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its.el
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;;; its.el --- Input Translation System AKA "ITS(uDekirunDa!)"
;; Copyright (C) 1999,2000 PFU LIMITED
;; Author: NIIBE Yutaka <gniibe@chroot.org>
;; KATAYAMA Yoshio <kate@pfu.co.jp>
;; Maintainer: TOMURA Satoru <tomura@etl.go.jp>
;; Keywords: mule, multilingual, input method
;; This file is part of EGG.
;; EGG 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 2, or (at your option)
;; any later version.
;; EGG 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; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Commentary:
;;; Code:
(eval-when-compile
(require 'cl))
(require 'egg-edep)
(defgroup its nil
"Input Translation System of Tamago 4."
:group 'egg)
(defcustom its-enable-fullwidth-alphabet t
"*Enable fullwidth symbol input."
:group 'its :type 'boolean)
(defcustom its-barf-on-invalid-keyseq nil
"*Don't allow invalid key sequence in input buffer, if non-NIL."
:group 'its :type 'boolean)
(defcustom its-delete-by-keystroke nil
"*Delete characters as if cancel input keystroke, if nin-NIL.
This variable is overriden by `its-delete-by-character'."
:group 'its :type 'boolean)
(defcustom its-delete-by-character nil
"*Delete a character as a unit even if just after input, if nin-NIL.
This variable override `its-delete-by-keystroke'."
:group 'its :type 'boolean)
(defcustom its-fence-invisible nil
"*Make fences invisible, if nin-NIL."
:group 'its :type 'boolean)
(defcustom its-fence-open "|"
"*String of fence start mark. (should not be null string)"
:group 'its :type '(string :valid-regexp ".+"))
(defcustom its-fence-continue "+"
"*String of fence start mark. (should not be null string)"
:group 'its :type '(string :valid-regexp ".+"))
(defcustom its-fence-close "|"
"*String of fence end mark. (should not be null string)"
:group 'its :type '(string :valid-regexp ".+"))
(defcustom its-fence-face nil
"*Face (or alist of languages and faces) of text in fences."
:group 'its
:type '(choice face
(repeat :tag "Language-Face alist"
(cons :tag "Language-Face"
(choice :tag "Language"
(const Japanese)
(const Chinese-GB)
(const Chinese-CNS)
(const Korean)
(const :tag "Default" t)
(symbol :tag "Other"))
face))))
(defvar its-current-map nil)
(make-variable-buffer-local 'its-current-map)
(put 'its-current-map 'permanent-local t)
(defvar its-current-select-func nil)
(make-variable-buffer-local 'its-current-select-func)
(put 'its-current-select-func 'permanent-local t)
(defvar its-previous-select-func nil)
(make-variable-buffer-local 'its-previous-select-func)
(put 'its-previous-select-func 'permanent-local t)
(defvar its-current-language nil)
(make-variable-buffer-local 'its-current-language)
(put 'its-current-language 'permanent-local t)
;; Data structure in ITS
;; (1) SYL and CURSOR
;;
;; "SYL" stands for something like a syllable.
;;
;; <SYL> ::= ( <output> . ( <keyseq> . <terminal> )) ; Determined: DSYL
;; | <state> ; Intermediate: ISYL
;; | ( <output> . <point> ) ; Verbatim: VSYL
;; | nil ; None
;;
;; ;<state> ::=
;; ; ( <output> . ( <keyseq> . <key-state-table/terminal> ))
;;
;; <keyseq> ::= "string" of key sequence
;; <output> ::= "string"
;;
;; <point> ::= integer which specifies point
;;
;; <cursor> ::= nil ; Previous SYL is active (input will go that SYL)
;; | t ; input makes new SYL. DEL deletes previous SYL
;; | its-cursor ; DEL breaks previous SYL, input makes new SYL
;; Data structures in ITS
;; (2) State machine which recognizes SYL
;;
;; <state> ::= ( <output> <keyseq> . <key-state-table/terminal> )
;;
;; <key-state-table/terminal> ::= <key-state-table> ; intermediate state
;; | <terminal> ; terminal state
;;
;; <key-state-table> ::= ( <key-state-alist> . <expr-output-back-list> )
;; <key-state-alist> ::= ( <key-state> ... )
;; <key-state> ::= ( <key> . <state> )
;; <key> ::= Positive INTEGER which specifies KEY STROKE
;; | -1 ; means END of key stroke
;;
;; Only applicable for last transition.
