Add libinput based input device backend
While disable by default, passing --enable-libinput-backend to
./configure switches the input backend in weston's drm, fbdev and rpi
compositing backends to use libinput instead of udev-seat.c, evdev.c and
friends.
When enabled, weston now also depends on libinput >= 0.1.0.
Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
diff --git a/src/libinput-seat.c b/src/libinput-seat.c
new file mode 100644
index 0000000..b6adc76
--- /dev/null
+++ b/src/libinput-seat.c
@@ -0,0 +1,353 @@
+/*
+ * Copyright © 2013 Intel Corporation
+ * Copyright © 2013 Jonas Ådahl
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of the copyright holders not be used in
+ * advertising or publicity pertaining to distribution of the software
+ * without specific, written prior permission. The copyright holders make
+ * no representations about the suitability of this software for any
+ * purpose. It is provided "as is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
+ * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <libinput.h>
+#include <libudev.h>
+
+#include "compositor.h"
+#include "launcher-util.h"
+#include "libinput-seat.h"
+#include "libinput-device.h"
+
+static const char default_seat[] = "seat0";
+static const char default_seat_name[] = "default";
+
+static void
+process_events(struct udev_input *input);
+static struct udev_seat *
+udev_seat_create(struct udev_input *input, const char *seat_name);
+static void
+udev_seat_destroy(struct udev_seat *seat);
+
+static void
+device_added(struct udev_input *input, struct libinput_device *libinput_device)
+{
+ struct weston_compositor *c;
+ struct evdev_device *device;
+ struct weston_output *output;
+ const char *seat_name;
+ const char *output_name;
+ struct libinput_seat *libinput_seat;
+ struct weston_seat *seat;
+ struct udev_seat *udev_seat;
+
+ c = input->compositor;
+ libinput_seat = libinput_device_get_seat(libinput_device);
+
+ seat_name = libinput_seat_get_logical_name(libinput_seat);
+ udev_seat = udev_seat_get_named(input, seat_name);
+ if (!udev_seat)
+ return;
+
+ seat = &udev_seat->base;
+ device = evdev_device_create(libinput_device, seat);
+ if (device == NULL)
+ return;
+
+ udev_seat = (struct udev_seat *) seat;
+ wl_list_insert(udev_seat->devices_list.prev, &device->link);
+
+ if (seat->output && seat->pointer)
+ weston_pointer_clamp(seat->pointer,
+ &seat->pointer->x,
+ &seat->pointer->y);
+
+ output_name = libinput_device_get_output_name(libinput_device);
+ if (output_name) {
+ device->output_name = strdup(output_name);
+ wl_list_for_each(output, &c->output_list, link)
+ if (strcmp(output->name, device->output_name) == 0)
+ evdev_device_set_output(device, output);
+ } else if (device->output == NULL) {
+ output = container_of(c->output_list.next,
+ struct weston_output, link);
+ evdev_device_set_output(device, output);
+ }
+
+ if (!input->suspended)
+ weston_seat_repick(seat);
+}
+
+static void
+udev_seat_remove_devices(struct udev_seat *seat)
+{
+ struct evdev_device *device, *next;
+
+ wl_list_for_each_safe(device, next, &seat->devices_list, link) {
+ evdev_device_destroy(device);
+ }
+}
+
+void
+udev_input_disable(struct udev_input *input)
+{
+ if (input->suspended)
+ return;
+
+ libinput_suspend(input->libinput);
+ process_events(input);
+ input->suspended = 1;
+}
+
+static int
+udev_input_process_event(struct libinput_event *event)
+{
+ struct libinput *libinput = libinput_event_get_context(event);
+ struct libinput_device *libinput_device =
+ libinput_event_get_device(event);
+ struct udev_input *input = libinput_get_user_data(libinput);
+ struct evdev_device *device;
+ int handled = 1;
+
+ switch (libinput_event_get_type(event)) {
+ case LIBINPUT_EVENT_DEVICE_ADDED:
+ device_added(input, libinput_device);
+ break;
+ case LIBINPUT_EVENT_DEVICE_REMOVED:
+ device = libinput_device_get_user_data(libinput_device);
+ evdev_device_destroy(device);
+ break;
+ default:
+ handled = 0;
+ }
+
+ return handled;
+}
+
+static void
+process_event(struct libinput_event *event)
+{
+ if (udev_input_process_event(event))
+ return;
+ if (evdev_device_process_event(event))
+ return;
+}
+
+static void
+process_events(struct udev_input *input)
+{
+ struct libinput_event *event;
+
+ while ((event = libinput_get_event(input->libinput))) {
+ process_event(event);
+ libinput_event_destroy(event);
+ }
+}
+
+static int
+udev_input_dispatch(struct udev_input *input)
+{
+ if (libinput_dispatch(input->libinput) != 0)
+ weston_log("libinput: Failed to dispatch libinput\n");
