events module

DIYgod · DIYgod · commit b387833730ef · 2018-03-02T11:27:44.000+08:00
diff --git a/src/js/events.js b/src/js/events.js
@@ -0,0 +1,44 @@
+class Events {
+    constructor () {
+        this.events = {};
+
+        this.audioEvents = [
+            'abort', 'canplay', 'canplaythrough', 'durationchange', 'emptied', 'ended', 'error',
+            'loadeddata', 'loadedmetadata', 'loadstart', 'mozaudioavailable', 'pause', 'play',
+            'playing', 'progress', 'ratechange', 'seeked', 'seeking', 'stalled', 'suspend',
+            'timeupdate', 'volumechange', 'waiting'
+        ];
+        this.playerEvents = [];
+    }
+
+    on (name, callback) {
+        if (this.type(name) && typeof callback === 'function') {
+            if (!this.events[name]) {
+                this.events[name] = [];
+            }
+            this.events[name].push(callback);
+        }
+    }
+
+    trigger (name, info) {
+        if (this.events[name] && this.events[name].length) {
+            for (let i = 0; i < this.events[name].length; i++) {
+                this.events[name][i](info);
+            }
+        }
+    }
+
+    type (name) {
+        if (this.playerEvents.indexOf(name) !== -1) {
+            return 'player';
+        }
+        else if (this.audioEvents.indexOf(name) !== -1) {
+            return 'audio';
+        }
+
+        console.error(`Unknown event name: ${name}`);
+        return null;
+    }
+}
+
+export default Events;
diff --git a/src/js/player.js b/src/js/player.js
@@ -9,6 +9,7 @@ import User from './user';
 import Lrc from './lrc';
 import Controller from './controller';
 import Timer from './timer';
+import Events from './events';
 
 const instances = [];
 
@@ -27,17 +28,7 @@ class APlayer {
         this.audios = [];
         this.mode = this.options.mode;
 
-        // define APlayer events
-        const eventTypes = ['play', 'pause', 'canplay', 'playing', 'ended', 'error'];
-        this.event = {};
-        for (let i = 0; i < eventTypes.length; i++) {
-            this.event[eventTypes[i]] = [];
-        }
-        this.trigger = (type) => {
-            for (let i = 0; i < this.event[type].length; i++) {
-                this.event[type][i]();
-            }
-        };
+        this.events = new Events();
 
         // multiple music
         this.playIndex = 0;
@@ -145,6 +136,12 @@ class APlayer {
             }
         });
 
+        for (let i = 0; i < this.events.audioEvents.length; i++) {
+            this.audio.addEventListener(this.events.audioEvents[i], () => {
+                this.events.trigger(this.events.audioEvents[i]);
+            });
+        }
+
         // show audio time: the metadata has loaded or changed
         this.audio.addEventListener('durationchange', () => {
             if (this.audio.duration !== 1) {           // compatibility: Android browsers will output 1 at first
@@ -344,12 +341,10 @@ class APlayer {
     }
 
     /**
-     * attach event
+     * bind events
      */
-    on (name, func) {
-        if (typeof func === 'function') {
-            this.event[name].push(func);
-        }
+    on (name, callback) {
+        this.events.on(name, callback);
     }
 
     /**
