introduce Fragments class which is to be upper concept of interface.

present barcardi is focused to interfaces, but Fragments are needed
to implment other things.
(eg. enums, dictionaries, typedefs and implements statements)

https://heycam.github.io/webidl/#dfn-idl-fragment

ISSUE=lunchclass#80

generator/idl_parser/idls.ts

@@ -65,12 +65,36 @@ export class InterfaceImpl implements Interface {
   name: string;
   members: Array<InterfaceMemberImpl>;
 
-  constructor(raw_idl_info: any) {
-    this.name = raw_idl_info.name;
+  constructor(interface_info: any) {
+    this.name = interface_info.name;
 
     this.members = new Array<InterfaceMemberImpl>();
-    raw_idl_info.members.forEach(member => {
+    interface_info.members.forEach(member => {
       this.members.push(new InterfaceMemberImpl(member));
     });
   }
 }
+
+export class EnumImpl {
+  // FIXME(hwanseung): should be implement Enum
+  constructor(enum_info: any) {}
+}
+
+export class Fragments {
+  interfaces: Array<InterfaceImpl>;
+  enums: Array<EnumImpl>;
+
+  constructor(raw_idl_infos: any) {
+    raw_idl_infos.forEach(raw_idl_info => {
+      this.interfaces = new Array<InterfaceImpl>();
+      this.enums = new Array<EnumImpl>();
+      if (raw_idl_info['type'] == 'interface') {
+        this.interfaces.push(new InterfaceImpl(raw_idl_info));
+      } else if (raw_idl_info['type'] == 'enum') {
+        this.enums.push(new EnumImpl(raw_idl_info));
+      } else {
+        // FIXME: should implement dictionary, typedefs or etc.
+      }
+    });
+  }
+}

generator/main.ts

@@ -27,7 +27,7 @@ async function generateInterface(
     env: nunjucks.Environment, input_idl_path: string, output_path: string) {
   const parsedData =
       webidl.parse(await file.read(path.resolve(input_idl_path)));
-  const idl_interface: idls.Interface = new idls.InterfaceImpl(parsedData[0]);
+  const idl_fragments: idls.Fragments = new idls.Fragments(parsedData);
 
   const [header_tmpl, cpp_tmpl] = await Promise.all([
     file.read(path.resolve(TEMPLATE_DIR, 'interface_header.njk')),
@@ -37,9 +37,10 @@ async function generateInterface(
   const header_file_path = path.resolve(output_path, idl_name + '_bridge.h');
   const cpp_file_path = path.resolve(output_path, idl_name + '_bridge.cc');
 
+  // FIXME: should make each files per interfaces.
   return Promise.all([
-    file.write(header_file_path, env.renderString(header_tmpl, idl_interface)),
-    file.write(cpp_file_path, env.renderString(cpp_tmpl, idl_interface))
+    file.write(header_file_path, env.renderString(header_tmpl, idl_fragments.interfaces[0])),
+    file.write(cpp_file_path, env.renderString(cpp_tmpl, idl_fragments.interfaces[0]))
   ]);
 }