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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 event_loop(void);
-
- static VALUE
- handle_event(XEvent *xev)
- {
- VW *oldvw = curr_vw, *ev_vw;
- VALUE result = sym_nil;
- /* std_message(curr_vw); */
- ev_vw = x11_find_window_view(xev->xany.window);
- if(ev_vw)
- {
- switch(xev->type)
- {
- u_long code, mods;
- case MappingNotify:
- XRefreshKeyboardMapping(&xev->xmapping);
- break;
- case Expose:
- if(ev_vw->vw_Flags & VWFF_SLEEPING)
- {
- /* Guess that the wm uniconified us? */
- ev_vw->vw_Flags &= ~VWFF_SLEEPING;
- }
- if(ev_vw->vw_Flags & VWFF_FORCE_REFRESH)
- {
- /* Wait until the last Expose then do a total redraw. */
- if(xev->xexpose.count == 0)
- {
- draw_message_line(ev_vw);
- ev_vw->vw_Flags |= VWFF_REFRESH_STATUS;
- refresh_window(ev_vw);
- }
- }
- else
- x11_handle_expose(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_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;
- x11_update_dimensions(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] == x11_wm_del_win))
- {
- curr_vw = ev_vw;
- if(ev_vw != oldvw)
- {
- /* Window switch */
- undo_distinct();
- cursor(oldvw, CURS_OFF);
- }
- else
- cursor(ev_vw, CURS_OFF);
- result = cmd_eval_hook2(MKSTR("window-closed-hook"), sym_nil);
- if(curr_vw)
- {
- refresh_world();
- cursor(curr_vw, CURS_ON);
- }
- }
- break;
- case FocusIn:
- if(ev_vw != oldvw)
- {
- cursor(oldvw, CURS_OFF);
- cursor(ev_vw, CURS_ON);
- curr_vw = ev_vw;
- undo_distinct();
- }
- break;
- case ButtonPress:
- case ButtonRelease:
- case KeyPress:
- code = mods = 0;
- translate_event(&code, &mods, xev);
- if(mods & EV_TYPE_MASK)
- {
- curr_vw = ev_vw;
- if(oldvw != ev_vw)
- {
- cursor(oldvw, CURS_OFF);
- undo_distinct();
- }
- result = usekey(xev, code, mods, (ev_vw == oldvw));
- }
- break;
- }
- }
- return(result);
- }
-
- VALUE
- event_loop(void)
- {
- VALUE result = sym_nil;
- recurse_depth++;
- std_message(curr_vw);
- refresh_world_curs();
- while(curr_vw)
- {
- #ifdef HAVE_UNIX
- fd_set copy;
- struct timeval timeout;
- int number, i;
- bool refreshp;
- #endif
- /*
- * HERE... Read out all events in Q
- */
- while(INT_P || XEventsQueued(x11_display, QueuedAfterReading) > 0)
- {
- if(INT_P)
- result = NULL;
- else
- {
- XEvent ev;
- XNextEvent(x11_display, &ev);
- result = handle_event(&ev);
- }
- if(!result)
- {
- if(throw_value)
- {
- VALUE tv = throw_value;
- VALUE car = VCAR(tv);
- throw_value = NULL;
- if(car == sym_exit)
- {
- result = VCDR(tv);
- if(recurse_depth > 0)
- goto end;
- }
- else if((car == sym_top_level) && (recurse_depth == 0))
- result = VCDR(tv);
- else if(car == sym_quit)
- goto end;
- else if(car == sym_user_interrupt)
- {
- handle_error(car, sym_nil);
- result = sym_nil;
- }
- else if(car == sym_error)
- {
- handle_error(VCAR(VCDR(tv)), VCDR(VCDR(tv)));
- result = sym_nil;
- }
- else if(recurse_depth == 0)
- {
- result = sym_nil;
- handle_error(sym_no_catcher, LIST_1(car));
- }
- else
- {
- throw_value = tv;
- goto end;
- }
- }
- else
- result = sym_nil;
- }
- if(!curr_vw)
- goto end;
- #if 0
- std_message(curr_vw);
- if(curr_vw->vw_Flags & VWFF_REFRESH_STATUS)
- {
- refresh_message(curr_vw);
- curr_vw->vw_Flags &= ~VWFF_REFRESH_STATUS;
- }
- #endif
- }
-
- # ifdef HAVE_SUBPROCESSES
- if(proc_notification())
- {
- std_message(curr_vw);
- refresh_world_curs();
- }
- # endif
-
- XFlush(x11_display);
-
- #ifdef HAVE_UNIX
- copy = x11_fd_read_set;
- timeout.tv_sec = EVENT_TIMEOUT_LENGTH;
- timeout.tv_usec = 0;
- /* Don't want select() to restart after a SIGCHLD; there may be
- a notification to dispatch. */
- # ifdef HAVE_SUBPROCESSES
- sigchld_restart(FALSE);
- # endif
- number = select(FD_SETSIZE, ©, NULL, NULL, &timeout);
- # ifdef HAVE_SUBPROCESSES
- sigchld_restart(TRUE);
- # endif
- refreshp = FALSE;
- if(number > 0)
- {
- /*
- * no need to test first 3 descriptors
- */
- i = 3;
- while(number > 0)
- {
- if(FD_ISSET(i, ©))
- {
- number--;
- if(x11_fd_read_action[i])
- {
- x11_fd_read_action[i](i);
- refreshp = TRUE;
- }
- }
- i++;
- }
- }
- else if(number == 0)
- {
- /* A timeout; do one of:
- Print the current key-prefix
- Auto-save a buffer
- GC if enough data allocated
- Run the `idle-hook' */
- if(print_event_prefix() || auto_save_buffers())
- refreshp = TRUE;
- else if(data_after_gc > idle_gc_threshold)
- {
- /* nothing was saved so try a GC */
- cmd_garbage_collect(sym_t);
- }
- else
- {
- VALUE hook = cmd_symbol_value(sym_idle_hook, sym_t);
- if(!VOIDP(hook) && !NILP(hook))
- {
- cmd_eval_hook2(sym_idle_hook, sym_nil);
- refreshp = TRUE;
- }
- }
- }
- #else
- whatever you like...
- #endif /* HAVE_UNIX */
-
- if(refreshp)
- {
- std_message(curr_vw);
- refresh_world_curs();
- }
- }
- end:
- recurse_depth--;
- return(result);
- }
-