-;;; encoded-kb.el --- Handler to input multibyte characters encoded somehow
+;;; encoded-kb.el --- handler to input multibyte characters encoded somehow
-;; Copyright (C) 1995 Free Software Foundation, Inc.
;; Copyright (C) 1995 Electrotechnical Laboratory, JAPAN.
+;; Licensed to the Free Software Foundation.
;; This file is part of GNU Emacs.
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
-(defvar encoded-kbd-mode nil
- "Non-nil if in Encoded-kbd minor mode.")
-(put 'encoded-kbd-mode 'permanent-local t)
+;;; Commentary:
-(or (assq 'encoded-kbd-mode minor-mode-alist)
- (setq minor-mode-alist
- (cons '(encoded-kbd-mode " Encoded-kbd") minor-mode-alist)))
+;;; Code:
-(defvar encoded-kbd-mode-map
- (let ((map (make-sparse-keymap))
- (i 128))
- (define-key map "\e" 'encoded-kbd-iso2022-esc-prefix)
- (while (< i 256)
- (define-key map (vector i) 'encoded-kbd-handle-8bit)
- (setq i (1+ i)))
- map)
+;; Usually this map is empty (even if Encoded-kbd mode is on), but if
+;; the keyboard coding system is iso-2022-based, it defines dummy key
+;; bindings for ESC $ ..., etc. so that those bindings in
+;; key-translation-map take effect.
+(defconst encoded-kbd-mode-map (make-sparse-keymap)
"Keymap for Encoded-kbd minor mode.")
-(or (assq 'encoded-kbd-mode minor-mode-map-alist)
- (setq minor-mode-map-alist
- (cons (cons 'encoded-kbd-mode encoded-kbd-mode-map)
- minor-mode-map-alist)))
-
;; Subsidiary keymaps for handling ISO2022 escape sequences.
(defvar encoded-kbd-iso2022-esc-map
(defvar encoded-kbd-iso2022-designation-map
(let ((map (make-sparse-keymap))
- (l charset-list))
+ (l charset-list)
+ final-char)
(while l
- (define-key map
- (char-to-string (charset-iso-final-char (car l)))
- 'encoded-kbd-iso2022-designation)
+ (setq final-char (charset-iso-final-char (car l)))
+ (if (> final-char 0)
+ (define-key map (char-to-string final-char)
+ 'encoded-kbd-iso2022-designation))
(setq l (cdr l)))
map)
"Keymap for handling ISO2022 designation sequence in Encoded-kbd mode.")
(fset 'encoded-kbd-iso2022-designation-prefix
encoded-kbd-iso2022-designation-map)
-(defvar encoded-kbd-iso2022-non-ascii-map
- (let ((map (make-keymap))
- (i 32))
- (while (< i 128)
- (define-key map (char-to-string i) 'encoded-kbd-self-insert-iso2022-7bit)
- (setq i (1+ i)))
- (define-key map "\e" 'encoded-kbd-iso2022-esc-prefix)
- map)
- "Keymap for handling non-ASCII character set in Encoded-kbd mode.")
-
-;; One of the symbols `sjis', `iso2022-7', `iso2022-8', or `big5' to
-;; denote what kind of coding-system we are now handling in
-;; Encoded-kbd mode.
-(defvar encoded-kbd-coding nil)
-
-;; Keep information of designation state of ISO2022 encoding. This is
-;; a vector of character sets currently designated to each graphic
-;; registers (0..3).
+;; Keep information of designation state of ISO2022 encoding. When
+;; Encoded-kbd mode is on, this is set to a vector of length 4, the
+;; elements are character sets currently designated to graphic
+;; registers 0 thru 3.
(defvar encoded-kbd-iso2022-designations nil)
-(make-variable-buffer-local 'encoded-kbd-iso2022-designations)
(put 'encoded-kbd-iso2022-designations 'permanent-local t)
-;; Keep information of invocation state of ISO2022 encoding. This is
-;; a vector of graphic register numbers currently invoked to each
-;; graphic plane (0..1), the third element is a single shifted graphic
-;; register number.
