Added scripting interface implementation for triggers

Author: skymen

src/runtime/instance.js

@@ -11,9 +11,42 @@ export default function (parentClass) {
     }
 
     _trigger(method) {
+      this.dispatch(method);
       super._trigger(self.C3[AddonTypeMap[addonType]][id].Cnds[method]);
     }
 
+    on(tag, callback, options) {
+      if (!this.events[tag]) {
+        this.events[tag] = [];
+      }
+      this.events[tag].push({ callback, options });
+    }
+
+    off(tag, callback) {
+      if (this.events[tag]) {
+        this.events[tag] = this.events[tag].filter(
+          (event) => event.callback !== callback
+        );
+      }
+    }
+
+    dispatch(tag) {
+      if (this.events[tag]) {
+        this.events[tag].forEach((event) => {
+          if (event.options && event.options.params) {
+            const fn = self.C3[AddonTypeMap[addonType]][id].Cnds[tag];
+            if (fn && !fn.call(this, ...event.options.params)) {
+              return;
+            }
+          }
+          event.callback();
+          if (event.options && event.options.once) {
+            this.off(tag, event.callback);
+          }
+        });
+      }
+    }
+
     _release() {
       super._release();
     }