Implement wlr_tablet_tool

3 files changed, 171 insertions, 1 deletions

diff --git a/backend/CMakeLists.txt b/backend/CMakeLists.txt
index 8272e039..6ffa2042 100644
--- a/backend/CMakeLists.txt
+++ b/backend/CMakeLists.txt
@@ -19,6 +19,7 @@ add_library(wlr-backend
     libinput/keyboard.c
     libinput/pointer.c
     libinput/touch.c
+    libinput/tablet_tool.c
 
     multi/backend.c
     backend.c
diff --git a/backend/libinput/events.c b/backend/libinput/events.c
index f8413dae..8ebec63b 100644
--- a/backend/libinput/events.c
+++ b/backend/libinput/events.c
@@ -85,7 +85,10 @@ 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_TOOL)) {
-		// TODO
+		struct wlr_input_device *wlr_device = allocate_device(state,
+				device, devices, WLR_INPUT_DEVICE_TABLET_TOOL);
+		wlr_device->tablet_tool = wlr_libinput_tablet_tool_create(device);
+		wl_signal_emit(&state->backend->events.input_add, wlr_device);
 	}
 	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_TABLET_PAD)) {
 		// TODO
@@ -154,6 +157,18 @@ void wlr_libinput_event(struct wlr_backend_state *state,
 	case LIBINPUT_EVENT_TOUCH_FRAME:
 		// no-op (at least for now)
 		break;
+	case LIBINPUT_EVENT_TABLET_TOOL_AXIS:
+		handle_tablet_tool_axis(event, device);
+		break;
+	case LIBINPUT_EVENT_TABLET_TOOL_PROXIMITY:
+		handle_tablet_tool_proximity(event, device);
+		break;
+	case LIBINPUT_EVENT_TABLET_TOOL_TIP:
+		handle_tablet_tool_tip(event, device);
+		break;
+	case LIBINPUT_EVENT_TABLET_TOOL_BUTTON:
+		handle_tablet_tool_button(event, device);
+		break;
 	default:
 		wlr_log(L_DEBUG, "Unknown libinput event %d", event_type);
 		break;
diff --git a/backend/libinput/tablet_tool.c b/backend/libinput/tablet_tool.c
new file mode 100644
index 00000000..276c263c
--- /dev/null
+++ b/backend/libinput/tablet_tool.c
@@ -0,0 +1,154 @@
+#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_tool *wlr_libinput_tablet_tool_create(
+		struct libinput_device *device) {
+	assert(device);
+	return wlr_tablet_tool_create(NULL, NULL);
+}
+
+void handle_tablet_tool_axis(struct libinput_event *event,
+		struct libinput_device *device) {
+	struct wlr_input_device *dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_TABLET_TOOL, device);
+	if (!dev) {
+		wlr_log(L_DEBUG, "Got a tablet tool event for a device with no tablet tools?");
+		return;
+	}
+	struct libinput_event_tablet_tool *tevent =
+		libinput_event_get_tablet_tool_event(event);
+	struct wlr_tablet_tool_axis *wlr_event =
+		calloc(1, sizeof(struct wlr_tablet_tool_axis));
+	wlr_event->time_sec = libinput_event_tablet_tool_get_time(tevent);
+	wlr_event->time_usec = libinput_event_tablet_tool_get_time_usec(tevent);
+	libinput_device_get_size(device, &wlr_event->width_mm, &wlr_event->height_mm);
+	if (libinput_event_tablet_tool_x_has_changed(tevent)) {
+		wlr_event->updated_axes |= WLR_TABLET_TOOL_AXIS_X;
+		wlr_event->x_mm = libinput_event_tablet_tool_get_x(tevent);
+	}
+	if (libinput_event_tablet_tool_y_has_changed(tevent)) {
+		wlr_event->updated_axes |= WLR_TABLET_TOOL_AXIS_Y;
+		wlr_event->y_mm = libinput_event_tablet_tool_get_y(tevent);
+	}
+	if (libinput_event_tablet_tool_pressure_has_changed(tevent)) {
+		wlr_event->updated_axes |= WLR_TABLET_TOOL_AXIS_PRESSURE;
+		wlr_event->pressure = libinput_event_tablet_tool_get_pressure(tevent);
+	}
+	if (libinput_event_tablet_tool_distance_has_changed(tevent)) {
+		wlr_event->updated_axes |= WLR_TABLET_TOOL_AXIS_DISTANCE;
+		wlr_event->distance = libinput_event_tablet_tool_get_distance(tevent);
+	}
+	if (libinput_event_tablet_tool_tilt_x_has_changed(tevent)) {
+		wlr_event->updated_axes |= WLR_TABLET_TOOL_AXIS_TILT_X;
+		wlr_event->tilt_x = libinput_event_tablet_tool_get_tilt_x(tevent);
+	}
+	if (libinput_event_tablet_tool_tilt_y_has_changed(tevent)) {
+		wlr_event->updated_axes |= WLR_TABLET_TOOL_AXIS_TILT_Y;
+		wlr_event->tilt_y = libinput_event_tablet_tool_get_tilt_y(tevent);
+	}
+	if (libinput_event_tablet_tool_rotation_has_changed(tevent)) {
+		wlr_event->updated_axes |= WLR_TABLET_TOOL_AXIS_ROTATION;
