devices.c

远程桌面连接工具

/************************************************************

Copyright (c) 1987  X Consortium

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of the X Consortium shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from the X Consortium.


Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its 
documentation for any purpose and without fee is hereby granted, 
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 Digital not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.  

DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
DIGITAL 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.

********************************************************/


/* $XFree86: xc/programs/Xserver/dix/devices.c,v 3.11 1996/12/24 02:23:43 dawes Exp $ */
/* $XConsortium: devices.c /main/54 1996/09/25 00:45:00 dpw $ */

#include "X.h"
#include "misc.h"
#include "resource.h"
#define NEED_EVENTS
#define NEED_REPLIES
#include "Xproto.h"
#include "windowstr.h"
#include "inputstr.h"
#include "scrnintstr.h"
#include "cursorstr.h"
#include "dixstruct.h"
#include "site.h"
#define	XKB_IN_SERVER
#ifdef XKB
#include "XKBsrv.h"
#endif
#ifdef XCSECURITY
#define _SECURITY_SERVER
#include "extensions/security.h"
#endif

#include "dispatch.h"
#include "swaprep.h"
#include "dixevents.h"

DeviceIntPtr
_AddInputDevice(deviceProc, autoStart)
    DeviceProc deviceProc;
    Bool autoStart;
{
    register DeviceIntPtr dev;

    if (inputInfo.numDevices >= MAX_DEVICES)
	return (DeviceIntPtr)NULL;
    dev = (DeviceIntPtr) xalloc(sizeof(DeviceIntRec));
    if (!dev)
	return (DeviceIntPtr)NULL;
    dev->name = (char *)NULL;
    dev->type = 0;
    dev->id = inputInfo.numDevices;
    inputInfo.numDevices++;
    dev->public.on = FALSE;
    dev->public.processInputProc = (ProcessInputProc)NoopDDA;
    dev->public.realInputProc = (ProcessInputProc)NoopDDA;
    dev->public.enqueueInputProc = EnqueueEvent;
    dev->deviceProc = deviceProc;
    dev->startup = autoStart;
    dev->sync.frozen = FALSE;
    dev->sync.other = NullGrab;
    dev->sync.state = NOT_GRABBED;
    dev->sync.event = (xEvent *) NULL;
    dev->sync.evcount = 0;
    dev->grab = NullGrab;
    dev->grabTime = currentTime;
    dev->fromPassiveGrab = FALSE;
    dev->key = (KeyClassPtr)NULL;
    dev->valuator = (ValuatorClassPtr)NULL;
    dev->button = (ButtonClassPtr)NULL;
    dev->focus = (FocusClassPtr)NULL;
    dev->proximity = (ProximityClassPtr)NULL;
    dev->kbdfeed = (KbdFeedbackPtr)NULL;
    dev->ptrfeed = (PtrFeedbackPtr)NULL;
    dev->intfeed = (IntegerFeedbackPtr)NULL;
    dev->stringfeed = (StringFeedbackPtr)NULL;
    dev->bell = (BellFeedbackPtr)NULL;
    dev->leds = (LedFeedbackPtr)NULL;
    dev->next = inputInfo.off_devices;
#ifdef XKB
    dev->xkb_interest= NULL;
#endif
    inputInfo.off_devices = dev;
    return dev;
}

Bool
EnableDevice(dev)
    register DeviceIntPtr dev;
{
    register DeviceIntPtr *prev;

    for (prev = &inputInfo.off_devices;
	 *prev && (*prev != dev);
	 prev = &(*prev)->next)
	;
    if ((*prev != dev) || !dev->inited ||
	((*dev->deviceProc)(dev, DEVICE_ON) != Success))
	return FALSE;
    *prev = dev->next;
    dev->next = inputInfo.devices;
    inputInfo.devices = dev;
    return TRUE;
}

