Deprecate seat idle_wake

Sway has two knobs to control idling:

- seat idle_inhibit: when the seat is active (ie. not idle), this
  extends the active state. When the seat is idle, this is
  ignored.
- seat idle_wake: when the seat is idle, this wakes up the seat.
  When the seat is active, this is ignored.

The motivation for the deprecation is two-fold:

- The concept of "seat idle state" is ill-defined. Each idle-notify-v1
  client will pass a different idle timeout. With the old logic, a
  seat was declared idle if and only if all idle-notify-v1 timeouts have
  expired. However, if only a portion of the timeouts have expired,
  then some clients would wake up, and the rest would stay active.
  This is inconsistent with the definition of idle_inhibit/idle_wake:
  idle_inhibit was used for clients which are waking up.
- It never worked properly with the new idle-notify-v1 protocol
  and no-one noticed. Only the legacy KDE idle protocol is taken
  into account, but that protocol is not used anymore.

3 files changed, 10 insertions, 21 deletions

diff --git a/sway/commands/seat/idle.c b/sway/commands/seat/idle.c
index 82428f2c..62b94db2 100644
--- a/sway/commands/seat/idle.c
+++ b/sway/commands/seat/idle.c
@@ -3,6 +3,7 @@
 #include <string.h>
 #include <strings.h>
 #include <stdint.h>
+#include "log.h"
 #include "sway/commands.h"
 #include "sway/config.h"
 #include "sway/input/seat.h"
@@ -69,5 +70,10 @@ struct cmd_results *seat_cmd_idle_wake(int argc, char **argv) {
                 return cmd_results_new(CMD_FAILURE, "Invalid idle source");
         }
         config->handler_context.seat_config->idle_wake_sources = sources;
+        sway_log(SWAY_INFO, "Warning: seat idle_wake is deprecated");
+        if (config->reading) {
+                config_add_swaynag_warning("seat idle_wake is deprecated. "
+                        "Only seat idle_inhibit is supported.");
+        }
         return cmd_results_new(CMD_SUCCESS, NULL);
 }
diff --git a/sway/input/seat.c b/sway/input/seat.c
index 82f4eb5f..a84e4d52 100644
--- a/sway/input/seat.c
+++ b/sway/input/seat.c
@@ -100,22 +100,11 @@ void seat_destroy(struct sway_seat *seat) {
 
 void seat_idle_notify_activity(struct sway_seat *seat,
                 enum sway_input_idle_source source) {
-        uint32_t mask = seat->idle_inhibit_sources;
-        struct wlr_idle_timeout *timeout;
-        int ntimers = 0, nidle = 0;
-        wl_list_for_each(timeout, &server.idle->idle_timers, link) {
-                ++ntimers;
-                if (timeout->idle_state) {
-                        ++nidle;
-                }
-        }
-        if (nidle == ntimers) {
-                mask = seat->idle_wake_sources;
-        }
-        if ((source & mask) > 0) {
-                wlr_idle_notify_activity(server.idle, seat->wlr_seat);
-                wlr_idle_notifier_v1_notify_activity(server.idle_notifier_v1, seat->wlr_seat);
+        if ((source & seat->idle_inhibit_sources) == 0) {
+                return;
         }
+        wlr_idle_notify_activity(server.idle, seat->wlr_seat);
+        wlr_idle_notifier_v1_notify_activity(server.idle_notifier_v1, seat->wlr_seat);
 }
 
 /**
diff --git a/sway/sway-input.5.scd b/sway/sway-input.5.scd
index 082b68c2..8a1f2700 100644
--- a/sway/sway-input.5.scd
+++ b/sway/sway-input.5.scd
@@ -268,12 +268,6 @@ correct seat.
         "keyboard", "pointer", "touchpad", "touch", "tablet_pad", "tablet_tool",
         and "switch". The default behavior is to prevent idle on any event.
 
-*seat* <name> idle_wake <sources...>
-        Sets the set of input event sources which can wake the seat from
-        its idle state, as a space separated list of source names. Valid names are
-        "keyboard", "pointer", "touchpad", "touch", "tablet_pad", "tablet_tool",
-        and "switch". The default behavior is to wake from idle on any event.
-
 *seat* <name> keyboard_grouping none|smart
         Set how the keyboards in the seat are grouped together. Currently, there
         are two options. _none_ will disable all keyboard grouping. This will make