src/evdev.h

/*
 * Copyright © 2011, 2012 Intel Corporation
 *
 * 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.
 */

#ifndef EVDEV_H
#define EVDEV_H

#include <linux/input.h>
#include <wayland-util.h>
#include <libudev.h>

struct evdev_seat {
	struct weston_seat base;
	struct wl_list devices_list;
	struct udev_monitor *udev_monitor;
	struct wl_event_source *udev_monitor_source;
	char *seat_id;
};

#define MAX_SLOTS 16

enum evdev_event_type {
	EVDEV_ABSOLUTE_MOTION = (1 << 0),
	EVDEV_ABSOLUTE_MT_DOWN = (1 << 1),
	EVDEV_ABSOLUTE_MT_MOTION = (1 << 2),
	EVDEV_ABSOLUTE_MT_UP = (1 << 3),
	EVDEV_RELATIVE_MOTION = (1 << 4),
};

enum evdev_device_capability {
	EVDEV_KEYBOARD = (1 << 0),
	EVDEV_BUTTON = (1 << 1),
	EVDEV_MOTION_ABS = (1 << 2),
	EVDEV_MOTION_REL = (1 << 3),
	EVDEV_TOUCH = (1 << 4),
};

struct evdev_input_device {
	struct evdev_seat *master;
	struct wl_list link;
	struct wl_event_source *source;
	struct weston_output *output;
	struct evdev_dispatch *dispatch;
	char *devnode;
	int fd;
	struct {
		int min_x, max_x, min_y, max_y;
		int32_t x, y;
	} abs;

	struct {
		int slot;
		int32_t x[MAX_SLOTS];
		int32_t y[MAX_SLOTS];
	} mt;
	struct mtdev *mtdev;

	struct {
		wl_fixed_t dx, dy;
	} rel;

	enum evdev_event_type pending_events;
	enum evdev_device_capability caps;

	int is_mt;
};

/* copied from udev/extras/input_id/input_id.c */
/* we must use this kernel-compatible implementation */
#define BITS_PER_LONG (sizeof(unsigned long) * 8)
#define NBITS(x) ((((x)-1)/BITS_PER_LONG)+1)
#define OFF(x)  ((x)%BITS_PER_LONG)
#define BIT(x)  (1UL<<OFF(x))
#define LONG(x) ((x)/BITS_PER_LONG)
#define TEST_BIT(array, bit)    ((array[LONG(bit)] >> OFF(bit)) & 1)
/* end copied */

struct evdev_dispatch;

struct evdev_dispatch_interface {
	/* Process an evdev input event. */
	void (*process)(struct evdev_dispatch *dispatch,
			struct evdev_input_device *device,
			struct input_event *event,
			uint32_t time);

	/* Destroy an event dispatch handler and free all its resources. */
	void (*destroy)(struct evdev_dispatch *dispatch);
};

struct evdev_dispatch {
	struct evdev_dispatch_interface *interface;
};

struct evdev_dispatch *
evdev_touchpad_create(struct evdev_input_device *device);

void
evdev_add_devices(struct udev *udev, struct weston_seat *seat_base);

void
evdev_remove_devices(struct weston_seat *seat_base);

void
evdev_input_create(struct weston_compositor *c, struct udev *udev,
		   const char *seat);

void
evdev_input_destroy(struct weston_seat *seat);

int
evdev_enable_udev_monitor(struct udev *udev, struct weston_seat *seat_base);

void
evdev_disable_udev_monitor(struct weston_seat *seat_base);

#endif /* EVDEV_H */