strcmp (uri, uri_from_commandline) == 0;
84 * g_free (uri);
85 *
86 * if (g_file_has_uri_scheme (file, "cdda"))
87 * {
88 * // do something special with uri
89 * }
90 * g_object_unref (file);
91 * ]|
92 *
93 * This code will work when both `cdda://sr0/Track 1.wav` and
94 * `/home/user/.gvfs/cdda on sr0/Track 1.wav` is passed to the
95 * application. It should be noted that it's generally not safe
96 * for applications to rely on the format of a particular URIs.
97 * Different launcher applications (e.g. file managers) may have
98 * different ideas of what a given URI means.
99 */
100
101struct _GAppLaunchContextPrivate {
102 char **envp;
103};
104
105typedef GAppInfoIface GAppInfoInterface;
106G_DEFINE_INTERFACE (GAppInfo, g_app_info, G_TYPE_OBJECT)
107
108static void
109g_app_info_default_init (GAppInfoInterface *iface)
110{
111}
112
113
114/**
115 * g_app_info_dup:
116 * @appinfo: a #GAppInfo.
117 *
118 * Creates a duplicate of a #GAppInfo.
119 *
120 * Returns: (transfer full): a duplicate of @appinfo.
121 **/
122GAppInfo *
123g_app_info_dup (GAppInfo *appinfo)
124{
125 GAppInfoIface *iface;
126
127 g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
128
129 iface = G_APP_INFO_GET_IFACE (appinfo);
130
131 return (* iface->dup) (appinfo);
132}
133
134/**
135 * g_app_info_equal:
136 * @appinfo1: the first #GAppInfo.
137 * @appinfo2: the second #GAppInfo.
138 *
139 * Checks if two #GAppInfos are equal.
140 *
141 * Note that the check *may not* compare each individual
142 * field, and only does an identity check. In case detecting changes in the
143 * contents is needed, program code must additionally compare relevant fields.
144 *
145 * Returns: %TRUE if @appinfo1 is equal to @appinfo2. %FALSE otherwise.
146 **/
147gboolean
148g_app_info_equal (GAppInfo *appinfo1,
149 GAppInfo *appinfo2)
150{
151 GAppInfoIface *iface;
152
153 g_return_val_if_fail (G_IS_APP_INFO (appinfo1), FALSE);
154 g_return_val_if_fail (G_IS_APP_INFO (appinfo2), FALSE);
155
156 if (G_TYPE_FROM_INSTANCE (appinfo1) != G_TYPE_FROM_INSTANCE (appinfo2))
157 return FALSE;
158
159 iface = G_APP_INFO_GET_IFACE (appinfo1);
160
161 return (* iface->equal) (appinfo1, appinfo2);
162}
163
164/**
165 * g_app_info_get_id:
166 * @appinfo: a #GAppInfo.
167 *
168 * Gets the ID of an application. An id is a string that
169 * identifies the application. The exact format of the id is
170 * platform dependent. For instance, on Unix this is the
171 * desktop file id from the xdg menu specification.
172 *
173 * Note that the returned ID may be %NULL, depending on how
174 * the @appinfo has been constructed.
175 *
176 * Returns: (nullable): a string containing the application's ID.
177 **/
178const char *
179g_app_info_get_id (GAppInfo *appinfo)
180{
181 GAppInfoIface *iface;
182
183 g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
184
185 iface = G_APP_INFO_GET_IFACE (appinfo);
186
187 return (* iface->get_id) (appinfo);
188}
189
190/**
191 * g_app_info_get_name:
192 * @appinfo: a #GAppInfo.
193 *
194 * Gets the installed name of the application.
195 *
196 * Returns: the name of the application for @appinfo.
197 **/
198const char *
199g_app_info_get_name (GAppInfo *appinfo)
200{
201 GAppInfoIface *iface;
202
203 g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
204
205 iface = G_APP_INFO_GET_IFACE (appinfo);
206
207 return (* iface->get_name) (appinfo);
208}
209
210/**
211 * g_app_info_get_display_name:
212 * @appinfo: a #GAppInfo.
213 *
214 * Gets the display name of the application. The display name is often more
215 * descriptive to the user than the name itself.
216 *
217 * Returns: the display name of the application for @appinfo, or the name if
218 * no display name is available.
219 *
220 * Since: 2.24
221 **/
222const char *
223g_app_info_get_display_name (GAppInfo *appinfo)
224{
225 GAppInfoIface *iface;
226
227 g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
228
229 iface = G_APP_INFO_GET_IFACE (appinfo);
230
231 if (iface->get_display_name == NULL)
232 return (* iface->get_name) (appinfo);
233
234 return (* iface->get_display_name) (appinfo);
235}
236
237/**
238 * g_app_info_get_description:
239 * @appinfo: a #GAppInfo.
240 *
241 * Gets a human-readable description of an installed application.
242 *
243 * Returns: (nullable): a string containing a description of the
244 * application @appinfo, or %NULL if none.
245 **/
246const char *
247g_app_info_get_description (GAppInfo *appinfo)
248{
249 GAppInfoIface *iface;
250
251 g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
252
253 iface = G_APP_INFO_GET_IFACE (appinfo);
254
255 return (* iface->get_description) (appinfo);
256}
257
258/**
259 * g_app_info_get_executable: (virtual get_executable)
260 * @appinfo: a #GAppInfo
261 *
262 * Gets the executable's name for the installed application.
263 *
264 * Returns: (type filename): a string containing the @appinfo's application
265 * binaries name
266 **/
267const char *
268g_app_info_get_executable (GAppInfo *appinfo)
269{
270 GAppInfoIface *iface;
271
272 g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
273
274 iface = G_APP_INFO_GET_IFACE (appinfo);
275
276 return (* iface->get_executable) (appinfo);
277}
278
279
280/**
281 * g_app_info_get_commandline: (virtual get_commandline)
282 * @appinfo: a #GAppInfo
283 *
284 * Gets the commandline with which the application will be
285 * started.
