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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: Alexandre Oliva <oliva@dcc.unicamp.br>
- ;; Keywords: i18n
- ;; $Revision: 1.15 $
- ;; $Date: 1997/07/04 22:10:32 $
-
- ;; 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 and other character sets.
- ;;
- ;; 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.
- ;; . (dot) -> dot over the character
- ;; , (cedilla) -> cedilla under the character (some languages only)
- ;;
- ;; 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 (except comma)
- ;; 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)
-
- ;; multiple Emacs versions compatibility section
-
- (if (fboundp 'make-char)
- (defun iso-make-char (charset char)
- (cond
- ((integerp char) (make-char charset char))
- ((and (char-or-string-p char) (not (stringp char))) char)
- (t (error "invalid character"))))
- (defun iso-make-char (charset char) "Returns its second argument" char))
-
- (if (fboundp 'read-event)
- (defalias 'iso-read-event 'read-event)
- (defun iso-read-event ()
- (event-key (next-command-event))))
-
- (if (fboundp 'character-to-event)
- (progn
- (defun iso-char-list-to-event (l)
- "returns an event containing the given list of characters"
- (character-to-event l))
- (defun iso-char-to-event (ch)
- "returns an event containing the given character"
- (iso-char-list-to-event (list ch))))
- (defalias 'iso-char-to-event 'identity)
- (defalias 'iso-char-list-to-event 'identity))
-
- (if (fboundp 'this-single-command-keys) ()
- (if (string-match "Lucid" (version))
- (defun this-single-command-keys ()
- (setq this-command (not (this-command-keys)))
- (this-command-keys))
- (defun this-single-command-keys () (this-command-keys))))
-
- ;; end of compatibility section
-
- (defvar iso-languages
- '(("catalan"
- ;; Note this includes some extra characters used in Spanish,
- ;; on the idea that someone who uses Catalan is likely to use Spanish
- ;; as well.
- (?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
- (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363) (?u . ?\372)
- (?\ . ?'))
- (?` (?A . ?\300) (?E . ?\310) (?O . ?\322)
- (?a . ?\340) (?e . ?\350) (?o . ?\362) (?\ . ?`))
- (?\" (?I . ?\317) (?U . ?\334) (?i . ?\357) (?u . ?\374) (?\ . ?\"))
- (?~ (?C . ?\307) (?N . ?\321) (?c . ?\347) (?n . ?\361)
- (?> . ?\273) (?< . ?\253) (?! . ?\241) (?? . ?\277)
- (?\ . ?~)))
-
- ("esperanto"
- (?^ (?H . ?\246) (?J . ?\254) (?h . ?\266) (?j . ?\274) (?C . ?\306)
- (?G . ?\330) (?S . ?\336) (?c . ?\346) (?g . ?\370) (?s . ?\376)
- (?^ . ?^) (?\ . ?^))
- (?~ (?U . ?\335) (?u . ?\375) (?\ . ?~)))
-
- ("french"
- (?' (?E . ?\311) (?C . ?\307)
- (?e . ?\351) (?c . ?\347)
- (?\ . ?') (space . ?'))
- (?` (?A . ?\300) (?E . ?\310) (?U . ?\331)
- (?a . ?\340) (?e . ?\350) (?u . ?\371)
- (?\ . ?`) (space . ?`))
- (?^ (?A . ?\302) (?E . ?\312) (?I . ?\316) (?O . ?\324) (?U . ?\333)
- (?a . ?\342) (?e . ?\352) (?i . ?\356) (?o . ?\364) (?u . ?\373)
- (?\ . ?^) (space . ?^))
- (?\" (?E . ?\313) (?I . ?\317)
- (?e . ?\353) (?i . ?\357)
- (?\ . ?\") (space . ?\"))
- (?~ (?< . ?\253) (?> . ?\273)
- (?C . ?\307) (?c . ?\347)
- (?\ . ?~) (space . ?~))
- (?, (?c . ?\347) (?C . ?\307) (?, . ?,)))
-
- ("german"
- (?\" (?A . ?\304) (?O . ?\326) (?U . ?\334)
- (?a . ?\344) (?o . ?\366) (?u . ?\374) (?s . ?\337) (?\ . ?\")))
-
- ("irish"
- (?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
- (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363) (?u . ?\372)
- (?\ . ?') (space . ?')))
