ENH: model info display UI

Change-Id: I066c0e7f8ce87ec00b1141a1b44430444a819b42
(cherry picked from commit 05907a1a42da82737090d55046974d401f8af057)

resources/web/include/swiper/core/events-emitter.js

@@ -0,0 +1,108 @@
+/* eslint-disable no-underscore-dangle */
+export default {
+  on(events, handler, priority) {
+    const self = this;
+    if (typeof handler !== 'function') return self;
+    const method = priority ? 'unshift' : 'push';
+    events.split(' ').forEach(event => {
+      if (!self.eventsListeners[event]) self.eventsListeners[event] = [];
+      self.eventsListeners[event][method](handler);
+    });
+    return self;
+  },
+
+  once(events, handler, priority) {
+    const self = this;
+    if (typeof handler !== 'function') return self;
+
+    function onceHandler(...args) {
+      self.off(events, onceHandler);
+
+      if (onceHandler.__emitterProxy) {
+        delete onceHandler.__emitterProxy;
+      }
+
+      handler.apply(self, args);
+    }
+
+    onceHandler.__emitterProxy = handler;
+    return self.on(events, onceHandler, priority);
+  },
+
+  onAny(handler, priority) {
+    const self = this;
+    if (typeof handler !== 'function') return self;
+    const method = priority ? 'unshift' : 'push';
+
+    if (self.eventsAnyListeners.indexOf(handler) < 0) {
+      self.eventsAnyListeners[method](handler);
+    }
+
+    return self;
+  },
+
+  offAny(handler) {
+    const self = this;
+    if (!self.eventsAnyListeners) return self;
+    const index = self.eventsAnyListeners.indexOf(handler);
+
+    if (index >= 0) {
+      self.eventsAnyListeners.splice(index, 1);
+    }
+
+    return self;
+  },
+
+  off(events, handler) {
+    const self = this;
+    if (!self.eventsListeners) return self;
+    events.split(' ').forEach(event => {
+      if (typeof handler === 'undefined') {
+        self.eventsListeners[event] = [];
+      } else if (self.eventsListeners[event]) {
+        self.eventsListeners[event].forEach((eventHandler, index) => {
+          if (eventHandler === handler || eventHandler.__emitterProxy && eventHandler.__emitterProxy === handler) {
+            self.eventsListeners[event].splice(index, 1);
+          }
+        });
+      }
+    });
+    return self;
+  },
+
+  emit(...args) {
+    const self = this;
+    if (!self.eventsListeners) return self;
+    let events;
+    let data;
+    let context;
+
+    if (typeof args[0] === 'string' || Array.isArray(args[0])) {
+      events = args[0];
+      data = args.slice(1, args.length);
+      context = self;
+    } else {
+      events = args[0].events;
+      data = args[0].data;
+      context = args[0].context || self;
+    }
+
+    data.unshift(context);
+    const eventsArray = Array.isArray(events) ? events : events.split(' ');
+    eventsArray.forEach(event => {
+      if (self.eventsAnyListeners && self.eventsAnyListeners.length) {
+        self.eventsAnyListeners.forEach(eventHandler => {
+          eventHandler.apply(context, [event, ...data]);
+        });
+      }
+
+      if (self.eventsListeners && self.eventsListeners[event]) {
+        self.eventsListeners[event].forEach(eventHandler => {
+          eventHandler.apply(context, data);
+        });
+      }
+    });
+    return self;
+  }
+
+};