286 *
287 * Returns: (nullable) (type filename): a string containing the @appinfo's commandline,
288 * or %NULL if this information is not available
289 *
290 * Since: 2.20
291 **/
292const char *
293g_app_info_get_commandline (GAppInfo *appinfo)
294{
295 GAppInfoIface *iface;
296
297 g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
298
299 iface = G_APP_INFO_GET_IFACE (appinfo);
300
301 if (iface->get_commandline)
302 return (* iface->get_commandline) (appinfo);
303
304 return NULL;
305}
306
307/**
308 * g_app_info_set_as_default_for_type:
309 * @appinfo: a #GAppInfo.
310 * @content_type: the content type.
311 * @error: a #GError.
312 *
313 * Sets the application as the default handler for a given type.
314 *
315 * Returns: %TRUE on success, %FALSE on error.
316 **/
317gboolean
318g_app_info_set_as_default_for_type (GAppInfo *appinfo,
319 const char *content_type,
320 GError **error)
321{
322 GAppInfoIface *iface;
323
324 g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
325 g_return_val_if_fail (content_type != NULL, FALSE);
326
327 iface = G_APP_INFO_GET_IFACE (appinfo);
328
329 return (* iface->set_as_default_for_type) (appinfo, content_type, error);
330}
331
332/**
333 * g_app_info_set_as_last_used_for_type:
334 * @appinfo: a #GAppInfo.
335 * @content_type: the content type.
336 * @error: a #GError.
337 *
338 * Sets the application as the last used application for a given type.
339 * This will make the application appear as first in the list returned
340 * by g_app_info_get_recommended_for_type(), regardless of the default
341 * application for that content type.
342 *
343 * Returns: %TRUE on success, %FALSE on error.
344 **/
345gboolean
346g_app_info_set_as_last_used_for_type (GAppInfo *appinfo,
347 const char *content_type,
348 GError **error)
349{
350 GAppInfoIface *iface;
351
352 g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
353 g_return_val_if_fail (content_type != NULL, FALSE);
354
355 iface = G_APP_INFO_GET_IFACE (appinfo);
356
357 return (* iface->set_as_last_used_for_type) (appinfo, content_type, error);
358}
359
360/**
361 * g_app_info_set_as_default_for_extension:
362 * @appinfo: a #GAppInfo.
363 * @extension: (type filename): a string containing the file extension
364 * (without the dot).
365 * @error: a #GError.
366 *
367 * Sets the application as the default handler for the given file extension.
368 *
369 * Returns: %TRUE on success, %FALSE on error.
370 **/
371gboolean
372g_app_info_set_as_default_for_extension (GAppInfo *appinfo,
373 const char *extension,
374 GError **error)
375{
376 GAppInfoIface *iface;
377
378 g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
379 g_return_val_if_fail (extension != NULL, FALSE);
380
381 iface = G_APP_INFO_GET_IFACE (appinfo);
382
383 if (iface->set_as_default_for_extension)
384 return (* iface->set_as_default_for_extension) (appinfo, extension, error);
385
386 g_set_error_literal (err: error, G_IO_ERROR, code: G_IO_ERROR_NOT_SUPPORTED,
387 message: "g_app_info_set_as_default_for_extension not supported yet");
388 return FALSE;
389}
390
391
392/**
393 * g_app_info_add_supports_type:
394 * @appinfo: a #GAppInfo.
395 * @content_type: a string.
396 * @error: a #GError.
397 *
398 * Adds a content type to the application information to indicate the
399 * application is capable of opening files with the given content type.
400 *
401 * Returns: %TRUE on success, %FALSE on error.
402 **/
403gboolean
404g_app_info_add_supports_type (GAppInfo *appinfo,
405 const char *content_type,
406 GError **error)
407{
408 GAppInfoIface *iface;
409
410 g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
411 g_return_val_if_fail (content_type != NULL, FALSE);
412
413 iface = G_APP_INFO_GET_IFACE (appinfo);
414
415 if (iface->add_supports_type)
416 return (* iface->add_supports_type) (appinfo, content_type, error);
417
418 g_set_error_literal (err: error, G_IO_ERROR,
419 code: G_IO_ERROR_NOT_SUPPORTED,
420 message: "g_app_info_add_supports_type not supported yet");
421
422 return FALSE;
423}
424
425
426/**
427 * g_app_info_can_remove_supports_type:
428 * @appinfo: a #GAppInfo.
429 *
430 * Checks if a supported content type can be removed from an application.
431 *
432 * Returns: %TRUE if it is possible to remove supported
433 * content types from a given @appinfo, %FALSE if not.
434 **/
435gboolean
436g_app_info_can_remove_supports_type (GAppInfo *appinfo)
437{
438 GAppInfoIface *iface;
439
440 g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
441
442 iface = G_APP_INFO_GET_IFACE (appinfo);
443
444 if (iface->can_remove_supports_type)
445 return (* iface->can_remove_supports_type) (appinfo);
446
447 return FALSE;
448}
449
450
451/**
452 * g_app_info_remove_supports_type:
453 * @appinfo: a #GAppInfo.
454 * @content_type: a string.
455 * @error: a #GError.
456 *
457 * Removes a supported type from an application, if possible.
458 *
459 * Returns: %TRUE on success, %FALSE on error.
460 **/
461gboolean
462g_app_info_remove_supports_type (GAppInfo *appinfo,
463 const char *content_type,
464 GError **error)
465{
466 GAppInfoIface *iface;
467
468 g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
469 g_return_val_if_fail (content_type != NULL, FALSE);
470
471 iface = G_APP_INFO_GET_IFACE (appinfo);
472
473 if (iface->remove_supports_type)
474 return (* iface->remove_supports_type) (appinfo, content_type, error);
475
476 g_set_error_literal (err: error, G_IO_ERROR,
477 code: G_IO_ERROR_NOT_SUPPORTED,
478 message: "g_app_info_remove_supports_type not supported yet");
479
480 return FALSE;
481}
482
483/**
484 * g_app_info_get_supported_types:
485 * @appinfo: a #GAppInfo that can handle files
486 *
487 * Retrieves the list of content types that @app_info claims to support.
