(defvar encoded-kbd-mode nil
"Non-nil if in Encoded-kbd minor mode.")
(put 'encoded-kbd-mode 'permanent-local t)
(defconst encoded-kbd-mode-map (make-sparse-keymap)
"Keymap for Encoded-kbd minor mode.")
(let ((slot (assq 'encoded-kbd-mode minor-mode-map-alist)))
(if slot
(setcdr slot encoded-kbd-mode-map)
(setq minor-mode-map-alist
(cons (cons 'encoded-kbd-mode encoded-kbd-mode-map)
minor-mode-map-alist))))
(defvar encoded-kbd-iso2022-esc-map
(let ((map (make-sparse-keymap)))
(define-key map "$" 'encoded-kbd-iso2022-esc-dollar-prefix)
(define-key map "(" 'encoded-kbd-iso2022-designation-prefix)
(define-key map ")" 'encoded-kbd-iso2022-designation-prefix)
(define-key map "," 'encoded-kbd-iso2022-designation-prefix)
(define-key map "-" 'encoded-kbd-iso2022-designation-prefix)
map)
"Keymap for handling ESC code in Encoded-kbd mode.")
(fset 'encoded-kbd-iso2022-esc-prefix encoded-kbd-iso2022-esc-map)
(defvar encoded-kbd-iso2022-esc-dollar-map
(let ((map (make-sparse-keymap)))
(define-key map "(" 'encoded-kbd-iso2022-designation-prefix)
(define-key map ")" 'encoded-kbd-iso2022-designation-prefix)
(define-key map "," 'encoded-kbd-iso2022-designation-prefix)
(define-key map "-" 'encoded-kbd-iso2022-designation-prefix)
(define-key map "@" 'encoded-kbd-iso2022-designation)
(define-key map "A" 'encoded-kbd-iso2022-designation)
(define-key map "B" 'encoded-kbd-iso2022-designation)
map)
"Keymap for handling ESC $ sequence in Encoded-kbd mode.")
(fset 'encoded-kbd-iso2022-esc-dollar-prefix
encoded-kbd-iso2022-esc-dollar-map)
(defvar encoded-kbd-iso2022-designation-map
(let ((map (make-sparse-keymap))
(l charset-list)
final-char)
(while l
(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)
(setq i 160)
(while (< i 256)
(define-key map (vector i) 'encoded-kbd-handle-8bit)
(setq i (1+ i)))
map)
"Keymap for handling non-ASCII character set in Encoded-kbd mode.")
(defvar encoded-kbd-coding nil)
(defvar encoded-kbd-iso2022-designations nil)
(put 'encoded-kbd-iso2022-designations 'permanent-local t)
(defvar encoded-kbd-iso2022-invocations nil)
(put 'encoded-kbd-iso2022-invocations 'permanent-local t)
(defun encoded-kbd-iso2022-designation ()
"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))
(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)
(setq intermediate-char (aref key-seq 2)
dimension 2
chars (if (< intermediate-char ?,) 94 96)
final-char (aref key-seq 3)
reg (mod intermediate-char 4))
(if (= (aref key-seq 1) ?$)
(setq dimension 2
chars 94
final-char (aref key-seq 2)
reg 0)
(setq intermediate-char (aref key-seq 1)
dimension 1
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))
(if (not (memq prev-g0-charset '(ascii latin-jisx0201)))
(throw 'exit nil))
(if (memq prev-g0-charset '(ascii latin-jisx0201))
(let ((overriding-local-map encoded-kbd-iso2022-non-ascii-map))
(recursive-edit))))))
(defun encoded-kbd-handle-8bit ()
"Handle an 8-bit character entered 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))))
(char (if (= (charset-dimension charset) 1)
(make-char charset last-command-char)
(make-char charset last-command-char (read-char-exclusive)))))
(aset encoded-kbd-iso2022-invocations 2 nil)
(setq unread-command-events (cons char unread-command-events))))
(defun encoded-kbd-self-insert-iso2022-8bit ()
(interactive)
(cond
((= last-command-char ?\216) (aset encoded-kbd-iso2022-invocations 2 2))
((= last-command-char ?\217) (aset encoded-kbd-iso2022-invocations 2 3))
(t
(let* ((charset (aref encoded-kbd-iso2022-designations
(or (aref encoded-kbd-iso2022-invocations 2)
(aref encoded-kbd-iso2022-invocations 1))))
(char (if (= (charset-dimension charset) 1)
(make-char charset last-command-char)
(make-char charset last-command-char
(read-char-exclusive)))))
(aset encoded-kbd-iso2022-invocations 2 nil)
(setq unread-command-events (cons char unread-command-events))))))
(defun encoded-kbd-self-insert-sjis ()
