xemacs-beta: src/event-Xt.c comparison

comparison src/event-Xt.c @ 0:376386a54a3c r19-14

Import from CVS: tag r19-14

author	cvs
date	Mon, 13 Aug 2007 08:45:50 +0200
parents
children	ac2d302a0011

comparison

equal deleted inserted replaced

--1:000000000000
+:376386a54a3c
+/* The event_stream interface for X11 with Xt, and/or tty frames.
+Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+Copyright (C) 1995 Sun Microsystems, Inc.
+Copyright (C) 1996 Ben Wing.
+This file is part of XEmacs.
+XEmacs 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.
+XEmacs 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 XEmacs; see the file COPYING.  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. */
+#include <config.h>
+#include "lisp.h"
+#include "console-x.h"
+#include "lwlib.h"
+#include "EmacsFrame.h"
+#include "blocktype.h"
+#include "buffer.h"
+#include "commands.h"
+#include "console.h"
+#include "console-tty.h"
+#include "events.h"
+#include "frame.h"
+#include "objects-x.h"
+#include "process.h"
+#include "redisplay.h"
+#include "systime.h"
+#include "sysproc.h" /* for MAXDESC */
+#include "xintrinsicp.h"	/* CoreP.h needs this */
+#include <X11/CoreP.h>		/* Numerous places access the fields of
+				   a core widget directly.  We could
+				   use XtVaGetValues(), but ... */
+static struct event_stream *Xt_event_stream;
+/* With the new event model, all events go through XtDispatchEvent()
+and are picked up by an event handler that is added to each frame
+widget. (This is how it's supposed to be.) In the old method,
+Emacs sucks out events directly from XtNextEvent() and only
+dispatches the events that it doesn't need to deal with.  This
+old way has lots of corresponding junk that is no longer
+necessary: lwlib extensions, synthetic XAnyEvents, unnecessary
+magic events, etc. */
+/* The one and only one application context that Emacs uses. */
+XtAppContext Xt_app_con;
+/* Do we accept events sent by other clients? */
+int x_allow_sendevents;
+int modifier_keys_are_sticky;
+#ifdef DEBUG_XEMACS
+int x_debug_events;
+#endif
+static int process_events_occurred;
+static int tty_events_occurred;
+/* Mask of bits indicating the descriptors that we wait for input on */
+extern SELECT_TYPE input_wait_mask, process_only_mask, tty_only_mask;
+static CONST String x_fallback_resources[] =
+{
+/* This file is automatically generated from the app-defaults file
+in ../etc/Emacs.ad.  These resources are consulted only if no
+app-defaults file is found at all.
+*/
+#include "Emacs.ad.h"
+0
+};
+void emacs_Xt_mapping_action (Widget w, XEvent *event);
+void debug_process_finalization (struct Lisp_Process *p);
+Lisp_Object dequeue_Xt_dispatch_event (void);
+void emacs_Xt_event_handler (Widget wid, XtPointer closure, XEvent *event,
+			     Boolean *continue_to_dispatch);
+#ifdef EPOCH
+void dispatch_epoch_event (struct frame *f, XEvent *event, Lisp_Object type);
+#endif
+static int last_quit_check_signal_tick_count;
+Lisp_Object Qkey_mapping;
+/************************************************************************/
+/*                            keymap handling                           */
+/************************************************************************/
+/* X bogusly doesn't define the interpretations of any bits besides
+ModControl, ModShift, and ModLock; so the Interclient Communication
+Conventions Manual says that we have to bend over backwards to figure
+out what the other modifier bits mean.  According to ICCCM:
+- Any keycode which is assigned ModControl is a "control" key.
+- Any modifier bit which is assigned to a keycode which generates Meta_L
+or Meta_R is the modifier bit meaning "meta".  Likewise for Super, Hyper,
+etc.
+- Any keypress event which contains ModControl in its state should be
+interpreted as a "control" character.
+- Any keypress event which contains a modifier bit in its state which is
+generated by a keycode whose corresponding keysym is Meta_L or Meta_R
+should be interpreted as a "meta" character.  Likewise for Super, Hyper,
+etc.
+- It is illegal for a keysym to be associated with more than one modifier
+bit.
+This means that the only thing that emacs can reasonably interpret as a
+"meta" key is a key whose keysym is Meta_L or Meta_R, and which generates
+one of the modifier bits Mod1-Mod5.
+Unfortunately, many keyboards don't have Meta keys in their default
+configuration.  So, if there are no Meta keys, but there are "Alt" keys,
+emacs will interpret Alt as Meta.  If there are both Meta and Alt keys,
+then the Meta keys mean "Meta", and the Alt keys mean "Alt" (it used to
+mean "Symbol," but that just confused the hell out of way too many people).
+This works with the default configurations of the 19 keyboard-types I've
+checked.
+Emacs detects keyboard configurations which violate the above rules, and
+prints an error message on the standard-error-output.  (Perhaps it should
+use a pop-up-window instead.)
+*/
+static void
+x_reset_key_mapping (struct device *d)
+{
+Display *display = DEVICE_X_DISPLAY (d);
+struct x_device *xd = DEVICE_X_DATA (d);
+int max_code;
+if (xd->x_keysym_map)
+XFree ((char *) xd->x_keysym_map);
+XDisplayKeycodes (display, &xd->x_keysym_map_min_code,
+		    &max_code);
+xd->x_keysym_map =
+XGetKeyboardMapping (display, xd->x_keysym_map_min_code,
+			 max_code - xd->x_keysym_map_min_code + 1,
+			 &xd->x_keysym_map_keysyms_per_code);
+}
+static CONST char *
+index_to_name (int indice)
+{
+return ((indice == ShiftMapIndex ? "ModShift"
+: (indice == LockMapIndex ? "ModLock"
+: (indice == ControlMapIndex ? "ModControl"
+: (indice == Mod1MapIndex ? "Mod1"
+: (indice == Mod2MapIndex ? "Mod2"
+: (indice == Mod3MapIndex ? "Mod3"
+: (indice == Mod4MapIndex ? "Mod4"
+: (indice == Mod5MapIndex ? "Mod5"
+: "???")))))))));
+}
+/* Boy, I really wish C had local functions... */
+struct c_doesnt_have_closures   /* #### not yet used */
+{
+int warned_about_overlapping_modifiers;
+int warned_about_predefined_modifiers;
+int warned_about_duplicate_modifiers;
+int meta_bit;
+int hyper_bit;
+int super_bit;
+int alt_bit;
+int mode_bit;
+};
+static void
+x_reset_modifier_mapping (struct device *d)
+{
+Display *display = DEVICE_X_DISPLAY (d);
+struct x_device *xd = DEVICE_X_DATA (d);
+int modifier_index, modifier_key, column, mkpm;
+int warned_about_overlapping_modifiers = 0;
+int warned_about_predefined_modifiers = 0;
+int warned_about_duplicate_modifiers = 0;
+int meta_bit = 0;
+int hyper_bit = 0;
+int super_bit = 0;
+int alt_bit = 0;
+int mode_bit = 0;
+xd->lock_interpretation = 0;
+if (xd->x_modifier_keymap)
+XFreeModifiermap (xd->x_modifier_keymap);
+x_reset_key_mapping (d);
+xd->x_modifier_keymap = XGetModifierMapping (display);
+/* Boy, I really wish C had local functions...
+*/
+/* The call to warn_when_safe must be on the same line as the string or
+make-msgfile won't pick it up properly (the newline doesn't confuse
+it, but the backslash does). */
+#define modwarn(name,old,other)						\
+warn_when_safe (Qkey_mapping, Qwarning, "XEmacs:  %s (0x%x) generates %s, which is generated by %s.",	\
+		  name, code, index_to_name (old), other),		\
+warned_about_overlapping_modifiers = 1
+#define modbarf(name,other)						    \
+warn_when_safe (Qkey_mapping, Qwarning, "XEmacs:  %s (0x%x) generates %s, which is nonsensical.", \
+		  name, code, other),					    \
+warned_about_predefined_modifiers = 1
+#define check_modifier(name,mask)					      \
+if ((1<<modifier_index) != mask)					      \
+warn_when_safe (Qkey_mapping, Qwarning, "XEmacs:  %s (0x%x) generates %s, which is nonsensical.", \
+		    name, code, index_to_name (modifier_index)),	      \
+warned_about_predefined_modifiers = 1
+#define store_modifier(name,old)					   \
+if (old && old != modifier_index)					   \
+warn_when_safe (Qkey_mapping, Qwarning, "XEmacs:  %s (0x%x) generates both %s and %s, which is nonsensical.",\
+		    name, code, index_to_name (old),			   \
+		    index_to_name (modifier_index)),			   \
+warned_about_duplicate_modifiers = 1;				   \
+if (modifier_index == ShiftMapIndex) modbarf (name,"ModShift");	   \
+else if (modifier_index == LockMapIndex) modbarf (name,"ModLock");	   \
+else if (modifier_index == ControlMapIndex) modbarf (name,"ModControl"); \
+else if (sym == XK_Mode_switch)					   \
+mode_bit = modifier_index; /* Mode_switch is special, see below... */  \
+else if (modifier_index == meta_bit && old != meta_bit)		   \
+modwarn (name, meta_bit, "Meta");					   \
+else if (modifier_index == super_bit && old != super_bit)		   \
+modwarn (name, super_bit, "Super");					   \
+else if (modifier_index == hyper_bit && old != hyper_bit)		   \
+modwarn (name, hyper_bit, "Hyper");					   \
+else if (modifier_index == alt_bit && old != alt_bit)			   \
+modwarn (name, alt_bit, "Alt");					   \
+else									   \
+old = modifier_index;
+mkpm = xd->x_modifier_keymap->max_keypermod;
+for (modifier_index = 0; modifier_index < 8; modifier_index++)
+for (modifier_key = 0; modifier_key < mkpm; modifier_key++) {
+KeySym last_sym = 0;
+for (column = 0; column < 4; column += 2) {
+	KeyCode code = xd->x_modifier_keymap->modifiermap[modifier_index * mkpm
+							  + modifier_key];
+	KeySym sym = (code ? XKeycodeToKeysym (display, code, column) : 0);
+	if (sym == last_sym) continue;
+	last_sym = sym;
+	switch (sym) {
+	case XK_Mode_switch:store_modifier ("Mode_switch", mode_bit); break;
+	case XK_Meta_L:     store_modifier ("Meta_L", meta_bit); break;
+	case XK_Meta_R:     store_modifier ("Meta_R", meta_bit); break;
+	case XK_Super_L:    store_modifier ("Super_L", super_bit); break;
+	case XK_Super_R:    store_modifier ("Super_R", super_bit); break;
+	case XK_Hyper_L:    store_modifier ("Hyper_L", hyper_bit); break;
+	case XK_Hyper_R:    store_modifier ("Hyper_R", hyper_bit); break;
+	case XK_Alt_L:      store_modifier ("Alt_L", alt_bit); break;
+	case XK_Alt_R:      store_modifier ("Alt_R", alt_bit); break;
+	case XK_Control_L:  check_modifier ("Control_L", ControlMask); break;
+	case XK_Control_R:  check_modifier ("Control_R", ControlMask); break;
+	case XK_Shift_L:    check_modifier ("Shift_L", ShiftMask); break;
+	case XK_Shift_R:    check_modifier ("Shift_R", ShiftMask); break;
+	case XK_Shift_Lock: check_modifier ("Shift_Lock", LockMask);
+	  xd->lock_interpretation = XK_Shift_Lock; break;
+	case XK_Caps_Lock:  check_modifier ("Caps_Lock", LockMask);
+	  xd->lock_interpretation = XK_Caps_Lock; break;
+	/* It probably doesn't make any sense for a modifier bit to be
+	   assigned to a key that is not one of the above, but OpenWindows
+	   assigns modifier bits to a couple of random function keys for
+	   no reason that I can discern, so printing a warning here would
+	   be annoying.
