bug#3745: 23.0.95; emacs-23.0.95: unibyte-display-via-language-environment

[Kenichi Handa <handa@m17n.org>]

In article <87my7h6h81.fsf@stupidchicken.com>, Chong Yidong <cyd@stupidchicken.com> writes:

> Kenichi Handa <handa@m17n.org> writes:
> > To minimize the changes, I made the attached patch.  It
> > doesn't touch unibyte_to_multibyte_table, but introduced
> > charset_unibyte_decoder[128].  I confirmed it didn't make
> > the display code slow.

> > @@ -302,11 +298,11 @@
> >    struct charset *charset;
> >    unsigned c1;
> >  
> > +  if (c < 0x80)
> > +    return c;
> >    if (CHAR_BYTE8_P (c))
> >      return CHAR_TO_BYTE8 (c);

> You should also delete the unused `charset' and `c1' variables in this
> block.

Ah, yes.

> Other than that, these changes look good.  Thanks very much for making
> this patch, and please install on the branch ASAP.

> For the trunk, I agree that we should try using use DECODE_CHAR in
> x_produce_glyphs.

Ok, done.  I also installed this change of
reset-language-environment for completion.

--- mule-cmds.el	8 Apr 2009 18:03:17 -0000	1.360
+++ mule-cmds.el	7 Jul 2009 05:59:18 -0000	1.360.2.1
@@ -1794,6 +1794,11 @@
 	   (coding-system-error 'iso-latin-1))))
     (setq default-process-coding-system
 	  (cons output-coding input-coding)))
+  ;; Put the highest priority to the charset iso-8859-1 to prefer the
+  ;; registry iso8859-1 over iso8859-2 in font selection.  It also
+  ;; makes unibyte-display-via-language-environment to use iso-8859-1
+  ;; as the unibyte charset.
+  (set-charset-priority 'iso-8859-1)
 
   ;; Don't alter the terminal and keyboard coding systems here.
   ;; The terminal still supports the same coding system



---
Kenichi Handa
handa@m17n.org