393 lines
12 KiB
C
393 lines
12 KiB
C
/*
|
|
*
|
|
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
|
|
*/
|
|
|
|
/*
|
|
* mieq.c
|
|
*
|
|
* Machine independent event queue
|
|
*
|
|
*/
|
|
|
|
#if HAVE_DIX_CONFIG_H
|
|
#include <dix-config.h>
|
|
#endif
|
|
|
|
# include <X11/X.h>
|
|
# include <X11/Xmd.h>
|
|
# include <X11/Xproto.h>
|
|
# include "misc.h"
|
|
# include "windowstr.h"
|
|
# include "pixmapstr.h"
|
|
# include "inputstr.h"
|
|
# include "mi.h"
|
|
# include "mipointer.h"
|
|
# include "scrnintstr.h"
|
|
# include <X11/extensions/XI.h>
|
|
# include <X11/extensions/XIproto.h>
|
|
# include <X11/extensions/geproto.h>
|
|
# include "extinit.h"
|
|
# include "exglobals.h"
|
|
|
|
#ifdef DPMSExtension
|
|
# include "dpmsproc.h"
|
|
# define DPMS_SERVER
|
|
# include <X11/extensions/dpms.h>
|
|
#endif
|
|
|
|
#define QUEUE_SIZE 512
|
|
|
|
#define EnqueueScreen(dev) dev->spriteInfo->sprite->pEnqueueScreen
|
|
#define DequeueScreen(dev) dev->spriteInfo->sprite->pDequeueScreen
|
|
|
|
typedef struct _Event {
|
|
EventListPtr events;
|
|
int nevents;
|
|
ScreenPtr pScreen;
|
|
DeviceIntPtr pDev; /* device this event _originated_ from */
|
|
} EventRec, *EventPtr;
|
|
|
|
typedef struct _EventQueue {
|
|
HWEventQueueType head, tail; /* long for SetInputCheck */
|
|
CARD32 lastEventTime; /* to avoid time running backwards */
|
|
int lastMotion; /* device ID if last event motion? */
|
|
EventRec events[QUEUE_SIZE]; /* static allocation for signals */
|
|
mieqHandler handlers[128]; /* custom event handler */
|
|
} EventQueueRec, *EventQueuePtr;
|
|
|
|
static EventQueueRec miEventQueue;
|
|
static EventListPtr masterEvents; /* for use in mieqProcessInputEvents */
|
|
|
|
Bool
|
|
mieqInit(void)
|
|
{
|
|
int i;
|
|
|
|
miEventQueue.head = miEventQueue.tail = 0;
|
|
miEventQueue.lastEventTime = GetTimeInMillis ();
|
|
miEventQueue.lastMotion = FALSE;
|
|
for (i = 0; i < 128; i++)
|
|
miEventQueue.handlers[i] = NULL;
|
|
for (i = 0; i < QUEUE_SIZE; i++)
|
|
{
|
|
EventListPtr evlist = InitEventList(1 + MAX_VALUATOR_EVENTS);
|
|
if (!evlist)
|
|
FatalError("Could not allocate event queue.\n");
|
|
miEventQueue.events[i].events = evlist;
|
|
}
|
|
|
|
/* XXX: mE is just 1 event long, if we have Motion + Valuator they are
|
|
* squashed into the first event to make passing it into the event
|
|
* processing handlers easier. This should be fixed when the processing
|
|
* handlers switch to EventListPtr instead of xEvent */
|
|
masterEvents = InitEventList(1);
|
|
if (!masterEvents)
|
|
FatalError("Could not allocated MD event queue.\n");
|
|
SetMinimumEventSize(masterEvents, 1,
|
|
(1 + MAX_VALUATOR_EVENTS) * sizeof(xEvent));
|
|
|
|
SetInputCheck(&miEventQueue.head, &miEventQueue.tail);
|
|
return TRUE;
|
|
}
|
|
|
|
/* Ensure all events in the EQ are at least size bytes. */
|
|
void
|
|
mieqResizeEvents(int min_size)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < QUEUE_SIZE; i++)
|
|
SetMinimumEventSize(miEventQueue.events[i].events, 7, min_size);
|
|
}
|
|
|
|
/*
|
|
* Must be reentrant with ProcessInputEvents. Assumption: mieqEnqueue
|
|
* 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
|
|
mieqEnqueue(DeviceIntPtr pDev, xEvent *e)
|
|
{
|
|
unsigned int oldtail = miEventQueue.tail;
|
|
EventListPtr evt;
|
|
int isMotion = 0;
|
|
int evlen;
|
|
|
|
|
|
/* avoid merging events from different devices */
|
|
if (e->u.u.type == MotionNotify)
|
|
isMotion = pDev->id;
|
|
else if (e->u.u.type == DeviceMotionNotify)
|
|
isMotion = pDev->id | (1 << 8); /* flag to indicate DeviceMotion */
|
|
|
|
/* We silently steal valuator events: just tack them on to the last
|
|
* motion event they need to be attached to. Sigh. */
|
|
if (e->u.u.type == DeviceValuator) {
|
|
deviceValuator *v = (deviceValuator *) e;
|
|
EventPtr laste;
