[xemacs-hg @ 2001-06-10 10:42:16 by ben] ------ signal-code changes ------ data.c, device-tty.c, emacs.c, floatfns.c, linuxplay.c, nas.c, process-unix.c, signal.c, sunplay.c, sysdep.c, syssignal.h: use EMACS_SIGNAL everywhere instead of playing preprocessing games with signal(). s\windowsnt.h, s\mingw32.h, syssignal.h: Remove mswindows signal code from s+m headers and move to syssignal.h as one of the five ways of signal handling, instead of playing preprocessing games. fileio.c, sysdep.c: Rename sys_do_signal to qxe_reliable_signal. signal.c, process-unix.c, profile.c: Create set_timeout_signal(); use instead of just EMACS_SIGNAL to establish a signal handler on a timeout signal; this does special things under Cygwin. nt.c: Eliminate term_ntproc(), which is blank; used as a SIGABRT handler, which was wrong anyway. nt.c, win32.c: Move signal code from nt.c to win32.c, since Cygwin needs it too when dealing with timeout signals. s\cygwin32.h: Define CYGWIN_BROKEN_SIGNALS. ------ other changes ------ s\mingw32.h: Fix problems with NOT_C_CODE being in the wrong place and excluding defines needed when building Makefile.in.in. filelock.c, mule-canna.c, mule-ccl.c, mule-ccl.h, ralloc.c, unexalpha.c, unexapollo.c, unexcw.c, unexelfsgi.c, unexnt.c, unexsni.c, s\aix3-1.h, s\bsd4-1.h, s\bsd4-2.h, s\bsd4-3.h, s\cxux.h, s\cygwin32.h, s\dgux.h, s\dgux5-4r2.h, s\dgux5-4r3.h, s\dgux5-4r4.h, s\ewsux5r4.h, s\gnu.h, s\hpux.h, s\iris3-5.h, s\iris3-6.h, s\irix3-3.h, s\linux.h, s\mingw32.h, s\newsos5.h, s\nextstep.h, s\ptx.h, s\riscix1-1.h, s\riscix1-2.h, s\rtu.h, s\sco4.h, s\sco5.h, s\template.h, s\ultrix.h, s\umax.h, s\umips.h, s\unipl5-0.h, s\unipl5-2.h, s\usg5-0.h, s\usg5-2-2.h, s\usg5-2.h, s\usg5-3.h, s\usg5-4.h, s\windowsnt.h, s\xenix.h: Rename 'GNU Emacs' to XEmacs in the copyright and comments. nas.c: Stylistic cleanup. Avoid preprocessing games with names such as play_sound_file. ------ signal-code changes ------ data.c, device-tty.c, emacs.c, floatfns.c, linuxplay.c, nas.c, process-unix.c, signal.c, sunplay.c, sysdep.c, syssignal.h: use EMACS_SIGNAL everywhere instead of playing preprocessing games with signal(). s\windowsnt.h, s\mingw32.h, syssignal.h: Remove mswindows signal code from s+m headers and move to syssignal.h as one of the five ways of signal handling, instead of playing preprocessing games. fileio.c, sysdep.c: Rename sys_do_signal to qxe_reliable_signal. signal.c, process-unix.c, profile.c: Create set_timeout_signal(); use instead of just EMACS_SIGNAL to establish a signal handler on a timeout signal; this does special things under Cygwin. nt.c: Eliminate term_ntproc(), which is blank; used as a SIGABRT handler, which was wrong anyway. nt.c, win32.c: Move signal code from nt.c to win32.c, since Cygwin needs it too when dealing with timeout signals. s\cygwin32.h: Define CYGWIN_BROKEN_SIGNALS. ------ other changes ------ s\mingw32.h: Fix problems with NOT_C_CODE being in the wrong place and excluding defines needed when building Makefile.in.in. filelock.c, mule-canna.c, mule-ccl.c, mule-ccl.h, ralloc.c, unexalpha.c, unexapollo.c, unexcw.c, unexelfsgi.c, unexnt.c, unexsni.c, s\aix3-1.h, s\bsd4-1.h, s\bsd4-2.h, s\bsd4-3.h, s\cxux.h, s\cygwin32.h, s\dgux.h, s\dgux5-4r2.h, s\dgux5-4r3.h, s\dgux5-4r4.h, s\ewsux5r4.h, s\gnu.h, s\hpux.h, s\iris3-5.h, s\iris3-6.h, s\irix3-3.h, s\linux.h, s\mingw32.h, s\newsos5.h, s\nextstep.h, s\ptx.h, s\riscix1-1.h, s\riscix1-2.h, s\rtu.h, s\sco4.h, s\sco5.h, s\template.h, s\ultrix.h, s\umax.h, s\umips.h, s\unipl5-0.h, s\unipl5-2.h, s\usg5-0.h, s\usg5-2-2.h, s\usg5-2.h, s\usg5-3.h, s\usg5-4.h, s\windowsnt.h, s\xenix.h: Rename 'GNU Emacs' to XEmacs in the copyright and comments. nas.c: Stylistic cleanup. Avoid preprocessing games with names such as play_sound_file. xemacs-faq.texi: Update sections on Windows and MacOS availability. alist.el, apropos.el, autoload.el, bytecomp.el, cl-compat.el, cl-extra.el, cl-macs.el, cl-seq.el, cl.el, cmdloop.el, cus-edit.el, derived.el, gpm.el, itimer.el, lisp-mode.el, shadow.el, version.el, wid-browse.el: Rename 'GNU Emacs' to XEmacs in the copyright. Fix other references to GNU Emacs that should be XEmacs or just Emacs. files.el: Fix warning. simple.el: transpose-line-up/down will now move the region up or down by a line if active. cvtmail.c, fakemail.c, gnuserv.c, gnuserv.h, gnuslib.c, make-msgfile.c, make-path.c, pop.c, pop.h, profile.c, tcp.c: Rename 'GNU Emacs' to XEmacs in the copyright. Fix comments in similar ways. digest-doc.c, sorted-doc.c: Fix program and author name to reflect XEmacs.

