Merge remote-tracking branch 'atodorov/inheritance_top_class'

doc/ext/inheritance.rst

@@ -42,6 +42,58 @@ It adds this directive:
    .. versionchanged:: 1.5
       Added ``caption`` option
 
+   It also supports a ``top-classes`` option which requires one or more class
+   names separated by comma. If specified inheritance traversal will stop at the
+   specified class names. Given the following Python module::
+
+        """
+               A
+              / \
+             B   C
+            / \ / \
+           E   D   F
+        """
+
+        class A(object):
+            pass
+
+        class B(A):
+            pass
+
+        class C(A):
+            pass
+
+        class D(B, C):
+            pass
+
+        class E(B):
+            pass
+
+        class F(C):
+            pass
+
+   If you have specified a module in the inheritance diagram like this::
+
+        .. inheritance-diagram::
+            dummy.test
+            :top-classes: dummy.test.B, dummy.test.C
+
+   any base classes which are ancestors to ``top-classes`` and are also defined
+   in the same module will be rendered as stand alone nodes. In this example
+   class A will be rendered as stand alone node in the graph. This is a known
+   issue due to how this extension works internally.
+
+   If you don't want class A (or any other ancestors) to be visible then specify
+   only the classes you would like to generate the diagram for like this::
+
+        .. inheritance-diagram::
+            dummy.test.D
+            dummy.test.E
+            dummy.test.F
+            :top-classes: dummy.test.B, dummy.test.C
+
+   .. versionchanged:: 1.7
+      Added ``top-classes`` option to limit the scope of inheritance graphs.
 
 New config values are: