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/*
* Copyright © 2008 Kristian Høgsberg
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <linux/input.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/input.h>
#include "wayland.h"
#include "wayland-system-compositor.h"
struct evdev_input_device {
struct wlsc_input_device *device;
struct wl_event_source *source;
int tool, new_x, new_y;
int base_x, base_y;
int fd;
};
static void evdev_input_device_data(int fd, uint32_t mask, void *data)
{
struct evdev_input_device *device = data;
struct input_event ev[8], *e, *end;
int len, value, dx, dy, absolute_event;
int x, y;
dx = 0;
dy = 0;
absolute_event = 0;
wlsc_device_get_position(device->device, &x, &y);
len = read(fd, &ev, sizeof ev);
if (len < 0 || len % sizeof e[0] != 0) {
/* FIXME: handle error... reopen device? */;
return;
}
e = ev;
end = (void *) ev + len;
for (e = ev; e < end; e++) {
/* Get the signed value, earlier kernels had this as unsigned */
value = e->value;
switch (e->type) {
case EV_REL:
switch (e->code) {
case REL_X:
dx += value;
break;
case REL_Y:
dy += value;
break;
}
break;
case EV_ABS:
absolute_event = 1;
switch (e->code) {
case ABS_X:
if (device->new_x) {
device->base_x = x - value;
device->new_x = 0;
}
x = device->base_x + value;
break;
case ABS_Y:
if (device->new_y) {
device->base_y = y - value;
device->new_y = 0;
}
y = device->base_y + value;
break;
}
break;
case EV_KEY:
if (value == 2)
break;
switch (e->code) {
case BTN_TOUCH:
case BTN_TOOL_PEN:
case BTN_TOOL_RUBBER:
case BTN_TOOL_BRUSH:
case BTN_TOOL_PENCIL:
case BTN_TOOL_AIRBRUSH:
case BTN_TOOL_FINGER:
case BTN_TOOL_MOUSE:
case BTN_TOOL_LENS:
if (device->tool == 0 && value) {
device->new_x = 1;
device->new_y = 1;
}
device->tool = value ? e->code : 0;
break;
case BTN_LEFT:
case BTN_RIGHT:
case BTN_MIDDLE:
case BTN_SIDE:
case BTN_EXTRA:
case BTN_FORWARD:
case BTN_BACK:
case BTN_TASK:
notify_button(device->device, e->code, value);
break;
default:
notify_key(device->device, e->code, value);
break;
}
}
}
if (dx != 0 || dy != 0)
notify_motion(device->device, x + dx, y + dy);
if (absolute_event && device->tool)
notify_motion(device->device, x, y);
}
struct evdev_input_device *
evdev_input_device_create(struct wlsc_input_device *master,
struct wl_display *display, const char *path)
{
struct evdev_input_device *device;
struct wl_event_loop *loop;
device = malloc(sizeof *device);
if (device == NULL)
return NULL;
device->tool = 1;
device->new_x = 1;
device->new_y = 1;
device->device = master;
device->fd = open(path, O_RDONLY);
if (device->fd < 0) {
free(device);
fprintf(stderr, "couldn't create pointer for %s: %m\n", path);
return NULL;
}
loop = wl_display_get_event_loop(display);
device->source = wl_event_loop_add_fd(loop, device->fd,
WL_EVENT_READABLE,
evdev_input_device_data, device);
if (device->source == NULL) {
close(device->fd);
free(device);
return NULL;
}
return device;
}
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