Initial project import

node_modules/promise-worker-transferable/index.js

@@ -0,0 +1,73 @@
+'use strict';
+
+/* istanbul ignore next */
+var MyPromise = typeof Promise !== 'undefined' ? Promise : require('lie');
+
+var messageIds = 0;
+
+function onMessage(self, e) {
+  var message = e.data;
+  if (!Array.isArray(message) || message.length < 2) {
+    // Ignore - this message is not for us.
+    return;
+  }
+  var messageId = message[0];
+  var error = message[1];
+  var result = message[2];
+
+  var callback = self._callbacks[messageId];
+
+  if (!callback) {
+    // Ignore - user might have created multiple PromiseWorkers.
+    // This message is not for us.
+    return;
+  }
+
+  delete self._callbacks[messageId];
+  callback(error, result);
+}
+
+function PromiseWorker(worker) {
+  var self = this;
+  self._worker = worker;
+  self._callbacks = {};
+
+  worker.addEventListener('message', function (e) {
+    onMessage(self, e);
+  });
+}
+
+PromiseWorker.prototype.postMessage = function (userMessage, transferList) {
+  var self = this;
+  var messageId = messageIds++;
+
+  var messageToSend = [messageId, userMessage];
+
+  return new MyPromise(function (resolve, reject) {
+    self._callbacks[messageId] = function (error, result) {
+      if (error) {
+        return reject(new Error(error.message));
+      }
+      resolve(result);
+    };
+    /* istanbul ignore if */
+    if (typeof self._worker.controller !== 'undefined') {
+      // service worker, use MessageChannels because e.source is broken in Chrome < 51:
+      // https://bugs.chromium.org/p/chromium/issues/detail?id=543198
+      var channel = new MessageChannel();
+      channel.port1.onmessage = function (e) {
+        onMessage(self, e);
+      };
+      self._worker.controller.postMessage(messageToSend, [channel.port2].concat(transferList));
+    } else {
+      // web worker
+      self._worker.postMessage(messageToSend, transferList);
+    }
+  });
+};
+
+PromiseWorker.prototype.terminate = function () {
+    this._worker.terminate();
+}
+
+module.exports = PromiseWorker;