clapper-app: Allow usage of all reactable enhancers

Enable and use all found enhancer plugins on the system
clapper: Add ability to enable/disable creation of given enhancer
2025-09-21 18:42:01 +02:00 · 2025-06-22 13:36:09 +02:00 · 2025-06-22 13:35:57 +02:00 · 2025-06-19 12:43:50 +02:00 · 2025-06-14 11:35:04 -04:00 · 2025-06-14 11:35:02 -04:00
170 changed files with 1840 additions and 622 deletions
--- a/31
+++ b/31
@@ -2,7 +2,7 @@
                       Version 2.1, February 1999

 Copyright (C) 1991, 1999 Free Software Foundation, Inc.
- 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ <https://fsf.org/>
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

@@ -55,7 +55,7 @@ modified by someone else and passed on, the recipients should know
 that what they have is not the original version, so that the original
 author's reputation will not be affected by problems that might be
 introduced by others.
-
+
  Finally, software patents pose a constant threat to the existence of
 any free program.  We wish to make sure that a company cannot
 effectively restrict the users of a free program by obtaining a
@@ -111,7 +111,7 @@ modification follow.  Pay close attention to the difference between a
 "work based on the library" and a "work that uses the library".  The
 former contains code derived from the library, whereas the latter must
 be combined with the library in order to run.
-
+
                  GNU LESSER GENERAL PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

@@ -158,7 +158,7 @@ Library.
  You may charge a fee for the physical act of transferring a copy,
 and you may at your option offer warranty protection in exchange for a
 fee.
-
+
  2. You may modify your copy or copies of the Library or any portion
 of it, thus forming a work based on the Library, and copy and
 distribute such modifications or work under the terms of Section 1
@@ -216,7 +216,7 @@ instead of to this License.  (If a newer version than version 2 of the
 ordinary GNU General Public License has appeared, then you can specify
 that version instead if you wish.)  Do not make any other change in
 these notices.
-
+
  Once this change is made in a given copy, it is irreversible for
 that copy, so the ordinary GNU General Public License applies to all
 subsequent copies and derivative works made from that copy.
@@ -267,7 +267,7 @@ Library will still fall under Section 6.)
 distribute the object code for the work under the terms of Section 6.
 Any executables containing that work also fall under Section 6,
 whether or not they are linked directly with the Library itself.
-
+
  6. As an exception to the Sections above, you may also combine or
 link a "work that uses the Library" with the Library to produce a
 work containing portions of the Library, and distribute that work
@@ -329,7 +329,7 @@ restrictions of other proprietary libraries that do not normally
 accompany the operating system.  Such a contradiction means you cannot
 use both them and the Library together in an executable that you
 distribute.
-
+
  7. You may place library facilities that are a work based on the
 Library side-by-side in a single library together with other library
 facilities not covered by this License, and distribute such a combined
@@ -370,7 +370,7 @@ subject to these terms and conditions.  You may not impose any further
 restrictions on the recipients' exercise of the rights granted herein.
 You are not responsible for enforcing compliance by third parties with
 this License.
-
+
  11. If, as a consequence of a court judgment or allegation of patent
 infringement or for any other reason (not limited to patent issues),
 conditions are imposed on you (whether by court order, agreement or
@@ -422,7 +422,7 @@ conditions either of that version or of any later version published by
 the Free Software Foundation.  If the Library does not specify a
 license version number, you may choose any version ever published by
 the Free Software Foundation.
-
+
  14. If you wish to incorporate parts of the Library into other free
 programs whose distribution conditions are incompatible with these,
 write to the author to ask for permission.  For software which is
@@ -456,7 +456,7 @@ SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
 DAMAGES.

                     END OF TERMS AND CONDITIONS
-
+
           How to Apply These Terms to Your New Libraries

  If you develop a new library, and you want it to be of the greatest
@@ -484,9 +484,7 @@ convey the exclusion of warranty; and each file should have at least the
    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, write to the Free Software
-    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
-    USA
+    License along with this library; if not, see <https://www.gnu.org/licenses/>.

 Also add information on how to contact you by electronic and paper mail.

@@ -495,10 +493,9 @@ school, if any, to sign a "copyright disclaimer" for the library, if
 necessary.  Here is a sample; alter the names:

  Yoyodyne, Inc., hereby disclaims all copyright interest in the
-  library `Frob' (a library for tweaking knobs) written by James Random
-  Hacker.
+  library `Frob' (a library for tweaking knobs) written by James Random Hacker.

-  <signature of Ty Coon>, 1 April 1990
-  Ty Coon, President of Vice
+  <signature of Moe Ghoul>, 1 April 1990
+  Moe Ghoul, President of Vice

 That's all there is to it!
--- a/src/bin/clapper-app/clapper-app-window.c
+++ b/src/bin/clapper-app/clapper-app-window.c
@@ -86,9 +86,7 @@ typedef struct
  gint64 last_tick;
 } ClapperAppWindowResizeData;

-#if CLAPPER_HAVE_MPRIS
 static guint16 instance_count = 0;
-#endif

 static inline GQuark
 clapper_app_window_extra_options_get_quark (void)
@@ -1252,16 +1250,28 @@ clapper_app_window_constructed (GObject *object)
 #if (CLAPPER_HAVE_MPRIS || CLAPPER_HAVE_SERVER || CLAPPER_HAVE_DISCOVERER)
  ClapperFeature *feature = NULL;
 #endif
-#if CLAPPER_HAVE_MPRIS
+#if (!CLAPPER_HAVE_MPRIS || !CLAPPER_HAVE_SERVER || !CLAPPER_HAVE_DISCOVERER)
+  ClapperEnhancerProxyList *proxies = clapper_player_get_enhancer_proxies (player);
+  ClapperEnhancerProxy *proxy;
+#endif
+
  gchar mpris_name[45];
  g_snprintf (mpris_name, sizeof (mpris_name),
      "org.mpris.MediaPlayer2.Clapper.instance%" G_GUINT16_FORMAT, instance_count++);
-#endif

  self->settings = g_settings_new (CLAPPER_APP_ID);
  self->last_volume = PERCENTAGE_ROUND (g_settings_get_double (self->settings, "volume"));

-#if CLAPPER_HAVE_MPRIS
+#if !CLAPPER_HAVE_MPRIS
+  if ((proxy = clapper_enhancer_proxy_list_get_proxy_by_module (proxies, "clapper-mpris"))) {
+    clapper_enhancer_proxy_set_locally (proxy,
+        "own-name", mpris_name,
+        "identity", CLAPPER_APP_NAME,
+        "desktop-entry", CLAPPER_APP_ID,
+        "queue-controllable", TRUE, NULL);
+    gst_object_unref (proxy);
+  }
+#else
  feature = CLAPPER_FEATURE (clapper_mpris_new (
      mpris_name, CLAPPER_APP_NAME, CLAPPER_APP_ID));
  clapper_mpris_set_queue_controllable (CLAPPER_MPRIS (feature), TRUE);
--- a/src/bin/clapper-app/main.c
+++ b/src/bin/clapper-app/main.c
@@ -31,8 +31,10 @@
 gint
 main (gint argc, gchar **argv)
 {
-  const gchar *clapper_ldir;
  GApplication *application;
+  ClapperEnhancerProxyList *proxies;
+  const gchar *clapper_ldir;
+  guint i, n_proxies;
  gint status;

 #ifdef G_OS_WIN32
@@ -64,6 +66,15 @@ main (gint argc, gchar **argv)
  resolution = clapper_app_utils_win_hi_res_clock_start ();
 #endif

+  proxies = clapper_get_global_enhancer_proxies ();
+  n_proxies = clapper_enhancer_proxy_list_get_n_proxies (proxies);
+
+  /* Allow usage of all enhancers */
+  for (i = 0; i < n_proxies; ++i) {
+    ClapperEnhancerProxy *proxy = clapper_enhancer_proxy_list_peek_proxy (proxies, i);
+    clapper_enhancer_proxy_set_target_creation_allowed (proxy, TRUE);
+  }
+
  application = clapper_app_application_new ();

  status = g_application_run (application, argc, argv);
--- a/src/lib/clapper-gtk/clapper-gtk-billboard.c
+++ b/src/lib/clapper-gtk/clapper-gtk-billboard.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 /**
--- a/src/lib/clapper-gtk/clapper-gtk-billboard.h
+++ b/src/lib/clapper-gtk/clapper-gtk-billboard.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk-buffering-animation-private.h
+++ b/src/lib/clapper-gtk/clapper-gtk-buffering-animation-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk-buffering-animation.c
+++ b/src/lib/clapper-gtk/clapper-gtk-buffering-animation.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #include <clapper/clapper.h>
--- a/src/lib/clapper-gtk/clapper-gtk-buffering-paintable-private.h
+++ b/src/lib/clapper-gtk/clapper-gtk-buffering-paintable-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk-buffering-paintable.c
+++ b/src/lib/clapper-gtk/clapper-gtk-buffering-paintable.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #include "clapper-gtk-buffering-paintable-private.h"
--- a/src/lib/clapper-gtk/clapper-gtk-container-private.h
+++ b/src/lib/clapper-gtk/clapper-gtk-container-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk-container.c
+++ b/src/lib/clapper-gtk/clapper-gtk-container.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 /**
--- a/src/lib/clapper-gtk/clapper-gtk-container.h
+++ b/src/lib/clapper-gtk/clapper-gtk-container.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk-enums.h
+++ b/src/lib/clapper-gtk/clapper-gtk-enums.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk-extra-menu-button.c
+++ b/src/lib/clapper-gtk/clapper-gtk-extra-menu-button.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 /**
--- a/src/lib/clapper-gtk/clapper-gtk-extra-menu-button.h
+++ b/src/lib/clapper-gtk/clapper-gtk-extra-menu-button.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk-lead-container.c
+++ b/src/lib/clapper-gtk/clapper-gtk-lead-container.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 /**
--- a/src/lib/clapper-gtk/clapper-gtk-lead-container.h
+++ b/src/lib/clapper-gtk/clapper-gtk-lead-container.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk-limited-layout-private.h
+++ b/src/lib/clapper-gtk/clapper-gtk-limited-layout-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk-limited-layout.c
+++ b/src/lib/clapper-gtk/clapper-gtk-limited-layout.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #include <clapper/clapper.h>
--- a/src/lib/clapper-gtk/clapper-gtk-next-item-button.c
+++ b/src/lib/clapper-gtk/clapper-gtk-next-item-button.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 /**
--- a/src/lib/clapper-gtk/clapper-gtk-next-item-button.h
+++ b/src/lib/clapper-gtk/clapper-gtk-next-item-button.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk-previous-item-button.c
+++ b/src/lib/clapper-gtk/clapper-gtk-previous-item-button.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 /**
--- a/src/lib/clapper-gtk/clapper-gtk-previous-item-button.h
+++ b/src/lib/clapper-gtk/clapper-gtk-previous-item-button.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk-seek-bar.c
+++ b/src/lib/clapper-gtk/clapper-gtk-seek-bar.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 /**
--- a/src/lib/clapper-gtk/clapper-gtk-seek-bar.h
+++ b/src/lib/clapper-gtk/clapper-gtk-seek-bar.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk-simple-controls.c
+++ b/src/lib/clapper-gtk/clapper-gtk-simple-controls.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 /**
--- a/src/lib/clapper-gtk/clapper-gtk-simple-controls.h
+++ b/src/lib/clapper-gtk/clapper-gtk-simple-controls.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk-status-private.h
+++ b/src/lib/clapper-gtk/clapper-gtk-status-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk-status.c
+++ b/src/lib/clapper-gtk/clapper-gtk-status.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #include "config.h"
--- a/src/lib/clapper-gtk/clapper-gtk-stream-check-button-private.h
+++ b/src/lib/clapper-gtk/clapper-gtk-stream-check-button-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk-stream-check-button.c
+++ b/src/lib/clapper-gtk/clapper-gtk-stream-check-button.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #include "config.h"
--- a/src/lib/clapper-gtk/clapper-gtk-title-header.c
+++ b/src/lib/clapper-gtk/clapper-gtk-title-header.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 /**
--- a/src/lib/clapper-gtk/clapper-gtk-title-header.h
+++ b/src/lib/clapper-gtk/clapper-gtk-title-header.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk-title-label.c
+++ b/src/lib/clapper-gtk/clapper-gtk-title-label.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 /**
--- a/src/lib/clapper-gtk/clapper-gtk-title-label.h
+++ b/src/lib/clapper-gtk/clapper-gtk-title-label.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk-toggle-fullscreen-button.c
+++ b/src/lib/clapper-gtk/clapper-gtk-toggle-fullscreen-button.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 /**
--- a/src/lib/clapper-gtk/clapper-gtk-toggle-fullscreen-button.h
+++ b/src/lib/clapper-gtk/clapper-gtk-toggle-fullscreen-button.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk-toggle-play-button.c
+++ b/src/lib/clapper-gtk/clapper-gtk-toggle-play-button.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 /**
--- a/src/lib/clapper-gtk/clapper-gtk-toggle-play-button.h
+++ b/src/lib/clapper-gtk/clapper-gtk-toggle-play-button.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk-utils-private.h
+++ b/src/lib/clapper-gtk/clapper-gtk-utils-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk-utils.c
+++ b/src/lib/clapper-gtk/clapper-gtk-utils.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #include "config.h"
--- a/src/lib/clapper-gtk/clapper-gtk-utils.h
+++ b/src/lib/clapper-gtk/clapper-gtk-utils.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk-version.h.in
+++ b/src/lib/clapper-gtk/clapper-gtk-version.h.in
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk-video-placeholder-private.h
+++ b/src/lib/clapper-gtk/clapper-gtk-video-placeholder-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk-video-placeholder.c
+++ b/src/lib/clapper-gtk/clapper-gtk-video-placeholder.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #include "config.h"
--- a/src/lib/clapper-gtk/clapper-gtk-video.c
+++ b/src/lib/clapper-gtk/clapper-gtk-video.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 /**
--- a/src/lib/clapper-gtk/clapper-gtk-video.h
+++ b/src/lib/clapper-gtk/clapper-gtk-video.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper-gtk/clapper-gtk.h
+++ b/src/lib/clapper-gtk/clapper-gtk.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-app-bus-private.h
+++ b/src/lib/clapper/clapper-app-bus-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-app-bus.c
+++ b/src/lib/clapper/clapper-app-bus.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #include <gio/gio.h>
--- a/src/lib/clapper/clapper-audio-stream-private.h
+++ b/src/lib/clapper/clapper-audio-stream-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-audio-stream.c
+++ b/src/lib/clapper/clapper-audio-stream.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 /**
--- a/src/lib/clapper/clapper-audio-stream.h
+++ b/src/lib/clapper/clapper-audio-stream.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-basic-functions.c
+++ b/src/lib/clapper/clapper-basic-functions.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #include "config.h"
@@ -29,6 +28,7 @@
 #include "clapper-app-bus-private.h"
 #include "clapper-features-bus-private.h"
 #include "clapper-enhancer-proxy-list-private.h"
+#include "clapper-reactables-manager-private.h"
 #include "gst/clapper-plugin-private.h"