;; <expr-output-back-list> ::= ( (<output> . (<keyexpr> . <howmanyback>))... )
;; <keyexpr> ::= something like "[a-z]" which specifies class of key.
;; | NIL; means ANY of key (except END of the key stroke)
;;
;;
;; <keyseq> ::= "string"
;;
;; <terminal> ::= nil
;; | <howmanyback>
;;
;; <howmanyback> ::= integer which specifies how many key strokes we go back
;;
;; <output> ::= "string"
;; Data structure in ITS (3) Map
;;
;; <map> ::= ( <name> <indicator> <language> . <start-state> )
;; <name> ::= "string"
;; <indicator> ::= "string"
;; <language> ::= "string"
;; <start-state> ::= <state>
;;
(defsubst its-new-state (output keyseq back)
(cons output (cons keyseq back)))
(defsubst its-new-map (name indicator language)
(cons name (cons indicator (cons language (its-new-state "" "" nil)))))
(defsubst its-get-indicator (map)
(nth 1 map))
(defsubst its-get-language (map)
(nth 2 map))
(defsubst its-get-start-state (map)
(nthcdr 3 map))
(defsubst its-get-kst/t (state)
(cdr (cdr state)))
(defsubst its-set-kst (state kst)
(setcdr (cdr state) kst))
(defsubst its-get-keyseq (state)
(car (cdr state)))
(defsubst its-set-keyseq (state keyseq)
(setcar (cdr state) keyseq))
(defun its-get-keyseq-cooked (state)
(let ((keyseq (its-get-keyseq state))
(back (its-get-kst/t state)))
(if back
(substring keyseq 0 back)
keyseq)))
(defsubst its-kst-p (kst/t)
(not (or (numberp kst/t) (null kst/t))))
(defun its-get-output (syl/state &optional no-eval)
(setq syl/state (car syl/state))
(cond ((null (consp syl/state))
syl/state)
((and (null no-eval) (eq (car syl/state) 'eval))
(eval (mapcar (lambda (s) (if (stringp s) (copy-sequence s) s))
(cdr syl/state))))
(t
(copy-sequence syl/state))))
(defsubst its-set-output (state output)
(setcar state output))
(defsubst its-get-keyseq-syl (syl)
(let ((l (cdr syl)))
(cond ((stringp l) ; DSYL
l)
((numberp l) ; VSYL
(car syl))
((numberp (cdr l))
(substring (car l) 0 (cdr l)))
(t
(car l)))))
(defsubst its-eob-keyexpr (eob)
(car (cdr eob)))
(defsubst its-eob-back (eob)
(cdr (cdr eob)))
(defsubst its-make-class+back (class back)
(cons class back))
(defsubst its-make-otherwise (output class+back)
(cons output class+back))
(defsubst its-DSYL-with-back-p (syl)
(and (consp (cdr syl))
(numberp (its-get-kst/t syl))))
(defsubst its-concrete-DSYL-p (syl)
(stringp (cdr syl)))
(defsubst its-make-concrete-DSYL (syl)
(if (consp (cdr syl))
(cons (its-get-output syl) (its-get-keyseq-syl syl))
syl))
;;
;;
(require 'its-keydef)
(defvar its-mode-map
(let ((map (make-sparse-keymap))
(i 33))
(define-key map "\C-a" 'its-beginning-of-input-buffer)
(define-key map "\C-b" 'its-backward-SYL)
(define-key map "\C-c" 'its-cancel-input)
(define-key map "\C-d" 'its-delete-SYL)
(define-key map "\C-e" 'its-end-of-input-buffer)
(define-key map "\C-f" 'its-forward-SYL)
(define-key map "\C-g" 'its-select-previous-mode)
(define-key map "\C-]" 'its-cancel-input)
(define-key map "\C-h" 'its-mode-help-command)
(define-key map "\C-k" 'its-kill-line)
;; (define-key map "\C-l" 'its-exit-mode)
(define-key map "\C-m" 'its-exit-mode) ; RET
(define-key map [return] 'its-exit-mode)
(define-key map "\C-t" 'its-transpose-chars)
(define-key map "\C-w" 'its-kick-convert-region)
(define-key map "\C-y" 'its-yank)
(define-key map "\M-y" 'its-yank-pop)
(define-key map [backspace] 'its-delete-backward-SYL)
(define-key map [delete] 'its-delete-backward-SYL)
(define-key map [(meta backspace)] 'its-delete-backward-SYL-by-keystroke)
(define-key map [(meta delete)] 'its-delete-backward-SYL-by-keystroke)
(define-key map [right] 'its-forward-SYL)
(define-key map [left] 'its-backward-SYL)
(while (< i 127)
(define-key map (vector i) 'its-self-insert-char)
(setq i (1+ i)))
(define-key map " " 'its-kick-convert-region-or-self-insert)
(define-key map "\177" 'its-delete-backward-SYL)
;;
(define-key map "\M-p" 'its-previous-map)
(define-key map "\M-n" 'its-next-map)
(define-key map "\M-h" 'its-hiragana) ; hiragana-region for input-buffer
(define-key map "\M-k" 'its-katakana)
(define-key map "\M-<" 'its-half-width)
(define-key map "\M->" 'its-full-width)
map)
"Keymap for ITS mode.")
