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- ;;; iso-acc.el --- minor mode providing electric accent keys
-
- ;; Copyright (C) 1993, 1994, 1996 Free Software Foundation, Inc.
-
- ;; Author: Johan Vromans
- ;; Maintainer: FSF
- ;; Keywords: i18n
-
- ;; This file is part of GNU Emacs.
-
- ;; GNU Emacs 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 2, or (at your option)
- ;; any later version.
-
- ;; GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to the
- ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- ;; Boston, MA 02111-1307, USA.
-
- ;;; Commentary:
-
- ;; Function `iso-accents-mode' activates a minor mode in which
- ;; typewriter "dead keys" are emulated. The purpose of this emulation
- ;; is to provide a simple means for inserting accented characters
- ;; according to the ISO-8859-1 character set.
- ;;
- ;; In `iso-accents-mode', pseudo accent characters are used to
- ;; introduce accented keys. The pseudo-accent characters are:
- ;;
- ;; ' (minute) -> grave accent
- ;; ` (backtick) -> acute accent
- ;; " (second) -> diaeresis
- ;; ^ (caret) -> circumflex
- ;; ~ (tilde) -> tilde over the character
- ;; / (slash) -> slash through the character.
- ;; Also: /A is A-with-ring and /E is AE ligature.
- ;;
- ;; The action taken depends on the key that follows the pseudo accent.
- ;; In general:
- ;;
- ;; pseudo-accent + appropriate letter -> accented letter
- ;; pseudo-accent + space -> pseudo-accent
- ;; pseudo-accent + pseudo-accent -> accent (if available)
- ;; pseudo-accent + other -> pseudo-accent + other
- ;;
- ;; If the pseudo-accent is followed by anything else than a
- ;; self-insert-command, the dead-key code is terminated, the
- ;; pseudo-accent inserted 'as is' and the bell is rung to signal this.
- ;;
- ;; Function `iso-accents-mode' can be used to enable the iso accents
- ;; minor mode, or disable it.
-
- ;; If you want only some of these characters to serve as accents,
- ;; add a language to `iso-languages' which specifies the accent characters
- ;; that you want, then select the language with `iso-accents-customize'.
-
- ;;; Code:
-
- (provide 'iso-acc)
-
- (defvar iso-languages
- '(("portuguese"
- (?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
- (?C . ?\307) (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363)
- (?u . ?\372) (?c . ?\347) (?\ . ?'))
- (?` (?A . ?\300) (?a . ?\340) (?\ . ?`))
- (?^ (?A . ?\302) (?E . ?\312) (?O . ?\324) (?a . ?\342) (?e . ?\352)
- (?o . ?\364) (?\ . ?^))
- (?\" (?U . ?\334) (?u . ?\374) (?\ . ?\"))
- (?\~ (?A . ?\303) (?O . ?\325) (?a . ?\343) (?o . ?\365) (?\ . ?\~)))
-
- ("irish"
- (?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
- (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363) (?u . ?\372)
- (?\ . ?')))
-
- ("french"
- (?' (?E . ?\311) (?C . ?\307) (?e . ?\351) (?c . ?\347) (?\ . ?'))
- (?` (?A . ?\300) (?E . ?\310) (?U . ?\331)
- (?a . ?\340) (?e . ?\350) (?u . ?\371) (?\ . ?`))
- (?^ (?A . ?\302) (?E . ?\312) (?I . ?\316) (?O . ?\324) (?U . ?\333)
- (?a . ?\342) (?e . ?\352) (?i . ?\356) (?o . ?\364) (?u . ?\373)
- (?\ . ?^))
- (?\" (?E . ?\313) (?I . ?\317)
- (?e . ?\353) (?i . ?\357) (?\ . ?\"))
- (?\~ (?< . ?\253) (?> . ?\273) (?C . ?\307) (?c . ?\347) (?\ . ?\~)))
-
- ("latin-2"
- (?' (?A . ?\301) (?C . ?\306) (?D . ?\320) (?E . ?\311) (?I . ?\315)
- (?L . ?\305) (?N . ?\321) (?O . ?\323) (?R . ?\300) (?S . ?\246)
- (?U . ?\332) (?Y . ?\335) (?Z . ?\254) (?a . ?\341) (?c . ?\346)
- (?d . ?\360) (?e . ?\351) (?i . ?\355) (?l . ?\345) (?n . ?\361)
- (?o . ?\363) (?r . ?\340) (?s . ?\266) (?u . ?\372) (?y . ?\375)
- (?z . ?\274) (?' . ?\264) (?\ . ?'))