(interactive)
(let ((char (if (or (< last-command-char ?\xA0) (>= last-command-char ?\xE0))
(decode-sjis-char (+ (ash last-command-char 8)
(read-char-exclusive)))
(make-char 'katakana-jisx0201 last-command-char))))
(setq unread-command-events (cons char unread-command-events))))
(defun encoded-kbd-self-insert-big5 ()
(interactive)
(let ((char (decode-big5-char (+ (ash last-command-char 8)
(read-char-exclusive)))))
(setq unread-command-events (cons char unread-command-events))))
(defun encoded-kbd-self-insert-ccl ()
(interactive)
(let ((str (char-to-string last-command-char))
(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))))
(setq unread-command-events
(append result unread-command-events))))
(defun encoded-kbd-setup-keymap (coding)
(setcdr encoded-kbd-mode-map nil)
(cond
((eq encoded-kbd-coding 'sjis)
(let ((i 128))
(while (< i 256)
(define-key encoded-kbd-mode-map
(vector i) 'encoded-kbd-self-insert-sjis)
(setq i (1+ i)))))
((eq encoded-kbd-coding 'big5)
(let ((i 161))
(while (< i 255)
(define-key encoded-kbd-mode-map
(vector i) 'encoded-kbd-self-insert-big5)
(setq i (1+ i)))))
((eq encoded-kbd-coding 'iso2022-7)
(define-key encoded-kbd-mode-map "\e" 'encoded-kbd-iso2022-esc-prefix))
((eq encoded-kbd-coding 'iso2022-8)
(define-key encoded-kbd-mode-map
(vector ?\216) 'encoded-kbd-self-insert-iso2022-8bit)
(define-key encoded-kbd-mode-map
(vector ?\217) 'encoded-kbd-self-insert-iso2022-8bit)
(let ((i 160))
(while (< i 256)
(define-key encoded-kbd-mode-map
(vector i) 'encoded-kbd-self-insert-iso2022-8bit)
(setq i (1+ i)))))
((eq encoded-kbd-coding 'ccl)
(let ((valid-codes (or (coding-system-get coding 'valid-codes)
'((128 . 255))))
elt from to)
(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 encoded-kbd-mode-map
(vector from) 'encoded-kbd-self-insert-ccl))
(setq from (1+ from))))))
(t
(error "Invalid value in encoded-kbd-coding: %s" encoded-kbd-coding))))
(defvar saved-input-mode nil)
(defun encoded-kbd-mode (&optional arg)
"Toggle Encoded-kbd minor mode.
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]."
(if encoded-kbd-mode
(apply 'set-input-mode saved-input-mode))
(setq encoded-kbd-mode
(if (null arg) (null encoded-kbd-mode)
(> (prefix-numeric-value arg) 0)))
(if encoded-kbd-mode
(let ((coding (keyboard-coding-system)))
(setq saved-input-mode (current-input-mode))
(cond ((null coding)
(setq encoded-kbd-mode nil)
(error "No coding system for keyboard input is set"))
((= (coding-system-type coding) 1) (set-input-mode
(nth 0 saved-input-mode) (nth 1 saved-input-mode)
'use-8th-bit (nth 3 saved-input-mode))
(setq encoded-kbd-coding 'sjis))
((= (coding-system-type coding) 2) (if (aref (coding-system-flags coding) 7) (setq encoded-kbd-coding 'iso2022-7)
(set-input-mode
(nth 0 saved-input-mode) (nth 1 saved-input-mode)
'use-8th-bit (nth 3 saved-input-mode))
(setq encoded-kbd-coding 'iso2022-8))
(setq encoded-kbd-iso2022-designations (make-vector 4 nil))
(let ((flags (coding-system-flags coding))
(i 0))
(while (< i 4)
(if (charsetp (aref flags i))
(aset encoded-kbd-iso2022-designations i
(aref flags i))
(if (charsetp (car-safe (aref flags i)))
(aset encoded-kbd-iso2022-designations i
(car (aref flags i)))))
(setq i (1+ i))))
(setq encoded-kbd-iso2022-invocations (make-vector 3 nil))
(aset encoded-kbd-iso2022-invocations 0 0)
(aset encoded-kbd-iso2022-invocations 1 1))
((= (coding-system-type coding) 3) (set-input-mode
(nth 0 saved-input-mode) (nth 1 saved-input-mode)
'use-8th-bit (nth 3 saved-input-mode))
(setq encoded-kbd-coding 'big5))
((= (coding-system-type coding) 4) (set-input-mode
(nth 0 saved-input-mode) (nth 1 saved-input-mode)
'use-8th-bit (nth 3 saved-input-mode))
(setq encoded-kbd-coding 'ccl))
(t
(setq encoded-kbd-mode nil)
(error "Coding-system `%s' is not supported in Encoded-kbd mode"
(keyboard-coding-system))))
(encoded-kbd-setup-keymap coding)
(run-hooks 'encoded-kbd-mode-hook))))