296 lines
11 KiB
C
296 lines
11 KiB
C
/*
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*
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* Copyright 1990, 1998 The Open Group
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*
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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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*
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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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*
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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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*
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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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* dmxeq.c is derived from mi/mieq.c so that XInput events can be handled
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*
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* Modified by: Rickard E. (Rik) Faith <faith@redhat.com>
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*
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* Copyright 2002-2003 Red Hat Inc., Durham, North Carolina.
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*
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation on the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NON-INFRINGEMENT. IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* 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
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* SOFTWARE.
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*/
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/** \file
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* This file provides an event queue that knows about XInput events.
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* All of the code is based on mi/mieq.c and was modified as little as
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* possible to provide XInput event support (the copyright and some of
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* the comments are from The Open Group, Keith Packard, MIT X
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* Consortium). (Another example of similar code is provided in
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* hw/xfree86/common/xf86Xinput.c.) */
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#ifdef HAVE_DMX_CONFIG_H
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#include <dmx-config.h>
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#endif
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#define DMX_EQ_DEBUG 0
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#include "dmx.h"
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#include "dmxeq.h"
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#include "dmxinput.h"
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#include "dmxlog.h"
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#include "dmxdpms.h"
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#include "inputstr.h"
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#include "scrnintstr.h" /* For screenInfo */
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#include <X11/extensions/XIproto.h>
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#if DMX_EQ_DEBUG
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#define DMXDBG2(f,a,b) dmxLog(dmxDebug,f,a,b)
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#define DMXDBG5(f,a,b,c,d,e) dmxLog(dmxDebug,f,a,b,c,d,e)
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#else
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#define DMXDBG2(f,a,b)
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#define DMXDBG5(f,a,b,c,d,e)
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#endif
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/** The size of our queue. (The queue provided by mi/mieq.c has a size
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* of 256.) */
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#define QUEUE_SIZE 256
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/** Information about the event. */
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typedef struct _Event {
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xEvent event; /**< Event. */
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ScreenPtr pScreen; /**< Screen on which event occurred. */
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deviceValuator valuator; /**< XInput device valuator information. */
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DeviceIntPtr pDev;
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} EventRec, *EventPtr;
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/** Event queue. */
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typedef struct _EventQueue {
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HWEventQueueType head; /**< Queue head; must be long for SetInputCheck. */
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HWEventQueueType tail; /**< Queue tail; must be long for SetInputCheck. */
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CARD32 lastEventTime; /**< To avoid time running backwards. */
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Bool lastMotion; /**< True if last event was motion. */
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EventRec events[QUEUE_SIZE]; /**< Static allocation for signals. */
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DevicePtr pKbd, pPtr; /**< Device pointers (to get funcs) */
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ScreenPtr pEnqueueScreen;/**< Screen events are delivered to. */
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ScreenPtr pDequeueScreen;/**< Screen events are dispatched to. */
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} EventQueueRec, *EventQueuePtr;
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static EventQueueRec dmxEventQueue;
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static Bool dmxeqInitializedFlag = FALSE;
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Bool dmxeqInitialized(void)
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{
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return dmxeqInitializedFlag;
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}
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Bool dmxeqInit(DevicePtr pKbd, DevicePtr pPtr)
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{
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static unsigned long dmxGeneration = 0;
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if (dmxGeneration == serverGeneration && dmxeqInitializedFlag)
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return FALSE;
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dmxGeneration = serverGeneration;
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dmxeqInitializedFlag = TRUE;
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dmxEventQueue.head = 0;
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dmxEventQueue.tail = 0;
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dmxEventQueue.lastEventTime = GetTimeInMillis();
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dmxEventQueue.pKbd = pKbd;
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dmxEventQueue.pPtr = pPtr;
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dmxEventQueue.lastMotion = FALSE;
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dmxEventQueue.pEnqueueScreen = screenInfo.screens[0];
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dmxEventQueue.pDequeueScreen = dmxEventQueue.pEnqueueScreen;
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SetInputCheck(&dmxEventQueue.head, &dmxEventQueue.tail);
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return TRUE;
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}
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/**
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* This function adds an event to the end of the queue. If the event is
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* an XInput event, then the next event (the valuator event) is also
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* stored in the queue. If the new event has a time before the time of
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* the last event currently on the queue, then the time is updated for
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* the new event.
