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Annotation of researchv9/X11/src/X.V11R1/lib/Xtk/Event.c, revision 1.1

1.1     ! root        1: #ifndef lint
        !             2: static char rcsid[] = "$Header: Event.c,v 1.15 87/09/11 21:19:08 haynes Rel $";
        !             3: #endif lint
        !             4: 
        !             5: /*
        !             6:  * Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
        !             7:  * 
        !             8:  *                         All Rights Reserved
        !             9:  * 
        !            10:  * Permission to use, copy, modify, and distribute this software and its 
        !            11:  * documentation for any purpose and without fee is hereby granted, 
        !            12:  * provided that the above copyright notice appear in all copies and that
        !            13:  * both that copyright notice and this permission notice appear in 
        !            14:  * supporting documentation, and that the name of Digital Equipment
        !            15:  * Corporation not be used in advertising or publicity pertaining to
        !            16:  * distribution of the software without specific, written prior permission.  
        !            17:  * 
        !            18:  * 
        !            19:  * DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
        !            20:  * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
        !            21:  * DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
        !            22:  * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
        !            23:  * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
        !            24:  * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
        !            25:  * SOFTWARE.
        !            26:  */
        !            27: #include "Intrinsic.h"
        !            28: EventMask _XtBuildEventMask(widget)
        !            29:     Widget widget;
        !            30: {
        !            31:     _XtEventTable ev;
        !            32:     EventMask  mask = 0;
        !            33: 
        !            34:     for (ev = widget->core.event_table; ev != NULL; ev = ev->next)
        !            35:        mask |= ev->mask;
        !            36:     if (widget->core.widget_class->core_class.expose != NULL)
        !            37:        mask |= ExposureMask;
        !            38:     if (widget->core.widget_class->core_class.visible_interest) 
        !            39:        mask |= VisibilityChangeMask;
        !            40: 
        !            41:     return mask;
        !            42: }
        !            43: 
        !            44: void XtRemoveEventHandler(widget, eventMask, other, proc, closure)
        !            45:     Widget     widget;
        !            46:     EventMask   eventMask;
        !            47:     Boolean    other;
        !            48:     XtEventHandler proc;
        !            49:     Opaque     closure;
        !            50: {
        !            51:     XtEventRec *p, **pp;
        !            52:     EventMask oldMask = _XtBuildEventMask(widget);
        !            53: 
        !            54:     pp = &widget->core.event_table;
        !            55:     p = *pp;
        !            56: 
        !            57:     /* find it */
        !            58:     while (p != NULL && p->proc != proc && p->closure != closure) {
        !            59:        pp = &p->next;
        !            60:        p = *pp;
        !            61:     }
        !            62:     if (p == NULL) return; /* couldn't find it */
        !            63: 
        !            64:     /* un-register it */
        !            65:     p->mask &= ~eventMask;
        !            66:     p->non_filter = p->non_filter && ! other;
        !            67: 
        !            68:     if (p->mask == 0 && !p->non_filter) {
        !            69:        /* delete it entirely */
        !            70:        *pp = p->next;
        !            71:        XtFree((char *)p);
        !            72:     }
        !            73: 
        !            74:     /* reset select mask if realized */
        !            75:     if (XtIsRealized(widget)) {
        !            76:        EventMask mask = _XtBuildEventMask(widget);
        !            77: 
        !            78:        if (oldMask != mask)
        !            79:            XSelectInput(XtDisplay(widget), XtWindow(widget), mask);
        !            80:     }
        !            81: }
        !            82: 
        !            83: void XtAddEventHandler(widget, eventMask, other, proc, closure)
        !            84:     Widget         widget;
        !            85:     EventMask   eventMask;
        !            86:     Boolean         other;
        !            87:     XtEventHandler  proc;
        !            88:     Opaque     closure;
        !            89: {
        !            90:    register XtEventRec *p,**pp;
        !            91:    EventMask oldMask;
        !            92: 
        !            93:    if (eventMask == 0 && other == FALSE) return;
        !            94: 
        !            95:    if (XtIsRealized(widget)) oldMask = _XtBuildEventMask(widget);
        !            96: 
        !            97:    pp = & widget->core.event_table;
        !            98:    p = *pp;
        !            99:    while (p != NULL && p->proc != proc && p->closure != closure) {
        !           100:          pp = &p->next;
