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/*
* Copyright © 2008 Kristian Høgsberg
*
* 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 <stdio.h>
#include <stdlib.h>
#include <linux/input.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/input.h>
#include "wayland.h"
struct wl_input_device {
struct wl_object base;
struct wl_event_source *source;
struct wl_display *display;
int fd;
int tool, new_x, new_y;
int32_t x, y, base_x, base_y;
};
static const struct wl_method input_device_methods[] = {
};
static const struct wl_event input_device_events[] = {
{ "motion", "iiii" },
{ "button", "uu" },
{ "key", "uu" },
};
static const struct wl_interface input_device_interface = {
"input_device", 1,
ARRAY_LENGTH(input_device_methods),
input_device_methods,
ARRAY_LENGTH(input_device_events),
input_device_events,
};
static void wl_input_device_data(int fd, uint32_t mask, void *data)
{
struct wl_input_device *device = data;
struct input_event ev[8], *e, *end;
int len, value, dx, dy, absolute_event;
dx = 0;
dy = 0;
absolute_event = 0;
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 = device->x - value;
device->new_x = 0;
}
device->x = device->base_x + value;
break;
case ABS_Y:
if (device->new_y) {
device->base_y = device->y - value;
device->new_y = 0;
}
device->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:
wl_display_post_button_event(device->display,
&device->base, 0, value);
break;
case BTN_RIGHT:
wl_display_post_button_event(device->display,
&device->base, 2, value);
break;
case BTN_MIDDLE:
wl_display_post_button_event(device->display,
&device->base, 1, value);
break;
default:
wl_display_post_key_event(device->display,
&device->base, e->code, value);
break;
}
}
}
if (dx != 0 || dy != 0)
wl_display_post_relative_event(device->display,
&device->base, dx, dy);
if (absolute_event && device->tool)
wl_display_post_absolute_event(device->display,
&device->base,
device->x, device->y);
}
WL_EXPORT struct wl_object *
wl_input_device_create(struct wl_display *display, const char *path)
{
struct wl_input_device *device;
struct wl_event_loop *loop;
device = malloc(sizeof *device);
if (device == NULL)
return NULL;
device->base.interface = &input_device_interface;
device->display = display;
device->tool = 1;
device->x = 100;
device->y = 100;
device->new_x = 1;
device->new_y = 1;
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,
wl_input_device_data, device);
if (device->source == NULL) {
close(device->fd);
free(device);
return NULL;
}
return &device->base;
}
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