(fset 'its-mode-map its-mode-map)
(defvar its-fence-mode nil)
(make-variable-buffer-local 'its-fence-mode)
(put 'its-fence-mode 'permanent-local t)
(defvar egg-sub-mode-map-alist nil)
(or (assq 'its-fence-mode egg-sub-mode-map-alist)
(setq egg-sub-mode-map-alist (cons '(its-fence-mode . its-mode-map)
egg-sub-mode-map-alist)))
(defun its-enter/leave-fence (&optional old new)
(setq its-fence-mode (its-in-fence-p)))
(add-hook 'egg-enter/leave-fence-hook 'its-enter/leave-fence)
(defconst its-setup-fence-before-insert-SYL nil)
(defun its-get-fence-face (lang)
(if (null (consp its-fence-face))
its-fence-face
(cdr (or (assq lang its-fence-face)
(assq t its-fence-face)))))
(defun its-put-cursor (cursor)
(unless (eq its-barf-on-invalid-keyseq 'its-keyseq-test)
(let ((p (point))
(str (copy-sequence "!")))
(set-text-properties 0 1 (list 'read-only t
'invisible 'egg
'intangible 'its-part-2
'its-cursor cursor
'point-entered 'egg-enter/leave-fence
'point-left 'egg-enter/leave-fence
'modification-hooks '(egg-modify-fence))
str)
(insert str)
(goto-char p))))
(defun its-set-cursor-status (cursor)
(delete-region (point) (1+ (point)))
(its-put-cursor cursor)
cursor)
(defvar its-context nil)
;;
;; +-- START property
;; | --- CURSOR Property
;; | /
;; v v v-- END Property
;; |SYL SYL ^ SYL|
;; ^^^ ^^^ ^^^------ SYL Property
;; <-------><---->
;; intangible intangible
;; 1 2
;;
(defun its-setup-fence-mode ()
(let ((open-props '(its-start t intangible its-part-1))
(close-props '(rear-nonsticky t its-end t intangible its-part-2))
(p (point)) p1)
(if (or (null (stringp its-fence-open)) (zerop (length its-fence-open))
(null (stringp its-fence-continue)) (zerop (length its-fence-continue))
(null (stringp its-fence-close)) (zerop (length its-fence-close)))
(error "invalid fence"))
;; Put open-fence before inhibit-read-only to detect read-only
(insert (if its-context its-fence-continue its-fence-open))
(egg-setup-invisibility-spec)
(let ((inhibit-read-only t))
(setq p1 (point))
(add-text-properties p p1 open-props)
(if its-context
(put-text-property p p1 'its-context its-context))
(insert its-fence-close)
(add-text-properties p1 (point) close-props)
(if its-fence-invisible
(put-text-property p (point) 'invisible 'egg))
(put-text-property p (point) 'read-only t)
(goto-char p1)
(its-define-select-keys its-mode-map t)
(its-put-cursor t))))
(defun its-start (key context)
(let ((its-setup-fence-before-insert-SYL t)
(its-context context))
(its-input nil key)))
(defun its-restart (str set-prop beginning context)
(let ((its-context context)
p)
(its-setup-fence-mode)
(setq p (point))
(put-text-property 0 (length str) 'intangible 'its-part-1 str)
(insert str)
(if set-prop
(progn
(delete-region (point) (1+ (point)))
(its-setup-yanked-portion p (point))))
(if beginning
(its-beginning-of-input-buffer))))
(defun its-self-insert-char ()
(interactive)
(let ((inhibit-read-only t)
(key last-command-char)
(cursor (get-text-property (point) 'its-cursor))
