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- ;;;
- ;;; Copyright (c) 1985 Massachusetts Institute of Technology
- ;;;
- ;;; This material was developed by the Scheme project at the
- ;;; Massachusetts Institute of Technology, Department of
- ;;; Electrical Engineering and Computer Science. Permission to
- ;;; copy this software, to redistribute it, and to use it for any
- ;;; purpose is granted, subject to the following restrictions and
- ;;; understandings.
- ;;;
- ;;; 1. Any copy made of this software must include this copyright
- ;;; notice in full.
- ;;;
- ;;; 2. Users of this software agree to make their best efforts (a)
- ;;; to return to the MIT Scheme project any improvements or
- ;;; extensions that they make, so that these may be included in
- ;;; future releases; and (b) to inform MIT of noteworthy uses of
- ;;; this software.
- ;;;
- ;;; 3. All materials developed as a consequence of the use of
- ;;; this software shall duly acknowledge such use, in accordance
- ;;; with the usual standards of acknowledging credit in academic
- ;;; research.
- ;;;
- ;;; 4. MIT has made no warrantee or representation that the
- ;;; operation of this software will be error-free, and MIT is
- ;;; under no obligation to provide any services, by way of
- ;;; maintenance, update, or otherwise.
- ;;;
- ;;; 5. In conjunction with products arising from the use of this
- ;;; material, there shall be no use of the name of the
- ;;; Massachusetts Institute of Technology nor of any adaptation
- ;;; thereof in any advertising, promotional, or sales literature
- ;;; without prior written consent from MIT in each case.
- ;;;
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
- ;;;
- ;;; Modified by Texas Instruments Inc 8/15/85
- ;;;
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
-
- ;;;; Command Tables
-
- (define comtab '(()()))
- (define default-key #F)
-
- (define (%set-comtab-key comtab char command)
- (vector-set! (cdr comtab) (char->integer char) command))
-
- (define (%set-comtab-entry! alists char command)
- (let ((entry (assq char (cdr alists))))
- (if entry
- (set-cdr! entry command)
- (set-cdr! alists (cons (cons char command) (cdr alists))))))
-
- (define (%comtab-make-prefix-char! alists char alists*)
- (let ((entry (assq char (car alists))))
- (if entry
- (set-cdr! entry alists*)
- (set-car! alists (cons (cons char alists*) (car alists))))))
-
- (define (comtab-lookup-prefix char receiver)
- (define (loop char->alist chars)
- (let ((entry (assq (car chars) char->alist)))
- (if entry
- (if (null? (cddr chars))
- (receiver (cdr entry) (cadr chars))
- (loop (cadr entry) (cdr chars)))
- (error "Not a prefix character" (car chars)))))
- (cond ((char? char)
- (receiver comtab char))
- ((pair? char)
- (if (null? (cdr char))
- (receiver comtab (car char))
- (loop (car comtab) char)))
- (else
- (error "Unrecognizable character" char))))
-
- (define comtab-entry
- (letrec
- ((ychar '())
- (receiver
- (lambda (alists char)
- (let ((entry (assq char (cdr alists))))
- (cond (entry (cdr entry))
- (default-key default-key)
- (else (editor-error (string-append "Unknown command: "
- (obj->string ychar)))))))))
- (lambda (xchar)
- (letrec
- ((lookup-vector
- (lambda (*char*)
- (let ((*int* (char->integer *char*)))
- (if (< *int* 256) ;;; change to 256 for internationalize
- (vector-ref (cdr comtab) *int*)
- default-key)))))
- (cond ((char? xchar) (lookup-vector xchar))
- ((and (pair? xchar) (null? (cdr xchar)))
- (lookup-vector (car xchar)))
- (else (set! ychar xchar)
- (comtab-lookup-prefix xchar receiver)))))))
-
-
- (define (set-comtab-entry! char command)
- (comtab-lookup-prefix char
- (lambda (alists char)
- (%set-comtab-entry! alists char command))))
-
- ;;; These are not used becuase the initkey stuff is used to define keys
-
- ;;;(define (define-key char command-name)
- ;;; (let ((command (name->command command-name)))
- ;;; (cond ((char? char)
- ;;; (%set-comtab-key comtab (char-upcase char) command)
- ;;; (if (char-alphabetic? char)
- ;;; (%set-comtab-key comtab (char-downcase char) command)))
- ;;; ((and (pair? char) (null? (cdr char)))
- ;;; (%set-comtab-key comtab (char-upcase (car char)) command)
- ;;; (if (char-alphabetic? char)
- ;;; (%set-comtab-key comtab (char-downcase (car char)) command)))
- ;;; ((pair? char)
- ;;; (comtab-lookup-prefix char
- ;;; (lambda (alists char)
- ;;; (let ((upcase (char-upcase char)))
- ;;; (%set-comtab-entry! alists upcase command)
- ;;; (if (char-alphabetic? char)
- ;;; (%set-comtab-entry! alists (char-downcase char)
- ;;; command))))))
- ;;; ((char-set? char)
- ;;; (mapc (lambda (char) (set-comtab-entry! char command))
- ;;; (char-set-members char)))
- ;;; (else (error "Unknown character" char))))
- ;;; char)
- ;;;
- ;;;(define (define-prefix-key char command-name)
- ;;; (let ((command (name->command command-name)))
- ;;; (cond ((or (char? char) (pair? char))
- ;;; (comtab-lookup-prefix char
- ;;; (lambda (alists char)
- ;;; (let ((upcase (char-upcase char)))
- ;;; (%set-comtab-key alists upcase command)
- ;;; (%comtab-make-prefix-char! alists upcase (cons '() '()))
- ;;; (if (char-alphabetic? char)
- ;;; (%comtab-make-synonym-char! alists (char-downcase char)
- ;;; alists upcase))))))
- ;;; (else (error "Unknown character" char))))
- ;;; char)
- ;;;
- ;;;(define (define-default-key command-name)
- ;;; (let ((command (name->command command-name)))
- ;;; (set! default-key command)
- ;;; (set-cdr! comtab (make-vector 128 command))))
-