path: root/Xi/stubs.c

/* $Xorg: stubs.c,v 1.4 2001/02/09 02:04:35 xorgcvs Exp $ */

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Copyright 1989 by Hewlett-Packard Company, Palo Alto, California.

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/* $XFree86: xc/programs/Xserver/Xi/stubs.c,v 3.5 2003/11/17 22:20:30 dawes Exp $ */

/*
 * stubs.c -- stub routines for the X server side of the XINPUT
 * extension.  This file is mainly to be used only as documentation.
 * There is not much code here, and you can't get a working XINPUT
 * server just using this.
 * The Xvfb server uses this file so it will compile with the same
 * object files as the real X server for a platform that has XINPUT.
 * Xnest could do the same thing.
 */

#define	 NEED_EVENTS
#include "X.h"
#include "Xproto.h"
#include "inputstr.h"
#include "XI.h"
#include "XIproto.h"
#include "XIstubs.h"

/***********************************************************************
 *
 * Caller:	ProcXChangeKeyboardDevice
 *
 * This procedure does the implementation-dependent portion of the work
 * needed to change the keyboard device.
 *
 * The X keyboard device has a FocusRec.  If the device that has been 
 * made into the new X keyboard did not have a FocusRec, 
 * ProcXChangeKeyboardDevice will allocate one for it.
 *
 * If you do not want clients to be able to focus the old X keyboard
 * device, call DeleteFocusClassDeviceStruct to free the FocusRec.
 *
 * If you support input devices with keys that you do not want to be 
 * used as the X keyboard, you need to check for them here and return 
 * a BadDevice error.
 *
 * The default implementation is to do nothing (assume you do want
 * clients to be able to focus the old X keyboard).  The commented-out
 * sample code shows what you might do if you don't want the default.
 *
 */

int
ChangeKeyboardDevice (old_dev, new_dev)
    DeviceIntPtr	old_dev;
    DeviceIntPtr	new_dev;
    {
    /***********************************************************************
     DeleteFocusClassDeviceStruct(old_dev);	 * defined in xchgptr.c *
    **********************************************************************/
    return BadMatch;
    }


/***********************************************************************
 *
 * Caller:	ProcXChangePointerDevice
 *
 * This procedure does the implementation-dependent portion of the work
 * needed to change the pointer device.
 *
 * The X pointer device does not have a FocusRec.  If the device that
 * has been made into the new X pointer had a FocusRec, 
 * ProcXChangePointerDevice will free it.
 *
 * If you want clients to be able to focus the old pointer device that
 * has now become accessible through the input extension, you need to 
 * add a FocusRec to it here.
 *
 * The XChangePointerDevice protocol request also allows the client
 * to choose which axes of the new pointer device are used to move 
 * the X cursor in the X- and Y- directions.  If the axes are different
 * than the default ones, you need to keep track of that here.
 *
 * If you support input devices with valuators that you do not want to be 
 * used as the X pointer, you need to check for them here and return a 
 * BadDevice error.
 *
 * The default implementation is to do nothing (assume you don't want
 * clients to be able to focus the old X pointer).  The commented-out
 * sample code shows what you might do if you don't want the default.
 *
 */

int
ChangePointerDevice (
    DeviceIntPtr	old_dev,
    DeviceIntPtr	new_dev,
    unsigned char	x,
    unsigned char	y)
    {
    /***********************************************************************
    InitFocusClassDeviceStruct(old_dev);	* allow focusing old ptr*

    x_axis = x;					* keep track of new x-axis*
    y_axis = y;					* keep track of new y-axis*
    if (x_axis != 0 || y_axis != 1)
	axes_changed = TRUE;			* remember axes have changed*
    else
	axes_changed = FALSE;
    *************************************************************************/
    return BadMatch;
    }

/***********************************************************************
 *
 * Caller:	ProcXCloseDevice
 *
 * Take care of implementation-dependent details of closing a device.
 * Some implementations may actually close the device, others may just
 * remove this clients interest in that device.
 *
 * The default implementation is to do nothing (assume all input devices
 * are initialized during X server initialization and kept open).
 *
 */

void
CloseInputDevice (d, client)
    DeviceIntPtr d;
    ClientPtr client;
    {
    }