+;; Keep information of invocation state of ISO2022 encoding. When
+;; Encoded-kbd mode is on, this is set to a vector of length 3,
+;; graphic register numbers currently invoked to graphic plane 1 and
+;; 2, and a single shifted graphic register number.
(defvar encoded-kbd-iso2022-invocations nil)
-(make-variable-buffer-local 'encoded-kbd-iso2022-invocations)
(put 'encoded-kbd-iso2022-invocations 'permanent-local t)
-(defun encoded-kbd-iso2022-designation ()
- "Do ISO2022 designation according to the curren key in Encoded-kbd mode.
+(defsubst encoded-kbd-last-key ()
+ (let ((keys (this-single-command-keys)))
+ (aref keys (1- (length keys)))))
+
+(defun encoded-kbd-iso2022-designation (ignore)
+ "Do ISO2022 designation according to the current key in Encoded-kbd mode.
The following key sequence may cause multilingual text insertion."
- (interactive)
- (let ((key-seq (this-command-keys))
+ (let ((key-seq (this-single-command-keys))
+ (prev-g0-charset (aref encoded-kbd-iso2022-designations
+ (aref encoded-kbd-iso2022-invocations 0)))
intermediate-char final-char
reg dimension chars charset)
(if (= (length key-seq) 4)
chars (if (< intermediate-char ?,) 94 96)
final-char (aref key-seq 2)
reg (mod intermediate-char 4))))
- (if (setq charset (iso-charset dimension chars final-char))
- (aset encoded-kbd-iso2022-designations reg charset)
- (error "Character set of DIMENSION %s, CHARS %s, FINAL-CHAR `%c' is not supported"
- dimension chars final-char))
-
- (if (memq (aref encoded-kbd-iso2022-designations
- (aref encoded-kbd-iso2022-invocations 0))
- '(ascii latin-jisx0201))
- ;; Graphic plane 0 (0x20..0x7f) is for ASCII. We don't have
- ;; to handle characters in this range specially.
- (throw 'exit nil)
- ;; Graphic plane 0 is for non-ASCII.
- (let ((overriding-local-map encoded-kbd-iso2022-non-ascii-map))
- (recursive-edit)))))
-
-(defun encoded-kbd-handle-8bit ()
- "Handle an 8-bit character enterned in Encoded-kbd mode."
- (interactive)
- (cond ((eq encoded-kbd-coding 'iso2022-7)
- (error "Can't handle the character code %d" last-command-char))
-
- ((eq encoded-kbd-coding 'iso2022-8)
- (cond ((= last-command-char ?\216)
- (aset encoded-kbd-iso2022-invocations 2 2))
-
- ((= last-command-char ?\217)
- (aset encoded-kbd-iso2022-invocations 2 3))
-
- ((> last-command-char ?\240)
- (encoded-kbd-self-insert-iso2022-8bit))
-
- (t
- (error "Can't handle the character code %d"
- last-command-char))))
-
- ((eq encoded-kbd-coding 'sjis)
- (encoded-kbd-self-insert-sjis))
-
- (t
- (encoded-kbd-self-insert-big5))))
-
-(defun encoded-kbd-self-insert-iso2022-7bit ()
- (interactive)
- (let* ((charset (aref encoded-kbd-iso2022-designations
- (or (aref encoded-kbd-iso2022-invocations 2)
- (aref encoded-kbd-iso2022-invocations 0))))
- (last-command-char
- (if (= (charset-bytes charset) 1)
- (make-char charset last-command-char)
- (make-char charset last-command-char (read-char-exclusive)))))
- (self-insert-command 1)
+ (aset encoded-kbd-iso2022-designations reg
