ExcludeTypes: Add combo box for filtering lists by attribute membership.

This by itself does not include/exclude types.

Closes #125

data/exclude_types.ui

@@ -6,12 +6,12 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>485</width>
+    <width>619</width>
     <height>340</height>
    </rect>
   </property>
   <property name="windowTitle">
-   <string>Dialog</string>
+   <string>Exclude Types From Analysis</string>
   </property>
   <layout class="QGridLayout" name="gridLayout">
    <item row="0" column="0">
@@ -118,7 +118,7 @@
      </property>
     </spacer>
    </item>
-   <item row="5" column="2">
+   <item row="6" column="2">
     <widget class="QDialogButtonBox" name="buttonBox">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
@@ -128,6 +128,26 @@
      </property>
     </widget>
    </item>
+   <item row="5" column="1">
+    <widget class="QComboBox" name="attr">
+     <property name="maximumSize">
+      <size>
+       <width>150</width>
+       <height>16777215</height>
+      </size>
+     </property>
+    </widget>
+   </item>
+   <item row="5" column="0">
+    <widget class="QLabel" name="label_3">
+     <property name="text">
+      <string>Filter types by attribute:</string>
+     </property>
+     <property name="alignment">
+      <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
+     </property>
+    </widget>
+   </item>
    <item row="1" column="0" rowspan="4">
     <widget class="QListView" name="included_types">
      <property name="selectionMode">

setoolsgui/apol/excludetypes.py

@@ -41,25 +41,33 @@ class ExcludeTypes(SEToolsWidget, QDialog):
 
     def setupUi(self):
         self.load_ui("exclude_types.ui")
-        self.exclude_a_type.clicked.connect(self.exclude_clicked)
-        self.include_a_type.clicked.connect(self.include_clicked)
+
+        # populate the attribute combo box:
+        self.attr_model = SEToolsListModel(self)
+        self.attr_model.item_list = [""] + sorted(self.policy.typeattributes())
+        self.attr.setModel(self.attr_model)
 
         # populate the models:
         self.included_model = SEToolsListModel(self)
         self.included_model.item_list = [t for t in self.policy.types()
                                          if t not in self.initial_excluded_list]
-        self.included_sort = QSortFilterProxyModel(self)
+        self.included_sort = FilterByAttributeProxy(self)
         self.included_sort.setSourceModel(self.included_model)
         self.included_sort.sort(0, Qt.AscendingOrder)
         self.included_types.setModel(self.included_sort)
 
         self.excluded_model = SEToolsListModel(self)
         self.excluded_model.item_list = self.initial_excluded_list
-        self.excluded_sort = QSortFilterProxyModel(self)
+        self.excluded_sort = FilterByAttributeProxy(self)
         self.excluded_sort.setSourceModel(self.excluded_model)
         self.excluded_sort.sort(0, Qt.AscendingOrder)
         self.excluded_types.setModel(self.excluded_sort)
 
+        # connect signals
+        self.exclude_a_type.clicked.connect(self.exclude_clicked)
+        self.include_a_type.clicked.connect(self.include_clicked)
+        self.attr.currentIndexChanged.connect(self.set_attr_filter)
+
     def include_clicked(self):
         selected_types = []
         for index in self.excluded_types.selectionModel().selectedIndexes():
@@ -86,8 +94,41 @@ class ExcludeTypes(SEToolsWidget, QDialog):
         for item in selected_types:
             self.included_model.remove(item)
 
+    def set_attr_filter(self, row):
+        index = self.attr_model.index(row)
+        attr = self.attr_model.data(index, Qt.UserRole)
+        self.log.debug("Attribute set to {0!r}".format(attr))
+        self.included_sort.attr = attr
+        self.excluded_sort.attr = attr
+
     def accept(self):
         self.log.debug("Chosen for exclusion: {0!r}".format(self.excluded_model.item_list))
 
         self.parent.query.exclude = self.excluded_model.item_list
         super(ExcludeTypes, self).accept()
+
+
+class FilterByAttributeProxy(QSortFilterProxyModel):
+
+    """Filter a list of types by attribute membership."""
+
+    _attr = None
+
+    @property
+    def attr(self):
+        return self._attr
+
+    @attr.setter
+    def attr(self, value):
+        self._attr = value
+        self.invalidateFilter()
+
+    def filterAcceptsRow(self, row, parent):
+        if self.attr:
+            source = self.sourceModel()
+            index = source.index(row)
+            item = source.data(index, Qt.UserRole)
+            if item not in self.attr:
+                return False
+
+        return True