From 0676dfdce06f6b01f35d76a4fb77c77c03468366 Mon Sep 17 00:00:00 2001
From: "Kurt B. Kaiser" <kbk@shore.net>
Date: Thu, 3 Feb 2005 01:37:14 +0000
Subject: Add config-main.def option to make the 'history' feature non-cyclic.
 Default remains cyclic.  Python Patch 914546 Noam Raphael.

M IdleHistory.py
M NEWS.txt
M config-main.def
---
 Lib/idlelib/IdleHistory.py  | 20 +++++++++++++++-----
 Lib/idlelib/NEWS.txt        |  3 +++
 Lib/idlelib/config-main.def |  7 +++++--
 3 files changed, 23 insertions(+), 7 deletions(-)

diff --git a/Lib/idlelib/IdleHistory.py b/Lib/idlelib/IdleHistory.py
index 46e70e1..f672db7 100644
--- a/Lib/idlelib/IdleHistory.py
+++ b/Lib/idlelib/IdleHistory.py
@@ -1,3 +1,5 @@
+from configHandler import idleConf
+
 class History:
 
     def __init__(self, text, output_sep = "\n"):
@@ -6,6 +8,7 @@ class History:
         self.history_prefix = None
         self.history_pointer = None
         self.output_sep = output_sep
+        self.cyclic = idleConf.GetOption("main", "History", "cyclic", 1, "bool")
         text.bind("<<history-previous>>", self.history_prev)
         text.bind("<<history-next>>", self.history_next)
 
@@ -40,7 +43,11 @@ class History:
             if reverse:
                 pointer = nhist
             else:
-                pointer = -1
+                if self.cyclic:
+                    pointer = -1
+                else:
+                    self.text.bell()
+                    return
         nprefix = len(prefix)
         while 1:
             if reverse:
@@ -49,10 +56,13 @@ class History:
                 pointer = pointer + 1
             if pointer < 0 or pointer >= nhist:
                 self.text.bell()
-                if self._get_source("iomark", "end-1c") != prefix:
-                    self.text.delete("iomark", "end-1c")
-                    self._put_source("iomark", prefix)
-                pointer = prefix = None
+                if not self.cyclic and pointer < 0:
+                    return
+                else:
+                    if self._get_source("iomark", "end-1c") != prefix:
+                        self.text.delete("iomark", "end-1c")
+                        self._put_source("iomark", prefix)
+                    pointer = prefix = None
                 break
             item = self.history[pointer]
             if item[:nprefix] == prefix and len(item) > nprefix:
diff --git a/Lib/idlelib/NEWS.txt b/Lib/idlelib/NEWS.txt
index 8804bc1..0670255 100644
--- a/Lib/idlelib/NEWS.txt
+++ b/Lib/idlelib/NEWS.txt
@@ -3,6 +3,9 @@ What's New in IDLE 1.2a0?
 
 *Release date: XX-XXX-2005*
 
+- Add config-main option to make the 'history' feature non-cyclic.
+  Default remains cyclic.  Python Patch 914546 Noam Raphael.
+
 - Removed ability to configure tabs indent from Options dialog.  This 'feature'
   has never worked and no one has complained.  It is still possible to set a
   default tabs (v. spaces) indent 'manually' via config-main.def (or to turn on
diff --git a/Lib/idlelib/config-main.def b/Lib/idlelib/config-main.def
index b8667b8..5ddd098 100644
--- a/Lib/idlelib/config-main.def
+++ b/Lib/idlelib/config-main.def
@@ -18,8 +18,8 @@
 #     ~/.idlerc/config-highlight.cfg       the user highlighting config file
 #     ~/.idlerc/config-keys.cfg            the user keybinding config file
 #
-# On Windows2000 and Windows XP the .idlerc directory is at 
-#	Documents and Settings\<username>\.idlerc	
+# On Windows2000 and Windows XP the .idlerc directory is at
+#     Documents and Settings\<username>\.idlerc
 #
 # On Windows98 it is at c:\.idlerc
 #
@@ -73,4 +73,7 @@ name= IDLE Classic
 default= 1
 name= IDLE Classic Windows
 
+[History]
+cyclic=1
+
 [HelpFiles]
-- 
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