 #include "clapper-functionalities-availability.h"
@@ -56,6 +56,7 @@ clapper_init_check_internal (int *argc, char **argv[])
  clapper_playbin_bus_initialize ();
  clapper_app_bus_initialize ();
  clapper_features_bus_initialize ();
+  clapper_reactables_manager_initialize ();

  _proxies = clapper_enhancer_proxy_list_new_named ("global-proxy-list");

--- a/src/lib/clapper/clapper-basic-functions.h
+++ b/src/lib/clapper/clapper-basic-functions.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-bus-private.h
+++ b/src/lib/clapper/clapper-bus-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-cache-private.h
+++ b/src/lib/clapper/clapper-cache-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-cache.c
+++ b/src/lib/clapper/clapper-cache.c
@@ -12,20 +12,21 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #include "clapper-cache-private.h"
 #include "clapper-version.h"
 #include "clapper-extractable.h"
+#include "clapper-reactable.h"

 #define CLAPPER_CACHE_HEADER "CLAPPER"

 typedef enum
 {
  CLAPPER_CACHE_IFACE_EXTRACTABLE = 1,
+  CLAPPER_CACHE_IFACE_REACTABLE,
 } ClapperCacheIfaces;

 static GArray *enum_registry = NULL;
@@ -243,6 +244,8 @@ clapper_cache_read_iface (const gchar **data)
  switch (iface_id) {
    case CLAPPER_CACHE_IFACE_EXTRACTABLE:
      return CLAPPER_TYPE_EXTRACTABLE;
+    case CLAPPER_CACHE_IFACE_REACTABLE:
+      return CLAPPER_TYPE_REACTABLE;
    default:
      return 0;
  }
@@ -433,6 +436,8 @@ clapper_cache_store_iface (GByteArray *bytes, GType iface)

  if (iface == CLAPPER_TYPE_EXTRACTABLE)
    iface_id = CLAPPER_CACHE_IFACE_EXTRACTABLE;
+  else if (iface == CLAPPER_TYPE_REACTABLE)
+    iface_id = CLAPPER_CACHE_IFACE_REACTABLE;
  else
    return FALSE;

--- a/src/lib/clapper/clapper-enhancer-proxy-list-private.h
+++ b/src/lib/clapper/clapper-enhancer-proxy-list-private.h
@@ -12,14 +12,14 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once

 #include <glib.h>
+#include <glib-object.h>

 #include "clapper-enhancer-proxy-list.h"
 #include "clapper-enhancer-proxy.h"
@@ -38,4 +38,7 @@ void clapper_enhancer_proxy_list_fill_from_global_proxies (ClapperEnhancerProxyL
 G_GNUC_INTERNAL
 void clapper_enhancer_proxy_list_sort (ClapperEnhancerProxyList *list);

+G_GNUC_INTERNAL
+gboolean clapper_enhancer_proxy_list_has_proxy_with_interface (ClapperEnhancerProxyList *list, GType iface_type);
+
 G_END_DECLS
--- a/src/lib/clapper/clapper-enhancer-proxy-list.c
+++ b/src/lib/clapper/clapper-enhancer-proxy-list.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 /**
@@ -161,6 +160,29 @@ clapper_enhancer_proxy_list_sort (ClapperEnhancerProxyList *self)
  g_ptr_array_sort_values (self->proxies, (GCompareFunc) _sort_values_by_name);
 }

+/*
+ * clapper_enhancer_proxy_list_has_proxy_with_interface:
+ * @iface_type: an interface #GType
+ *
+ * Check if any enhancer implementing given interface type is available.
+ *
+ * Returns: whether any enhancer proxy was found.
+ */
+gboolean
+clapper_enhancer_proxy_list_has_proxy_with_interface (ClapperEnhancerProxyList *self, GType iface_type)
+{
+  guint i;
+
+  for (i = 0; i < self->proxies->len; ++i) {
+    ClapperEnhancerProxy *proxy = clapper_enhancer_proxy_list_peek_proxy (self, i);
+
+    if (clapper_enhancer_proxy_target_has_interface (proxy, iface_type))
+      return TRUE;
+  }
+
+  return FALSE;
+}
+
 /**
 * clapper_enhancer_proxy_list_get_proxy:
 * @list: a #ClapperEnhancerProxyList
--- a/src/lib/clapper/clapper-enhancer-proxy-list.h
+++ b/src/lib/clapper/clapper-enhancer-proxy-list.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-enhancer-proxy-private.h
+++ b/src/lib/clapper/clapper-enhancer-proxy-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
@@ -45,6 +44,9 @@ void clapper_enhancer_proxy_export_to_cache (ClapperEnhancerProxy *proxy);
 G_GNUC_INTERNAL
 GObject * clapper_enhancer_proxy_get_peas_info (ClapperEnhancerProxy *proxy);

+G_GNUC_INTERNAL
+gboolean clapper_enhancer_proxy_has_locally_set (ClapperEnhancerProxy *proxy, const gchar *property_name);
+
 G_GNUC_INTERNAL
 GstStructure * clapper_enhancer_proxy_make_current_config (ClapperEnhancerProxy *proxy);

--- a/src/lib/clapper/clapper-enhancer-proxy.c
+++ b/src/lib/clapper/clapper-enhancer-proxy.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 /**
@@ -48,6 +47,9 @@
 #include "clapper-basic-functions.h"
 #include "clapper-cache-private.h"
 #include "clapper-extractable.h"
+#include "clapper-reactable.h"
+#include "clapper-player-private.h"
+#include "clapper-utils-private.h"
 #include "clapper-enums.h"

 #include "clapper-functionalities-availability.h"
@@ -84,6 +86,8 @@ struct _ClapperEnhancerProxy
  ClapperEnhancerParamFlags scope;
  GstStructure *local_config;

+  gboolean allowed;
+
  /* GSettings are not thread-safe,
   * so store schema instead */
  GSettingsSchema *schema;
@@ -98,6 +102,7 @@ enum
  PROP_MODULE_DIR,
  PROP_DESCRIPTION,
  PROP_VERSION,
+  PROP_TARGET_CREATION_ALLOWED,
  PROP_LAST
 };

@@ -227,6 +232,8 @@ clapper_enhancer_proxy_copy (ClapperEnhancerProxy *src_proxy, const gchar *copy_
  if (src_proxy->local_config)
    copy->local_config = gst_structure_copy (src_proxy->local_config);

+  copy->allowed = src_proxy->allowed;
+
  GST_OBJECT_UNLOCK (src_proxy);

  gst_object_ref_sink (copy);
@@ -357,6 +364,8 @@ clapper_enhancer_proxy_fill_from_cache (ClapperEnhancerProxy *self)
      if (G_UNLIKELY ((self->ifaces[i] = clapper_cache_read_iface (&data)) == 0))
        goto abort_reading;
    }
+    /* Reactable type is always last */
+    self->allowed = (self->ifaces[self->n_ifaces - 1] != CLAPPER_TYPE_REACTABLE);
  }

  /* Restore ParamSpecs */
@@ -454,7 +463,8 @@ clapper_enhancer_proxy_export_to_cache (ClapperEnhancerProxy *self)
 gboolean
 clapper_enhancer_proxy_fill_from_instance (ClapperEnhancerProxy *self, GObject *enhancer)
 {
-  GType enhancer_types[1] = { CLAPPER_TYPE_EXTRACTABLE };
+  /* NOTE: REACTABLE must be last for "allowed" to work as expected */
+  const GType enhancer_types[] = { CLAPPER_TYPE_EXTRACTABLE, CLAPPER_TYPE_REACTABLE };
  GType *ifaces;
  GParamSpec **pspecs;
  GParamFlags enhancer_flags;
@@ -463,9 +473,12 @@ clapper_enhancer_proxy_fill_from_instance (ClapperEnhancerProxy *self, GObject *
  /* Filter to only Clapper interfaces */
  ifaces = g_type_interfaces (G_OBJECT_TYPE (enhancer), &n);
  for (i = 0; i < n; ++i) {
-    for (j = 0; j < G_N_ELEMENTS (enhancer_types); ++j) {
+    const guint n_types = G_N_ELEMENTS (enhancer_types);
+
+    for (j = 0; j < n_types; ++j) {
      if (ifaces[i] == enhancer_types[j]) {
        ifaces[write_index++] = ifaces[i];
+        self->allowed = (j < n_types - 1);
        break; // match found, do next iface
      }
    }
@@ -500,6 +513,18 @@ clapper_enhancer_proxy_get_peas_info (ClapperEnhancerProxy *self)
  return self->peas_info;
 }

+gboolean
+clapper_enhancer_proxy_has_locally_set (ClapperEnhancerProxy *self, const gchar *property_name)
+{
+  gboolean has_field;
+
+  GST_OBJECT_LOCK (self);
+  has_field = (self->local_config && gst_structure_has_field (self->local_config, property_name));
+  GST_OBJECT_UNLOCK (self);
+
+  return has_field;
+}
+
 static gboolean
 _apply_config_cb (GQuark field_id, const GValue *value, GObject *enhancer)
 {
@@ -527,6 +552,7 @@ clapper_enhancer_proxy_make_current_config (ClapperEnhancerProxy *self)

    /* Using "has_field", as set value might be %NULL */
    if ((pspec->flags & CLAPPER_ENHANCER_PARAM_LOCAL)
+        && self->local_config
        && gst_structure_has_field (self->local_config, pspec->name)) {
      if (!merged_config)
        merged_config = gst_structure_new_empty (CONFIG_STRUCTURE_NAME);
@@ -540,44 +566,13 @@ clapper_enhancer_proxy_make_current_config (ClapperEnhancerProxy *self)
      GVariant *def = g_settings_get_default_value (settings, pspec->name);

      if (!g_variant_equal (val, def)) {
-        if (!merged_config)
-          merged_config = gst_structure_new_empty (CONFIG_STRUCTURE_NAME);
+        GValue value = G_VALUE_INIT;

