Fix current-bidi-paragraph-direction wrt window pointer.

 src/xdisp.c (compute_display_string_pos): When W is NULL, use the current
 buffer as the object to pass to get-char-property.
 (Fcurrent_bidi_paragraph_direction): Assign NULL to the window
 pointer member of the bidi iterator, since no window is pertinent
 to this function.

2 files changed, 10 insertions, 3 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 06b738e5043..94c5f76a76d 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -3,6 +3,11 @@
         * xdisp.c (get_it_property): If it->object is a buffer, pass to
         get-char-property the window that is being rendered, instead of
         the buffer, to support window-specific overlays.  (Bug#14575)
+        (compute_display_string_pos): When W is NULL, use the current
+        buffer as the object to pass to get-char-property.
+        (Fcurrent_bidi_paragraph_direction): Assign NULL to the window
+        pointer member of the bidi iterator, since no window is pertinent
+        to this function.
 
 2013-06-08  Eli Zaretskii  <eliz@gnu.org>
 
diff --git a/src/xdisp.c b/src/xdisp.c
index 2097929128b..5edd4bbbc5f 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -3509,9 +3509,8 @@ compute_display_string_pos (struct text_pos *position,
 
   if (string && STRINGP (string->lstring))
     object1 = object = string->lstring;
-  else if (!string_p)
+  else if (w && !string_p)
     {
-      eassert (w != NULL);
       XSETWINDOW (object, w);
       object1 = Qnil;
     }
@@ -20013,7 +20012,10 @@ See also `bidi-paragraph-direction'.  */)
       itb.string.lstring = Qnil;
       itb.string.bufpos = 0;
       itb.string.unibyte = 0;
-      itb.w = XWINDOW (selected_window);
+      /* We have no window to use here for ignoring window-specific
+         overlays.  Using NULL for window pointer will cause
+         compute_display_string_pos to use the current buffer.  */
+      itb.w = NULL;
       bidi_paragraph_init (NEUTRAL_DIR, &itb, 1);
       bidi_unshelve_cache (itb_data, 0);
       set_buffer_temp (old);