From 3f8eefba65c6f4b9c20d5f802451944bbe7e98ee Mon Sep 17 00:00:00 2001
From: Fred Fish <fnf@specifix.com>
Date: Thu, 20 Jun 1996 15:50:37 +0000
Subject: [PATCH] 	* gdbtk.tcl (gdbtk_tcl_readline_begin): Handle
 backspace to 	avoid backing up over prompt.  At every input, make sure
 insert 	point is at least after command start, handle control-u to
 delete 	current input line. 	(tclsh): Handle backspace to avoid
 backing up over prompt.  Handle 	control-u to delete current input
 line.

---
 gdb/ChangeLog |  9 +++++++++
 gdb/gdbtk.tcl | 29 +++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 07de414ee29..fef832edda2 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,4 +1,13 @@
 start-sanitize-gdbtk
+Thu Jun 20 08:18:59 1996  Fred Fish  <fnf@cygnus.com>
+
+	* gdbtk.tcl (gdbtk_tcl_readline_begin): Handle backspace to
+	avoid backing up over prompt.  At every input, make sure insert
+	point is at least after command start, handle control-u to delete
+	current input line.
+	(tclsh): Handle backspace to avoid backing up over prompt.  Handle
+	control-u to delete current input line.
+
 Wed Jun 19 17:23:38 1996  Geoffrey Noer  <noer@cygnus.com>
 
 	* configure.in: disable gdbtk for *cygwin32* hosted compiles
diff --git a/gdb/gdbtk.tcl b/gdb/gdbtk.tcl
index 2bb5b27ffc9..2770166c48b 100644
--- a/gdb/gdbtk.tcl
+++ b/gdb/gdbtk.tcl
@@ -302,6 +302,23 @@ proc gdbtk_tcl_readline_begin {message} {
 	set readline_text [.rl.text get cmdstart {end - 1 char}]
 	.rl.text mark set cmdstart insert
     }
+    bind .rl.text <BackSpace> {
+	if [%W compare insert > cmdstart] {
+	    %W delete {insert - 1 char} insert
+	} else {
+	    bell
+	}
+	break
+    }
+    bind .rl.text <Any-Key> {
+	if [%W compare insert < cmdstart] {
+	    %W mark set insert end
+	}
+    }
+    bind .rl.text <Control-u> {
+	%W delete cmdstart "insert lineend"
+	%W see insert
+    }
     bindtags .rl.text {.rl.text Text all}
 }
 
@@ -3242,11 +3259,23 @@ proc tclsh {} {
 
     # Keybindings that limit input and evaluate things
     bind .eval.text <Return> { evaluate_tcl_command .eval.text ; break }
+    bind .eval.text <BackSpace> {
+	if [%W compare insert > cmdstart] {
+	    %W delete {insert - 1 char} insert
+	} else {
+	    bell
+	}
+	break
+    }
     bind .eval.text <Any-Key> {
 	if [%W compare insert < cmdstart] {
 	    %W mark set insert end
 	}
     }
+    bind .eval.text <Control-u> {
+	%W delete cmdstart "insert lineend"
+	%W see insert
+    }
     bindtags .eval.text {.eval.text Text all}
 }
 
-- 
2.30.2