summaryrefslogtreecommitdiffstats
path: root/addon-sdk/source/lib/sdk/addon/events.js
diff options
context:
space:
mode:
authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /addon-sdk/source/lib/sdk/addon/events.js
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
downloadUXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.gz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.lz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.xz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.zip
Add m-esr52 at 52.6.0
Diffstat (limited to 'addon-sdk/source/lib/sdk/addon/events.js')
-rw-r--r--addon-sdk/source/lib/sdk/addon/events.js56
1 files changed, 56 insertions, 0 deletions
diff --git a/addon-sdk/source/lib/sdk/addon/events.js b/addon-sdk/source/lib/sdk/addon/events.js
new file mode 100644
index 000000000..45bada6e1
--- /dev/null
+++ b/addon-sdk/source/lib/sdk/addon/events.js
@@ -0,0 +1,56 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+'use strict';
+
+module.metadata = {
+ 'stability': 'experimental'
+};
+
+var { request: hostReq, response: hostRes } = require('./host');
+var { defer: async } = require('../lang/functional');
+var { defer } = require('../core/promise');
+var { emit: emitSync, on, off } = require('../event/core');
+var { uuid } = require('../util/uuid');
+var emit = async(emitSync);
+
+// Map of IDs to deferreds
+var requests = new Map();
+
+// May not be necessary to wrap this in `async`
+// once promises are async via bug 881047
+var receive = async(function ({data, id, error}) {
+ let request = requests.get(id);
+ if (request) {
+ if (error) request.reject(error);
+ else request.resolve(clone(data));
+ requests.delete(id);
+ }
+});
+on(hostRes, 'data', receive);
+
+/*
+ * Send is a helper to be used in client APIs to send
+ * a request to host
+ */
+function send (eventName, data) {
+ let id = uuid();
+ let deferred = defer();
+ requests.set(id, deferred);
+ emit(hostReq, 'data', {
+ id: id,
+ data: clone(data),
+ event: eventName
+ });
+ return deferred.promise;
+}
+exports.send = send;
+
+/*
+ * Implement internal structured cloning algorithm in the future?
+ * http://www.whatwg.org/specs/web-apps/current-work/multipage/common-dom-interfaces.html#internal-structured-cloning-algorithm
+ */
+function clone (obj) {
+ return JSON.parse(JSON.stringify(obj || {}));
+}