xf86-input-evdev/src/evdev.h

/*
 * Copyright © 2004-2008 Red Hat, Inc.
 * Copyright © 2008 University of South Australia
 *
 * 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 Red Hat
 * not be used in advertising or publicity pertaining to distribution
 * of the software without specific, written prior permission.  Red
 * Hat makes no representations about the suitability of this software
 * for any purpose.  It is provided "as is" without express or implied
 * warranty.
 *
 * THE AUTHORS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
 * NO EVENT SHALL THE AUTHORS 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.
 *
 * Authors:
 *	Kristian Høgsberg (krh@redhat.com)
 *	Adam Jackson (ajax@redhat.com)
 *	Peter Hutterer (peter@cs.unisa.edu.au)
 */

#ifndef EVDEV_H
#define EVDEV_H

#include <linux/input.h>
#include <linux/types.h>

#include <xf86Xinput.h>
#include <xf86_OSproc.h>

#ifdef XKB
#include <xkbstr.h>
#endif

#ifndef EV_CNT /* linux 2.4 kernels and earlier lack _CNT defines */
#define EV_CNT (EV_MAX+1)
#endif
#ifndef KEY_CNT
#define KEY_CNT (KEY_MAX+1)
#endif
#ifndef REL_CNT
#define REL_CNT (REL_MAX+1)
#endif
#ifndef ABS_CNT
#define ABS_CNT (ABS_MAX+1)
#endif
#ifndef LED_CNT
#define LED_CNT (LED_MAX+1)
#endif

#define EVDEV_MAXBUTTONS 32

#if GET_ABI_MAJOR(ABI_XINPUT_VERSION) >= 3
#define HAVE_PROPERTIES 1
#endif

#if GET_ABI_MAJOR(ABI_XINPUT_VERSION) < 5
typedef struct {
    char *rules;
    char *model;
    char *layout;
    char *variant;
    char *options;
} XkbRMLVOSet;
#endif


#define LONG_BITS (sizeof(long) * 8)

/* Number of longs needed to hold the given number of bits */
#define NLONGS(x) (((x) + LONG_BITS - 1) / LONG_BITS)

/* axis specific data for wheel emulation */
typedef struct {
    int up_button;
    int down_button;
    int traveled_distance;
} WheelAxis, *WheelAxisPtr;

typedef struct {
    const char *device;
    int grabDevice;         /* grab the event device? */
    int screen;
    int min_x, min_y, max_x, max_y, min_p, max_p;
    int abs_x, abs_y, abs_p, old_x, old_y;
    int flags;
    int tool;
    int buttons;            /* number of buttons */
    BOOL swap_axes;
    BOOL invert_x;
    BOOL invert_y;
    BOOL has_pressure;

    /* XKB stuff has to be per-device rather than per-driver */
#if GET_ABI_MAJOR(ABI_XINPUT_VERSION) < 5
    XkbComponentNamesRec    xkbnames;
#endif
    XkbRMLVOSet rmlvo;

    /* Middle mouse button emulation */
    struct {
        BOOL                enabled;
        BOOL                pending;     /* timer waiting? */
        int                 buttonstate; /* phys. button state */
        int                 state;       /* state machine (see bt3emu.c) */
        Time                expires;     /* time of expiry */
        Time                timeout;
    } emulateMB;
    struct {
	int                 meta;           /* meta key to lock any button */
	BOOL                meta_state;     /* meta_button state */
	unsigned int        lock_pair[EVDEV_MAXBUTTONS];  /* specify a meta/lock pair */
	BOOL                lock_state[EVDEV_MAXBUTTONS]; /* state of any locked buttons */
    } dragLock;
    struct {
        BOOL                enabled;
        int                 button;
        int                 button_state;
        int                 inertia;
        WheelAxis           X;
        WheelAxis           Y;
        Time                expires;     /* time of expiry */
        Time                timeout;
    } emulateWheel;
    /* run-time calibration */
    struct {
        int                 min_x;
        int                 max_x;
        int                 min_y;
        int                 max_y;
    } calibration;

    unsigned char btnmap[32];           /* config-file specified button mapping */

    int reopen_attempts; /* max attempts to re-open after read failure */
    int reopen_left;     /* number of attempts left to re-open the device */
    OsTimerPtr reopen_timer;

    /* Cached info from device. */
    char name[1024];
    long bitmask[NLONGS(EV_CNT)];
    long key_bitmask[NLONGS(KEY_CNT)];
    long rel_bitmask[NLONGS(REL_CNT)];
    long abs_bitmask[NLONGS(ABS_CNT)];
    long led_bitmask[NLONGS(LED_CNT)];
    struct input_absinfo absinfo[ABS_CNT];

    /* minor/major number */
    dev_t min_maj;
} EvdevRec, *EvdevPtr;

unsigned int EvdevUtilButtonEventToButtonNumber(EvdevPtr pEvdev, int code);

/* Middle Button emulation */
int  EvdevMBEmuTimer(InputInfoPtr);
BOOL EvdevMBEmuFilterEvent(InputInfoPtr, int, BOOL);
void EvdevMBEmuWakeupHandler(pointer, int, pointer);
void EvdevMBEmuBlockHandler(pointer, struct timeval**, pointer);
void EvdevMBEmuPreInit(InputInfoPtr);
void EvdevMBEmuOn(InputInfoPtr);
void EvdevMBEmuFinalize(InputInfoPtr);
void EvdevMBEmuEnable(InputInfoPtr, BOOL);

/* Mouse Wheel emulation */
void EvdevWheelEmuPreInit(InputInfoPtr pInfo);
BOOL EvdevWheelEmuFilterButton(InputInfoPtr pInfo, unsigned int button, int value);
BOOL EvdevWheelEmuFilterMotion(InputInfoPtr pInfo, struct input_event *pEv);

/* Draglock code */
void EvdevDragLockPreInit(InputInfoPtr pInfo);
BOOL EvdevDragLockFilterEvent(InputInfoPtr pInfo, unsigned int button, int value);

#ifdef HAVE_PROPERTIES
void EvdevMBEmuInitProperty(DeviceIntPtr);
void EvdevWheelEmuInitProperty(DeviceIntPtr);
void EvdevDragLockInitProperty(DeviceIntPtr);
#endif
#endif