(syl (get-text-property (1- (point)) 'its-syl)))
(cond
((or (eq cursor t)
(not (eq (get-text-property (1- (point)) 'its-map) its-current-map)))
(put-text-property (- (point) (length (its-get-output syl))) (point)
'its-syl (its-make-concrete-DSYL syl))
(setq syl nil))
(cursor
(setq syl nil)))
(its-input syl key)))
(defun its-current-language-length ()
(+ (if (eq (get-text-property (1- (point)) 'egg-lang) its-current-language)
(- (point) (previous-single-property-change (point) 'egg-lang))
0)
(if (eq (get-text-property (1+ (point)) 'egg-lang) its-current-language)
(- (next-single-property-change (1+ (point)) 'egg-lang) (point) 1)
0)))
(defun its-initial-ISYL ()
(its-get-start-state (symbol-value its-current-map)))
(defun its-make-VSYL (keyseq)
(cons keyseq (length keyseq)))
(defun its-input-error ()
(error "Invalid Romaji Sequence"))
(defvar its-stroke-input-alist nil)
(defun its-input (syl key)
(let ((output (car syl))
(k/kk/s (cdr syl))
(stroke (assq its-current-language its-stroke-input-alist)))
(or syl (setq syl (its-initial-ISYL)))
(cond
((numberp k/kk/s)
;; k/kk/s is "point in keyseq"
(its-input-to-vsyl syl key k/kk/s output))
((and (or its-barf-on-invalid-keyseq stroke)
(null (its-keyseq-acceptable-p (vector key) syl)))
;; signal before altering
(its-input-error))
(t
;; It's ISYL
(its-state-machine syl key 'its-buffer-ins/del-SYL)
(if (and stroke (>= (its-current-language-length) (cdr stroke)))
(its-kick-convert-region))))))
(defun its-input-to-vsyl (syl key point output)
(if (< key 0)
(its-set-cursor-status t)
(let ((len (length output)))
(if (= len point)
;; point is at end of VSYL. Don't need to call state machine.
(its-buffer-ins/del-SYL
(its-make-VSYL (concat output (vector key))) syl nil)
;; point is at middle of VSYL.
(let ((new-keyseq (concat (substring output 0 point)
(vector key)
(substring output point))))
(its-state-machine-keyseq new-keyseq 'its-buffer-ins/del-SYL))))))
;;;
;;; ITS State Machine
;;;
(defvar its-disable-special-action nil)
;; Return CURSOR
(defun its-state-machine (state key emit)
(let ((next-state (its-get-next-state state key))
expr-output-back kst/t output keyseq back)
(cond
;; proceed to next status
((and next-state
(not (and its-disable-special-action
(eq (its-get-kst/t next-state) t))))
(setq kst/t (its-get-kst/t next-state)
output (its-get-output next-state)
keyseq (its-get-keyseq next-state))
(cond
;; Special actions.
((eq kst/t t)
(if (stringp output)
(let ((its-current-language t))
(funcall emit (cons output keyseq) state 'its-cursor))
(funcall emit (cons "" keyseq) state 'its-cursor)
(apply (car output) (cdr output))))
;; Still, it's a intermediate state.
((its-kst-p kst/t)
(funcall emit next-state state nil))
;; It's negative integer which specifies how many
;; characters we go backwards
(kst/t
(funcall emit next-state state 'its-cursor)
(its-state-machine-keyseq (substring keyseq kst/t) emit (< key 0)))
;; Here we arrive to a terminal state.
;; Emit a DSYL, and go ahead.
