Handle cancelling of authentication

qutebrowser/config/configdata.py

@@ -698,8 +698,8 @@ DATA = OrderedDict([
 
     ('keybind.prompt', sect.ValueList(
         types.KeyBindingName(), types.KeyBinding(),
-        #('<Escape>', 'leave-mode'),
-        #('<Ctrl-N>', 'leave-mode'),
+        ('<Escape>', 'leave-mode'),
+        ('<Ctrl-N>', 'leave-mode'),
         ('<Return>', 'prompt-accept'),
     )),
 

qutebrowser/widgets/statusbar/_prompt.py

@@ -54,6 +54,7 @@ class Prompt(TextBase):
 
     show_prompt = pyqtSignal()
     hide_prompt = pyqtSignal()
+    cancelled = pyqtSignal()
 
     def __init__(self, parent=None):
         super().__init__(parent)
@@ -77,6 +78,8 @@ class Prompt(TextBase):
             self._input.clear()
             self._input.setEchoMode(QLineEdit.Normal)
             self.hide_prompt.emit()
+            if self.question.answer is None:
+                self.cancelled.emit()
 
     @cmdutils.register(instance='mainwindow.status.prompt', hide=True,
                        modes=['prompt'])
@@ -129,6 +132,7 @@ class Prompt(TextBase):
     def exec_(self):
         self.display()
         self.question.answered.connect(self.loop.quit)
+        self.cancelled.connect(self.loop.quit)
         self.loop.exec_()
         return self.question.answer
 

qutebrowser/widgets/statusbar/bar.py

@@ -323,9 +323,11 @@ class StatusBar(QWidget):
         q.mode = PromptMode.user_pwd
         q.text = "Username ({}):".format(authenticator.realm())
         self.prompt.question = q
-        user, password = self.prompt.exec_()
-        authenticator.setUser(user)
-        authenticator.setPassword(password)
+        answer = self.prompt.exec_()
+        if answer is not None:
+            user, password = answer
+            authenticator.setUser(user)
+            authenticator.setPassword(password)
 
     def resizeEvent(self, e):
         """Extend resizeEvent of QWidget to emit a resized signal afterwards.