Bindings use advised keyboard repeat parameters

Now 'repeat_delay' and 'repeat_rate' control the initial delay
and rate (per second) of repeated binding invocations.

If the repeat delay is zero, binding repetition is disabled.
When the repeat rate is zero, the binding is repeated exactly
once, assuming no other key events intervene.

include/sway/input/keyboard.h

@@ -41,8 +41,6 @@ struct sway_keyboard {
 
 	struct wl_event_source *key_repeat_source;
 	struct sway_binding *repeat_binding;
-	int key_repeat_initial_delay; // first key repeat event delay, in ms
-	int key_repeat_step_delay; // subsequent repeat delay, in ms
 };
 
 struct sway_keyboard *sway_keyboard_create(struct sway_seat *seat,

sway/input/keyboard.c

@@ -285,10 +285,10 @@ static void handle_keyboard_key(struct wl_listener *listener, void *data) {
 	}
 
 	// Set up (or clear) keyboard repeat for a pressed binding
-	if (next_repeat_binding) {
+	if (next_repeat_binding && wlr_device->keyboard->repeat_info.delay > 0) {
 		keyboard->repeat_binding = next_repeat_binding;
 		if (wl_event_source_timer_update(keyboard->key_repeat_source,
-				keyboard->key_repeat_initial_delay) < 0) {
+				wlr_device->keyboard->repeat_info.delay) < 0) {
 			wlr_log(WLR_DEBUG, "failed to set key repeat timer");
 		}
 	} else if (keyboard->repeat_binding) {
@@ -321,12 +321,16 @@ static void handle_keyboard_key(struct wl_listener *listener, void *data) {
 
 static int handle_keyboard_repeat(void *data) {
 	struct sway_keyboard *keyboard = (struct sway_keyboard *)data;
+	struct wlr_keyboard *wlr_device =
+			keyboard->seat_device->input_device->wlr_device->keyboard;
 	if (keyboard->repeat_binding) {
+		if (wlr_device->repeat_info.rate > 0) {
 			// We queue the next event first, as the command might cancel it
 			if (wl_event_source_timer_update(keyboard->key_repeat_source,
-				keyboard->key_repeat_step_delay) < 0) {
+					1000 / wlr_device->repeat_info.rate) < 0) {
 				wlr_log(WLR_DEBUG, "failed to update key repeat timer");
 			}
+		}
 
 		seat_execute_command(keyboard->seat_device->sway_seat,
 				keyboard->repeat_binding);
@@ -362,8 +366,6 @@ struct sway_keyboard *sway_keyboard_create(struct sway_seat *seat,
 
 	keyboard->key_repeat_source = wl_event_loop_add_timer(server.wl_event_loop,
 			handle_keyboard_repeat, keyboard);
-	keyboard->key_repeat_initial_delay = 660;
-	keyboard->key_repeat_step_delay = 40;
 
 	return keyboard;
 }