393 lines
13 KiB
C
393 lines
13 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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* 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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/* Ensure all events in the EQ are at least size bytes. */
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void
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mieqResizeEvents(int min_size)
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{
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int i;
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for (i = 0; i < QUEUE_SIZE; i++)
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SetMinimumEventSize(miEventQueue.events[i].events, 7, min_size);
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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("[mi] 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->type == ProximityIn ||
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lastkbp->type == ProximityOut) ||
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((lastkbp->deviceid & DEVICE_BITS) !=
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(v->deviceid & DEVICE_BITS))) {
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ErrorF("[mi] 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("[mi] EQ overflowing. The server is probably stuck "
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"in an infinite loop.\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("[mi] 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("[mi] 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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/**
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* Change the device id of the given event to the given device's id.
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*/
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static void
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ChangeDeviceID(DeviceIntPtr dev, xEvent* event)
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{
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int type = event->u.u.type;
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if (type == DeviceKeyPress || type == DeviceKeyRelease ||
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type == DeviceButtonPress || type == DeviceButtonRelease ||
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type == DeviceMotionNotify || type == ProximityIn ||
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type == ProximityOut)
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((deviceKeyButtonPointer*)event)->deviceid = dev->id;
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else if (type == DeviceValuator)
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((deviceValuator*)event)->deviceid = dev->id;
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else if (type == GenericEvent)
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{
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/* FIXME: need to put something into XGE to make this saner */
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if (GEIsType(event, IReqCode, XI_DeviceClassesChangedNotify))
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{
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// do nothing or drink a beer. your choice.
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} else
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DebugF("[mi] Unknown generic event (%d/%d), cannot change id.\n",
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((xGenericEvent*)event)->extension,
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((xGenericEvent*)event)->evtype);
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} else
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DebugF("[mi] Unknown event type (%d), cannot change id.\n", type);
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}
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/**
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* Copy the given event into master.
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* @param mdev The master device
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* @param original The event as it came from the EQ
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* @param master The event after being copied
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* @param count Number of events in original.
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*/
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static void
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CopyGetMasterEvent(DeviceIntPtr mdev, xEvent* original,
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xEvent** master, int count)
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{
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if (count > 1) {
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*master = xcalloc(count, sizeof(xEvent));
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if (!*master)
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FatalError("[mi] No memory left for master event.\n");
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while(count--)
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{
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memcpy(&(*master)[count], &original[count], sizeof(xEvent));
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ChangeDeviceID(mdev, &(*master)[count]);
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}
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} else
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{
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int len = sizeof(xEvent);
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if (original->u.u.type == GenericEvent)
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len += GEV(original)->length * 4;
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*master = xalloc(len);
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if (!*master)
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FatalError("[mi] No memory left for master event.\n");
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memcpy(*master, original, len);
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ChangeDeviceID(mdev, *master);
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}
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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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*master_event = NULL;
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while (miEventQueue.head != miEventQueue.tail) {
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if (screenIsSaved == SCREEN_SAVER_ON)
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dixSaveScreens (serverClient, 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(serverClient, 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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mieqHandler handler;
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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 safe 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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if (!event)
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FatalError("[mi] No memory left for event processing.\n");
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for (i = 0; i < e->nevents; i++)
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{
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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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event = e->events->event;
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if (!e->pDev->isMaster && e->pDev->u.master)
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{
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CopyGetMasterEvent(e->pDev->u.master, event,
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&master_event, e->nevents);
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} else
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master_event = NULL;
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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 ((handler = miEventQueue.handlers[e->events->event->u.u.type]))
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{
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handler(DequeueScreen(e->pDev)->myNum, e->events->event,
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e->pDev, e->nevents);
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if (!e->pDev->isMaster && e->pDev->u.master)
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{
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handler(DequeueScreen(e->pDev->u.master)->myNum,
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e->events->event, e->pDev->u.master, e->nevents);
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}
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} else
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{
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/* process slave first, then master */
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e->pDev->public.processInputProc(event, e->pDev, e->nevents);
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if (!e->pDev->isMaster && e->pDev->u.master)
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{
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e->pDev->u.master->public.processInputProc(master_event,
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e->pDev->u.master, e->nevents);
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}
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}
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if (e->nevents > 1)
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xfree(event);
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xfree(master_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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