1// Copyright 2013 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5var SendResponse = requireNative('pepper_request_natives').SendResponse; 6var GetAvailability = requireNative('v8_context').GetAvailability; 7var utils = require('utils'); 8var schemaRegistry = requireNative('schema_registry'); 9 10function takesCallback(targetName) { 11 var parts = $String.split(targetName, '.'); 12 var schemaName = $Array.join($Array.slice(parts, 0, parts.length - 1), '.'); 13 var functionName = parts[parts.length - 1]; 14 var functions = schemaRegistry.GetSchema(schemaName).functions; 15 var parameters = utils.lookup(functions, 'name', functionName).parameters; 16 return parameters.length > 0 && 17 parameters[parameters.length - 1].type == 'function'; 18} 19 20function resolveName(name) { 21 var availability = GetAvailability(name); 22 if (!availability.is_available) 23 throw Error(availability.message); 24 var item = chrome; 25 var nameComponents = $String.split(name, '.'); 26 for (var i = 0; i < nameComponents.length; i++) { 27 item = item[nameComponents[i]]; 28 } 29 return item; 30} 31 32function startRequest(targetName, requestId) { 33 var args = $Array.slice(arguments, 2); 34 try { 35 var hasCallback = takesCallback(targetName); 36 if (hasCallback) { 37 args.push(function() { 38 var error = null; 39 if (chrome.runtime.lastError) 40 error = chrome.runtime.lastError.message; 41 SendResponse(requestId, $Array.slice(arguments), error); 42 }); 43 } 44 var target = resolveName(targetName); 45 var result = $Function.apply(target, null, args); 46 if (!hasCallback) 47 SendResponse(requestId, [result], null); 48 } catch (e) { 49 // TODO(sammc): Catch this from C++. 50 return e.message; 51 } 52} 53 54exports.startRequest = startRequest; 55