+	 */
+	}
+}
+}
+#undef store_modifier
+#undef check_modifier
+#undef modwarn
+#undef modbarf
+/* If there was no Meta key, then try using the Alt key instead.
+If there is both a Meta key and an Alt key, then the Alt key
+is not disturbed and remains an Alt key.
+*/
+if (! meta_bit && alt_bit)
+meta_bit = alt_bit, alt_bit = 0;
+/* mode_bit overrides everything, since it's processed down inside of
+XLookupString() instead of by us.  If Meta and Mode_switch both
+generate the same modifier bit (which is an error), then we don't
+interpret that bit as Meta, because we can't make XLookupString()
+not interpret it as Mode_switch; and interpreting it as both would
+be totally wrong.
+*/
+if (mode_bit)
+{
+CONST char *warn = 0;
+if      (mode_bit == meta_bit)  warn = "Meta",  meta_bit  = 0;
+else if (mode_bit == hyper_bit) warn = "Hyper", hyper_bit = 0;
+else if (mode_bit == super_bit) warn = "Super", super_bit = 0;
+else if (mode_bit == alt_bit)   warn = "Alt",   alt_bit   = 0;
+if (warn)
+	{
+	  warn_when_safe
+	    (Qkey_mapping, Qwarning,
+	     "XEmacs:  %s is being used for both Mode_switch and %s.",
+	     index_to_name (mode_bit), warn),
+	    warned_about_overlapping_modifiers = 1;
+	}
+}
+#undef index_to_name
+xd->MetaMask   = (meta_bit   ? (1 << meta_bit)  : 0);
+xd->HyperMask  = (hyper_bit  ? (1 << hyper_bit) : 0);
+xd->SuperMask  = (super_bit  ? (1 << super_bit) : 0);
+xd->AltMask    = (alt_bit    ? (1 << alt_bit)   : 0);
+xd->ModeMask   = (mode_bit   ? (1 << mode_bit)  : 0); /* unused */
+if (warned_about_overlapping_modifiers)
+warn_when_safe (Qkey_mapping, Qwarning, "\n"
+"	Two distinct modifier keys (such as Meta and Hyper) cannot generate\n"
+"	the same modifier bit, because Emacs won't be able to tell which\n"
+"	modifier was actually held down when some other key is pressed.  It\n"
+"	won't be able to tell Meta-x and Hyper-x apart, for example.  Change\n"
+"	one of these keys to use some other modifier bit.  If you intend for\n"
+"	these keys to have the same behavior, then change them to have the\n"
+"	same keysym as well as the same modifier bit.");
+if (warned_about_predefined_modifiers)
+warn_when_safe (Qkey_mapping, Qwarning, "\n"
+"	The semantics of the modifier bits ModShift, ModLock, and ModControl\n"
+"	are predefined.  It does not make sense to assign ModControl to any\n"
+"	keysym other than Control_L or Control_R, or to assign any modifier\n"
+"	bits to the \"control\" keysyms other than ModControl.  You can't\n"
+"	turn a \"control\" key into a \"meta\" key (or vice versa) by simply\n"
+"	assigning the key a different modifier bit.  You must also make that\n"
+"	key generate an appropriate keysym (Control_L, Meta_L, etc).");
+/* Don\'t need to say anything more for warned_about_duplicate_modifiers. */
+if (warned_about_overlapping_modifiers || warned_about_predefined_modifiers)
+warn_when_safe (Qkey_mapping, Qwarning, "\n"
+"	The meanings of the modifier bits Mod1 through Mod5 are determined\n"
+"	by the keysyms used to control those bits.  Mod1 does NOT always\n"
+"	mean Meta, although some non-ICCCM-compliant programs assume that.");
+}
+void
+x_init_modifier_mapping (struct device *d)
+{
+DEVICE_X_DATA (d)->x_keysym_map = 0;
+DEVICE_X_DATA (d)->x_modifier_keymap = 0;
+x_reset_modifier_mapping (d);
+}
+static int
+x_key_is_modifier_p (KeyCode keycode, struct device *d)
+{
+struct x_device *xd = DEVICE_X_DATA (d);
+KeySym *syms = &xd->x_keysym_map [(keycode - xd->x_keysym_map_min_code) *
+				    xd->x_keysym_map_keysyms_per_code];
+int i;
+for (i = 0; i < xd->x_keysym_map_keysyms_per_code; i++)
+if (IsModifierKey (syms [i]) ||
+	syms [i] == XK_Mode_switch) /* why doesn't IsModifierKey count this? */
+return 1;
+return 0;
+}
+/* key-handling code is always ugly.  It just ends up working out
+that way.
+Here are some pointers:
+-- DOWN_MASK indicates which modifiers should be treated as "down"
+when the corresponding upstroke happens.  It gets reset for
+a particular modifier when that modifier goes up, and reset
+for all modifiers when a non-modifier key is pressed.  Example:
+I press Control-A-Shift and then release Control-A-Shift.
+I want the Shift key to be sticky but not the Control key.
+-- LAST_DOWNKEY and RELEASE_TIME are used to keep track of
+auto-repeat -- see below.
+-- If a modifier key is sticky, I can unstick it by pressing
+the modifier key again. */
+static void
+x_handle_sticky_modifiers (XEvent *ev, struct device *d)
+{
+struct x_device *xd = DEVICE_X_DATA (d);
+KeyCode keycode = ev->xkey.keycode;
+int type = ev->xany.type;
+int is_modifier =
+(type == KeyPress || type == KeyRelease) &&
+x_key_is_modifier_p (keycode, d);
+if (!modifier_keys_are_sticky)
+return;
+if (!is_modifier)
+{
+if (type == KeyPress && !xd->last_downkey)
+	xd->last_downkey = keycode;
+else if (type == ButtonPress ||
+	       (type == KeyPress && xd->last_downkey &&
+		(keycode != xd->last_downkey ||
+		 ev->xkey.time != xd->release_time)))
+	{
+	  xd->need_to_add_mask = 0;
+	  xd->last_downkey = 0;
+	}
+if (type == KeyPress)
+	xd->release_time = 0;
+if (type == KeyPress || type == ButtonPress)
+	xd->down_mask = 0;
+ev->xkey.state |= xd->need_to_add_mask;
+if (type == KeyRelease && keycode == xd->last_downkey)
+	/* If I hold press-and-release the Control key and then press
+	   and hold down the right arrow, I want it to auto-repeat
+	   Control-Right.  On the other hand, if I do the same but
+	   manually press the Right arrow a bunch of times, I want
+	   to see one Control-Right and then a bunch of Rights.
+	   This means that we need to distinguish between an
+	   auto-repeated key and a key pressed and released a bunch
+	   of times.
+	   Naturally, the designers of the X spec didn't see fit
+	   to provide an obvious way to distinguish these cases.
+	   So we assume that if the release and the next press
+	   occur at the same time, the key was actually auto-
+	   repeated.  Under Open-Windows, at least, this works.
+	   */
+	xd->release_time = ev->xkey.time;
+}
+else
+{
+KeySym *syms = &xd->x_keysym_map [(keycode - xd->x_keysym_map_min_code) *
+					xd->x_keysym_map_keysyms_per_code];
+int i;
+#define FROB(mask)				\
+do {						\
+if (type == KeyPress)				\
+{						\
+/* If modifier key is already sticky,	\
+then unstick it.  Note that we do	\
+not test down_mask to deal with the	\
+	 unlikely but possible case that the	\
+	 modifier key auto-repeats. */		\
+if (xd->need_to_add_mask & mask)		\
+	{					\
+	  xd->need_to_add_mask &= ~mask;	\
+	  xd->down_mask &= ~mask;		\
+	}					\
+else					\
+	xd->down_mask |= mask;			\
+}						\
+else						\
+{						\
+if (xd->down_mask & mask)			\
+	{					\
+	  xd->down_mask &= ~mask;		\
+	  xd->need_to_add_mask |= mask;		\
+	}					\
+}						\
+} while (0)
+/* If a non-modifier key was pressed in the middle of a bunch
+	 of modifiers, then it unsticks all the modifiers that were
+	 previously pressed.  We cannot unstick the modifiers until
+	 now because we want to check for auto-repeat of the
+	 non-modifier key. */
+if (xd->last_downkey)
+	{
+	  xd->last_downkey = 0;
+	  xd->need_to_add_mask = 0;
+	}
+for (i = 0; i < xd->x_keysym_map_keysyms_per_code; i++)
+	{
+	  if (syms[i] == XK_Control_L || syms[i] == XK_Control_R)
+	    FROB (ControlMask);
+	  if (syms[i] == XK_Shift_L || syms[i] == XK_Shift_R)
+	    FROB (ShiftMask);
+	  if (syms[i] == XK_Meta_L || syms[i] == XK_Meta_R)
+	    FROB (xd->MetaMask);
+	  if (syms[i] == XK_Super_L || syms[i] == XK_Super_R)
+	    FROB (xd->SuperMask);
+	  if (syms[i] == XK_Hyper_L || syms[i] == XK_Hyper_R)
+	    FROB (xd->HyperMask);
+	  if (syms[i] == XK_Alt_L || syms[i] == XK_Alt_R)
+	    FROB (xd->AltMask);
+	}
+}
+#undef FROB
+}
+static void
+clear_sticky_modifiers (struct device *d)
+{
+struct x_device *xd = DEVICE_X_DATA (d);
+xd->need_to_add_mask = 0;
+xd->last_downkey = 0;
+xd->release_time = 0;
+xd->down_mask = 0;
+}
+static int
+keysym_obeys_caps_lock_p (KeySym sym, struct device *d)
+{
+struct x_device *xd = DEVICE_X_DATA (d);
+/* Eeeeevil hack.  Don't apply caps-lock to things that aren't alphabetic
+characters, where "alphabetic" means something more than simply A-Z.
+That is, if caps-lock is down, typing ESC doesn't produce Shift-ESC.
+But if shift-lock is down, then it does.
+*/
+if (xd->lock_interpretation == XK_Shift_Lock)
+return 1;
+if (((sym >= XK_A) && (sym <= XK_Z)) ||
+((sym >= XK_a) && (sym <= XK_z)) ||
+((sym >= XK_Agrave) && (sym <= XK_Odiaeresis)) ||
+((sym >= XK_agrave) && (sym <= XK_odiaeresis)) ||
+((sym >= XK_Ooblique) && (sym <= XK_Thorn)) ||
+((sym >= XK_oslash) && (sym <= XK_thorn)))
+return 1;
+else
+return 0;
+}
+/* called from EmacsFrame.c (actually from Xt itself) when a
+MappingNotify event is received.  For non-obvious reasons,
+our event handler does not see these events, so we need a
+special translation. */
+void
+emacs_Xt_mapping_action (Widget w, XEvent* event)
+{
+struct device *d = get_device_from_display (event->xany.display);
+#if 0
+/* nyet.  Now this is handled by Xt. */
+XRefreshKeyboardMapping (&event->xmapping);
+#endif
+/* xmodmap generates about a billion MappingKeyboard events, followed
+by a single MappingModifier event, so it might be worthwhile to
+take extra MappingKeyboard events out of the queue before requesting
+the current keymap from the server.