-        switch (pspec->value_type) {
-          case G_TYPE_BOOLEAN:
-            gst_structure_set (merged_config, pspec->name,
-                pspec->value_type, g_variant_get_boolean (val), NULL);
-            break;
-          case G_TYPE_INT:
-            gst_structure_set (merged_config, pspec->name,
-                pspec->value_type, g_variant_get_int32 (val), NULL);
-            break;
-          case G_TYPE_UINT:
-            gst_structure_set (merged_config, pspec->name,
-                pspec->value_type, g_variant_get_uint32 (val), NULL);
-            break;
-          case G_TYPE_DOUBLE:
-            gst_structure_set (merged_config, pspec->name,
-                pspec->value_type, g_variant_get_double (val), NULL);
-            break;
-          case G_TYPE_STRING:
-            gst_structure_set (merged_config, pspec->name,
-                pspec->value_type, g_variant_get_string (val, NULL), NULL);
-            break;
-          default:{
-            if (G_IS_PARAM_SPEC_ENUM (pspec)) {
-              gst_structure_set (merged_config, pspec->name,
-                  G_TYPE_INT, g_variant_get_int32 (val), NULL);
-              break;
-            } else if (G_IS_PARAM_SPEC_FLAGS (pspec)) {
-              gst_structure_set (merged_config, pspec->name,
-                  G_TYPE_UINT, g_variant_get_uint32 (val), NULL);
-              break;
-            }
-            GST_ERROR_OBJECT (self, "Unsupported enhancer \"%s\" setting type: %s",
-                pspec->name, g_type_name (pspec->value_type));
-            break;
-          }
+        if (G_LIKELY (clapper_utils_set_value_from_variant (&value, val))) {
+          if (!merged_config)
+            merged_config = gst_structure_new_empty (CONFIG_STRUCTURE_NAME);
+
+          gst_structure_take_value (merged_config, pspec->name, &value);
        }
      }

@@ -947,6 +942,20 @@ _structure_take_value_by_pspec (ClapperEnhancerProxy *self,
  return FALSE;
 }

+static void
+_trigger_reactable_configure_take (ClapperEnhancerProxy *self, GstStructure *structure)
+{
+  ClapperPlayer *player = clapper_player_get_from_ancestor (GST_OBJECT_CAST (self));
+
+  if (G_LIKELY (player != NULL)) {
+    clapper_reactables_manager_trigger_configure_take_config (
+        player->reactables_manager, self, structure);
+    gst_object_unref (player);
+  } else {
+    gst_structure_free (structure);
+  }
+}
+
 /**
 * clapper_enhancer_proxy_set_locally:
 * @proxy: a #ClapperEnhancerProxy
@@ -1017,10 +1026,10 @@ clapper_enhancer_proxy_set_locally (ClapperEnhancerProxy *self, const gchar *fir

  _update_local_config_from_structure (self, structure);

-  /* TODO: _post_local_config instead of free if managed
-   * (for when managed interfaces are implemented) */
-
-  gst_structure_free (structure);
+  if (clapper_enhancer_proxy_target_has_interface (self, CLAPPER_TYPE_REACTABLE))
+    _trigger_reactable_configure_take (self, structure);
+  else
+    gst_structure_free (structure);
 }

 /**
@@ -1084,10 +1093,62 @@ clapper_enhancer_proxy_set_locally_with_table (ClapperEnhancerProxy *self, GHash

  _update_local_config_from_structure (self, structure);

-  /* TODO: _post_local_config instead of free if managed
-   * (for when managed interfaces are implemented) */
+  if (clapper_enhancer_proxy_target_has_interface (self, CLAPPER_TYPE_REACTABLE))
+    _trigger_reactable_configure_take (self, structure);
+  else
+    gst_structure_free (structure);
+}

-  gst_structure_free (structure);
+/**
+ * clapper_enhancer_proxy_set_target_creation_allowed:
+ * @proxy: a #ClapperEnhancerProxy
+ * @allowed: whether allowed
+ *
+ * Set whether to allow instances of proxy target to be created.
+ *
+ * See [property@Clapper.EnhancerProxy:target-creation-allowed] for
+ * detailed descripton what this does.
+ *
+ * Since: 0.10
+ */
+void
+clapper_enhancer_proxy_set_target_creation_allowed (ClapperEnhancerProxy *self, gboolean allowed)
+{
+  gboolean changed;
+
+  g_return_if_fail (CLAPPER_IS_ENHANCER_PROXY (self));
+
+  GST_OBJECT_LOCK (self);
+  if ((changed = self->allowed != allowed))
+    self->allowed = allowed;
+  GST_OBJECT_UNLOCK (self);
+
+  if (changed)
+    g_object_notify_by_pspec (G_OBJECT (self), param_specs[PROP_TARGET_CREATION_ALLOWED]);
+}
+
+/**
+ * clapper_enhancer_proxy_get_target_creation_allowed:
+ * @proxy: a #ClapperEnhancerProxy
+ *
+ * Get whether it is allowed to create instances of enhancer that this proxy targets.
+ *
+ * Returns: whether target creation is allowed.
+ *
+ * Since: 0.10
+ */
+gboolean
+clapper_enhancer_proxy_get_target_creation_allowed (ClapperEnhancerProxy *self)
+{
+  gboolean allowed;
+
+  g_return_val_if_fail (CLAPPER_IS_ENHANCER_PROXY (self), FALSE);
+
+  GST_OBJECT_LOCK (self);
+  allowed = self->allowed;
+  GST_OBJECT_UNLOCK (self);
+
+  return allowed;
 }

 static void
@@ -1139,6 +1200,25 @@ clapper_enhancer_proxy_get_property (GObject *object, guint prop_id,
    case PROP_VERSION:
      g_value_set_string (value, clapper_enhancer_proxy_get_version (self));
      break;
+    case PROP_TARGET_CREATION_ALLOWED:
+      g_value_set_boolean (value, clapper_enhancer_proxy_get_target_creation_allowed (self));
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+clapper_enhancer_proxy_set_property (GObject *object, guint prop_id,
+    const GValue *value, GParamSpec *pspec)
+{
+  ClapperEnhancerProxy *self = CLAPPER_ENHANCER_PROXY_CAST (object);
+
+  switch (prop_id) {
+    case PROP_TARGET_CREATION_ALLOWED:
+      clapper_enhancer_proxy_set_target_creation_allowed (self, g_value_get_boolean (value));
+      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
@@ -1154,6 +1234,7 @@ clapper_enhancer_proxy_class_init (ClapperEnhancerProxyClass *klass)
      "Clapper Enhancer Proxy");

  gobject_class->get_property = clapper_enhancer_proxy_get_property;
+  gobject_class->set_property = clapper_enhancer_proxy_set_property;
  gobject_class->finalize = clapper_enhancer_proxy_finalize;

  /**
@@ -1211,5 +1292,29 @@ clapper_enhancer_proxy_class_init (ClapperEnhancerProxyClass *klass)
      NULL, NULL, NULL,
      G_PARAM_READABLE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);

+  /**
+   * ClapperEnhancerProxy:target-creation-allowed:
+   *
+   * Whether to allow instances of proxy target to be created.
+   *
+   * This effectively means whether the given enhancer can be used.
+   *
+   * By default all enhancers that work on-demand such as [iface@Clapper.Extractable]
+   * are allowed while enhancers implementing [iface@Clapper.Reactable] are not.
+   *
+   * Value of this property from a `GLOBAL` [class@Clapper.EnhancerProxyList] will carry
+   * over to all newly created [class@Clapper.Player] objects, while altering this on
+   * `LOCAL` proxy list will only influence given player instance that list belongs to.
+   *
+   * Changing this property will not remove already created enhancer instances, thus
+   * it is usually best practice to allow/disallow creation of given enhancer plugin
+   * right after [class@Clapper.Player] is created (before it or its queue are used).
+   *
+   * Since: 0.10
+   */
+  param_specs[PROP_TARGET_CREATION_ALLOWED] = g_param_spec_boolean ("target-creation-allowed",
+      NULL, NULL, FALSE,
+      G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
+
  g_object_class_install_properties (gobject_class, PROP_LAST, param_specs);
 }
--- a/src/lib/clapper/clapper-enhancer-proxy.h
+++ b/src/lib/clapper/clapper-enhancer-proxy.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
@@ -77,4 +76,10 @@ void clapper_enhancer_proxy_set_locally (ClapperEnhancerProxy *proxy, const gcha
 CLAPPER_API
 void clapper_enhancer_proxy_set_locally_with_table (ClapperEnhancerProxy *proxy, GHashTable *table);

+CLAPPER_API
+void clapper_enhancer_proxy_set_target_creation_allowed (ClapperEnhancerProxy *proxy, gboolean allowed);
+
+CLAPPER_API
+gboolean clapper_enhancer_proxy_get_target_creation_allowed (ClapperEnhancerProxy *proxy);
+
 G_END_DECLS
--- a/src/lib/clapper/clapper-enhancers-loader-private.h
+++ b/src/lib/clapper/clapper-enhancers-loader-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-enhancers-loader.c
+++ b/src/lib/clapper/clapper-enhancers-loader.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #include "config.h"
@@ -33,6 +32,9 @@ static HMODULE _enhancers_dll_handle = NULL;

 // Supported interfaces
 #include "clapper-extractable.h"
+#include "clapper-reactable.h"
+
+#include <clapper-functionalities-availability.h>

 #define GST_CAT_DEFAULT clapper_enhancers_loader_debug
 GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
@@ -52,6 +54,28 @@ _import_enhancers (const gchar *enhancers_path)
  g_strfreev (dir_paths);
 }

+static GObject *
+_force_create_enhancer (ClapperEnhancerProxy *proxy, GType iface_type)
+{
+  GObject *enhancer = NULL;
+  PeasPluginInfo *info = (PeasPluginInfo *) clapper_enhancer_proxy_get_peas_info (proxy);
+
+  g_mutex_lock (&load_lock);
+
+  if (!peas_plugin_info_is_loaded (info) && !peas_engine_load_plugin (_engine, info)) {
+    GST_ERROR ("Could not load enhancer: %s", peas_plugin_info_get_module_name (info));
+  } else if (!peas_engine_provides_extension (_engine, info, iface_type)) {
+    GST_LOG ("No \"%s\" enhancer in module: %s", g_type_name (iface_type),
+        peas_plugin_info_get_module_name (info));
+  } else {
+    enhancer = peas_engine_create_extension (_engine, info, iface_type, NULL);
+  }
+
+  g_mutex_unlock (&load_lock);
+
+  return enhancer;
+}
+
 /*
 * clapper_enhancers_loader_initialize:
 *
@@ -110,6 +134,36 @@ clapper_enhancers_loader_initialize (ClapperEnhancerProxyList *proxies)
    ClapperEnhancerProxy *proxy;
    gboolean filled;

+    /* FIXME: 1.0: Remove together with features code and manager.
+     * These would clash with each other, so avoid loading these
+     * as enhancers when also compiled as part of the library. */
+#if (CLAPPER_HAVE_MPRIS || CLAPPER_HAVE_DISCOVERER || CLAPPER_HAVE_SERVER)
+    guint f_index;
+    const gchar *module_name = peas_plugin_info_get_module_name (info);
+    const gchar *ported_features[] = {
+#if CLAPPER_HAVE_MPRIS
+      "clapper-mpris",
+#endif
+#if CLAPPER_HAVE_DISCOVERER
+      "clapper-discoverer",
+#endif
+#if CLAPPER_HAVE_SERVER
+      "clapper-server",
+#endif
+    };
+
+    for (f_index = 0; f_index < G_N_ELEMENTS (ported_features); ++f_index) {
+      if (strcmp (module_name, ported_features[f_index]) == 0) {
+        GST_INFO ("Skipped \"%s\" enhancer module, since its"
+          " loaded from deprecated feature object", module_name);
+        g_clear_object (&info);
+      }
+    }
+
+    if (!info) // cleared when exists as feature
+      continue;
+#endif
+
    /* Clapper supports only 1 proxy per plugin. Each plugin can
     * ship 1 class, but it can implement more than 1 interface. */
    proxy = clapper_enhancer_proxy_new_global_take ((GObject *) info);
@@ -118,12 +172,12 @@ clapper_enhancers_loader_initialize (ClapperEnhancerProxyList *proxies)
     * Otherwise make an instance and fill missing data from it (slow). */
    if (!(filled = clapper_enhancer_proxy_fill_from_cache (proxy))) {
      GObject *enhancer;
-      GType main_types[1] = { CLAPPER_TYPE_EXTRACTABLE };
+      const GType main_types[] = { CLAPPER_TYPE_EXTRACTABLE, CLAPPER_TYPE_REACTABLE };
      guint j;

      /* We cannot ask libpeas for "any" of our main interfaces, so try each one until found */
      for (j = 0; j < G_N_ELEMENTS (main_types); ++j) {
-        if ((enhancer = clapper_enhancers_loader_create_enhancer (proxy, main_types[j]))) {
+        if ((enhancer = _force_create_enhancer (proxy, main_types[j]))) {
          filled = clapper_enhancer_proxy_fill_from_instance (proxy, enhancer);
          g_object_unref (enhancer);

@@ -168,21 +222,8 @@ clapper_enhancers_loader_initialize (ClapperEnhancerProxyList *proxies)
 GObject *
 clapper_enhancers_loader_create_enhancer (ClapperEnhancerProxy *proxy, GType iface_type)
 {
-  GObject *enhancer = NULL;
-  PeasPluginInfo *info = (PeasPluginInfo *) clapper_enhancer_proxy_get_peas_info (proxy);
+  if (!clapper_enhancer_proxy_get_target_creation_allowed (proxy))
+    return NULL;