Bool
DisableDevice(dev)
    register DeviceIntPtr dev;
{
    register DeviceIntPtr *prev;

    for (prev = &inputInfo.devices;
	 *prev && (*prev != dev);
	 prev = &(*prev)->next)
	;
    if (*prev != dev)
	return FALSE;
    (void)(*dev->deviceProc)(dev, DEVICE_OFF);
    *prev = dev->next;
    dev->next = inputInfo.off_devices;
    inputInfo.off_devices = dev;
    return TRUE;
}

int
InitAndStartDevices()
{
    register DeviceIntPtr dev, next;

    for (dev = inputInfo.off_devices; dev; dev = dev->next)
	dev->inited = ((*dev->deviceProc)(dev, DEVICE_INIT) == Success);
    for (dev = inputInfo.off_devices; dev; dev = next)
    {
	next = dev->next;
	if (dev->inited && dev->startup)
	    (void)EnableDevice(dev);
    }
    for (dev = inputInfo.devices;
	 dev && (dev != inputInfo.keyboard);
	 dev = dev->next)
	;
    if (!dev || (dev != inputInfo.keyboard))
	return BadImplementation;
    for (dev = inputInfo.devices;
	 dev && (dev != inputInfo.pointer);
	 dev = dev->next)
	;
    if (!dev || (dev != inputInfo.pointer))
	return BadImplementation;
    return Success;
}

static void
#if NeedFunctionPrototypes
CloseDevice(register DeviceIntPtr dev)
#else
CloseDevice(dev)
    register DeviceIntPtr dev;
#endif
{
    KbdFeedbackPtr k, knext;
    PtrFeedbackPtr p, pnext;
    IntegerFeedbackPtr i, inext;
    StringFeedbackPtr s, snext;
    BellFeedbackPtr b, bnext;
    LedFeedbackPtr l, lnext;

    if (dev->inited)
	(void)(*dev->deviceProc)(dev, DEVICE_CLOSE);
    xfree(dev->name);
    if (dev->key)
    {
#ifdef XKB
	if (dev->key->xkbInfo)
	    XkbFreeInfo(dev->key->xkbInfo);
#endif
	xfree(dev->key->curKeySyms.map);
	xfree(dev->key->modifierKeyMap);
	xfree(dev->key);
    }
    xfree(dev->valuator);
#ifdef XKB
    if ((dev->button)&&(dev->button->xkb_acts))
	xfree(dev->button->xkb_acts);
#endif
    xfree(dev->button);
    if (dev->focus)
    {
	xfree(dev->focus->trace);
	xfree(dev->focus);
    }
    xfree(dev->proximity);
    for (k=dev->kbdfeed; k; k=knext)
    {
	knext = k->next;
#ifdef XKB
	if (k->xkb_sli)
	    XkbFreeSrvLedInfo(k->xkb_sli);
#endif
	xfree(k);
    }
    for (p=dev->ptrfeed; p; p=pnext)
    {
	pnext = p->next;
	xfree(p);
    }
    for (i=dev->intfeed; i; i=inext)
    {
	inext = i->next;
	xfree(i);
    }
    for (s=dev->stringfeed; s; s=snext)
    {
	snext = s->next;
	xfree(s->ctrl.symbols_supported);
	xfree(s->ctrl.symbols_displayed);
	xfree(s);
    }
    for (b=dev->bell; b; b=bnext)
    {
	bnext = b->next;
	xfree(b);
    }
    for (l=dev->leds; l; l=lnext)
    {
	lnext = l->next;
#ifdef XKB
	if (l->xkb_sli)
	    XkbFreeSrvLedInfo(l->xkb_sli);
#endif
	xfree(l);
    }
#ifdef XKB
    while (dev->xkb_interest) {
	XkbRemoveResourceClient((DevicePtr)dev,dev->xkb_interest->resource);
    }
#endif
    xfree(dev->sync.event);
    xfree(dev);
}

void
CloseDownDevices()
{
    register DeviceIntPtr dev, next;

    for (dev = inputInfo.devices; dev; dev = next)
    {
	next = dev->next;
	CloseDevice(dev);
    }
    for (dev = inputInfo.off_devices; dev; dev = next)
    {
	next = dev->next;
	CloseDevice(dev);
    }
    inputInfo.keyboard = NULL;
    inputInfo.pointer = NULL;
}

void
RemoveDevice(dev)
    register DeviceIntPtr dev;
{
    register DeviceIntPtr prev,tmp,next;

    prev= NULL;
    for (tmp= inputInfo.devices; tmp; (prev = tmp), (tmp = next)) {
	next = tmp->next;
	if (tmp==dev) {
	    CloseDevice(tmp);
	    if (prev==NULL)
		inputInfo.devices = next;
	    else
		prev->next = next;
	    inputInfo.numDevices--;
	    if (inputInfo.keyboard == tmp)
	        inputInfo.keyboard = NULL;
	    else if (inputInfo.pointer == tmp)
	        inputInfo.pointer = NULL;
	    return;
	}
    }