        !           101:          p = *pp;
        !           102:    }
        !           103: 
        !           104:    if (p == NULL) {
        !           105:        /* new proc to add to list */
        !           106:        p = (XtEventRec*) XtMalloc((unsigned)sizeof(XtEventRec));
        !           107:        p->proc = proc;
        !           108:        p->closure = closure;
        !           109:        p->mask = eventMask;
        !           110:        p->non_filter = other;
        !           111: 
        !           112:        p->next = widget->core.event_table;
        !           113:        widget->core.event_table = p;
        !           114: 
        !           115:     } else {
        !           116:        /* update existing proc */
        !           117:        p->mask |= eventMask;
        !           118:        p->non_filter = p->non_filter || other;
        !           119:     }
        !           120: 
        !           121:     if (XtIsRealized(widget)) {
        !           122:        EventMask mask = _XtBuildEventMask(widget);
        !           123: 
        !           124:        if (oldMask != mask)
        !           125:            XSelectInput(XtDisplay(widget), XtWindow(widget), mask);
        !           126:     }
        !           127: 
        !           128: }
        !           129: 
        !           130: typedef struct _HashRec *HashPtr;
        !           131: 
        !           132: typedef struct _HashRec {
        !           133:     Window     window;
        !           134:     Widget     widget;
        !           135:     HashPtr    next;
        !           136: } HashRec;
        !           137: 
        !           138: int sizes[] = {1009, 2003, 4007, 8017, 16033, 32063, 64151, 128257};
        !           139: #define NUMSIZES 8
        !           140: 
        !           141: typedef struct {
        !           142:     unsigned int       sizeIndex;
        !           143:     unsigned int       size;
        !           144:     unsigned int       count;
        !           145:     HashPtr            entries[1];
        !           146: } HashTableRec, *HashTable;
        !           147: 
        !           148: static HashTable table = NULL;
        !           149: 
        !           150: static void ExpandTable();
        !           151: 
        !           152: void RegisterWindow(window, widget)
        !           153:     Window window;
        !           154:     Widget widget;
        !           155: {
        !           156:     HashPtr hp, *hpp;
        !           157: 
        !           158:     if ((table->count + (table->count / 5)) >= table->size) ExpandTable();
        !           159: 
        !           160:     hpp = &table->entries[(unsigned int)window % table->size];
        !           161:     hp = *hpp;
        !           162: 
        !           163:     while (hp != NULL) {
        !           164:         if (hp->window == window) {
        !           165:            if (hp->widget != hp->widget)
        !           166:                XtWarning("Attempt to change already registered window.\n");
        !           167:            return;
        !           168:        }
        !           169:         hpp = &hp->next;
        !           170:        hp = *hpp;
        !           171:     }
        !           172: 
        !           173:     hp = *hpp = (HashPtr) XtMalloc((unsigned)sizeof(HashRec));
        !           174:     hp->window = window;
        !           175:     hp->widget = widget;
        !           176:     hp->next = NULL;
        !           177:     table->count++;
        !           178: }
        !           179: 
        !           180: 
        !           181: void UnregisterWindow(window, widget)
        !           182:     Window window;
        !           183:     Widget widget;
        !           184: {
        !           185:     HashPtr hp, *hpp;
        !           186: 
        !           187:     hpp = &table->entries[(unsigned int)window % table->size];
        !           188:     hp = *hpp;
        !           189: 
        !           190:     while (hp != NULL) {
        !           191:         if (hp->window == window) {
        !           192:            if (hp->widget != widget) {
        !           193:                XtWarning("Unregister-window does not match widget.\n");
        !           194:                 return;
        !           195:                 }
        !           196:              else /* found entry to delete */
        !           197:                   (*hpp) = hp->next;
        !           198:                   XtFree((char*)hp);
        !           199:                   table->count--;
        !           200:                   return;
        !           201:        }
        !           202:         hpp = &hp->next;
        !           203:        hp = *hpp;
        !           204:     }
        !           205:     
        !           206: }
        !           207: 
        !           208: static void ExpandTable()
        !           209: {
        !           210:     HashTable  oldTable = table;
        !           211:     unsigned int i;
        !           212: 
        !           213:     if (oldTable->sizeIndex == NUMSIZES) return;
        !           214: 
        !           215:     table = (HashTable) XtMalloc(
        !           216:        (unsigned) sizeof(HashTableRec)
