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|
;;; markchars.el --- Mark chars fitting certain characteristics
;;
;; Author: Lennart Borgman (lennart O borgman A gmail O com)
;; Created: 2010-03-22 Mon
;; Version:
;; Last-Updated: 2010-03-25 Thu
;; URL:
;; Keywords:
;; Compatibility:
;;
;; Features that might be required by this library:
;;
;; Required feature `markchars' was not provided.
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;;; Commentary:
;;
;; Mark special chars, by default non-ascii, non-IDN chars. See
;; `markchars-mode'.
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;;; Change log:
;;
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the GNU General Public License as
;; published by the Free Software Foundation; either version 3, or
;; (at your option) any later version.
;;
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;; General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with this program; see the file COPYING. If not, write to
;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth
;; Floor, Boston, MA 02110-1301, USA.
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;;; Code:
(require 'idn)
;;;###autoload
(defgroup markchars nil
"Customization group for `markchars-mode'."
:group 'convenience)
(defface markchars-light
'((t (:underline "light blue")))
"Light face for `markchars-mode' char marking."
:group 'markchars)
(defface markchars-heavy
'((t (:underline "magenta")))
"Heavy face for `markchars-mode' char marking."
:group 'markchars)
(defcustom markchars-face 'markchars-heavy
"Pointer to face used for marking chars."
:type 'face
:group 'markchars)
;; (markchars-nonidn-fun (point-max))
;; åäö
;; character: å (229, #o345, #xe5)
;; (idn-is-recommended 229) => t
;; 152F ; 00B7 0034 ; SL # ( ᔯ → ·4 ) CANADIAN SYLLABICS YWE → MIDDLE DOT, DIGIT FOUR # {source:835} ᐧ4 {[source:696]}
(defun markchars-nonidn-fun (bound)
"Font lock matcher for non-IDN, non-ascii chars."
(let* ((beg (catch 'beg
(while (< (point) bound)
(let ((char (char-after)))
(unless (or (< char 256)
(idn-is-recommended char))
(throw 'beg (point)))
(forward-char)))))
(end (when beg
(catch 'end
(while (< (point) bound)
(let ((char (char-after (point))))
(when (or (< char 256)
(idn-is-recommended char))
(throw 'end (point)))
(forward-char)))))))
(when beg
(setq end (or end bound))
(set-match-data (list (copy-marker beg) (copy-marker end)))
t)))
(defcustom markchars-keywords (or (when (fboundp 'idn-is-recommended) 'markchars-nonidn-fun)
"[[:nonascii:]]+")
"Regexp or function for font lock to use for characters to mark.
By default it matches non-IDN, non-ascii chars."
:type '(choice (const :tag "Non-ascii chars" "[[:nonascii:]]+")
(const :tag "Non IDN chars (Unicode.org tr39 suggestions)" markchars-nonidn-fun))
:group 'markchars)
(defvar markchars-used-keywords nil
"Keywords currently used for font lock.")
(put 'markchars-used-keywords 'permanent-local t)
(defun markchars-set-keywords ()
"Set `markchars-used-keywords' from options."
(set (make-local-variable 'markchars-used-keywords)
(list
(list markchars-keywords
(list 0 '(put-text-property (match-beginning 0) (match-end 0)
'face markchars-face))))))
;;;###autoload
(define-minor-mode markchars-mode
"Mark special characters.
Which characters to mark are defined by `markchars-keywords'.
The default is to mark non-IDN, non-ascii chars with a magenta
underline.
For information about IDN chars see `idn-is-recommended'.
If you change anything in the customization group `markchars' you
must restart this minor mode for the changes to take effect."
:group 'markchars
:lighter " ø"
(if markchars-mode
(progn
(markchars-set-keywords)
(font-lock-add-keywords nil markchars-used-keywords))
(font-lock-remove-keywords nil markchars-used-keywords))
;; Fix-me: Something like mumamo-mark-for-refontification should be in Emacs.
(if (fboundp 'mumamo-mark-for-refontification)
(save-restriction
(widen)
(mumamo-mark-for-refontification (point-min) (point-max)))
(font-lock-fontify-buffer)))
;;;###autoload
(define-globalized-minor-mode markchars-global-mode markchars-mode
(lambda () (markchars-mode 1))
:group 'markchars)
(provide 'markchars)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; markchars.el ends here
|
