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+// Copyright (c) 2012 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.
+
+// Javascript module pattern:
+// see http://en.wikipedia.org/wiki/Unobtrusive_JavaScript#Namespaces
+// In essence, we define an anonymous function which is immediately called and
+// returns a new object. The new object contains only the exported definitions;
+// all other definitions in the anonymous function are inaccessible to external
+// code.
+var common = (function () {
+
+ var addListener = function(elt, event_name, callback) {
+ if (elt.addEventListener) {
+ elt.addEventListener(event_name, callback, false);
+ } else {
+ elt.attachEvent('on' + event_name, callback);
+ }
+ };
+
+ var getImageDataBuffer = function(imageData) {
+ var buffer = imageData.data.buffer;
+ // IE support
+ if(buffer === undefined) {
+ buffer = new ArrayBuffer(imageData.data.length);
+ view = new Uint8Array(buffer);
+ for (var i = 0; i < imageData.data.length; i++) {
+ view[i] = imageData.data[i];
+ }
+ }
+ return buffer;
+ }
+
+ nacl.createInstance = function(config) {
+ var variant = config.module;
+ var e;
+ var width = config.width;
+ var height = config.height;
+ var type = variant.type;
+ if (type == "pnacl") {
+ e = nacl.createEmbedInstance(variant.url, nacl.pnaclMimeType, width, height);
+ } else if (type == "emscripten") {
+ e = nacl.createEmscriptenInstance(variant.url, width, height);
+ } else if (type == "nacl") {
+ e = nacl.createEmbedInstance(variant.url, nacl.naclMimeType, width, height);
+ } else if (type == "host") {
+ e = nacl.createEmbedInstance("bogusURL", nacl.mimetype, width, height);
+ } else {
+ throw new Error("Unknown variant type " + type);
+ }
+ if (config.init) {
+ config.init(e);
+ }
+ if (config.progress) {
+ e.addEventListener('progress', config.progress);
+ }
+ if (config.load) {
+ e.addEventListener('load', config.load);
+ }
+ if (config.error) {
+ e.addEventListener('error', config.error);
+ }
+ config.insert.appendChild(e);
+ e.load();
+ return e;
+ };
+
+ var loadStart;
+
+ /**
+ * Create the Native Client <embed> element as a child of the DOM element
+ * named "listener".
+ *
+ * @param {string} name The name of the example.
+ * @param {string} tool The name of the toolchain, e.g. "glibc", "newlib" etc.
+ * @param {string} path Directory name where .nmf file can be found.
+ * @param {number} width The width to create the plugin.
+ * @param {number} height The height to create the plugin.
+ * @param {Object} optional dictionary of args to send to DidCreateInstance
+ */
+ function createNaClModule(name, tool, path, width, height, args) {
+ loadStart = new Date();
+
+ var isRelease = path.toLowerCase().indexOf('release') != -1;
+
+ var progress = document.createElement('progress');
+ progress.style.width = '480px';
+
+ var modules = {
+ "pnacl": {
+ type: "pnacl",
+ url: path + '/' + name + '.nmf',
+ },
+ "nacl": {
+ type: "nacl",
+ url: path + '/' + name + '.nmf',
+ },
+ "emscripten": {
+ type: "emscripten",
+ url: path + '/' + name + '.js',
+ },
+ "host": {
+ type: "host",
+ mimetype: 'application/x-ppapi-' + (isRelease ? 'release' : 'debug'),
+ }
+ };
+
+ var moduleEl = nacl.createInstance({
+ module: modules[tool],
+ width: width,
+ height: height,
+ insert: document.getElementById('listener'),
+ init: function(e) {
+ e.setAttribute('name', 'nacl_module');
+ e.setAttribute('id', 'nacl_module');
+ e.setAttribute('path', path);
+ // Add any optional arguments
+ if (args) {
+ for (var key in args) {
+ e.setAttribute(key, args[key])
+ }
+ }
+ },
+ progress: function(evt) {
+ var loadPercent = -1.0;
+ progress.max = 100;
+ if (evt.lengthComputable && evt.total > 0) {
+ loadPercent = evt.loaded / evt.total * 100.0;
+ }
+ progress.value = loadPercent;
+ },
+ load: function(evt) {
+ progress.value = 100;
+ document.getElementById('listener').removeChild(progress);
+ },
+ error: function(evt) {
+ progress.value = 100;
+ document.getElementById('listener').removeChild(progress);
+ },
+ });
+
+ if (tool == 'pnacl' && !nacl.hasPNaCl()) {
+ updateStatus('PNaCl requires Chrome 31 or newer.');
+ } else if (tool == 'nacl' && !nacl.hasNaCl()) {
+ updateStatus('NaCl requires Chrome.');
+ } else {
+ document.getElementById('listener').appendChild(progress);
+ }
+
+ // Host plugins don't send a moduleDidLoad message. We'll fake it
+ // here.
