path: root/src/evdev_btn.c

/*
 * Copyright © 2006 Zephaniah E. Hull
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Soft-
 * ware"), to deal in the Software without restriction, including without
 * limitation the rights to use, copy, modify, merge, publish, distribute,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, provided that the above copyright
 * notice(s) and this permission notice appear in all copies of the Soft-
 * ware and that both the above copyright notice(s) and this permission
 * notice appear in supporting documentation.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
 * ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY
 * RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN
 * THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE-
 * QUENTIAL 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 PERFOR-
 * MANCE OF THIS SOFTWARE.
 *
 * Except as contained in this notice, the name of a copyright holder shall
 * not be used in advertising or otherwise to promote the sale, use or
 * other dealings in this Software without prior written authorization of
 * the copyright holder.
 *
 * Author:  Zephaniah E. Hull (warp@aehallh.com)
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <X11/keysym.h>
#include <X11/XF86keysym.h>
#include <X11/extensions/XIproto.h>

/* The libc wrapper just blows... linux/input.h must be included
 * before xf86_ansic.h and xf86_libc.h so we avoid defining ioctl
 * twice. */

#include <linux/input.h>

#include <misc.h>
#include <xf86.h>
#include <xf86str.h>
#include <xf86_OSproc.h>
#include <xf86_ansic.h>
#include <xf86_libc.h>
#include <xf86Xinput.h>
#include <exevents.h>
#include <mipointer.h>

#include <xf86Module.h>

#include "evdev.h"

#define ArrayLength(a) (sizeof(a) / (sizeof((a)[0])))

#define BITS_PER_LONG (sizeof(long) * 8)
#define NBITS(x) ((((x)-1)/BITS_PER_LONG)+1)
#define OFF(x)  ((x)%BITS_PER_LONG)
#define LONG(x) ((x)/BITS_PER_LONG)
#define TestBit(bit, array)    ((array[LONG(bit)] >> OFF(bit)) & 1)

void
EvdevBtnPostFakeClicks(InputInfoPtr pInfo, int button, int count)
{
    int i;

    for (i = 0; i < count; i++) {
        xf86PostButtonEvent(pInfo->dev, 0, button, 1, 0, 0);
        xf86PostButtonEvent(pInfo->dev, 0, button, 0, 0, 0);
    }
}

int
EvdevBtnInit (DeviceIntPtr device)
{
    InputInfoPtr pInfo = device->public.devicePrivate;
    evdevDevicePtr pEvdev = pInfo->private;
    CARD8 *map;
    int i;

    if (!pEvdev->state.btn)
	return Success;

    map = Xcalloc (sizeof (CARD8) * (pEvdev->state.btn->buttons + 1));

    for (i = 0; i <= pEvdev->state.btn->buttons; i++)
        map[i] = i;

    xf86Msg(X_ERROR, "%s (%d): Registering %d buttons.\n", __FILE__, __LINE__,
	    pEvdev->state.btn->buttons);
    if (!InitButtonClassDeviceStruct (device, pEvdev->state.btn->buttons, map)) {
	pEvdev->state.btn->buttons = 0;

        return !Success;
    }

    Xfree (map);

    return Success;
}

int
EvdevBtnOn (DeviceIntPtr device)
{
    InputInfoPtr pInfo = device->public.devicePrivate;
    evdevDevicePtr pEvdev = pInfo->private;
    int i, blocked;

    if (!pEvdev->state.btn)
	return Success;

    blocked = xf86BlockSIGIO ();
    for (i = 1; i <= pEvdev->state.btn->buttons; i++)
	xf86PostButtonEvent (device, 0, i, 0, 0, 0);
    xf86UnblockSIGIO (blocked);

    return Success;
}

int
EvdevBtnOff (DeviceIntPtr device)
{
    return Success;
}

/*
 * Warning, evil lives here.
 */
static void
EvdevBtnCalcRemap (InputInfoPtr pInfo)
{
    evdevDevicePtr pEvdev = pInfo->private;
    evdevStatePtr state = &pEvdev->state;
    int i, j, base, clear, fake;

    for (i = 0, base = 1, fake = 0; i < pEvdev->state.btn->real_buttons; i++) {
	if (state->rel) {
	    do {
		clear = 1;
		for (j = 0; j < REL_MAX; j++) {
		    if (state->rel->btnMap[j][0] == (i + base)) {
			base++;
			clear = 0;
			break;
		    }
		    if (state->rel->btnMap[j][1] == (i + base)) {
			base++;
			clear = 0;
			break;
		    }
		}
	    } while (!clear);
	}

	if (!fake && base != 1)
	    fake = i;

	state->btn->buttons = state->btn->map[i] = i + base;
    }

    if (state->btn->real_buttons >= 3 && (!fake || fake >= 3)) {
	base = state->btn->map[1];
	state->btn->map[1] = state->btn->map[2];
	state->btn->map[2] = base;
    }

    if (state->rel) {
	for (i = 0; i < REL_MAX; i++) {
	    if (state->rel->btnMap[i][0] > state->btn->buttons)
		state->btn->buttons = state->rel->btnMap[i][0];
	    if (state->rel->btnMap[i][1] > state->btn->buttons)
		state->btn->buttons = state->rel->btnMap[i][1];
	}
    }
}


int
EvdevBtnNew(InputInfoPtr pInfo)
{
    evdevDevicePtr pEvdev = pInfo->private;
    evdevStatePtr state = &pEvdev->state;
    int i, bit;

    state->btn = Xcalloc (sizeof (evdevBtnRec));

    for (i = BTN_MISC; i < (KEY_OK - 1); i++)
	if (TestBit (i, pEvdev->bits.key)) {
	    bit = i;
	    if ((bit >= BTN_MOUSE) && (bit < BTN_JOYSTICK)) {
		bit -= BTN_MOUSE - BTN_MISC;
	    } else if ((bit >= BTN_MISC) && (bit < BTN_MOUSE)) {
		bit += BTN_MOUSE - BTN_MISC;
	    }
	    bit -= BTN_MISC;
	    state->btn->real_buttons = bit + 1;
	}

    if (state->btn->real_buttons)
        xf86Msg(X_INFO, "%s: Found %d mouse buttons\n", pInfo->name, state->btn->real_buttons);

    EvdevBtnCalcRemap (pInfo);

    if (state->btn->buttons)
	xf86Msg(X_INFO, "%s: Configured %d mouse buttons\n", pInfo->name, state->btn->buttons);
    else {
	Xfree (state->btn);
	state->btn = NULL;
	return !Success;
    }

    pInfo->flags |= XI86_SEND_DRAG_EVENTS | XI86_CONFIGURED;
    /*
     * FIXME: Mouse may not be accurate.
     * Check buttons to see if we're actually a joystick or something.
     */
    pInfo->type_name = XI_MOUSE;

    return Success;
}

void
EvdevBtnProcess (InputInfoPtr pInfo, struct input_event *ev)
{
    evdevDevicePtr pEvdev = pInfo->private;
    evdevStatePtr state = &pEvdev->state;
    int button;

    if (!state->btn)
	return;

    button = ev->code - BTN_MISC;

    if ((ev->code >= BTN_MOUSE) && (ev->code < BTN_JOYSTICK)) {
	button -= BTN_MOUSE - BTN_MISC;
    } else if ((ev->code >= BTN_MISC) && (ev->code < BTN_MOUSE)) {
	button += BTN_MOUSE - BTN_MISC;
    }

    if (state->btn->state[button])
	*state->btn->state[button] = ev->value;

    button = state->btn->map[button];
    xf86PostButtonEvent (pInfo->dev, 0, button, ev->value, 0, 0);
}