优化整体结构

packages/artplayer/src/events/clickInit.js

@@ -5,9 +5,10 @@ export default function clickInit(art, events) {
     events.proxy(document, ['click', 'contextmenu'], event => {
         if (event.composedPath().indexOf($player) > -1) {
             art.isFocus = true;
+            art.emit('focus');
         } else {
             art.isFocus = false;
-            art.contextmenu.hide();
+            art.emit('blur');
         }
     });
 }