+ var isHost = tool == 'win' || tool == 'linux' || tool == 'mac' || tool == 'host';
+ if (isHost) {
+ window.setTimeout(function () {
+ var evt = document.createEvent('Event');
+ evt.initEvent('load', true, true); // bubbles, cancelable
+ moduleEl.dispatchEvent(evt);
+ }, 100); // 100 ms
+ }
+ return moduleEl;
+ }
+
+ /**
+ * Add the default "load" and "message" event listeners to the element with
+ * id "listener".
+ *
+ * The "load" event is sent when the module is successfully loaded. The
+ * "message" event is sent when the naclModule posts a message using
+ * PPB_Messaging.PostMessage() (in C) or pp::Instance().PostMessage() (in
+ * C++).
+ */
+ function attachDefaultListeners() {
+ var listenerDiv = document.getElementById('listener');
+ listenerDiv.addEventListener('load', moduleDidLoad, true);
+ listenerDiv.addEventListener('message', handleMessage, true);
+ listenerDiv.addEventListener('crash', handleCrash, true);
+ if (typeof window.attachListeners !== 'undefined') {
+ window.attachListeners();
+ }
+ }
+
+
+ /**
+ * Called when the Browser can not communicate with the Module
+ *
+ * This event listener is registered in attachDefaultListeners above.
+ */
+ function handleCrash(event) {
+ updateStatus('module crashed')
+ if (typeof window.handleCrash !== 'undefined') {
+ window.handleCrash(common.naclModule.lastError);
+ }
+ }
+
+ /**
+ * Called when the NaCl module is loaded.
+ *
+ * This event listener is registered in attachDefaultListeners above.
+ */
+ function moduleDidLoad() {
+ common.naclModule = document.getElementById('nacl_module');
+ updateStatus('loaded');
+ console.log("Create instance: " + (new Date()-loadStart) + " ms");
+
+ if (typeof window.moduleDidLoad !== 'undefined') {
+ window.moduleDidLoad();
+ }
+ }
+
+ /**
+ * Hide the NaCl module's embed element.
+ *
+ * We don't want to hide by default; if we do, it is harder to determine that
+ * a plugin failed to load. Instead, call this function inside the example's
+ * "moduleDidLoad" function.
+ *
+ */
+ function hideModule() {
+ // Setting common.naclModule.style.display = "None" doesn't work; the
+ // module will no longer be able to receive postMessages.
+ common.naclModule.style.height = "0";
+ }
+
+ /**
+ * Return true when |s| starts with the string |prefix|.
+ *
+ * @param {string} s The string to search.
+ * @param {string} prefix The prefix to search for in |s|.
+ */
+ function startsWith(s, prefix) {
+ // indexOf would search the entire string, lastIndexOf(p, 0) only checks at
+ // the first index. See: http://stackoverflow.com/a/4579228
+ return s.lastIndexOf(prefix, 0) === 0;
+ }
+
+ /** Maximum length of logMessageArray. */
+ var kMaxLogMessageLength = 20;
+
+ /** An array of messages to display in the element with id "log". */
+ var logMessageArray = [];
+
+ /**
+ * Add a message to an element with id "log".
+ *
+ * This function is used by the default "log:" message handler.
+ *
+ * @param {string} message The message to log.
+ */
+ function logMessage(message) {
+ logMessageArray.push(message);
+ if (logMessageArray.length > kMaxLogMessageLength)
+ logMessageArray.shift();
+
+ document.getElementById('log').textContent = logMessageArray.join('');
+ console.log(message)
+ }
+
+ /**
+ */
+ var defaultMessageTypes = {
+ 'alert': alert,
+ 'log': logMessage
+ };
+
+ /**
+ * Called when the NaCl module sends a message to JavaScript (via
+ * PPB_Messaging.PostMessage())
+ *
+ * This event listener is registered in createNaClModule above.
+ *
+ * @param {Event} message_event A message event. message_event.data contains
+ * the data sent from the NaCl module.
+ */
+ function handleMessage(message_event) {
+ if (typeof message_event.data === 'string') {
+ for (var type in defaultMessageTypes) {
+ if (defaultMessageTypes.hasOwnProperty(type)) {
+ if (startsWith(message_event.data, type + ':')) {
+ func = defaultMessageTypes[type];
+ func(message_event.data.slice(type.length + 1));
+ return;
+ }
+ }
+ }
+ }
+
+ if (typeof window.handleMessage !== 'undefined') {
+ window.handleMessage(message_event);
+ }
+ }
+
+ /**
+ * Called when the DOM content has loaded; i.e. the page's document is fully
+ * parsed. At this point, we can safely query any elements in the document via
+ * document.querySelector, document.getElementById, etc.
