Don't record command history in private mode.

Fixes #43.

qutebrowser/models/cmdhistory.py

@@ -21,6 +21,7 @@
 
 from PyQt5.QtCore import pyqtSlot
 
+from qutebrowser.config import config
 from qutebrowser.utils import usertypes, log
 
 
@@ -43,6 +44,7 @@ class History:
     """Command history.
 
     Attributes:
+        handle_private_mode: Whether to ignore history in private mode.
         history: A list of executed commands, with newer commands at the end.
         _tmphist: Temporary history for history browsing (as NeighborList)
     """
@@ -53,6 +55,7 @@ class History:
         Args:
             history: The initial history to set.
         """
+        self.handle_private_mode = False
         self._tmphist = None
         if history is None:
             self.history = []
@@ -120,5 +123,8 @@ class History:
         Args:
             text: The text to append.
         """
+        if (self.handle_private_mode and
+                config.get('general', 'private-browsing')):
+            return
         if not self.history or text != self.history[-1]:
             self.history.append(text)

qutebrowser/widgets/statusbar/command.py

@@ -64,6 +64,7 @@ class Command(misc.MinimalLineEditMixin, misc.CommandLineEdit):
         misc.CommandLineEdit.__init__(self, parent)
         misc.MinimalLineEditMixin.__init__(self)
         self._win_id = win_id
+        self.history.handle_private_mode = True
         self.history.history = objreg.get('command-history').data
         self.setSizePolicy(QSizePolicy.MinimumExpanding, QSizePolicy.Ignored)
         self.cursorPositionChanged.connect(self.update_completion)