Merge pull request #11 from SirCmpwn/libinput

[WIP] libinput backend

1 files changed, 188 insertions, 0 deletions

diff --git a/backend/libinput/events.c b/backend/libinput/events.c
new file mode 100644
index 00000000..2e7cc541
--- /dev/null
+++ b/backend/libinput/events.c
@@ -0,0 +1,188 @@
+#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_input_device *get_appropriate_device(
+		enum wlr_input_device_type desired_type,
+		struct libinput_device *device) {
+	list_t *devices = libinput_device_get_user_data(device);
+	if (!devices) {
+		return NULL;
+	}
+	for (size_t i = 0; i < devices->length; ++i) {
+		struct wlr_input_device *dev = devices->items[i];
+		if (dev->type == desired_type) {
+			return dev;
+		}
+	}
+	return NULL;
+}
+
+static void wlr_libinput_device_destroy(struct wlr_input_device_state *state) {
+	libinput_device_unref(state->handle);
+	free(state);
+}
+
+static struct wlr_input_device_impl input_device_impl = {
+	.destroy = wlr_libinput_device_destroy
+};
+
+static struct wlr_input_device *allocate_device(
+		struct wlr_backend_state *state, struct libinput_device *device,
+		list_t *devices, enum wlr_input_device_type type) {
+	int vendor = libinput_device_get_id_vendor(device);
+	int product = libinput_device_get_id_product(device);
+	const char *name = libinput_device_get_name(device);
+	struct wlr_input_device_state *devstate =
+		calloc(1, sizeof(struct wlr_input_device_state));
+	devstate->handle = device;
+	libinput_device_ref(device);
+	struct wlr_input_device *wlr_device = wlr_input_device_create(
+		type, &input_device_impl, devstate,
+		name, vendor, product);
+	list_add(devices, wlr_device);
+	list_add(state->devices, wlr_device);
+	return wlr_device;
+}
+
+static void handle_device_added(struct wlr_backend_state *state,
+		struct libinput_device *device) {
+	assert(state && device);
+	/*
+	 * Note: the wlr API exposes only devices with a single capability, because
+	 * that meshes better with how Wayland does things and is a bit simpler.
+	 * However, libinput devices often have multiple capabilities - in such
+	 * cases we have to create several devices.
+	 */
+	int vendor = libinput_device_get_id_vendor(device);
+	int product = libinput_device_get_id_product(device);
+	const char *name = libinput_device_get_name(device);
+	list_t *devices = list_create();
+	wlr_log(L_DEBUG, "Added %s [%d:%d]", name, vendor, product);
+
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_KEYBOARD)) {
+		struct wlr_input_device *wlr_device = allocate_device(state,
+				device, devices, WLR_INPUT_DEVICE_KEYBOARD);
+		wlr_device->keyboard = wlr_libinput_keyboard_create(device);
+		wl_signal_emit(&state->backend->events.input_add, wlr_device);
+	}
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_POINTER)) {
+		struct wlr_input_device *wlr_device = allocate_device(state,
+				device, devices, WLR_INPUT_DEVICE_POINTER);
+		wlr_device->pointer = wlr_libinput_pointer_create(device);
+		wl_signal_emit(&state->backend->events.input_add, wlr_device);
+	}
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_TOUCH)) {
+		struct wlr_input_device *wlr_device = allocate_device(state,
+				device, devices, WLR_INPUT_DEVICE_TOUCH);
+		wlr_device->touch = wlr_libinput_touch_create(device);
+		wl_signal_emit(&state->backend->events.input_add, wlr_device);
+	}
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_TABLET_TOOL)) {
+		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)) {
+		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
+	}
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_SWITCH)) {
+		// TODO
+	}
+
+	if (devices->length > 0) {
+		libinput_device_set_user_data(device, devices);
+	} else {
+		list_free(devices);
+	}
+}
+
+static void handle_device_removed(struct wlr_backend_state *state,
+		struct libinput_device *device) {
+	wlr_log(L_DEBUG, "libinput device removed");
+	// TODO
+}
+
+void wlr_libinput_event(struct wlr_backend_state *state,
+		struct libinput_event *event) {
+	assert(state && event);
+	struct libinput *context = libinput_event_get_context(event);
+	struct libinput_device *device = libinput_event_get_device(event);
+	enum libinput_event_type event_type = libinput_event_get_type(event);
+	(void)context;
+	switch (event_type) {
+	case LIBINPUT_EVENT_DEVICE_ADDED:
+		handle_device_added(state, device);
+		break;
+	case LIBINPUT_EVENT_DEVICE_REMOVED:
+		handle_device_removed(state, device);
+		break;
+	case LIBINPUT_EVENT_KEYBOARD_KEY:
+		handle_keyboard_key(event, device);
+		break;
+	case LIBINPUT_EVENT_POINTER_MOTION:
+		handle_pointer_motion(event, device);
+		break;
+	case LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE:
+		handle_pointer_motion_abs(event, device);
+		break;
+	case LIBINPUT_EVENT_POINTER_BUTTON:
+		handle_pointer_button(event, device);
+		break;
+	case LIBINPUT_EVENT_POINTER_AXIS:
+		handle_pointer_axis(event, device);
+		break;
+	case LIBINPUT_EVENT_TOUCH_DOWN:
+		handle_touch_down(event, device);
+		break;
+	case LIBINPUT_EVENT_TOUCH_UP:
+		handle_touch_up(event, device);
+		break;
+	case LIBINPUT_EVENT_TOUCH_MOTION:
+		handle_touch_motion(event, device);
+		break;
+	case LIBINPUT_EVENT_TOUCH_CANCEL:
+		handle_touch_cancel(event, device);
+		break;
+	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;
+	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;
+	}
+}