Initial pass on libinput backend

1 files changed, 97 insertions, 0 deletions

diff --git a/backend/libinput/backend.c b/backend/libinput/backend.c
new file mode 100644
index 00000000..6142bde3
--- /dev/null
+++ b/backend/libinput/backend.c
@@ -0,0 +1,97 @@
+#include <stdlib.h>
+#include <assert.h>
+#include <libinput.h>
+#include <wlr/session.h>
+#include <wlr/backend/interface.h>
+#include "backend/udev.h"
+#include "backend/libinput/backend.h"
+#include "common/log.h"
+
+static int wlr_libinput_open_restricted(const char *path,
+		int flags, void *_state) {
+	struct wlr_backend_state *state = _state;
+	return wlr_session_open_file(state->session, path);
+}
+
+static void wlr_libinput_close_restricted(int fd, void *_state) {
+	struct wlr_backend_state *state = _state;
+	wlr_session_close_file(state->session, fd);
+}
+
+static const struct libinput_interface libinput_impl = {
+	.open_restricted = wlr_libinput_open_restricted,
+	.close_restricted = wlr_libinput_close_restricted
+};
+
+static int wlr_libinput_handle_event(int fd, uint32_t mask, void *_state) {
+	// TODO
+	return 0;
+}
+
+static void wlr_libinput_log(struct libinput *libinput,
+		enum libinput_log_priority priority, const char *fmt, va_list args) {
+	_wlr_vlog(L_ERROR, fmt, args);
+}
+
+static bool wlr_libinput_backend_init(struct wlr_backend_state *state) {
+	state->handle = libinput_udev_create_context(&libinput_impl, state,
+			state->udev->udev);
+	if (!state->handle) {
+		return false;
+	}
+
+	// TODO: Let user customize seat used
+	if (!libinput_udev_assign_seat(state->handle, "seat0")) {
+		return false;
+	}
+
+	// TODO: More sophisticated logging
+	libinput_log_set_handler(state->handle, wlr_libinput_log);
+	libinput_log_set_priority(state->handle, LIBINPUT_LOG_PRIORITY_ERROR);
+
+	struct wl_event_loop *event_loop =
+		wl_display_get_event_loop(state->display);
+	if (state->input_event) {
+		wl_event_source_remove(state->input_event);
+	}
+	state->input_event = wl_event_loop_add_fd(event_loop,
+			libinput_get_fd(state->handle), WL_EVENT_READABLE,
+			wlr_libinput_handle_event, state);
+	if (!state->input_event) {
+		return false;
+	}
+	return true;
+}
+
+static void wlr_libinput_backend_destroy(struct wlr_backend_state *state) {
+	// TODO
+}
+
+static struct wlr_backend_impl backend_impl = {
+	.init = wlr_libinput_backend_init,
+	.destroy = wlr_libinput_backend_destroy
+};
+
+struct wlr_backend *wlr_libinput_backend_create(struct wl_display *display,
+		struct wlr_session *session, struct wlr_udev *udev) {
+	assert(display && session && udev);
+
+	struct wlr_backend_state *state = calloc(1, sizeof(struct wlr_backend_state));
+	if (!state) {
+		wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
+		return NULL;
+	}
+
+	struct wlr_backend *backend = wlr_backend_create(&backend_impl, state);
+	if (!backend) {
+		wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
+		return NULL;
+	}
+
+	state->backend = backend;
+	state->session = session;
+	state->udev = udev;
+	state->display = display;
+
+	return backend;
+}