488 * If this information is not provided by the environment, this function
489 * will return %NULL.
490 * This function does not take in consideration associations added with
491 * g_app_info_add_supports_type(), but only those exported directly by
492 * the application.
493 *
494 * Returns: (transfer none) (array zero-terminated=1) (element-type utf8):
495 * a list of content types.
496 *
497 * Since: 2.34
498 */
499const char **
500g_app_info_get_supported_types (GAppInfo *appinfo)
501{
502 GAppInfoIface *iface;
503
504 g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
505
506 iface = G_APP_INFO_GET_IFACE (appinfo);
507
508 if (iface->get_supported_types)
509 return iface->get_supported_types (appinfo);
510 else
511 return NULL;
512}
513
514
515/**
516 * g_app_info_get_icon:
517 * @appinfo: a #GAppInfo.
518 *
519 * Gets the icon for the application.
520 *
521 * Returns: (nullable) (transfer none): the default #GIcon for @appinfo or %NULL
522 * if there is no default icon.
523 **/
524GIcon *
525g_app_info_get_icon (GAppInfo *appinfo)
526{
527 GAppInfoIface *iface;
528
529 g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
530
531 iface = G_APP_INFO_GET_IFACE (appinfo);
532
533 return (* iface->get_icon) (appinfo);
534}
535
536
537/**
538 * g_app_info_launch:
539 * @appinfo: a #GAppInfo
540 * @files: (nullable) (element-type GFile): a #GList of #GFile objects
541 * @context: (nullable): a #GAppLaunchContext or %NULL
542 * @error: a #GError
543 *
544 * Launches the application. Passes @files to the launched application
545 * as arguments, using the optional @context to get information
546 * about the details of the launcher (like what screen it is on).
547 * On error, @error will be set accordingly.
548 *
549 * To launch the application without arguments pass a %NULL @files list.
550 *
551 * Note that even if the launch is successful the application launched
552 * can fail to start if it runs into problems during startup. There is
553 * no way to detect this.
554 *
555 * Some URIs can be changed when passed through a GFile (for instance
556 * unsupported URIs with strange formats like mailto:), so if you have
557 * a textual URI you want to pass in as argument, consider using
558 * g_app_info_launch_uris() instead.
559 *
560 * The launched application inherits the environment of the launching
561 * process, but it can be modified with g_app_launch_context_setenv()
562 * and g_app_launch_context_unsetenv().
563 *
564 * On UNIX, this function sets the `GIO_LAUNCHED_DESKTOP_FILE`
565 * environment variable with the path of the launched desktop file and
566 * `GIO_LAUNCHED_DESKTOP_FILE_PID` to the process id of the launched
567 * process. This can be used to ignore `GIO_LAUNCHED_DESKTOP_FILE`,
568 * should it be inherited by further processes. The `DISPLAY` and
569 * `DESKTOP_STARTUP_ID` environment variables are also set, based
570 * on information provided in @context.
571 *
572 * Returns: %TRUE on successful launch, %FALSE otherwise.
573 **/
574gboolean
575g_app_info_launch (GAppInfo *appinfo,
576 GList *files,
577 GAppLaunchContext *launch_context,
578 GError **error)
579{
580 GAppInfoIface *iface;
581
582 g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
583
584 iface = G_APP_INFO_GET_IFACE (appinfo);
585
586 return (* iface->launch) (appinfo, files, launch_context, error);
587}
588
589
590/**
591 * g_app_info_supports_uris:
592 * @appinfo: a #GAppInfo.
593 *
594 * Checks if the application supports reading files and directories from URIs.
595 *
596 * Returns: %TRUE if the @appinfo supports URIs.
597 **/
598gboolean
599g_app_info_supports_uris (GAppInfo *appinfo)
600{
601 GAppInfoIface *iface;
602
603 g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
604
605 iface = G_APP_INFO_GET_IFACE (appinfo);
606
607 return (* iface->supports_uris) (appinfo);
608}
609
610
611/**
612 * g_app_info_supports_files:
613 * @appinfo: a #GAppInfo.
614 *
615 * Checks if the application accepts files as arguments.
616 *
617 * Returns: %TRUE if the @appinfo supports files.
618 **/
619gboolean
620g_app_info_supports_files (GAppInfo *appinfo)
621{
622 GAppInfoIface *iface;
623
624 g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
625
626 iface = G_APP_INFO_GET_IFACE (appinfo);
627
628 return (* iface->supports_files) (appinfo);
629}
630
631
632/**
633 * g_app_info_launch_uris:
634 * @appinfo: a #GAppInfo
635 * @uris: (nullable) (element-type utf8): a #GList containing URIs to launch.
636 * @context: (nullable): a #GAppLaunchContext or %NULL
637 * @error: a #GError
638 *
639 * Launches the application. This passes the @uris to the launched application
640 * as arguments, using the optional @context to get information
641 * about the details of the launcher (like what screen it is on).
642 * On error, @error will be set accordingly.
643 *
644 * To launch the application without arguments pass a %NULL @uris list.
645 *
646 * Note that even if the launch is successful the application launched
647 * can fail to start if it runs into problems during startup. There is
648 * no way to detect this.
649 *
650 * Returns: %TRUE on successful launch, %FALSE otherwise.
