(defconst encoded-kbd-mode-map (make-sparse-keymap)
"Keymap for Encoded-kbd minor mode.")
(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-designations nil)
(put 'encoded-kbd-iso2022-designations 'permanent-local t)
(defvar encoded-kbd-iso2022-invocations nil)
(put 'encoded-kbd-iso2022-invocations 'permanent-local t)
(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."
(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)
(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))))
(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 (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)
(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)
(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)
(define-key encoded-kbd-mode-map "\e" nil)
(cond
((eq (coding-system-type coding) 1) (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) (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) (let ((flags (coding-system-flags coding))
use-designation)
(if (aref flags 8)
nil (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) (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)))
(defvar saved-key-translation-map nil)
(defvar saved-input-mode nil)
(put 'encoded-kbd-mode 'permanent-local t)
(define-minor-mode encoded-kbd-mode
"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]."
:global t :group 'keyboard :group 'mule
(if 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)))
(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)