+++ /dev/null
-;;; encoded-kb.el --- handler to input multibyte characters encoded somehow
-
-;; Copyright (C) 1997, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
-;; Free Software Foundation, Inc.
-;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
-;; 2005, 2006, 2007, 2008, 2009
-;; National Institute of Advanced Industrial Science and Technology (AIST)
-;; Registration Number H14PRO021
-;; Copyright (C) 2003
-;; National Institute of Advanced Industrial Science and Technology (AIST)
-;; Registration Number H13PRO009
-
-;; 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 3 of the License, 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. If not, see <http://www.gnu.org/licenses/>.
-
-;;; Commentary:
-
-;;; Code:
-
-;; 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
-;; input-decode-map take effect.
-(defconst encoded-kbd-mode-map (make-sparse-keymap)
- "Keymap for Encoded-kbd minor mode.")
-
-;; Subsidiary keymaps for handling ISO2022 escape sequences.
-
-(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)
-
-;; 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)
-(put 'encoded-kbd-iso2022-designations 'permanent-local t)
-
-;; 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)
-(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)
- ;; ESC $ <intermediate-char> <final-char>
- (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) ?$)
- ;; ESC $ <final-char>
- (setq dimension 2
- chars 94
- final-char (aref key-seq 2)
- reg 0)
- ;; ESC <intermediate-char> <final-char>
- (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 (coding-system-get (keyboard-coding-system) :ccl-decoder))
- (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))))
-
-
-;; Decode list of codes in CODE-LIST by CHARSET and return the decoded
-;; characters. If CODE-LIST is too short for the dimension of
-;; CHARSET, read new codes and append them to the tail of CODE-LIST.
-;; Return nil if CODE-LIST can't be decoded.
-
-(defun encoded-kbd-decode-code-list (charset code-list)
- (let ((dimension (charset-dimension charset))
- code)
- (while (> dimension (length code-list))
- (nconc code-list (list (read-char-exclusive))))
- (setq code (car code-list))
- (if (= dimension 1)
- (decode-char charset code)
- (setq code-list (cdr code-list)
- code (logior (lsh code 8) (car code-list)))
- (if (= dimension 2)
- (decode-char charset code)
- (setq code-list (cdr code-list)
- code (logior (lsh code 8) (car code-list)))
- (if (= dimension 3)
- (decode-char charset code)
- ;; As Emacs can't handle full 32-bit integer, we must give a
- ;; cons of higher and lower 16-bit codes to decode-char.
- (setq code (cons (lsh code -8)
- (logior (lsh (car code-list) 8) (cadr code-list))))
- (decode-char charset code))))))
-
-(defun encoded-kbd-self-insert-charset (ignore)
- (let ((charset-list
- (coding-system-get (keyboard-coding-system) :charset-list))
- (code-list (list (encoded-kbd-last-key)))
- tail char)
- (while (and charset-list (not char))
- (setq char (encoded-kbd-decode-code-list (car charset-list) code-list)
- charset-list (cdr charset-list)))
- (if char
- (vector char)
- (setq unread-command-events (cdr code-list))
- (vector (car code-list)))))
-
-(defun encoded-kbd-self-insert-utf-8 (arg)
- (interactive "p")
- (let* ((lead (encoded-kbd-last-key))
- (char lead)
- len event)
- (cond ((< char #xE0)
- (setq len 1 char (logand char #x1F)))
- ((< char #xF0)
- (setq len 2 char (logand char #x0F)))
- ((< char #xF8)
- (setq len 3 char (logand char #x07)))
- (t
- (setq len 4 char 0)))
- (while (> len 0)
- (setq event (read-char-exclusive))
- (if (and (>= event #x80) (< event #xc0))
- ;; Valid utf-8 sequence.
- (setq char (logior (lsh char 6) (- event #x80))
- len (1- len))
- ;; Invalid utf-8 sequence. Might be because Quail got involved
- ;; in-between and the bytes we thought we were reading were actually
- ;; latin-1 chars. Let's presume that `event' is the second "byte",
- ;; i.e. there weren't any "apprently correct" between `lead' and
- ;; `event': it's easy to recover in this case, and the more general
- ;; case seems pretty unlikely.
- ;; FIXME: We should really do encoded-kbd decoding before processing
- ;; input-methods.