(t
(funcall emit next-state state 'its-cursor))))
;; push back by otherwise status
((and (>= key 0)
(setq expr-output-back (its-get-otherwise state key)))
(setq keyseq (concat (its-get-keyseq state) (vector key))
back (its-eob-back expr-output-back))
(funcall emit
(cons (or (its-get-output expr-output-back)
(its-get-output
(its-goto-state (substring keyseq 0 back))))
(cons keyseq back))
state t)
(its-state-machine-keyseq
(substring keyseq back) emit))
((eq its-barf-on-invalid-keyseq 'its-keyseq-test)
'its-keyseq-test-failed)
;; No next state for KEY. It's invalid sequence.
(its-barf-on-invalid-keyseq
(its-input-error))
(t
;; XXX Should make DSYL (instead of VSYL)?
(setq keyseq (concat (its-get-keyseq state) (if (> key 0) (vector key))))
(funcall emit (its-make-VSYL keyseq) state nil)))))
(defvar its-latest-SYL nil "The latest SYL inserted.")
(defsubst its-update-latest-SYL (syl)
(setq its-latest-SYL syl))
;; Return CURSOR
(defun its-state-machine-keyseq (keyseq emit &optional eol)
(let ((i 0)
(len (length keyseq))
(syl (its-initial-ISYL))
cursor)
(while (< i len)
(cond
((numberp (cdr syl))
;; VSYL - no need looping
(funcall emit
(its-make-VSYL (concat (car syl) (substring keyseq i)))
syl nil)
(setq cursor nil
i len))
(t
(setq cursor (its-state-machine syl (aref keyseq i) emit))))
(if (eq cursor 'its-keyseq-test-failed)
(setq i len)
(setq syl (if cursor (its-initial-ISYL) its-latest-SYL)
i (1+ i))))
(if (and eol (not (eq cursor 'its-keyseq-test-failed)))
(its-state-machine syl -1 emit)
cursor)))
(defun its-buffer-ins/del-SYL (newsyl oldsyl cursor)
(if its-setup-fence-before-insert-SYL
(progn
(setq its-setup-fence-before-insert-SYL nil)
(its-setup-fence-mode)))
(let ((inhibit-read-only t)
(output (copy-sequence (its-get-output newsyl)))
(face (its-get-fence-face its-current-language)))
(its-buffer-delete-SYL oldsyl)
(its-update-latest-SYL newsyl)
(add-text-properties 0 (length output)
(list 'its-map its-current-map
'its-syl newsyl
'egg-lang its-current-language
'read-only t
'intangible 'its-part-1)
output)
(if face
(egg-set-face 0 (length output) face output))
(insert output)
(its-set-cursor-status cursor)))
(defun its-buffer-delete-SYL (syl)
(let ((len (length (its-get-output syl))))
(delete-region (- (point) len) (point))))
(defun its-get-next-state (state key)
(let ((kst/t (its-get-kst/t state)))
(and (listp kst/t)
(cdr (assq key (car kst/t))))))
;; XXX XXX XXX
(defun its-otherwise-match (expr key)
(or (null expr) ; <expr>::= NIL means "ANY"
(let ((case-fold-search nil))
(string-match expr (char-to-string key)))))
(defun its-get-otherwise (state key)
(let* ((kst/t (its-get-kst/t state))
(ebl (cdr kst/t))
expr-output-back)
(while ebl
(setq expr-output-back (car ebl))
(let ((expr (its-eob-keyexpr expr-output-back)))
(if (its-otherwise-match expr key)
(setq ebl nil)
(setq ebl (cdr ebl)))))
expr-output-back))
(defun its-keyseq-acceptable-p (keyseq &optional syl eol)
(let ((i 0)
(len (length keyseq))
(its-barf-on-invalid-keyseq 'its-keyseq-test)
(its-latest-SYL nil)
(emit (lambda (nsyl osyl cursor)
(its-update-latest-SYL nsyl)
cursor))
(its-current-map its-current-map)
(its-current-select-func its-current-select-func)
(its-current-language its-current-language)
(its-zhuyin its-zhuyin)
(its-previous-select-func its-previous-select-func)
cursor)
(if (null syl)
(setq syl (its-initial-ISYL)))
(if (numberp (cdr syl))
nil
(while (and syl (< i len))
(setq cursor (its-state-machine syl (aref keyseq i) emit))
(cond
