backend/libinput: send hold gesture events

Receive hold gesture events from libinput and emit the appropiate
wlr_pointer signal.

backend/libinput/events.c

@@ -316,6 +316,14 @@ void handle_libinput_event(struct wlr_libinput_backend *backend,
 	case LIBINPUT_EVENT_GESTURE_PINCH_END:
 		handle_pointer_pinch_end(event, libinput_dev);
 		break;
+#if LIBINPUT_HAS_HOLD_GESTURES
+	case LIBINPUT_EVENT_GESTURE_HOLD_BEGIN:
+		handle_pointer_hold_begin(event, libinput_dev);
+		break;
+	case LIBINPUT_EVENT_GESTURE_HOLD_END:
+		handle_pointer_hold_end(event, libinput_dev);
+		break;
+#endif
 	default:
 		wlr_log(WLR_DEBUG, "Unknown libinput event %d", event_type);
 		break;

backend/libinput/pointer.c

@@ -260,3 +260,41 @@ void handle_pointer_pinch_end(struct libinput_event *event,
 	};
 	wlr_signal_emit_safe(&wlr_dev->pointer->events.pinch_end, &wlr_event);
 }
+
+void handle_pointer_hold_begin(struct libinput_event *event,
+		struct libinput_device *libinput_dev) {
+	struct wlr_input_device *wlr_dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_POINTER, libinput_dev);
+	if (!wlr_dev) {
+		wlr_log(WLR_DEBUG, "Got a pointer gesture event for a device with no pointers?");
+		return;
+	}
+	struct libinput_event_gesture *gevent =
+		libinput_event_get_gesture_event(event);
+	struct wlr_event_pointer_hold_begin wlr_event = {
+		.device = wlr_dev,
+		.time_msec =
+			usec_to_msec(libinput_event_gesture_get_time_usec(gevent)),
+		.fingers = libinput_event_gesture_get_finger_count(gevent),
+	};
+	wlr_signal_emit_safe(&wlr_dev->pointer->events.hold_begin, &wlr_event);
+}
+
+void handle_pointer_hold_end(struct libinput_event *event,
+		struct libinput_device *libinput_dev) {
+	struct wlr_input_device *wlr_dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_POINTER, libinput_dev);
+	if (!wlr_dev) {
+		wlr_log(WLR_DEBUG, "Got a pointer gesture event for a device with no pointers?");
+		return;
+	}
+	struct libinput_event_gesture *gevent =
+		libinput_event_get_gesture_event(event);
+	struct wlr_event_pointer_hold_end wlr_event = {
+		.device = wlr_dev,
+		.time_msec =
+			usec_to_msec(libinput_event_gesture_get_time_usec(gevent)),
+		.cancelled = libinput_event_gesture_get_cancelled(gevent),
+	};
+	wlr_signal_emit_safe(&wlr_dev->pointer->events.hold_end, &wlr_event);
+}

include/backend/libinput.h

@@ -66,6 +66,10 @@ void handle_pointer_pinch_update(struct libinput_event *event,
 		struct libinput_device *device);
 void handle_pointer_pinch_end(struct libinput_event *event,
 		struct libinput_device *device);
+void handle_pointer_hold_begin(struct libinput_event *event,
+		struct libinput_device *device);
+void handle_pointer_hold_end(struct libinput_event *event,
+		struct libinput_device *device);
 
 struct wlr_switch *create_libinput_switch(
 		struct libinput_device *device);