Improve the speedup of bidi display introduced in 2011-10-18T16:56:09Z!eliz@gnu.org for bug#9771.

 src/dispextern.h (struct bidi_it): New member next_en_type.
 src/bidi.c (bidi_line_init): Initialize the next_en_type member.
 (bidi_resolve_explicit_1): When next_en_pos is valid for the
 current character, check also for next_en_type being WEAK_EN.
 (bidi_resolve_weak): Don't enter the expensive loop if the current
 position is before next_en_pos.  Record the bidi type of the first
 non-ET, non-BN character we find, in addition to its position.
 (bidi_level_of_next_char): Invalidate next_en_type when
 next_en_pos is over-stepped.

1 files changed, 13 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 36b205a120d..3f9b5beeab6 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,16 @@
+2011-10-20  Eli Zaretskii  <eliz@gnu.org>
+
+        * dispextern.h (struct bidi_it): New member next_en_type.
+
+        * bidi.c (bidi_line_init): Initialize the next_en_type member.
+        (bidi_resolve_explicit_1): When next_en_pos is valid for the
+        current character, check also for next_en_type being WEAK_EN.
+        (bidi_resolve_weak): Don't enter the expensive loop if the current
+        position is before next_en_pos.  Record the bidi type of the first
+        non-ET, non-BN character we find, in addition to its position.
+        (bidi_level_of_next_char): Invalidate next_en_type when
+        next_en_pos is over-stepped.
+
 2011-10-20  Paul Eggert  <eggert@cs.ucla.edu>
 
         Time zone name fixes for non-ASCII locales (Bug#641, Bug#9794)