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493 lines
18 KiB
EmacsLisp
493 lines
18 KiB
EmacsLisp
;;; iso-acc.el --- minor mode providing electric accent keys
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;; Copyright (C) 1993, 1994, 1996, 2001, 2002, 2005
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;; Free Software Foundation, Inc.
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;; Author: Johan Vromans
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;; Maintainer: FSF
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;; Keywords: i18n
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs 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
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;; Function `iso-accents-mode' activates a minor mode in which
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;; typewriter "dead keys" are emulated. The purpose of this emulation
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;; is to provide a simple means for inserting accented characters
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;; according to the ISO-8859-1...3 character sets.
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;;
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;; In `iso-accents-mode', pseudo accent characters are used to
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;; introduce accented keys. The pseudo-accent characters are:
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;;
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;; ' (minute) -> actue accent
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;; ` (backtick) -> grave accent
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;; " (second) -> diaeresis
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;; ^ (caret) -> circumflex
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;; ~ (tilde) -> tilde over the character
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;; / (slash) -> slash through the character.
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;; Also: /A is A-with-ring and /E is AE ligature.
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;; These two are enabled only if you set iso-accents-enable
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;; to include them:
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;; . (period) -> dot over the character (some languages only)
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;; , (cedilla) -> cedilla under the character (some languages only)
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;;
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;; The action taken depends on the key that follows the pseudo accent.
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;; In general:
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;;
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;; pseudo-accent + appropriate letter -> accented letter
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;; pseudo-accent + space -> pseudo-accent (except comma and period)
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;; pseudo-accent + pseudo-accent -> accent (if available)
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;; pseudo-accent + other -> pseudo-accent + other
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;;
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;; If the pseudo-accent is followed by anything else than a
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;; self-insert-command, the dead-key code is terminated, the
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;; pseudo-accent inserted 'as is' and the bell is rung to signal this.
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;;
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;; Function `iso-accents-mode' can be used to enable the iso accents
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;; minor mode, or disable it.
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;; If you want only some of these characters to serve as accents,
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;; add a language to `iso-languages' which specifies the accent characters
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;; that you want, then select the language with `iso-accents-customize'.
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;;; Code:
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(provide 'iso-acc)
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(defgroup iso-acc nil
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"Minor mode providing electric accent keys."
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:prefix "iso-accents-"
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:group 'i18n)
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(defcustom iso-accents-insert-offset nonascii-insert-offset
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"*Offset added by ISO Accents mode to character codes 0200 and above."
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:type 'integer
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:group 'iso-acc)
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(defvar iso-languages
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'(("catalan"
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;; Note this includes some extra characters used in Spanish,
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;; on the idea that someone who uses Catalan is likely to use Spanish
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;; as well.
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(?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
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(?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363) (?u . ?\372)
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(?\ . ?'))
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(?` (?A . ?\300) (?E . ?\310) (?O . ?\322)
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(?a . ?\340) (?e . ?\350) (?o . ?\362)
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(?\ . ?`))
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(?\" (?I . ?\317) (?U . ?\334) (?i . ?\357) (?u . ?\374)
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(?\ . ?\"))
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(?~ (?C . ?\307) (?N . ?\321) (?c . ?\347) (?n . ?\361)
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(?> . ?\273) (?< . ?\253) (?! . ?\241) (?? . ?\277)
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(?\ . ?\~)))
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("esperanto"
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(?^ (?H . ?\246) (?J . ?\254) (?h . ?\266) (?j . ?\274) (?C . ?\306)
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(?G . ?\330) (?S . ?\336) (?c . ?\346) (?g . ?\370) (?s . ?\376)
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(?^ . ?^) (?\ . ?^))
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(?~ (?U . ?\335) (?u . ?\375) (?\ . ?~)))
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("french"
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(?' (?E . ?\311) (?C . ?\307) (?e . ?\351) (?c . ?\347)
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(?\ . ?'))
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(?` (?A . ?\300) (?E . ?\310) (?U . ?\331)
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(?a . ?\340) (?e . ?\350) (?u . ?\371)
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(?\ . ?`))
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(?^ (?A . ?\302) (?E . ?\312) (?I . ?\316) (?O . ?\324) (?U . ?\333)
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(?a . ?\342) (?e . ?\352) (?i . ?\356) (?o . ?\364) (?u . ?\373)
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(?\ . ?^))
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(?\" (?E . ?\313) (?I . ?\317)
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(?e . ?\353) (?i . ?\357)
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(?\ . ?\"))
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(?~ (?< . ?\253) (?> . ?\273) (?C . ?\307) (?c . ?\347)
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(?\ . ?~))
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(?, (?C . ?\307) (?c . ?\347) (?\ . ?\,)))
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("german"
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(?\" (?A . ?\304) (?O . ?\326) (?U . ?\334)
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(?a . ?\344) (?o . ?\366) (?u . ?\374) (?s . ?\337) (?\ . ?\")))
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("irish"
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(?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
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(?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363) (?u . ?\372)
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(?\ . ?')))
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("portuguese"
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(?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
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(?C . ?\307) (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363)
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(?u . ?\372) (?c . ?\347)
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(?\ . ?'))
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(?` (?A . ?\300) (?a . ?\340)
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(?\ . ?`))
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(?^ (?A . ?\302) (?E . ?\312) (?O . ?\324)
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(?a . ?\342) (?e . ?\352) (?o . ?\364)
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(?\ . ?^))
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(?\" (?U . ?\334) (?u . ?\374)
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(?\ . ?\"))
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(?~ (?A . ?\303) (?O . ?\325) (?a . ?\343) (?o . ?\365)
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(?C . ?\307) (?N . ?\321) (?c . ?\347) (?n . ?\361)
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(?\ . ?~))
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(?, (?c . ?\347) (?C . ?\307) (?, . ?,)))
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("spanish"
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(?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
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(?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363) (?u . ?\372)
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(?\ . ?'))
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(?\" (?U . ?\334) (?u . ?\374) (?\ . ?\"))
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(?\~ (?N . ?\321) (?n . ?\361) (?> . ?\273) (?< . ?\253) (?! . ?\241)
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(?? . ?\277) (?\ . ?\~)))
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("latin-1"
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(?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
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(?Y . ?\335) (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363)
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(?u . ?\372) (?y . ?\375) (?' . ?\264)
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(?\ . ?'))
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(?` (?A . ?\300) (?E . ?\310) (?I . ?\314) (?O . ?\322) (?U . ?\331)
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(?a . ?\340) (?e . ?\350) (?i . ?\354) (?o . ?\362) (?u . ?\371)
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(?` . ?`) (?\ . ?`))
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(?^ (?A . ?\302) (?E . ?\312) (?I . ?\316) (?O . ?\324) (?U . ?\333)
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(?a . ?\342) (?e . ?\352) (?i . ?\356) (?o . ?\364) (?u . ?\373)
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(?^ . ?^) (?\ . ?^))
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(?\" (?A . ?\304) (?E . ?\313) (?I . ?\317) (?O . ?\326) (?U . ?\334)
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(?a . ?\344) (?e . ?\353) (?i . ?\357) (?o . ?\366) (?s . ?\337)
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(?u . ?\374) (?y . ?\377)
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(?\" . ?\250) (?\ . ?\"))
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(?~ (?A . ?\303) (?C . ?\307) (?D . ?\320) (?N . ?\321) (?O . ?\325)
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(?T . ?\336) (?a . ?\343) (?c . ?\347) (?d . ?\360) (?n . ?\361)
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(?o . ?\365) (?t . ?\376)
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(?> . ?\273) (?< . ?\253) (?! . ?\241) (?? . ?\277)
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(?\~ . ?\270) (?\ . ?~))
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(?/ (?A . ?\305) (?E . ?\306) (?O . ?\330) (?a . ?\345) (?e . ?\346)
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(?o . ?\370)
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(?/ . ?\260) (?\ . ?/)))
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("latin-2" latin-iso8859-2
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(?' (?A . ?\301) (?C . ?\306) (?D . ?\320) (?E . ?\311) (?I . ?\315)
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(?L . ?\305) (?N . ?\321) (?O . ?\323) (?R . ?\300) (?S . ?\246)
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(?U . ?\332) (?Y . ?\335) (?Z . ?\254)
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(?a . ?\341) (?c . ?\346) (?d . ?\360) (?e . ?\351) (?i . ?\355)
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(?l . ?\345) (?n . ?\361) (?o . ?\363) (?r . ?\340) (?s . ?\266)
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(?u . ?\372) (?y . ?\375) (?z . ?\274)
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(?' . ?\264) (?\ . ?'))