+ (iso-charset dimension chars final-char)))
+ "")
+
+(defun encoded-kbd-iso2022-single-shift (ignore)
+ (let ((char (encoded-kbd-last-key)))
+ (aset encoded-kbd-iso2022-invocations 2
+ (aref encoded-kbd-iso2022-designations
+ (if (= char ?\216) 2 3))))
+ "")
+
+(defun encoded-kbd-self-insert-iso2022-7bit (ignore)
+ (let ((char (encoded-kbd-last-key))
+ (charset (aref encoded-kbd-iso2022-designations
+ (or (aref encoded-kbd-iso2022-invocations 2)
+ (aref encoded-kbd-iso2022-invocations 0)))))
(aset encoded-kbd-iso2022-invocations 2 nil)
- ))
-
-(defun encoded-kbd-self-insert-iso2022-8bit ()
- (interactive)
- (let* ((charset (aref encoded-kbd-iso2022-designations
- (or (aref encoded-kbd-iso2022-invocations 2)
- (aref encoded-kbd-iso2022-invocations 1))))
- (last-command-char
- (if (= (charset-bytes charset) 1)
- (make-char charset last-command-char)
- (make-char charset last-command-char (read-char-exclusive)))))
- (self-insert-command 1)
+ (vector (if (= (charset-dimension charset) 1)
+ (make-char charset char)
+ (make-char charset char (read-char-exclusive))))))
+
+(defun encoded-kbd-self-insert-iso2022-8bit (ignore)
+ (let ((char (encoded-kbd-last-key))
+ (charset (aref encoded-kbd-iso2022-designations
+ (or (aref encoded-kbd-iso2022-invocations 2)
+ (aref encoded-kbd-iso2022-invocations 1)))))
(aset encoded-kbd-iso2022-invocations 2 nil)
- ))
-
-(defun encoded-kbd-self-insert-sjis ()
- (interactive)
- (let ((last-command-char
- (if (or (< last-command-char ?\xA0) (>= last-command-char ?\xE0))
- (decode-sjis-char (+ (ash last-command-char 8)
- (read-char-exclusive)))
- (make-char 'latin-jisx0201 last-command-char))))
- (self-insert-command 1)))
-
-(defun encoded-kbd-self-insert-big5 ()
- (interactive)
- (let ((last-command-char
- (decode-big5-char (+ (ash last-command-char 8)
- (read-char-exclusive)))))
- (self-insert-command 1)))
+ (vector (if (= (charset-dimension charset) 1)
+ (make-char charset char)
+ (make-char charset char (read-char-exclusive))))))
+
+(defun encoded-kbd-self-insert-sjis (ignore)
+ (let ((char (encoded-kbd-last-key)))
+ (vector
+ (if (or (< char ?\xA0) (>= char ?\xE0))
+ (decode-sjis-char (+ (ash char 8) (read-char-exclusive)))
+ (make-char 'katakana-jisx0201 char)))))
+
+(defun encoded-kbd-self-insert-big5 (ignore)
+ (let ((char (encoded-kbd-last-key)))
+ (vector
+ (decode-big5-char (+ (ash char 8) (read-char-exclusive))))))
+
+(defun encoded-kbd-self-insert-ccl (ignore)
+ (let ((str (char-to-string (encoded-kbd-last-key)))
+ (ccl (car (aref (coding-system-spec (keyboard-coding-system)) 4)))
+ (vec [nil nil nil nil nil nil nil nil nil])
+ result)
+ (while (= (length (setq result (ccl-execute-on-string ccl vec str t))) 0)
+ (dotimes (i 9) (aset vec i nil))
+ (setq str (format "%s%c" str (read-char-exclusive))))
+ (vector (aref result 0))))
+
+(defun encoded-kbd-setup-keymap (coding)
+ ;; At first, reset the keymap.
+ (define-key encoded-kbd-mode-map "\e" nil)
+ ;; Then setup the keymap according to the keyboard coding system.
