pkg/docgen: moved model classes into minilibs

pkg/docgen/lib/src/models/doc_gen_type.dart

Index: pkg/docgen/lib/src/models/doc_gen_type.dart
diff --git a/pkg/docgen/lib/src/models/doc_gen_type.dart b/pkg/docgen/lib/src/models/doc_gen_type.dart
new file mode 100644
index 0000000000000000000000000000000000000000..df7ca2da8647138070a8f56b15b5d28f6866b293
--- /dev/null
+++ b/pkg/docgen/lib/src/models/doc_gen_type.dart
@@ -0,0 +1,60 @@
+library docgen.models.doc_gen_type;
+
+import '../exports/source_mirrors.dart';
+
+import '../library_helpers.dart';
+
+import 'library.dart';
+import 'mirror_based.dart';
+
+/// Docgen wrapper around the mirror for a return type, and/or its generic
+/// type parameters.
+///
+/// Return types are of a form [outer]<[inner]>.
+/// If there is no [inner] part, [inner] will be an empty list.
+///
+/// For example:
+///        int size()
+///          "return" :
+///            - "outer" : "dart-core.int"
+///              "inner" :
+///
+///        List<String> toList()
+///          "return" :
+///            - "outer" : "dart-core.List"
+///              "inner" :
+///                - "outer" : "dart-core.String"
+///                  "inner" :
+///
+///        Map<String, List<int>>
+///          "return" :
+///            - "outer" : "dart-core.Map"
+///              "inner" :
+///                - "outer" : "dart-core.String"
+///                  "inner" :
+///                - "outer" : "dart-core.List"
+///                  "inner" :
+///                    - "outer" : "dart-core.int"
+///                      "inner" :
+class DocGenType extends MirrorBased {
+  final TypeMirror mirror;
+  final Library owningLibrary;
+
+  DocGenType(this.mirror, this.owningLibrary);
+
+  Map toMap() {
+    var result = getDocgenObject(mirror, owningLibrary);
+    return {
+      // We may encounter types whose corresponding library has not been
+      // processed yet, so look up with the owningLibrary at the last moment.
+      'outer': result.packagePrefix + result.docName,
+      'inner': _createTypeGenerics(mirror).map((e) => e.toMap()).toList(),
+    };
+  }
+
+  /// Returns a list of [DocGenType] objects constructed from TypeMirrors.
+  List<DocGenType> _createTypeGenerics(TypeMirror mirror) {
+    if (mirror is! ClassMirror) return [];
+    return mirror.typeArguments.map((e) => new DocGenType(e, owningLibrary)).toList();
+  }
+}