    prev= NULL;
    for (tmp= inputInfo.off_devices; tmp; (prev = tmp), (tmp = next)) {
	next = tmp->next;
	if (tmp==dev) {
	    CloseDevice(tmp);
	    if (prev==NULL)
		inputInfo.off_devices = next;
	    else
		prev->next = next;
	    inputInfo.numDevices--;
	    if (inputInfo.keyboard == tmp)
	        inputInfo.keyboard = NULL;
	    else if (inputInfo.pointer == tmp)
	        inputInfo.pointer = NULL;
	    return;
	}
    }
    ErrorF("Internal Error! Attempt to remove a non-existent device\n");
    return;
}

int
NumMotionEvents()
{
    return inputInfo.pointer->valuator->numMotionEvents;
}

void
_RegisterPointerDevice(device)
    DeviceIntPtr device;
{
    inputInfo.pointer = device;
#ifdef XKB
    if (noXkbExtension) {
	device->public.processInputProc = CoreProcessPointerEvent;
	device->public.realInputProc = CoreProcessPointerEvent;
    } else {
	device->public.processInputProc = ProcessPointerEvent;
	device->public.realInputProc = ProcessPointerEvent;
    }
#else
    device->public.processInputProc = ProcessPointerEvent;
    device->public.realInputProc = ProcessPointerEvent;
#endif
    device->ActivateGrab = ActivatePointerGrab;
    device->DeactivateGrab = DeactivatePointerGrab;
    if (!device->name)
    {
	char *p = "pointer";
	device->name = (char *)xalloc(strlen(p) + 1);
	strcpy(device->name, p);
    }
}

void
_RegisterKeyboardDevice(device)
    DeviceIntPtr device;
{
    inputInfo.keyboard = device;
#ifdef XKB
    if (noXkbExtension) {
	device->public.processInputProc = CoreProcessKeyboardEvent;
	device->public.realInputProc = CoreProcessKeyboardEvent;
    } else {
	device->public.processInputProc = ProcessKeyboardEvent;
	device->public.realInputProc = ProcessKeyboardEvent;
    }
#else
    device->public.processInputProc = ProcessKeyboardEvent;
    device->public.realInputProc = ProcessKeyboardEvent;
#endif
    device->ActivateGrab = ActivateKeyboardGrab;
    device->DeactivateGrab = DeactivateKeyboardGrab;
    if (!device->name)
    {
	char *k = "keyboard";
	device->name = (char *)xalloc(strlen(k) + 1);
	strcpy(device->name, k);
    }
}

DevicePtr
LookupKeyboardDevice()
{
    return inputInfo.keyboard ? &inputInfo.keyboard->public : NULL;
}

DevicePtr
LookupPointerDevice()
{
    return inputInfo.pointer ? &inputInfo.pointer->public : NULL;
}

DevicePtr
LookupDevice(id)
    int id;
{
    DeviceIntPtr dev;

    for (dev=inputInfo.devices; dev; dev=dev->next) {
        if (dev->id == (CARD8)id)
            return (DevicePtr)dev;
    }
    for (dev=inputInfo.off_devices; dev; dev=dev->next) {
        if (dev->id == (CARD8)id)
            return (DevicePtr)dev;
    }
    return NULL;
}

void
QueryMinMaxKeyCodes(minCode, maxCode)
    KeyCode *minCode, *maxCode;
{
    if (inputInfo.keyboard) {
	*minCode = inputInfo.keyboard->key->curKeySyms.minKeyCode;
	*maxCode = inputInfo.keyboard->key->curKeySyms.maxKeyCode;
    }
}

Bool
SetKeySymsMap(dst, src)
    register KeySymsPtr dst, src;
{
    int i, j;
    int rowDif = src->minKeyCode - dst->minKeyCode;
           /* if keysym map size changes, grow map first */

