Make it possible to cancel a message.question

qutebrowser/utils/message.py

@@ -88,13 +88,15 @@ def alert(message):
     instance().question.emit(q, True)
 
 
-def question(message, mode, handler, default=None):
+def question(message, mode, handler, cancelled_handler=None, default=None):
     """Ask an async question in the statusbar.
 
     Args:
         message: The message to display to the user.
         mode: A PromptMode.
         handler: The function to get called with the answer as argument.
+        cancelled_handler: The function to get called when the prompt was
+                           cancelled by the user, or None.
         default: The default value to display.
     """
     q = Question()
@@ -102,6 +104,8 @@ def question(message, mode, handler, default=None):
     q.mode = mode
     q.default = default
     q.answered.connect(lambda: handler(q.answer))
+    if cancelled_handler is not None:
+        q.cancelled.connect(cancelled_handler)
     instance().question.emit(q, True)
 
 

qutebrowser/utils/usertypes.py

@@ -255,6 +255,7 @@ class Question(QObject):
         answered: Emitted when the question has been answered by the user.
                   This is emitted from qutebrowser.widgets.statusbar._prompt so
                   it can be emitted after the mode is left.
+        cancelled: Emitted when the question has been cancelled by the user.
         answered_yes: Convienience signal emitted when a yesno question was
                       answered with yes.
         answered_no: Convienience signal emitted when a yesno question was
@@ -262,6 +263,7 @@ class Question(QObject):
     """
 
     answered = pyqtSignal()
+    cancelled = pyqtSignal()
     answered_yes = pyqtSignal()
     answered_no = pyqtSignal()
 

qutebrowser/widgets/statusbar/prompt.py

@@ -41,12 +41,10 @@ class Prompt(QWidget):
     Signals:
         show_prompt: Emitted when the prompt widget wants to be shown.
         hide_prompt: Emitted when the prompt widget wants to be hidden.
-        cancelled: Emitted when the prompt was cancelled by the user.
     """
 
     show_prompt = pyqtSignal()
     hide_prompt = pyqtSignal()
-    cancelled = pyqtSignal()
 
     def __init__(self, parent=None):
         super().__init__(parent)
@@ -65,19 +63,14 @@ class Prompt(QWidget):
         self._hbox.addWidget(self._input)
 
     def on_mode_left(self, mode):
-        """Clear and reset input when the mode was left.
+        """Clear and reset input when the mode was left."""
-
-        Emit:
-            cancelled: Emitted when the mode was forcibly left by the user
-                       without answering the question.
-        """
         if mode in ('prompt', 'yesno'):
             self._txt.setText('')
             self._input.clear()
             self._input.setEchoMode(QLineEdit.Normal)
             self.hide_prompt.emit()
             if self.question.answer is None:
-                self.cancelled.emit()
+                self.question.cancelled.emit()
 
     @cmdutils.register(instance='mainwindow.status.prompt', hide=True,
                        modes=['prompt'])
@@ -206,6 +199,6 @@ class Prompt(QWidget):
             The answer to the question. No, it's not always 42.
         """
         self.question.answered.connect(self.loop.quit)
-        self.cancelled.connect(self.loop.quit)
+        self.question.cancelled.connect(self.loop.quit)
         self.loop.exec_()
         return self.question.answer