(select_frame_for_redisplay): New function.

(redisplay_internal): Record also selected_frame for
unwind_redisplay.  Call select_frame_for_redisplay before
redrawing each frame.
(unwind_redisplay): Argument changed to a cons.

2 files changed, 64 insertions, 4 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index c2479787636..0ada3fd087c 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,11 @@
+2003-11-13  Kenichi Handa  <handa@m17n.org>
+
+        * xdisp.c (select_frame_for_redisplay): New function.
+        (redisplay_internal): Record also selected_frame for
+        unwind_redisplay.  Call select_frame_for_redisplay before
+        redrawing each frame.
+        (unwind_redisplay): Argument changed to a cons.
+
 2003-11-12  Luc Teirlinck  <teirllm@auburn.edu>
 
         * fns.c (Fstring_to_multibyte): Doc fix.
diff --git a/src/xdisp.c b/src/xdisp.c
index e85589d56d1..e1b13323255 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -814,6 +814,7 @@ static int message_log_check_duplicate P_ ((int, int, int, int));
 static void push_it P_ ((struct it *));
 static void pop_it P_ ((struct it *));
 static void sync_frame_with_window_matrix_rows P_ ((struct window *));
+static void select_frame_for_redisplay P_ ((Lisp_Object));
 static void redisplay_internal P_ ((int));
 static int echo_area_display P_ ((int));
 static void redisplay_windows P_ ((Lisp_Object));
@@ -9542,6 +9543,44 @@ reconsider_clip_changes (w, b)
     }
 }
 
+
+/* Select FRAME to forward the values of frame-local variables into C
+   variables so that the redisplay routines can access those values
+   directly.  */
+
+static void
+select_frame_for_redisplay (frame)
+     Lisp_Object frame;
+{
+  Lisp_Object tail, sym, val;
+  Lisp_Object old = selected_frame;
+  
+  selected_frame = frame;
+
+  for (tail = XFRAME (frame)->param_alist; CONSP (tail); tail = XCDR (tail))
+    if (CONSP (XCAR (tail))
+        && (sym = XCAR (XCAR (tail)),
+            SYMBOLP (sym))
+        && (sym = indirect_variable (sym),
+            val = SYMBOL_VALUE (sym),
+            (BUFFER_LOCAL_VALUEP (val)
+             || SOME_BUFFER_LOCAL_VALUEP (val)))
+        && XBUFFER_LOCAL_VALUE (val)->check_frame)
+      Fsymbol_value (sym);
+
+  for (tail = XFRAME (old)->param_alist; CONSP (tail); tail = XCDR (tail))
+    if (CONSP (XCAR (tail))
+        && (sym = XCAR (XCAR (tail)),
+            SYMBOLP (sym))
+        && (sym = indirect_variable (sym),
+            val = SYMBOL_VALUE (sym),
+            (BUFFER_LOCAL_VALUEP (val)
+             || SOME_BUFFER_LOCAL_VALUEP (val)))
+        && XBUFFER_LOCAL_VALUE (val)->check_frame)
+      Fsymbol_value (sym);
+}
+
+
 #define STOP_POLLING                                    \
 do { if (! polling_stopped_here) stop_polling ();       \
        polling_stopped_here = 1; } while (0)
@@ -9607,7 +9646,8 @@ redisplay_internal (preserve_echo_area)
   /* Record a function that resets redisplaying_p to its old value
      when we leave this function.  */
   count = SPECPDL_INDEX ();
-  record_unwind_protect (unwind_redisplay, make_number (redisplaying_p));
+  record_unwind_protect (unwind_redisplay,
+                         Fcons (make_number (redisplaying_p), selected_frame));
   ++redisplaying_p;
   specbind (Qinhibit_free_realized_faces, Qnil);
 
@@ -10021,6 +10061,11 @@ redisplay_internal (preserve_echo_area)
 
           if (FRAME_WINDOW_P (f) || f == sf)
             {
+              if (! EQ (frame, selected_frame))
+                /* Select the frame, for the sake of frame-local
+                   variables.  */
+                select_frame_for_redisplay (frame);
+
 #ifdef HAVE_WINDOW_SYSTEM
               if (clear_face_cache_count % 50 == 0
                   && FRAME_WINDOW_P (f))
@@ -10273,13 +10318,20 @@ redisplay_preserve_echo_area (from_where)
 /* Function registered with record_unwind_protect in
    redisplay_internal.  Reset redisplaying_p to the value it had
    before redisplay_internal was called, and clear
-   prevent_freeing_realized_faces_p.  */
+   prevent_freeing_realized_faces_p.  It also selects the previously
+   selected frame.  */
 
 static Lisp_Object
-unwind_redisplay (old_redisplaying_p)
-     Lisp_Object old_redisplaying_p;
+unwind_redisplay (val)
+     Lisp_Object val;
 {
+  Lisp_Object old_redisplaying_p, old_frame;
+
+  old_redisplaying_p = XCAR (val);
   redisplaying_p = XFASTINT (old_redisplaying_p);
+  old_frame = XCDR (val);
+  if (! EQ (old_frame, selected_frame))
+    select_frame_for_redisplay (old_frame);
   return Qnil;
 }