-  g_mutex_lock (&load_lock);
-
-  if (!peas_plugin_info_is_loaded (info) && !peas_engine_load_plugin (_engine, info)) {
-    GST_ERROR ("Could not load enhancer: %s", peas_plugin_info_get_module_name (info));
-  } else if (!peas_engine_provides_extension (_engine, info, iface_type)) {
-    GST_LOG ("No \"%s\" enhancer in module: %s", g_type_name (iface_type),
-        peas_plugin_info_get_module_name (info));
-  } else {
-    enhancer = peas_engine_create_extension (_engine, info, iface_type, NULL);
-  }
-
-  g_mutex_unlock (&load_lock);
-
-  return enhancer;
+  return _force_create_enhancer (proxy, iface_type);
 }
--- a/src/lib/clapper/clapper-enums-private.h
+++ b/src/lib/clapper/clapper-enums-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-enums.h
+++ b/src/lib/clapper/clapper-enums.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
@@ -151,4 +150,23 @@ typedef enum
  CLAPPER_ENHANCER_PARAM_DIRPATH = 1 << 20,
 } ClapperEnhancerParamFlags;

+/**
+ * ClapperReactableItemUpdatedFlags:
+ * @CLAPPER_REACTABLE_ITEM_UPDATED_TITLE: Media item title was updated.
+ * @CLAPPER_REACTABLE_ITEM_UPDATED_DURATION: Media item duration was updated.
+ * @CLAPPER_REACTABLE_ITEM_UPDATED_TIMELINE: Media item timeline was updated.
+ * @CLAPPER_REACTABLE_ITEM_UPDATED_TAGS: Media item tags were updated.
+ *
+ * Flags informing which properties were updated within [class@Clapper.MediaItem].
+ *
+ * Since: 0.10
+ */
+typedef enum
+{
+  CLAPPER_REACTABLE_ITEM_UPDATED_TITLE = 1 << 0,
+  CLAPPER_REACTABLE_ITEM_UPDATED_DURATION = 1 << 1,
+  CLAPPER_REACTABLE_ITEM_UPDATED_TIMELINE = 1 << 2,
+  CLAPPER_REACTABLE_ITEM_UPDATED_TAGS = 1 << 3,
+} ClapperReactableItemUpdatedFlags;
+
 G_END_DECLS
--- a/src/lib/clapper/clapper-extractable-private.h
+++ b/src/lib/clapper/clapper-extractable-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-extractable.c
+++ b/src/lib/clapper/clapper-extractable.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 /**
--- a/src/lib/clapper/clapper-extractable.h
+++ b/src/lib/clapper/clapper-extractable.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-feature-private.h
+++ b/src/lib/clapper/clapper-feature-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-feature.c
+++ b/src/lib/clapper/clapper-feature.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 /**
@@ -30,6 +29,8 @@
 * virtual functions logic, while for controlling playback implementation
 * may call [method@Gst.Object.get_parent] to acquire a weak reference on
 * a parent [class@Clapper.Player] object feature was added to.
+ *
+ * Deprecated: 0.10: Use [iface@Clapper.Reactable] instead.
 */

 #include "clapper-feature.h"
--- a/src/lib/clapper/clapper-feature.h
+++ b/src/lib/clapper/clapper-feature.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
@@ -37,7 +36,7 @@ G_BEGIN_DECLS
 #define CLAPPER_TYPE_FEATURE (clapper_feature_get_type())
 #define CLAPPER_FEATURE_CAST(obj) ((ClapperFeature *)(obj))

-CLAPPER_API
+CLAPPER_DEPRECATED_FOR(ClapperReactable)
 G_DECLARE_DERIVABLE_TYPE (ClapperFeature, clapper_feature, CLAPPER, FEATURE, GstObject)

 /**
--- a/src/lib/clapper/clapper-features-bus-private.h
+++ b/src/lib/clapper/clapper-features-bus-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-features-bus.c
+++ b/src/lib/clapper/clapper-features-bus.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #include "clapper-bus-private.h"
--- a/src/lib/clapper/clapper-features-manager-private.h
+++ b/src/lib/clapper/clapper-features-manager-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-features-manager.c
+++ b/src/lib/clapper/clapper-features-manager.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #include "clapper-features-manager-private.h"
--- a/src/lib/clapper/clapper-functionalities-availability.h.in
+++ b/src/lib/clapper/clapper-functionalities-availability.h.in
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-harvest-private.h
+++ b/src/lib/clapper/clapper-harvest-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-harvest.c
+++ b/src/lib/clapper/clapper-harvest.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 /**
--- a/src/lib/clapper/clapper-harvest.h
+++ b/src/lib/clapper/clapper-harvest.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-marker-private.h
+++ b/src/lib/clapper/clapper-marker-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-marker.c
+++ b/src/lib/clapper/clapper-marker.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 /**
--- a/src/lib/clapper/clapper-marker.h
+++ b/src/lib/clapper/clapper-marker.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-media-item-private.h
+++ b/src/lib/clapper/clapper-media-item-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
@@ -23,7 +22,7 @@
 #include <gst/pbutils/pbutils.h>

 #include "clapper-media-item.h"
-#include "clapper-player-private.h"
+#include "clapper-player.h"
 #include "clapper-app-bus-private.h"

 G_BEGIN_DECLS
--- a/src/lib/clapper/clapper-media-item.c
+++ b/src/lib/clapper/clapper-media-item.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 /**
@@ -30,6 +29,7 @@
 #include "clapper-timeline-private.h"
 #include "clapper-player-private.h"
 #include "clapper-playbin-bus-private.h"
+#include "clapper-reactables-manager-private.h"
 #include "clapper-features-manager-private.h"
 #include "clapper-utils-private.h"

@@ -470,7 +470,7 @@ _tags_replace_func (const GstTagList *tags, const gchar *tag, ClapperMediaItemTa

 static gboolean
 clapper_media_item_insert_tags_internal (ClapperMediaItem *self, const GstTagList *tags,
-    ClapperAppBus *app_bus, gboolean from_user)
+    ClapperAppBus *app_bus, gboolean from_user, ClapperReactableItemUpdatedFlags *flags)
 {
  ClapperMediaItemTagIterData data;
  gboolean title_changed = FALSE, cont_changed = FALSE;
@@ -485,8 +485,12 @@ clapper_media_item_insert_tags_internal (ClapperMediaItem *self, const GstTagLis
    gst_tag_list_foreach (tags, (GstTagForeachFunc) _tags_replace_func, &data);

  if (data.changed) {
-    title_changed = _refresh_tag_prop_unlocked (self, GST_TAG_TITLE,
-        from_user, &self->title);
+    *flags |= CLAPPER_REACTABLE_ITEM_UPDATED_TAGS;
+
+    if ((title_changed = _refresh_tag_prop_unlocked (self, GST_TAG_TITLE,
+        from_user, &self->title))) {
+      *flags |= CLAPPER_REACTABLE_ITEM_UPDATED_TITLE;
+    }
    cont_changed = _refresh_tag_prop_unlocked (self, GST_TAG_CONTAINER_FORMAT,
        from_user, &self->container_format);
  }
@@ -547,6 +551,7 @@ clapper_media_item_populate_tags (ClapperMediaItem *self, const GstTagList *tags
 {
  ClapperPlayer *player;
  ClapperAppBus *app_bus = NULL;
+  ClapperReactableItemUpdatedFlags flags = 0;
  gboolean changed;

  g_return_val_if_fail (CLAPPER_IS_MEDIA_ITEM (self), FALSE);
@@ -560,11 +565,13 @@ clapper_media_item_populate_tags (ClapperMediaItem *self, const GstTagList *tags
  if ((player = clapper_player_get_from_ancestor (GST_OBJECT_CAST (self))))
    app_bus = player->app_bus;

-  changed = clapper_media_item_insert_tags_internal (self, tags, app_bus, TRUE);
+  changed = clapper_media_item_insert_tags_internal (self, tags, app_bus, TRUE, &flags);

  if (changed && player) {
    ClapperFeaturesManager *features_manager;

+    if (player->reactables_manager)
+      clapper_reactables_manager_trigger_item_updated (player->reactables_manager, self, flags);
    if ((features_manager = clapper_player_get_features_manager (player)))
      clapper_features_manager_trigger_item_updated (features_manager, self);
  }
@@ -597,11 +604,14 @@ clapper_media_item_update_from_tag_list (ClapperMediaItem *self, const GstTagLis
  GstTagScope scope = gst_tag_list_get_scope (tags);

  if (scope == GST_TAG_SCOPE_GLOBAL) {
-    gboolean changed = clapper_media_item_insert_tags_internal (self, tags, player->app_bus, FALSE);
+    ClapperReactableItemUpdatedFlags flags = 0;
+    gboolean changed = clapper_media_item_insert_tags_internal (self, tags, player->app_bus, FALSE, &flags);

    if (changed) {
      ClapperFeaturesManager *features_manager;

+      if (player->reactables_manager)
+        clapper_reactables_manager_trigger_item_updated (player->reactables_manager, self, flags);
      if ((features_manager = clapper_player_get_features_manager (player)))
        clapper_features_manager_trigger_item_updated (features_manager, self);
    }
@@ -614,6 +624,7 @@ clapper_media_item_update_from_discoverer_info (ClapperMediaItem *self, GstDisco
  ClapperPlayer *player;
  GstDiscovererStreamInfo *sinfo;
  GstClockTime duration;
+  ClapperReactableItemUpdatedFlags flags = 0;
  gdouble val_dbl;
  gboolean changed = FALSE;

@@ -629,7 +640,7 @@ clapper_media_item_update_from_discoverer_info (ClapperMediaItem *self, GstDisco
      GstDiscovererContainerInfo *cinfo = (GstDiscovererContainerInfo *) sinfo;

      if ((tags = gst_discoverer_container_info_get_tags (cinfo)))
-        changed |= clapper_media_item_insert_tags_internal (self, tags, player->app_bus, FALSE);
+        changed |= clapper_media_item_insert_tags_internal (self, tags, player->app_bus, FALSE, &flags);
    }
    gst_discoverer_stream_info_unref (sinfo);
  }
@@ -640,11 +651,16 @@ clapper_media_item_update_from_discoverer_info (ClapperMediaItem *self, GstDisco
    duration = 0;

  val_dbl = (gdouble) duration / GST_SECOND;
-  changed |= clapper_media_item_set_duration (self, val_dbl, player->app_bus);
+  if (clapper_media_item_set_duration (self, val_dbl, player->app_bus)) {
+    changed = TRUE;
+    flags |= CLAPPER_REACTABLE_ITEM_UPDATED_DURATION;
+  }

  if (changed) {
    ClapperFeaturesManager *features_manager;

+    if (player->reactables_manager)
+      clapper_reactables_manager_trigger_item_updated (player->reactables_manager, self, flags);
    if ((features_manager = clapper_player_get_features_manager (player)))
      clapper_features_manager_trigger_item_updated (features_manager, self);
  }
--- a/src/lib/clapper/clapper-media-item.h
+++ b/src/lib/clapper/clapper-media-item.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-playbin-bus-private.h
+++ b/src/lib/clapper/clapper-playbin-bus-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-playbin-bus.c
+++ b/src/lib/clapper/clapper-playbin-bus.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #include <gst/pbutils/pbutils.h>
@@ -173,6 +172,10 @@ _update_current_duration (ClapperPlayer *player)
    if (clapper_media_item_set_duration (player->played_item, duration_dbl, player->app_bus)) {
      ClapperFeaturesManager *features_manager;

+      if (player->reactables_manager) {
+        clapper_reactables_manager_trigger_item_updated (player->reactables_manager, player->played_item,
+            CLAPPER_REACTABLE_ITEM_UPDATED_DURATION);
+      }
      if ((features_manager = clapper_player_get_features_manager (player)))
        clapper_features_manager_trigger_item_updated (features_manager, player->played_item);
    }
@@ -1046,6 +1049,8 @@ _handle_stream_start_msg (GstMessage *msg, ClapperPlayer *player)
  if (G_LIKELY (changed)) {
    clapper_queue_handle_played_item_changed (player->queue, player->played_item, player->app_bus);

+    if (player->reactables_manager)
+      clapper_reactables_manager_trigger_played_item_changed (player->reactables_manager, player->played_item);
    if (clapper_player_get_have_features (player))
      clapper_features_manager_trigger_played_item_changed (player->features_manager, player->played_item);
  }
--- a/src/lib/clapper/clapper-player-private.h
+++ b/src/lib/clapper/clapper-player-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
@@ -27,6 +26,7 @@

 #include "clapper-app-bus-private.h"
 #include "clapper-features-manager-private.h"
+#include "clapper-reactables-manager-private.h"

 G_BEGIN_DECLS

@@ -47,6 +47,8 @@ struct _ClapperPlayer
  ClapperFeaturesManager *features_manager;
  gint have_features; // atomic integer

+  ClapperReactablesManager *reactables_manager;
+
  ClapperEnhancerProxyList *enhancer_proxies;

