Does the new patch look all right to you?  If there are no objections,
I will proceed with installing it.  I've been using it for a few weeks
without problems.

Lőrentey Károly <Karoly.Lorentey@cern.ch> writes:
> 2004-10-11  Károly Lőrentey  <lorentey@elte.hu>
>
>         * src/xterm.h (x_output): New member `xic_base_fontname'.
>         (FRAME_XIC_BASE_FONTNAME): New macro.
>         (xic_delete_xfontset): Declare.
>
>         * src/xfns.c (xic_create_xfontset): Share fontsets between frames
>         based on base_fontname.
>         (create_frame_xic): Set the frame's xic_base_fontname.
>         (xic_delete_xfontset): New function.
>         (free_frame_xic): Use it.  Free xic_base_fontname.
>         (xic_set_xfontset): Ditto.
>
>         * src/xterm.c (xim_destroy_callback): Ditto.
>
> *** orig/src/xfns.c
> --- mod/src/xfns.c
> ***************
> *** 1953,1959 ****
> --- 1953,1971 ----
>     char **missing_list;
>     int missing_count;
>     char *def_string;
> +   Lisp_Object rest, frame;
>   
> +   /* See if there is another frame already using same fontset. */
> +   FOR_EACH_FRAME (rest, frame)
> +     {
> +       struct frame *cf = XFRAME (frame);
> +       if (cf != f && FRAME_LIVE_P (f) && FRAME_X_P (cf)
> +           && FRAME_X_DISPLAY_INFO (cf) == FRAME_X_DISPLAY_INFO (f)
> +           && !strcmp (FRAME_XIC_BASE_FONTNAME (cf), base_fontname))
> +         return FRAME_XIC_FONTSET (cf);
> +     }
> + 
> +   /* New fontset. */
>     xfs = XCreateFontSet (FRAME_X_DISPLAY (f),
>   			base_fontname, &missing_list,
>   			&missing_count, &def_string);
> ***************
> *** 1964,1969 ****
> --- 1976,2005 ----
>     return xfs;
>   }
>   
> + /* Free the X fontset of frame F if it is the last frame using it. */
> + 
> + void
> + xic_delete_xfontset (f)
> +      struct frame *f;
> + {
> +   Lisp_Object rest, frame;
> + 
> +   if (!FRAME_XIC_FONTSET (f))
> +     return;
> + 
> +   /* See if there is another frame sharing the same fontset. */
> +   FOR_EACH_FRAME (rest, frame)
> +     {
> +       struct frame *cf = XFRAME (frame);
> +       if (cf != f && FRAME_LIVE_P (f) && FRAME_X_P (cf)
> +           && FRAME_X_DISPLAY_INFO (cf) == FRAME_X_DISPLAY_INFO (f)
> +           && FRAME_XIC_FONTSET (cf) == FRAME_XIC_FONTSET (f))
> +         return;
> +     }
> +   /* The fontset is not used anymore.  It is safe to free it. */
> +   XFreeFontSet (FRAME_X_DISPLAY (f), FRAME_XIC_FONTSET (f));
> + }
> + 
>   
>   /* Value is the best input style, given user preferences USER (already
>      checked to be supported by Emacs), and styles supported by the
> ***************
> *** 1996,2001 ****
> --- 2032,2038 ----
>     XIM xim;
>     XIC xic = NULL;
>     XFontSet xfs = NULL;
> +   char *base_fontname = NULL;
>   
>     if (FRAME_XIC (f))
>       return;
> ***************
> *** 2007,2013 ****
>         XPoint spot;
>         XVaNestedList preedit_attr;
>         XVaNestedList status_attr;
> -       char *base_fontname;
>         int fontset;
>   
>         s_area.x = 0; s_area.y = 0; s_area.width = 1; s_area.height = 1;
> --- 2044,2049 ----
> ***************
> *** 2101,2106 ****
> --- 2137,2143 ----