+*/
+if (event->xmapping.request == MappingKeyboard)
+x_reset_key_mapping (d);
+else if (event->xmapping.request == MappingModifier)
+x_reset_modifier_mapping (d);
+}
+/************************************************************************/
+/*                  X to Emacs event conversion                         */
+/************************************************************************/
+#if (defined(sun) || defined(__sun)) && defined(__GNUC__)
+# define SUNOS_GCC_L0_BUG
+#endif
+#ifdef SUNOS_GCC_L0_BUG
+static void
+x_to_emacs_keysym_sunos_bug (Lisp_Object *return_value_sunos_bug, /* #### */
+XEvent *event, int simple_p)
+#else /* !SUNOS_GCC_L0_BUG */
+static Lisp_Object
+x_to_emacs_keysym (XEvent *event, int simple_p)
+#endif /* !SUNOS_GCC_L0_BUG */
+/* simple_p means don't try too hard (ASCII only) */
+{
+char *name;
+KeySym keysym = 0;
+struct device *d = get_device_from_display (event->xany.display);
+/* Apparently it's necessary to specify a dummy here (rather than
+passing in 0) to avoid crashes on German IRIX */
+char dummy[256];
+#ifdef SUNOS_GCC_L0_BUG
+# define return(lose) \
+do {*return_value_sunos_bug = (lose); goto return_it; } while (0)
+#endif
+/* ### FIX this by replacing with calls to XmbLookupString.
+XLookupString should never be called. --mrb */
+XLookupString (&event->xkey, dummy, 200, &keysym, 0);
+/* &DEVICE_X_X_COMPOSE_STATUS (d)); */
+if (keysym >= XK_exclam && keysym <= XK_asciitilde)
+/* We must assume that the X keysym numbers for the ASCII graphic
+characters are the same as their ASCII codes.  */
+return (make_char (keysym));
+switch (keysym)
+{
+/* These would be handled correctly by the default case, but by
+	 special-casing them here we don't garbage a string or call intern().
+	 */
+case XK_BackSpace:	return (QKbackspace);
+case XK_Tab:	return (QKtab);
+case XK_Linefeed:	return (QKlinefeed);
+case XK_Return:	return (QKreturn);
+case XK_Escape:	return (QKescape);
+case XK_space:	return (QKspace);
+case XK_Delete:	return (QKdelete);
+case 0:		return (Qnil);
+/* This kludge prevents bogus Xlib compose conversions.
+Don't ask why. The following case must be removed when we
+switch to using XmbLookupString */
+case XK_Multi_key: XLookupString (&event->xkey, dummy, 200, &keysym, 0);
+/* Fallthrough!! */
+default:
+if (simple_p) return (Qnil);
+/* #### without return_value_sunos_bug, %l0 (GCC struct return pointer)
+* ####  gets roached (top 8 bits cleared) around this call.
+*/
+/* !!#### not Mule-ized */
+name = XKeysymToString (keysym);
+if (!name || !name[0])	/* this shouldn't happen... */
+	{
+	  char buf [255];
+	  sprintf (buf, "unknown_keysym_0x%X", (int) keysym);
+	  return (KEYSYM (buf));
+	}
+/* If it's got a one-character name, that's good enough. */
+if (!name[1]) return (make_char (name[0]));
+/* If it's in the "Keyboard" character set, downcase it.
+	 The case of those keysyms is too totally random for us to
+	 force anyone to remember them.
+	 The case of the other character sets is significant, however.
+	 */
+if ((((unsigned int) keysym) & (~0xFF)) == ((unsigned int) 0xFF00))
+	{
+	  char buf [255];
+	  char *s1, *s2;
+	  for (s1 = name, s2 = buf; *s1; s1++, s2++)
+	    *s2 = tolower (* (unsigned char *) s1);
+	  *s2 = 0;
+	  return (KEYSYM (buf));
+	}
+return (KEYSYM (name));
+}
+#ifdef SUNOS_GCC_L0_BUG
+# undef return
+return_it:
+return;
+#endif
+}
+#ifdef SUNOS_GCC_L0_BUG
+/* #### */
+static Lisp_Object
+x_to_emacs_keysym (XEvent *event, int simple_p)
+{
+Lisp_Object return_value_sunos_bug;
+x_to_emacs_keysym_sunos_bug (&return_value_sunos_bug, event, simple_p);
+return (return_value_sunos_bug);
+}
+#endif
+static void
+set_last_server_timestamp (struct device *d, XEvent *x_event)
+{
+switch (x_event->xany.type)
+{
+case KeyPress:
+case KeyRelease:
+DEVICE_X_LAST_SERVER_TIMESTAMP (d) = x_event->xkey.time;
+break;
+case ButtonPress:
+case ButtonRelease:
+DEVICE_X_LAST_SERVER_TIMESTAMP (d) = x_event->xbutton.time;
+break;
+case MotionNotify:
+DEVICE_X_LAST_SERVER_TIMESTAMP (d) = x_event->xmotion.time;
+break;
+case EnterNotify:
+case LeaveNotify:
+DEVICE_X_LAST_SERVER_TIMESTAMP (d) = x_event->xcrossing.time;
+break;
+case PropertyNotify:
+DEVICE_X_LAST_SERVER_TIMESTAMP (d) = x_event->xproperty.time;
+break;
+case SelectionClear:
+DEVICE_X_LAST_SERVER_TIMESTAMP (d) = x_event->xselectionclear.time;
+break;
+case SelectionRequest:
+DEVICE_X_LAST_SERVER_TIMESTAMP (d) = x_event->xselectionrequest.time;
+break;
+case SelectionNotify:
+DEVICE_X_LAST_SERVER_TIMESTAMP (d) = x_event->xselection.time;
+break;
+}
+}
+static int
+x_event_to_emacs_event (XEvent *x_event, struct Lisp_Event *emacs_event)
+{
+Display *display = x_event->xany.display;
+struct device *d = get_device_from_display (display);
+struct x_device *xd = DEVICE_X_DATA (d);
+set_last_server_timestamp (d, x_event);
+switch (x_event->xany.type)
+{
+case KeyRelease:
+x_handle_sticky_modifiers (x_event, d);
+return 0;
+case KeyPress:
+case ButtonPress:
+case ButtonRelease:
+{
+	unsigned int modifiers = 0;
+	int shift_p;
+	int lock_p;
+#ifdef EXTERNAL_WIDGET
+	struct frame *f = x_any_window_to_frame (d, x_event->xany.window);
+#endif
+	/* If this is a synthetic KeyPress or Button event, and the user
+	   has expressed a disinterest in this security hole, then drop
+	   it on the floor.
+	   */
+	if (((x_event->xany.type == KeyPress)
+	     ? x_event->xkey.send_event
+	     : x_event->xbutton.send_event)
+#ifdef EXTERNAL_WIDGET
+	    /* ben: events get sent to an ExternalShell using XSendEvent.
+	       This is not a perfect solution. */
+	    && !FRAME_X_EXTERNAL_WINDOW_P (f)
+#endif
+	    && !x_allow_sendevents)
+	  return 0;
+	x_handle_sticky_modifiers (x_event, d);
+	shift_p = x_event->xkey.state & ShiftMask;
+	lock_p  = x_event->xkey.state & LockMask;
+	if (x_event->xany.type == KeyPress)
+	  DEVICE_X_GLOBAL_MOUSE_TIMESTAMP (d) = x_event->xkey.time;
+	else
+	  DEVICE_X_GLOBAL_MOUSE_TIMESTAMP (d) = x_event->xbutton.time;
+	/* Ignore the caps-lock key w.r.t. mouse presses and releases. */
+	if (x_event->xany.type != KeyPress)
+	  lock_p = 0;
+	if (x_event->xkey.state & ControlMask)    modifiers |= MOD_CONTROL;
+	if (x_event->xkey.state & xd->MetaMask)   modifiers |= MOD_META;
+	if (x_event->xkey.state & xd->SuperMask)  modifiers |= MOD_SUPER;
+	if (x_event->xkey.state & xd->HyperMask)  modifiers |= MOD_HYPER;
+	if (x_event->xkey.state & xd->AltMask)    modifiers |= MOD_ALT;
+	/* Ignore the caps-lock key if any other modifiers are down; this is
+	   so that Caps doesn't turn C-x into C-X, which would suck. */
+	if (modifiers)
+	  {
+	    x_event->xkey.state &= (~LockMask);
+	    lock_p = 0;
+	  }
+	if (shift_p || lock_p)
+	  modifiers |= MOD_SHIFT;
+	DEVICE_X_MOUSE_TIMESTAMP (d) = DEVICE_X_GLOBAL_MOUSE_TIMESTAMP (d);
+	switch (x_event->xany.type)
+	  {
+	  case KeyPress:
+	    {
+	      Lisp_Object keysym;
+	      KeyCode keycode = x_event->xkey.keycode;
+	      if (x_key_is_modifier_p (keycode, d)) /* it's a modifier key */
+		return 0;
+	      /* This used to compute the frame from the given X window
+		 and store it here, but we really don't care about the
+		 frame. */
+	      emacs_event->channel = DEVICE_CONSOLE (d);
+	      keysym = x_to_emacs_keysym (x_event, 0);
+	      /* If the emacs keysym is nil, then that means that the
+		 X keysym was NoSymbol, which probably means that
+		 we're in the midst of reading a Multi_key sequence,
+		 or a "dead" key prefix.  Ignore it. */
+	      if (NILP (keysym))
+		return 0;
+	      /* More caps-lock garbage: caps-lock should *only* add
+		 the shift modifier to two-case keys (that is, A-Z and
+		 related characters).  So at this point (after looking
+		 up the keysym) if the keysym isn't a dual-case
+		 alphabetic, and if the caps lock key was down but the
+		 shift key wasn't, then turn off the shift modifier.
+		 Gag barf retch. */
+	      /* #### type lossage: assuming equivalence of emacs and
+		 X keysyms */
+	      /* !!#### maybe fix for Mule */
+	      if (! (CHAR_OR_CHAR_INTP (keysym)
+		     && keysym_obeys_caps_lock_p
+		     ((KeySym) XCHAR_OR_CHAR_INT (keysym), d))
+		  && lock_p
+		  && !shift_p)
+		modifiers &= (~MOD_SHIFT);
+	      /* If this key contains two distinct keysyms, that is,
+		 "shift" generates a different keysym than the
+		 non-shifted key, then don't apply the shift modifier
+		 bit: it's implicit.  Otherwise, if there would be no
+		 other way to tell the difference between the shifted
+		 and unshifted version of this key, apply the shift
+		 bit.  Non-graphics, like Backspace and F1 get the
+		 shift bit in the modifiers slot.  Neither the
+		 characters "a", "A", "2", nor "@" normally have the
+		 shift bit set.  However, "F1" normally does. */
+	      if (modifiers & MOD_SHIFT)
+		{
+		  KeySym top, bot;
+		  if (x_event->xkey.state & xd->ModeMask)
+		    bot = XLookupKeysym (&x_event->xkey, 2),
+		    top = XLookupKeysym (&x_event->xkey, 3);
+		  else
+		    bot = XLookupKeysym (&x_event->xkey, 0),
+		    top = XLookupKeysym (&x_event->xkey, 1);
+		  if (top && bot && top != bot)
+		    modifiers &= ~MOD_SHIFT;
+		}
+	      emacs_event->event_type	   = key_press_event;
+	      emacs_event->timestamp	   = x_event->xkey.time;
+	      emacs_event->event.key.modifiers = modifiers;
+	      emacs_event->event.key.keysym   = keysym;
+	      break;
+	    }
+	  case ButtonPress:
+	  case ButtonRelease:
+	    {
+	      struct frame *frame =
+		x_window_to_frame (d, x_event->xbutton.window);
+	      if (! frame)
+		return 0;	/* not for us */
+	      XSETFRAME (emacs_event->channel, frame);
+	    }
+	    if (x_event->type == ButtonPress)
+	      emacs_event->event_type    = button_press_event;
+	    else emacs_event->event_type = button_release_event;
+	    emacs_event->timestamp		    = x_event->xbutton.time;
+	    emacs_event->event.button.modifiers = modifiers;
+	    emacs_event->event.button.button    = x_event->xbutton.button;
+	    emacs_event->event.button.x         = x_event->xbutton.x;
+	    emacs_event->event.button.y         = x_event->xbutton.y;
+	    break;
+	  }
+}
+break;
+case MotionNotify:
+{
+	Window w = x_event->xmotion.window;
+	struct frame *frame = x_window_to_frame (d, w);
+	XEvent event2;
+	if (! frame)
+	  return 0; /* not for us */
+	/* We use MotionHintMask, so we will get only one motion event
+	   until the next time we call XQueryPointer or the user clicks
+	   the mouse.  So call XQueryPointer now (meaning that the event
+	   will be in sync with the server just before Fnext_event()
+	   returns).  If the mouse is still in motion, then the server
+	   will immediately generate exactly one more motion event, which
+	   will be on the queue waiting for us next time around.
