From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christian Moe <mail@christianmoe.com>
Subject: Re: text color + highlight
Date: Tue, 10 Aug 2010 20:38:45 +0200
Message-ID: <4C619CB5.70409@christianmoe.com>
References: <AANLkTin7P3xa5bWrTUdRJkUqtMYS+0jy+n7ztHB-640Y@mail.gmail.com>	<87pqxw5cb1.fsf@gnu.org>	<AANLkTikF_BOrjHFfFNEPRA0n+TM6DR8rpuTCThvTp-j4@mail.gmail.com>	<87mxszcsuv.fsf@gmail.com>	<AANLkTimooXhPwAb4TMaBHejNonmnMB+T9EHPSs4Z0=Bh@mail.gmail.com>	<87d3tvru38.fsf@gmail.com>	<AANLkTinvbFrdzjoA7E4UwZ+feG9L+_VYJPh-KZcRPQEv@mail.gmail.com>	<87iq3kkef1.fsf@gmail.com>	<C796B0EE-21B7-43B0-B7F7-BB259CA647A0@gmail.com>	<4C60EE48.6030106@christianmoe.com>	<532CED92-88AD-46F6-BC67-9D0DEDAA6D71@gmail.com>	<4C611C24.2030601@christianmoe.com>
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To: Eric Schulte <schulte.eric@gmail.com>
Cc: emacs-orgmode@gnu.org

Hi, Eric,

Thanks for trying this out -- I should have taken the trouble to write 
out sample code myself.

> Just for completeness I'm adding an example of a color handler which can
> be added to a users config to enable colorization of exported text to
> html and latex.
> 
> --8<---------------cut here---------------start------------->8---
> (org-add-link-type
>  "color" nil
>  (lambda (path desc format)
>    (cond
>     ((eq format 'html)
>      (format "<span style=\"color:%s;\">%s</span>" path desc))
>     ((eq format 'latex)
>      (format "{\\color{%s}%s}" path desc)))))
> --8<---------------cut here---------------end--------------->8---
> 

A drawback with using links for markup is that the user sees things that 
look like links, but do nothing when clicked, except give error messages.

So instead of setting the third argument -- the "follow" function -- to 
nil, I'd flash the user an informative message, e.g.

--8<---------------cut here---------------start------------->8---
(org-add-link-type
  "color"
  (lambda (path)
    (message
     (format "This link adds %s color but goes nowhere" path)))
  (lambda (path desc format)
    (cond
     ((eq format 'html)
      (format "<span style=\"color:%s;\">%s</span>" path desc))
     ((eq format 'latex)
      (format "{\\color{%s}%s}" path desc)))))
--8<---------------cut here---------------end--------------->8---


Yours,
Christian