+		wlr_event->rotation = libinput_event_tablet_tool_get_rotation(tevent);
+	}
+	if (libinput_event_tablet_tool_slider_has_changed(tevent)) {
+		wlr_event->updated_axes |= WLR_TABLET_TOOL_AXIS_SLIDER;
+		wlr_event->slider = libinput_event_tablet_tool_get_slider_position(tevent);
+	}
+	if (libinput_event_tablet_tool_wheel_has_changed(tevent)) {
+		wlr_event->updated_axes |= WLR_TABLET_TOOL_AXIS_WHEEL;
+		wlr_event->wheel_delta = libinput_event_tablet_tool_get_wheel_delta(tevent);
+	}
+	wl_signal_emit(&dev->tablet_tool->events.axis, wlr_event);
+}
+
+void handle_tablet_tool_proximity(struct libinput_event *event,
+		struct libinput_device *device) {
+	struct wlr_input_device *dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_TABLET_TOOL, device);
+	if (!dev) {
+		wlr_log(L_DEBUG, "Got a tablet tool event for a device with no tablet tools?");
+		return;
+	}
+	// Proximity events contain axis information. We update this information
+	// before we send the proximity event
+	handle_tablet_tool_axis(event, device);
+	struct libinput_event_tablet_tool *tevent =
+		libinput_event_get_tablet_tool_event(event);
+	struct wlr_tablet_tool_proximity *wlr_event =
+		calloc(1, sizeof(struct wlr_tablet_tool_proximity));
+	wlr_event->time_sec = libinput_event_tablet_tool_get_time(tevent);
+	wlr_event->time_usec = libinput_event_tablet_tool_get_time_usec(tevent);
+	switch (libinput_event_tablet_tool_get_proximity_state(tevent)) {
+	case LIBINPUT_TABLET_TOOL_PROXIMITY_STATE_OUT:
+		wlr_event->state = WLR_TABLET_TOOL_PROXIMITY_OUT;
+		break;
+	case LIBINPUT_TABLET_TOOL_PROXIMITY_STATE_IN:
+		wlr_event->state = WLR_TABLET_TOOL_PROXIMITY_IN;
+		break;
+	}
+	wl_signal_emit(&dev->tablet_tool->events.proximity, wlr_event);
+}
+
+void handle_tablet_tool_tip(struct libinput_event *event,
+		struct libinput_device *device) {
+	struct wlr_input_device *dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_TABLET_TOOL, device);
+	if (!dev) {
+		wlr_log(L_DEBUG, "Got a tablet tool event for a device with no tablet tools?");
+		return;
+	}
+	// Tip events contain axis information. We update this information
+	// before we send the proximity event
+	handle_tablet_tool_axis(event, device);
+	struct libinput_event_tablet_tool *tevent =
+		libinput_event_get_tablet_tool_event(event);
+	struct wlr_tablet_tool_tip *wlr_event =
+		calloc(1, sizeof(struct wlr_tablet_tool_tip));
+	wlr_event->time_sec = libinput_event_tablet_tool_get_time(tevent);
+	wlr_event->time_usec = libinput_event_tablet_tool_get_time_usec(tevent);
+	switch (libinput_event_tablet_tool_get_tip_state(tevent)) {
+	case LIBINPUT_TABLET_TOOL_TIP_UP:
+		wlr_event->state = WLR_TABLET_TOOL_TIP_UP;
+		break;
+	case LIBINPUT_TABLET_TOOL_TIP_DOWN:
+		wlr_event->state = WLR_TABLET_TOOL_TIP_DOWN;
+		break;
+	}
+	wl_signal_emit(&dev->tablet_tool->events.tip, wlr_event);
+}
+
+void handle_tablet_tool_button(struct libinput_event *event,
+		struct libinput_device *device) {
+	struct wlr_input_device *dev =
+		get_appropriate_device(WLR_INPUT_DEVICE_TABLET_TOOL, device);
+	if (!dev) {
+		wlr_log(L_DEBUG, "Got a tablet tool event for a device with no tablet tools?");
+		return;
+	}
+	// Tip events contain axis information. We update this information
+	// before we send the proximity event
+	handle_tablet_tool_axis(event, device);
+	struct libinput_event_tablet_tool *tevent =
+		libinput_event_get_tablet_tool_event(event);
+	struct wlr_tablet_tool_button *wlr_event =
+		calloc(1, sizeof(struct wlr_tablet_tool_button));
+	wlr_event->time_sec = libinput_event_tablet_tool_get_time(tevent);
+	wlr_event->time_usec = libinput_event_tablet_tool_get_time_usec(tevent);
+	wlr_event->button = libinput_event_tablet_tool_get_button(tevent);
+	switch (libinput_event_tablet_tool_get_button_state(tevent)) {
+	case LIBINPUT_BUTTON_STATE_RELEASED:
+		wlr_event->state = WLR_BUTTON_RELEASED;
+		break;
+	case LIBINPUT_BUTTON_STATE_PRESSED:
+		wlr_event->state = WLR_BUTTON_PRESSED;
+		break;
+	}
+	wl_signal_emit(&dev->tablet_tool->events.button, wlr_event);
+}