+	   */
+	event2 = *x_event;
+	if (XQueryPointer (x_event->xmotion.display, event2.xmotion.window,
+			   &event2.xmotion.root, &event2.xmotion.subwindow,
+			   &event2.xmotion.x_root, &event2.xmotion.y_root,
+			   &event2.xmotion.x, &event2.xmotion.y,
+			   &event2.xmotion.state))
+	  *x_event = event2;
+	DEVICE_X_MOUSE_TIMESTAMP (d) = x_event->xmotion.time;
+	XSETFRAME (emacs_event->channel, frame);
+	emacs_event->event_type	  = pointer_motion_event;
+	emacs_event->timestamp	  = x_event->xmotion.time;
+	emacs_event->event.motion.x = x_event->xmotion.x;
+	emacs_event->event.motion.y = x_event->xmotion.y;
+	{
+	  unsigned int modifiers = 0;
+	  if (x_event->xmotion.state & ShiftMask)   modifiers |= MOD_SHIFT;
+	  if (x_event->xmotion.state & ControlMask) modifiers |= MOD_CONTROL;
+	  if (x_event->xmotion.state & xd->MetaMask)    modifiers |= MOD_META;
+	  if (x_event->xmotion.state & xd->SuperMask)   modifiers |= MOD_SUPER;
+	  if (x_event->xmotion.state & xd->HyperMask)   modifiers |= MOD_HYPER;
+	  if (x_event->xmotion.state & xd->AltMask)     modifiers |= MOD_ALT;
+	  /* Currently ignores Shift_Lock but probably shouldn't
+	     (but it definitely should ignore Caps_Lock). */
+	  emacs_event->event.motion.modifiers = modifiers;
+	}
+}
+break;
+case ClientMessage:
+/* Patch bogus TAKE_FOCUS messages from MWM; CurrentTime is passed as the
+	 timestamp of the TAKE_FOCUS, which the ICCCM explicitly prohibits. */
+if (x_event->xclient.message_type == DEVICE_XATOM_WM_PROTOCOLS (d)
+	  && x_event->xclient.data.l[0] == DEVICE_XATOM_WM_TAKE_FOCUS (d)
+	  && x_event->xclient.data.l[1] == 0)
+	{
+	  x_event->xclient.data.l[1] = DEVICE_X_LAST_SERVER_TIMESTAMP (d);
+	}
+/* fall through */
+default: /* it's a magic event */
+{
+	struct frame *f;
+	switch (x_event->type)
+	  {
+	    /* Note: the number of cases could be reduced to two or
+	       three by using xany.window, but it's perhaps clearer
+	       and potentially more robust this way */
+	  case SelectionRequest:
+	    f = x_window_to_frame (d, x_event->xselectionrequest.owner);
+	    break;
+	  case SelectionClear:
+	    f = x_window_to_frame (d, x_event->xselectionclear.window);
+	    break;
+	  case SelectionNotify:
+	    f = x_window_to_frame (d, x_event->xselection.requestor);
+	    break;
+	  case PropertyNotify:
+	    f = x_window_to_frame (d, x_event->xproperty.window);
+	    break;
+	  case Expose:
+	  case GraphicsExpose:
+	    f = x_window_to_frame (d, x_event->xexpose.window);
+	    break;
+	  case MapNotify:
+	  case UnmapNotify:
+	    f = x_any_window_to_frame (d, x_event->xmap.window);
+	    break;
+	  case EnterNotify:
+	  case LeaveNotify:
+	    f = x_any_window_to_frame (d, x_event->xcrossing.window);
+	    break;
+	  case FocusIn:
+	  case FocusOut:
+	    /* It's curious that we're using x_any_window_to_frame()
+	       here.  I don't know if this causes problems. */
+	    f = x_any_window_to_frame (d, x_event->xfocus.window);
+	  case ClientMessage:
+	    f = x_any_window_to_frame (d, x_event->xclient.window);
+	    break;
+	  case MappingNotify:
+	  case VisibilityNotify:
+	    f = x_any_window_to_frame (d, x_event->xvisibility.window);
+	    break;
+	  case ConfigureNotify:
+	    f = x_any_window_to_frame (d, x_event->xconfigure.window);
+	    break;
+	  default:
+	    f = x_any_window_to_frame (d, x_event->xany.window);
+	    break;
+	  }
+	if (!f)
+	  return 0;
+	emacs_event->event_type = magic_event;
+	XSETFRAME (emacs_event->channel, f);
+	memcpy ((char *) &emacs_event->event.magic.underlying_x_event,
+		(char *) x_event,
+		sizeof (XEvent));
+	break;
+}
+}
+return 1;
+}
+/************************************************************************/
+/*                           magic-event handling                       */
+/************************************************************************/
+static void
+handle_focus_event_1 (struct frame *f, int in_p)
+{
+/* On focus change, clear all memory of sticky modifiers
+to avoid non-intuitive behavior. */
+clear_sticky_modifiers (XDEVICE (FRAME_DEVICE (f)));
+/* We don't want to handle the focus change now, because we might
+be in an accept-process-output, sleep-for, or sit-for.  So
+we enqueue it.
+Actually, we half handle it: we handle it as far as changing the
+box cursor for redisplay, but we don't call any hooks or do any
+select-frame stuff until after the sit-for.
+*/
+{
+Lisp_Object frm;
+Lisp_Object conser;
+struct gcpro gcpro1;
+XSETFRAME (frm, f);
+conser = Fcons (frm, Fcons (FRAME_DEVICE (f), in_p ? Qt : Qnil));
+GCPRO1 (conser);
+emacs_handle_focus_change_preliminary (conser);
+enqueue_magic_eval_event (emacs_handle_focus_change_final,
+			      conser);
+UNGCPRO;
+}
+}
+/* This is called from the external-widget code */
+void emacs_Xt_handle_focus_event (XEvent *event);
+void
+emacs_Xt_handle_focus_event (XEvent *event)
+{
+/*
+* It's curious that we're using x_any_window_to_frame() instead
+* of x_window_to_frame().  I don't know what the impact of this is.
+*/
+struct frame *f =
+x_any_window_to_frame (get_device_from_display (event->xany.display),
+			   event->xfocus.window);
+if (!f)
+/* focus events are sometimes generated just before
+a frame is destroyed. */
+return;
+handle_focus_event_1 (f, event->xany.type == FocusIn);
+}
+static void
+handle_map_event (struct frame *f, XEvent *event)
+{
+Lisp_Object frame = Qnil;
+XSETFRAME (frame, f);
+if (event->xany.type == MapNotify)
+{
+XWindowAttributes xwa;
+/* Bleagh!!!!!!  Apparently some window managers (e.g. MWM)
+	 send synthetic MapNotify events when a window is first
+	 created, EVENT IF IT'S CREATED ICONIFIED OR INVISIBLE.
+	 Or something like that.  We initially tried a different
+	 solution below, but that ran into a different window-
+	 manager bug.
+	 It seems that the only reliable way is to treat a
+	 MapNotify event as a "hint" that the window might or
+	 might not be visible, and check explicitly. */
+XGetWindowAttributes (event->xany.display, event->xmap.window,
+			    &xwa);
+if (xwa.map_state != IsViewable)
+	{
+	  /* Calling Fframe_iconified_p is the only way we have to
+correctly update FRAME_ICONIFIED_P */
+	  Fframe_iconified_p (frame);
+	  return;
+	}
+FRAME_X_TOTALLY_VISIBLE_P (f) = 1;
+#if 0
+/* Bleagh again!!!!  We initially tried the following hack
+	 around the MWM problem, but it turns out that TWM
+	 has a race condition when you un-iconify, where it maps
+	 the window and then tells the server that the window
+	 is un-iconified.  Usually, XEmacs wakes up between
+	 those two occurrences, and thus thinks that un-iconified
+	 windows are still iconified.
+	 Ah, the joys of X. */
+/* By Emacs definition, a frame that is iconified is not
+	 visible.  Marking a frame as visible will automatically cause
+	 frame-iconified-p to return nil, regardless of whether the
+	 frame is actually iconified.  Therefore, we have to ignore
+	 MapNotify events on iconified frames. (It's not obvious
+	 to me why these are being sent, but it happens at startup
+	 with frames that are initially iconified; perhaps they are
+	 synthetic MapNotify events coming from the window manager.)
+	 Note that `frame-iconified-p' queries the server
+	 to determine whether the frame is currently iconified,
+	 rather than consulting some internal (and likely
+	 inaccurate) state flag.  Therefore, ignoring the MapNotify
+	 is correct. */
+if (!f->visible && NILP (Fframe_iconified_p (frame)))
+#endif
+if (!f->visible)
+	{
+	  f->visible = 1;
+	  /* This improves the double flicker when uniconifying a frame
+	     some.  A lot of it is not showing a buffer which has changed
+	     while the frame was iconified.  To fix it further requires
+	     the good 'ol double redisplay structure. */
+	  MARK_FRAME_WINDOWS_STRUCTURE_CHANGED (f);
+	  va_run_hook_with_args (Qmap_frame_hook, 1, frame);
+#ifdef EPOCH
+	  dispatch_epoch_event (f, event, Qx_map);
+#endif
+	}
+}
+else
+{
+FRAME_X_TOTALLY_VISIBLE_P (f) = 0;
+if (f->visible)
+	{
+	  f->visible = 0;
+	  va_run_hook_with_args (Qunmap_frame_hook, 1, frame);
+#ifdef EPOCH
+	  dispatch_epoch_event (f, event, Qx_unmap);
+#endif
+	}
+/* Calling Fframe_iconified_p is the only way we have to
+correctly update FRAME_ICONIFIED_P */
+Fframe_iconified_p (frame);
+}
+}
+static void
+handle_client_message (struct frame *f, XEvent *event)
+{
+struct device *d = XDEVICE (FRAME_DEVICE (f));
+Lisp_Object frame = Qnil;
+XSETFRAME (frame, f);
+if (event->xclient.message_type == DEVICE_XATOM_WM_PROTOCOLS (d) &&
+event->xclient.data.l[0] == DEVICE_XATOM_WM_DELETE_WINDOW (d))
+{
+/* WM_DELETE_WINDOW is a misc-user event, but other ClientMessages,
+	 such as WM_TAKE_FOCUS, are eval events.  That's because delete-window
+	 was probably executed with a mouse click, while the others could
+	 have been sent as a result of mouse motion or some other implicit
+	 action.  (Call this a "heuristic"...)  The reason for caring about
+	 this is so that clicking on the close-box will make emacs prompt
+	 using a dialog box instead of the minibuffer if there are unsaved
+	 buffers.
+	 */
+enqueue_misc_user_event (frame, Qeval,
+			       list3 (Qdelete_frame, frame, Qt));
+}
+else if (event->xclient.message_type == DEVICE_XATOM_WM_PROTOCOLS (d) &&
+	   event->xclient.data.l[0] == DEVICE_XATOM_WM_TAKE_FOCUS (d))
+{
+handle_focus_event_1 (f, 1);
+#if 0
+/* If there is a dialog box up, focus on it.
