*** diff-old/src/xfns.c	2004-10-11 00:24:05.000000000 +0200
--- diff-new/src/xfns.c	2004-10-11 00:18:09.000000000 +0200
***************
*** 1953,1959 ****
--- 1953,1970 ----
    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)
+           && !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 ****
--- 1975,2003 ----
    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_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
***************
*** 2101,2106 ****
--- 2135,2141 ----
    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;
  }
  
  
--- 2149,2161 ----
      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 */
--- 2244,2256 ----
    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 */