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(?` (?A . ?\241) (?C . ?\307) (?E . ?\312) (?L . ?\243) (?S . ?\252)
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(?T . ?\336) (?Z . ?\257)
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(?a . ?\261) (?l . ?\263) (?c . ?\347) (?e . ?\352) (?s . ?\272)
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(?t . ?\376) (?z . ?\277)
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(?` . ?\252)
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(?. . ?\377) (?\ . ?`))
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(?^ (?A . ?\302) (?I . ?\316) (?O . ?\324)
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(?a . ?\342) (?i . ?\356) (?o . ?\364)
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(?^ . ?^) ; no special code?
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(?\ . ?^))
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(?\" (?A . ?\304) (?E . ?\313) (?O . ?\326) (?U . ?\334)
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(?a . ?\344) (?e . ?\353) (?o . ?\366) (?s . ?\337) (?u . ?\374)
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(?\" . ?\250)
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(?\ . ?\"))
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(?~ (?A . ?\303) (?C . ?\310) (?D . ?\317) (?L . ?\245) (?N . ?\322)
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(?O . ?\325) (?R . ?\330) (?S . ?\251) (?T . ?\253) (?U . ?\333)
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(?Z . ?\256)
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(?a . ?\343) (?c . ?\350) (?d . ?\357) (?l . ?\265) (?n . ?\362)
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(?o . ?\365) (?r . ?\370) (?s . ?\271) (?t . ?\273) (?u . ?\373)
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(?z . ?\276)
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(?v . ?\242) ; v accent
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(?\~ . ?\242) ; v accent
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(?\. . ?\270) ; cedilla accent
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(?\ . ?~)))
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("latin-3" latin-iso8859-3
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(?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
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(?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363) (?u . ?\372)
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(?' . ?\264) (?\ . ?'))
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(?` (?A . ?\300) (?E . ?\310) (?I . ?\314) (?O . ?\322) (?U . ?\331)
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(?a . ?\340) (?e . ?\350) (?i . ?\354) (?o . ?\362) (?u . ?\371)
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(?` . ?`) (?\ . ?`))
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(?^ (?A . ?\302) (?C . ?\306) (?E . ?\312) (?G . ?\330) (?H . ?\246)
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(?I . ?\316) (?J . ?\254) (?O . ?\324) (?S . ?\336) (?U . ?\333)
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(?a . ?\342) (?c . ?\346) (?e . ?\352) (?g . ?\370) (?h . ?\266)
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(?i . ?\356) (?j . ?\274) (?o . ?\364) (?s . ?\376) (?u . ?\373)
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(?^ . ?^) (?\ . ?^))
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(?\" (?A . ?\304) (?E . ?\313) (?I . ?\317) (?O . ?\326) (?U . ?\334)
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(?a . ?\344) (?e . ?\353) (?i . ?\357) (?o . ?\366) (?u . ?\374)
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(?s . ?\337)
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(?\" . ?\250) (?\ . ?\"))
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(?~ (?A . ?\303) (?C . ?\307) (?D . ?\320) (?N . ?\321) (?O . ?\325)
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(?a . ?\343) (?c . ?\347) (?d . ?\360) (?n . ?\361) (?o . ?\365)
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(?$ . ?\245) (?S . ?\252) (?s . ?\272) (?G . ?\253) (?g . ?\273)
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(?U . ?\335) (?u . ?\375) (?` . ?\242)
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(?~ . ?\270) (?\ . ?~))
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(?/ (?C . ?\305) (?G . ?\325) (?H . ?\241) (?I . ?\251) (?Z . ?\257)
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(?c . ?\345) (?g . ?\365) (?h . ?\261) (?i . ?\271) (?z . ?\277)
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(?r . ?\256)
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(?. . ?\377) (?# . ?\243) (?$ . ?\244)
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(?/ . ?\260) (?\ . ?/))
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(?. (?C . ?\305) (?G . ?\325) (?I . ?\251) (?Z . ?\257)
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(?c . ?\345) (?g . ?\365) (?z . ?\277))))
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"List of language-specific customizations for the ISO Accents mode.
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Each element of the list is of the form
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(LANGUAGE [CHARSET]
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(PSEUDO-ACCENT MAPPINGS)
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(PSEUDO-ACCENT MAPPINGS)
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...)
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LANGUAGE is a string naming the language.
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CHARSET (which may be omitted) is the symbol name
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of the character set used in this language.
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If CHARSET is omitted, latin-iso8859-1 is the default.
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PSEUDO-ACCENT is a char specifying an accent key.