  /* This is different from queue current item as it is used/changed only
--- a/src/lib/clapper/clapper-player.c
+++ b/src/lib/clapper/clapper-player.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 /**
@@ -50,6 +49,7 @@
 #include "clapper-audio-stream-private.h"
 #include "clapper-subtitle-stream-private.h"
 #include "clapper-enhancer-proxy-list-private.h"
+#include "clapper-reactable.h"
 #include "clapper-enums-private.h"
 #include "clapper-utils-private.h"
 #include "../shared/clapper-shared-utils-private.h"
@@ -159,6 +159,8 @@ clapper_player_refresh_position (ClapperPlayer *self)

    clapper_app_bus_post_prop_notify (self->app_bus,
        GST_OBJECT_CAST (self), param_specs[PROP_POSITION]);
+    if (self->reactables_manager)
+      clapper_reactables_manager_trigger_position_changed (self->reactables_manager, position_dbl);
    if (clapper_player_get_have_features (self))
      clapper_features_manager_trigger_position_changed (self->features_manager, position_dbl);
  }
@@ -225,6 +227,8 @@ clapper_player_handle_playbin_state_changed (ClapperPlayer *self)

    clapper_app_bus_post_prop_notify (self->app_bus,
        GST_OBJECT_CAST (self), param_specs[PROP_STATE]);
+    if (self->reactables_manager)
+      clapper_reactables_manager_trigger_state_changed (self->reactables_manager, state);
    if (clapper_player_get_have_features (self))
      clapper_features_manager_trigger_state_changed (self->features_manager, state);
  }
@@ -256,6 +260,8 @@ clapper_player_handle_playbin_volume_changed (ClapperPlayer *self, const GValue

    clapper_app_bus_post_prop_notify (self->app_bus,
        GST_OBJECT_CAST (self), param_specs[PROP_VOLUME]);
+    if (self->reactables_manager)
+      clapper_reactables_manager_trigger_volume_changed (self->reactables_manager, volume);
    if (clapper_player_get_have_features (self))
      clapper_features_manager_trigger_volume_changed (self->features_manager, volume);
  }
@@ -280,6 +286,8 @@ clapper_player_handle_playbin_mute_changed (ClapperPlayer *self, const GValue *v

    clapper_app_bus_post_prop_notify (self->app_bus,
        GST_OBJECT_CAST (self), param_specs[PROP_MUTE]);
+    if (self->reactables_manager)
+      clapper_reactables_manager_trigger_mute_changed (self->reactables_manager, mute);
    if (clapper_player_get_have_features (self))
      clapper_features_manager_trigger_mute_changed (self->features_manager, mute);
  }
@@ -400,6 +408,8 @@ clapper_player_handle_playbin_rate_changed (ClapperPlayer *self, gdouble speed)

    clapper_app_bus_post_prop_notify (self->app_bus,
        GST_OBJECT_CAST (self), param_specs[PROP_SPEED]);
+    if (self->reactables_manager)
+      clapper_reactables_manager_trigger_speed_changed (self->reactables_manager, speed);
    if (clapper_player_get_have_features (self))
      clapper_features_manager_trigger_speed_changed (self->features_manager, speed);
  }
@@ -2326,6 +2336,11 @@ clapper_player_init (ClapperPlayer *self)

  clapper_enhancer_proxy_list_fill_from_global_proxies (self->enhancer_proxies);

+  if (clapper_enhancer_proxy_list_has_proxy_with_interface (self->enhancer_proxies, CLAPPER_TYPE_REACTABLE)) {
+    self->reactables_manager = clapper_reactables_manager_new ();
+    gst_object_set_parent (GST_OBJECT_CAST (self->reactables_manager), GST_OBJECT_CAST (self));
+  }
+
  self->position_query = gst_query_new_position (GST_FORMAT_TIME);

  self->current_state = GST_STATE_NULL;
@@ -2392,6 +2407,11 @@ clapper_player_finalize (GObject *object)
  gst_object_unparent (GST_OBJECT_CAST (self->subtitle_streams));
  gst_object_unref (self->subtitle_streams);

+  if (self->reactables_manager) {
+    gst_object_unparent (GST_OBJECT_CAST (self->reactables_manager));
+    gst_object_unref (self->reactables_manager);
+  }
+
  gst_object_unparent (GST_OBJECT_CAST (self->enhancer_proxies));
  gst_object_unref (self->enhancer_proxies);

--- a/src/lib/clapper/clapper-player.h
+++ b/src/lib/clapper/clapper-player.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-queue-private.h
+++ b/src/lib/clapper/clapper-queue-private.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-queue.c
+++ b/src/lib/clapper/clapper-queue.c
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 /**
@@ -29,6 +28,8 @@
 #include "clapper-media-item-private.h"
 #include "clapper-player-private.h"
 #include "clapper-playbin-bus-private.h"
+#include "clapper-reactables-manager-private.h"
+#include "clapper-features-manager-private.h"

 #define CLAPPER_QUEUE_GET_REC_LOCK(obj) (&CLAPPER_QUEUE_CAST(obj)->rec_lock)
 #define CLAPPER_QUEUE_REC_LOCK(obj) g_rec_mutex_lock (CLAPPER_QUEUE_GET_REC_LOCK(obj))
@@ -132,15 +133,27 @@ _announce_model_update (ClapperQueue *self, guint index, guint removed, guint ad
  if (removed != added) {
    ClapperPlayer *player = clapper_player_get_from_ancestor (GST_OBJECT_CAST (self));

-    if (player && clapper_player_get_have_features (player)) {
-      if (added == 1) // addition
-        clapper_features_manager_trigger_queue_item_added (player->features_manager, changed_item, index);
-      else if (removed == 1) // removal
-        clapper_features_manager_trigger_queue_item_removed (player->features_manager, changed_item, index);
-      else if (removed > 1 && added == 0) // queue cleared
-        clapper_features_manager_trigger_queue_cleared (player->features_manager);
-      else
+    if (player) {
+      gboolean have_features = clapper_player_get_have_features (player);
+
+      if (added == 1) { // addition
+        if (player->reactables_manager)
+          clapper_reactables_manager_trigger_queue_item_added (player->reactables_manager, changed_item, index);
+        if (have_features)
+          clapper_features_manager_trigger_queue_item_added (player->features_manager, changed_item, index);
+      } else if (removed == 1) { // removal
+        if (player->reactables_manager)
+          clapper_reactables_manager_trigger_queue_item_removed (player->reactables_manager, changed_item, index);
+        if (have_features)
+          clapper_features_manager_trigger_queue_item_removed (player->features_manager, changed_item, index);
+      } else if (removed > 1 && added == 0) { // queue cleared
+        if (player->reactables_manager)
+          clapper_reactables_manager_trigger_queue_cleared (player->reactables_manager);
+        if (have_features)
+          clapper_features_manager_trigger_queue_cleared (player->features_manager);
+      } else {
        g_assert_not_reached ();
+      }
    }

    gst_clear_object (&player);
@@ -160,6 +173,8 @@ _announce_reposition (ClapperQueue *self, guint before, guint after)
  GST_DEBUG_OBJECT (self, "Announcing item reposition: %u -> %u", before, after);

  if ((player = clapper_player_get_from_ancestor (GST_OBJECT_CAST (self)))) {
+    if (player->reactables_manager)
+      clapper_reactables_manager_trigger_queue_item_repositioned (player->reactables_manager, before, after);
    if (clapper_player_get_have_features (player))
      clapper_features_manager_trigger_queue_item_repositioned (player->features_manager, before, after);

@@ -989,6 +1004,8 @@ clapper_queue_set_progression_mode (ClapperQueue *self, ClapperQueueProgressionM

    clapper_app_bus_post_prop_notify (player->app_bus,
        GST_OBJECT_CAST (self), param_specs[PROP_PROGRESSION_MODE]);
+    if (player->reactables_manager)
+      clapper_reactables_manager_trigger_queue_progression_changed (player->reactables_manager, mode);
    if (clapper_player_get_have_features (player))
      clapper_features_manager_trigger_queue_progression_changed (player->features_manager, mode);

--- a/src/lib/clapper/clapper-queue.h
+++ b/src/lib/clapper/clapper-queue.h
@@ -12,9 +12,8 @@
 * 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, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
 */

