Retrospective commit from 2009-10-08.

Finish up working on paragraph's base direction.
Start working on display of right-to-left glyph rows.
Rewrite set_cursor_from_row to support bidi.

 xdisp.c (string_buffer_position_lim): New function.
 (string_buffer_position): Most of code moved to
 string_buffer_position_lim.  Last argument and return value are
 now EMACS_INT; all callers changed.
 (set_cursor_from_row): Rewritten to support bidirectional text and
 reversed glyph rows.
 dispextern.h <string_buffer_position>: Update prototype.
 bidi.c (bidi_paragraph_init): Fix initialization of POS.
 dispextern.h (struct glyph_row): New member reversed_p.
 buffer.c (syms_of_buffer): Remove DEFVAR_LISP_NOPRO for
 default-direction-reversed, default-bidi-display-reordering, and
 default-paragraph-direction.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/buffer.h b/src/buffer.h
index 205bf865879..b3f131a46c1 100644
--- a/src/buffer.h
+++ b/src/buffer.h
@@ -664,9 +664,9 @@ struct buffer
   /* Non-nil means set beginning of lines at the right edge of
      windows.  */
   Lisp_Object direction_reversed;
-  /* If non-nil, specifies which direction of text to force in each
-     paragraph.  Nil means determine paragraph direction dynamically
-     for each paragraph.  */
+  /* If non-nil, specifies which direction of text to force in all the
+     paragraphs of the buffer.  Nil means determine paragraph
+     direction dynamically for each paragraph.  */
   Lisp_Object paragraph_direction;
   /* Non-nil means do selective display;
      see doc string in syms_of_buffer (buffer.c) for details.  */