- (?` (?A . ?\241) (?C . ?\307) (?E . ?\312) (?L . ?\243) (?S . ?\252)
- (?T . ?\336) (?Z . ?\257) (?a . ?\261) (?l . ?\263) (?c . ?\347)
- (?e . ?\352) (?s . ?\272) (?t . ?\376) (?z . ?\277) (?` . ?\252)
- (?. . ?\377) (?\ . ?`))
- (?^ (?A . ?\302) (?O . ?\324) (?a . ?\342) (?o . ?\364)
- (?^ . ?^) ; no special code?
- (?\ . ?^))
- (?\" (?A . ?\304) (?E . ?\313) (?O . ?\326) (?U . ?\334) (?a . ?\344)
- (?e . ?\353) (?o . ?\366) (?s . ?\337) (?u . ?\374) (?\" . ?\250)
- (?\ . ?\"))
- (?\~ (?A . ?\303) (?C . ?\310) (?D . ?\317) (?L . ?\245) (?N . ?\322)
- (?O . ?\325) (?R . ?\330) (?S . ?\251) (?T . ?\253) (?U . ?\333)
- (?Z . ?\256) (?a . ?\323) (?c . ?\350) (?d . ?\357) (?l . ?\265)
- (?n . ?\362) (?o . ?\365) (?r . ?\370) (?s . ?\271) (?t . ?\273)
- (?u . ?\373) (?z . ?\276)
- (?v . ?\242) ; v accent
- (?\~ . ?\242) ; v accent
- (?\. . ?\270) ; cedilla accent
- (?\ . ?\~)))
-
- ("latin-1"
- (?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
- (?Y . ?\335) (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363)
- (?u . ?\372) (?y . ?\375) (?' . ?\264) (?\ . ?'))
- (?` (?A . ?\300) (?E . ?\310) (?I . ?\314) (?O . ?\322) (?U . ?\331)
- (?a . ?\340) (?e . ?\350) (?i . ?\354) (?o . ?\362) (?u . ?\371)
- (?` . ?`) (?\ . ?`))
- (?^ (?A . ?\302) (?E . ?\312) (?I . ?\316) (?O . ?\324) (?U . ?\333)
- (?a . ?\342) (?e . ?\352) (?i . ?\356) (?o . ?\364) (?u . ?\373)
- (?^ . ?^) (?\ . ?^))
- (?\" (?A . ?\304) (?E . ?\313) (?I . ?\317) (?O . ?\326) (?U . ?\334)
- (?a . ?\344) (?e . ?\353) (?i . ?\357) (?o . ?\366) (?s . ?\337)
- (?u . ?\374) (?y . ?\377) (?\" . ?\250) (?\ . ?\"))
- (?\~ (?A . ?\303) (?C . ?\307) (?D . ?\320) (?N . ?\321) (?O . ?\325)
- (?T . ?\336) (?a . ?\343) (?c . ?\347) (?d . ?\360) (?n . ?\361)
- (?o . ?\365) (?t . ?\376) (?> . ?\273) (?< . ?\253) (?\~ . ?\270)
- (?! . ?\241) (?? . ?\277)
- (?\ . ?\~))
- (?\/ (?A . ?\305) (?E . ?\306) (?O . ?\330) (?a . ?\345) (?e . ?\346)
- (?o . ?\370) (?\/ . ?\260) (?\ . ?\/))))
- "List of language-specific customizations for the ISO Accents mode.
