Implement Mojo message codec in JavaScript

mojo/public/bindings/js/test/sample_service.js

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// "Generated" code for sample_service.mojom
+define([
+    "mojo/public/bindings/js/codec",
+  ], function(codec) {
+
+  // Bar ----------------------------------------------------------------------
+
+  function Bar() {
+    this.alpha = 0;
+    this.beta = 0;
+    this.gamma = 0;
+  }
+
+  Bar.encodedSize = codec.kStructHeaderSize + 8;
+
+  Bar.decode = function(decoder) {
+    var val = new Bar();
+    var numberOfBytes = decoder.read32();
+    var numberOfFields = decoder.read32();
+    // TODO(abarth): We need to support optional fields.
+    val.alpha = decoder.read8();
+    val.beta = decoder.read8();
+    val.gamma = decoder.read8();
+    decoder.skip(5);
+    return val;
+  };
+
+  Bar.encode = function(encoder, val) {
+    encoder.write32(Bar.encodedSize);
+    encoder.write32(3);
+    encoder.write8(val.alpha);
+    encoder.write8(val.beta);
+    encoder.write8(val.gamma);
+    encoder.skip(5);
+  };
+
+  // Foo ----------------------------------------------------------------------
+
+  function Foo() {
+    this.x = 0;
+    this.y = 0;
+    this.a = 0;
+    this.b = 0;
+    this.c = 0;
+    this.bar = null;
+    this.data = [];
+    this.extra_bars = [];
+    this.name = "";
+    this.files = [];
+  }
+
+  Foo.encodedSize = codec.kStructHeaderSize + 64;
+
+  Foo.decode = function(decoder) {
+    var val = new Foo();
+    var numberOfBytes = decoder.read32();
+    var numberofFields = decoder.read32();
+    // TODO(abarth): We need to support optional fields.
+    val.x = decoder.read32();
+    val.y = decoder.read32();
+    var packed = decoder.read8();
+    val.a = (packed >> 0) & 1;
+    val.b = (packed >> 1) & 1;
+    val.c = (packed >> 2) & 1;
+    decoder.skip(7);
+    val.bar = decoder.decodeStructPointer(Bar);
+    val.data = decoder.decodeArrayPointer(codec.Uint8);
+    val.extra_bars = decoder.decodeArrayPointer(new codec.PointerTo(Bar));
+    val.name = decoder.decodeStringPointer();
+    val.files = decoder.decodeArrayPointer(codec.Handle);
+    return val;
+  }
+
+  Foo.encode = function(encoder, val) {
+    encoder.write32(Foo.encodedSize);
+    encoder.write32(10);
+    encoder.write32(val.x);
+    encoder.write32(val.y);
+    var packed = (val.a & 1) << 0 |
+                 (val.b & 1) << 1 |
+                 (val.c & 1) << 2;
+    encoder.write8(packed);
+    encoder.skip(7);
+    encoder.encodeStructPointer(Bar, val.bar);
+    encoder.encodeArrayPointer(codec.Uint8, val.data);
+    encoder.encodeArrayPointer(new codec.PointerTo(Bar), val.extra_bars);
+    encoder.encodeStringPointer(val.name);
+    encoder.encodeArrayPointer(codec.Handle, val.files);
+  };
+
+  var exports = {};
+  exports.Bar = Bar;
+  exports.Foo = Foo;
+  return exports;
+});