651 **/
652gboolean
653g_app_info_launch_uris (GAppInfo *appinfo,
654 GList *uris,
655 GAppLaunchContext *launch_context,
656 GError **error)
657{
658 GAppInfoIface *iface;
659
660 g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
661
662 iface = G_APP_INFO_GET_IFACE (appinfo);
663
664 return (* iface->launch_uris) (appinfo, uris, launch_context, error);
665}
666
667/**
668 * g_app_info_launch_uris_async:
669 * @appinfo: a #GAppInfo
670 * @uris: (nullable) (element-type utf8): a #GList containing URIs to launch.
671 * @context: (nullable): a #GAppLaunchContext or %NULL
672 * @cancellable: (nullable): a #GCancellable
673 * @callback: (nullable): a #GAsyncReadyCallback to call when the request is done
674 * @user_data: (nullable): data to pass to @callback
675 *
676 * Async version of g_app_info_launch_uris().
677 *
678 * The @callback is invoked immediately after the application launch, but it
679 * waits for activation in case of D-Bus–activated applications and also provides
680 * extended error information for sandboxed applications, see notes for
681 * g_app_info_launch_default_for_uri_async().
682 *
683 * Since: 2.60
684 **/
685void
686g_app_info_launch_uris_async (GAppInfo *appinfo,
687 GList *uris,
688 GAppLaunchContext *context,
689 GCancellable *cancellable,
690 GAsyncReadyCallback callback,
691 gpointer user_data)
692{
693 GAppInfoIface *iface;
694
695 g_return_if_fail (G_IS_APP_INFO (appinfo));
696 g_return_if_fail (context == NULL || G_IS_APP_LAUNCH_CONTEXT (context));
697 g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
698
699 iface = G_APP_INFO_GET_IFACE (appinfo);
700 if (iface->launch_uris_async == NULL)
701 {
702 GTask *task;
703
704 task = g_task_new (source_object: appinfo, cancellable, callback, callback_data: user_data);
705 g_task_set_source_tag (task, g_app_info_launch_uris_async);
706 g_task_return_new_error (task, G_IO_ERROR, code: G_IO_ERROR_NOT_SUPPORTED,
707 format: "Operation not supported for the current backend.");
708 g_object_unref (object: task);
709
710 return;
711 }
712
713 (* iface->launch_uris_async) (appinfo, uris, context, cancellable, callback, user_data);
714}
715
716/**
717 * g_app_info_launch_uris_finish:
718 * @appinfo: a #GAppInfo
719 * @result: a #GAsyncResult
720 * @error: (nullable): a #GError
721 *
722 * Finishes a g_app_info_launch_uris_async() operation.
723 *
724 * Returns: %TRUE on successful launch, %FALSE otherwise.
725 *
726 * Since: 2.60
727 */
728gboolean
729g_app_info_launch_uris_finish (GAppInfo *appinfo,
730 GAsyncResult *result,
731 GError **error)
732{
733 GAppInfoIface *iface;
734
735 g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
736
737 iface = G_APP_INFO_GET_IFACE (appinfo);
738 if (iface->launch_uris_finish == NULL)
739 {
740 g_set_error_literal (err: error, G_IO_ERROR, code: G_IO_ERROR_NOT_SUPPORTED,
741 message: "Operation not supported for the current backend.");
742 return FALSE;
743 }
744
745 return (* iface->launch_uris_finish) (appinfo, result, error);
746}
747
748/**
749 * g_app_info_should_show:
750 * @appinfo: a #GAppInfo.
751 *
752 * Checks if the application info should be shown in menus that
753 * list available applications.
754 *
755 * Returns: %TRUE if the @appinfo should be shown, %FALSE otherwise.
756 **/
757gboolean
758g_app_info_should_show (GAppInfo *appinfo)
759{
760 GAppInfoIface *iface;
761
762 g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
763
764 iface = G_APP_INFO_GET_IFACE (appinfo);
765
766 return (* iface->should_show) (appinfo);
767}
768
769/**
770 * g_app_info_launch_default_for_uri:
771 * @uri: the uri to show
772 * @context: (nullable): an optional #GAppLaunchContext
773 * @error: (nullable): return location for an error, or %NULL
774 *
775 * Utility function that launches the default application
776 * registered to handle the specified uri. Synchronous I/O
777 * is done on the uri to detect the type of the file if
778 * required.
779 *
780 * The D-Bus–activated applications don't have to be started if your application
781 * terminates too soon after this function. To prevent this, use
782 * g_app_info_launch_default_for_uri_async() instead.
783 *
784 * Returns: %TRUE on success, %FALSE on error.
785 **/
786gboolean
787g_app_info_launch_default_for_uri (const char *uri,
788 GAppLaunchContext *launch_context,
789 GError **error)
790{
791 char *uri_scheme;
792 GAppInfo *app_info = NULL;
793 gboolean res = FALSE;
794
795 /* g_file_query_default_handler() calls
796 * g_app_info_get_default_for_uri_scheme() too, but we have to do it
797 * here anyway in case GFile can't parse @uri correctly.