+	 #### Actually, we're raising it too, which is wrong.  We should
+	 #### just focus on it, but lwlib doesn't currently give us an
+	 #### easy way to do that.  This should be fixed.
+	 */
+unsigned long take_focus_timestamp = event->xclient.data.l[1];
+Widget widget = lw_raise_all_pop_up_widgets ();
+if (widget)
+	{
+	  /* kludge: raise_all returns bottommost widget, but we really
+	     want the topmost.  So just raise it for now. */
+	  XMapRaised (XtDisplay (widget), XtWindow (widget));
+	  /* Grab the focus with the timestamp of the TAKE_FOCUS. */
+	  XSetInputFocus (XtDisplay (widget), XtWindow (widget),
+			  RevertToParent, take_focus_timestamp);
+	}
+#endif
+}
+#ifdef EPOCH
+dispatch_epoch_event (f, event, Qx_client_message);
+#endif
+}
+static void
+emacs_Xt_handle_magic_event (struct Lisp_Event *emacs_event)
+{
+/* This function can GC */
+XEvent *event = (XEvent *) &emacs_event->event.magic.underlying_x_event;
+struct frame *f = XFRAME (EVENT_CHANNEL (emacs_event));
+if (!FRAME_LIVE_P (f))
+return;
+switch (event->type)
+{
+case SelectionRequest:
+x_handle_selection_request (&event->xselectionrequest);
+break;
+case SelectionClear:
+x_handle_selection_clear (&event->xselectionclear);
+break;
+case SelectionNotify:
+x_handle_selection_notify (&event->xselection);
+break;
+case PropertyNotify:
+x_handle_property_notify (&event->xproperty);
+#ifdef EPOCH
+dispatch_epoch_event (f, event, Qx_property_change);
+#endif
+break;
+case Expose:
+x_redraw_exposed_area (f, event->xexpose.x, event->xexpose.y,
+			     event->xexpose.width, event->xexpose.height);
+break;
+case GraphicsExpose: /* This occurs when an XCopyArea's source area was
+			    obscured or not available. */
+x_redraw_exposed_area (f, event->xexpose.x, event->xexpose.y,
+			     event->xexpose.width, event->xexpose.height);
+break;
+case MapNotify:
+case UnmapNotify:
+handle_map_event (f, event);
+break;
+case EnterNotify:
+if (event->xcrossing.detail != NotifyInferior)
+	{
+	  Lisp_Object frame;
+	  XSETFRAME (frame, f);
+	  /* FRAME_X_MOUSE_P (f) = 1; */
+	  va_run_hook_with_args (Qmouse_enter_frame_hook, 1, frame);
+	}
+break;
+case LeaveNotify:
+if (event->xcrossing.detail != NotifyInferior)
+	{
+	  Lisp_Object frame;
+	  XSETFRAME (frame, f);
+	  /* FRAME_X_MOUSE_P (f) = 0; */
+	  va_run_hook_with_args (Qmouse_leave_frame_hook, 1, frame);
+	}
+break;
+case FocusIn:
+case FocusOut:
+#ifdef EXTERNAL_WIDGET
+/* External widget lossage: Ben said:
+	 YUCK.  The only way to make focus changes work properly is to
+	 completely ignore all FocusIn/FocusOut events and depend only
+	 on notifications from the ExternalClient widget. */
+if (FRAME_X_EXTERNAL_WINDOW_P (f))
+	break;
+#endif
+handle_focus_event_1 (f, event->xany.type == FocusIn);
+break;
+case ClientMessage:
+handle_client_message (f, event);
+break;
+#if 0
+/* this is where we ought to be handling this event, but
+	 we don't see it here. --ben */
+case MappingNotify:	/* The user has run xmodmap */
+#endif
+case VisibilityNotify: /* window visiblity has changed */
+if (event->xvisibility.state == VisibilityUnobscured)
+	FRAME_X_TOTALLY_VISIBLE_P (f) = 1;
+else
+	FRAME_X_TOTALLY_VISIBLE_P (f) = 0;
+break;
+case ConfigureNotify:
+if (event->xconfigure.window != XtWindow (FRAME_X_SHELL_WIDGET (f)))
+	break;
+FRAME_X_SHELL_WIDGET (f)->core.x = event->xconfigure.x;
+FRAME_X_SHELL_WIDGET (f)->core.y = event->xconfigure.y;
+break;
+default:
+break;
+}
+}
+/************************************************************************/
+/*				timeout events				*/
+/************************************************************************/
+static int timeout_id_tick;
+/* Xt interval id's might not fit into an int (they're pointers, as it
+happens), so we need to provide a conversion list. */
+struct Xt_timeout
+{
+int id;
+XtIntervalId interval_id;
+struct Xt_timeout *next;
+} *pending_timeouts, *completed_timeouts;
+struct Xt_timeout_blocktype
+{
+Blocktype_declare (struct Xt_timeout);
+} *the_Xt_timeout_blocktype;
+/* called by XtAppNextEvent() */
+static void
+Xt_timeout_callback (XtPointer closure, XtIntervalId *id)
+{
+struct Xt_timeout *timeout = (struct Xt_timeout *) closure;
+struct Xt_timeout *t2 = pending_timeouts;
+/* Remove this one from the list of pending timeouts */
+if (t2 == timeout)
+pending_timeouts = pending_timeouts->next;
+else
+{
+while (t2->next && t2->next != timeout) t2 = t2->next;
+assert (t2->next);
+t2->next = t2->next->next;
+}
+/* Add this one to the list of completed timeouts */
+timeout->next = completed_timeouts;
+completed_timeouts = timeout;
+}
+static int
+emacs_Xt_add_timeout (EMACS_TIME thyme)
+{
+struct Xt_timeout *timeout = Blocktype_alloc (the_Xt_timeout_blocktype);
+EMACS_TIME current_time;
+int milliseconds;
+timeout->id = timeout_id_tick++;
+timeout->next = pending_timeouts;
+pending_timeouts = timeout;
+EMACS_GET_TIME (current_time);
+EMACS_SUB_TIME (thyme, thyme, current_time);
+milliseconds = EMACS_SECS (thyme) * 1000 +
+EMACS_USECS (thyme) / 1000;
+if (milliseconds < 1)
+milliseconds = 1;
+timeout->interval_id = XtAppAddTimeOut (Xt_app_con, milliseconds,
+					  Xt_timeout_callback,
+					  (XtPointer) timeout);
+return timeout->id;
+}
+static void
+emacs_Xt_remove_timeout (int id)
+{
+struct Xt_timeout *timeout, *t2;
+/* Find the timeout on the list of pending ones, if it's still there. */
+if (!pending_timeouts) return;
+if (id == pending_timeouts->id)
+{
+timeout = pending_timeouts;
+pending_timeouts = pending_timeouts->next;
+}
+else
+{
+t2 = pending_timeouts;
+while (t2->next && t2->next->id != id) t2 = t2->next;
+if (! t2->next) return;
+timeout = t2->next;
+t2->next = t2->next->next;
+}
+/* At this point, we've found the thing on the list of pending timeouts,
+and removed it.
+*/
+XtRemoveTimeOut (timeout->interval_id);
+Blocktype_free (the_Xt_timeout_blocktype, timeout);
+}
+static void
+Xt_timeout_to_emacs_event (struct Lisp_Event *emacs_event)
+{
+struct Xt_timeout *timeout = completed_timeouts;
+assert (timeout);
+completed_timeouts = completed_timeouts->next;
+emacs_event->event_type = timeout_event;
+/* timeout events have nil as channel */
+emacs_event->timestamp  = 0; /* #### wrong!! */
+emacs_event->event.timeout.interval_id = timeout->id;
+Blocktype_free (the_Xt_timeout_blocktype, timeout);
+}
+/************************************************************************/
+/*			process and tty events				*/
+/************************************************************************/
+struct what_is_ready_closure
+{
+int fd;
+Lisp_Object what;
+XtInputId id;
+};
+static Lisp_Object *filedesc_with_input;
+static struct what_is_ready_closure **filedesc_to_what_closure;
+static void
+init_what_input_once (void)
+{
+int i;
+filedesc_with_input = (Lisp_Object *)
+xmalloc (MAXDESC * sizeof (Lisp_Object));
+filedesc_to_what_closure = (struct what_is_ready_closure **)
+xmalloc (MAXDESC * sizeof (struct what_is_ready_closure *));
+for (i = 0; i < MAXDESC; i++)
+{
+filedesc_to_what_closure[i] = 0;
+filedesc_with_input[i] = Qnil;
+}
+process_events_occurred = 0;
+tty_events_occurred = 0;
+}
+static void
+mark_what_as_being_ready (struct what_is_ready_closure *closure)
+{
+if (NILP (filedesc_with_input[closure->fd]))
+{
+SELECT_TYPE temp_mask;
+FD_ZERO (&temp_mask);
+FD_SET (closure->fd, &temp_mask);
+/* Check to make sure there's *really* input available.
+	 Sometimes things seem to get confused and this gets called
+	 for the tty fd when there's really only input available
+	 on some process's fd.	(It will subsequently get called
+	 for that process's fd, so returning without setting any
+	 flags will take care of it.)  To see the problem, uncomment
+	 the stderr_out below, turn NORMAL_QUIT_CHECK_TIMEOUT_MSECS
+	 down to 25, do sh -c 'xemacs -nw -q -f shell 2>/tmp/log'
+	 and press return repeatedly.  (Seen under AIX & Linux.)
+	 -dkindred@cs.cmu.edu */
+if (!poll_fds_for_input (temp_mask))
+	{
+#if 0
+	  stderr_out ("mark_what_as_being_ready: no input available (fd=%d)\n",
+		      closure->fd);
+#endif
+	  return;
+	}
+filedesc_with_input[closure->fd] = closure->what;
+if (PROCESSP (closure->what))
+/* Don't increment this if the current process is already marked
+*  as having input. */
+	process_events_occurred++;
+else
+	tty_events_occurred++;
+}
+}
+static void
+Xt_what_callback (void *closure, int *source, XtInputId *id)
+{
+/* If closure is 0, then we got a fake event from a signal handler.
+The only purpose of this is to make XtAppProcessEvent() stop
+blocking. */
+if (closure)
+mark_what_as_being_ready ((struct what_is_ready_closure *) closure);
+else
+{
+fake_event_occurred++;
+drain_signal_event_pipe ();
+}
+}
+static void
+select_filedesc (int fd, Lisp_Object what)
+{
+struct what_is_ready_closure *closure;
+/* If somebody is trying to select something that's already selected
+for, then something went wrong.  The generic routines ought to
+detect this and error before here. */
+assert (!filedesc_to_what_closure[fd]);
+closure = (struct what_is_ready_closure *) xmalloc (sizeof (*closure));
+closure->fd = fd;
+closure->what = what;
+closure->id =
+XtAppAddInput (Xt_app_con, fd,
+		   (XtPointer) (XtInputReadMask /* | XtInputExceptMask */),
+		   Xt_what_callback, closure);
+filedesc_to_what_closure[fd] = closure;
+}
+static void
+unselect_filedesc (int fd)
+{
+struct what_is_ready_closure *closure = filedesc_to_what_closure[fd];
+assert (closure);
+if (!NILP (filedesc_with_input[fd]))
+{
+/* We are unselecting this process before we have drained the rest of
+	 the input from it, probably from status_notify() in the command loop.
+	 This can happen like so:
+	  - We are waiting in XtAppNextEvent()
+	  - Process generates output
+	  - Process is marked as being ready
+	  - Process dies, SIGCHLD gets generated before we return (!?)
+	    It could happen I guess.
+	  - sigchld_handler() marks process as dead
+	  - Somehow we end up getting a new KeyPress event on the queue
+	    at the same time (I'm really so sure how that happens but I'm
+	    not sure it can't either so let's assume it can...).
