chromecast/common/mojom/js_channel.mojom

// Copyright 2019 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.

module chromecast.mojom;

// Send a message on this channel to the browser.
interface JsChannel {
  // Message from javascript.
  PostMessage(string message);
};

// Implemented on the renderer, this gets notified by the browser to
// add/remove channels as needed.
interface JsChannelClient {
  // Add a new channel binding, connecting window.channel.postMessage to |pipe|.
  CreateChannel(string channel, pending_remote<JsChannel> pipe);
  // Remove any existing channel binding.
  RemoveChannel(string channel);
};

// Implemented by the browser.
interface JsChannelBindingProvider {
  // The RenderFrame reports its routing ID to the browser here and provides the
  // pipe to manage channels.
  Register(int32 routing_id, pending_remote<JsChannelClient> client);
};