3 files changed, 109 insertions, 1 deletions

diff --git a/backend/CMakeLists.txt b/backend/CMakeLists.txt
index 6ffa2042..9594c318 100644
--- a/backend/CMakeLists.txt
+++ b/backend/CMakeLists.txt
@@ -20,6 +20,7 @@ add_library(wlr-backend
     libinput/pointer.c
     libinput/touch.c
     libinput/tablet_tool.c
+    libinput/tablet_pad.c
 
     multi/backend.c
     backend.c
diff --git a/backend/libinput/events.c b/backend/libinput/events.c
index 8ebec63b..2e7cc541 100644
--- a/backend/libinput/events.c
+++ b/backend/libinput/events.c
@@ -91,7 +91,10 @@ static void handle_device_added(struct wlr_backend_state *state,
 		wl_signal_emit(&state->backend->events.input_add, wlr_device);
 	}
 	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_TABLET_PAD)) {
-		// TODO
+		struct wlr_input_device *wlr_device = allocate_device(state,
+				device, devices, WLR_INPUT_DEVICE_TABLET_PAD);
+		wlr_device->tablet_pad = wlr_libinput_tablet_pad_create(device);
+		wl_signal_emit(&state->backend->events.input_add, wlr_device);
 	}
 	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_GESTURE)) {
 		// TODO
@@ -169,6 +172,15 @@ void wlr_libinput_event(struct wlr_backend_state *state,
 	case LIBINPUT_EVENT_TABLET_TOOL_BUTTON:
 		handle_tablet_tool_button(event, device);
 		break;
+	case LIBINPUT_EVENT_TABLET_PAD_BUTTON:
+		handle_tablet_pad_button(event, device);
+		break;
+	case LIBINPUT_EVENT_TABLET_PAD_RING:
+		handle_tablet_pad_ring(event, device);
+		break;
+	case LIBINPUT_EVENT_TABLET_PAD_STRIP:
+		handle_tablet_pad_strip(event, device);
+		break;
 	default:
 		wlr_log(L_DEBUG, "Unknown libinput event %d", event_type);
 		break;
diff --git a/backend/libinput/tablet_pad.c b/backend/libinput/tablet_pad.c
new file mode 100644
index 00000000..ee7c82f8
--- /dev/null
+++ b/backend/libinput/tablet_pad.c
@@ -0,0 +1,95 @@
+#include <stdlib.h>
+#include <assert.h>
+#include <libinput.h>
+#include <wlr/session.h>
+#include <wlr/types.h>
+#include <wlr/common/list.h>
+#include "backend/libinput.h"
+#include "common/log.h"
+#include "types.h"
+
+struct wlr_tablet_pad *wlr_libinput_tablet_pad_create(
+		struct libinput_device *device) {
+	assert(device);
+	return wlr_tablet_pad_create(NULL, NULL);
+}
+
+void handle_tablet_pad_button(struct libinput_event *event,
+		struct libinput_device *device) {
+	struct wlr_input_device *dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_TABLET_PAD, device);
+	if (!dev) {
+		wlr_log(L_DEBUG, "Got a tablet pad event for a device with no tablet pad?");
+		return;
+	}
+	struct libinput_event_tablet_pad *pevent =
+		libinput_event_get_tablet_pad_event(event);
+	struct wlr_tablet_pad_button *wlr_event =
+		calloc(1, sizeof(struct wlr_tablet_pad_button));
+	wlr_event->time_sec = libinput_event_tablet_pad_get_time(pevent);
+	wlr_event->time_usec = libinput_event_tablet_pad_get_time_usec(pevent);
+	wlr_event->button = libinput_event_tablet_pad_get_button_number(pevent);
+	switch (libinput_event_tablet_pad_get_button_state(pevent)) {
+	case LIBINPUT_BUTTON_STATE_PRESSED:
+		wlr_event->state = WLR_BUTTON_PRESSED;
+		break;
+	case LIBINPUT_BUTTON_STATE_RELEASED:
+		wlr_event->state = WLR_BUTTON_RELEASED;
+		break;
+	}
+	wl_signal_emit(&dev->tablet_pad->events.button, wlr_event);
+}
+
+void handle_tablet_pad_ring(struct libinput_event *event,
+		struct libinput_device *device) {
+	struct wlr_input_device *dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_TABLET_PAD, device);
+	if (!dev) {
+		wlr_log(L_DEBUG, "Got a tablet pad event for a device with no tablet pad?");
+		return;
+	}
+	struct libinput_event_tablet_pad *pevent =
+		libinput_event_get_tablet_pad_event(event);
+	struct wlr_tablet_pad_ring *wlr_event =
+		calloc(1, sizeof(struct wlr_tablet_pad_ring));
+	wlr_event->time_sec = libinput_event_tablet_pad_get_time(pevent);
+	wlr_event->time_usec = libinput_event_tablet_pad_get_time_usec(pevent);
+	wlr_event->ring = libinput_event_tablet_pad_get_ring_number(pevent);
+	wlr_event->position = libinput_event_tablet_pad_get_ring_position(pevent);
+	switch (libinput_event_tablet_pad_get_ring_source(pevent)) {
+	case LIBINPUT_TABLET_PAD_RING_SOURCE_UNKNOWN:
+		wlr_event->source = WLR_TABLET_PAD_RING_SOURCE_UNKNOWN;
+		break;
+	case LIBINPUT_TABLET_PAD_RING_SOURCE_FINGER:
+		wlr_event->source = WLR_TABLET_PAD_RING_SOURCE_FINGER;
+		break;
+	}
+	wl_signal_emit(&dev->tablet_pad->events.ring, wlr_event);
+}
+
+void handle_tablet_pad_strip(struct libinput_event *event,
+		struct libinput_device *device) {
+	struct wlr_input_device *dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_TABLET_PAD, device);
+	if (!dev) {
+		wlr_log(L_DEBUG, "Got a tablet pad event for a device with no tablet pad?");
+		return;
+	}
+	struct libinput_event_tablet_pad *pevent =
+		libinput_event_get_tablet_pad_event(event);
+	struct wlr_tablet_pad_strip *wlr_event =
+		calloc(1, sizeof(struct wlr_tablet_pad_strip));
+	wlr_event->time_sec = libinput_event_tablet_pad_get_time(pevent);
+	wlr_event->time_usec = libinput_event_tablet_pad_get_time_usec(pevent);
+	wlr_event->strip = libinput_event_tablet_pad_get_strip_number(pevent);
+	wlr_event->position = libinput_event_tablet_pad_get_strip_position(pevent);
+	switch (libinput_event_tablet_pad_get_strip_source(pevent)) {
+	case LIBINPUT_TABLET_PAD_STRIP_SOURCE_UNKNOWN:
+		wlr_event->source = WLR_TABLET_PAD_STRIP_SOURCE_UNKNOWN;
+		break;
+	case LIBINPUT_TABLET_PAD_STRIP_SOURCE_FINGER:
+		wlr_event->source = WLR_TABLET_PAD_STRIP_SOURCE_FINGER;
+		break;
+	}
+	wl_signal_emit(&dev->tablet_pad->events.strip, wlr_event);
+}