-
- Each element of the list is of the form
-
- (LANGUAGE
- (PSEUDO-ACCENT MAPPINGS)
- (PSEUDO-ACCENT MAPPINGS)
- ...)
-
- LANGUAGE is a string naming the language.
- PSEUDO-ACCENT is a char specifying an accent key.
- MAPPINGS are cons cells of the form (CHAR . ISO-CHAR).
-
- The net effect is that the key sequence PSEUDO-ACCENT CHAR is mapped
- to ISO-CHAR on input.")
-
- (defvar iso-language nil
- "Language for which ISO Accents mode is currently customized.
- Change it with the `iso-accents-customize' function.")
-
- (defvar iso-accents-list nil
- "Association list for ISO accent combinations, for the chosen language.")
-
- (defvar iso-accents-mode nil
- "*Non-nil enables ISO Accents mode.
- Setting this variable makes it local to the current buffer.
- See the function `iso-accents-mode'.")
- (make-variable-buffer-local 'iso-accents-mode)
-
- (defvar iso-accents-enable '(?' ?` ?^ ?\" ?~ ?/)
- "*List of accent keys that become prefixes in ISO Accents mode.
- The default is (?' ?` ?^ ?\" ?~ ?/), which contains all the supported
- accent keys. If you set this variable to a list in which some of those
- characters are missing, the missing ones do not act as accents.
-
- Note that if you specify a language with `iso-accents-customize',
- that can also turn off certain prefixes (whichever ones are not needed in
- the language you choose).")
-
- (defun iso-accents-accent-key (prompt)
- "Modify the following character by adding an accent to it."
- ;; Pick up the accent character.
- (if (and iso-accents-mode
- (memq last-input-char iso-accents-enable))
- (iso-accents-compose prompt)
- (char-to-string last-input-char)))
-
- (defun iso-accents-compose (prompt)
- (let* ((first-char last-input-char)
- (list (assq first-char iso-accents-list))
- ;; Wait for the second key and look up the combination.
- (second-char (if (or prompt
- (not (eq (key-binding "a")
- 'self-insert-command))
- ;; Not at start of a key sequence.
- (> (length (this-single-command-keys)) 1)
- ;; Called from anything but the command loop.
- this-command)
- (progn
- (message "%s%c"
- (or prompt "Compose with ")
- first-char)
- (read-event))
- (insert first-char)
- (prog1 (read-event)
- (delete-region (1- (point)) (point)))))
- (entry (cdr (assq second-char list))))
- (if entry
- ;; Found it: return the mapped char
- (vector entry)
- ;; Otherwise, advance and schedule the second key for execution.
- (setq unread-command-events (list second-char))
- (vector first-char))))
-
- ;; It is a matter of taste if you want the minor mode indicated
- ;; in the mode line...
- ;; If so, uncomment the next four lines.
- ;; (or (assq 'iso-accents-mode minor-mode-map-alist)
- ;; (setq minor-mode-alist
- ;; (append minor-mode-alist
- ;; '((iso-accents-mode " ISO-Acc")))))
-
- ;;;###autoload
- (defun iso-accents-mode (&optional arg)
- "Toggle ISO Accents mode, in which accents modify the following letter.
- This permits easy insertion of accented characters according to ISO-8859-1.
- When Iso-accents mode is enabled, accent character keys
- \(`, ', \", ^, / and ~) do not self-insert; instead, they modify the following
- letter key so that it inserts an ISO accented letter.
-
- You can customize ISO Accents mode to a particular language
- with the command `iso-accents-customize'.
-
- Special combinations: ~c gives a c with cedilla,
- ~d gives an Icelandic eth (d with dash).
- ~t gives an Icelandic thorn.
- \"s gives German sharp s.
- /a gives a with ring.
- /e gives an a-e ligature.
- ~< and ~> give guillemots.
- ~! gives an inverted exclamation mark.
- ~? gives an inverted question mark.
-
- With an argument, a positive argument enables ISO Accents mode,
- and a negative argument disables it."