        !           217:        +sizes[oldTable->sizeIndex+1]*sizeof(HashRec));
        !           218:     table->sizeIndex = oldTable->sizeIndex+1;
        !           219:     table->size = sizes[table->sizeIndex];
        !           220:     table->count = oldTable->count;
        !           221:     for (i = 0; i<oldTable->size; i++) {
        !           222:        HashPtr hp;
        !           223:        hp = oldTable->entries[i];
        !           224:        while (hp != NULL) {
        !           225:            HashPtr temp = hp;
        !           226:            RegisterWindow(hp->window, hp->widget);
        !           227:            hp = hp->next;
        !           228:            XtFree((char *) temp);
        !           229:        }
        !           230:     }
        !           231:     XtFree((char *)oldTable);
        !           232: }
        !           233: 
        !           234: 
        !           235: Widget ConvertWindowToWidget(window)
        !           236:     Window window;
        !           237: {
        !           238:     HashPtr hp;
        !           239: 
        !           240:     for (
        !           241:         hp = table->entries[(unsigned int)window % table->size];
        !           242:         hp != NULL;
        !           243:        hp = hp->next)
        !           244:        if (hp->window == window) return hp->widget;
        !           245: 
        !           246:     return NULL;
        !           247: }
        !           248: 
        !           249: void InitializeHash()
        !           250: {
        !           251:     int i;
        !           252: 
        !           253:     table = (HashTable) XtMalloc(
        !           254:         (unsigned) sizeof(HashTableRec)+sizes[0]*sizeof(HashPtr));
        !           255: 
        !           256:     table->sizeIndex = 0;
        !           257:     table->size = sizes[0];
        !           258:     table->count = 0;
        !           259:     for (i=0; i<table->size; i++) table->entries[i] = NULL;
        !           260: }
        !           261: 
        !           262: 
        !           263: extern void ConvertTypeToMask();
        !           264: extern Boolean onGrabList();
        !           265: extern void DispatchEvent();
        !           266: 
        !           267: void XtDispatchEvent (event)
        !           268:     XEvent  *event;
        !           269: 
        !           270: {
        !           271:     Widget widget;
        !           272:     EventMask mask;
        !           273:     GrabType grabType;
        !           274:     Boolean sensitivity;
        !           275: #define IsSensitive ((!sensitivity) || (widget->core.sensitive && widget->core.ancestor_sensitive))
        !           276: 
        !           277:     widget =ConvertWindowToWidget (event->xany.window);
        !           278:     if (widget == NULL) return;
        !           279:     ConvertTypeToMask(event->xany.type, &mask, &grabType, &sensitivity);
        !           280:     if ((grabType == pass || grabList == NULL) && IsSensitive)
        !           281:            DispatchEvent(event,widget, mask);
        !           282:     else if (onGrabList(widget)) {
        !           283:            if (IsSensitive) DispatchEvent(event,widget,mask);
        !           284:            else DispatchEvent(event, grabList->widget, mask);
        !           285:            }  
        !           286:     else if (grabType == remap)
        !           287:            DispatchEvent(event,grabList->widget, mask);
        !           288:     return;
        !           289: }
        !           290: 
        !           291: Boolean onGrabList (widget)
        !           292:     Widget widget;
        !           293: 
        !           294: {
        !           295:    GrabRec* gl;
        !           296:    for (; widget != NULL; widget = (Widget)widget->core.parent)
        !           297:        for (gl = grabList; gl != NULL && gl->exclusive; gl = gl->next) 
        !           298:            if (gl->widget == widget) return (TRUE);
        !           299:    return (FALSE);
        !           300: }
        !           301: 
        !           302: void ConvertTypeToMask (eventType,mask,grabType,sensitive)
        !           303:     int eventType;
        !           304:     EventMask *mask;
        !           305:     GrabType *grabType;
        !           306:     Boolean *sensitive;
        !           307:     
        !           308: {
        !           309: 
        !           310: static MaskRec masks[] = {
        !           311:        {0,pass,not_sensitive}, /* should never see type = 0*/
        !           312:         {0,pass,not_sensitive},   /* should never see type = 1*/
        !           313:         {KeyPressMask,remap,is_sensitive}, /*KeyPress*/
        !           314:         {KeyReleaseMask,remap,is_sensitive}, /*KeyRelease*/
        !           315:         {ButtonPressMask,remap,is_sensitive}, /*ButtonPress*/
        !           316:         {ButtonReleaseMask,remap,is_sensitive}, /*ButtonRelease*/
        !           317:         {PointerMotionMask | Button1MotionMask | Button2MotionMask |
        !           318:             Button3MotionMask | Button4MotionMask | Button5MotionMask | ButtonMotionMask,
        !           319:            ignore,is_sensitive},               /*MotionNotify*/
        !           320:         {EnterWindowMask,ignore,is_sensitive}, /*EnterNotify*/