((eq cursor 'its-keyseq-test-failed)
(setq syl nil))
(cursor
(setq syl (its-initial-ISYL)))
(t
its-latest-SYL))
(setq i (1+ i)))
(if (and syl eol)
(setq cursor (its-state-machine syl -1 emit)))
(not (eq cursor 'its-keyseq-test-failed)))))
;;;
;;; Name --> map
;;;
;;; ITS name: string
(defvar its-map-alist nil)
(defun its-get-map (name)
(assoc name its-map-alist))
(defun its-register-map (map)
(let* ((name (car map))
(place (assoc name its-map-alist)))
(if place
(setcdr place (cdr map))
(setq its-map-alist (cons map its-map-alist)))
map))
(defmacro define-its-state-machine (map name indicator lang doc &rest exprs)
(let ((its-current-map map))
(set map (its-new-map name indicator
(if (eq (car-safe lang) 'quote) (nth 1 lang) lang)))
(eval (cons 'progn exprs))
(set map (its-map-compaction (symbol-value map))))
`(defconst ,map (its-map-rebuild ',(symbol-value map)) ,doc))
(defmacro define-its-state-machine-append (map &rest exprs)
`(let ((func (lambda () (let ((its-current-map ',map)) ,@exprs)))
(hook ',(intern (concat (symbol-name map) "-hook"))))
(if (null (boundp ',map))
(add-hook hook func t)
(funcall func)
(run-hooks hook)
(set hook nil))))
;; Data structure for map compaction
;; <node> ::= (<count> <node#> <original node>) ; atom
;; | (<count> <node#> (<node> . <node>)) ; cons cell
;;
;; <count> ::= integer ; 0 or negative - usage count
;; ; positive - generated common sub-tree
;;
;; <node#> ::= integer ; subject to compaction
;; | nil ; not subject to compaction
(defvar its-compaction-enable nil)
(defvar its-compaction-hash-table)
(defvar its-compaction-integer-table)
(defvar its-compaction-counter-1)
(defvar its-compaction-counter-2)
(defvar its-compaction-list)
(defun its-map-compaction (map)
(if its-compaction-enable
(let ((its-compaction-hash-table (make-vector 1000 nil))
(its-compaction-integer-table (make-vector 138 nil))
(its-compaction-counter-1 1)
(its-compaction-counter-2 0)
(its-compaction-list nil))
(its-map-compaction-internal map nil nil)
(cons (vconcat (nreverse its-compaction-list)) map))
map))
(defmacro its-compaction-set-lr (node lr val)
`(if (eq ,lr 'car) (setcar ,node ,val) (setcdr ,node ,val)))
(defmacro its-compaction-new-node ()
'(1- (setq its-compaction-counter-1 (1+ its-compaction-counter-1))))
(defmacro its-compaction-new-cse (node)
`(1- (setq its-compaction-list (cons ,node its-compaction-list)
its-compaction-counter-2 (1+ its-compaction-counter-2))))
(defmacro its-concat (&rest args)
`(concat ,@(mapcar (lambda (arg)
(if (stringp arg)
arg
`(if (numberp ,arg) (number-to-string ,arg) ,arg)))
args)))
(defmacro its-compaction-hash (name node parent lr type)
(if (null type)
`(let ((hash (intern (its-concat ,@name) its-compaction-hash-table)))
(if (null (boundp hash))
(car (set hash (list* (its-compaction-new-node) ,parent ,lr)))
(setq hash (symbol-value hash))
(if (consp (cdr hash))
(setcdr hash (its-compaction-set-lr
(cadr hash) (cddr hash)
(its-compaction-new-cse ,node))))
(its-compaction-set-lr ,parent ,lr (cdr hash))
(car hash)))
`(let ((hash ,(if (eq type 'integer)
`(intern (its-concat ,@name) its-compaction-hash-table)
`(aref its-compaction-integer-table (+ ,node 10)))))
(if (null ,(if (eq type 'integer) '(boundp hash) 'hash))
(setq hash (,@(if (eq type 'integer)
'(set hash)
`(aset its-compaction-integer-table (+ ,node 10)))
(cons (its-compaction-new-node)
(its-compaction-new-cse ,node))))
,(if (eq type 'integer) '(setq hash (symbol-value hash))))
(its-compaction-set-lr ,parent ,lr (cdr hash))