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MAPPINGS are cons cells of the form (CHAR . ISO-CHAR).
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The net effect is that the key sequence PSEUDO-ACCENT CHAR is mapped
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to ISO-CHAR on input.")
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(defvar iso-language nil
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"Language for which ISO Accents mode is currently customized.
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Change it with the `iso-accents-customize' function.")
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(defvar iso-accents-list nil
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"Association list for ISO accent combinations, for the chosen language.")
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(defcustom iso-accents-mode nil
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"*Non-nil enables ISO Accents mode.
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Setting this variable makes it local to the current buffer.
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See the function `iso-accents-mode'."
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:type 'boolean
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:group 'iso-acc)
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(make-variable-buffer-local 'iso-accents-mode)
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(defcustom iso-accents-enable '(?' ?` ?^ ?\" ?~ ?/)
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"*List of accent keys that become prefixes in ISO Accents mode.
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The default is (?' ?` ?^ ?\" ?~ ?/), which contains all the supported
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accent keys. If you set this variable to a list in which some of those
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characters are missing, the missing ones do not act as accents.
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Note that if you specify a language with `iso-accents-customize',
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that can also turn off certain prefixes (whichever ones are not needed in
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the language you choose)."
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:type '(repeat character)
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:group 'iso-acc)
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(defun iso-accents-accent-key (prompt)
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"Modify the following character by adding an accent to it."
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;; Pick up the accent character.
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(if (and iso-accents-mode
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(memq last-input-char iso-accents-enable))
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(iso-accents-compose prompt)
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(vector last-input-char)))
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;; The iso-accents-compose function is called deep inside Emacs' read
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;; key sequence machinery, so the call to read-event below actually
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;; recurses into that machinery. Doing that does not cause any
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;; problem on its own, but read-event will have marked the window's
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;; display matrix to be accurate -- which is broken by the subsequent
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;; call to delete-region. Therefore, we must call force-window-update
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;; after delete-region to explicitly clear the accurate state of the
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;; window's display matrix.
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(defun iso-accents-compose (prompt)
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(let* ((first-char last-input-char)
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(list (assq first-char iso-accents-list))
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;; Wait for the second key and look up the combination.
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(second-char (if (or prompt
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(not (eq (key-binding "a")
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'self-insert-command))
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;; Not at start of a key sequence.
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(> (length (this-single-command-keys)) 1)
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;; Called from anything but the command loop.
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this-command)
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(progn
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(message "%s%c"
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(or prompt "Compose with ")
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first-char)
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(read-event))
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(insert first-char)
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(prog1 (read-event)
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(delete-region (1- (point)) (point))
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;; Display is no longer up-to-date.
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(force-window-update (selected-window)))))
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(entry (cdr (assq second-char list))))
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(if entry
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;; Found it: return the mapped char
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(vector
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(if (and enable-multibyte-characters
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(>= entry ?\200))
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(+ iso-accents-insert-offset entry)
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entry))
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;; Otherwise, advance and schedule the second key for execution.
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(push second-char unread-command-events)
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(vector first-char))))
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;; It is a matter of taste if you want the minor mode indicated
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;; in the mode line...
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;; If so, uncomment the next four lines.
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;; (or (assq 'iso-accents-mode minor-mode-alist)
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;; (setq minor-mode-alist
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;; (append minor-mode-alist
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;; '((iso-accents-mode " ISO-Acc")))))
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;;;###autoload
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(defun iso-accents-mode (&optional arg)
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"Toggle ISO Accents mode, in which accents modify the following letter.
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This permits easy insertion of accented characters according to ISO-8859-1.
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When Iso-accents mode is enabled, accent character keys
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\(`, ', \", ^, / and ~) do not self-insert; instead, they modify the following
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letter key so that it inserts an ISO accented letter.
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You can customize ISO Accents mode to a particular language
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with the command `iso-accents-customize'.
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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)))
|
||
all-accents tail)
|
||
(if (not table)
|
||
(error "Unknown language `%s'" language)
|
||
(setq iso-accents-insert-offset (- (make-char (if (symbolp (car table))
|
||
(car table)
|
||
'latin-iso8859-1))
|
||
128))
|
||
(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 (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 'minibuffer-setup-hook 'iso-acc-minibuf-setup)
|
||
|
||
;; arch-tag: 149ff409-7c3e-4574-9b5d-ac038939c0a6
|
||
;;; iso-acc.el ends here
|