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*
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* Must be reentrant with ProcessInputEvents. Assumption: dmxeqEnqueue
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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 dmxeqEnqueue(DeviceIntPtr pDev, xEvent *e)
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{
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HWEventQueueType oldtail, newtail;
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Bool isMotion;
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oldtail = dmxEventQueue.tail;
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isMotion = e->u.u.type == MotionNotify;
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if (isMotion
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&& dmxEventQueue.lastMotion
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&& oldtail != dmxEventQueue.head) {
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if (oldtail == 0) oldtail = QUEUE_SIZE;
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oldtail = oldtail - 1;
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} else {
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newtail = oldtail + 1;
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if (newtail == QUEUE_SIZE) newtail = 0;
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/* Toss events which come in late */
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if (newtail == dmxEventQueue.head) return;
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dmxEventQueue.tail = newtail;
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}
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DMXDBG2("dmxeqEnqueue %d %d\n", dmxEventQueue.head, dmxEventQueue.tail);
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dmxEventQueue.lastMotion = isMotion;
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dmxEventQueue.events[oldtail].pScreen = dmxEventQueue.pEnqueueScreen;
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/* Store the event in the queue */
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dmxEventQueue.events[oldtail].event = *e;
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dmxEventQueue.events[oldtail].pDev = pDev;
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/* If this is an XInput event, store the
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* valuator event, too */
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deviceKeyButtonPointer *ev = (deviceKeyButtonPointer *)e;
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if (e->u.u.type >= LASTEvent && (ev->deviceid & MORE_EVENTS))
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dmxEventQueue.events[oldtail].valuator = *(deviceValuator *)(ev+1);
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/* Make sure that event times don't go
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* backwards - this is "unnecessary",
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* but very useful */
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if (e->u.keyButtonPointer.time < dmxEventQueue.lastEventTime
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&& dmxEventQueue.lastEventTime - e->u.keyButtonPointer.time < 10000) {
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dmxEventQueue.events[oldtail].event.u.keyButtonPointer.time =
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dmxEventQueue.lastEventTime;
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}
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}
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/** Make \a pScreen the new screen for enqueueing events. If \a fromDIX
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* is TRUE, also make \a pScreen the new screen for dequeuing events. */
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void dmxeqSwitchScreen(DeviceIntPtr pDev, ScreenPtr pScreen, Bool fromDIX)
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{
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dmxEventQueue.pEnqueueScreen = pScreen;
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if (fromDIX) dmxEventQueue.pDequeueScreen = pScreen;
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}
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static void dmxeqProcessXInputEvent(xEvent *xe, EventRec *e)
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{
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deviceKeyButtonPointer *ev = (deviceKeyButtonPointer *)xe;
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int id = ev->deviceid & DEVICE_BITS;
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DeviceIntPtr pDevice;
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dixLookupDevice(&pDevice, id, serverClient, DixUnknownAccess);
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if (!pDevice) {
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dmxLog(dmxError, "dmxeqProcessInputEvents: id %d not found\n", id);
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return;
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}
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if (!pDevice->public.processInputProc) {
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dmxLog(dmxError,
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"dmxeqProcessInputEvents: no processInputProc for"
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" device id %d (%s)\n", id, pDevice->name);
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return;
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}
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if (ev->deviceid & MORE_EVENTS) {
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xe[1] = *(xEvent *)(&e->valuator);
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pDevice->public.processInputProc(xe, pDevice, 2);
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} else {
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pDevice->public.processInputProc(xe, pDevice, 1);
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}
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}
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/**
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* This function is called from #ProcessInputEvents() to remove events
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* from the queue and process them.
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*/
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void dmxeqProcessInputEvents(void)
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{
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EventRec *e;
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int x, y;
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xEvent xe[2];
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while (dmxEventQueue.head != dmxEventQueue.tail) {
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dmxDPMSWakeup(); /* Handles screen saver and DPMS */
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e = &dmxEventQueue.events[dmxEventQueue.head];
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DMXDBG5("dmxeqProcessInputEvents: type=%d screen=%p,%p root=%d,%d\n",
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e->event.u.u.type,
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e->pScreen, dmxEventQueue.pDequeueScreen,
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e->event.u.keyButtonPointer.rootX,
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e->event.u.keyButtonPointer.rootY);
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/*
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* Assumption - screen switching can only occur on core motion events
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*/
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if (e->event.u.u.type == MotionNotify
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&& e->pScreen != dmxEventQueue.pDequeueScreen) {
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dmxEventQueue.pDequeueScreen = e->pScreen;
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x = e->event.u.keyButtonPointer.rootX;
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y = e->event.u.keyButtonPointer.rootY;
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if (dmxEventQueue.head == QUEUE_SIZE - 1) dmxEventQueue.head = 0;
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else ++dmxEventQueue.head;
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NewCurrentScreen(e->pDev, dmxEventQueue.pDequeueScreen, x, y);
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} else {
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xe[0] = e->event;
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if (dmxEventQueue.head == QUEUE_SIZE - 1) dmxEventQueue.head = 0;
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else ++dmxEventQueue.head;
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switch (xe[0].u.u.type) {
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case KeyPress:
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case KeyRelease:
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if (!dmxEventQueue.pKbd) {
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dmxLog(dmxError, "dmxeqProcessInputEvents: No keyboard\n");
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return;
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}
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dmxEventQueue.pKbd
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->processInputProc(xe,
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(DeviceIntPtr)dmxEventQueue.pKbd, 1);
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break;
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default:
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dmxeqProcessXInputEvent(xe, e);
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break;
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case ButtonPress:
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case ButtonRelease:
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case MotionNotify:
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if (!dmxEventQueue.pPtr) {
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dmxLog(dmxError, "dmxeqProcessInputEvents: No mouse\n");
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return;
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}
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dmxEventQueue.pPtr
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->processInputProc(xe,
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(DeviceIntPtr)dmxEventQueue.pPtr, 1);
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break;
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}
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}
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}
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}
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