(car hash))))
(defun its-map-compaction-internal (map parent lr &optional force)
(cond
((consp map)
(let* ((candidate (or (null (stringp (car map))) (cdr map)))
(sexp (or force (eq (car map) 'eval)))
(l (its-map-compaction-internal (car map) map 'car sexp))
(r (its-map-compaction-internal (cdr map) map 'cdr sexp)))
(if (or sexp (and candidate l r))
(its-compaction-hash (l " " r) map parent lr nil))))
((stringp map)
(its-compaction-hash ("STR" map) map parent lr nil))
((integerp map)
(if (and (>= map -10) (< map 128))
(its-compaction-hash nil map parent lr small-int)
(its-compaction-hash ("INT" map) map parent lr integer)))
((null map) 0)
((symbolp map)
(its-compaction-hash ("SYM" (symbol-name map)) map parent lr nil))))
(defvar its-map-rebuild-subtrees)
(defun its-map-rebuild (map)
(if (vectorp (car map))
(let ((its-map-rebuild-subtrees (car map))
(len (length (car map)))
(i 0)
node)
(while (< i len)
(setq node (aref its-map-rebuild-subtrees i))
(if (consp node)
(its-map-rebuild-1 node))
(setq i (1+ i)))
(its-map-rebuild-1 (cdr map))
(cdr map))
map))
(defun its-map-rebuild-1 (map)
(let (lr)
(while (consp map)
(if (consp (setq lr (car map)))
(its-map-rebuild-1 lr)
(if (integerp lr)
(setcar map (aref its-map-rebuild-subtrees lr))))
(setq lr map
map (cdr map)))
(if (integerp map)
(setcdr lr (aref its-map-rebuild-subtrees map)))))
;;
;; Construct State Machine
;;
(defun its-defrule (input output &optional back enable-overwrite)
"$BF~NO(B INPUT $B$rG'<1$7(B, OUTPUT $B$r=PNO$9$k$h$&$K%9%F!<%H%^%7%s$r9=@.$9$k!#(B
BACK $B$,(B($BIi$N(B)$B@0?t$N;~$O(B, OUTPUT $B$r=PNO$7$?8e(B, BACK $B$NJ,(B key stroke $B$r(B
$BLa$C$FF0$/$b$N$H$9$k!#JQ495,B'$O$b$C$H$b:G6a$K(B its-define-state-machine
$B$5$l$?JQ49I=$KEPO?$5$l$k!#(B
Return last state."
(let ((state (its-goto-state input (if enable-overwrite t 'dup-check))))
(its-set-output state output)
(its-set-kst state back)
state))
(defun its-defrule* (input output &optional interim-output enable-overwrite)
(let* ((state (its-goto-state input (if enable-overwrite t 'dup-check))))
(its-set-kst state nil)
(its-set-interim-terminal-state state output)
(if interim-output
(its-set-output state interim-output))
state))
(defvar its-parent-states)
(defun its-goto-state (input &optional build-if-none)
(let ((len (length input))
(i 0)
(state (its-initial-ISYL))
brand-new next-state key)
(setq its-parent-states nil)
(while (< i len)
(setq its-parent-states (cons state its-parent-states)
key (aref input i)
i (1+ i)
next-state (its-get-next-state state key))
(cond
(next-state
(setq state next-state))
((null build-if-none)
(error "No such state (%s)" input))
(t
(if (not (or brand-new (= i 1) (its-get-kst/t state)))
(its-set-interim-terminal-state state))
(setq state (its-make-next-state state key
(concat (its-get-output state)
(list key)))
brand-new t))))
(if (and (eq build-if-none 'dup-check) (null brand-new))
(error "Duplicated definition (%s)" input))
state))
(defun its-set-interim-terminal-state (state &optional output)
(its-make-next-state state -1 (or output (its-get-output state t)))
(its-defrule-otherwise state output))
(defun its-defoutput (input display)
(let ((state (its-goto-state input)))
(its-set-output state display)))
(defun its-define-otherwise (state otherwise)
(let ((kst (its-get-kst/t state)))
(if kst
(setcdr kst (cons otherwise (cdr kst)))
(its-set-kst state (cons nil (cons otherwise nil))))))
(defun its-defrule-otherwise (state output &optional class back)
