Add a complete() method to config types

qutebrowser/config/config.py

@@ -174,7 +174,7 @@ class Config(QObject):
             for descline in desc.splitlines():
                 lines += wrapper.wrap(descline)
             valid_values = option.typ.valid_values
-            if valid_values is not None and valid_values.show:
+            if valid_values is not None:
                 if valid_values.descriptions:
                     for val in valid_values:
                         desc = valid_values.descriptions[val]

qutebrowser/config/conftypes.py

@@ -44,13 +44,11 @@ class ValidValues:
     Attributes:
         values: A list with the allowed untransformed values.
         descriptions: A dict with value/desc mappings.
-        show: Whether to show the values in the config or not.
     """
 
-    def __init__(self, *vals, show=True):
+    def __init__(self, *vals):
         self.descriptions = {}
         self.values = []
-        self.show = show
         for v in vals:
             if isinstance(v, str):
                 # Value without description
@@ -119,6 +117,27 @@ class BaseType:
             raise NotImplementedError("{} does not implement validate.".format(
                 self.__class__.__name__))
 
+    def complete(self):
+        """Return a list of possible values for completion.
+
+        The default implementation just returns valid_values, but it might be
+        useful to override this for special cases.
+
+        Return:
+            A list of (value, description) tuples or None.
+        """
+        if self.valid_values is None:
+            return None
+        else:
+            out = []
+            for val in self.valid_values:
+                try:
+                    desc = self.valid_values.descriptions[val]
+                except KeyError:
+                    desc = ""
+            out.append((val, desc))
+            return out
+
 
 class String(BaseType):
 
@@ -155,7 +174,6 @@ class Bool(BaseType):
         _BOOLEAN_STATES: A dictionary of strings mapped to their bool meanings.
     """
 
-    valid_values = ValidValues('true', 'false', show=False)
     typestr = 'bool'
 
     # Taken from configparser
@@ -169,6 +187,9 @@ class Bool(BaseType):
         if value.lower() not in Bool._BOOLEAN_STATES:
             raise ValidationError(value, "must be a boolean!")
 
+    def complete(self):
+        return [('true', ''), ('false', '')]
+
 
 class Int(BaseType):
 

qutebrowser/models/settingcompletion.py

@@ -62,12 +62,8 @@ class SettingValueCompletionModel(CompletionModel):
     def __init__(self, section, option, parent=None):
         super().__init__(parent)
         cat = self.new_category("Setting values for {}".format(option))
-        vals = configdata.DATA[section][option].typ.valid_values
+        vals = configdata.DATA[section][option].typ.complete()
         if vals is None:
             raise NoCompletionsError
-        for val in vals:
-            try:
-                desc = vals.descriptions[val]
-            except KeyError:
-                desc = ""
+        for (val, desc) in vals:
             self.new_item(cat, val, desc)