-
- (interactive "P")
-
- (if (if arg
- ;; Negative arg means switch it off.
- (<= (prefix-numeric-value arg) 0)
- ;; No arg means toggle.
- iso-accents-mode)
- (setq iso-accents-mode nil)
-
- ;; Enable electric accents.
- (setq iso-accents-mode t)))
-
- (defun iso-accents-customize (language)
- "Customize the ISO accents machinery for a particular language.
- It selects the customization based on the specifications in the
- `iso-languages' variable."
- (interactive (list (completing-read "Language: " iso-languages nil t)))
- (let ((table (assoc language iso-languages))
- all-accents tail)
- (if (not table)
- (error "Unknown language '%s'" language)
- (setq iso-language language
- iso-accents-list (cdr table))
- (if key-translation-map
- (substitute-key-definition
- 'iso-accents-accent-key nil key-translation-map)
- (setq key-translation-map (make-sparse-keymap)))
- ;; Set up translations for all the characters that are used as
- ;; accent prefixes in this language.
- (setq tail iso-accents-list)
- (while tail
- (define-key key-translation-map (vector (car (car tail)))
- 'iso-accents-accent-key)
- (setq tail (cdr tail))))))
-
- (defun iso-accentuate (start end)
- "Convert two-character sequences in region into accented characters.
- Noninteractively, this operates on text from START to END.
- This uses the same conversion that ISO Accents mode uses for type-in."
- (interactive "r")
- (save-excursion
- (save-restriction
- (narrow-to-region start end)
- (goto-char start)
- (forward-char 1)
- (let (entry)
- (while (< (point) end)
- (if (and (memq (preceding-char) iso-accents-enable)
- (setq entry (cdr (assq (following-char) (assq (preceding-char) iso-accents-list)))))
- (progn
- (forward-char -1)
- (delete-char 2)
- (insert entry)
- (setq end (1- end)))
- (forward-char 1)))))))
-
- (defun iso-accent-rassoc-unit (value alist)
- (let (elt acc)
- (while (and alist (not elt))
- (setq acc (car (car alist))
- elt (car (rassq value (cdr (car alist))))
- alist (cdr alist)))
- (if elt
- (cons acc elt))))
-
- (defun iso-unaccentuate (start end)
- "Convert accented characters in the region into two-character sequences.
- Noninteractively, this operates on text from START to END.
- This uses the opposite of the conversion done by ISO Accents mode for type-in."
- (interactive "r")
- (save-excursion
- (save-restriction
- (narrow-to-region start end)
- (goto-char start)
- (let (entry)
- (while (< (point) end)
- (if (and (> (following-char) 127)
- (setq entry (iso-accent-rassoc-unit (following-char)
- iso-accents-list)))
- (progn
- (delete-char 1)
- (insert (car entry) (cdr entry))
- (setq end (1+ end)))
- (forward-char 1)))))))
-
- (defun iso-deaccentuate (start end)
- "Convert accented characters in the region into unaccented characters.
- Noninteractively, this operates on text from START to END."
- (interactive "r")
- (save-excursion
- (save-restriction
- (narrow-to-region start end)
- (goto-char start)
- (let (entry)
- (while (< (point) end)
- (if (and (> (following-char) 127)
- (setq entry (iso-accent-rassoc-unit (following-char)
- iso-accents-list)))
- (progn
- (delete-char 1)
- (insert (cdr entry)))
- (forward-char 1)))))))
-
- ;; Set up the default settings.
- (iso-accents-customize "latin-1")
-
- ;; Use Iso-Accents mode in the minibuffer
- ;; if it was in use in the previous buffer.
- (defun iso-acc-minibuf-setup ()
- (setq iso-accents-mode
- (save-excursion
- (set-buffer (window-buffer minibuffer-scroll-window))
- iso-accents-mode)))
-
- (add-hook 'minibuf-setup-hook 'iso-acc-minibuf-setup)
-
- ;;; iso-acc.el ends here
-