+	  - Key events have priority so we return that instead of the proc.
+	  - Before dispatching the lisp key event we call status_notify()
+	  - Which deselects the process that SIGCHLD marked as dead.
+	 Thus we never remove it from _with_input and turn it into a lisp
+	 event, so we need to do it here.  But this does not mean that we're
+	 throwing away the last block of output - status_notify() has already
+	 taken care of running the proc filter or whatever.
+*/
+filedesc_with_input[fd] = Qnil;
+if (PROCESSP (closure->what))
+	{
+	  assert (process_events_occurred > 0);
+	  process_events_occurred--;
+	}
+else
+	{
+	  assert (tty_events_occurred > 0);
+	  tty_events_occurred--;
+	}
+}
+XtRemoveInput (closure->id);
+xfree (closure);
+filedesc_to_what_closure[fd] = 0;
+}
+static void
+emacs_Xt_select_process (struct Lisp_Process *p)
+{
+int infd;
+Lisp_Object process;
+infd = event_stream_unixoid_select_process (p);
+XSETPROCESS (process, p);
+select_filedesc (infd, process);
+}
+static void
+emacs_Xt_unselect_process (struct Lisp_Process *p)
+{
+int infd;
+infd = event_stream_unixoid_unselect_process (p);
+unselect_filedesc (infd);
+}
+/* This is called from GC when a process object is about to be freed.
+If we've still got pointers to it in this file, we're gonna lose hard.
+*/
+void
+debug_process_finalization (struct Lisp_Process *p)
+{
+#if 0 /* #### */
+int i;
+int infd, outfd;
+get_process_file_descriptors (p, &infd, &outfd);
+/* if it still has fds, then it hasn't been killed yet. */
+assert (infd < 0);
+assert (outfd < 0);
+/* Better not still be in the "with input" table; we know it's got no fds. */
+for (i = 0; i < MAXDESC; i++)
+{
+Lisp_Object process = filedesc_fds_with_input [i];
+assert (!PROCESSP (process) || XPROCESS (process) != p);
+}
+#endif
+}
+static void
+Xt_process_to_emacs_event (struct Lisp_Event *emacs_event)
+{
+int i;
+Lisp_Object process;
+assert (process_events_occurred > 0);
+for (i = 0; i < MAXDESC; i++)
+{
+process = filedesc_with_input[i];
+if (PROCESSP (process))
+	break;
+}
+assert (i < MAXDESC);
+filedesc_with_input[i] = Qnil;
+process_events_occurred--;
+/* process events have nil as channel */
+emacs_event->event_type = process_event;
+emacs_event->timestamp  = 0; /* #### */
+emacs_event->event.process.process = process;
+}
+static void
+emacs_Xt_select_console (struct console *con)
+{
+Lisp_Object console = Qnil;
+int infd;
+if (CONSOLE_X_P (con))
+return; /* X consoles are automatically selected for when we
+	       initialize them in Xt */
+infd = event_stream_unixoid_select_console (con);
+XSETCONSOLE (console, con);
+select_filedesc (infd, console);
+}
+static void
+emacs_Xt_unselect_console (struct console *con)
+{
+Lisp_Object console = Qnil;
+int infd;
+if (CONSOLE_X_P (con))
+return; /* X consoles are automatically selected for when we
+	       initialize them in Xt */
+infd = event_stream_unixoid_unselect_console (con);
+XSETCONSOLE (console, con);
+unselect_filedesc (infd);
+}
+/* read an event from a tty, if one is available.  Returns non-zero
+if an event was available.  Note that when this function is
+called, there should always be a tty marked as ready for input.
+However, the input condition might actually be EOF, so there
+may not really be any input available. (In this case,
+read_event_from_tty_or_stream_desc() will arrange for the TTY device
+to be deleted.) */
+static int
+Xt_tty_to_emacs_event (struct Lisp_Event *emacs_event)
+{
+int i;
+assert (tty_events_occurred > 0);
+for (i = 0; i < MAXDESC; i++)
+{
+Lisp_Object console = filedesc_with_input[i];
+if (CONSOLEP (console))
+	{
+	  assert (tty_events_occurred > 0);
+	  tty_events_occurred--;
+	  filedesc_with_input[i] = Qnil;
+	  if (read_event_from_tty_or_stream_desc
+	      (emacs_event, XCONSOLE (console), i))
+	    return 1;
+	}
+}
+return 0;
+}
+/************************************************************************/
+/*		debugging functions to decipher an event		*/
+/************************************************************************/
+#ifdef DEBUG_XEMACS
+#include "xintrinsicp.h"	/* only describe_event() needs this */
+#include <X11/Xproto.h>		/* only describe_event() needs this */
+static void
+describe_event_window (Window window, Display *display)
+{
+struct frame *f;
+Widget w;
+stderr_out ("   window: 0x%x", (int) window);
+w = XtWindowToWidget (display, window);
+if (w)
+stderr_out (" %s", w->core.widget_class->core_class.class_name);
+f = x_any_window_to_frame (get_device_from_display (display), window);
+if (f) {
+char buf[500];
+sprintf (buf, " \"%s\"", string_data (XSTRING (f->name)));
+write_string_to_stdio_stream (stderr, 0, (Bufbyte *) buf, 0, strlen (buf),
+FORMAT_DISPLAY);
+}
+stderr_out ("\n");
+}
+static CONST char *
+XEvent_mode_to_string (int mode)
+{
+switch (mode)
+{
+case NotifyNormal: return "Normal";
+case NotifyGrab: return "Grab";
+case NotifyUngrab: return "Ungrab";
+case NotifyWhileGrabbed: return "WhileGrabbed";
+default:
+return "???";
+}
+}
+static CONST char *
+XEvent_detail_to_string (int detail)
+{
+switch (detail)
+{
+case NotifyAncestor: return "Ancestor";
+case NotifyInferior: return "Inferior";
+case NotifyNonlinear: return "Nonlinear";
+case NotifyNonlinearVirtual: return "NonlinearVirtual";
+case NotifyPointer: return "Pointer";
+case NotifyPointerRoot: return "PointerRoot";
+case NotifyDetailNone: return "DetailNone";
+default:
+return "???";
+}
+}
+static CONST char *
+XEvent_visibility_to_string (int state)
+{
+switch (state)
+{
+case VisibilityFullyObscured: return "FullyObscured";
+case VisibilityPartiallyObscured: return "PartiallyObscured";
+case VisibilityUnobscured: return "Unobscured";
+default:
+return "???";
+}
+}
+static void
+describe_event (XEvent *event)
+{
+char buf[100];
+struct device *d = get_device_from_display (event->xany.display);
+sprintf (buf, "%s%s", x_event_name (event->type),
+	   event->xany.send_event ? " (send)" : "");
+stderr_out ("%-30s", buf);
+switch (event->type)
+{
+case FocusIn:
+case FocusOut:
+{
+	XFocusChangeEvent *ev = &event->xfocus;
+	describe_event_window (ev->window, ev->display);
+	stderr_out ("     mode: %s\n",   XEvent_mode_to_string  (ev->mode));
+	stderr_out ("     detail: %s\n", XEvent_detail_to_string(ev->detail));
+	break;
+}
+case KeyPress:
+{
+	Lisp_Object keysym;
+	XKeyEvent *ev = &event->xkey;
+	unsigned int state = ev->state;
+	describe_event_window (ev->window, ev->display);
+	stderr_out ("   subwindow: %ld\n", ev->subwindow);
+	stderr_out ("   state: ");
+	if (state & ShiftMask)   stderr_out ("Shift ");
+	if (state & LockMask)    stderr_out ("Lock ");
+	if (state & ControlMask) stderr_out ("Control ");
+	if (state & Mod1Mask)    stderr_out ("Mod1 ");
+	if (state & Mod2Mask)    stderr_out ("Mod2 ");
+	if (state & Mod3Mask)    stderr_out ("Mod3 ");
+	if (state & Mod4Mask)    stderr_out ("Mod4 ");
+	if (state & Mod5Mask)    stderr_out ("Mod5 ");
+#if 0 /* Apparently these don't exist? */
+	if (state & MetaMask)    stderr_out ("Meta ");
+	if (state & SuperMask)   stderr_out ("Super ");
+	if (state & HyperMask)   stderr_out ("Hyper ");
+	if (state & AltMask)     stderr_out ("Alt ");
+	if (state & ModeMask)    stderr_out ("Mode_switch ");
+#endif
+	if (! state)
+	  stderr_out ("vanilla\n");
+	else
+	  stderr_out ("\n");
+	if (x_key_is_modifier_p (ev->keycode, d))
+	  stderr_out ("   Modifier key");
+	stderr_out ("   keycode: 0x%x\n", ev->keycode);
+	keysym = x_to_emacs_keysym (event, 0);
+	if (CHAR_OR_CHAR_INTP (keysym))
+	  {
+	    if (XCHAR_OR_CHAR_INT (keysym) > 32
+		&& XCHAR_OR_CHAR_INT (keysym) < 127)
+	      stderr_out ("   keysym: %c\n", XCHAR_OR_CHAR_INT (keysym));
+	    else
+	      stderr_out ("   keysym: %d\n", XCHAR_OR_CHAR_INT (keysym));
+	  }
+	else
+	  stderr_out ("   keysym: %s\n", string_data (XSYMBOL (keysym)->name));
+}
+break;
+case Expose:
+if (x_debug_events > 1)
+	{
+	  XExposeEvent *ev = &event->xexpose;
+	  describe_event_window (ev->window, ev->display);
+	  stderr_out ("   region: %d %d %d %d\n", ev->x, ev->y,
+		      ev->width, ev->height);
+	  stderr_out ("    count: %d\n", ev->count);
+	}
+else
+	stderr_out ("\n");
+break;
+case GraphicsExpose:
+if (x_debug_events > 1)
+	{
+	  XGraphicsExposeEvent *ev = &event->xgraphicsexpose;
+	  describe_event_window (ev->drawable, ev->display);
+	  stderr_out ("    major: %s\n",
+		      (ev ->major_code == X_CopyArea  ? "CopyArea" :
+		       (ev->major_code == X_CopyPlane ? "CopyPlane" : "?")));
+	  stderr_out ("   region: %d %d %d %d\n", ev->x, ev->y,
+		      ev->width, ev->height);
+	  stderr_out ("    count: %d\n", ev->count);
+	}
+else
+	stderr_out ("\n");
+break;
+case EnterNotify:
+case LeaveNotify:
+if (x_debug_events > 1)
+	{
+	  XCrossingEvent *ev = &event->xcrossing;
+	  describe_event_window (ev->window, ev->display);
+#if 0
+	  stderr_out(" subwindow: 0x%x\n", ev->subwindow);
+	  stderr_out("      pos: %d %d\n", ev->x, ev->y);
+	  stderr_out(" root pos: %d %d\n", ev->x_root, ev->y_root);
+#endif
+	  stderr_out("    mode: %s\n",   XEvent_mode_to_string(ev->mode));
+	  stderr_out("    detail: %s\n", XEvent_detail_to_string(ev->detail));
+	  stderr_out("    focus: %d\n", ev->focus);
+#if 0
+	  stderr_out("    state: 0x%x\n", ev->state);
+#endif
+	}
+else
+	stderr_out("\n");
+break;
+case ConfigureNotify:
+if (x_debug_events > 1)
+	{
+	  XConfigureEvent *ev = &event->xconfigure;
+	  describe_event_window (ev->window, ev->display);
+	  stderr_out("    above: 0x%lx\n", ev->above);
+	  stderr_out("     size: %d %d %d %d\n", ev->x, ev->y,
+		     ev->width, ev->height);
+	  stderr_out("  redirect: %d\n", ev->override_redirect);
+	}
+else
+	stderr_out("\n");
+break;
+case VisibilityNotify:
+if (x_debug_events > 1)
+	{
+	  XVisibilityEvent *ev = &event->xvisibility;
+	  describe_event_window (ev->window, ev->display);
+	  stderr_out("    state: %s\n", XEvent_visibility_to_string(ev->state));
+	}
+else
+	stderr_out ("\n");
+break;
+case ClientMessage:
+{
+	XClientMessageEvent *ev = &event->xclient;
+	char *name = XGetAtomName (ev->display, ev->message_type);
+	stderr_out ("%s", name);
+	if (!strcmp (name, "WM_PROTOCOLS")) {
+	  char *protname = XGetAtomName (ev->display, ev->data.l[0]);
+	  stderr_out ("(%s)", protname);
+	  XFree (protname);
+	}
+	XFree (name);
+	stderr_out ("\n");
+	break;
+}
+default:
+stderr_out ("\n");
+break;
+}
+fflush (stdout);
+}
+#endif /* include describe_event definition */
+/************************************************************************/
+/*			get the next event from Xt			*/
+/************************************************************************/
+static Lisp_Object dispatch_event_queue, dispatch_event_queue_tail;
+static void
+enqueue_Xt_dispatch_event (Lisp_Object event)
+{
+enqueue_event (event, &dispatch_event_queue, &dispatch_event_queue_tail);
+}
+Lisp_Object
+dequeue_Xt_dispatch_event (void)
+{
+return dequeue_event (&dispatch_event_queue, &dispatch_event_queue_tail);
+}
+/* This business exists because menu events "happen" when
+menubar_selection_callback() is called from somewhere deep
+within XtAppProcessEvent in emacs_Xt_next_event().  The
+callback needs to terminate the modal loop in that function
+or else it will continue waiting until another event is
+received.