+ (cond
+ ((eq (coding-system-type coding) 1) ; SJIS
+ (let ((i 128))
+ (while (< i 256)
+ (define-key key-translation-map
+ (vector i) 'encoded-kbd-self-insert-sjis)
+ (setq i (1+ i))))
+ 8)
+
+ ((eq (coding-system-type coding) 3) ; Big5
+ (let ((i 161))
+ (while (< i 255)
+ (define-key key-translation-map
+ (vector i) 'encoded-kbd-self-insert-big5)
+ (setq i (1+ i))))
+ 8)
+
+ ((eq (coding-system-type coding) 2) ; ISO-2022
+ (let ((flags (coding-system-flags coding))
+ use-designation)
+ (if (aref flags 8)
+ nil ; Don't support locking-shift.
+ (setq encoded-kbd-iso2022-designations (make-vector 4 nil)
+ encoded-kbd-iso2022-invocations (make-vector 3 nil))
+ (dotimes (i 4)
+ (if (aref flags i)
+ (if (charsetp (aref flags i))
+ (aset encoded-kbd-iso2022-designations
+ i (aref flags i))
+ (setq use-designation t)
+ (if (charsetp (car-safe (aref flags i)))
+ (aset encoded-kbd-iso2022-designations
+ i (car (aref flags i)))))))
+ (aset encoded-kbd-iso2022-invocations 0 0)
+ (if (aref encoded-kbd-iso2022-designations 1)
+ (aset encoded-kbd-iso2022-invocations 1 1))
+ (when use-designation
+ (define-key encoded-kbd-mode-map "\e" 'encoded-kbd-iso2022-esc-prefix)
+ (define-key key-translation-map "\e" 'encoded-kbd-iso2022-esc-prefix))
+ (when (or (aref flags 2) (aref flags 3))
+ (define-key key-translation-map
+ [?\216] 'encoded-kbd-iso2022-single-shift)
+ (define-key key-translation-map
+ [?\217] 'encoded-kbd-iso2022-single-shift))
+ (or (eq (aref flags 0) 'ascii)
+ (dotimes (i 96)
+ (define-key key-translation-map
+ (vector (+ 32 i)) 'encoded-kbd-self-insert-iso2022-7bit)))
+ (if (aref flags 7)
+ t
+ (dotimes (i 96)
+ (define-key key-translation-map
+ (vector (+ 160 i)) 'encoded-kbd-self-insert-iso2022-8bit))
+ 8))))
+
+ ((eq (coding-system-type coding) 4) ; CCL-base
+ (let ((valid-codes (or (coding-system-get coding 'valid-codes)
+ '((128 . 255))))
+ elt from to valid)
+ (while valid-codes
+ (setq elt (car valid-codes) valid-codes (cdr valid-codes))
+ (if (consp elt)
+ (setq from (car elt) to (cdr elt))
+ (setq from (setq to elt)))
+ (while (<= from to)
+ (if (>= from 128)
+ (define-key key-translation-map
+ (vector from) 'encoded-kbd-self-insert-ccl))
+ (setq from (1+ from))))
+ 8))
+
+ (t
+ nil)))
+
+;; key-translation-map at the time Encoded-kbd mode is turned on is
+;; saved here.
+(defvar saved-key-translation-map nil)
+
+;; Input mode at the time Encoded-kbd mode is turned on is saved here.
+(defvar saved-input-mode nil)
+(put 'encoded-kbd-mode 'permanent-local t)
;;;###autoload
-(defun encoded-kbd-mode (&optional arg)
+(define-minor-mode encoded-kbd-mode
"Toggle Encoded-kbd minor mode.
-With arg, turn Keyboard-kbd mode on if and only if arg is positive.