798 */
799 uri_scheme = g_uri_parse_scheme (uri);
800 if (uri_scheme && uri_scheme[0] != '\0')
801 app_info = g_app_info_get_default_for_uri_scheme (uri_scheme);
802 g_free (mem: uri_scheme);
803
804 if (!app_info)
805 {
806 GFile *file;
807
808 file = g_file_new_for_uri (uri);
809 app_info = g_file_query_default_handler (file, NULL, error);
810 g_object_unref (object: file);
811 }
812
813 if (app_info)
814 {
815 GList l;
816
817 l.data = (char *)uri;
818 l.next = l.prev = NULL;
819 res = g_app_info_launch_uris (appinfo: app_info, uris: &l, launch_context, error);
820 g_object_unref (object: app_info);
821 }
822
823#ifdef G_OS_UNIX
824 if (!res && glib_should_use_portal ())
825 {
826 const char *parent_window = NULL;
827
828 /* Reset any error previously set by launch_default_for_uri */
829 g_clear_error (err: error);
830
831 if (launch_context && launch_context->priv->envp)
832 parent_window = g_environ_getenv (envp: launch_context->priv->envp, variable: "PARENT_WINDOW_ID");
833
834 return g_openuri_portal_open_uri (uri, parent_window, error);
835 }
836#endif
837
838 return res;
839}
840
841typedef struct
842{
843 gchar *uri;
844 GAppLaunchContext *context;
845} LaunchDefaultForUriData;
846
847static void
848launch_default_for_uri_data_free (LaunchDefaultForUriData *data)
849{
850 g_free (mem: data->uri);
851 g_clear_object (&data->context);
852 g_free (mem: data);
853}
854
855#ifdef G_OS_UNIX
856static void
857launch_default_for_uri_portal_open_uri_cb (GObject *object,
858 GAsyncResult *result,
859 gpointer user_data)
860{
861 GTask *task = G_TASK (user_data);
862 GError *error = NULL;
863
864 if (g_openuri_portal_open_uri_finish (result, error: &error))
865 g_task_return_boolean (task, TRUE);
866 else
867 g_task_return_error (task, g_steal_pointer (&error));
868 g_object_unref (object: task);
869}
870#endif
871
872static void
873launch_default_for_uri_portal_open_uri (GTask *task, GError *error)
874{
875#ifdef G_OS_UNIX
876 LaunchDefaultForUriData *data = g_task_get_task_data (task);
877 GCancellable *cancellable = g_task_get_cancellable (task);
878
879 if (glib_should_use_portal ())
880 {
881 const char *parent_window = NULL;
882
883 /* Reset any error previously set by launch_default_for_uri */
884 g_error_free (error);
885
886 if (data->context && data->context->priv->envp)
887 parent_window = g_environ_getenv (envp: data->context->priv->envp,
888 variable: "PARENT_WINDOW_ID");
889
890 g_openuri_portal_open_uri_async (uri: data->uri,
891 parent_window,
892 cancellable,
893 callback: launch_default_for_uri_portal_open_uri_cb,
894 g_steal_pointer (&task));
895 return;
896 }
897#endif
898
899 g_task_return_error (task, g_steal_pointer (&error));
900 g_object_unref (object: task);
901}
902
903static void
904launch_default_for_uri_launch_uris_cb (GObject *object,
905 GAsyncResult *result,
906 gpointer user_data)
907{
908 GAppInfo *app_info = G_APP_INFO (object);
909 GTask *task = G_TASK (user_data);
910 GError *error = NULL;
911
912 if (g_app_info_launch_uris_finish (appinfo: app_info, result, error: &error))
913 {
914 g_task_return_boolean (task, TRUE);
915 g_object_unref (object: task);
916 }
917 else
918 launch_default_for_uri_portal_open_uri (g_steal_pointer (&task), g_steal_pointer (&error));
919}
920
921static void
922launch_default_for_uri_launch_uris (GTask *task,
923 GAppInfo *app_info)
924{
925 GCancellable *cancellable = g_task_get_cancellable (task);
926 GList l;
927 LaunchDefaultForUriData *data = g_task_get_task_data (task);
928
929 l.data = (char *)data->uri;
930 l.next = l.prev = NULL;
931 g_app_info_launch_uris_async (appinfo: app_info,
932 uris: &l,
933 context: data->context,
934 cancellable,
935 callback: launch_default_for_uri_launch_uris_cb,
936 g_steal_pointer (&task));
937 g_object_unref (object: app_info);
938}
939
940static void
941launch_default_for_uri_default_handler_cb (GObject *object,
942 GAsyncResult *result,
943 gpointer user_data)
944{
945 GFile *file = G_FILE (object);
946 GTask *task = G_TASK (user_data);
947 GAppInfo *app_info = NULL;
948 GError *error = NULL;
949
950 app_info = g_file_query_default_handler_finish (file, result, error: &error);
951 if (app_info)
952 launch_default_for_uri_launch_uris (g_steal_pointer (&task), g_steal_pointer (&app_info));
953 else
954 launch_default_for_uri_portal_open_uri (g_steal_pointer (&task), g_steal_pointer (&error));
955}
956
957/**
958 * g_app_info_launch_default_for_uri_async:
959 * @uri: the uri to show
960 * @context: (nullable): an optional #GAppLaunchContext
961 * @cancellable: (nullable): a #GCancellable
962 * @callback: (nullable): a #GAsyncReadyCallback to call when the request is done
963 * @user_data: (nullable): data to pass to @callback
964 *
965 * Async version of g_app_info_launch_default_for_uri().
966 *
967 * This version is useful if you are interested in receiving
968 * error information in the case where the application is
969 * sandboxed and the portal may present an application chooser
970 * dialog to the user.
971 *
972 * This is also useful if you want to be sure that the D-Bus–activated
973 * applications are really started before termination and if you are interested
974 * in receiving error information from their activation.
975 *
976 * Since: 2.50
977 */
978void
979g_app_info_launch_default_for_uri_async (const char *uri,
980 GAppLaunchContext *context,
981 GCancellable *cancellable,
982 GAsyncReadyCallback callback,
983 gpointer user_data)
984{
985 GTask *task;
986 char *uri_scheme;
987 GAppInfo *app_info = NULL;
988 LaunchDefaultForUriData *data;
989
990 g_return_if_fail (uri != NULL);
991
992 task = g_task_new (NULL, cancellable, callback, callback_data: user_data);
993 g_task_set_source_tag (task, g_app_info_launch_default_for_uri_async);
994
995 data = g_new (LaunchDefaultForUriData, 1);
996 data->uri = g_strdup (str: uri);
997 data->context = (context != NULL) ? g_object_ref (context) : NULL;
998 g_task_set_task_data (task, g_steal_pointer (&data), task_data_destroy: (GDestroyNotify) launch_default_for_uri_data_free);
999
1000 /* g_file_query_default_handler_async() calls
1001 * g_app_info_get_default_for_uri_scheme() too, but we have to do it
1002 * here anyway in case GFile can't parse @uri correctly.
