From 9b93dd78c890801c0009bac168a7edcf9dba6f82 Mon Sep 17 00:00:00 2001
From: Chris Hanson <org/chris-hanson/cph>
Date: Mon, 1 Jun 1998 05:49:43 +0000
Subject: [PATCH] Use in-buffer prompt to handle errors in the REPL buffer. 
 The modeline prompt was very intrusive and couldn't be aborted out of. The
 new mechanism reads input exactly as the in-buffer debugger does, and can be
 aborted.

---
 v7/src/edwin/intmod.scm | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/v7/src/edwin/intmod.scm b/v7/src/edwin/intmod.scm
index 532552dc6..bc6fe3344 100644
--- a/v7/src/edwin/intmod.scm
+++ b/v7/src/edwin/intmod.scm
@@ -1,6 +1,6 @@
 ;;; -*-Scheme-*-
 ;;;
-;;;	$Id: intmod.scm,v 1.90 1998/03/08 08:25:25 cph Exp $
+;;;	$Id: intmod.scm,v 1.91 1998/06/01 05:49:43 cph Exp $
 ;;;
 ;;;	Copyright (c) 1986, 1989-98 Massachusetts Institute of Technology
 ;;;
@@ -343,9 +343,25 @@ REPL uses current evaluation environment."
 	     (if (and (ref-variable-object debug-on-evaluation-error)
 		      (let ((start? (ref-variable debugger-start-on-error?)))
 			(if (eq? 'ASK start?)
-			    (begin
-			      (beep)
-			      (prompt-for-confirmation "Start debugger"))
+			    (let loop ()
+			      (fresh-line port)
+			      (write-string ";Start debugger? (y or n): " port)
+			      (let ((char
+				     (read-command-char port
+							(cmdl/level repl))))
+				(write-char char port)
+				(cond ((or (char-ci=? char #\y)
+					   (char-ci=? char #\space))
+				       (fresh-line port)
+				       (write-string ";Starting debugger..."
+						     port)
+				       #t)
+				      ((or (char-ci=? char #\n)
+					   (char-ci=? char #\rubout))
+				       #f)
+				      (else
+				       (beep port)
+				       (loop)))))
 			    start?)))
 		 (start-debugger))))))))
 
-- 
2.25.1