 #pragma once
--- a/src/lib/clapper/clapper-reactable.c
+++ b/src/lib/clapper/clapper-reactable.c
@@ -0,0 +1,208 @@
+/* Clapper Playback Library
+ * Copyright (C) 2025 Rafał Dzięgiel <rafostar.github@gmail.com>
+ *
+ * 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
+ * <https://www.gnu.org/licenses/>.
+ */
+
+/**
+ * ClapperReactable:
+ *
+ * An interface for creating enhancers that react to the
+ * playback and/or events that should influence it.
+ *
+ * Since: 0.10
+ */
+
+#include "clapper-reactable.h"
+#include "clapper-utils-private.h"
+
+#define CLAPPER_REACTABLE_DO_WITH_QUEUE(reactable, _queue_dst, ...) {  \
+    ClapperPlayer *_player = clapper_reactable_get_player (reactable); \
+    if (G_LIKELY (_player != NULL)) {                                  \
+      *_queue_dst = clapper_player_get_queue (_player);                \
+      __VA_ARGS__                                                      \
+      gst_object_unref (_player); }}
+
+G_DEFINE_INTERFACE (ClapperReactable, clapper_reactable, GST_TYPE_OBJECT);
+
+static void
+clapper_reactable_default_init (ClapperReactableInterface *iface)
+{
+}
+
+/**
+ * clapper_reactable_get_player:
+ * @reactable: a #ClapperReactable
+ *
+ * Get the [class@Clapper.Player] that this reactable is reacting to.
+ *
+ * This is meant to be used in implementations where reaction goes the
+ * other way around (from enhancer plugin to the player). For example
+ * some external event needs to influence parent player object like
+ * changing its state, seeking, etc.
+ *
+ * Note that enhancers are working in a non-main application thread, thus
+ * if you need to do operations on a [class@Clapper.Queue] such as adding/removing
+ * items, you need to switch thread first. Otherwise this will not be thread safe
+ * for applications that use single threaded toolkits such as #GTK. You can do this
+ * manually or use provided reactable convenience functions.
+ *
+ * Due to the threaded nature, you should also avoid comparisons to the current
+ * properties values in the player or its queue. While these are thread safe, there
+ * is no guarantee that values/objects between threads are still the same in both
+ * (or still exist). For example, instead of using [property@Clapper.Queue:current_item],
+ * monitor it with implemented [vfunc@Clapper.Reactable.played_item_changed] instead,
+ * as these functions are all serialized into your implementation thread.
+ *
+ * Returns: (transfer full) (nullable): A reference to the parent #ClapperPlayer.
+ *
+ * Since: 0.10
+ */
+ClapperPlayer *
+clapper_reactable_get_player (ClapperReactable *self)
+{
+  g_return_val_if_fail (CLAPPER_IS_REACTABLE (self), NULL);
+
+  return CLAPPER_PLAYER_CAST (gst_object_get_parent (GST_OBJECT_CAST (self)));
+}
+
+/**
+ * clapper_reactable_queue_append_sync:
+ * @reactable: a #ClapperReactable
+ * @item: a #ClapperMediaItem
+ *
+ * A convenience function that within application main thread synchronously appends
+ * an @item to the playback queue of the player that @reactable belongs to.
+ *
+ * Reactable enhancers should only modify the queue from the application
+ * main thread, switching thread either themselves or using this convenience
+ * function that does so.
+ *
+ * Note that this function will do no operation if called when there is no player
+ * set yet (e.g. inside enhancer construction) or if enhancer outlived the parent
+ * instance somehow. Both cases are considered to be implementation bug.
+ *
+ * Since: 0.10
+ */
+void
+clapper_reactable_queue_append_sync (ClapperReactable *self, ClapperMediaItem *item)
+{
+  ClapperQueue *queue;
+
+  g_return_if_fail (CLAPPER_IS_REACTABLE (self));
+  g_return_if_fail (CLAPPER_IS_MEDIA_ITEM (item));
+
+  CLAPPER_REACTABLE_DO_WITH_QUEUE (self, &queue, {
+    clapper_utils_queue_append_on_main_sync (queue, item);
+  });
+}
+
+/**
+ * clapper_reactable_queue_insert_sync:
+ * @reactable: a #ClapperReactable
+ * @item: a #ClapperMediaItem
+ * @after_item: a #ClapperMediaItem after which to insert or %NULL to prepend
+ *
+ * A convenience function that within application main thread synchronously inserts
+ * an @item to the playback queue position after @after_item of the player that
+ * @reactable belongs to.
+ *
+ * This function uses @after_item instead of position index in order to ensure
+ * desired position does not change during thread switching.
+ *
+ * Reactable enhancers should only modify the queue from the application
+ * main thread, switching thread either themselves or using this convenience
+ * function that does so.
+ *
+ * Note that this function will do no operation if called when there is no player
+ * set yet (e.g. inside enhancer construction) or if enhancer outlived the parent
+ * instance somehow. Both cases are considered to be implementation bug.
+ *
+ * Since: 0.10
+ */
+void
+clapper_reactable_queue_insert_sync (ClapperReactable *self,
+    ClapperMediaItem *item, ClapperMediaItem *after_item)
+{
+  ClapperQueue *queue;
+
+  g_return_if_fail (CLAPPER_IS_REACTABLE (self));
+  g_return_if_fail (CLAPPER_IS_MEDIA_ITEM (item));
+  g_return_if_fail (after_item == NULL || CLAPPER_IS_MEDIA_ITEM (after_item));
+
+  CLAPPER_REACTABLE_DO_WITH_QUEUE (self, &queue, {
+    clapper_utils_queue_insert_on_main_sync (queue, item, after_item);
+  });
+}
+
+/**
+ * clapper_reactable_queue_remove_sync:
+ * @reactable: a #ClapperReactable
+ * @item: a #ClapperMediaItem
+ *
+ * A convenience function that within application main thread synchronously removes
+ * an @item from the playback queue of the player that @reactable belongs to.
+ *
+ * Reactable enhancers should only modify the queue from the application
+ * main thread, switching thread either themselves or using this convenience
+ * function that does so.
+ *
+ * Note that this function will do no operation if called when there is no player
+ * set yet (e.g. inside enhancer construction) or if enhancer outlived the parent
+ * instance somehow. Both cases are considered to be implementation bug.
+ *
+ * Since: 0.10
+ */
+void
+clapper_reactable_queue_remove_sync (ClapperReactable *self, ClapperMediaItem *item)
+{
+  ClapperQueue *queue;
+
+  g_return_if_fail (CLAPPER_IS_REACTABLE (self));
+  g_return_if_fail (CLAPPER_IS_MEDIA_ITEM (item));
+
+  CLAPPER_REACTABLE_DO_WITH_QUEUE (self, &queue, {
+    clapper_utils_queue_remove_on_main_sync (queue, item);
+  });
+}
+
+/**
+ * clapper_reactable_queue_clear_sync:
+ * @reactable: a #ClapperReactable
+ *
+ * A convenience function that within application main thread synchronously clears
+ * the playback queue of the player that @reactable belongs to.
+ *
+ * Reactable enhancers should only modify the queue from the application
+ * main thread, switching thread either themselves or using this convenience
+ * function that does so.
+ *
+ * Note that this function will do no operation if called when there is no player
+ * set yet (e.g. inside enhancer construction) or if enhancer outlived the parent
+ * instance somehow. Both cases are considered to be implementation bug.
+ *
+ * Since: 0.10
+ */
+void
+clapper_reactable_queue_clear_sync (ClapperReactable *self)
+{
+  ClapperQueue *queue;
+
+  g_return_if_fail (CLAPPER_IS_REACTABLE (self));
+
+  CLAPPER_REACTABLE_DO_WITH_QUEUE (self, &queue, {
+    clapper_utils_queue_clear_on_main_sync (queue);
+  });
+}
--- a/src/lib/clapper/clapper-reactable.h
+++ b/src/lib/clapper/clapper-reactable.h
@@ -0,0 +1,228 @@
+/* Clapper Playback Library
+ * Copyright (C) 2025 Rafał Dzięgiel <rafostar.github@gmail.com>
+ *
+ * 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
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#if !defined(__CLAPPER_INSIDE__) && !defined(CLAPPER_COMPILATION)
+#error "Only <clapper/clapper.h> can be included directly."
+#endif
+
+#include <glib.h>
+#include <glib-object.h>
+#include <gst/gst.h>
+
+#include <clapper/clapper-visibility.h>
+#include <clapper/clapper-player.h>
+#include <clapper/clapper-enums.h>
+
+G_BEGIN_DECLS
+
+#define CLAPPER_TYPE_REACTABLE (clapper_reactable_get_type())
+#define CLAPPER_REACTABLE_CAST(obj) ((ClapperReactable *)(obj))
+
+CLAPPER_API
+G_DECLARE_INTERFACE (ClapperReactable, clapper_reactable, CLAPPER, REACTABLE, GstObject)
+
+/**
+ * ClapperReactableInterface:
+ * @parent_iface: The parent interface structure.
+ * @state_changed: Player state changed.
+ * @position_changed: Player position changed.
+ * @speed_changed: Player speed changed.
+ * @volume_changed: Player volume changed.
+ * @mute_changed: Player mute state changed.
+ * @played_item_changed: New media item started playing.
+ * @item_updated: An item in queue got updated.
+ * @queue_item_added: An item was added to the queue.
+ * @queue_item_removed: An item was removed from queue.
+ * @queue_item_repositioned: An item changed position within queue.
+ * @queue_cleared: All items were removed from queue.
+ * @queue_progression_changed: Progression mode of the queue was changed.
+ */
+struct _ClapperReactableInterface
+{
+  GTypeInterface parent_iface;
+
+  /**
+   * ClapperReactableInterface::state_changed:
+   * @reactable: a #ClapperReactable
+   * @state: a #ClapperPlayerState
+   *
+   * Player state changed.
+   *
+   * Since: 0.10
+   */
+  void (* state_changed) (ClapperReactable *reactable, ClapperPlayerState state);
+
+  /**
+   * ClapperReactableInterface::position_changed:
+   * @reactable: a #ClapperReactable
+   * @position: a decimal number with current position in seconds
+   *
+   * Player position changed.
+   *
+   * Since: 0.10
+   */
+  void (* position_changed) (ClapperReactable *reactable, gdouble position);
+
+  /**
+   * ClapperReactableInterface::speed_changed:
+   * @reactable: a #ClapperReactable
+   * @speed: the playback speed multiplier
+   *
+   * Player speed changed.
+   *
+   * Since: 0.10
+   */
+  void (* speed_changed) (ClapperReactable *reactable, gdouble speed);
+
+  /**
+   * ClapperReactableInterface::volume_changed:
+   * @reactable: a #ClapperReactable
+   * @volume: the volume level
+   *
+   * Player volume changed.
+   *
+   * Since: 0.10
+   */
+  void (* volume_changed) (ClapperReactable *reactable, gdouble volume);
+
+  /**
+   * ClapperReactableInterface::mute_changed:
+   * @reactable: a #ClapperReactable
+   * @mute: %TRUE if player is muted, %FALSE otherwise
+   *
+   * Player mute state changed.
+   *
+   * Since: 0.10
+   */
+  void (* mute_changed) (ClapperReactable *reactable, gboolean mute);
+
+  /**
+   * ClapperReactableInterface::played_item_changed:
+   * @reactable: a #ClapperReactable
+   * @item: a #ClapperMediaItem that is now playing
+   *
+   * New media item started playing. All following events (such as position changes)
+   * will be related to this @item from now on.
+   *
+   * Since: 0.10
+   */
+  void (* played_item_changed) (ClapperReactable *reactable, ClapperMediaItem *item);
+
+  /**
+   * ClapperReactableInterface::item_updated:
+   * @reactable: a #ClapperReactable
+   * @item: a #ClapperMediaItem that was updated
+   * @flags: flags informing which properties were updated
+   *
+   * An item in queue got updated.
+   *
+   * This might be (or not) currently played item.
+   * Implementations can compare it against the last item from
+   * [vfunc@Clapper.Reactable.played_item_changed] if they
+   * need to know that.
+   *
+   * Since: 0.10
+   */
+  void (* item_updated) (ClapperReactable *reactable, ClapperMediaItem *item, ClapperReactableItemUpdatedFlags flags);
+
+  /**
+   * ClapperReactableInterface::queue_item_added:
+   * @reactable: a #ClapperReactable
+   * @item: a #ClapperMediaItem that was added
+   * @index: position at which @item was placed in queue
+   *
+   * An item was added to the queue.
+   *
+   * Since: 0.10
+   */
+  void (* queue_item_added) (ClapperReactable *reactable, ClapperMediaItem *item, guint index);
+
+  /**
+   * ClapperReactableInterface::queue_item_removed:
+   * @reactable: a #ClapperReactable
+   * @item: a #ClapperMediaItem that was removed
+   * @index: position from which @item was removed in queue
+   *
+   * An item was removed from queue.
+   *
+   * Implementations that are interested in queue items removal
+   * should also implement [vfunc@Clapper.Reactable.queue_cleared].
+   *
+   * Since: 0.10
+   */
+  void (* queue_item_removed) (ClapperReactable *reactable, ClapperMediaItem *item, guint index);
+
+  /**
+   * ClapperReactableInterface::queue_item_repositioned:
+   * @reactable: a #ClapperReactable
+   * @before: position from which #ClapperMediaItem was removed
