From: hyunduk.kim <hyunduk.kim@samsung.com>
Date: Mon, 13 Apr 2020 07:00:46 +0000 (+0900)
Subject: [Addon] Add 'once' method for wrappedEventEmitter
X-Git-Tag: submit/tizen_5.5/20200625.010053~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7709dd88a9dcd6fcf8a34c2e188b3fb664cba09a;p=platform%2Fframework%2Fweb%2Fwrtjs.git

[Addon] Add 'once' method for wrappedEventEmitter

This change will add a new method 'once'
which will work as same as 'once' of EventEmitter.

Change-Id: Ib07ffcdbe357af6b9c36b7a4e22ddf4c8a7f8669
Signed-off-by: hyunduk.kim <hyunduk.kim@samsung.com>
---

diff --git a/wrt_app/src/addon_manager.js b/wrt_app/src/addon_manager.js
index 6492b88c..0eb9b55e 100644
--- a/wrt_app/src/addon_manager.js
+++ b/wrt_app/src/addon_manager.js
@@ -207,6 +207,14 @@ class AddonManager {
                     this.evt_emitter_.off(eventName, this.addons_listeners[listener]);
                     delete this.addons_listeners[listener];
                 } else console.log('Listener is not registered');
+            },
+            once: (eventName, listener) => {
+                if (EventList.indexOf(eventName) === -1) {
+                    console.log(`Invalid Event: ${eventName}`);
+                } else if (!this.addons_listeners[listener]) {
+                    console.log(`A new one-time listener for ${eventName} is added`);
+                    this.evt_emitter_.once(eventName, getSafeFunction(listener));
+                } else console.log('Listener is already registered for the multiple-time use');
             }
         }
     }