Improve display of columns on mode-line

* src/xdisp.c (decode_mode_spec): A better representation for
"unknown column number".

diff --git a/src/xdisp.c b/src/xdisp.c
index c73958854cd3d1f330abb06cfeabdd22f5b2f526..add14a084fce6aa6d7a7580b55ca443a31908416 100644 (file)
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -27620,10 +27620,20 @@ decode_mode_spec (struct window *w, register int c, int field_width,
          even crash emacs.)  */
       if (mode_line_target == MODE_LINE_TITLE)
        return "";
+      else if (b->long_line_optimizations_p)
+       {
+         char *p = decode_mode_spec_buf;
+         int pad = width - 2;
+         while (pad-- > 0)
+           *p++ = ' ';
+         *p++ = '?';
+         *p++ = '?';
+         *p = '\0';
+         return decode_mode_spec_buf;
+       }
       else
        {
-         ptrdiff_t col =
-           b->long_line_optimizations_p ? 0 : current_column ();
+         ptrdiff_t col = current_column ();
          int disp_col = (c == 'C') ? col + 1 : col;
          w->column_number_displayed = col;
          pint2str (decode_mode_spec_buf, width, disp_col);