| // Copyright 2017 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. |
| |
| (function() { |
| var internal = mojo.internal; |
| |
| function constructRunOrClosePipeMessage(runOrClosePipeInput) { |
| var runOrClosePipeMessageParams = new |
| mojo.interfaceControl.RunOrClosePipeMessageParams(); |
| runOrClosePipeMessageParams.input = runOrClosePipeInput; |
| |
| var messageName = mojo.interfaceControl.kRunOrClosePipeMessageId; |
| var payloadSize = |
| mojo.interfaceControl.RunOrClosePipeMessageParams.encodedSize; |
| var builder = new internal.MessageV0Builder(messageName, payloadSize); |
| builder.encodeStruct(mojo.interfaceControl.RunOrClosePipeMessageParams, |
| runOrClosePipeMessageParams); |
| var message = builder.finish(); |
| return message; |
| } |
| |
| function validateControlResponse(message) { |
| var messageValidator = new internal.Validator(message); |
| var error = messageValidator.validateMessageIsResponse(); |
| if (error != internal.validationError.NONE) { |
| throw error; |
| } |
| |
| if (message.getName() != mojo.interfaceControl.kRunMessageId) { |
| throw new Error("Control message name is not kRunMessageId"); |
| } |
| |
| // Validate payload. |
| error = mojo.interfaceControl.RunResponseMessageParams.validate( |
| messageValidator, message.getHeaderNumBytes()); |
| if (error != internal.validationError.NONE) { |
| throw error; |
| } |
| } |
| |
| function acceptRunResponse(message) { |
| validateControlResponse(message); |
| |
| var reader = new internal.MessageReader(message); |
| var runResponseMessageParams = reader.decodeStruct( |
| mojo.interfaceControl.RunResponseMessageParams); |
| |
| return Promise.resolve(runResponseMessageParams); |
| } |
| |
| /** |
| * Sends the given run message through the receiver. |
| * Accepts the response message from the receiver and decodes the message |
| * struct to RunResponseMessageParams. |
| * |
| * @param {Router} receiver. |
| * @param {RunMessageParams} runMessageParams to be sent via a message. |
| * @return {Promise} that resolves to a RunResponseMessageParams. |
| */ |
| function sendRunMessage(receiver, runMessageParams) { |
| var messageName = mojo.interfaceControl.kRunMessageId; |
| var payloadSize = mojo.interfaceControl.RunMessageParams.encodedSize; |
| // |requestID| is set to 0, but is later properly set by Router. |
| var builder = new internal.MessageV1Builder(messageName, |
| payloadSize, internal.kMessageExpectsResponse, 0); |
| builder.encodeStruct(mojo.interfaceControl.RunMessageParams, |
| runMessageParams); |
| var message = builder.finish(); |
| |
| return receiver.acceptAndExpectResponse(message).then(acceptRunResponse); |
| } |
| |
| function ControlMessageProxy(receiver) { |
| this.receiver_ = receiver; |
| } |
| |
| ControlMessageProxy.prototype.queryVersion = function() { |
| var runMessageParams = new mojo.interfaceControl.RunMessageParams(); |
| runMessageParams.input = new mojo.interfaceControl.RunInput(); |
| runMessageParams.input.queryVersion = |
| new mojo.interfaceControl.QueryVersion(); |
| |
| return sendRunMessage(this.receiver_, runMessageParams).then(function( |
| runResponseMessageParams) { |
| return runResponseMessageParams.output.queryVersionResult.version; |
| }); |
| }; |
| |
| ControlMessageProxy.prototype.requireVersion = function(version) { |
| var runOrClosePipeInput = new mojo.interfaceControl.RunOrClosePipeInput(); |
| runOrClosePipeInput.requireVersion = |
| new mojo.interfaceControl.RequireVersion({'version': version}); |
| var message = constructRunOrClosePipeMessage(runOrClosePipeInput); |
| this.receiver_.accept(message); |
| }; |
| |
| internal.ControlMessageProxy = ControlMessageProxy; |
| })(); |