Add run_in_terminal option to disable cooked mode

Adds a `cooked_mode` optional argument to run_in_terminal. Using it
avoids CPR responses being echoed to the terminal (see #482). It is not
a complete solution because they can still appear once the prompt exits
and thus leaves raw mode, but avoids some instances.

The default is left at the old behaviour for backwards compatibility.

1 files changed, 7 insertions, 2 deletions

diff --git a/prompt_toolkit/interface.py b/prompt_toolkit/interface.py
index 898ac0ed..e1e0e563 100644
--- a/prompt_toolkit/interface.py
+++ b/prompt_toolkit/interface.py
@@ -611,7 +611,7 @@ class CommandLineInterface(object):
         if self.eventloop:
             self.eventloop.stop()
 
-    def run_in_terminal(self, func, render_cli_done=False):
+    def run_in_terminal(self, func, render_cli_done=False, cooked_mode=True):
         """
         Run function on the terminal above the prompt.
 
@@ -624,6 +624,8 @@ class CommandLineInterface(object):
         :param render_cli_done: When True, render the interface in the
                 'Done' state first, then execute the function. If False,
                 erase the interface first.
+        :param cooked_mode: When True (the default), switch the input to
+                cooked mode while executing the function.
 
         :returns: the result of `func`.
         """
@@ -637,7 +639,10 @@ class CommandLineInterface(object):
         self._return_value = None
 
         # Run system command.
-        with self.input.cooked_mode():
+        if cooked_mode:
+            with self.input.cooked_mode():
+                result = func()
+        else:
             result = func()
 
         # Redraw interface again.