pkg/compiler/lib/src/js_emitter/class_stub_generator.dart

// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

part of dart2js.js_emitter;

class ClassStubGenerator {
  final Namer namer;
  final Compiler compiler;
  final JavaScriptBackend backend;

  ClassStubGenerator(this.compiler, this.namer, this.backend);

  jsAst.Expression generateClassConstructor(ClassElement classElement,
                                            Iterable<String> fields) {
    // TODO(sra): Implement placeholders in VariableDeclaration position:
    //
    //     String constructorName = namer.getNameOfClass(classElement);
    //     return js.statement('function #(#) { #; }',
    //        [ constructorName, fields,
    //            fields.map(
    //                (name) => js('this.# = #', [name, name]))]));
    return js('function(#) { #; }',
        [fields,
         fields.map((name) => js('this.# = #', [name, name]))]);
  }

  jsAst.Expression generateGetter(Element member, String fieldName) {
    ClassElement cls = member.enclosingClass;
    String receiver = backend.isInterceptorClass(cls) ? 'receiver' : 'this';
    List<String> args = backend.isInterceptedMethod(member) ? ['receiver'] : [];
    return js('function(#) { return #.# }', [args, receiver, fieldName]);
  }

  jsAst.Expression generateSetter(Element member, String fieldName) {
    ClassElement cls = member.enclosingClass;
    String receiver = backend.isInterceptorClass(cls) ? 'receiver' : 'this';
    List<String> args = backend.isInterceptedMethod(member) ? ['receiver'] : [];
    // TODO(floitsch): remove 'return'?
    return js('function(#, v) { return #.# = v; }',
        [args, receiver, fieldName]);
  }
}