(its-define-otherwise
state
(its-make-otherwise output (its-make-class+back class (or back -1)))))
(defun its-make-next-state (state key output &optional back)
(let ((next-state (its-new-state output
(concat (its-get-keyseq state)
(if (> key 0) (list key)))
back))
(kst (its-get-kst/t state)))
(cond
((null kst)
(its-set-kst state (list (list (cons key next-state)))))
((consp kst)
(setcar kst (cons (cons key next-state) (car kst))))
(t
(error "Can't make new state after %S" (its-get-keyseq state))))
next-state))
(defmacro its-defrule-select-mode-temporally (input select-func)
`(its-defrule ,input '(its-select-mode-temporally
,(intern (concat "its-select-"
(symbol-name select-func))))
t))
;;;
(defun its-set-part-1 (beg end)
(let ((inhibit-point-motion-hooks t)
(str (buffer-substring beg end)))
(goto-char beg)
(delete-region beg end)
(put-text-property 0 (- end beg) 'intangible 'its-part-1 str)
(insert str)))
(defun its-set-part-2 (beg end)
(let ((inhibit-point-motion-hooks t)
(str (buffer-substring beg end)))
(goto-char beg)
(delete-region beg end)
(put-text-property 0 (- end beg) 'intangible 'its-part-2 str)
(insert str)))
(defun its-search-beginning ()
(if (get-text-property (1- (point)) 'its-start)
(point)
(previous-single-property-change (point) 'its-start)))
(defun its-search-end ()
(if (get-text-property (point) 'its-end)
(point)
(next-single-property-change (point) 'its-end)))
(defun its-beginning-of-input-buffer ()
(interactive)
(let ((inhibit-read-only t))
(its-input-end)
(let ((begpos (its-search-beginning)))
(its-set-part-2 begpos (point))
(goto-char begpos))
(its-put-cursor t)))
(defun its-end-of-input-buffer ()
(interactive)
(let ((inhibit-read-only t))
(its-input-end)
(let ((endpos (its-search-end)))
(its-set-part-1 (point) endpos)
(goto-char endpos))
(its-put-cursor t)))
(defun its-kill-line (n)
(interactive "p")
(let ((inhibit-read-only t))
(its-input-end)
(if (> n 0)
(if (= (its-search-beginning) (point))
(its-cancel-input)
(delete-region (its-search-end) (point))
(its-put-cursor t))
(if (= (its-search-end) (point))
(its-cancel-input)
(delete-region (its-search-beginning) (point))
(its-put-cursor t)))))
(defun its-cancel-input ()
(interactive)
(let ((inhibit-read-only t))
(delete-region (its-search-beginning) (its-search-end))
(its-put-cursor t)
(its-exit-mode-internal)))
;; TODO: move in VSYL
(defun its-backward-SYL (n)
(interactive "p")
(let ((inhibit-read-only t)
syl p old-point)
(its-input-end)
(setq syl (get-text-property (1- (point)) 'its-syl)
p (point)
old-point (point))
(while (and syl (> n 0))
(setq p (- p (length (its-get-output syl))))
(setq syl (get-text-property (1- p) 'its-syl))
(setq n (1- n)))
;; Make SYLs have property of "part 2"
(its-set-part-2 p old-point)
(goto-char p)
(its-put-cursor t)
(if (> n 0)
(signal 'beginning-of-buffer nil))))
;; TODO: move in VSYL
(defun its-forward-SYL (n)
(interactive "p")
(let ((inhibit-read-only t)
syl p old-point)
(its-input-end)
(setq syl (get-text-property (point) 'its-syl)
p (point)
old-point (point))
(while (and syl (> n 0))
(setq p (+ p (length (its-get-output syl))))
(setq syl (get-text-property p 'its-syl))
(setq n (1- n)))
;; Make SYLs have property of "part 1"
(its-set-part-1 old-point p)
(goto-char p)
(its-put-cursor t)
(if (> n 0)
(signal 'end-of-buffer nil))))
;; TODO: handle VSYL. KILLFLAG
(defun its-delete-SYL (n killflag)
(interactive "p\nP")
(let ((inhibit-read-only t)
syl p)
(its-input-end)
(setq syl (get-text-property (point) 'its-syl)