256 lines
8.6 KiB
C
256 lines
8.6 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 "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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typedef struct _Event {
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xEvent event[7];
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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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ScreenPtr pEnqueueScreen; /* screen events are being delivered to */
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ScreenPtr pDequeueScreen; /* screen events are being dispatched to */
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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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miEventQueue.pEnqueueScreen = screenInfo.screens[0];
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miEventQueue.pDequeueScreen = miEventQueue.pEnqueueScreen;
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for (i = 0; i < 128; i++)
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miEventQueue.handlers[i] = NULL;
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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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int isMotion = 0;
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deviceValuator *v = (deviceValuator *) e;
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EventPtr laste = &miEventQueue.events[(oldtail - 1) %
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QUEUE_SIZE];
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deviceKeyButtonPointer *lastkbp = (deviceKeyButtonPointer *)
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&laste->event[0];
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if (e->u.u.type == MotionNotify)
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isMotion = inputInfo.pointer->id;
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else if (e->u.u.type == DeviceMotionNotify)
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isMotion = pDev->id;
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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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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->event[laste->nevents++]), 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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memcpy(&(miEventQueue.events[oldtail].event[0]), e, sizeof(xEvent));
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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.keyButtonPointer.time < miEventQueue.lastEventTime &&
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miEventQueue.lastEventTime - e->u.keyButtonPointer.time < 10000)
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miEventQueue.events[oldtail].event[0].u.keyButtonPointer.time =
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miEventQueue.lastEventTime;
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miEventQueue.lastEventTime =
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miEventQueue.events[oldtail].event[0].u.keyButtonPointer.time;
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miEventQueue.events[oldtail].pScreen = miEventQueue.pEnqueueScreen;
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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(ScreenPtr pScreen, Bool fromDIX)
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{
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miEventQueue.pEnqueueScreen = pScreen;
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if (fromDIX)
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miEventQueue.pDequeueScreen = 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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DeviceIntPtr dev = 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 != miEventQueue.pDequeueScreen) {
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miEventQueue.pDequeueScreen = e->pScreen;
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x = e->event[0].u.keyButtonPointer.rootX;
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y = e->event[0].u.keyButtonPointer.rootY;
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NewCurrentScreen (miEventQueue.pDequeueScreen, 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->event->u.u.type]) {
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miEventQueue.handlers[e->event->u.u.type](miEventQueue.pDequeueScreen->myNum,
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e->event, dev,
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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->event[0].u.u.type == KeyPress ||
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e->event[0].u.u.type == KeyRelease) {
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SwitchCoreKeyboard(e->pDev);
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dev = inputInfo.keyboard;
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}
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else if (e->event[0].u.u.type == MotionNotify ||
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e->event[0].u.u.type == ButtonPress ||
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e->event[0].u.u.type == ButtonRelease) {
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SwitchCorePointer(e->pDev);
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dev = inputInfo.pointer;
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}
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else {
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dev = e->pDev;
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}
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dev->public.processInputProc(e->event, dev, e->nevents);
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}
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}
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}
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