-
-When in Encoded-kbd mode, a text sent from a terminal keyboard
-is accepted as a multilingual text encoded in a coding system
-set by the command `encoded-kbd-set-coding-system'"
- (interactive "P")
- (setq encoded-kbd-mode
- (if (null arg) (null encoded-kbd-mode)
- (> (prefix-numeric-value arg) 0)))
- (if encoded-kbd-mode
- (let* ((coding (coding-system-vector (keyboard-coding-system)))
- (input-mode (current-input-mode)))
- (cond ((null coding)
- (setq encoded-kbd-mode nil)
- (error "No coding-system for terminal keyboard is set"))
-
- ((= (coding-vector-type coding) 1) ; SJIS
- (set-input-mode (nth 0 input-mode) (nth 1 input-mode)
- 'use-8th-bit (nth 3 input-mode))
- (setq encoded-kbd-coding 'sjis))
-
- ((= (coding-vector-type coding) 2) ; ISO2022
- (if (aref (coding-vector-flags coding) 7) ; 7-bit only
- (setq encoded-kbd-coding 'iso2022-7)
- (set-input-mode (nth 0 input-mode) (nth 1 input-mode)
- 'use-8th-bit (nth 3 input-mode))
- (setq encoded-kbd-coding 'iso2022-8))
- (make-variable-buffer-local 'encoded-kbd-iso2022-designations)
- (setq encoded-kbd-iso2022-designations (make-vector 4 nil))
- (let ((flags (coding-vector-flags coding))
- (i 0))
- (while (< i 4)
- (if (charsetp (aref flags i))
- (aset encoded-kbd-iso2022-designations i
- (aref flags i)))
- (setq i (1+ i))))
- (make-variable-buffer-local 'encoded-kbd-iso2022-invocations)
- (setq encoded-kbd-iso2022-invocations (make-vector 3 nil))
- (aset encoded-kbd-iso2022-invocations 0 0)
- (aset encoded-kbd-iso2022-invocations 1 1))
-
- ((= (coding-vector-type coding) 3) ; BIG5
- (set-input-mode (nth 0 input-mode) (nth 1 input-mode)
- 'use-8th-bit (nth 3 input-mode))
- (setq encoded-kbd-coding 'big5))
-
- (t
- (setq encoded-kbd-mode nil)
- (error "Coding-system `%s' is not supported in Encoded-kbd mode"
- (keyboard-coding-system))))
- (setq inactivate-current-input-method-function 'encoded-kbd-mode)
- (setq describe-current-input-method-function 'encoded-kbd-mode-help)
- (run-hooks 'encoded-kbd-mode-hook))
- (setq describe-current-input-method-function nil)
- (setq current-input-method nil))
- (force-mode-line-update))
+With arg, turn Encoded-kbd mode on if and only if arg is positive.
+You should not turn this mode on manually, instead use the command
+\\[set-keyboard-coding-system] which turns on or off this mode
+automatically.
+
+In Encoded-kbd mode, a text sent from keyboard is accepted
+as a multilingual text encoded in a coding system set by
+\\[set-keyboard-coding-system]."
+ :global t
+
+ (if encoded-kbd-mode
+ ;; We are turning on Encoded-kbd mode.
+ (let ((coding (keyboard-coding-system))
+ result)
+ (or saved-key-translation-map
+ (if (keymapp key-translation-map)
+ (setq saved-key-translation-map
+ (copy-keymap key-translation-map))
+ (setq key-translation-map (make-sparse-keymap))))
+ (or saved-input-mode
+ (setq saved-input-mode
+ (current-input-mode)))
+ (setq result (and coding (encoded-kbd-setup-keymap coding)))
+ (if result
+ (if (eq result 8)
+ (set-input-mode
+ (nth 0 saved-input-mode)
+ (nth 1 saved-input-mode)
+ 'use-8th-bit
+ (nth 3 saved-input-mode)))
+ (setq encoded-kbd-mode nil
+ saved-key-translation-map nil
+ saved-input-mode nil)
+ (error "Unsupported coding system in Encoded-kbd mode: %S"
+ coding)))
+
+ ;; We are turning off Encoded-kbd mode.
+ (setq key-translation-map saved-key-translation-map
+ saved-key-translation-map nil)
+ (apply 'set-input-mode saved-input-mode)
+ (setq saved-input-mode nil)))
+
+(provide 'encoded-kb)
+
+;;; arch-tag: 76f0f9b3-65e7-45c3-b692-59509a87ad44
;;; encoded-kb.el ends here