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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
- ;;;
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
- (define reset-typein-window
- (lambda ()
- (%clear-window typein-screen)))
-
- ;;; command-prompts
-
- (define *command-prompt-string* #F)
-
- (define *command-prompt-displayed?* #F)
-
- (define *temporary-message-displayed?* #F)
-
- (define *prompt-should-be-erased?* #F)
-
- (define *t-msg* "")
-
- (define reset-command-prompt!
- (lambda ()
- (set! *command-prompt-string* #F)
- (set! *command-prompt-displayed?* #F)))
-
- (define set-command-prompt!
- (lambda (prompt)
- (set! *command-prompt-string* prompt)))
-
- (define set-echo-prompt!
- (lambda (string)
- (set! *command-prompt-string* #F)
- (set! *command-prompt-displayed?* #F)
- (set! *temporary-message-displayed?* #F)
- (set! *prompt-should-be-erased?* #F)
- (write-prompt! string)))
-
- (define erase-echo-prompt!
- (lambda ()
- (set! *command-prompt-string* #F)
- (set! *command-prompt-displayed?* #F)
- (set! *temporary-message-displayed?* #F)
- (set! *prompt-should-be-erased?* #F)
- (clear-prompt!)))
-
- (define update-typein-window!
- (lambda ()
- (cond (*command-prompt-string*
- (write-prompt! *command-prompt-string*)
- (set! *command-prompt-string* #F)
- (set! *command-prompt-displayed?* #T)
- (set! *temporary-message-displayed?* #F)
- (set! *prompt-should-be-erased?* #T))
-
- (*prompt-should-be-erased?*
- (set! *command-prompt-displayed?* #F)
- (set! *temporary-message-displayed?* #F)
- (set! *prompt-should-be-erased?* #F)
- (clear-prompt!))
-
- (*temporary-message-displayed?*
- (set! *prompt-should-be-erased?* #T)
- (set! *command-prompt-displayed?* #F)
- (set! *temporary-message-displayed?* #F)))))
-
- (define write-prompt!
- (lambda (string)
- (%clear-window typein-screen)
- (write-string! typein-screen string 0 0)))
-
- (define clear-prompt!
- (lambda ()
- (%clear-window typein-screen)))
-
- (define temporary-message
- (lambda (string)
- (set! *t-msg* string)
- (set-temp-message-status)
- (write-prompt! string)))
-
- (define set-temp-message-status
- (lambda ()
- (set! *command-prompt-string* #F)
- (set! *command-prompt-displayed?* #F)
- (set! *prompt-should-be-erased?* #F)
- (set! *temporary-message-displayed?* #T)))
-
- (define append-message
- (lambda (string)
- (set! *t-msg* (string-append *t-msg* string))
- (temporary-message *t-msg*)))
-
- ;;; prompting
-
- (define prompt-for-pathname
- (lambda (prompt)
- (temporary-message prompt)
- (read-pathname-from-screen typein-screen)))
-
- (define prompt-for-confirmation?
- (lambda (prompt)
- (define (loop)
- (let ((char (char-upcase (editor-read-char typein-screen))))
- (if (or (char=? #\Y char) (char=? #\N char))
- (char=? #\Y char)
- (loop))))
- (temporary-message prompt)
- (loop)))
-
-
- (define read-pathname-from-screen
- (let ((input-buffer (make-string (ncols) #\space)))
- (lambda (screen)
- (define erase-move-back
- (lambda (screen)
- (let ((cursor-x (%reify-port screen screen:cursor-x))
- (cursor-y (%reify-port screen screen:cursor-y))
- (set-cursor-pos
- (lambda (x y)
- (%reify-port! screen screen:cursor-x x)
- (%reify-port! screen screen:cursor-y y))))
- (set-cursor-pos (-1+ cursor-x) cursor-y)
- (princ #\space screen)
- (set-cursor-pos (-1+ cursor-x) cursor-y))))
-
- (define (loop char ptr)
- (cond ((char=? char #\return) (substring input-buffer 0 ptr))
- ((char=? char #\Backspace)
- (if (not (= ptr 0))
- (begin
- (erase-move-back screen)
- (loop (editor-read-char screen) (-1+ ptr)))
- (loop (editor-read-char screen) ptr)))
- ((char-graphic? char)
- (princ char screen)
- (string-set! input-buffer ptr char)
- (loop (editor-read-char screen) (1+ ptr)))
- (else (loop (editor-read-char screen) ptr))))
- (loop (editor-read-char screen) 0))))
-
-