        !           321:         {LeaveWindowMask,ignore,is_sensitive}, /*LeaveNotify*/
        !           322:         {FocusChangeMask,ignore,is_sensitive}, /*FocusIn*/
        !           323:         {FocusChangeMask,ignore,is_sensitive}, /*FocusOut*/
        !           324:         {KeymapStateMask,ignore,not_sensitive},/*KeymapNotify*/
        !           325:         {ExposureMask,pass,not_sensitive},    /*Expose*/
        !           326:         {0,pass,not_sensitive},               /*GraphicsExpose*/
        !           327:         {0,pass,not_sensitive},               /*NoExpose*/
        !           328:         {VisibilityChangeMask,pass,not_sensitive}, /*VisibilityNotify*/
        !           329:         {0,pass,not_sensitive},                    /*CreateNotify should never come in*/
        !           330:         {StructureNotifyMask,pass,not_sensitive}, /*DestroyNotify*/
        !           331:         {StructureNotifyMask,pass,not_sensitive}, /*UnmapNotify*/
        !           332:         {StructureNotifyMask,pass,not_sensitive}, /*MapNotify*/
        !           333:         {0,pass,not_sensitive},                        /*MapRequest*/
        !           334:         {StructureNotifyMask,pass,not_sensitive}, /*ReparentNotify*/
        !           335:         {StructureNotifyMask,pass,not_sensitive}, /*ConfigureNotify*/
        !           336:         {0,pass,not_sensitive},                        /*ConfigureRequest*/
        !           337:         {StructureNotifyMask,pass,not_sensitive}, /*GravityNotify*/
        !           338:         {0,pass,not_sensitive},                        /*ResizeRequest*/
        !           339:         {StructureNotifyMask,pass,not_sensitive}, /*CirculateNotify*/
        !           340:         {0,pass,not_sensitive},                        /*CirculateRequest*/
        !           341:         {PropertyChangeMask,ignore,not_sensitive}, /*PropertyNotify*/
        !           342:         {0,ignore,not_sensitive},                      /*SelectionClear*/
        !           343:         {0,ignore,not_sensitive},                      /*SelectionRequest*/
        !           344:         {StructureNotifyMask,pass,not_sensitive}, /*SelectionNotify*/
        !           345:         {ColormapChangeMask,ignore,not_sensitive}, /*ColormapNotify*/
        !           346:         {0,ignore,not_sensitive},                      /*ClientMessage*/
        !           347:         {0 ,ignore,not_sensitive},              /*MappingNotify*/
        !           348:   };
        !           349:        (*mask) = masks[eventType].mask;
        !           350:         (*grabType) = masks[eventType].grabType;
        !           351:         (*sensitive) = masks[eventType].sensitive;
        !           352:    return;
        !           353: };
        !           354: 
        !           355: void DispatchEvent(event, widget, mask)
        !           356:     XEvent    *event;
        !           357:     Widget    widget;
        !           358:     unsigned long mask;
        !           359: 
        !           360: 
        !           361: {
        !           362:     XtEventRec *p;   
        !           363:     XtEventHandler proc[100];
        !           364:     Opaque closure[100];
        !           365:     int numprocs, i;
        !           366:     if (mask == ExposureMask) {
        !           367:       if ((widget->core.widget_class->core_class.compress_exposure)
        !           368:         && (event->xexpose.count != 0)) 
        !           369:         return;
        !           370:       if(widget->core.widget_class->core_class.expose != NULL)
        !           371:          widget->core.widget_class->core_class.expose (widget,event);
        !           372:     }
        !           373:     if ((mask == VisibilityNotify) &&
        !           374:             !(widget->core.widget_class->core_class.visible_interest)) return;
        !           375: 
        !           376:     /* Have to copy the procs into an array, because calling one of them */
        !           377:     /* might call XtRemoveEventHandler, which would break our linked list.*/
        !           378:     numprocs = 0;
        !           379:     for (p=widget->core.event_table; p != NULL; p = p->next)
        !           380:        if ((mask & p->mask) != 0 || (mask == 0 && p->non_filter)) {
        !           381:            proc[numprocs] = p->proc;
        !           382:            closure[numprocs++] = p->closure;
        !           383:        }
        !           384: 
        !           385:     for (i=0 ; i<numprocs ; i++)
        !           386:        (*(proc[i]))(widget, closure[i], event);
        !           387: }
        !           388: 
        !           389: 
        !           390: 
        !           391: void XtMainLoop()
        !           392: {
        !           393:     XEvent event;
        !           394: 
        !           395:     for (;;) {
        !           396:        XtNextEvent(&event);
        !           397:        XtDispatchEvent(&event);
        !           398:     }
        !           399: }
        !           400: 
        !           401: 
        !           402: void EventInitialize()
        !           403: {
        !           404:     grabList = NULL;
        !           405:     DestroyList = NULL;
        !           406:     InitializeHash();
        !           407: }

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