a511c445de
Let the drivers only generate XI events and put those into the event queue.
When processing events, generate core events as needed. This fixes a number of
problems with XKB and the DIX in general.
The previous approach was to put core events and XI events as separate events
into the event queue. When being processed, the server had no knowledge of
them coming from the same device state change. Anything that would then change
the state of the device accordingly was in danger of changing it twice,
leading to some funny (i.e. not funny at all) results.
Emulating core events while processing XI events fixes this, there is only one
path that actually changes the device state now. Although we have to be
careful when replaying events from synced devices, otherwise we may lose
events.
Note: XI has precedence over core for passive grabs, but core events are
delivered to the client first.
This removes the wrapping added in 340911d724
310 lines
10 KiB
C
310 lines
10 KiB
C
/*
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*
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Copyright 1990, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from The Open Group.
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*
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* Author: Keith Packard, MIT X Consortium
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*/
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/*
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* MPX additions:
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* Copyright © 2006 Peter Hutterer
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* License see above.
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* Author: Peter Hutterer <peter@cs.unisa.edu.au>
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*
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*/
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/*
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* mieq.c
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*
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* Machine independent event queue
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*
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*/
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#if HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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# define NEED_EVENTS
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# include <X11/X.h>
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# include <X11/Xmd.h>
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# include <X11/Xproto.h>
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# include "misc.h"
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# include "windowstr.h"
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# include "pixmapstr.h"
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# include "inputstr.h"
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# include "mi.h"
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# include "mipointer.h"
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# include "scrnintstr.h"
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# include <X11/extensions/XI.h>
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# include <X11/extensions/XIproto.h>
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# include <X11/extensions/geproto.h>
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# include "extinit.h"
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# include "exglobals.h"
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#ifdef DPMSExtension
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# include "dpmsproc.h"
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# define DPMS_SERVER
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# include <X11/extensions/dpms.h>
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#endif
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#define QUEUE_SIZE 512
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#define EnqueueScreen(dev) dev->spriteInfo->sprite->pEnqueueScreen
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#define DequeueScreen(dev) dev->spriteInfo->sprite->pDequeueScreen
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typedef struct _Event {
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EventListPtr events;
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int nevents;
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ScreenPtr pScreen;
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DeviceIntPtr pDev; /* device this event _originated_ from */
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} EventRec, *EventPtr;
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typedef struct _EventQueue {
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HWEventQueueType head, tail; /* long for SetInputCheck */
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CARD32 lastEventTime; /* to avoid time running backwards */
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int lastMotion; /* device ID if last event motion? */
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EventRec events[QUEUE_SIZE]; /* static allocation for signals */
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mieqHandler handlers[128]; /* custom event handler */
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} EventQueueRec, *EventQueuePtr;
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static EventQueueRec miEventQueue;
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Bool
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mieqInit(void)
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{
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int i;
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miEventQueue.head = miEventQueue.tail = 0;
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miEventQueue.lastEventTime = GetTimeInMillis ();
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miEventQueue.lastMotion = FALSE;
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for (i = 0; i < 128; i++)
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miEventQueue.handlers[i] = NULL;
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for (i = 0; i < QUEUE_SIZE; i++)
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{
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EventListPtr evlist = InitEventList(7); /* 1 + MAX_VALUATOR_EVENTS */
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if (!evlist)
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FatalError("Could not allocate event queue.\n");
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miEventQueue.events[i].events = evlist;
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}
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SetInputCheck(&miEventQueue.head, &miEventQueue.tail);
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return TRUE;
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}
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/*
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* Must be reentrant with ProcessInputEvents. Assumption: mieqEnqueue
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* will never be interrupted. If this is called from both signal
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* handlers and regular code, make sure the signal is suspended when
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* called from regular code.