1003 */
1004 uri_scheme = g_uri_parse_scheme (uri);
1005 if (uri_scheme && uri_scheme[0] != '\0')
1006 /* FIXME: The following still uses blocking calls. */
1007 app_info = g_app_info_get_default_for_uri_scheme (uri_scheme);
1008 g_free (mem: uri_scheme);
1009
1010 if (!app_info)
1011 {
1012 GFile *file;
1013
1014 file = g_file_new_for_uri (uri);
1015 g_file_query_default_handler_async (file,
1016 G_PRIORITY_DEFAULT,
1017 cancellable,
1018 callback: launch_default_for_uri_default_handler_cb,
1019 g_steal_pointer (&task));
1020 g_object_unref (object: file);
1021 }
1022 else
1023 launch_default_for_uri_launch_uris (g_steal_pointer (&task), g_steal_pointer (&app_info));
1024}
1025
1026/**
1027 * g_app_info_launch_default_for_uri_finish:
1028 * @result: a #GAsyncResult
1029 * @error: (nullable): return location for an error, or %NULL
1030 *
1031 * Finishes an asynchronous launch-default-for-uri operation.
1032 *
1033 * Returns: %TRUE if the launch was successful, %FALSE if @error is set
1034 *
1035 * Since: 2.50
1036 */
1037gboolean
1038g_app_info_launch_default_for_uri_finish (GAsyncResult *result,
1039 GError **error)
1040{
1041 g_return_val_if_fail (g_task_is_valid (result, NULL), FALSE);
1042
1043 return g_task_propagate_boolean (G_TASK (result), error);
1044}
1045
1046/**
1047 * g_app_info_can_delete:
1048 * @appinfo: a #GAppInfo
1049 *
1050 * Obtains the information whether the #GAppInfo can be deleted.
1051 * See g_app_info_delete().
1052 *
1053 * Returns: %TRUE if @appinfo can be deleted
1054 *
1055 * Since: 2.20
1056 */
1057gboolean
1058g_app_info_can_delete (GAppInfo *appinfo)
1059{
1060 GAppInfoIface *iface;
1061
1062 g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
1063
1064 iface = G_APP_INFO_GET_IFACE (appinfo);
1065
1066 if (iface->can_delete)
1067 return (* iface->can_delete) (appinfo);
1068
1069 return FALSE;
1070}
1071
1072
1073/**
1074 * g_app_info_delete:
1075 * @appinfo: a #GAppInfo
1076 *
1077 * Tries to delete a #GAppInfo.
1078 *
1079 * On some platforms, there may be a difference between user-defined
1080 * #GAppInfos which can be deleted, and system-wide ones which cannot.
1081 * See g_app_info_can_delete().
1082 *
1083 * Virtual: do_delete
1084 * Returns: %TRUE if @appinfo has been deleted
1085 *
1086 * Since: 2.20
1087 */
1088gboolean
1089g_app_info_delete (GAppInfo *appinfo)
1090{
1091 GAppInfoIface *iface;
1092
1093 g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
1094
1095 iface = G_APP_INFO_GET_IFACE (appinfo);
1096
1097 if (iface->do_delete)
1098 return (* iface->do_delete) (appinfo);
1099
1100 return FALSE;
1101}
1102
1103
1104enum {
1105 LAUNCH_FAILED,
1106 LAUNCHED,
1107 LAST_SIGNAL
1108};
1109
1110static guint signals[LAST_SIGNAL] = { 0 };
1111
1112G_DEFINE_TYPE_WITH_PRIVATE (GAppLaunchContext, g_app_launch_context, G_TYPE_OBJECT)
1113
1114/**
1115 * g_app_launch_context_new:
1116 *
1117 * Creates a new application launch context. This is not normally used,
1118 * instead you instantiate a subclass of this, such as #GdkAppLaunchContext.
1119 *
1120 * Returns: a #GAppLaunchContext.
1121 **/
1122GAppLaunchContext *
1123g_app_launch_context_new (void)
1124{
1125 return g_object_new (G_TYPE_APP_LAUNCH_CONTEXT, NULL);
1126}
1127
1128static void
1129g_app_launch_context_finalize (GObject *object)
1130{
1131 GAppLaunchContext *context = G_APP_LAUNCH_CONTEXT (object);
1132
1133 g_strfreev (str_array: context->priv->envp);
1134
1135 G_OBJECT_CLASS (g_app_launch_context_parent_class)->finalize (object);
1136}
1137
1138static void
1139g_app_launch_context_class_init (GAppLaunchContextClass *klass)
1140{
1141 GObjectClass *object_class = G_OBJECT_CLASS (klass);
1142
1143 object_class->finalize = g_app_launch_context_finalize;
1144
1145 /**
1146 * GAppLaunchContext::launch-failed:
1147 * @context: the object emitting the signal
1148 * @startup_notify_id: the startup notification id for the failed launch
1149 *
1150 * The ::launch-failed signal is emitted when a #GAppInfo launch
1151 * fails. The startup notification id is provided, so that the launcher
1152 * can cancel the startup notification.
1153 *
1154 * Since: 2.36
1155 */
1156 signals[LAUNCH_FAILED] = g_signal_new (I_("launch-failed"),
1157 G_OBJECT_CLASS_TYPE (object_class),
1158 signal_flags: G_SIGNAL_RUN_LAST,
1159 G_STRUCT_OFFSET (GAppLaunchContextClass, launch_failed),
1160 NULL, NULL, NULL,
1161 G_TYPE_NONE, n_params: 1, G_TYPE_STRING);
1162
1163 /**
1164 * GAppLaunchContext::launched:
1165 * @context: the object emitting the signal
1166 * @info: the #GAppInfo that was just launched
1167 * @platform_data: additional platform-specific data for this launch
1168 *
1169 * The ::launched signal is emitted when a #GAppInfo is successfully
1170 * launched. The @platform_data is an GVariant dictionary mapping
1171 * strings to variants (ie a{sv}), which contains additional,
1172 * platform-specific data about this launch. On UNIX, at least the
1173 * "pid" and "startup-notification-id" keys will be present.
