修改部分规则模块删除无用前端 新增前端界面

modeler/src/utils/event.ts

@@ -0,0 +1,70 @@
+/*
+ * This file is part of the kernelstudio package.
+ *
+ * (c) 2014-2025 zlin <admin@kernelstudio.com>
+ *
+ * For the full copyright and license information, please view the LICENSE file
+ * that was distributed with this source code.
+ */
+
+export class EventError {
+  code: number;
+  status: number;
+  message: string | null;
+  stack: string | null;
+
+  constructor(code = 500, status = 500, message: string | null = null, stack: string | null = null) {
+    this.code = code;
+    this.status = status;
+    this.message = message;
+    this.stack = stack;
+  }
+}
+
+export class EventListener {
+
+  private readonly _listeners: Record<string, Function[]>;
+
+  constructor(listeners: Record<string, Function[]> = {}) {
+    this._listeners = listeners;
+  }
+
+  all(): Record<string, Function[]> {
+    return {...this._listeners}; // 返回副本，避免外部直接修改
+  }
+
+  has(name: string): boolean {
+    return Array.isArray(this._listeners[name]) && this._listeners[name].length > 0;
+  }
+
+  on(name: string, fn: Function): void {
+    if (!Array.isArray(this._listeners[name])) {
+      this._listeners[name] = [];
+    }
+    this._listeners[name].push(fn);
+  }
+
+  off(name: string): void {
+    delete this._listeners[name];
+  }
+
+  emit(name: string, options?: any): void {
+    const listeners = this._listeners[name];
+    if (Array.isArray(listeners)) {
+      // 复制一份避免在执行中修改数组导致问题
+      [...listeners].forEach(f => f(options));
+    }
+  }
+}
+
+export const safePreventDefault = (event: any) => {
+  if (event && typeof event.preventDefault === 'function') {
+    event.preventDefault();
+  }
+}
+
+export const safeStopPropagation = (event: any) => {
+  if (event && typeof event.stopPropagation === 'function') {
+    event.stopPropagation();
+  }
+}