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/*
*
* Copyright 1990, 1998 The Open Group
*
* 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.
*
* 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
* OPEN GROUP 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 Open Group 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 Open Group.
*
* Author: Keith Packard, MIT X Consortium
*/
/*
* dmxeq.c is derived from mi/mieq.c so that XInput events can be handled
*
* Modified by: Rickard E. (Rik) Faith <faith@redhat.com>
*
* Copyright 2002-2003 Red Hat Inc., Durham, North Carolina.
*
* All Rights Reserved.
*
* 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 on 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 (including the
* next paragraph) 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
* NON-INFRINGEMENT. IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
* 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.
*/
/** \file
* This file provides an event queue that knows about XInput events.
* All of the code is based on mi/mieq.c and was modified as little as
* possible to provide XInput event support (the copyright and some of
* the comments are from The Open Group, Keith Packard, MIT X
* Consortium). (Another example of similar code is provided in
* hw/xfree86/common/xf86Xinput.c.) */
#ifdef HAVE_DMX_CONFIG_H
#include <dmx-config.h>
#endif
#define DMX_EQ_DEBUG 0
#include "dmx.h"
#include "dmxeq.h"
#include "dmxinput.h"
#include "dmxlog.h"
#include "dmxdpms.h"
#include "inputstr.h"
#include "scrnintstr.h" /* For screenInfo */
#include <X11/extensions/XIproto.h>
#if DMX_EQ_DEBUG
#define DMXDBG2(f,a,b) dmxLog(dmxDebug,f,a,b)
#define DMXDBG5(f,a,b,c,d,e) dmxLog(dmxDebug,f,a,b,c,d,e)
#else
#define DMXDBG2(f,a,b)
#define DMXDBG5(f,a,b,c,d,e)
#endif
/** The size of our queue. (The queue provided by mi/mieq.c has a size
* of 256.) */
#define QUEUE_SIZE 256
/** Information about the event. */
typedef struct _Event {
xEvent event; /**< Event. */
ScreenPtr pScreen; /**< Screen on which event occurred. */
deviceValuator valuator; /**< XInput device valuator information. */
DeviceIntPtr pDev;
} EventRec, *EventPtr;
/** Event queue. */
typedef struct _EventQueue {
HWEventQueueType head; /**< Queue head; must be long for SetInputCheck. */
HWEventQueueType tail; /**< Queue tail; must be long for SetInputCheck. */
CARD32 lastEventTime; /**< To avoid time running backwards. */
Bool lastMotion; /**< True if last event was motion. */
EventRec events[QUEUE_SIZE]; /**< Static allocation for signals. */
DevicePtr pKbd, pPtr; /**< Device pointers (to get funcs) */
ScreenPtr pEnqueueScreen;/**< Screen events are delivered to. */
ScreenPtr pDequeueScreen;/**< Screen events are dispatched to. */
} EventQueueRec, *EventQueuePtr;
static EventQueueRec dmxEventQueue;
static Bool dmxeqInitializedFlag = FALSE;
Bool dmxeqInitialized(void)
{
return dmxeqInitializedFlag;
}
Bool dmxeqInit(DevicePtr pKbd, DevicePtr pPtr)
{
static unsigned long dmxGeneration = 0;
if (dmxGeneration == serverGeneration && dmxeqInitializedFlag)
return FALSE;
dmxGeneration = serverGeneration;
dmxeqInitializedFlag = TRUE;
dmxEventQueue.head = 0;
dmxEventQueue.tail = 0;
dmxEventQueue.lastEventTime = GetTimeInMillis();
dmxEventQueue.pKbd = pKbd;
dmxEventQueue.pPtr = pPtr;
dmxEventQueue.lastMotion = FALSE;
dmxEventQueue.pEnqueueScreen = screenInfo.screens[0];
dmxEventQueue.pDequeueScreen = dmxEventQueue.pEnqueueScreen;
SetInputCheck(&dmxEventQueue.head, &dmxEventQueue.tail);
return TRUE;
}
/**
* This function adds an event to the end of the queue. If the event is
* an XInput event, then the next event (the valuator event) is also
* stored in the queue. If the new event has a time before the time of
* the last event currently on the queue, then the time is updated for
* the new event.
*
* Must be reentrant with ProcessInputEvents. Assumption: dmxeqEnqueue
* will never be interrupted. If this is called from both signal
* handlers and regular code, make sure the signal is suspended when
* called from regular code.
