[PATCH] unicode nbsp in org-emphasis-regexp-components

[PATCH] unicode nbsp in org-emphasis-regexp-components

[Łukasz Stelmach]

Hi.

The Unicode contains a NON-BREAK SPACE character at position 0xA0. IMHO
org-mode's emphasis code should by default treat this (any other?)
character the same as normal space. When i write:

    It was a /big bang/.

I'd like the "big bang" to be put in italic especially when exported to
HTML. (I don't know if it goes properly through all the mailing systems
but I put the "\u00A0" between "a" and "/" above.)

--8<---------------cut here---------------start------------->8---
diff --git a/lisp/org.el b/lisp/org.el
index 6ea9d25..b8cd38e 100644
--- a/lisp/org.el
+++ b/lisp/org.el
@@ -3419,7 +3419,7 @@ After a match, the match groups contain these elements:
 		    "\\([" post  "]\\|$\\)")))))
 
 (defcustom org-emphasis-regexp-components
-  '(" \t('\"{" "- \t.,:!?;'\")}\\" " \t\r\n,\"'" "." 1)
+  '(" \t('\"{\u00A0" "- \t.,:!?;'\")}\\" " \t\r\n,\"'" "." 1)
   "Components used to build the regular expression for emphasis.
 This is a list with 6 entries.  Terminology:  In an emphasis string
 like \" *strong word* \", we call the initial space PREMATCH, the final
--8<---------------cut here---------------end--------------->8---

-- 
Miłego dnia,
Łukasz Stelmach

Re: [PATCH] unicode nbsp in org-emphasis-regexp-components

[Carsten Dominik]

Hi Lukasz,

I am aftraid that this will break flavors of Emacs which do not
support unicode characters, like Emacs 22.  Org-mode still supports
Emacs 22.  And I do not know how to write this in a way that it
will remaind compatible. Do you?

- Carsten

On Oct 23, 2010, at 12:39 AM, Łukasz Stelmach wrote:

> Hi.
>
> The Unicode contains a NON-BREAK SPACE character at position 0xA0.  
> IMHO
> org-mode's emphasis code should by default treat this (any other?)
> character the same as normal space. When i write:
>
>    It was a /big bang/.
>
> I'd like the "big bang" to be put in italic especially when exported  
> to
> HTML. (I don't know if it goes properly through all the mailing  
> systems
> but I put the "\u00A0" between "a" and "/" above.)
>
> --8<---------------cut here---------------start------------->8---
> diff --git a/lisp/org.el b/lisp/org.el
> index 6ea9d25..b8cd38e 100644
> --- a/lisp/org.el
> +++ b/lisp/org.el
> @@ -3419,7 +3419,7 @@ After a match, the match groups contain these  
> elements:
> 		    "\\([" post  "]\\|$\\)")))))
>
> (defcustom org-emphasis-regexp-components
> -  '(" \t('\"{" "- \t.,:!?;'\")}\\" " \t\r\n,\"'" "." 1)
> +  '(" \t('\"{\u00A0" "- \t.,:!?;'\")}\\" " \t\r\n,\"'" "." 1)
>   "Components used to build the regular expression for emphasis.
> This is a list with 6 entries.  Terminology:  In an emphasis string
> like \" *strong word* \", we call the initial space PREMATCH, the  
> final
> --8<---------------cut here---------------end--------------->8---
>
> -- 
> Miłego dnia,
> Łukasz Stelmach
>
>
> _______________________________________________
> Emacs-orgmode mailing list
> Please use `Reply All' to send replies to the list.
> Emacs-orgmode@gnu.org
> http://lists.gnu.org/mailman/listinfo/emacs-orgmode

Re: [PATCH] unicode nbsp in org-emphasis-regexp-components

[Łukasz Stelmach]

Carsten Dominik <carsten.dominik@gmail.com> writes:

> On Oct 23, 2010, at 12:39 AM, Łukasz Stelmach wrote:
>
>> The Unicode contains a NON-BREAK SPACE character at position 0xA0.
>> IMHO org-mode's emphasis code should by default treat this (any
>> other?) character the same as normal space. When i write:
>>
>>    It was a /big bang/.
>>
>> I'd like the "big bang" to be put in italic especially when exported
>> to HTML. (I don't know if it goes properly through all the mailing
>> systems but I put the "\u00A0" between "a" and "/" above.)
>>
[...]
>>
>
> I am aftraid that this will break flavors of Emacs which do not
> support unicode characters, like Emacs 22.  Org-mode still supports
> Emacs 22.  And I do not know how to write this in a way that it
> will remaind compatible. Do you?

How about simply checking the Emacs version? 

(defcustom org-emphasis-regexp-components
  (if (<= 23 (string-to-number (car (split-string emacs-version "\\."))))
      '(" \t('\"{\u00A0" "- \t.,:!?;'\")}\\" " \t\r\n,\"'" "." 1)
    '(" \t('\"{" "- \t.,:!?;'\")}\\" " \t\r\n,\"'" "." 1))
[...]

The problem with earlier version is that although most, if not all, ISO
Latin pages put `NO-BREAK SPACE' at 0xA0 some may use different
codepages. But they can do this also in newer Emacsen if they haven't
converted their files yet, can't they?

If you think putting `A0' in that regexp may break things, then I'd
suggest putting a note about it somewhere for people who'd like to
customise it for themselves.

-- 
Miłego dnia,
Łukasz Stelmach