|
|
deviceKeyButtonPointer *lastkbp;
|
|
|
|
laste = &miEventQueue.events[(oldtail - 1) % QUEUE_SIZE];
|
|
lastkbp = (deviceKeyButtonPointer *) laste->events->event;
|
|
|
|
if (laste->nevents > 6) {
|
|
ErrorF("[mi] mieqEnqueue: more than six valuator events; dropping.\n");
|
|
return;
|
|
}
|
|
if (oldtail == miEventQueue.head ||
|
|
!(lastkbp->type == DeviceMotionNotify ||
|
|
lastkbp->type == DeviceButtonPress ||
|
|
lastkbp->type == DeviceButtonRelease ||
|
|
lastkbp->type == ProximityIn ||
|
|
lastkbp->type == ProximityOut) ||
|
|
((lastkbp->deviceid & DEVICE_BITS) !=
|
|
(v->deviceid & DEVICE_BITS))) {
|
|
ErrorF("[mi] mieqEnequeue: out-of-order valuator event; dropping.\n");
|
|
return;
|
|
}
|
|
|
|
memcpy((laste->events[laste->nevents++].event), e, sizeof(xEvent));
|
|
return;
|
|
}
|
|
|
|
if (isMotion && isMotion == miEventQueue.lastMotion &&
|
|
oldtail != miEventQueue.head) {
|
|
oldtail = (oldtail - 1) % QUEUE_SIZE;
|
|
}
|
|
else {
|
|
static int stuck = 0;
|
|
/* Toss events which come in late. Usually this means your server's
|
|
* stuck in an infinite loop somewhere, but SIGIO is still getting
|
|
* handled. */
|
|
if (((oldtail + 1) % QUEUE_SIZE) == miEventQueue.head) {
|
|
ErrorF("[mi] EQ overflowing. The server is probably stuck "
|
|
"in an infinite loop.\n");
|
|
if (!stuck) {
|
|
xorg_backtrace();
|
|
stuck = 1;
|
|
}
|
|
return;
|
|
}
|
|
stuck = 0;
|
|
}
|
|
|
|
evlen = sizeof(xEvent);
|
|
if (e->u.u.type == GenericEvent)
|
|
evlen += ((xGenericEvent*)e)->length * 4;
|
|
|
|
evt = miEventQueue.events[oldtail].events;
|
|
if (evt->evlen < evlen)
|
|
{
|
|
evt->evlen = evlen;
|
|
evt->event = xrealloc(evt->event, evt->evlen);
|
|
if (!evt->event)
|
|
{
|
|
ErrorF("[mi] Running out of memory. Tossing event.\n");
|
|
return;
|
|
}
|
|
}
|
|
|
|
memcpy(evt->event, e, evlen);
|
|
miEventQueue.events[oldtail].nevents = 1;
|
|
|
|
/* Make sure that event times don't go backwards - this
|
|
* is "unnecessary", but very useful. */
|
|
if (e->u.u.type != GenericEvent &&
|
|
e->u.keyButtonPointer.time < miEventQueue.lastEventTime &&
|
|
miEventQueue.lastEventTime - e->u.keyButtonPointer.time < 10000)
|
|
evt->event->u.keyButtonPointer.time = miEventQueue.lastEventTime;
|
|
|
|
miEventQueue.lastEventTime = evt->event->u.keyButtonPointer.time;
|
|
miEventQueue.events[oldtail].pScreen = EnqueueScreen(pDev);
|
|
miEventQueue.events[oldtail].pDev = pDev;
|
|
|
|
miEventQueue.lastMotion = isMotion;
|
|
miEventQueue.tail = (oldtail + 1) % QUEUE_SIZE;
|
|
}
|
|
|
|
void
|
|
mieqSwitchScreen(DeviceIntPtr pDev, ScreenPtr pScreen, Bool fromDIX)
|
|
{
|
|
EnqueueScreen(pDev) = pScreen;
|
|
if (fromDIX)
|
|
DequeueScreen(pDev) = pScreen;
|
|
}
|
|
|
|
void
|
|
mieqSetHandler(int event, mieqHandler handler)
|
|
{
|
|
if (handler && miEventQueue.handlers[event])
|
|
ErrorF("[mi] mieq: warning: overriding existing handler %p with %p for "
|
|
"event %d\n", miEventQueue.handlers[event], handler, event);
|
|
|
|
miEventQueue.handlers[event] = handler;
|
|
}
|
|
|
|
/**
|
|
* Change the device id of the given event to the given device's id.
|
|
*/
|
|
static void
|
|
ChangeDeviceID(DeviceIntPtr dev, xEvent* event)
|
|
{
|
|
int type = event->u.u.type;
|
|
|
|
if (type == DeviceKeyPress || type == DeviceKeyRelease ||
|
|
type == DeviceButtonPress || type == DeviceButtonRelease ||
|
|
type == DeviceMotionNotify || type == ProximityIn ||
|
|
type == ProximityOut)
|
|
((deviceKeyButtonPointer*)event)->deviceid = dev->id;
|
|
else if (type == DeviceValuator)
|
|
((deviceValuator*)event)->deviceid = dev->id;
|
|
else if (type == GenericEvent)
|
|
{
|
|
/* FIXME: need to put something into XGE to make this saner */
|
|
if (GEIsType(event, IReqCode, XI_DeviceClassesChangedNotify))
|
|
{
|
|
// do nothing or drink a beer. your choice.
