Handle Shift-Insert correctly in prompt mode.

Fixes #1299.

CHANGELOG.asciidoc

@@ -36,6 +36,7 @@ Changed
 - `:navigate increment/decrement` now preserves leading zeroes in URLs.
 - `general -> editor` can now also handle `{}` inside another argument (e.g. to open `vim` via `termite`)
 - Improved performance when scrolling with many tabs open.
+- Shift-Insert now also pastes primary selection for prompts.
 
 Fixed
 ~~~~~

qutebrowser/misc/miscwidgets.py

@@ -42,6 +42,19 @@ class MinimalLineEditMixin:
         """)
         self.setAttribute(Qt.WA_MacShowFocusRect, False)
 
+    def keyPressEvent(self, e):
+        """Override keyPressEvent to paste primary selection on Shift + Ins."""
+        if e.key() == Qt.Key_Insert and e.modifiers() == Qt.ShiftModifier:
+            try:
+                text = utils.get_clipboard(selection=True)
+            except utils.SelectionUnsupportedError:
+                pass
+            else:
+                e.accept()
+                self.insert(text)
+                return
+        super().keyPressEvent(e)
+
     def __repr__(self):
         return utils.get_repr(self)
 
@@ -98,19 +111,6 @@ class CommandLineEdit(QLineEdit):
         if mark:
             self.setSelection(self._promptlen, oldpos - self._promptlen)
 
-    def keyPressEvent(self, e):
-        """Override keyPressEvent to paste primary selection on Shift + Ins."""
-        if e.key() == Qt.Key_Insert and e.modifiers() == Qt.ShiftModifier:
-            try:
-                text = utils.get_clipboard(selection=True)
-            except utils.SelectionUnsupportedError:
-                pass
-            else:
-                e.accept()
-                self.insert(text)
-                return
-        super().keyPressEvent(e)
-
 
 class _CommandValidator(QValidator):
 

tests/integration/features/prompts.feature

@@ -58,6 +58,20 @@ Feature: Prompts
         And I run :leave-mode
         Then the javascript message "Prompt reply: null" should be logged
 
+
+    # Shift-Insert with prompt (issue 1299)
+
+    @pyqt531_or_newer
+    Scenario: Pasting via shift-insert in prompt mode
+        When selection is supported
+        And I put "insert test" into the primary selection
+        And I open data/prompt/jsprompt.html
+        And I click the button
+        And I wait for a prompt
+        And I press the keys "<Shift-Insert>"
+        And I run :prompt-accept
+        Then the javascript message "Prompt reply: insert test" should be logged
+
     @pyqt531_or_newer
     Scenario: Using content -> ignore-javascript-prompt
         When I set content -> ignore-javascript-prompt to true