- (push event unread-command-events)
- (setq char lead)
- (setq len 0)))
- (vector char)))
-
-(defun encoded-kbd-setup-keymap (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) 'shift-jis)
- (let ((i 128))
- (while (< i 256)
- (define-key keymap
- (vector i) 'encoded-kbd-self-insert-sjis)
- (setq i (1+ i))))
- 8)
-
- ((eq (coding-system-type coding) 'big5)
- (let ((i 128))
- (while (< i 256)
- (define-key keymap
- (vector i) 'encoded-kbd-self-insert-big5)
- (setq i (1+ i))))
- 8)
-
- ((eq (coding-system-type coding) 'charset)
- (dolist (elt (mapcar
- #'(lambda (x)
- (let ((dim (charset-dimension x))
- (code-space (get-charset-property x :code-space)))
- (cons (aref code-space (* (1- dim) 2))
- (aref code-space (1+ (* (1- dim) 2))))))
- (coding-system-get coding :charset-list)))
- (let ((from (max (car elt) 128))
- (to (cdr elt)))
- (while (<= from to)
- (define-key keymap
- (vector from) 'encoded-kbd-self-insert-charset)
- (setq from (1+ from)))))
- 8)
-
- ((eq (coding-system-type coding) 'iso-2022)
- (let ((flags (coding-system-get coding :flags))
- (designation (coding-system-get coding :designation)))
- (if (memq 'locking-shift flags)
- 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 designation i)
- (if (charsetp (aref designation i))
- (aset encoded-kbd-iso2022-designations
- i (aref designation i))
- (if (charsetp (car-safe (aref designation i)))
- (aset encoded-kbd-iso2022-designations
- i (car (aref designation i)))))))
- (aset encoded-kbd-iso2022-invocations 0 0)
- (if (aref encoded-kbd-iso2022-designations 1)
- (aset encoded-kbd-iso2022-invocations 1 1))
- (when (memq 'designation flags)
- (define-key encoded-kbd-mode-map "\e" 'encoded-kbd-iso2022-esc-prefix)
- (define-key keymap "\e" 'encoded-kbd-iso2022-esc-prefix))
- (when (or (aref designation 2) (aref designation 3))
- (define-key keymap
- [?\216] 'encoded-kbd-iso2022-single-shift)
- (define-key keymap
- [?\217] 'encoded-kbd-iso2022-single-shift))
- (or (eq (aref designation 0) 'ascii)
- (dotimes (i 96)
- (define-key keymap
- (vector (+ 32 i)) 'encoded-kbd-self-insert-iso2022-7bit)))
- (if (memq '7-bit flags)
- t
- (dotimes (i 96)
- (define-key keymap
- (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)
- '((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 keymap
- (vector from) 'encoded-kbd-self-insert-ccl))
- (setq from (1+ from))))
- 8))
-
- ((eq (coding-system-type coding) 'utf-8)
- (let ((i #xC0))
- (while (< i 256)
- (define-key keymap
- (vector i) 'encoded-kbd-self-insert-utf-8)
- (setq i (1+ i))))
- 8)
-
- (t
- nil)))
-
-;;;###autoload
-(defun encoded-kbd-setup-display (terminal)
- "Set up a `input-decode-map' for `keyboard-coding-system' on TERMINAL.
-
-TERMINAL may be a terminal id, a frame, or nil for the selected frame's terminal."
- (let ((frame (if (framep terminal)
- terminal
- (car (frames-on-display-list terminal)))))
- (when frame
- (with-selected-frame frame
- ;; Remove any previous encoded-kb keymap from input-decode-map.
- (let ((m input-decode-map)
- (child nil))
- (while (keymapp m)
- (if (not (equal (keymap-prompt m) "encoded-kb"))
- (progn
- (setq child m)
- (setq m (keymap-parent m)))
- ;; We've found an encoded-kb map, but maybe the prompt we get
- ;; is really inherited from the encoded-kb map.
- (let (mp)
- (while (and (keymapp (setq mp (keymap-parent m)))
- (equal (keymap-prompt mp) "encoded-kb"))
- (setq child m)
- (setq m mp))
- ;; (assert (equal (keymap-prompt m) "encoded-kb"))
- ;; (assert (eq mp (keymap-parent m)))
- ;; (assert (not (and (keymapp mp)
- ;; (equal (keymap-prompt mp) "encoded-kb"))))
- ;; (assert (eq m (if child
- ;; (keymap-parent child) input-decode-map)))
- ;; We can finally do the actual removal.
- (if child
- (set-keymap-parent child mp)
- (setq input-decode-map mp))
- (setq m mp))))))
-
- (if (keyboard-coding-system)
- ;; We are turning on Encoded-kbd mode.
- (let ((coding (keyboard-coding-system))
- (keymap (make-sparse-keymap "encoded-kb"))
- (cim (current-input-mode))
- result)
- ;; Place `keymap' as the immediate parent of input-decode-map
- ;; rather than on top, so that later `define-key' on
- ;; input-decode-map don't end up accidentally changing our
- ;; part of the keymap, which would lead to bugs when/if we later
- ;; on remove that part.
- (set-keymap-parent keymap (keymap-parent input-decode-map))
- (set-keymap-parent input-decode-map keymap)
- (unless (terminal-parameter nil 'encoded-kbd-saved-input-meta-mode)
- (set-terminal-parameter nil 'encoded-kbd-saved-input-mode
- (nth 2 cim)))
- (setq result (and coding (encoded-kbd-setup-keymap keymap coding)))
- (if result
- (when (and (eq result 8)
- (memq (nth 2 cim) '(t nil)))
- (set-input-meta-mode 'use-8th-bit))
- (set-terminal-parameter
- nil 'encoded-kbd-saved-input-meta-mode nil)
- (error "Unsupported coding system in Encoded-kbd mode: %S"
- coding)))
- ;; We are turning off Encoded-kbd mode.
- (let ((old (terminal-parameter nil 'encoded-kbd-saved-input-meta-mode)))
- (when (and old (not (equal (nth 2 (current-input-mode)) old)))
- (set-input-meta-mode old))
- (set-terminal-parameter
- nil 'encoded-kbd-saved-input-meta-mode nil))))))
-
-(provide 'encoded-kb)
-
-;; arch-tag: 76f0f9b3-65e7-45c3-b692-59509a87ad44
-;;; encoded-kb.el ends here
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