Fix bug #7417 with cursor positioning on empty lines.

 xdisp.c (set_cursor_from_row): Fix cursor positioning in empty
 lines on text-mode terminals.

diff --git a/src/ChangeLog b/src/ChangeLog
index 2401551..43a38c6 100644 (file)
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2010-11-17  Eli Zaretskii  <eliz@gnu.org>
+
+       * xdisp.c (set_cursor_from_row): Fix cursor positioning in empty
+       lines on text-mode terminals.  (bug#7417)
+
 2010-11-17  Stefan Monnier  <monnier@iro.umontreal.ca>
 
        * xterm.c (get_current_wm_state): Rename from get_current_vm_state.

diff --git a/src/xdisp.c b/src/xdisp.c
index d3ebc1a..e02abf6 100644 (file)
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -12839,6 +12839,15 @@ set_cursor_from_row (struct window *w, struct glyph_row *row,
        && BUFFERP (glyph->object) && glyph->charpos == pt_old)
       && bpos_covered < pt_old)
     {
+      /* An empty line has a single glyph whose OBJECT is zero and
+        whose CHARPOS is the position of a newline on that line.
+        Note that on a TTY, there are more glyphs after that, which
+        were produced by extend_face_to_end_of_line, but their
+        CHARPOS is zero or negative.  */
+      int empty_line_p =
+       (row->reversed_p ? glyph > glyphs_end : glyph < glyphs_end)
+       && INTEGERP (glyph->object) && glyph->charpos > 0;
+
       if (row->ends_in_ellipsis_p && pos_after == last_pos)
        {
          EMACS_INT ellipsis_pos;
@@ -12875,6 +12884,7 @@ set_cursor_from_row (struct window *w, struct glyph_row *row,
               || (row->truncated_on_right_p && pt_old > bpos_max)
               /* Zero-width characters produce no glyphs.  */
               || (!string_seen
+                  && !empty_line_p
                   && (row->reversed_p
                       ? glyph_after > glyphs_end
                       : glyph_after < glyphs_end)))