+ *
+ * @param {string} name The name of the example.
+ * @param {string} tool The name of the toolchain, e.g. "glibc", "newlib" etc.
+ * @param {string} path Directory name where .nmf file can be found.
+ * @param {number} width The width to create the plugin.
+ * @param {number} height The height to create the plugin.
+ */
+ function domContentLoaded(name, tool, path, width, height) {
+ // If the page loads before the Native Client module loads, then set the
+ // status message indicating that the module is still loading. Otherwise,
+ // do not change the status message.
+ updateStatus('page loaded');
+ if (common.naclModule == null) {
+ updateStatus('creating ' + tool + ' embed')
+
+ // We use a non-zero sized embed to give Chrome space to place the bad
+ // plug-in graphic, if there is a problem.
+ width = typeof width !== 'undefined' ? width : 200;
+ height = typeof height !== 'undefined' ? height : 200;
+ attachDefaultListeners();
+ createNaClModule(name, tool, path, width, height);
+ } else {
+ // It's possible that the Native Client module onload event fired
+ // before the page's onload event. In this case, the status message
+ // will reflect 'SUCCESS', but won't be displayed. This call will
+ // display the current message.
+ updateStatus('waiting');
+ }
+ }
+
+ /** Saved text to display in the element with id 'statusField'. */
+ var statusText = 'NO-STATUSES';
+
+ /**
+ * Set the global status message. If the element with id 'statusField'
+ * exists, then set its HTML to the status message as well.
+ *
+ * @param {string} opt_message The message to set. If null or undefined, then
+ * set element 'statusField' to the message from the last call to
+ * updateStatus.
+ */
+ function updateStatus(opt_message) {
+ if (opt_message) {
+ statusText = opt_message;
+ }
+ var statusField = document.getElementById('statusField');
+ if (statusField) {
+ statusField.innerHTML = statusText;
+ }
+ }
+
+ // The symbols to export.
+ return {
+ /** A reference to the NaCl module, once it is loaded. */
+ naclModule: null,
+
+ addListener: addListener,
+ getImageDataBuffer: getImageDataBuffer,
+ attachDefaultListeners: attachDefaultListeners,
+ domContentLoaded: domContentLoaded,
+ createNaClModule: createNaClModule,
+ hideModule: hideModule,
+ logMessage: logMessage,
+ updateStatus: updateStatus
+ };
+
+}());
+
+// Listen for the DOM content to be loaded. This event is fired when parsing of
+// the page's document has finished.
+//common.addListener(document, 'DOMContentLoaded', function() {
+window.onload = function() {
+ var body = document.querySelector('body');
+
+ var loadFunction = common.domContentLoaded;
+ // The data-* attributes on the body can be referenced via body.dataset.
+ if (body.dataset && body.dataset.customLoad && typeof window.domContentLoaded !== 'undefined') {
+ loadFunction = window.domContentLoaded;
+ }
+
+ // From https://developer.mozilla.org/en-US/docs/DOM/window.location
+ var searchVars = {};
+ if (window.location.search.length > 1) {
+ var pairs = window.location.search.substr(1).split("&");
+ for (var key_ix = 0; key_ix < pairs.length; key_ix++) {
+ var keyValue = pairs[key_ix].split("=");
+ searchVars[unescape(keyValue[0])] =
+ keyValue.length > 1 ? unescape(keyValue[1]) : "";
+ }
+ }
+ if (loadFunction) {
+ var name = body.getAttribute("data-name");
+ var tc = body.getAttribute("data-tc");
+ var path = body.getAttribute("data-path");
+ var width = body.getAttribute("data-width") || undefined;
+ var height = body.getAttribute("data-height") || undefined;
+
+ var toolchains = (body.getAttribute("data-tools") || tc || "emscripten newlib pnacl").split(' ');
+ var configs = (body.getAttribute("data-configs") || "Debug Release").split(' ');
+
+ var tc = toolchains.indexOf(searchVars.tc) !== -1 ?
+ searchVars.tc : toolchains[0];
+ var config = configs.indexOf(searchVars.config) !== -1 ?
+ searchVars.config : configs[0];
+ path = path.replace('{tc}', tc).replace('{config}', config);
+
+ // The SDK uses the pnacl toolchain to compile nexes in Debug mode.
+ if (tc == 'pnacl' && config == 'Debug') {
+ tc = 'nacl';
+ }
+ if (tc == 'newlib') {
+ tc = 'nacl';
+ }
+ if (tc == 'win' || tc == 'linux' || tc == 'mac') {
+ tc = 'host';
+ }
+ loadFunction(name, tc, path, width, height);
+ }
+};
+//});