-
- ("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) (?\ . ?') (space . ?'))
- (?` (?A . ?\300) (?a . ?\340) (?\ . ?`) (space . ?`))
- (?^ (?A . ?\302) (?E . ?\312) (?O . ?\324) (?a . ?\342) (?e . ?\352)
- (?o . ?\364) (?\ . ?^) (space . ?^))
- (?\" (?U . ?\334) (?u . ?\374) (?\ . ?\") (space . ?\"))
- (?~ (?A . ?\303) (?O . ?\325)
- (?a . ?\343) (?o . ?\365)
- (?\ . ?~) (space . ?~))
- (?, (?c . ?\347) (?C . ?\307) (?, . ?,)))
-
- ("spanish"
- (?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
- (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363) (?u . ?\372)
- (?\ . ?'))
- (?\" (?U . ?\334) (?u . ?\374) (?\ . ?\"))
- (?~ (?N . ?\321) (?n . ?\361) (?> . ?\273) (?< . ?\253) (?! . ?\241)
- (?? . ?\277) (?\ . ?~)))
-
- ("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) (?\ . ?') (space . ?'))
- (?` (?A . ?\300) (?E . ?\310) (?I . ?\314) (?O . ?\322) (?U . ?\331)
- (?a . ?\340) (?e . ?\350) (?i . ?\354) (?o . ?\362) (?u . ?\371)
- (?` . ?`) (?\ . ?`) (space . ?`))
- (?^ (?A . ?\302) (?E . ?\312) (?I . ?\316) (?O . ?\324) (?U . ?\333)
- (?a . ?\342) (?e . ?\352) (?i . ?\356) (?o . ?\364) (?u . ?\373)
- (?^ . ?^) (?\ . ?^) (space . ?^))
- (?\" (?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) (?\ . ?\") (space . ?\"))
- (?~ (?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)
- (?\ . ?~) (space . ?~))
- (?/ (?A . ?\305) (?E . ?\306) (?O . ?\330) (?a . ?\345) (?e . ?\346)
- (?o . ?\370) (?/ . ?\260) (?\ . ?/) (space . ?/)))
-
- ("latin-2" latin-iso8859-2
- (?' (?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) (?\ . ?') (space . ?'))
- (?` (?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) (?\ . ?`) (space . ?`))
- (?^ (?A . ?\302) (?I . ?\316) (?O . ?\324)
- (?a . ?\342) (?i . ?\356) (?o . ?\364)
- (?^ . ?^) ; no special code?
- (?\ . ?^) (space . ?^))
- (?\" (?A . ?\304) (?E . ?\313) (?O . ?\326) (?U . ?\334)
- (?a . ?\344) (?e . ?\353) (?o . ?\366) (?s . ?\337) (?u . ?\374)
- (?\" . ?\250)
- (?\ . ?\") (space . ?\"))
- (?~ (?A . ?\303) (?C . ?\310) (?D . ?\317) (?L . ?\245) (?N . ?\322)
- (?O . ?\325) (?R . ?\330) (?S . ?\251) (?T . ?\253) (?U . ?\333)
- (?Z . ?\256)
- (?a . ?\343) (?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
- (?\ . ?~) (space . ?~)))
-
- ("latin-3" latin-iso8859-3
- (?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
- (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363) (?u . ?\372)
- (?' . ?\264) (?\ . ?') (space . ?'))