    if (src->mapWidth < dst->mapWidth)
    {
        for (i = src->minKeyCode; i <= src->maxKeyCode; i++)
	{
#define SI(r, c) (((r-src->minKeyCode)*src->mapWidth) + (c))
#define DI(r, c) (((r - dst->minKeyCode)*dst->mapWidth) + (c))
	    for (j = 0; j < src->mapWidth; j++)
		dst->map[DI(i, j)] = src->map[SI(i, j)];
	    for (j = src->mapWidth; j < dst->mapWidth; j++)
		dst->map[DI(i, j)] = NoSymbol;
#undef SI
#undef DI
	}
	return TRUE;
    }
    else if (src->mapWidth > dst->mapWidth)
    {
        KeySym *map;
	int bytes = sizeof(KeySym) * src->mapWidth *
		    (dst->maxKeyCode - dst->minKeyCode + 1);
        map = (KeySym *)xalloc(bytes);
	if (!map)
	    return FALSE;
	bzero((char *)map, bytes);
        if (dst->map)
	{
            for (i = 0; i <= dst->maxKeyCode-dst->minKeyCode; i++)
		memmove((char *)&map[i*src->mapWidth],
			(char *)&dst->map[i*dst->mapWidth],
		      dst->mapWidth * sizeof(KeySym));
	    xfree(dst->map);
	}
	dst->mapWidth = src->mapWidth;
	dst->map = map;
    }
    memmove((char *)&dst->map[rowDif * dst->mapWidth],
	    (char *)src->map,
	  (int)(src->maxKeyCode - src->minKeyCode + 1) *
	  dst->mapWidth * sizeof(KeySym));
    return TRUE;
}

static Bool
#if NeedFunctionPrototypes
InitModMap(register KeyClassPtr keyc)
#else
InitModMap(keyc)
    register KeyClassPtr keyc;
#endif
{
    int i, j;
    CARD8 keysPerModifier[8];
    CARD8 mask;

    keyc->maxKeysPerModifier = 0;
    for (i = 0; i < 8; i++)
	keysPerModifier[i] = 0;
    for (i = 8; i < MAP_LENGTH; i++)
    {
	for (j = 0, mask = 1; j < 8; j++, mask <<= 1)
	{
	    if (mask & keyc->modifierMap[i])
	    {
		if (++keysPerModifier[j] > keyc->maxKeysPerModifier)
		    keyc->maxKeysPerModifier = keysPerModifier[j];
	    }
	}
    }
    keyc->modifierKeyMap = (KeyCode *)xalloc(8*keyc->maxKeysPerModifier);
    if (!keyc->modifierKeyMap && keyc->maxKeysPerModifier)
	return (FALSE);
    bzero((char *)keyc->modifierKeyMap, 8*(int)keyc->maxKeysPerModifier);
    for (i = 0; i < 8; i++)
	keysPerModifier[i] = 0;
    for (i = 8; i < MAP_LENGTH; i++)
    {
	for (j = 0, mask = 1; j < 8; j++, mask <<= 1)
	{
	    if (mask & keyc->modifierMap[i])
	    {
		keyc->modifierKeyMap[(j*keyc->maxKeysPerModifier) +
				     keysPerModifier[j]] = i;
		keysPerModifier[j]++;
	    }
	}
    }
    return TRUE;
}

Bool
InitKeyClassDeviceStruct(dev, pKeySyms, pModifiers)
    DeviceIntPtr dev;
    KeySymsPtr pKeySyms;
    CARD8 pModifiers[];
{
    int i;
    register KeyClassPtr keyc;

    keyc = (KeyClassPtr)xalloc(sizeof(KeyClassRec));
    if (!keyc)
	return FALSE;
    keyc->curKeySyms.map = (KeySym *)NULL;
    keyc->curKeySyms.mapWidth = 0;
    keyc->curKeySyms.minKeyCode = pKeySyms->minKeyCode;
    keyc->curKeySyms.maxKeyCode = pKeySyms->maxKeyCode;
    keyc->modifierKeyMap = (KeyCode *)NULL;
    keyc->state = 0;
    keyc->prev_state = 0;
    if (pModifiers)
	memmove((char *)keyc->modifierMap, (char *)pModifiers, MAP_LENGTH);
    else
	bzero((char *)keyc->modifierMap, MAP_LENGTH);
    bzero((char *)keyc->down, DOWN_LENGTH);
    for (i = 0; i < 8; i++)
	keyc->modifierKeyCount[i] = 0;
    if (!SetKeySymsMap(&keyc->curKeySyms, pKeySyms) || !InitModMap(keyc))
    {
	xfree(keyc->curKeySyms.map);
	xfree(keyc->modifierKeyMap);
	xfree(keyc);
	return FALSE;
    }
    dev->key = keyc;
#ifdef XKB
    dev->key->xkbInfo= NULL;
    if (!noXkbExtension) XkbInitDevice(dev);
#endif
    return TRUE;
}

Bool
InitButtonClassDeviceStruct(dev, numButtons, map)
    register DeviceIntPtr dev;