[Found?] Re: Xkb-Extensions and XEmacs

[XEmacs-beta CC:'ed since action needs to be taken.] I just found that under an old XEmacs 20.4 (no Mule, Motif) I have lying aroung I can reproduce this, but not under 21.1-Mule-XIMMotif. I set some breakpoints (unfortunately this not a debug compile) and I think I found it. Removing the Mode_Switch keysym from the unshifted key (or replacing it by, say, find) fixed the bug. In x_event_to_emacs_event if (key_event_p) { Lisp_Object keysym; XKeyEvent *ev = &x_event->xkey; KeyCode keycode = ev->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->xkey, 0); Now x_key_is_modifier_p is defined as static int x_key_is_modifier_p (KeyCode keycode, struct device *d) { struct x_device *xd = DEVICE_X_DATA (d); KeySym *syms; int i; if (keycode < xd->x_keysym_map_min_code || keycode > xd->x_keysym_map_max_code) return 0; syms = &xd->x_keysym_map [(keycode - xd->x_keysym_map_min_code) * xd->x_keysym_map_keysyms_per_code]; 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; So 1. XEmacs explcitly considers Mode_switch a modifier key. 2. XEmacs Considers a key a modifier if ANY of its Keysyms is a modifier. So at least one of these two is wrong (or at the very least inconsistent with the rest of the X world). [time passes] I have checked in Xutil.h and it considers Mode_switch a modifier key. That means 2. is the culprit. Fix left to the reader. Jan