(modify_overlay): Always compute unchanged info.

2 files changed, 14 insertions, 7 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index afa53ef651a..22875eaf75a 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,10 @@
+1999-12-28  Gerd Moellmann  <gerd@gnu.org>
+
+        * xdisp.c (try_window_id): Compute BEG_UNCHANGED and END_UNCHANGED
+        if MODIFF > 1.
+
+        * buffer.c (modify_overlay): Always compute unchanged info.
+
 1999-12-27  Kenichi Handa  <handa@etl.go.jp>
 
         * dispextern.h (FACE_FROM_ID): Cast the arg ID to `unsigned'.
@@ -9,10 +16,10 @@
         * lisp.h (GLYPH): Defined as `int', not `unsigned int'.  Now the
         lowest 8 bits are single byte character code, the bits above are
         face ID.
-        (GLYPH_MASK_FACE) (GLYPH_MASK_CHAR): Adjusted for the change
+        (GLYPH_MASK_FACE, GLYPH_MASK_CHAR): Adjusted for the change
         above.
-        (FAST_MAKE_GLYPH) (FSST_GLYPH_FACE): Likewise.
-        (GLYPH_MASK_REV_DIR) (GLYPH_MASK_PADDING): Macros deleted.
+        (FAST_MAKE_GLYPH, FSST_GLYPH_FACE): Likewise.
+        (GLYPH_MASK_REV_DIR, GLYPH_MASK_PADDING): Macros deleted.
 
         * charset.h (CHAR_BYTES): Use ((1 << CHARACTERBITS) - 1) instead
         of GLYPH_MASK_CHAR.
@@ -29,7 +36,7 @@
         (GLYPH_FROM_CHAR_GLYPH): Likewise.  Always return -1 for multibyte
         characters.
 
-        * dispnew.c (line_hash_code) (direct_output_for_insert): Adjusted
+        * dispnew.c (line_hash_code, direct_output_for_insert): Adjusted
         for the change of struct glyph.
         (line_draw_cost): Adjusted for the change of
         GLYPH_FROM_CHAR_GLYPH.
@@ -37,7 +44,7 @@
 
         * term.c (encode_terminal_code): Adjusted for the change of struct
         glyph and GLYPH_FROM_CHAR_GLYPH.
-        (write_glyphs) (insert_glyphs) (append_glyph): Adjusted for the
+        (write_glyphs, insert_glyphs, append_glyph): Adjusted for the
         change of struct glyph.
 
         * xdisp.c: All codes adjusted for the change of struct glyph.
diff --git a/src/buffer.c b/src/buffer.c
index 47d15e9fcf1..871a152484e 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -3088,6 +3088,8 @@ modify_overlay (buf, start, end)
       start = end; end = temp;
     }
 
+  BUF_COMPUTE_UNCHANGED (buf, start, end);
+  
   /* If this is a buffer not in the selected window,
      we must do other windows.  */
   if (buf != XBUFFER (XWINDOW (selected_window)->buffer))
@@ -3095,8 +3097,6 @@ modify_overlay (buf, start, end)
   /* If multiple windows show this buffer, we must do other windows.  */
   else if (buffer_shared > 1)
     windows_or_buffers_changed = 1;
-  else
-    BUF_COMPUTE_UNCHANGED (buf, start, end);
 
   ++BUF_OVERLAY_MODIFF (buf);
 }