+Same business applies to scrollbar events. */
+void
+signal_special_Xt_user_event (Lisp_Object channel, Lisp_Object function,
+			      Lisp_Object object)
+{
+Lisp_Object event;
+event = Fmake_event ();
+XEVENT (event)->event_type = misc_user_event;
+XEVENT (event)->channel = channel;
+XEVENT (event)->event.eval.function = function;
+XEVENT (event)->event.eval.object = object;
+enqueue_Xt_dispatch_event (event);
+}
+static void
+emacs_Xt_next_event (struct Lisp_Event *emacs_event)
+{
+we_didnt_get_an_event:
+while (NILP (dispatch_event_queue) &&
+	 !completed_timeouts &&
+	 !fake_event_occurred &&
+	 !process_events_occurred &&
+	 !tty_events_occurred)
+{
+/* Stupid logic in XtAppProcessEvent() dictates that, if process
+	 events and X events are both available, the process event gets
+	 taken first.  This will cause an infinite loop if we're being
+	 called from Fdiscard_input().
+*/
+if (XtAppPending (Xt_app_con) & XtIMXEvent)
+XtAppProcessEvent (Xt_app_con, XtIMXEvent);
+else
+	{
+	  Lisp_Object devcons, concons;
+	  /* We're about to block.  Xt has a bug in it (big surprise,
+	     there) in that it blocks using select() and doesn't
+	     flush the Xlib output buffers (XNextEvent() does this
+	     automatically before blocking).  So it's necessary
+	     for us to do this ourselves.  If we don't do it, then
+	     display output may not be seen until the next time
+	     an X event is received. (This happens esp. with
+	     subprocess output that gets sent to a visible buffer.)
+	     #### The above comment may not have any validity. */
+	  DEVICE_LOOP_NO_BREAK (devcons, concons)
+	    {
+	      struct device *d;
+	      d = XDEVICE (XCAR (devcons));
+	      if (DEVICE_X_P (d) && DEVICE_X_DISPLAY (d))
+		/* emacs may be exiting */
+		XFlush (DEVICE_X_DISPLAY (d));
+	    }
+	  XtAppProcessEvent (Xt_app_con, XtIMAll);
+	}
+}
+if (!NILP (dispatch_event_queue))
+{
+Lisp_Object event, event2;
+XSETEVENT (event2, emacs_event);
+event = dequeue_Xt_dispatch_event ();
+Fcopy_event (event, event2);
+Fdeallocate_event (event);
+}
+else if (tty_events_occurred)
+{
+if (!Xt_tty_to_emacs_event (emacs_event))
+	goto we_didnt_get_an_event;
+}
+else if (completed_timeouts)
+Xt_timeout_to_emacs_event (emacs_event);
+else if (fake_event_occurred)
+{
+/* A dummy event, so that a cycle of the command loop will
+	 occur. */
+fake_event_occurred = 0;
+/* eval events have nil as channel */
+emacs_event->event_type = eval_event;
+emacs_event->event.eval.function = Qidentity;
+emacs_event->event.eval.object = Qnil;
+}
+else /* if (process_events_occurred) */
+Xt_process_to_emacs_event (emacs_event);
+/* No need to call XFilterEvent; Xt does it for us */
+}
+void
+emacs_Xt_event_handler (Widget wid /* unused */,
+			XtPointer closure /* unused */,
+			XEvent *event,
+			Boolean *continue_to_dispatch /* unused */)
+{
+Lisp_Object emacs_event = Fmake_event ();
+#ifdef DEBUG_XEMACS
+if (x_debug_events > 0)
+{
+describe_event (event);
+}
+#endif /* DEBUG_XEMACS */
+if (x_event_to_emacs_event (event, XEVENT (emacs_event)))
+enqueue_Xt_dispatch_event (emacs_event);
+else
+Fdeallocate_event (emacs_event);
+}
+/************************************************************************/
+/*                      input pending / C-g checking                    */
+/************************************************************************/
+static Bool
+quit_char_predicate (Display *display, XEvent *event, XPointer data)
+{
+struct device *d = get_device_from_display (display);
+struct x_device *xd = DEVICE_X_DATA (d);
+char c, quit_char;
+Bool *critical = (Bool *) data;
+Lisp_Object keysym;
+if (critical) *critical = False;
+if (event->type != KeyPress) return 0;
+if (! x_any_window_to_frame (d, event->xany.window)) return 0;
+if (event->xkey.state
+& (xd->MetaMask | xd->HyperMask | xd->SuperMask | xd->AltMask))
+return 0;
+/* This duplicates some code that exists elsewhere, but it's relatively
+fast and doesn't cons.
+*/
+keysym = x_to_emacs_keysym (event, 1);
+if (NILP (keysym)) return 0;
+if (CHAR_OR_CHAR_INTP (keysym))
+c = XCHAR_OR_CHAR_INT (keysym);
+/* Highly doubtful that these are the quit character, but... */
+else if (EQ (keysym, QKbackspace))	c = '\b';
+else if (EQ (keysym, QKtab))		c = '\t';
+else if (EQ (keysym, QKlinefeed))	c = '\n';
+else if (EQ (keysym, QKreturn))	c = '\r';
+else if (EQ (keysym, QKescape))	c = 27;
+else if (EQ (keysym, QKspace))	c = ' ';
+else if (EQ (keysym, QKdelete))	c = 127;
+else return 0;
+if (event->xkey.state & xd->MetaMask)     c |= 0x80;
+if ((event->xkey.state & ControlMask) && !(c >= 'A' && c <= 'Z'))
+c &= 0x1F;			/* unshifted control characters */
+quit_char = CONSOLE_QUIT_CHAR (XCONSOLE (DEVICE_CONSOLE (d)));
+if (c == quit_char)
+return True;
+/* If we've got Control-Shift-G instead of Control-G, that means
+we have a critical_quit.  Caps_Lock is its own modifier, so it
+won't cause ^G to act differently than before. */
+if (event->xkey.state & ControlMask)  c &= 0x1F;
+if (c == quit_char)
+{
+if (critical) *critical = True;
+return True;
+}
+return False;
+}
+/* This scans the X input queue for a KeyPress event that matches the
+quit character, and sets Vquit_flag.  This is called from the
+QUIT macro to determine whether we should quit.
+In a SIGIO world, this won't be called unless a SIGIO has happened
+since the last time we checked.
+In a non-SIGIO world, this is called from emacs_Xt_event_pending_p
+(which is called from input_pending_p).
+*/
+static void
+x_check_for_quit_char (Display *display)
+{
+XEvent event;
+int queued;
+Bool critical_quit = False;
+XEventsQueued (display, QueuedAfterReading);
+queued = XCheckIfEvent (display, &event,
+			  quit_char_predicate,
+			  (XtPointer)&critical_quit);
+if (queued)
+{
+Vquit_flag = (critical_quit ? Qcritical : Qt);
+/* don't put the event back onto the queue.  Those functions that
+	 wanted to read a ^G directly have arranged to do this. */
+}
+}
+static void
+check_for_tty_quit_char (struct device *d)
+{
+SELECT_TYPE temp_mask;
+int infd = DEVICE_INFD (d);
+struct console *con = XCONSOLE (DEVICE_CONSOLE (d));
+Emchar quit_char = CONSOLE_QUIT_CHAR (con);
+FD_ZERO (&temp_mask);
+FD_SET (infd, &temp_mask);
+while (1)
+{
+Lisp_Object event;
+Emchar the_char;
+if (!poll_fds_for_input (temp_mask))
+	return;
+event = Fmake_event ();
+if (!read_event_from_tty_or_stream_desc (XEVENT (event), con, infd))
+	/* EOF, or something ... */
+	return;
+/* #### bogus.  quit-char should be allowed to be any sort
+	 of event. */
+the_char = event_to_character (XEVENT (event), 1, 0, 0);
+if (the_char >= 0 && the_char == quit_char)
+	{
+	  Vquit_flag = Qt;
+	  /* do not queue the C-g.  See above. */
+	  return;
+	}
+/* queue the read event to be read for real later. */
+enqueue_Xt_dispatch_event (event);
+}
+}
+static void
+emacs_Xt_quit_p (void)
+{
+Lisp_Object devcons, concons;
+CONSOLE_LOOP (concons)
+{
+struct console *con = XCONSOLE (XCAR (concons));
+if (!con->input_enabled)
+	continue;
+CONSOLE_DEVICE_LOOP (devcons, con)
+	{
+	  struct device *d;
+	  d = XDEVICE (XCAR (devcons));
+	  if (DEVICE_X_P (d) && DEVICE_X_DISPLAY (d))
+	    /* emacs may be exiting */
+	    x_check_for_quit_char (DEVICE_X_DISPLAY (d));
+	  else if (DEVICE_TTY_P (d))
+	    check_for_tty_quit_char (d);
+	}
+}
+}
+static void
+drain_X_queue (void)
+{
+while (XtAppPending (Xt_app_con) & XtIMXEvent)
+XtAppProcessEvent (Xt_app_con, XtIMXEvent);
+}
+static int
+emacs_Xt_event_pending_p (int user_p)
+{
+Lisp_Object event;
+int tick_count_val;
+/* If `user_p' is false, then this function returns whether there are any
+X, timeout, or fd events pending (that is, whether emacs_Xt_next_event()
+would return immediately without blocking).
+if `user_p' is true, then this function returns whether there are any
+*user generated* events available (that is, whether there are keyboard
+or mouse-click events ready to be read).  This also implies that
+emacs_Xt_next_event() would not block.
+In a non-SIGIO world, this also checks whether the user has typed ^G,
+since this is a convenient place to do so.  We don't need to do this
+in a SIGIO world, since input causes an interrupt.
+*/
+#if 0
+/* I don't think there's any point to this and it will nullify
+the speed gains achieved by the sigio_happened checking below.
