Implement the window::urgent event

The window::urgent event is emitted when a container becomes urgent or
loses its urgent status.

docs/ipc

@@ -723,6 +723,7 @@ This event consists of a single serialized map containing a property
 * +fullscreen_mode+ - the window has entered or exited fullscreen mode
 * +move+ - the window has changed its position in the tree
 * +floating+ - the window has transitioned to or from floating
+* +urgent+ - the window has become urgent or lost its urgent status
 
 Additionally a +container (object)+ field will be present, which consists
 of the window's parent container. Be aware that for the "new" event, the

src/con.c

@@ -231,6 +231,7 @@ void con_focus(Con *con) {
         con->urgent = false;
         con_update_parents_urgency(con);
         workspace_update_urgent_flag(con_get_workspace(con));
+        ipc_send_window_event("urgent", con);
     }
 }
 
@@ -1599,14 +1600,16 @@ void con_set_urgency(Con *con, bool urgent) {
 
     con_update_parents_urgency(con);
 
-    if (con->urgent == urgent)
-        LOG("Urgency flag changed to %d\n", con->urgent);
-
     Con *ws;
     /* Set the urgency flag on the workspace, if a workspace could be found
      * (for dock clients, that is not the case). */
     if ((ws = con_get_workspace(con)) != NULL)
         workspace_update_urgent_flag(ws);
+
+    if (con->urgent == urgent) {
+        LOG("Urgency flag changed to %d\n", con->urgent);
+        ipc_send_window_event("urgent", con);
+    }
 }
 
 /*

src/workspace.c

@@ -320,11 +320,14 @@ static void workspace_reassign_sticky(Con *con) {
 static void workspace_defer_update_urgent_hint_cb(EV_P_ ev_timer *w, int revents) {
     Con *con = w->data;
 
+    if (con->urgent) {
         DLOG("Resetting urgency flag of con %p by timer\n", con);
         con->urgent = false;
         con_update_parents_urgency(con);
         workspace_update_urgent_flag(con_get_workspace(con));
+        ipc_send_window_event("urgent", con);
         tree_render();
+    }
 
     ev_timer_stop(main_loop, con->urgency_timer);
     FREE(con->urgency_timer);
@@ -380,6 +383,7 @@ static void _workspace_show(Con *workspace) {
      * focus and thereby immediately destroy it */
     if (next->urgent && (int)(config.workspace_urgency_timer * 1000) > 0) {
         /* focus for now… */
+        next->urgent = false;
         con_focus(next);
 
         /* … but immediately reset urgency flags; they will be set to false by

testcases/t/232-ipc-window-urgent.t

@@ -0,0 +1,68 @@
+#!perl
+# vim:ts=4:sw=4:expandtab
+#
+# Please read the following documents before working on tests:
+# • http://build.i3wm.org/docs/testsuite.html
+#   (or docs/testsuite)
+#
+# • http://build.i3wm.org/docs/lib-i3test.html
+#   (alternatively: perldoc ./testcases/lib/i3test.pm)
+#
+# • http://build.i3wm.org/docs/ipc.html
+#   (or docs/ipc)
+#
+# • http://onyxneon.com/books/modern_perl/modern_perl_a4.pdf
+#   (unless you are already familiar with Perl)
+#
+# Test that the window::urgent event works correctly. The window::urgent event
+# should be emitted when a window becomes urgent or loses its urgent status.
+#
+use i3test;
+
+my $config = <<EOT;
+# i3 config file (v4)
+font -misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1
+
+force_display_urgency_hint 0ms
+EOT
+
+my $i3 = i3(get_socket_path());
+$i3->connect()->recv;
+
+my $cv;
+$i3->subscribe({
+    window => sub {
+        my ($event) = @_;
+        $cv->send($event) if $event->{change} eq 'urgent';
+    }
+})->recv;
+
+my $t;
+$t = AnyEvent->timer(
+    after => 0.5,
+    cb => sub {
+        $cv->send(0);
+    }
+);
+
+$cv = AnyEvent->condvar;
+fresh_workspace;
+my $win = open_window;
+my $dummy_win = open_window;
+
+$win->add_hint('urgency');
+my $event = $cv->recv;
+
+isnt($event, 0, 'an urgent con should emit the window::urgent event');
+is($event->{container}->{window}, $win->{id}, 'the event should contain information about the window');
+is($event->{container}->{urgent}, 1, 'the container should be urgent');
+
+$cv = AnyEvent->condvar;
+$win->delete_hint('urgency');
+my $event = $cv->recv;
+
+isnt($event, 0, 'an urgent con should emit the window::urgent event');
+is($event->{container}->{window}, $win->{id}, 'the event should contain information about the window');
+is($event->{container}->{urgent}, 0, 'the container should not be urgent');
+
+done_testing;