- (?` (?A . ?\300) (?E . ?\310) (?I . ?\314) (?O . ?\322) (?U . ?\331)
- (?a . ?\340) (?e . ?\350) (?i . ?\354) (?o . ?\362) (?u . ?\371)
- (?` . ?`) (?\ . ?`) (space . ?`))
- (?^ (?A . ?\302) (?C . ?\306) (?E . ?\312) (?G . ?\330)
- (?H . ?\246) (?I . ?\316) (?J . ?\254) (?O . ?\324)
- (?S . ?\336) (?U . ?\333)
- (?a . ?\342) (?c . ?\346) (?e . ?\352) (?g . ?\370) (?h . ?\266)
- (?i . ?\356) (?j . ?\274) (?o . ?\364) (?s . ?\376) (?u . ?\373)
- (?^ . ?^) (?\ . ?^) (space . \^))
- (?\" (?A . ?\304) (?E . ?\313) (?I . ?\317) (?O . ?\326) (?U . ?\334)
- (?a . ?\344) (?e . ?\353) (?i . ?\357) (?o . ?\366) (?u . ?\374)
- (?s . ?\337)
- (?\" . ?\250) (?\ . ?\") (space . ?\"))
- (?. (?C . ?\305) (?G . ?\325) (?I . ?\251) (?Z . ?\257)
- (?c . ?\345) (?g . ?\365) (?z . ?\277))
- (?~ (?A . ?\303) (?C . ?\307) (?D . ?\320) (?G . ?\253) (?N . ?\321)
- (?O . ?\325) (?S . ?\252) (?U . ?\335)
- (?a . ?\343) (?c . ?\347) (?d . ?\360) (?g . ?\273) (?n . ?\361)
- (?o . ?\365) (?s . ?\252) (?u . ?\375)
- (?h . ?\261) (?$ . ?\245) (?` . ?\242)
- (?~ . ?\270) (?\ . ?~) (space . ?~))
- (?/ (?C . ?\305) (?G . ?\325) (?H . ?\241) (?I . ?\251) (?Z . ?\257)
- (?c . ?\345) (?g . ?\365) (?h . ?\261) (?i . ?\271) (?z . ?\277)
- (?r . ?\256) (?. . ?\377) (?# . ?\243) (?$ . ?\244)
- (?/ . ?\260) (?\ . ?/) (space . ?/)))
- )
- "List of language-specific customizations for the ISO Accents mode.
-
- Each element of the list is of the form
-
- (LANGUAGE [CHARSET]
- (PSEUDO-ACCENT MAPPINGS)
- (PSEUDO-ACCENT MAPPINGS)
- ...)
-
- LANGUAGE is a string naming the language.
- CHARSET (which may be omitted) is the symbol name
- of the character set used in this language.
- If CHARSET is omitted, latin-iso8859-1 is the default.
- 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-charset 'latin-iso8859-1
- "Charset that will be used for generated characters.")
-
- (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))
- (charset iso-accents-charset)
- ;; 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)
- (iso-read-event))
- (insert first-char)
- (prog1 (iso-read-event)
- (delete-region (1- (point)) (point)))))
- (entry (cdr (assq second-char list))))
- (if entry
- (progn
- (if (and (consp entry) (symbolp (car entry)))
- (setq charset (car entry)
- entry (cdr entry)))
- ;; Found it: return the mapped char
- (vector
- (iso-char-to-event (iso-make-char charset entry))))
- ;; Otherwise, advance and schedule the second key for execution.
- (setq unread-command-events (cons (iso-char-list-to-event
- (list second-char))
- unread-command-events))
- (vector (iso-char-to-event 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-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 (cdr (assoc language iso-languages)))
- tail)
- (if (not table)
- (error "Unknown language `%s'" language)
- (setq iso-accents-charset (if (symbolp (car table))
- (car table)
- 'latin-iso8859-1))
- (if (symbolp (car table))
- (setq table (cdr table)))
- (setq iso-language language
- iso-accents-list 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 (iso-char-to-event
- (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)))
-
- (if (boundp 'minibuffer-setup-hook)
- (add-hook 'minibuffer-setup-hook 'iso-acc-minibuf-setup)
- (add-hook 'minibuf-setup-hook 'iso-acc-minibuf-setup))
-
- ;;; iso-acc.el ends here
-