| // 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 sendRunOrClosePipeMessage(receiver, runOrClosePipeMessageParams) { |
| var messageName = mojo.interface_control2.kRunOrClosePipeMessageId; |
| var payloadSize = |
| mojo.interface_control2.RunOrClosePipeMessageParams.encodedSize; |
| var builder = new internal.MessageBuilder(messageName, payloadSize); |
| builder.encodeStruct(mojo.interface_control2.RunOrClosePipeMessageParams, |
| runOrClosePipeMessageParams); |
| var message = builder.finish(); |
| receiver.accept(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.interface_control2.kRunMessageId) { |
| throw new Error("Control message name is not kRunMessageId"); |
| } |
| |
| // Validate payload. |
| error = mojo.interface_control2.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.interface_control2.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.interface_control2.kRunMessageId; |
| var payloadSize = mojo.interface_control2.RunMessageParams.encodedSize; |
| // |requestID| is set to 0, but is later properly set by Router. |
| var builder = new internal.MessageWithRequestIDBuilder(messageName, |
| payloadSize, internal.kMessageExpectsResponse, 0); |
| builder.encodeStruct(mojo.interface_control2.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.interface_control2.RunMessageParams(); |
| runMessageParams.input = new mojo.interface_control2.RunInput(); |
| runMessageParams.input.query_version = |
| new mojo.interface_control2.QueryVersion(); |
| |
| return sendRunMessage(this.receiver, runMessageParams).then(function( |
| runResponseMessageParams) { |
| return runResponseMessageParams.output.query_version_result.version; |
| }); |
| }; |
| |
| ControlMessageProxy.prototype.requireVersion = function(version) { |
| var runOrClosePipeMessageParams = new |
| mojo.interface_control2.RunOrClosePipeMessageParams(); |
| runOrClosePipeMessageParams.input = new |
| mojo.interface_control2.RunOrClosePipeInput(); |
| runOrClosePipeMessageParams.input.require_version = new |
| mojo.interface_control2.RequireVersion({'version': version}); |
| sendRunOrClosePipeMessage(this.receiver, runOrClosePipeMessageParams); |
| }; |
| |
| internal.ControlMessageProxy = ControlMessageProxy; |
| })(); |