Merge pull request #11 from SirCmpwn/libinput

[WIP] libinput backend

1 files changed, 121 insertions, 0 deletions

diff --git a/backend/libinput/backend.c b/backend/libinput/backend.c
new file mode 100644
index 00000000..82ba44a6
--- /dev/null
+++ b/backend/libinput/backend.c
@@ -0,0 +1,121 @@
+#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.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_readable(int fd, uint32_t mask, void *_state) {
+	struct wlr_backend_state *state = _state;
+	if (libinput_dispatch(state->libinput) != 0) {
+		wlr_log(L_ERROR, "Failed to dispatch libinput");
+		// TODO: some kind of abort?
+		return 0;
+	}
+	struct libinput_event *event;
+	while ((event = libinput_get_event(state->libinput))) {
+		wlr_libinput_event(state, event);
+	}
+	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) {
+	wlr_log(L_DEBUG, "Initializing libinput");
+	state->libinput = libinput_udev_create_context(&libinput_impl, state,
+			state->udev->udev);
+	if (!state->libinput) {
+		wlr_log(L_ERROR, "Failed to create libinput context");
+		return false;
+	}
+
+	// TODO: Let user customize seat used
+	if (libinput_udev_assign_seat(state->libinput, "seat0") != 0) {
+		wlr_log(L_ERROR, "Failed to assign libinput seat");
+		return false;
+	}
+
+	// TODO: More sophisticated logging
+	libinput_log_set_handler(state->libinput, wlr_libinput_log);
+	libinput_log_set_priority(state->libinput, 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->libinput), WL_EVENT_READABLE,
+			wlr_libinput_readable, state);
+	if (!state->input_event) {
+		wlr_log(L_ERROR, "Failed to create input event on event loop");
+		return false;
+	}
+	wlr_log(L_DEBUG, "libinput sucessfully initialized");
+	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));
+		goto error_state;
+	}
+
+	if (!(state->devices = list_create())) {
+		wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
+		goto error_backend;
+	}
+
+	state->backend = backend;
+	state->session = session;
+	state->udev = udev;
+	state->display = display;
+
+	return backend;
+error_state:
+	free(state);
+error_backend:
+	wlr_backend_destroy(backend);
+	return NULL;
+}