(redisplay_window): Fix computing pos from last_point.

diff --git a/src/xdisp.c b/src/xdisp.c
index 95024e79c4aab48393a785e92ad86c6e281ea94d..dfc64cb1ff76eacd76330ed23e54c500a5ff875d 100644 (file)
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -2033,14 +2033,16 @@ redisplay_window (window, just_this_one, preserve_echo_area)
        {
          int last_point = XFASTINT (w->last_point);
          int last_point_byte = CHAR_TO_BYTE (last_point);
+         int tab_offset = (pos_tab_offset (w, last_point, last_point_byte)
+                           - (last_point_x + hscroll - !! hscroll));
 
          pos = *compute_motion (last_point, last_point_y, last_point_x, 0,
                                 PT, height,
-                                /* BUG FIX: See the comment of
+                                /* BUG FIX: See the comment of 
                                    Fpos_visible_in_window_p (window.c).  */
                                 - (1 << (BITS_PER_SHORT - 1)),
                                 width, hscroll,
-                                pos_tab_offset (w, last_point, last_point_byte),
+                                tab_offset,
                                 w);
        }
       else
@@ -3048,9 +3050,10 @@ fix_glyph (f, glyph, cface)
 }
 \f
 /* Return the column of position POS / POS_BYTE in window W's buffer.
-   The result is rounded down to a multiple of the internal width of W.
-   This is the amount of indentation of position POS
-   that is not visible in its horizontal position in the window.  */
+   When used on the character at the beginning of a line,
+   starting at column 0, this says how much to subtract from
+   the column position of any character in the line
+   to get its horizontal position on the screen.  */
 
 static int
 pos_tab_offset (w, pos, pos_byte)