|
|
} else
|
|
DebugF("[mi] Unknown generic event (%d/%d), cannot change id.\n",
|
|
((xGenericEvent*)event)->extension,
|
|
((xGenericEvent*)event)->evtype);
|
|
} else
|
|
DebugF("[mi] Unknown event type (%d), cannot change id.\n", type);
|
|
}
|
|
|
|
/**
|
|
* Copy the given event into master.
|
|
* @param mdev The master device
|
|
* @param original The event as it came from the EQ
|
|
* @param master The event after being copied
|
|
* @param count Number of events in original.
|
|
*/
|
|
void
|
|
CopyGetMasterEvent(DeviceIntPtr mdev, xEvent* original,
|
|
EventListPtr master, int count)
|
|
{
|
|
int len = count * sizeof(xEvent);
|
|
|
|
/* Assumption: GenericEvents always have count 1 */
|
|
|
|
if (GEV(original)->type == GenericEvent)
|
|
len += GEV(original)->length * 4;
|
|
|
|
if (master->evlen < len)
|
|
SetMinimumEventSize(master, 1, len);
|
|
|
|
memcpy(master->event, original, len);
|
|
while (count--)
|
|
ChangeDeviceID(mdev, &master->event[count]);
|
|
}
|
|
|
|
/* Call this from ProcessInputEvents(). */
|
|
void
|
|
mieqProcessInputEvents(void)
|
|
{
|
|
mieqHandler handler;
|
|
EventRec *e = NULL;
|
|
int x = 0, y = 0;
|
|
int type, nevents, evlen, i;
|
|
ScreenPtr screen;
|
|
xEvent *event;
|
|
DeviceIntPtr dev = NULL,
|
|
master = NULL;
|
|
|
|
while (miEventQueue.head != miEventQueue.tail) {
|
|
e = &miEventQueue.events[miEventQueue.head];
|
|
|
|
/* GenericEvents always have nevents == 1 */
|
|
nevents = e->nevents;
|
|
evlen = (nevents > 1) ? sizeof(xEvent) : e->events->evlen;
|
|
event = xcalloc(nevents, evlen);
|
|
|
|
if (!event)
|
|
FatalError("[mi] No memory left for event processing.\n");
|
|
|
|
for (i = 0; i < nevents; i++)
|
|
memcpy(&event[i], e->events[i].event, evlen);
|
|
|
|
|
|
dev = e->pDev;
|
|
screen = e->pScreen;
|
|
|
|
miEventQueue.head = (miEventQueue.head + 1) % QUEUE_SIZE;
|
|
|
|
type = event->u.u.type;
|
|
master = (!dev->isMaster && dev->u.master) ? dev->u.master : NULL;
|
|
|
|
if (screenIsSaved == SCREEN_SAVER_ON)
|
|
dixSaveScreens (serverClient, SCREEN_SAVER_OFF, ScreenSaverReset);
|
|
#ifdef DPMSExtension
|
|
else if (DPMSPowerLevel != DPMSModeOn)
|
|
SetScreenSaverTimer();
|
|
|
|
if (DPMSPowerLevel != DPMSModeOn)
|
|
DPMSSet(serverClient, DPMSModeOn);
|
|
#endif
|
|
|
|
/* Custom event handler */
|
|
handler = miEventQueue.handlers[type];
|
|
|
|
if (screen != DequeueScreen(dev) && !handler) {
|
|
/* Assumption - screen switching can only occur on motion events. */
|
|
DequeueScreen(dev) = screen;
|
|
x = event->u.keyButtonPointer.rootX;
|
|
y = event->u.keyButtonPointer.rootY;
|
|
NewCurrentScreen (dev, DequeueScreen(dev), x, y);
|
|
}
|
|
else {
|
|
if (master)
|
|
CopyGetMasterEvent(master, event, masterEvents, nevents);
|
|
|
|
/* If someone's registered a custom event handler, let them
|
|
* steal it. */
|
|
if (handler)
|
|
{
|
|
handler(DequeueScreen(dev)->myNum, event, dev, nevents);
|
|
if (master)
|
|
handler(DequeueScreen(master)->myNum,
|
|
masterEvents->event, master, nevents);
|
|
} else
|
|
{
|
|
/* process slave first, then master */
|
|
dev->public.processInputProc(event, dev, nevents);
|
|
|
|
if (master)
|
|
master->public.processInputProc(masterEvents->event, master,
|
|
nevents);
|
|
}
|
|
|
|
xfree(event);
|
|
}
|
|
|
|
/* Update the sprite now. Next event may be from different device. */
|
|
if (type == DeviceMotionNotify && (master || dev->isMaster))
|
|
miPointerUpdateSprite(dev);
|
|
}
|
|
}
|
|
|