+++ /dev/null
-/*
- * $XConsortium: mieq.c,v 1.8 94/11/02 15:59:29 kaleb Exp $
- *
-Copyright (c) 1990 X Consortium
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
-AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-Except as contained in this notice, the name of the X Consortium shall not be
-used in advertising or otherwise to promote the sale, use or other dealings
-in this Software without prior written authorization from the X Consortium.
- *
- * Author: Keith Packard, MIT X Consortium
- */
-
-/*
- * mieq.c
- *
- * Machine independent event queue
- *
- */
-
-# define NEED_EVENTS
-# include "X.h"
-# include "Xmd.h"
-# include "Xproto.h"
-# include "misc.h"
-# include "windowstr.h"
-# include "pixmapstr.h"
-# include "inputstr.h"
-# include "mi.h"
-# include "scrnintstr.h"
-
-#define QUEUE_SIZE 256
-
-typedef struct _Event {
- xEvent event;
- ScreenPtr pScreen;
-} EventRec, *EventPtr;
-
-typedef struct _EventQueue {
- HWEventQueueType head, tail; /* long for SetInputCheck */
- CARD32 lastEventTime; /* to avoid time running backwards */
- Bool lastMotion;
- EventRec events[QUEUE_SIZE]; /* static allocation for signals */
- DevicePtr pKbd, pPtr; /* device pointer, to get funcs */
- ScreenPtr pEnqueueScreen; /* screen events are being delivered to */
- ScreenPtr pDequeueScreen; /* screen events are being dispatched to */
-} EventQueueRec, *EventQueuePtr;
-
-static EventQueueRec miEventQueue;
-
-Bool
-mieqInit (pKbd, pPtr)
- DevicePtr pKbd, pPtr;
-{
- miEventQueue.head = miEventQueue.tail = 0;
- miEventQueue.lastEventTime = GetTimeInMillis ();
- miEventQueue.pKbd = pKbd;
- miEventQueue.pPtr = pPtr;
- miEventQueue.lastMotion = FALSE;
- miEventQueue.pEnqueueScreen = screenInfo.screens[0];
- miEventQueue.pDequeueScreen = miEventQueue.pEnqueueScreen;
- SetInputCheck (&miEventQueue.head, &miEventQueue.tail);
- return TRUE;
-}
-
-/*
- * Must be reentrant with ProcessInputEvents. Assumption: mieqEnqueue
- * will never be interrupted. If this is called from both signal
- * handlers and regular code, make sure the signal is suspended when
- * called from regular code.
- */
-
-void
-mieqEnqueue (e)
- xEvent *e;
-{
- HWEventQueueType oldtail, newtail, prevtail;
- Bool isMotion;
-
- oldtail = miEventQueue.tail;
- isMotion = e->u.u.type == MotionNotify;
- if (isMotion && miEventQueue.lastMotion && oldtail != miEventQueue.head)
- {
- if (oldtail == 0)
- oldtail = QUEUE_SIZE;
- oldtail = oldtail - 1;
- }
- else
- {
- newtail = oldtail + 1;
- if (newtail == QUEUE_SIZE)
- newtail = 0;
- /* Toss events which come in late */
- if (newtail == miEventQueue.head)
- return;
- miEventQueue.tail = newtail;
- }
- miEventQueue.lastMotion = isMotion;
- miEventQueue.events[oldtail].event = *e;
- /*
- * Make sure that event times don't go backwards - this
- * is "unnecessary", but very useful
- */
- if (e->u.keyButtonPointer.time < miEventQueue.lastEventTime &&
- miEventQueue.lastEventTime - e->u.keyButtonPointer.time < 10000)
- {
- miEventQueue.events[oldtail].event.u.keyButtonPointer.time =
- miEventQueue.lastEventTime;
- }
- miEventQueue.events[oldtail].pScreen = miEventQueue.pEnqueueScreen;
-}
-
-void
-mieqSwitchScreen (pScreen, fromDIX)
- ScreenPtr pScreen;
- Bool fromDIX;
-{
- miEventQueue.pEnqueueScreen = pScreen;
- if (fromDIX)
- miEventQueue.pDequeueScreen = pScreen;
-}
-
-/*
- * Call this from ProcessInputEvents()
- */
-
-mieqProcessInputEvents ()
-{
- EventRec *e;
- int x, y;
- xEvent xe;
-
- while (miEventQueue.head != miEventQueue.tail)
- {
- extern int screenIsSaved;
-
- if (screenIsSaved == SCREEN_SAVER_ON)
- SaveScreens (SCREEN_SAVER_OFF, ScreenSaverReset);
-
- e = &miEventQueue.events[miEventQueue.head];
- /*
- * Assumption - screen switching can only occur on motion events
- */
- if (e->pScreen != miEventQueue.pDequeueScreen)
- {
- miEventQueue.pDequeueScreen = e->pScreen;
- x = e->event.u.keyButtonPointer.rootX;
- y = e->event.u.keyButtonPointer.rootY;
- if (miEventQueue.head == QUEUE_SIZE - 1)
- miEventQueue.head = 0;
- else
- ++miEventQueue.head;
- NewCurrentScreen (miEventQueue.pDequeueScreen, x, y);
- }
- else
- {
- xe = e->event;
- if (miEventQueue.head == QUEUE_SIZE - 1)
- miEventQueue.head = 0;
- else
- ++miEventQueue.head;
- switch (xe.u.u.type)
- {
- case KeyPress:
- case KeyRelease:
- (*miEventQueue.pKbd->processInputProc)
- (&xe, (DeviceIntPtr)miEventQueue.pKbd, 1);
- break;
- default:
- (*miEventQueue.pPtr->processInputProc)
- (&xe, (DeviceIntPtr)miEventQueue.pPtr, 1);
- break;
- }
- }
- }
-}
projects / rdpsrv / blobdiff