1174 *
1175 * Since: 2.36
1176 */
1177 signals[LAUNCHED] = g_signal_new (I_("launched"),
1178 G_OBJECT_CLASS_TYPE (object_class),
1179 signal_flags: G_SIGNAL_RUN_LAST,
1180 G_STRUCT_OFFSET (GAppLaunchContextClass, launched),
1181 NULL, NULL,
1182 c_marshaller: _g_cclosure_marshal_VOID__OBJECT_VARIANT,
1183 G_TYPE_NONE, n_params: 2,
1184 G_TYPE_APP_INFO, G_TYPE_VARIANT);
1185 g_signal_set_va_marshaller (signal_id: signals[LAUNCHED],
1186 G_TYPE_FROM_CLASS (klass),
1187 va_marshaller: _g_cclosure_marshal_VOID__OBJECT_VARIANTv);
1188}
1189
1190static void
1191g_app_launch_context_init (GAppLaunchContext *context)
1192{
1193 context->priv = g_app_launch_context_get_instance_private (self: context);
1194}
1195
1196/**
1197 * g_app_launch_context_setenv:
1198 * @context: a #GAppLaunchContext
1199 * @variable: (type filename): the environment variable to set
1200 * @value: (type filename): the value for to set the variable to.
1201 *
1202 * Arranges for @variable to be set to @value in the child's
1203 * environment when @context is used to launch an application.
1204 *
1205 * Since: 2.32
1206 */
1207void
1208g_app_launch_context_setenv (GAppLaunchContext *context,
1209 const char *variable,
1210 const char *value)
1211{
1212 g_return_if_fail (G_IS_APP_LAUNCH_CONTEXT (context));
1213 g_return_if_fail (variable != NULL);
1214 g_return_if_fail (value != NULL);
1215
1216 if (!context->priv->envp)
1217 context->priv->envp = g_get_environ ();
1218
1219 context->priv->envp =
1220 g_environ_setenv (envp: context->priv->envp, variable, value, TRUE);
1221}
1222
1223/**
1224 * g_app_launch_context_unsetenv:
1225 * @context: a #GAppLaunchContext
1226 * @variable: (type filename): the environment variable to remove
1227 *
1228 * Arranges for @variable to be unset in the child's environment
1229 * when @context is used to launch an application.
1230 *
1231 * Since: 2.32
1232 */
1233void
1234g_app_launch_context_unsetenv (GAppLaunchContext *context,
1235 const char *variable)
1236{
1237 g_return_if_fail (G_IS_APP_LAUNCH_CONTEXT (context));
1238 g_return_if_fail (variable != NULL);
1239
1240 if (!context->priv->envp)
1241 context->priv->envp = g_get_environ ();
1242
1243 context->priv->envp =
1244 g_environ_unsetenv (envp: context->priv->envp, variable);
1245}
1246
1247/**
1248 * g_app_launch_context_get_environment:
1249 * @context: a #GAppLaunchContext
1250 *
1251 * Gets the complete environment variable list to be passed to
1252 * the child process when @context is used to launch an application.
1253 * This is a %NULL-terminated array of strings, where each string has
1254 * the form `KEY=VALUE`.
1255 *
1256 * Returns: (array zero-terminated=1) (element-type filename) (transfer full):
1257 * the child's environment
1258 *
1259 * Since: 2.32
1260 */
1261char **
1262g_app_launch_context_get_environment (GAppLaunchContext *context)
1263{
1264 g_return_val_if_fail (G_IS_APP_LAUNCH_CONTEXT (context), NULL);
1265
1266 if (!context->priv->envp)
1267 context->priv->envp = g_get_environ ();
1268
1269 return g_strdupv (str_array: context->priv->envp);
1270}
1271
1272/**
1273 * g_app_launch_context_get_display:
1274 * @context: a #GAppLaunchContext
1275 * @info: a #GAppInfo
1276 * @files: (element-type GFile): a #GList of #GFile objects
1277 *
1278 * Gets the display string for the @context. This is used to ensure new
1279 * applications are started on the same display as the launching
1280 * application, by setting the `DISPLAY` environment variable.
1281 *
1282 * Returns: (nullable): a display string for the display.
1283 */
1284char *
1285g_app_launch_context_get_display (GAppLaunchContext *context,
1286 GAppInfo *info,
1287 GList *files)
1288{
1289 GAppLaunchContextClass *class;
1290
1291 g_return_val_if_fail (G_IS_APP_LAUNCH_CONTEXT (context), NULL);
1292 g_return_val_if_fail (G_IS_APP_INFO (info), NULL);
1293
1294 class = G_APP_LAUNCH_CONTEXT_GET_CLASS (context);
1295
1296 if (class->get_display == NULL)
1297 return NULL;
1298
1299 return class->get_display (context, info, files);
1300}
1301
1302/**
1303 * g_app_launch_context_get_startup_notify_id:
1304 * @context: a #GAppLaunchContext
1305 * @info: a #GAppInfo
1306 * @files: (element-type GFile): a #GList of of #GFile objects
1307 *
1308 * Initiates startup notification for the application and returns the
1309 * `DESKTOP_STARTUP_ID` for the launched operation, if supported.
1310 *
1311 * Startup notification IDs are defined in the
1312 * [FreeDesktop.Org Startup Notifications standard](http://standards.freedesktop.org/startup-notification-spec/startup-notification-latest.txt).
1313 *
1314 * Returns: (nullable): a startup notification ID for the application, or %NULL if
1315 * not supported.
