[accerciser] * plugins/ipython_view.py: Made up/down history not loop (bug #578608).

[Eitan Isaacson <eitani src gnome org>]

commit 8aec477fc63737f6f85c0d19f21b0611440fbefc
Author: Eitan Isaacson <eitan ascender com>
Date:   Sun May 3 11:21:41 2009 +0300

    * plugins/ipython_view.py: Made up/down history not loop (bug #578608).
---
 ChangeLog               |    2 ++
 plugins/ipython_view.py |   14 ++++++++++++--
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index bae8b97..6ce7613 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,7 @@
 2009-05-02  Eitan Isaacson  <eitan ascender com>
 
+	* plugins/ipython_view.py: Made up/down history not loop (bug #578608).
+
 	* README: 
 	* accerciser.spec.in: 
 	* debian/control: 
diff --git a/plugins/ipython_view.py b/plugins/ipython_view.py
index a9c36bc..384c859 100755
--- a/plugins/ipython_view.py
+++ b/plugins/ipython_view.py
@@ -134,6 +134,8 @@ class IterableIPShell:
     @rtype: string
     '''
     self.history_level -= 1
+    if not self._getHistory():
+      self.history_level +=1
     return self._getHistory()
   
   def historyForward(self):
@@ -143,7 +145,8 @@ class IterableIPShell:
     @return: The command string.
     @rtype: string
     '''
-    self.history_level += 1
+    if self.history_level < 0:
+      self.history_level += 1
     return self._getHistory()
   
   def _getHistory(self):
@@ -156,7 +159,6 @@ class IterableIPShell:
     try:
       rv = self.IP.user_ns['In'][self.history_level].strip('\n')
     except IndexError:
-      self.history_level = 0
       rv = ''
     return rv
 
@@ -511,3 +513,11 @@ class IPythonView(ConsoleView, IterableIPShell):
     self.showReturned(rv)
     self.cout.truncate(0)
     
+if __name__ == "__main__":
+  window = gtk.Window()
+  window.set_default_size(640, 320)
+  window.connect('delete-event', lambda x, y: gtk.main_quit())
+  window.add(IPythonView())
+  window.show_all()
+  gtk.main()
+