restore terminal title on exit (xterm)

IPython/terminal/interactiveshell.py

@@ -8,7 +8,7 b' from warnings import warn'
 from IPython.core.interactiveshell import InteractiveShell, InteractiveShellABC
 from IPython.utils import io
 from IPython.utils.py3compat import input
-from IPython.utils.terminal import toggle_set_term_title, set_term_title
+from IPython.utils.terminal import toggle_set_term_title, set_term_title, restore_term_title
 from IPython.utils.process import abbrev_cwd
 from traitlets import (
     Bool, Unicode, Dict, Integer, observe, Instance, Type, default, Enum, Union,
@@ -238,6 +238,10 b' class TerminalInteractiveShell(InteractiveShell):'
         else:
             toggle_set_term_title(False)
 
+    def restore_term_title(self):
+        if self.term_title:
+            restore_term_title()
+
     def init_display_formatter(self):
         super(TerminalInteractiveShell, self).init_display_formatter()
         # terminal only supports plain text
@@ -507,6 +511,9 b' class TerminalInteractiveShell(InteractiveShell):'
                 if hasattr(self, '_eventloop'):
                     self._eventloop.stop()
 
+                self.restore_term_title()
+
+
     _inputhook = None
     def inputhook(self, context):
         if self._inputhook is not None:

IPython/utils/terminal.py

@@ -58,14 +58,26 b' def _set_term_title(*args,**kw):'
     pass
 
 
+def _restore_term_title():
+    pass
+
+
 def _set_term_title_xterm(title):
     """ Change virtual terminal title in xterm-workalikes """
+    # save the current title to the xterm "stack"
+    sys.stdout.write('\033[22;0t') 
     sys.stdout.write('\033]0;%s\007' % title)
 
+
+def _restore_term_title_xterm():
+    sys.stdout.write('\033[23;0t') 
+
+
 if os.name == 'posix':
     TERM = os.environ.get('TERM','')
     if TERM.startswith('xterm'):
         _set_term_title = _set_term_title_xterm
+        _restore_term_title = _restore_term_title_xterm
 elif sys.platform == 'win32':
     try:
         import ctypes
@@ -100,6 +112,13 b' def set_term_title(title):'
     _set_term_title(title)
 
 
+def restore_term_title():
+    """Restore, if possible, terminal title to the original state"""
+    if ignore_termtitle:
+        return
+    _restore_term_title()
+
+
 def freeze_term_title():
     warnings.warn("This function is deprecated, use toggle_set_term_title()")
     global ignore_termtitle