1316 **/
1317char *
1318g_app_launch_context_get_startup_notify_id (GAppLaunchContext *context,
1319 GAppInfo *info,
1320 GList *files)
1321{
1322 GAppLaunchContextClass *class;
1323
1324 g_return_val_if_fail (G_IS_APP_LAUNCH_CONTEXT (context), NULL);
1325 g_return_val_if_fail (G_IS_APP_INFO (info), NULL);
1326
1327 class = G_APP_LAUNCH_CONTEXT_GET_CLASS (context);
1328
1329 if (class->get_startup_notify_id == NULL)
1330 return NULL;
1331
1332 return class->get_startup_notify_id (context, info, files);
1333}
1334
1335
1336/**
1337 * g_app_launch_context_launch_failed:
1338 * @context: a #GAppLaunchContext.
1339 * @startup_notify_id: the startup notification id that was returned by g_app_launch_context_get_startup_notify_id().
1340 *
1341 * Called when an application has failed to launch, so that it can cancel
1342 * the application startup notification started in g_app_launch_context_get_startup_notify_id().
1343 *
1344 **/
1345void
1346g_app_launch_context_launch_failed (GAppLaunchContext *context,
1347 const char *startup_notify_id)
1348{
1349 g_return_if_fail (G_IS_APP_LAUNCH_CONTEXT (context));
1350 g_return_if_fail (startup_notify_id != NULL);
1351
1352 g_signal_emit (instance: context, signal_id: signals[LAUNCH_FAILED], detail: 0, startup_notify_id);
1353}
1354
1355
1356/**
1357 * SECTION:gappinfomonitor
1358 * @short_description: Monitor application information for changes
1359 *
1360 * #GAppInfoMonitor is a very simple object used for monitoring the app
1361 * info database for changes (ie: newly installed or removed
1362 * applications).
1363 *
1364 * Call g_app_info_monitor_get() to get a #GAppInfoMonitor and connect
1365 * to the "changed" signal.
1366 *
1367 * In the usual case, applications should try to make note of the change
1368 * (doing things like invalidating caches) but not act on it. In
1369 * particular, applications should avoid making calls to #GAppInfo APIs
1370 * in response to the change signal, deferring these until the time that
1371 * the data is actually required. The exception to this case is when
1372 * application information is actually being displayed on the screen
1373 * (eg: during a search or when the list of all applications is shown).
1374 * The reason for this is that changes to the list of installed
1375 * applications often come in groups (like during system updates) and
1376 * rescanning the list on every change is pointless and expensive.
1377 *
1378 * Since: 2.40
1379 **/
1380
1381/**
1382 * GAppInfoMonitor:
1383 *
1384 * The only thing you can do with this is to get it via
1385 * g_app_info_monitor_get() and connect to the "changed" signal.
1386 *
1387 * Since: 2.40
1388 **/
1389
1390typedef struct _GAppInfoMonitorClass GAppInfoMonitorClass;
1391
1392struct _GAppInfoMonitor
1393{
1394 GObject parent_instance;
1395 GMainContext *context;
1396};
1397
1398struct _GAppInfoMonitorClass
1399{
1400 GObjectClass parent_class;
1401};
1402
1403static GContextSpecificGroup g_app_info_monitor_group;
1404static guint g_app_info_monitor_changed_signal;
1405
1406G_DEFINE_TYPE (GAppInfoMonitor, g_app_info_monitor, G_TYPE_OBJECT)
1407
1408static void
1409g_app_info_monitor_finalize (GObject *object)
1410{
1411 GAppInfoMonitor *monitor = G_APP_INFO_MONITOR (object);
1412
1413 g_context_specific_group_remove (group: &g_app_info_monitor_group, context: monitor->context, instance: monitor, NULL);
1414
1415 G_OBJECT_CLASS (g_app_info_monitor_parent_class)->finalize (object);
1416}
1417
1418static void
1419g_app_info_monitor_init (GAppInfoMonitor *monitor)
1420{
1421}
1422
1423static void
1424g_app_info_monitor_class_init (GAppInfoMonitorClass *class)
1425{
1426 GObjectClass *object_class = G_OBJECT_CLASS (class);
1427
1428 /**
1429 * GAppInfoMonitor::changed:
1430 *
1431 * Signal emitted when the app info database for changes (ie: newly installed
1432 * or removed applications).
1433 **/
1434 g_app_info_monitor_changed_signal = g_signal_new (I_("changed"), G_TYPE_APP_INFO_MONITOR, signal_flags: G_SIGNAL_RUN_FIRST,
1435 class_offset: 0, NULL, NULL, c_marshaller: g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, n_params: 0);
1436
1437 object_class->finalize = g_app_info_monitor_finalize;
1438}
1439
1440/**
1441 * g_app_info_monitor_get:
1442 *
1443 * Gets the #GAppInfoMonitor for the current thread-default main
1444 * context.
1445 *
1446 * The #GAppInfoMonitor will emit a "changed" signal in the
1447 * thread-default main context whenever the list of installed
1448 * applications (as reported by g_app_info_get_all()) may have changed.
1449 *
1450 * You must only call g_object_unref() on the return value from under
1451 * the same main context as you created it.
1452 *
1453 * Returns: (transfer full): a reference to a #GAppInfoMonitor
1454 *
1455 * Since: 2.40
1456 **/
1457GAppInfoMonitor *
1458g_app_info_monitor_get (void)
1459{
1460 return g_context_specific_group_get (group: &g_app_info_monitor_group,
1461 G_TYPE_APP_INFO_MONITOR,
1462 G_STRUCT_OFFSET (GAppInfoMonitor, context),
1463 NULL);
1464}
1465
1466void
1467g_app_info_monitor_fire (void)
1468{
1469 g_context_specific_group_emit (group: &g_app_info_monitor_group, signal_id: g_app_info_monitor_changed_signal);
1470}
1471

source code of gtk/subprojects/glib/gio/gappinfo.c