Unicode Characters for Checkbox in Orgmode-Exported HTML

<2014-05-23 Fri>

Now in orgmode we can set org-html-checkbox-type to unicode (by code (setq org-html-checkbox-type 'unicode) ) to turn

• [X] into ☑ for checked checkbox
• [ ] into ☐ for unchecked checkbox
• and [-] into ☐ for partial-checked checkbox(in `Trans` status).

These unicode symbols are nearly perfect but the one for the partial-checked checkbox ―― It's the same as the one for unchecked checkbox.

So I searched the internet and find this unicode character table. After checking symbols in it one by one, I found three symbols for the three status of checkbox, like this:

• ⊠ checked one
• ◻ unchecked one
• ⊡ partial-checked one
  • ◻ unchecked one
  • ⊠ checked one

And here is the old style, for comparing:

• ☑ checked one
• ☐ unchecked one
• ☐ partial-checked one
  • ☐ unchecked one
  • ☑ checked one

I donno whether other ones think that these symbols are better, so I changed these characters through defadvice:

(defun unicode-for-org-html-checkbox (checkbox)
  "Format CHECKBOX into Unicode Characters."
  (case checkbox (on "⊠")
        (off "◻")
        (trans "⊡")
        (t "")))
(defadvice org-html-checkbox (around unicode-checkbox activate)
  (setq ad-return-value (unicode-for-org-html-checkbox (ad-get-arg 0))))