+
+ process_events(input);
+
+ return 0;
+}
+
+static int
+libinput_source_dispatch(int fd, uint32_t mask, void *data)
+{
+ struct udev_input *input = data;
+
+ return udev_input_dispatch(input) != 0;
+}
+
+static int
+open_restricted(const char *path, int flags, void *user_data)
+{
+ struct udev_input *input = user_data;
+ struct weston_launcher *launcher = input->compositor->launcher;
+
+ return weston_launcher_open(launcher, path, flags);
+}
+
+static void
+close_restricted(int fd, void *user_data)
+{
+ struct udev_input *input = user_data;
+ struct weston_launcher *launcher = input->compositor->launcher;
+
+ weston_launcher_close(launcher, fd);
+}
+
+const struct libinput_interface libinput_interface = {
+ open_restricted,
+ close_restricted,
+};
+
+int
+udev_input_enable(struct udev_input *input)
+{
+ struct wl_event_loop *loop;
+ struct weston_compositor *c = input->compositor;
+ int fd;
+ struct udev_seat *seat;
+ int devices_found = 0;
+
+ loop = wl_display_get_event_loop(c->wl_display);
+ fd = libinput_get_fd(input->libinput);
+ input->libinput_source =
+ wl_event_loop_add_fd(loop, fd, WL_EVENT_READABLE,
+ libinput_source_dispatch, input);
+ if (!input->libinput_source) {
+ return -1;
+ }
+
+ if (input->suspended) {
+ if (libinput_resume(input->libinput) != 0) {
+ wl_event_source_remove(input->libinput_source);
+ input->libinput_source = NULL;
+ return -1;
+ }
+ input->suspended = 0;
+ process_events(input);
+ }
+
+ wl_list_for_each(seat, &input->compositor->seat_list, base.link) {
+ evdev_notify_keyboard_focus(&seat->base, &seat->devices_list);
+
+ if (!wl_list_empty(&seat->devices_list))
+ devices_found = 1;
+ }
+
+ if (devices_found == 0) {
+ weston_log(
+ "warning: no input devices on entering Weston. "
+ "Possible causes:\n"
+ "\t- no permissions to read /dev/input/event*\n"
+ "\t- seats misconfigured "
+ "(Weston backend option 'seat', "
+ "udev device property ID_SEAT)\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+int
+udev_input_init(struct udev_input *input, struct weston_compositor *c, struct udev *udev,
+ const char *seat_id)
+{
+ memset(input, 0, sizeof *input);
+
+ input->compositor = c;
+
+ input->libinput = libinput_udev_create_for_seat(&libinput_interface, input,
+ udev, seat_id);
+ if (!input->libinput) {
+ return -1;
+ }
+ process_events(input);
+
+ return udev_input_enable(input);
+}
+
+void
+udev_input_destroy(struct udev_input *input)
+{
+ struct udev_seat *seat, *next;
+
+ wl_event_source_remove(input->libinput_source);
+ wl_list_for_each_safe(seat, next, &input->compositor->seat_list, base.link)
+ udev_seat_destroy(seat);
+ libinput_destroy(input->libinput);
+}
+
+static void
+udev_seat_led_update(struct weston_seat *seat_base, enum weston_led leds)
+{
+ struct udev_seat *seat = (struct udev_seat *) seat_base;
+ struct evdev_device *device;
+
+ wl_list_for_each(device, &seat->devices_list, link)
+ evdev_led_update(device, leds);
+}
+
+static void
+notify_output_create(struct wl_listener *listener, void *data)
+{
+ struct udev_seat *seat = container_of(listener, struct udev_seat,
+ output_create_listener);
+ struct evdev_device *device;
+ struct weston_output *output = data;
+
+ wl_list_for_each(device, &seat->devices_list, link)
+ if (device->output_name &&
+ strcmp(output->name, device->output_name) == 0) {
+ evdev_device_set_output(device, output);
+ break;
+ }
+}
+
+static struct udev_seat *
+udev_seat_create(struct udev_input *input, const char *seat_name)
+{
+ struct weston_compositor *c = input->compositor;
+ struct udev_seat *seat;
+
+ seat = zalloc(sizeof *seat);
+
+ if (!seat)
+ return NULL;
+ weston_seat_init(&seat->base, c, seat_name);
+ seat->base.led_update = udev_seat_led_update;
+
+ seat->output_create_listener.notify = notify_output_create;
+ wl_signal_add(&c->output_created_signal,
+ &seat->output_create_listener);
+
+ wl_list_init(&seat->devices_list);
+
+ return seat;
+}
+
+static void
+udev_seat_destroy(struct udev_seat *seat)
+{
+ udev_seat_remove_devices(seat);
+ if (seat->base.keyboard)
+ notify_keyboard_focus_out(&seat->base);
+ weston_seat_release(&seat->base);
+ wl_list_remove(&seat->output_create_listener.link);
+ free(seat);
+}
+
+struct udev_seat *
+udev_seat_get_named(struct udev_input *input, const char *seat_name)
+{
+ struct udev_seat *seat;
+
+ wl_list_for_each(seat, &input->compositor->seat_list, base.link) {
+ if (strcmp(seat->base.seat_name, seat_name) == 0)
+ return seat;
+ }
+
+ return udev_seat_create(input, seat_name);
+}