+Its only advantage is that it may possibly make C-g response
+a bit faster.  The C-g will be noticed within 0.25 second, anyway,
+even without this. */
+#ifndef SIGIO
+/* First check for C-g if necessary */
+emacs_Xt_quit_p ();
+#endif
+#endif
+/* This function used to simply check whether there were any X
+events (or is user_p was 1, it iterated over all the pending
+X events using XCheckIfEvent(), looking for keystrokes and
+button events).  That worked in the old cheesoid event loop,
+which didn't go through XtAppDispatchEvent(), but it doesn't
+work any more -- X events may not result in anything.  For
+example, a button press in a blank part of the menubar appears
+as an X event but will not result in any Emacs events (a
+button press that activates the menubar results in an Emacs
+event through the stop_next_event mechanism).
+The only accurate way of determining whether these X events
+translate into Emacs events is to go ahead and dispatch them
+until there's something on the dispatch queue. */
+/* See if there are any user events already on the queue. */
+EVENT_CHAIN_LOOP (event, dispatch_event_queue)
+if (!user_p || command_event_p (event))
+return 1;
+/* See if there's any TTY input available.
+*/
+if (poll_fds_for_input (tty_only_mask))
+return 1;
+if (!user_p)
+{
+/* If not user_p and there are any timer or file-desc events
+	 pending, we know there will be an event so we're through. */
+XtInputMask pending_value;
+/* Note that formerly we just checked the value of XtAppPending()
+	 to determine if there was file-desc input.  This doesn't
+	 work any more with the signal_event_pipe; XtAppPending()
+	 will says "yes" in this case but there isn't really any
+	 input.  Another way of fixing this problem is for the
+	 signal_event_pipe to generate actual input in the form
+	 of an identity eval event or something. (#### maybe this
+	 actually happens?) */
+if (poll_fds_for_input (process_only_mask))
+	return 1;
+pending_value = XtAppPending (Xt_app_con);
+if (pending_value & XtIMTimer)
+	return 1;
+}
+/* XtAppPending() can be super-slow, esp. over a network connection.
+Quantify results have indicated that in some cases the
+call to detect_input_pending() completely dominates the
+running time of redisplay().  Fortunately, in a SIGIO world
+we can more quickly determine whether there are any X events:
+if an event has happened since the last time we checked, then
+a SIGIO will have happened.  On a machine with broken SIGIO,
+we'll still be in an OK state -- the sigio_happened flag
+will get set at least once a second, so we'll be no more than
+one second behind reality. (In general it's OK if we
+erroneously report no input pending when input is actually
+pending() -- preemption is just a bit less efficient, that's
+all.  It's bad bad bad if you err the other way -- you've
+promised that `next-event' won't block but it actually will,
+and some action might get delayed until the next time you
+hit a key.)
+*/
+/* quit_check_signal_tick_count is volatile so try to avoid race conditions
+by using a temporary variable */
+tick_count_val = quit_check_signal_tick_count;
+if (last_quit_check_signal_tick_count != tick_count_val)
+{
+last_quit_check_signal_tick_count = tick_count_val;
+/* We need to drain the entire queue now -- if we only
+drain part of it, we may later on end up with events
+actually pending but detect_input_pending() returning
+false because there wasn't another SIGIO. */
+drain_X_queue ();
+EVENT_CHAIN_LOOP (event, dispatch_event_queue)
+if (!user_p || command_event_p (event))
+return 1;
+}
+return 0;
+}
+/************************************************************************/
+/*            replacement for standard string-to-pixel converter        */
+/************************************************************************/
+/* This was constructed by ripping off the standard string-to-pixel
+converter from Converters.c in the Xt source code and modifying
+appropriately. */
+#if 0
+/* This is exported by the Xt library (at least by mine).  If this
+isn't the case somewhere, rename this appropriately and remove
+the '#if 0'.  Note, however, that I got "unknown structure"
+errors when I tried this. */
+XtConvertArgRec Const colorConvertArgs[] = {
+{XtWidgetBaseOffset, (XtPointer)XtOffsetOf(WidgetRec, core.screen),
+sizeof(Screen *)},
+{XtWidgetBaseOffset, (XtPointer)XtOffsetOf(WidgetRec, core.colormap),
+sizeof(Colormap)}
+};
+#endif
+#define done(type, value)               \
+if (toVal->addr != NULL) {             \
+if (toVal->size < sizeof(type)) {    \
+toVal->size = sizeof(type);        \
+return False;                      \
+}                                    \
+*(type*)(toVal->addr) = (value);     \
+} else {                               \
+static type static_val;              \
+static_val = (value);                \
+toVal->addr = (XPointer)&static_val; \
+}                                      \
+toVal->size = sizeof(type);            \
+return True /* Caller supplies `;' */
+static
+Boolean EmacsXtCvtStringToPixel (
+Display     *dpy,
+XrmValuePtr  args,
+Cardinal    *num_args,
+XrmValuePtr  fromVal,
+XrmValuePtr  toVal,
+XtPointer   *closure_ret)
+{
+String       str = (String)fromVal->addr;
+XColor       screenColor;
+XColor       exactColor;
+Screen      *screen;
+Colormap     colormap;
+Status       status;
+String       params[1];
+Cardinal     num_params  = 1;
+XtAppContext the_app_con = XtDisplayToApplicationContext (dpy);
+if (*num_args != 2) {
+XtAppWarningMsg(the_app_con, "wrongParameters", "cvtStringToPixel",
+"XtToolkitError",
+"String to pixel conversion needs screen and colormap arguments",
+(String *)NULL, (Cardinal *)NULL);
+return False;
+}
+screen   = *((Screen **)  args[0].addr);
+colormap = *((Colormap *) args[1].addr);
+/* The original uses the private function CompareISOLatin1().
+Use XmuCompareISOLatin1() if you want, but I don't think it
+makes any difference here. */
+if (strcmp(str, XtDefaultBackground) == 0) {
+*closure_ret = False;
+/* This refers to the display's "*reverseVideo" resource.
+These display resources aren't documented anywhere that
+I can find, so I'm going to ignore this. */
+/* if (pd->rv) done(Pixel, BlackPixelOfScreen(screen)) else */
+done(Pixel, WhitePixelOfScreen(screen));
+}
+if (strcmp(str, XtDefaultForeground) == 0) {
+*closure_ret = False;
+/* if (pd->rv) done(Pixel, WhitePixelOfScreen(screen)) else */
+done(Pixel, BlackPixelOfScreen(screen));
+}
+/* Originally called XAllocNamedColor() here. */
+status = XParseColor (DisplayOfScreen(screen), colormap, (char*)str,
+&screenColor);
+if (status) {
+status = allocate_nearest_color (DisplayOfScreen(screen), colormap,
+&screenColor);
+}
+if (status == 0) {
+params[0] = str;
+/* Server returns a specific error code but Xlib discards it.  Ugh */
+if (XLookupColor(DisplayOfScreen(screen), colormap, (char*)str,
+&exactColor, &screenColor)) {
+XtAppWarningMsg(the_app_con, "noColormap", "cvtStringToPixel",
+"XtToolkitError",
+"Cannot allocate colormap entry for \"%s\"",
+params, &num_params);
+} else {
+XtAppWarningMsg(the_app_con, "badValue", "cvtStringToPixel",
+"XtToolkitError",
+"Color name \"%s\" is not defined", params, &num_params);
+}
+*closure_ret = False;
+return False;
+} else {
+*closure_ret = (char*)True;
+done(Pixel, screenColor.pixel);
+}
+}
+/* ARGSUSED */
+static void EmacsFreePixel (
+XtAppContext app,
+XrmValuePtr  toVal,
+XtPointer    closure,
+XrmValuePtr  args,
+Cardinal    *num_args)
+{
+if (*num_args != 2) {
+XtAppWarningMsg(app, "wrongParameters","freePixel","XtToolkitError",
+"Freeing a pixel requires screen and colormap arguments",
+(String *)NULL, (Cardinal *)NULL);
+return;
+}
+if (closure) {
+Screen   *screen  = *((Screen **)  args[0].addr);
+Colormap colormap = *((Colormap *) args[1].addr);
+XFreeColors(DisplayOfScreen(screen), colormap,
+(unsigned long*)toVal->addr, 1, (unsigned long)0);
+}
+}
+/************************************************************************/
+/*                            initialization                            */
+/************************************************************************/
+void
+syms_of_event_Xt (void)
+{
+defsymbol (&Qkey_mapping, "key-mapping");
+}
+void
+vars_of_event_Xt (void)
+{
+dispatch_event_queue = Qnil;
+staticpro (&dispatch_event_queue);
+dispatch_event_queue_tail = Qnil;
+/* this function only makes safe calls */
+init_what_input_once ();
+Xt_event_stream =
+(struct event_stream *) xmalloc (sizeof (struct event_stream));
+Xt_event_stream->event_pending_p 	= emacs_Xt_event_pending_p;
+Xt_event_stream->next_event_cb	= emacs_Xt_next_event;
+Xt_event_stream->handle_magic_event_cb= emacs_Xt_handle_magic_event;
+Xt_event_stream->add_timeout_cb 	= emacs_Xt_add_timeout;
+Xt_event_stream->remove_timeout_cb 	= emacs_Xt_remove_timeout;
+Xt_event_stream->select_console_cb 	= emacs_Xt_select_console;
+Xt_event_stream->unselect_console_cb 	= emacs_Xt_unselect_console;
+Xt_event_stream->select_process_cb 	= emacs_Xt_select_process;
+Xt_event_stream->unselect_process_cb 	= emacs_Xt_unselect_process;
+Xt_event_stream->quit_p_cb		= emacs_Xt_quit_p;
+DEFVAR_BOOL ("modifier-keys-are-sticky", &modifier_keys_are_sticky /*
+*Non-nil makes modifier keys sticky.
+This means that you can release the modifier key before pressing down
+the key that you wish to be modified.  Although this is non-standard
+behavior, it is recommended because it reduces the strain on your hand,
+thus reducing the incidence of the dreaded Emacs-pinky syndrome.
+*/ );
+modifier_keys_are_sticky = 0;
+DEFVAR_BOOL ("x-allow-sendevents", &x_allow_sendevents /*
+*Non-nil means to allow synthetic events.  Nil means they are ignored.
+Beware: allowing emacs to process SendEvents opens a big security hole.
+*/ );
+x_allow_sendevents = 0;
+#ifdef DEBUG_XEMACS
+DEFVAR_INT ("x-debug-events", &x_debug_events /*
+If non-zero, display debug information about X events that XEmacs sees.
+Information is displayed on stderr.  Currently defined values are:
+1 == non-verbose output
+2 == verbose output
+*/ );
+x_debug_events = 0;
+#endif
+the_Xt_timeout_blocktype = Blocktype_new (struct Xt_timeout_blocktype);
+last_quit_check_signal_tick_count = 0;
+}
+void
+init_event_Xt_late (void) /* called when already initialized */
+{
+timeout_id_tick = 1;
+pending_timeouts = 0;
+completed_timeouts = 0;
+event_stream = Xt_event_stream;
+XtToolkitInitialize ();
+Xt_app_con = XtCreateApplicationContext ();
+XtAppSetFallbackResources (Xt_app_con, (String *) x_fallback_resources);
+/* In xselect.c */
+x_selection_timeout = (XtAppGetSelectionTimeout (Xt_app_con) / 1000);
+XSetErrorHandler (x_error_handler);
+XSetIOErrorHandler (x_IO_error_handler);
+XtAppAddInput (Xt_app_con, signal_event_pipe[0],
+		 (XtPointer) (XtInputReadMask /* | XtInputExceptMask */),
+		 Xt_what_callback, 0);
+XtAppSetTypeConverter (Xt_app_con, XtRString, XtRPixel,
+		         EmacsXtCvtStringToPixel,
+			 (XtConvertArgList) colorConvertArgs,
+			 2, XtCacheByDisplay, EmacsFreePixel);
+}

Mercurial > hg > xemacs-beta

comparison src/event-Xt.c @ 0:376386a54a3c r19-14