*/
void dmxeqEnqueue(DeviceIntPtr pDev, xEvent *e)
{
HWEventQueueType oldtail, newtail;
Bool isMotion;
oldtail = dmxEventQueue.tail;
isMotion = e->u.u.type == MotionNotify;
if (isMotion
&& dmxEventQueue.lastMotion
&& oldtail != dmxEventQueue.head) {
if (oldtail == 0) oldtail = QUEUE_SIZE;
oldtail = oldtail - 1;
} else {
newtail = oldtail + 1;
if (newtail == QUEUE_SIZE) newtail = 0;
/* Toss events which come in late */
if (newtail == dmxEventQueue.head) return;
dmxEventQueue.tail = newtail;
}
DMXDBG2("dmxeqEnqueue %d %d\n", dmxEventQueue.head, dmxEventQueue.tail);
dmxEventQueue.lastMotion = isMotion;
dmxEventQueue.events[oldtail].pScreen = dmxEventQueue.pEnqueueScreen;
/* Store the event in the queue */
dmxEventQueue.events[oldtail].event = *e;
dmxEventQueue.events[oldtail].pDev = pDev;
/* If this is an XInput event, store the
* valuator event, too */
deviceKeyButtonPointer *ev = (deviceKeyButtonPointer *)e;
if (e->u.u.type >= LASTEvent && (ev->deviceid & MORE_EVENTS))
dmxEventQueue.events[oldtail].valuator = *(deviceValuator *)(ev+1);
/* Make sure that event times don't go
* backwards - this is "unnecessary",
* but very useful */
if (e->u.keyButtonPointer.time < dmxEventQueue.lastEventTime
&& dmxEventQueue.lastEventTime - e->u.keyButtonPointer.time < 10000) {
dmxEventQueue.events[oldtail].event.u.keyButtonPointer.time =
dmxEventQueue.lastEventTime;
}
}
/** Make \a pScreen the new screen for enqueueing events. If \a fromDIX
* is TRUE, also make \a pScreen the new screen for dequeuing events. */
void dmxeqSwitchScreen(DeviceIntPtr pDev, ScreenPtr pScreen, Bool fromDIX)
{
dmxEventQueue.pEnqueueScreen = pScreen;
if (fromDIX) dmxEventQueue.pDequeueScreen = pScreen;
}
static void dmxeqProcessXInputEvent(xEvent *xe, EventRec *e)
{
deviceKeyButtonPointer *ev = (deviceKeyButtonPointer *)xe;
int id = ev->deviceid & DEVICE_BITS;
DeviceIntPtr pDevice;
dixLookupDevice(&pDevice, id, serverClient, DixUnknownAccess);
if (!pDevice) {
dmxLog(dmxError, "dmxeqProcessInputEvents: id %d not found\n", id);
return;
}
if (!pDevice->public.processInputProc) {
dmxLog(dmxError,
"dmxeqProcessInputEvents: no processInputProc for"
" device id %d (%s)\n", id, pDevice->name);
return;
}
if (ev->deviceid & MORE_EVENTS) {
xe[1] = *(xEvent *)(&e->valuator);
pDevice->public.processInputProc(xe, pDevice, 2);
} else {
pDevice->public.processInputProc(xe, pDevice, 1);
}
}
/**
* This function is called from #ProcessInputEvents() to remove events
* from the queue and process them.
*/
void dmxeqProcessInputEvents(void)
{
EventRec *e;
int x, y;
xEvent xe[2];
while (dmxEventQueue.head != dmxEventQueue.tail) {
dmxDPMSWakeup(); /* Handles screen saver and DPMS */
e = &dmxEventQueue.events[dmxEventQueue.head];
DMXDBG5("dmxeqProcessInputEvents: type=%d screen=%p,%p root=%d,%d\n",
e->event.u.u.type,
e->pScreen, dmxEventQueue.pDequeueScreen,
e->event.u.keyButtonPointer.rootX,
e->event.u.keyButtonPointer.rootY);
/*
* Assumption - screen switching can only occur on core motion events
*/
if (e->event.u.u.type == MotionNotify
&& e->pScreen != dmxEventQueue.pDequeueScreen) {
dmxEventQueue.pDequeueScreen = e->pScreen;
x = e->event.u.keyButtonPointer.rootX;
y = e->event.u.keyButtonPointer.rootY;
if (dmxEventQueue.head == QUEUE_SIZE - 1) dmxEventQueue.head = 0;
else ++dmxEventQueue.head;
NewCurrentScreen(e->pDev, dmxEventQueue.pDequeueScreen, x, y);
} else {
xe[0] = e->event;
if (dmxEventQueue.head == QUEUE_SIZE - 1) dmxEventQueue.head = 0;
else ++dmxEventQueue.head;
switch (xe[0].u.u.type) {
case KeyPress:
case KeyRelease:
if (!dmxEventQueue.pKbd) {
dmxLog(dmxError, "dmxeqProcessInputEvents: No keyboard\n");
return;
}
dmxEventQueue.pKbd
->processInputProc(xe,
(DeviceIntPtr)dmxEventQueue.pKbd, 1);
break;
default:
dmxeqProcessXInputEvent(xe, e);
break;
case ButtonPress:
case ButtonRelease:
case MotionNotify:
if (!dmxEventQueue.pPtr) {
dmxLog(dmxError, "dmxeqProcessInputEvents: No mouse\n");
return;
}
dmxEventQueue.pPtr
->processInputProc(xe,
(DeviceIntPtr)dmxEventQueue.pPtr, 1);
break;
}
}
}
}
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