>     FRAME_XIC (f) = xic;
>     FRAME_XIC_STYLE (f) = xic_style;
>     FRAME_XIC_FONTSET (f) = xfs;
> +   FRAME_XIC_BASE_FONTNAME (f) = xstrdup (base_fontname);
>   }
>   
>   
> ***************
> *** 2114,2124 ****
>       return;
>   
>     XDestroyIC (FRAME_XIC (f));
> !   if (FRAME_XIC_FONTSET (f))
> !     XFreeFontSet (FRAME_X_DISPLAY (f), FRAME_XIC_FONTSET (f));
>   
>     FRAME_XIC (f) = NULL;
>     FRAME_XIC_FONTSET (f) = NULL;
>   }
>   
>   
> --- 2151,2163 ----
>       return;
>   
>     XDestroyIC (FRAME_XIC (f));
> !   xic_delete_xfontset (f);
> !   if (FRAME_XIC_BASE_FONTNAME (f))
> !     xfree (FRAME_XIC_BASE_FONTNAME (f));
>   
>     FRAME_XIC (f) = NULL;
>     FRAME_XIC_FONTSET (f) = NULL;
> +   FRAME_XIC_BASE_FONTNAME (f) = NULL;
>   }
>   
>   
> ***************
> *** 2207,2214 ****
>     XFree (attr);
>   
>     if (FRAME_XIC_FONTSET (f))
> !     XFreeFontSet (FRAME_X_DISPLAY (f), FRAME_XIC_FONTSET (f));
>     FRAME_XIC_FONTSET (f) = xfs;
>   }
>   
>   #endif /* HAVE_X_I18N */
> --- 2246,2258 ----
>     XFree (attr);
>   
>     if (FRAME_XIC_FONTSET (f))
> !     xic_delete_xfontset (f);
> ! 
> !   if (FRAME_XIC_BASE_FONTNAME (f))
> !     xfree (FRAME_XIC_BASE_FONTNAME (f));
> ! 
>     FRAME_XIC_FONTSET (f) = xfs;
> +   FRAME_XIC_BASE_FONTNAME (f) = xstrdup (base_fontname);
>   }
>   
>   #endif /* HAVE_X_I18N */
> *** orig/src/xterm.c
> --- mod/src/xterm.c
> ***************
> *** 8024,8031 ****
>   	  FRAME_XIC (f) = NULL;
>   	  if (FRAME_XIC_FONTSET (f))
>   	    {
> ! 	      XFreeFontSet (FRAME_X_DISPLAY (f), FRAME_XIC_FONTSET (f));
>   	      FRAME_XIC_FONTSET (f) = NULL;
>   	    }
>   	}
>       }
> --- 8024,8033 ----
>   	  FRAME_XIC (f) = NULL;
>   	  if (FRAME_XIC_FONTSET (f))
>   	    {
> !               xic_delete_xfontset (f);
> !               xfree (FRAME_XIC_BASE_FONTNAME (f));
>   	      FRAME_XIC_FONTSET (f) = NULL;
> + 	      FRAME_XIC_BASE_FONTNAME (f) = NULL;
>   	    }
>   	}
>       }
> *** orig/src/xterm.h
> --- mod/src/xterm.h
> ***************
> *** 593,598 ****
> --- 593,599 ----
>     XIC xic;
>     XIMStyle xic_style;
>     XFontSet xic_xfs;
> +   char *xic_base_fontname;
>   #endif
>   
>     /* Relief GCs, colors etc.  */
> ***************
> *** 727,732 ****
> --- 728,734 ----
>   #define FRAME_X_XIM_STYLES(f) (FRAME_X_DISPLAY_INFO (f)->xim_styles)
>   #define FRAME_XIC_STYLE(f) ((f)->output_data.x->xic_style)
>   #define FRAME_XIC_FONTSET(f) ((f)->output_data.x->xic_xfs)
> + #define FRAME_XIC_BASE_FONTNAME(f) ((f)->output_data.x->xic_base_fontname)
>   
>   /* Value is the smallest width of any character in any font on frame F.  */
>   
> ***************
> *** 1036,1041 ****
> --- 1038,1044 ----
>   extern unsigned char * x_encode_text P_ ((Lisp_Object, Lisp_Object, int,
>   					  int *, int *));
>   extern void x_implicitly_set_name P_ ((struct frame *, Lisp_Object, Lisp_Object));
> + extern void xic_delete_xfontset P_ ((struct frame *));
>   extern void create_frame_xic P_ ((struct frame *));
>   extern void destroy_frame_xic P_ ((struct frame *));
>   extern void xic_set_preeditarea P_ ((struct window *, int, int));

-- 
Károly