763848d3ab
Don't pass xEvent* and count through to processing, pass a single InternalEvent. Custom handlers are disabled for the time being. And for extra fun, XKB's pointer motion emulation is disabled. But stick an error in there so that we get reminded should we forget about it. Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
428 lines
12 KiB
C
428 lines
12 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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# 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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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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static EventListPtr masterEvents; /* for use in mieqProcessInputEvents */
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#ifdef XQUARTZ
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#include <pthread.h>
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static pthread_mutex_t miEventQueueMutex = PTHREAD_MUTEX_INITIALIZER;
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extern BOOL serverInitComplete;
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extern pthread_mutex_t serverInitCompleteMutex;
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extern pthread_cond_t serverInitCompleteCond;
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static inline void wait_for_server_init(void) {
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/* If the server hasn't finished initializing, wait for it... */
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if(!serverInitComplete) {
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pthread_mutex_lock(&serverInitCompleteMutex);
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while(!serverInitComplete)
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pthread_cond_wait(&serverInitCompleteCond, &serverInitCompleteMutex);
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pthread_mutex_unlock(&serverInitCompleteMutex);
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}
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}
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#endif
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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(1);
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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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/* XXX: mE is just 1 event long, if we have Motion + Valuator they are
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* squashed into the first event to make passing it into the event
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* processing handlers easier. This should be fixed when the processing
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* handlers switch to EventListPtr instead of xEvent */
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masterEvents = InitEventList(1);
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if (!masterEvents)
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FatalError("Could not allocated MD event queue.\n");
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SetMinimumEventSize(masterEvents, 1,
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(1 + MAX_VALUATOR_EVENTS) * sizeof(xEvent));
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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, 1, 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, InternalEvent *e)
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{
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unsigned int oldtail = miEventQueue.tail;
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EventListPtr evt;
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int isMotion = 0;
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int evlen;
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Time time;
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#ifdef XQUARTZ
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wait_for_server_init();
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pthread_mutex_lock(&miEventQueueMutex);
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#endif
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/* avoid merging events from different devices */
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if (e->u.any.type == ET_Motion)
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isMotion = pDev->id;
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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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static int stuck = 0;
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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 (((oldtail + 1) % QUEUE_SIZE) == 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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if (!stuck) {
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xorg_backtrace();
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stuck = 1;
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}
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#ifdef XQUARTZ
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pthread_mutex_unlock(&miEventQueueMutex);
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#endif
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return;
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}
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stuck = 0;
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}
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evlen = e->u.any.length;
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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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#ifdef XQUARTZ
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pthread_mutex_unlock(&miEventQueueMutex);
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#endif
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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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time = e->u.any.time;
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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 (time < miEventQueue.lastEventTime &&
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miEventQueue.lastEventTime - time < 10000)
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e->u.any.time = miEventQueue.lastEventTime;
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miEventQueue.lastEventTime = ((InternalEvent*)evt->event)->u.any.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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miEventQueue.tail = (oldtail + 1) % QUEUE_SIZE;
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#ifdef XQUARTZ
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pthread_mutex_unlock(&miEventQueueMutex);
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#endif
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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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#ifdef XQUARTZ
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pthread_mutex_lock(&miEventQueueMutex);
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#endif
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EnqueueScreen(pDev) = pScreen;
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if (fromDIX)
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DequeueScreen(pDev) = pScreen;
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#ifdef XQUARTZ
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pthread_mutex_unlock(&miEventQueueMutex);
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#endif
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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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#ifdef XQUARTZ
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pthread_mutex_lock(&miEventQueueMutex);
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#endif
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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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#ifdef XQUARTZ
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pthread_mutex_unlock(&miEventQueueMutex);
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#endif
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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, InternalEvent* event)
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{
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switch(event->u.any.type)
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{
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case ET_Motion:
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case ET_KeyPress:
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case ET_KeyRelease:
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case ET_ButtonPress:
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case ET_ButtonRelease:
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case ET_ProximityIn:
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case ET_ProximityOut:
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case ET_Hierarchy:
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case ET_DeviceChanged:
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event->u.device.deviceid = dev->id;
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break;
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default:
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ErrorF("[mi] Unknown event type (%d), cannot change id.\n",
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event->u.any.type);
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}
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}
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static void
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FixUpEventForMaster(DeviceIntPtr mdev, DeviceIntPtr sdev,
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InternalEvent* original, InternalEvent *master)
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{
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/* Ensure chained button mappings, i.e. that the detail field is the
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* value of the mapped button on the SD, not the physical button */
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if (original->u.any.type == ET_ButtonPress ||
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original->u.any.type == ET_ButtonRelease)
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{
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int btn = original->u.device.detail.button;
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if (!sdev->button)
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return; /* Should never happen */
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master->u.device.detail.button = sdev->button->map[btn];
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}
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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 sdev The slave device the original event comes from
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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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*/
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void
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CopyGetMasterEvent(DeviceIntPtr mdev, DeviceIntPtr sdev,
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InternalEvent* original, EventListPtr master)
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{
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int len = original->u.any.length;
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InternalEvent *mevent;
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if (master->evlen < len)
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SetMinimumEventSize(master, 1, len);
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mevent = (InternalEvent*)master->event;
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memcpy(mevent, original, len);
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ChangeDeviceID(mdev, mevent);
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FixUpEventForMaster(mdev, sdev, original, mevent);
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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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mieqHandler handler;
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EventRec *e = NULL;
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int x = 0, y = 0;
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int type, evlen, i;
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ScreenPtr screen;
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static InternalEvent *event = NULL;
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static size_t event_size = 0;
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DeviceIntPtr dev = NULL,
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master = NULL;
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#ifdef XQUARTZ
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pthread_mutex_lock(&miEventQueueMutex);
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#endif
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while (miEventQueue.head != miEventQueue.tail) {
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e = &miEventQueue.events[miEventQueue.head];
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evlen = e->events->evlen;
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if(evlen > event_size)
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event = xrealloc(event, evlen);
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if (!event)
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FatalError("[mi] No memory left for event processing.\n");
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memcpy(event, e->events->event, evlen);
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dev = e->pDev;
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screen = e->pScreen;
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miEventQueue.head = (miEventQueue.head + 1) % QUEUE_SIZE;
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#ifdef XQUARTZ
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pthread_mutex_unlock(&miEventQueueMutex);
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#endif
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type = event->u.any.type;
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master = (!dev->isMaster && dev->u.master) ? dev->u.master : NULL;
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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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/* Custom event handler */
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handler = miEventQueue.handlers[type];
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if (screen && screen != DequeueScreen(dev) && !handler) {
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/* Assumption - screen switching can only occur on motion events. */
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DequeueScreen(dev) = screen;
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x = event->u.device.root_x;
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y = event->u.device.root_y;
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NewCurrentScreen (dev, DequeueScreen(dev), x, y);
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}
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else {
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if (master)
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CopyGetMasterEvent(master, dev, event, masterEvents);
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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 0
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if (handler)
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{
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/* FIXME: this is broken now, InternalEvents! */
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handler(DequeueScreen(dev)->myNum, event, dev, 1);
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if (master)
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handler(DequeueScreen(master)->myNum,
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masterEvents->event, master, 1);
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} else
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#endif
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{
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/* process slave first, then master */
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dev->public.processInputProc(event, dev);
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if (master)
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master->public.processInputProc(
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(InternalEvent*)masterEvents->event,
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master);
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}
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}
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/* Update the sprite now. Next event may be from different device. */
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if (event->u.any.type == ET_Motion && (master || dev->isMaster))
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miPointerUpdateSprite(dev);
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#ifdef XQUARTZ
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pthread_mutex_lock(&miEventQueueMutex);
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#endif
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}
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#ifdef XQUARTZ
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pthread_mutex_unlock(&miEventQueueMutex);
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#endif
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}
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