/***********************************************************************
 *
 * Caller:	ProcXListInputDevices
 *
 * This is the implementation-dependent routine to initialize an input 
 * device to the point that information about it can be listed.
 * Some implementations open all input devices when the server is first
 * initialized, and never close them.  Other implementations open only
 * the X pointer and keyboard devices during server initialization,
 * and only open other input devices when some client makes an
 * XOpenDevice request.  If some other process has the device open, the
 * server may not be able to get information about the device to list it.
 *
 * This procedure should be used by implementations that do not initialize
 * all input devices at server startup.  It should do device-dependent
 * initialization for any devices not previously initialized, and call
 * AddInputDevice for each of those devices so that a DeviceIntRec will be 
 * created for them.
 *
 * The default implementation is to do nothing (assume all input devices
 * are initialized during X server initialization and kept open).
 * The commented-out sample code shows what you might do if you don't want 
 * the default.
 *
 */

void
AddOtherInputDevices ()
    {
    /**********************************************************************
     for each uninitialized device, do something like: 

    DeviceIntPtr dev;
    DeviceProc deviceProc;
    pointer private;

    dev = (DeviceIntPtr) AddInputDevice(deviceProc, TRUE);
    dev->public.devicePrivate = private;
    RegisterOtherDevice(dev);
    dev->inited = ((*dev->deviceProc)(dev, DEVICE_INIT) == Success);
    ************************************************************************/

    }

/***********************************************************************
 *
 * Caller:	ProcXOpenDevice
 *
 * This is the implementation-dependent routine to open an input device.
 * Some implementations open all input devices when the server is first
 * initialized, and never close them.  Other implementations open only
 * the X pointer and keyboard devices during server initialization,
 * and only open other input devices when some client makes an
 * XOpenDevice request.  This entry point is for the latter type of 
 * implementation.
 *
 * If the physical device is not already open, do it here.  In this case,
 * you need to keep track of the fact that one or more clients has the
 * device open, and physically close it when the last client that has
 * it open does an XCloseDevice.
 *
 * The default implementation is to do nothing (assume all input devices
 * are opened during X server initialization and kept open).
 *
 */

void
OpenInputDevice (dev, client, status)
    DeviceIntPtr dev;
    ClientPtr client;
    int *status;
    {
    }

/****************************************************************************
 *
 * Caller:	ProcXSetDeviceMode
 *
 * Change the mode of an extension device.
 * This function is used to change the mode of a device from reporting
 * relative motion to reporting absolute positional information, and
 * vice versa.
 * The default implementation below is that no such devices are supported.
 *
 */

int
SetDeviceMode (client, dev, mode)
    register	ClientPtr	client;
    DeviceIntPtr dev;
    int		mode;
    {
    return BadMatch;
    }

/****************************************************************************
 *
 * Caller:	ProcXSetDeviceValuators
 *
 * Set the value of valuators on an extension input device.
 * This function is used to set the initial value of valuators on
 * those input devices that are capable of reporting either relative
 * motion or an absolute position, and allow an initial position to be set.
 * The default implementation below is that no such devices are supported.
 *
 */

int
SetDeviceValuators (client, dev, valuators, first_valuator, num_valuators)
    register	ClientPtr	client;
    DeviceIntPtr dev;
    int		*valuators;
    int		first_valuator;
    int		num_valuators;
    {
    return BadMatch;
    }

/****************************************************************************
 *
 * Caller:	ProcXChangeDeviceControl
 *
 * Change the specified device controls on an extension input device.
 *
 */

int
ChangeDeviceControl (client, dev, control)
    register	ClientPtr	client;
    DeviceIntPtr dev;
    xDeviceCtl	*control;
    {
    switch (control->control)
	{
	case DEVICE_RESOLUTION:
	    return (BadMatch);
	default:
	    return (BadMatch);
	}
    }