/* External client, raw Xlib version.
   Copyright (C) 1993, 1994 Sun Microsystems, Inc.

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.

This library 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
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with this library; if not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */

/* Synched up with: Not in FSF. */

/* Written by Ben Wing, February 1994. */

#include <X11/Xlib.h>
#include <X11/Xresource.h>
#include <X11/Xutil.h>
#include "extw-Xlib.h"

/* this is not a perfect solution, but otherwise we have to include all
   of the Xt junk */

#define XtGeometryNo 1

#if (XlibSpecificationRelease < 5)
# define XPointer char *
#endif

static int context_inited;
static XContext focus_context;

/* does the specified window have the focus, given that the pointer just
   entered (or left) the window (according to enter_p)?  This question
   does not have an obvious answer in X.  (Basically, X sucks.) */

static int
window_has_focus_p (Display *display, Window win, int enter_p)
{
  Window focuswin;
  int dummy;

  XGetInputFocus(display, &focuswin, &dummy);
  if (focuswin == PointerRoot)
    return enter_p;
  if (focuswin == win)
    return True;
  if (!enter_p)
    return False;
  do
    {
      Status st;
      Window root_win, parent_win;
      Window *child_win;
      int nchild;

      st = XQueryTree(display, win, &root_win, &parent_win, &child_win,
		      &nchild);
      if (!st)
	return False;
      XFree((XPointer)child_win);
      if (parent_win == focuswin)
	return True;
      if (parent_win == root_win)
	return False;
      win = parent_win;
    }
  while (1);
}

  
/* External entry points when using XLib directly */

void ExternalClientInitialize (Display *display, Window win);
void
ExternalClientInitialize (Display *display, Window win)
{
  extw_initialize_atoms(display);
  extw_which_side = extw_client_send;
  if (!context_inited)
    {
      focus_context = XUniqueContext();
      context_inited = 1;
    }
  XSaveContext(display, win, focus_context, 0);
  XSelectInput(display, win, EnterWindowMask | LeaveWindowMask |
	       FocusChangeMask);
}

void ExternalClientEventHandler (Display *display, Window win, XEvent *event);
void
ExternalClientEventHandler (Display *display, Window win, XEvent *event)
{
  if (win != event->xany.window)
    return;
  
  if (event->type == ClientMessage &&
      event->xclient.message_type == a_EXTW_NOTIFY &&
      event->xclient.data.l[0] == extw_shell_send)
    switch (event->xclient.data.l[1]) {
    case extw_notify_gm:
      /* for the moment, just refuse geometry requests. */
      extw_send_notify_3(display, win, extw_notify_gm, XtGeometryNo, 0, 0);
      break;
      
    case extw_notify_init:
      extw_send_notify_3(display, win, extw_notify_init, EXTW_TYPE_XLIB, 0, 0);
      break;
      
    case extw_notify_end:
      XClearArea(display, win, 0, 0, 0, 0, True);
      break;
    }
  else
    {
      int focus_status;
      XPointer current_focus;

      if (event->type == FocusIn)
	focus_status = 1;
      else if (event->type == FocusOut)
	focus_status = 0;
      else if (event->type == EnterNotify &&
	       event->xcrossing.detail != NotifyInferior)
	focus_status = window_has_focus_p(display, win, 1);
      else if (event->type == LeaveNotify &&
	       event->xcrossing.detail != NotifyInferior)
	focus_status = window_has_focus_p(display, win, 0);
      else
	return;
      XFindContext(display, win, focus_context, &current_focus);
      if (focus_status != (int) current_focus)
	{
	  XSaveContext(display, win, focus_context, (XPointer) focus_status);
	  extw_send_notify_3(display, win, focus_status ?
			     extw_notify_focus_in : extw_notify_focus_out,
			     0, 0, 0);
	}
    }
}