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- /* x11_eventloop.c -- Eventloop for X11
- Copyright (C) 1993, 1994 John Harper <jsh@ukc.ac.uk>
-
- This file is part of Jade.
-
- Jade is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- Jade is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Jade; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include "jade.h"
- #include "jade_protos.h"
-
- #ifdef HAVE_UNIX
- # include <sys/types.h>
- # include <sys/time.h>
- # include <errno.h>
- #else
- you lose
- #endif
-
- _PR VALUE eventloop(void);
-
- static VALUE
- handleevent(XEvent *xev)
- {
- VW *oldvw = CurrVW, *ev_vw;
- VALUE result = sym_nil;
- /* stdtitle(CurrVW); */
- ev_vw = findwindowvw(xev->xany.window);
- if(ev_vw)
- {
- switch(xev->type)
- {
- Event ev;
- case MappingNotify:
- XRefreshKeyboardMapping(&xev->xmapping);
- break;
- case Expose:
- handleexpose(ev_vw, &xev->xexpose);
- if(ev_vw == oldvw)
- cursor(ev_vw, CURS_ON);
- break;
- case ConfigureNotify:
- if((ev_vw->vw_WindowSys.ws_Width != xev->xconfigure.width)
- || (ev_vw->vw_WindowSys.ws_Height != xev->xconfigure.height))
- {
- if(ev_vw == oldvw)
- cursor(ev_vw, CURS_OFF);
- if((ev_vw->vw_WindowSys.ws_Height != 0)
- && (ev_vw->vw_WindowSys.ws_Height < xev->xconfigure.height))
- {
- /* Have to clear out the status line. It can be left in
- the wrong place. */
- CLR_AREA(ev_vw, 0, ev_vw->vw_WindowSys.ws_MessageLineY,
- ev_vw->vw_WindowSys.ws_Width, ev_vw->vw_FontY+2);
- }
- ev_vw->vw_WindowSys.ws_Width = xev->xconfigure.width;
- ev_vw->vw_WindowSys.ws_Height = xev->xconfigure.height;
- _updatedimensions(ev_vw, xev->xconfigure.width, xev->xconfigure.height);
- if(ev_vw == oldvw)
- cursor(ev_vw, CURS_ON);
- }
- break;
- case ClientMessage:
- if((xev->xclient.format == 32)
- && (xev->xclient.data.l[0] == Wm_Del_Win))
- {
- CurrVW = ev_vw;
- if(ev_vw != oldvw)
- cursor(oldvw, CURS_OFF);
- else
- cursor(ev_vw, CURS_OFF);
- result = cmd_eval_hook2(MKSTR("close-gadget-hook"), sym_nil);
- if(CurrVW)
- {
- refreshworld();
- cursor(CurrVW, CURS_ON);
- }
- }
- break;
- case FocusIn:
- if(ev_vw != oldvw)
- {
- cursor(oldvw, CURS_OFF);
- cursor(ev_vw, CURS_ON);
- CurrVW = ev_vw;
- }
- break;
- case ButtonPress:
- case ButtonRelease:
- case KeyPress:
- ev.ev_EventDef.evd_Type = ev.ev_EventDef.evd_Mods = ev.ev_EventDef.evd_Code = 0;
- translateevent(&ev, xev);
- if(ev.ev_EventDef.evd_Type)
- {
- CurrVW = ev_vw;
- if(oldvw != ev_vw)
- cursor(oldvw, CURS_OFF);
- ev.ev_Window = ev_vw;
- result = usekey(xev, &ev, (ev_vw == oldvw));
- }
- break;
- }
- }
- return(result);
- }
-
- VALUE
- eventloop(void)
- {
- VALUE result = sym_nil;
- RecurseDepth++;
- refreshworldcurs();
- while(CurrVW)
- {
- #ifdef HAVE_UNIX
- fd_set copy;
- struct timeval timeout;
- int number, i;
- #endif
- /*
- * HERE... Read out all events in Q
- */
- while(XEventsQueued(XDisplay, QueuedAfterReading) > 0)
- {
- XEvent ev;
- XNextEvent(XDisplay, &ev);
- if(!(result = handleevent(&ev)))
- {
- if(ThrowValue)
- {
- VALUE car = VCAR(ThrowValue);
- if(car == sym_exit)
- {
- result = VCDR(ThrowValue);
- ThrowValue = NULL;
- if(RecurseDepth > 0)
- goto end;
- }
- else if((car == sym_top_level) && (RecurseDepth == 0))
- {
- result = VCDR(ThrowValue);
- ThrowValue = NULL;
- }
- else if(car == sym_quit)
- goto end;
- else if(car == sym_error)
- {
- handleerror(VCAR(VCDR(ThrowValue)), VCDR(VCDR(ThrowValue)));
- ThrowValue = NULL;
- result = sym_nil;
- }
- else if(RecurseDepth == 0)
- {
- ThrowValue = NULL;
- result = sym_nil;
- #if 0
- /* This is no good -- we have to do the error NOW */
- cmd_signal(sym_no_catcher, LIST_1(car));
- #else
- handleerror(sym_no_catcher, LIST_1(car));
- #endif
- }
- else
- goto end;
- }
- else
- {
- result = sym_nil;
- ThrowValue = NULL;
- }
- }
- if(!CurrVW)
- goto end;
- stdtitle(CurrVW);
- if(CurrVW->vw_Flags & VWFF_REFRESH_STATUS)
- {
- setvwtitle(CurrVW);
- CurrVW->vw_Flags &= ~VWFF_REFRESH_STATUS;
- }
- }
- XFlush(XDisplay);
-
- #ifdef HAVE_UNIX
- copy = FdReadSet;
- timeout.tv_sec = EVENT_TIMEOUT_LENGTH;
- timeout.tv_usec = 0;
- number = select(FD_SETSIZE, ©, NULL, NULL, &timeout);
- if(number > 0)
- {
- /*
- * no need to test first 3 descriptors
- */
- i = 3;
- while(number > 0)
- {
- if(FD_ISSET(i, ©))
- {
- number--;
- if(FdReadAction[i])
- FdReadAction[i](i);
- }
- i++;
- }
- }
- else if(number == 0)
- {
- /*
- * auto-save's are only done after the select() timeout.
- * This is for two reasons:
- * 1. save wasting lots of cpu-time
- * 2. minimises inconvenience of waiting for buffer(s) to be
- * saved while typing (ie, it should rarely happen).
- *
- * I'm not sure how long to make the timeout??
- */
- if(!autosavebuffers())
- {
- /* nothing was saved so try a GC */
- if(DataAfterGC > IdleDataBeforeGC)
- cmd_garbage_collect(sym_t);
- }
- }
- #else
- whatever you like...
- #endif /* HAVE_UNIX */
- /*
- * This is only needed in case some process wrote to a buffer
- */
- refreshworldcurs();
- }
- end:
- RecurseDepth--;
- return(result);
- }
-