+   * @after: position at which #ClapperMediaItem was inserted after removal
+   *
+   * An item changed position within queue.
+   *
+   * Since: 0.10
+   */
+  void (* queue_item_repositioned) (ClapperReactable *reactable, guint before, guint after);
+
+  /**
+   * ClapperReactableInterface::queue_cleared:
+   * @reactable: a #ClapperReactable
+   *
+   * All items were removed from queue.
+   *
+   * Note that in such event [vfunc@Clapper.Reactable.queue_item_removed]
+   * will NOT be called for each item for performance reasons. You probably
+   * want to implement this function if you also implemented item removal.
+   *
+   * Since: 0.10
+   */
+  void (* queue_cleared) (ClapperReactable *reactable);
+
+  /**
+   * ClapperReactableInterface::queue_progression_changed:
+   * @reactable: a #ClapperReactable
+   * @mode: a #ClapperQueueProgressionMode
+   *
+   * Progression mode of the queue was changed.
+   *
+   * Since: 0.10
+   */
+  void (* queue_progression_changed) (ClapperReactable *reactable, ClapperQueueProgressionMode mode);
+
+  /*< private >*/
+  gpointer padding[8];
+};
+
+CLAPPER_API
+ClapperPlayer * clapper_reactable_get_player (ClapperReactable *reactable);
+
+CLAPPER_API
+void clapper_reactable_queue_append_sync (ClapperReactable *reactable, ClapperMediaItem *item);
+
+CLAPPER_API
+void clapper_reactable_queue_insert_sync (ClapperReactable *reactable, ClapperMediaItem *item, ClapperMediaItem *after_item);
+
+CLAPPER_API
+void clapper_reactable_queue_remove_sync (ClapperReactable *reactable, ClapperMediaItem *item);
+
+CLAPPER_API
+void clapper_reactable_queue_clear_sync (ClapperReactable *reactable);
+
+G_END_DECLS
--- a/src/lib/clapper/clapper-reactables-manager-private.h
+++ b/src/lib/clapper/clapper-reactables-manager-private.h
@@ -0,0 +1,78 @@
+/* Clapper Playback Library
+ * Copyright (C) 2025 Rafał Dzięgiel <rafostar.github@gmail.com>
+ *
+ * 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
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "clapper-enums.h"
+#include "clapper-threaded-object.h"
+#include "clapper-enhancer-proxy.h"
+#include "clapper-media-item.h"
+
+G_BEGIN_DECLS
+
+#define CLAPPER_TYPE_REACTABLES_MANAGER (clapper_reactables_manager_get_type())
+#define CLAPPER_REACTABLES_MANAGER_CAST(obj) ((ClapperReactablesManager *)(obj))
+
+G_DECLARE_FINAL_TYPE (ClapperReactablesManager, clapper_reactables_manager, CLAPPER, REACTABLES_MANAGER, ClapperThreadedObject)
+
+G_GNUC_INTERNAL
+void clapper_reactables_manager_initialize (void);
+
+G_GNUC_INTERNAL
+ClapperReactablesManager * clapper_reactables_manager_new (void);
+
+G_GNUC_INTERNAL
+void clapper_reactables_manager_trigger_configure_take_config (ClapperReactablesManager *manager, ClapperEnhancerProxy *proxy, GstStructure *config);
+
+G_GNUC_INTERNAL
+void clapper_reactables_manager_trigger_state_changed (ClapperReactablesManager *manager, ClapperPlayerState state);
+
+G_GNUC_INTERNAL
+void clapper_reactables_manager_trigger_position_changed (ClapperReactablesManager *manager, gdouble position);
+
+G_GNUC_INTERNAL
+void clapper_reactables_manager_trigger_speed_changed (ClapperReactablesManager *manager, gdouble speed);
+
+G_GNUC_INTERNAL
+void clapper_reactables_manager_trigger_volume_changed (ClapperReactablesManager *manager, gdouble volume);
+
+G_GNUC_INTERNAL
+void clapper_reactables_manager_trigger_mute_changed (ClapperReactablesManager *manager, gboolean mute);
+
+G_GNUC_INTERNAL
+void clapper_reactables_manager_trigger_played_item_changed (ClapperReactablesManager *manager, ClapperMediaItem *item);
+
+G_GNUC_INTERNAL
+void clapper_reactables_manager_trigger_item_updated (ClapperReactablesManager *manager, ClapperMediaItem *item, ClapperReactableItemUpdatedFlags flags);
+
+G_GNUC_INTERNAL
+void clapper_reactables_manager_trigger_queue_item_added (ClapperReactablesManager *manager, ClapperMediaItem *item, guint index);
+
+G_GNUC_INTERNAL
+void clapper_reactables_manager_trigger_queue_item_removed (ClapperReactablesManager *manager, ClapperMediaItem *item, guint index);
+
+G_GNUC_INTERNAL
+void clapper_reactables_manager_trigger_queue_item_repositioned (ClapperReactablesManager *manager, guint before, guint after);
+
+G_GNUC_INTERNAL
+void clapper_reactables_manager_trigger_queue_cleared (ClapperReactablesManager *manager);
+
+G_GNUC_INTERNAL
+void clapper_reactables_manager_trigger_queue_progression_changed (ClapperReactablesManager *manager, ClapperQueueProgressionMode mode);
+
+G_END_DECLS
--- a/src/lib/clapper/clapper-reactables-manager.c
+++ b/src/lib/clapper/clapper-reactables-manager.c
@@ -0,0 +1,524 @@
+/* Clapper Playback Library
+ * Copyright (C) 2025 Rafał Dzięgiel <rafostar.github@gmail.com>
+ *
+ * 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
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include <gst/gst.h>
+
+#include "clapper-reactables-manager-private.h"
+#include "clapper-reactable.h"
+#include "clapper-bus-private.h"
+#include "clapper-player.h"
+#include "clapper-enhancer-proxy-list.h"
+#include "clapper-enhancer-proxy-private.h"
+#include "clapper-utils-private.h"
+
+#include "clapper-functionalities-availability.h"
+
+#if CLAPPER_WITH_ENHANCERS_LOADER
+#include "clapper-enhancers-loader-private.h"
+#endif
+
+#define CONFIG_STRUCTURE_NAME "config"
+
+#define GST_CAT_DEFAULT clapper_reactables_manager_debug
+GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
+
+struct _ClapperReactablesManager
+{
+  ClapperThreadedObject parent;
+
+  GstBus *bus;
+  GPtrArray *array;
+
+  gboolean prepare_called;
+};
+
+#define parent_class clapper_reactables_manager_parent_class
+G_DEFINE_TYPE (ClapperReactablesManager, clapper_reactables_manager, CLAPPER_TYPE_THREADED_OBJECT);
+
+typedef struct
+{
+  ClapperReactable *reactable;
+  ClapperEnhancerProxy *proxy;
+  GSettings *settings;
+} ClapperReactableManagerData;
+
+enum
+{
+  CLAPPER_REACTABLES_MANAGER_EVENT_INVALID = 0,
+  CLAPPER_REACTABLES_MANAGER_EVENT_STATE_CHANGED,
+  CLAPPER_REACTABLES_MANAGER_EVENT_POSITION_CHANGED,
+  CLAPPER_REACTABLES_MANAGER_EVENT_SPEED_CHANGED,
+  CLAPPER_REACTABLES_MANAGER_EVENT_VOLUME_CHANGED,
+  CLAPPER_REACTABLES_MANAGER_EVENT_MUTE_CHANGED,
+  CLAPPER_REACTABLES_MANAGER_EVENT_PLAYED_ITEM_CHANGED,
+  CLAPPER_REACTABLES_MANAGER_EVENT_ITEM_UPDATED,
+  CLAPPER_REACTABLES_MANAGER_EVENT_QUEUE_ITEM_ADDED,
+  CLAPPER_REACTABLES_MANAGER_EVENT_QUEUE_ITEM_REMOVED,
+  CLAPPER_REACTABLES_MANAGER_EVENT_QUEUE_ITEM_REPOSITIONED,
+  CLAPPER_REACTABLES_MANAGER_EVENT_QUEUE_CLEARED,
+  CLAPPER_REACTABLES_MANAGER_EVENT_QUEUE_PROGRESSION_CHANGED
+};
+
+enum
+{
+  CLAPPER_REACTABLES_MANAGER_QUARK_CONFIGURE = 0,
+  CLAPPER_REACTABLES_MANAGER_QUARK_EVENT,
+  CLAPPER_REACTABLES_MANAGER_QUARK_VALUE,
+  CLAPPER_REACTABLES_MANAGER_QUARK_EXTRA_VALUE
+};
+
+static ClapperBusQuark _quarks[] = {
+  {"configure", 0},
+  {"event", 0},
+  {"value", 0},
+  {"extra-value", 0},
+  {NULL, 0}
+};
+
+#define _EVENT(e) G_PASTE(CLAPPER_REACTABLES_MANAGER_EVENT_, e)
+#define _QUARK(q) (_quarks[CLAPPER_REACTABLES_MANAGER_QUARK_##q].quark)
+
+#define _BUS_POST_EVENT_SINGLE(event_id,lower,type,val) { \
+  GValue _value = G_VALUE_INIT;                           \
+  g_value_init (&_value, type);                           \
+  g_value_set_##lower (&_value, val);                     \
+  _bus_post_event (self, event_id, &_value, NULL); }
+
+#define _BUS_POST_EVENT_DUAL(event_id,lower1,type1,val1,lower2,type2,val2) { \
+  GValue _value1 = G_VALUE_INIT;                                             \
+  GValue _value2 = G_VALUE_INIT;                                             \
+  g_value_init (&_value1, type1);                                            \
+  g_value_init (&_value2, type2);                                            \
+  g_value_set_##lower1 (&_value1, val1);                                     \
+  g_value_set_##lower2 (&_value2, val2);                                     \
+  _bus_post_event (self, event_id, &_value1, &_value2); }
+
+void
+clapper_reactables_manager_initialize (void)
+{
+  gint i;
+
+  for (i = 0; _quarks[i].name; ++i)
+    _quarks[i].quark = g_quark_from_static_string (_quarks[i].name);
+}
+
+static void
+_settings_changed_cb (GSettings *settings, const gchar *key, ClapperReactableManagerData *data)
+{
+  GST_DEBUG_OBJECT (data->reactable, "Global setting \"%s\" changed", key);
+
+  /* Local settings are applied through bus events, so all that is
+   * needed here is a check to not overwrite locally set setting */
+  if (!clapper_enhancer_proxy_has_locally_set (data->proxy, key)) {
+    GVariant *variant = g_settings_get_value (settings, key);
+    GValue value = G_VALUE_INIT;
+
+    if (G_LIKELY (clapper_utils_set_value_from_variant (&value, variant))) {
+      g_object_set_property (G_OBJECT (data->reactable), key, &value);
+      g_value_unset (&value);
+    }
+
+    g_variant_unref (variant);
+  }
+}
+
+static inline void
+clapper_reactables_manager_handle_prepare (ClapperReactablesManager *self)
+{
+  ClapperPlayer *player;
+
+  GST_INFO_OBJECT (self, "Preparing reactable enhancers");
+  player = CLAPPER_PLAYER_CAST (gst_object_get_parent (GST_OBJECT_CAST (self)));
+
+  if (G_LIKELY (player != NULL)) {
+    ClapperEnhancerProxyList *proxies = clapper_player_get_enhancer_proxies (player);
+    guint i, n_proxies = clapper_enhancer_proxy_list_get_n_proxies (proxies);
+
+    for (i = 0; i < n_proxies; ++i) {
+      ClapperEnhancerProxy *proxy = clapper_enhancer_proxy_list_peek_proxy (proxies, i);
+      ClapperReactable *reactable = NULL;
+
+      if (!clapper_enhancer_proxy_target_has_interface (proxy, CLAPPER_TYPE_REACTABLE))
+        continue;
+
+#if CLAPPER_WITH_ENHANCERS_LOADER
+      reactable = CLAPPER_REACTABLE_CAST (
+          clapper_enhancers_loader_create_enhancer (proxy, CLAPPER_TYPE_REACTABLE));
+#endif
+
+      if (reactable) {
+        ClapperReactableManagerData *data;
+        GstStructure *config;
+
+        if (g_object_is_floating (reactable))
+          gst_object_ref_sink (reactable);
+
+        data = g_new (ClapperReactableManagerData, 1);
+        data->reactable = reactable;
+        data->proxy = gst_object_ref (proxy);
+        data->settings = clapper_enhancer_proxy_get_settings (proxy);
+
+        GST_TRACE_OBJECT (self, "Created data for reactable: %" GST_PTR_FORMAT, data->reactable);
+
+        /* Settings are stored in data in order for this signal to keep working */
+        if (data->settings)
+          g_signal_connect (data->settings, "changed", G_CALLBACK (_settings_changed_cb), data);
+
+        if ((config = clapper_enhancer_proxy_make_current_config (proxy))) {
+          clapper_enhancer_proxy_apply_config_to_enhancer (proxy, config, (GObject *) reactable);
+          gst_structure_free (config);
+        }
+
+        g_ptr_array_add (self->array, data);
+        gst_object_set_parent (GST_OBJECT_CAST (data->reactable), GST_OBJECT_CAST (player));
+      }
+    }
+
+    GST_INFO_OBJECT (self, "Prepared %i reactable enhancers", self->array->len);
+    gst_object_unref (player);
+  } else {
+    GST_ERROR_OBJECT (self, "Could not prepare reactable enhancers!");
+  }
+}
+
+static inline void
+clapper_reactables_manager_handle_configure (ClapperReactablesManager *self, const GstStructure *structure)
+{
+  const GValue *proxy_val, *config_val;
+  ClapperEnhancerProxy *proxy;
+  const GstStructure *config;
+  guint i;
+
+  proxy_val = gst_structure_id_get_value (structure, _QUARK (VALUE));
+  config_val = gst_structure_id_get_value (structure, _QUARK (EXTRA_VALUE));
+
+  proxy = CLAPPER_ENHANCER_PROXY_CAST (g_value_get_object (proxy_val));
+  config = gst_value_get_structure (config_val);
+
+  for (i = 0; i < self->array->len; ++i) {
+    ClapperReactableManagerData *data = g_ptr_array_index (self->array, i);
+
+    if (data->proxy == proxy) {
+      clapper_enhancer_proxy_apply_config_to_enhancer (data->proxy,
+          config, (GObject *) data->reactable);
+      break;
+    }
+  }
+}
+
+static inline void
+clapper_reactables_manager_handle_event (ClapperReactablesManager *self, const GstStructure *structure)
+{
+  const GValue *value = gst_structure_id_get_value (structure, _QUARK (VALUE));
+  const GValue *extra_value = gst_structure_id_get_value (structure, _QUARK (EXTRA_VALUE));
+  guint i, event_id;
+
+  if (G_UNLIKELY (!gst_structure_id_get (structure,
+      _QUARK (EVENT), G_TYPE_ENUM, &event_id, NULL))) {
+    GST_ERROR_OBJECT (self, "Could not read event ID");
+    return;
+  }
+
+  for (i = 0; i < self->array->len; ++i) {
+    ClapperReactableManagerData *data = g_ptr_array_index (self->array, i);
