485 lines
14 KiB
C
485 lines
14 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 "inpututils.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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# include "eventstr.h"
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#ifdef DPMSExtension
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# include "dpmsproc.h"
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# include <X11/extensions/dpmsconst.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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InternalEvent* 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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#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 serverRunning;
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extern pthread_mutex_t serverRunningMutex;
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extern pthread_cond_t serverRunningCond;
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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(!serverRunning) {
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pthread_mutex_lock(&serverRunningMutex);
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while(!serverRunning)
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pthread_cond_wait(&serverRunningCond, &serverRunningMutex);
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pthread_mutex_unlock(&serverRunningMutex);
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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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if (miEventQueue.events[i].events == NULL) {
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InternalEvent* 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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}
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SetInputCheck(&miEventQueue.head, &miEventQueue.tail);
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return TRUE;
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}
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void
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mieqFini(void)
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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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{
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if (miEventQueue.events[i].events != NULL) {
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FreeEventList(miEventQueue.events[i].events, 1);
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miEventQueue.events[i].events = NULL;
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}
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}
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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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InternalEvent* 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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verify_internal_event(e);
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/* avoid merging events from different devices */
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if (e->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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if (!stuck) {
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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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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->any.length;
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evt = miEventQueue.events[oldtail].events;
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memcpy(evt, e, evlen);
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time = e->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->any.time = miEventQueue.lastEventTime;
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miEventQueue.lastEventTime = evt->any.time;
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miEventQueue.events[oldtail].pScreen = pDev ? EnqueueScreen(pDev) : NULL;
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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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/**
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* Changes the screen reference events are being enqueued from.
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* Input events are enqueued with a screen reference and dequeued and
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* processed with a (potentially different) screen reference.
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* This function is called whenever a new event has changed screen but is
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* still logically on the previous screen as seen by the client.
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* This usually happens whenever the visible cursor moves across screen
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* boundaries during event generation, before the same event is processed
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* and sent down the wire.
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*
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* @param pDev The device that triggered a screen change.
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* @param pScreen The new screen events are being enqueued for.
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* @param set_dequeue_screen If TRUE, pScreen is set as both enqueue screen
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* and dequeue screen.
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*/
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void
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mieqSwitchScreen(DeviceIntPtr pDev, ScreenPtr pScreen, Bool set_dequeue_screen)
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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 (set_dequeue_screen)
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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->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->device_event.deviceid = dev->id;
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break;
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#if XFreeXDGA
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case ET_DGAEvent:
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break;
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#endif
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case ET_RawKeyPress:
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case ET_RawKeyRelease:
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case ET_RawButtonPress:
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case ET_RawButtonRelease:
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case ET_RawMotion:
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event->raw_event.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->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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verify_internal_event(original);
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verify_internal_event(master);
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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->any.type == ET_ButtonPress ||
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original->any.type == ET_ButtonRelease)
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{
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int btn = original->device_event.detail.button;
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if (!sdev->button)
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return; /* Should never happen */
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master->device_event.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 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 copy The event after being copied
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* @return The master device or NULL if the device is a floating slave.
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*/
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DeviceIntPtr
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CopyGetMasterEvent(DeviceIntPtr sdev,
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InternalEvent* original, InternalEvent *copy)
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{
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DeviceIntPtr mdev;
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int len = original->any.length;
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int type = original->any.type;
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int mtype; /* which master type? */
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verify_internal_event(original);
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/* ET_XQuartz has sdev == NULL */
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if (!sdev || IsMaster(sdev) || IsFloating(sdev))
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return NULL;
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#if XFreeXDGA
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if (type == ET_DGAEvent)
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type = original->dga_event.subtype;
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#endif
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switch(type)
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{
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case ET_KeyPress:
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case ET_KeyRelease:
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mtype = MASTER_KEYBOARD;
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break;
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case ET_ButtonPress:
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case ET_ButtonRelease:
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case ET_Motion:
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case ET_ProximityIn:
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case ET_ProximityOut:
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mtype = MASTER_POINTER;
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break;
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default:
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mtype = MASTER_ATTACHED;
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break;
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}
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mdev = GetMaster(sdev, mtype);
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memcpy(copy, original, len);
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ChangeDeviceID(mdev, copy);
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FixUpEventForMaster(mdev, sdev, original, copy);
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return mdev;
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}
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/**
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* Post the given @event through the device hierarchy, as appropriate.
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* Use this function if an event must be posted for a given device during the
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* usual event processing cycle.
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*/
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void
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mieqProcessDeviceEvent(DeviceIntPtr dev,
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InternalEvent *event,
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ScreenPtr screen)
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{
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mieqHandler handler;
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int x = 0, y = 0;
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DeviceIntPtr master;
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InternalEvent mevent; /* master event */
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verify_internal_event(event);
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/* Custom event handler */
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handler = miEventQueue.handlers[event->any.type];
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switch (event->any.type) {
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/* Catch events that include valuator information and check if they
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* are changing the screen */
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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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if (dev && screen && screen != DequeueScreen(dev) && !handler) {
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DequeueScreen(dev) = screen;
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x = event->device_event.root_x;
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y = event->device_event.root_y;
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NewCurrentScreen (dev, DequeueScreen(dev), x, y);
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}
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break;
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default:
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break;
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}
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master = CopyGetMasterEvent(dev, event, &mevent);
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if (master)
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master->lastSlave = dev;
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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)
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{
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int screenNum = dev && DequeueScreen(dev) ? DequeueScreen(dev)->myNum : (screen ? screen->myNum : 0);
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handler(screenNum, event, dev);
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/* Check for the SD's master in case the device got detached
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* during event processing */
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if (master && !IsFloating(dev))
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handler(screenNum, &mevent, master);
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} else
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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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/* Check for the SD's master in case the device got detached
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* during event processing */
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if (master && !IsFloating(dev))
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master->public.processInputProc(&mevent, 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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ScreenPtr screen;
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static InternalEvent event;
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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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event = *e->events;
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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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master = (dev) ? GetMaster(dev, MASTER_ATTACHED) : 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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mieqProcessDeviceEvent(dev, &event, screen);
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/* Update the sprite now. Next event may be from different device. */
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if (event.any.type == ET_Motion && master)
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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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