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*/
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void
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mieqEnqueue(DeviceIntPtr pDev, xEvent *e)
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{
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unsigned int oldtail = miEventQueue.tail, newtail;
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EventListPtr evt;
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int isMotion = 0;
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int evlen;
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/* avoid merging events from different devices */
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if (e->u.u.type == MotionNotify)
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isMotion = pDev->id;
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else if (e->u.u.type == DeviceMotionNotify)
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isMotion = pDev->id | (1 << 8); /* flag to indicate DeviceMotion */
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/* We silently steal valuator events: just tack them on to the last
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* motion event they need to be attached to. Sigh. */
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if (e->u.u.type == DeviceValuator) {
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deviceValuator *v = (deviceValuator *) e;
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EventPtr laste;
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deviceKeyButtonPointer *lastkbp;
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laste = &miEventQueue.events[(oldtail - 1) % QUEUE_SIZE];
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lastkbp = (deviceKeyButtonPointer *) laste->events->event;
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if (laste->nevents > 6) {
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ErrorF("mieqEnqueue: more than six valuator events; dropping.\n");
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return;
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}
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if (oldtail == miEventQueue.head ||
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!(lastkbp->type == DeviceMotionNotify ||
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lastkbp->type == DeviceButtonPress ||
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lastkbp->type == DeviceButtonRelease) ||
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((lastkbp->deviceid & DEVICE_BITS) !=
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(v->deviceid & DEVICE_BITS))) {
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ErrorF("mieqEnequeue: out-of-order valuator event; dropping.\n");
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return;
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}
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memcpy((laste->events[laste->nevents++].event), e, sizeof(xEvent));
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return;
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}
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if (isMotion && isMotion == miEventQueue.lastMotion &&
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oldtail != miEventQueue.head) {
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oldtail = (oldtail - 1) % QUEUE_SIZE;
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}
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else {
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newtail = (oldtail + 1) % QUEUE_SIZE;
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/* Toss events which come in late. Usually this means your server's
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* stuck in an infinite loop somewhere, but SIGIO is still getting
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* handled. */
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if (newtail == miEventQueue.head) {
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ErrorF("tossed event which came in late\n");
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return;
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}
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miEventQueue.tail = newtail;
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}
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evlen = sizeof(xEvent);
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if (e->u.u.type == GenericEvent)
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evlen += ((xGenericEvent*)e)->length * 4;
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evt = miEventQueue.events[oldtail].events;
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if (evt->evlen < evlen)
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{
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evt->evlen = evlen;
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evt->event = xrealloc(evt->event, evt->evlen);
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if (!evt->event)
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{
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ErrorF("Running out of memory. Tossing event.\n");
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return;
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}
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}
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memcpy(evt->event, e, evlen);
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miEventQueue.events[oldtail].nevents = 1;
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/* Make sure that event times don't go backwards - this
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* is "unnecessary", but very useful. */
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if (e->u.u.type != GenericEvent &&
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e->u.keyButtonPointer.time < miEventQueue.lastEventTime &&
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miEventQueue.lastEventTime - e->u.keyButtonPointer.time < 10000)
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evt->event->u.keyButtonPointer.time = miEventQueue.lastEventTime;
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miEventQueue.lastEventTime = evt->event->u.keyButtonPointer.time;
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miEventQueue.events[oldtail].pScreen = EnqueueScreen(pDev);
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miEventQueue.events[oldtail].pDev = pDev;
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miEventQueue.lastMotion = isMotion;
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}
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void
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mieqSwitchScreen(DeviceIntPtr pDev, ScreenPtr pScreen, Bool fromDIX)
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{
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EnqueueScreen(pDev) = pScreen;
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if (fromDIX)
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DequeueScreen(pDev) = pScreen;
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}
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void
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mieqSetHandler(int event, mieqHandler handler)
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{
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if (handler && miEventQueue.handlers[event])
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ErrorF("mieq: warning: overriding existing handler %p with %p for "
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"event %d\n", miEventQueue.handlers[event], handler, event);
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miEventQueue.handlers[event] = handler;
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}
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/* Call this from ProcessInputEvents(). */
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void
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mieqProcessInputEvents(void)
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{
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EventRec *e = NULL;
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int x = 0, y = 0;
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xEvent* event;
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while (miEventQueue.head != miEventQueue.tail) {
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if (screenIsSaved == SCREEN_SAVER_ON)
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SaveScreens (SCREEN_SAVER_OFF, ScreenSaverReset);
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#ifdef DPMSExtension
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else if (DPMSPowerLevel != DPMSModeOn)
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SetScreenSaverTimer();
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if (DPMSPowerLevel != DPMSModeOn)
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DPMSSet(DPMSModeOn);
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#endif
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e = &miEventQueue.events[miEventQueue.head];
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/* Assumption - screen switching can only occur on motion events. */
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miEventQueue.head = (miEventQueue.head + 1) % QUEUE_SIZE;
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if (e->pScreen != DequeueScreen(e->pDev)) {
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DequeueScreen(e->pDev) = e->pScreen;
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x = e->events[0].event->u.keyButtonPointer.rootX;
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y = e->events[0].event->u.keyButtonPointer.rootY;
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NewCurrentScreen (e->pDev, DequeueScreen(e->pDev), x, y);
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}
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else {
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/* If someone's registered a custom event handler, let them
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* steal it. */
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if (miEventQueue.handlers[e->events->event->u.u.type]) {
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miEventQueue.handlers[e->events->event->u.u.type](
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DequeueScreen(e->pDev)->myNum,
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e->events->event,
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e->pDev,
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e->nevents);
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return;
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}
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/* If this is a core event, make sure our keymap, et al, is
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* changed to suit. */
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if (e->events->event[0].u.u.type == KeyPress ||
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e->events->event[0].u.u.type == KeyRelease) {
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SwitchCoreKeyboard(e->pDev);
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}
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/* FIXME: Bad hack. The only event where we actually get multiple
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* events at once is a DeviceMotionNotify followed by
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* DeviceValuators. For now it's save enough to just take the
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* event directly or copy the bunch of events and pass in the
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* copy. Eventually the interface for the processInputProc needs
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* to be changed. (whot)
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*/
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if (e->nevents > 1)
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{
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int i;
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event = xcalloc(e->nevents, sizeof(xEvent));
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for (i = 0; i < e->nevents; i++)
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memcpy(&event[i], e->events[i].event, sizeof(xEvent));
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}
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else
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{
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event = e->events->event;
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}
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e->pDev->public.processInputProc(event, e->pDev, e->nevents);
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if (e->nevents > 1)
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xfree(event);
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}
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/* Update the sprite now. Next event may be from different device. */
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if (e->events->event[0].u.u.type == DeviceMotionNotify
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&& e->pDev->coreEvents)
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{
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miPointerUpdateSprite(e->pDev);
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}
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}
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}
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