Handle completions for ValueList sections correctly

TODO

@@ -37,7 +37,6 @@ handle completion for aliases
 keybind should have completion for commands/arguments
 Hiding scrollbars
 Ctrl+A/X to increase/decrease last number in URL
-command completion gets hidden when doing a new ValueList value
 logging contexts
 catch import errors for PyQt and QtWebKit
 - Add more element-selection-detection code (with options?) based on:

qutebrowser/models/completion.py

@@ -61,10 +61,20 @@ class SettingValueCompletionModel(BaseCompletionModel):
 
     # pylint: disable=abstract-method
 
-    def __init__(self, section, option, parent=None):
+    def __init__(self, section, option=None, parent=None):
         super().__init__(parent)
-        cat = self.new_category("Setting values for {}".format(option))
-        vals = configdata.DATA[section][option].typ.complete()
+        if hasattr(configdata.DATA[section], 'valtype'):
+            # Same type for all values (ValueList)
+            cat = self.new_category("Setting values for {} options".format(
+                section))
+            vals = configdata.DATA[section].valtype.complete()
+        else:
+            if option is None:
+                raise ValueError("option may only be None for ValueList "
+                                 "sections, but {} is not!".format(section))
+            # Different type for each value (KeyValue)
+            cat = self.new_category("Setting values for {}".format(option))
+            vals = configdata.DATA[section][option].typ.complete()
         if vals is None:
             raise NoCompletionsError
         for (val, desc) in vals:

qutebrowser/utils/usertypes.py

@@ -140,3 +140,18 @@ class NeighborList:
         else:
             self.idx = self._items.index(self._default)
             return self.curitem()
+
+
+class FakeDict:
+
+    """A fake dictionary which always returns the same value.
+
+    Attributes:
+        _val: The value to return.
+    """
+
+    def __init__(self, val):
+        self._val = val
+
+    def __getitem__(self, _key):
+        return self._val

qutebrowser/widgets/_completion.py

@@ -41,6 +41,7 @@ from qutebrowser.models.completionfilter import CompletionFilterModel
 from qutebrowser.models.completion import (
     CommandCompletionModel, SettingSectionCompletionModel,
     SettingOptionCompletionModel, SettingValueCompletionModel)
+from qutebrowser.utils.usertypes import FakeDict
 
 
 class CompletionView(QTreeView):
@@ -114,17 +115,7 @@ class CompletionView(QTreeView):
             'option': {},
             'value': {},
         }
-        for sect in configdata.DATA.keys():
-            self._models['option'][sect] = CompletionFilterModel(
-                SettingOptionCompletionModel(sect, self))
-            self._models['value'][sect] = {}
-            for opt in configdata.DATA[sect].keys():
-                try:
-                    self._models['value'][sect][opt] = (
-                        CompletionFilterModel(SettingValueCompletionModel(
-                            sect, opt, self)))
-                except NoCompletionsError:
-                    pass
+        self._init_completions()
         self._completing = False
 
         self._delegate = _CompletionItemDelegate(self)
@@ -144,6 +135,29 @@ class CompletionView(QTreeView):
         self.hide()
         # FIXME set elidemode
 
+    def _init_completions(self):
+        """Initialize completion models."""
+        for sectname, sect in configdata.DATA.items():
+            self._models['option'][sectname] = CompletionFilterModel(
+                SettingOptionCompletionModel(sectname, self))
+            if hasattr(sect, 'valtype'):
+                # Same type for all values (ValueList)
+                try:
+                    model = CompletionFilterModel(
+                        SettingValueCompletionModel(sectname, parent=self))
+                    self._models['value'][sectname] = FakeDict(model)
+                except NoCompletionsError:
+                    pass
+            else:
+                self._models['value'][sectname] = {}
+                for opt in configdata.DATA[sectname].keys():
+                    try:
+                        self._models['value'][sectname][opt] = (
+                            CompletionFilterModel(SettingValueCompletionModel(
+                                sectname, opt, self)))
+                    except NoCompletionsError:
+                        pass
+
     def _next_idx(self, upwards):
         """Get the previous/next QModelIndex displayed in the view.