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