Fix bug #9530 on a TTY.

 src/xdisp.c (display_line): Record maximum and minimum buffer
 positions even if no glyphs were produced (e.g., by a zero-width
 stretch).  Fixes bug#9530 on a TTY.  Under word-wrap, don't record
 buffer positions that will be removed from the glyph row because
 they don't fit.

2 files changed, 19 insertions, 5 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index e5962fa8fed..09ac0d78e73 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,11 @@
+2011-09-18  Eli Zaretskii  <eliz@gnu.org>
+
+        * xdisp.c (display_line): Record maximum and minimum buffer
+        positions even if no glyphs were produced (e.g., by a zero-width
+        stretch).  Fixes bug#9530 on a TTY.  Under word-wrap, don't record
+        buffer positions that will be removed from the glyph row because
+        they don't fit.
+
 2011-09-18  YAMAMOTO Mitsuharu  <mituharu@math.s.chiba-u.ac.jp>
 
         * xdisp.c (expose_window): Save original value of phys_cursor_on_p
diff --git a/src/xdisp.c b/src/xdisp.c
index 921a332fdc6..b2859d0767b 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -18704,11 +18704,6 @@ display_line (struct it *it)
                       it->current_x = new_x;
                       it->continuation_lines_width += new_x;
                       ++it->hpos;
-                      /* Record the maximum and minimum buffer
-                         positions seen so far in glyphs that will be
-                         displayed by this row.  */
-                      if (it->bidi_p)
-                        RECORD_MAX_MIN_POS (it);
                       if (i == nglyphs - 1)
                         {
                           /* If line-wrap is on, check if a previous
@@ -18723,6 +18718,11 @@ display_line (struct it *it)
                                   || IT_DISPLAYING_WHITESPACE (it)))
                             goto back_to_wrap;
 
+                          /* Record the maximum and minimum buffer
+                             positions seen so far in glyphs that will be
+                             displayed by this row.  */
+                          if (it->bidi_p)
+                            RECORD_MAX_MIN_POS (it);
                           set_iterator_to_next (it, 1);
                           if (IT_OVERFLOW_NEWLINE_INTO_FRINGE (it))
                             {
@@ -18740,6 +18740,8 @@ display_line (struct it *it)
                                 }
                             }
                         }
+                      else if (it->bidi_p)
+                        RECORD_MAX_MIN_POS (it);
                     }
                   else if (CHAR_GLYPH_PADDING_P (*glyph)
                            && !FRAME_WINDOW_P (it->f))
@@ -18870,6 +18872,10 @@ display_line (struct it *it)
                   xassert (it->first_visible_x <= it->last_visible_x);
                 }
             }
+          /* Even if this display element produced no glyphs at all,
+             we want to record its position.  */
+          if (it->bidi_p && nglyphs == 0)
+            RECORD_MAX_MIN_POS (it);
 
           row->ascent = max (row->ascent, it->max_ascent);
           row->height = max (row->height, it->max_ascent + it->max_descent);