+    ClapperReactableInterface *reactable_iface = CLAPPER_REACTABLE_GET_IFACE (data->reactable);
+
+    switch (event_id) {
+      case _EVENT (STATE_CHANGED):
+        if (reactable_iface->state_changed)
+          reactable_iface->state_changed (data->reactable, g_value_get_int (value));
+        break;
+      case _EVENT (POSITION_CHANGED):
+        if (reactable_iface->position_changed)
+          reactable_iface->position_changed (data->reactable, g_value_get_double (value));
+        break;
+      case _EVENT (SPEED_CHANGED):
+        if (reactable_iface->speed_changed)
+          reactable_iface->speed_changed (data->reactable, g_value_get_double (value));
+        break;
+      case _EVENT (VOLUME_CHANGED):
+        if (reactable_iface->volume_changed)
+          reactable_iface->volume_changed (data->reactable, g_value_get_double (value));
+        break;
+      case _EVENT (MUTE_CHANGED):
+        if (reactable_iface->mute_changed)
+          reactable_iface->mute_changed (data->reactable, g_value_get_boolean (value));
+        break;
+      case _EVENT (PLAYED_ITEM_CHANGED):
+        if (reactable_iface->played_item_changed) {
+          reactable_iface->played_item_changed (data->reactable,
+              CLAPPER_MEDIA_ITEM_CAST (g_value_get_object (value)));
+        }
+        break;
+      case _EVENT (ITEM_UPDATED):
+        if (reactable_iface->item_updated) {
+          reactable_iface->item_updated (data->reactable,
+              CLAPPER_MEDIA_ITEM_CAST (g_value_get_object (value)),
+              g_value_get_flags (extra_value));
+        }
+        break;
+      case _EVENT (QUEUE_ITEM_ADDED):
+        if (reactable_iface->queue_item_added) {
+          reactable_iface->queue_item_added (data->reactable,
+              CLAPPER_MEDIA_ITEM_CAST (g_value_get_object (value)),
+              g_value_get_uint (extra_value));
+        }
+        break;
+      case _EVENT (QUEUE_ITEM_REMOVED):
+        if (reactable_iface->queue_item_removed) {
+          reactable_iface->queue_item_removed (data->reactable,
+              CLAPPER_MEDIA_ITEM_CAST (g_value_get_object (value)),
+              g_value_get_uint (extra_value));
+        }
+        break;
+      case _EVENT (QUEUE_ITEM_REPOSITIONED):
+        if (reactable_iface->queue_item_repositioned) {
+          reactable_iface->queue_item_repositioned (data->reactable,
+              g_value_get_uint (value),
+              g_value_get_uint (extra_value));
+        }
+        break;
+      case _EVENT (QUEUE_CLEARED):
+        if (reactable_iface->queue_cleared)
+          reactable_iface->queue_cleared (data->reactable);
+        break;
+      case _EVENT (QUEUE_PROGRESSION_CHANGED):
+        if (reactable_iface->queue_progression_changed)
+          reactable_iface->queue_progression_changed (data->reactable, g_value_get_int (value));
+        break;
+      default:
+        GST_ERROR_OBJECT (self, "Invalid event ID on reactables bus: %u", event_id);
+        break;
+    }
+  }
+}
+
+static gboolean
+_bus_message_func (GstBus *bus, GstMessage *msg, gpointer user_data G_GNUC_UNUSED)
+{
+  if (G_LIKELY (GST_MESSAGE_TYPE (msg) == GST_MESSAGE_APPLICATION)) {
+    ClapperReactablesManager *self = CLAPPER_REACTABLES_MANAGER_CAST (GST_MESSAGE_SRC (msg));
+    const GstStructure *structure = gst_message_get_structure (msg);
+    GQuark quark = gst_structure_get_name_id (structure);
+
+    if (quark == _QUARK (EVENT)) {
+      if (G_UNLIKELY (!self->prepare_called)) {
+        clapper_reactables_manager_handle_prepare (self);
+        self->prepare_called = TRUE;
+      }
+      clapper_reactables_manager_handle_event (self, structure);
+    } else if (quark == _QUARK (CONFIGURE)) {
+      clapper_reactables_manager_handle_configure (self, structure);
+    } else {
+      GST_ERROR_OBJECT (self, "Received invalid quark on reactables bus!");
+    }
+  }
+
+  return G_SOURCE_CONTINUE;
+}
+
+static void
+_bus_post_event (ClapperReactablesManager *self, guint event_id,
+    GValue *value, GValue *extra_value)
+{
+  GstStructure *structure = gst_structure_new_id (_QUARK (EVENT),
+      _QUARK (EVENT), G_TYPE_ENUM, event_id,
+      NULL);
+
+  if (value)
+    gst_structure_id_take_value (structure, _QUARK (VALUE), value);
+  if (extra_value)
+    gst_structure_id_take_value (structure, _QUARK (EXTRA_VALUE), extra_value);
+
+  gst_bus_post (self->bus, gst_message_new_application (
+      GST_OBJECT_CAST (self), structure));
+}
+
+/*
+ * clapper_reactables_manager_new:
+ *
+ * Returns: (transfer full): a new #ClapperReactablesManager instance.
+ */
+ClapperReactablesManager *
+clapper_reactables_manager_new (void)
+{
+  ClapperReactablesManager *reactables_manager;
+
+  reactables_manager = g_object_new (CLAPPER_TYPE_REACTABLES_MANAGER, NULL);
+  gst_object_ref_sink (reactables_manager);
+
+  return reactables_manager;
+}
+
+void
+clapper_reactables_manager_trigger_configure_take_config (ClapperReactablesManager *self,
+    ClapperEnhancerProxy *proxy, GstStructure *config)
+{
+  GstStructure *structure = gst_structure_new_id (_QUARK (CONFIGURE),
+      _QUARK (VALUE), G_TYPE_OBJECT, proxy, NULL);
+  GValue extra_value = G_VALUE_INIT;
+
+  g_value_init (&extra_value, GST_TYPE_STRUCTURE);
+  g_value_take_boxed (&extra_value, config);
+
+  gst_structure_id_take_value (structure, _QUARK (EXTRA_VALUE), &extra_value);
+
+  gst_bus_post (self->bus, gst_message_new_application (
+      GST_OBJECT_CAST (self), structure));
+}
+
+void
+clapper_reactables_manager_trigger_state_changed (ClapperReactablesManager *self, ClapperPlayerState state)
+{
+  _BUS_POST_EVENT_SINGLE (_EVENT (STATE_CHANGED), int, G_TYPE_INT, state);
+}
+
+void
+clapper_reactables_manager_trigger_position_changed (ClapperReactablesManager *self, gdouble position)
+{
+  _BUS_POST_EVENT_SINGLE (_EVENT (POSITION_CHANGED), double, G_TYPE_DOUBLE, position);
+}
+
+void
+clapper_reactables_manager_trigger_speed_changed (ClapperReactablesManager *self, gdouble speed)
+{
+  _BUS_POST_EVENT_SINGLE (_EVENT (SPEED_CHANGED), double, G_TYPE_DOUBLE, speed);
+}
+
+void
+clapper_reactables_manager_trigger_volume_changed (ClapperReactablesManager *self, gdouble volume)
+{
+  _BUS_POST_EVENT_SINGLE (_EVENT (VOLUME_CHANGED), double, G_TYPE_DOUBLE, volume);
+}
+
+void
+clapper_reactables_manager_trigger_mute_changed (ClapperReactablesManager *self, gboolean mute)
+{
+  _BUS_POST_EVENT_SINGLE (_EVENT (MUTE_CHANGED), boolean, G_TYPE_BOOLEAN, mute);
+}
+
+void
+clapper_reactables_manager_trigger_played_item_changed (ClapperReactablesManager *self, ClapperMediaItem *item)
+{
+  _BUS_POST_EVENT_SINGLE (_EVENT (PLAYED_ITEM_CHANGED), object, CLAPPER_TYPE_MEDIA_ITEM, item);
+}
+
+void
+clapper_reactables_manager_trigger_item_updated (ClapperReactablesManager *self, ClapperMediaItem *item, ClapperReactableItemUpdatedFlags _flags)
+{
+  _BUS_POST_EVENT_DUAL (_EVENT (ITEM_UPDATED), object, CLAPPER_TYPE_MEDIA_ITEM, item, flags, CLAPPER_TYPE_REACTABLE_ITEM_UPDATED_FLAGS, _flags);
+}
+
+void
+clapper_reactables_manager_trigger_queue_item_added (ClapperReactablesManager *self, ClapperMediaItem *item, guint index)
+{
+  _BUS_POST_EVENT_DUAL (_EVENT (QUEUE_ITEM_ADDED), object, CLAPPER_TYPE_MEDIA_ITEM, item, uint, G_TYPE_UINT, index);
+}
+
+void
+clapper_reactables_manager_trigger_queue_item_removed (ClapperReactablesManager *self, ClapperMediaItem *item, guint index)
+{
+  _BUS_POST_EVENT_DUAL (_EVENT (QUEUE_ITEM_REMOVED), object, CLAPPER_TYPE_MEDIA_ITEM, item, uint, G_TYPE_UINT, index);
+}
+
+void
+clapper_reactables_manager_trigger_queue_item_repositioned (ClapperReactablesManager *self, guint before, guint after)
+{
+  _BUS_POST_EVENT_DUAL (_EVENT (QUEUE_ITEM_REPOSITIONED), uint, G_TYPE_UINT, before, uint, G_TYPE_UINT, after);
+}
+
+void
+clapper_reactables_manager_trigger_queue_cleared (ClapperReactablesManager *self)
+{
+  _bus_post_event (self, _EVENT (QUEUE_CLEARED), NULL, NULL);
+}
+
+void
+clapper_reactables_manager_trigger_queue_progression_changed (ClapperReactablesManager *self, ClapperQueueProgressionMode mode)
+{
+  _BUS_POST_EVENT_SINGLE (_EVENT (QUEUE_PROGRESSION_CHANGED), int, G_TYPE_INT, mode);
+}
+
+static void
+_data_remove_func (ClapperReactableManagerData *data)
+{
+  GST_TRACE ("Removing data for reactable: %" GST_PTR_FORMAT, data->reactable);
+
+  g_clear_object (&data->settings);
+
+  gst_object_unparent (GST_OBJECT_CAST (data->reactable));
+  gst_object_unref (data->reactable);
+
+  gst_object_unref (data->proxy);
+  g_free (data);
+}
+
+static void
+clapper_reactables_manager_thread_start (ClapperThreadedObject *threaded_object)
+{
+  ClapperReactablesManager *self = CLAPPER_REACTABLES_MANAGER_CAST (threaded_object);
+
+  GST_TRACE_OBJECT (threaded_object, "Reactables manager thread start");
+
+  self->array = g_ptr_array_new_with_free_func (
+      (GDestroyNotify) _data_remove_func);
+
+  self->bus = gst_bus_new ();
+  gst_bus_add_watch (self->bus, (GstBusFunc) _bus_message_func, NULL);
+}
+
+static void
+clapper_reactables_manager_thread_stop (ClapperThreadedObject *threaded_object)
+{
+  ClapperReactablesManager *self = CLAPPER_REACTABLES_MANAGER_CAST (threaded_object);
+
+  GST_TRACE_OBJECT (self, "Reactables manager thread stop");
+
+  gst_bus_set_flushing (self->bus, TRUE);
+  gst_bus_remove_watch (self->bus);
+  gst_clear_object (&self->bus);
+
+  g_ptr_array_unref (self->array);
+}
+
+static void
+clapper_reactables_manager_init (ClapperReactablesManager *self)
+{
+}
+
+static void
+clapper_reactables_manager_finalize (GObject *object)
+{
+  GST_TRACE_OBJECT (object, "Finalize");
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+clapper_reactables_manager_class_init (ClapperReactablesManagerClass *klass)
+{
+  GObjectClass *gobject_class = (GObjectClass *) klass;
+  ClapperThreadedObjectClass *threaded_object = (ClapperThreadedObjectClass *) klass;
+
+  GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "clapperreactablesmanager", 0,
+      "Clapper Reactables Manager");
+
+  gobject_class->finalize = clapper_reactables_manager_finalize;
+
+  threaded_object->thread_start = clapper_reactables_manager_thread_start;
+  threaded_object->thread_stop = clapper_reactables_manager_thread_stop;
+}
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Rafał Dzięgiel	16430c4c66	clapper-app: Allow usage of all reactable enhancers Enable and use all found enhancer plugins on the system	2025-06-22 13:36:09 +02:00
Rafał Dzięgiel	9f1102bafd	clapper: Add ability to enable/disable creation of given enhancer Allow apps to enable or disable given enhancer instances from being created. Also as a safely measure, by default only enable enhancers that work on-demand (extractables) and disable others (reactables).	2025-06-22 13:35:57 +02:00
Rafał Dzięgiel	7b4a19659b	Merge pull request #561 from musicinmybrain/remote-only-fsf Update LGPL-2.1-or-later notices and text for remote-only FSF	2025-06-19 12:43:50 +02:00
Benjamin A. Beasley	8fe46d315c	Update LGPL-2.1-or-later license text for remote-only FSF The Free Software Foundation is now remote-only, and no longer has a street address. Updated license text is from https://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt.	2025-06-14 11:35:04 -04:00
Benjamin A. Beasley	b5cc171803	Update LGPL-2.1-or-later license notices for remote-only FSF The Free Software Foundation is now remote-only, and no longer has a street address. Updated license notice text is from https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html#SEC4.	2025-06-14 11:35:02 -04:00
Rafał Dzięgiel	0f929014d5	clapper: reactable: Fix invalid assert check Fix a copy-paste bug. There is no item to check in this function.	2025-06-09 20:57:45 +02:00
Rafał Dzięgiel	f3b120f451	Merge pull request #559 from Rafostar/reactable clapper: Add "Reactable" interface	2025-06-09 20:52:15 +02:00
Rafał Dzięgiel	c354d31436	clapper: reactable: Inform which properties were updated	2025-06-09 20:21:39 +02:00
Rafał Dzięgiel	c0b360dc0f	clapper-app: Add support for MPRIS enhancer	2025-06-09 18:37:40 +02:00
Rafał Dzięgiel	a6ca0b726c	clapper: Implement reactables manager An object for managing instances of reactable type of enhancers. Based on/similar to features manager which along with Clapper features objects gets deprecated in favour of reactables.	2025-06-09 18:36:06 +02:00
Rafał Dzięgiel	976bcc338f	clapper: Add "Reactable" interface An interface for creating enhancers that react to the playback and/or events that should influence it.	2025-06-08 17:46:35 +02:00
Rafał Dzięgiel	6273446817	Merge pull request #558 from Rafostar/tagged clapper: Add taglist to media items	2025-06-08 17:43:12 +02:00