From 02a64630aa83e37e47a28a60366e1c65f0eba3ac Mon Sep 17 00:00:00 2001
From: Nicholas Schwab <git@nicholas-schwab.de>
Date: Thu, 8 Apr 2021 16:20:14 +0200
Subject: [PATCH] Added configtype to wrap valid prefixes.

---
 qutebrowser/config/configtypes.py | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/qutebrowser/config/configtypes.py b/qutebrowser/config/configtypes.py
index 4439cd4f4..55676207f 100644
--- a/qutebrowser/config/configtypes.py
+++ b/qutebrowser/config/configtypes.py
@@ -142,6 +142,27 @@ class ValidValues:
                 self.descriptions == other.descriptions)
 
 
+class ValidPrefixes(ValidValues):
+
+    def __init__(self, *values, separator: str = ':', **kwargs):
+        super().__init__(*values, **kwargs)
+        self.separator = separator
+
+    def __contains__(self, item) -> bool:
+        return any(map(lambda x: item.startswith(x + self.separator), self.values))
+
+    def __iter__(self) -> Iterator[str]:
+        return map(lambda x: x + self.separator, super().__iter__())
+
+    def __repr__(self) -> str:
+        return utils.get_repr(self, values=self.values, separator=self.separator,
+                              descriptions=self.descriptions)
+
+    def __eq__(self, other: object) -> bool:
+        assert (isinstance(other, ValidPrefixes))
+        return super().__eq__(other) and self.separator == other.separator
+
+
 class BaseType:
 
     """A type used for a setting value.