Fix bug #9524 with cursor positioning on display strings in truncated lines.

 src/xdisp.c (set_cursor_from_row): Don't invoke special treatment of
 truncated lines if point is covered by a display string.

2 files changed, 15 insertions, 8 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 27b7e709317..c6238701301 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2011-09-17  Eli Zaretskii  <eliz@gnu.org>
+
+        * xdisp.c (set_cursor_from_row): Don't invoke special treatment of
+        truncated lines if point is covered by a display string.  (Bug#9524)
+
 2011-09-16  Paul Eggert  <eggert@cs.ucla.edu>
 
         * xselect.c: Relax test for outgoing X longs (Bug#9498).
diff --git a/src/xdisp.c b/src/xdisp.c
index 6ba92f3ed79..864734d4b20 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -13637,15 +13637,17 @@ set_cursor_from_row (struct window *w, struct glyph_row *row,
                /* A truncated row may not include PT among its
                   character positions.  Setting the cursor inside the
                   scroll margin will trigger recalculation of hscroll
-                  in hscroll_window_tree.  */
-               || (row->truncated_on_left_p && pt_old < bpos_min)
-               || (row->truncated_on_right_p && pt_old > bpos_max)
-               /* Zero-width characters produce no glyphs.  */
+                  in hscroll_window_tree.  But if a display string
+                  covers point, defer to the string-handling code
+                  below to figure this out.  */
                || (!string_seen
-                   && !empty_line_p
-                   && (row->reversed_p
-                       ? glyph_after > glyphs_end
-                       : glyph_after < glyphs_end)))
+                   && ((row->truncated_on_left_p && pt_old < bpos_min)
+                       || (row->truncated_on_right_p && pt_old > bpos_max)
+                       /* Zero-width characters produce no glyphs.  */
+                       || (!empty_line_p
+                           && (row->reversed_p
+                               ? glyph_after > glyphs_end
+                               : glyph_after < glyphs_end)))))
         {
           cursor = glyph_after;
           x = -1;