Re: [PATCH] Emacs should check font width also when spacing is dual

[Naohiro Aota]

Chong Yidong <address@hidden> writes:

> Naohiro Aota <address@hidden> writes:
>
>> Current behavior causes tab width to be doubled and so indent to be
>> strange.
>
> I don't see any strange behavior.  (Tabs are displayed specially in
> Emacs, so I don't know how you're viewing them.)  Please provide a
> reproducible test case.

Using fonts whose spacing is DUAL cause the problem.  M+ font is one of
them. (1)

--8<---------------cut here---------------start------------->8---
12345678901234567890
        <-tab
(add-hook 'after-save-hook
          (function (lambda ()
                      (if (string= (expand-file-name "~/.emacs.el")
                                   (buffer-file-name))
                          (save-excursion
                            (byte-compile-file "~/.emacs.el"))))))
--8<---------------cut here---------------end--------------->8---

(unpatched) emacs -q -fn "M+ 1m", open <above file>

same file with firefox

same file with patched emacs

(1) http://mplus-fonts.sourceforge.jp/mplus-outline-fonts/index-en.html