feat(): support accessing specific event object in nested event callbacks

Author: weareoutman

etc/runtime.api.md

@@ -448,6 +448,8 @@ interface RuntimeContext extends LegacyCompatibleRuntimeContext {
     // (undocumented)
     ctxStore: DataStore<"CTX">;
     // (undocumented)
+    eventMap?: Map<string, Event>;
+    // (undocumented)
     forEachIndex?: number;
     // (undocumented)
     forEachItem?: unknown;

packages/runtime/src/internal/bindListeners.spec.ts

@@ -1120,21 +1120,40 @@ describe("listenerFactory for useProvider", () => {
   test("useProvider with callback", async () => {
     const brick = {
       element: {
-        callbackSuccess: jest.fn(),
+        callbackSuccess: jest.fn((_a: unknown, _b: unknown) =>
+          Promise.resolve("callback success")
+        ),
         callbackError: jest.fn(),
         callbackFinally: jest.fn(),
+        deepCallback: jest.fn(),
       },
     };
     listenerFactory(
       {
+        key: "initialEvent",
         useProvider: "my-timeout-provider",
         method: "willBeReplacedByResolve" as "resolve",
         args: [100, "resolved"],
         callback: {
           success: {
+            key: "timeoutEvent",
             target: "_self",
             method: "callbackSuccess",
-            args: ["<% EVENT.detail %>"],
+            args: [
+              "<% EVENT_BY_KEY.timeoutEvent.detail %>",
+              "<% EVENT_BY_KEY.initialEvent.detail %>",
+            ],
+            callback: {
+              success: {
+                target: "_self",
+                method: "deepCallback",
+                args: [
+                  "<% EVENT.detail %>",
+                  "<% EVENT_BY_KEY.timeoutEvent.detail %>",
+                  "<% EVENT_BY_KEY.initialEvent.detail %>",
+                ],
+              },
+            },
           },
           error: {
             target: "_self",
@@ -1159,9 +1178,17 @@ describe("listenerFactory for useProvider", () => {
     await new Promise((resolve) => setTimeout(resolve, 0));
     expect(myTimeoutProvider).toHaveBeenCalledTimes(1);
     await new Promise((resolve) => setTimeout(resolve, 100));
-    expect(brick.element.callbackSuccess).toHaveBeenCalledWith("resolved");
+    expect(brick.element.callbackSuccess).toHaveBeenCalledWith(
+      "resolved",
+      "ok"
+    );
     expect(brick.element.callbackError).not.toHaveBeenCalled();
     expect(brick.element.callbackFinally).toHaveBeenCalledWith(null);
+    expect(brick.element.deepCallback).toHaveBeenCalledWith(
+      "callback success",
+      "resolved",
+      "ok"
+    );
   });
 
   test("useProvider without args", async () => {

packages/runtime/src/internal/bindListeners.ts

@@ -123,11 +123,22 @@ export function isConditionalEventHandler(
 
 export function listenerFactory(
   handlers: BrickEventHandler | BrickEventHandler[],
-  runtimeContext: RuntimeContext,
+  _runtimeContext: RuntimeContext,
   runtimeBrick?: ElementHolder
 ) {
   return function (event: Event): void {
     for (const handler of ([] as BrickEventHandler[]).concat(handlers)) {
+      let runtimeContext = _runtimeContext;
+      if (handler.key && typeof handler.key === "string") {
+        runtimeContext = {
+          ..._runtimeContext,
+          eventMap: new Map([
+            ...(_runtimeContext.eventMap || []),
+            [handler.key, event],
+          ]),
+        };
+      }
+
       if (!checkIf(handler, { ...runtimeContext, event })) {
         if (handler.else) {
           listenerFactory(handler.else, runtimeContext, runtimeBrick)(event);

packages/runtime/src/internal/compute/evaluate.ts

@@ -189,6 +189,8 @@ function lowLevelEvaluate(
     options.lazy ||
     (attemptToVisitGlobals.has("EVENT") &&
       !hasOwnProperty(runtimeContext, "event")) ||
+    (attemptToVisitGlobals.has("EVENT_BY_KEY") &&
+      !hasOwnProperty(runtimeContext, "eventMap")) ||
     (attemptToVisitGlobals.has("DATA") &&
       !hasOwnProperty(runtimeContext, "data"))
   ) {
@@ -303,7 +305,8 @@ function lowLevelEvaluate(
   return {
     blockingList,
     run() {
-      const { ctxStore, data, event, unsafe_penetrate } = runtimeContext;
+      const { ctxStore, data, event, eventMap, unsafe_penetrate } =
+        runtimeContext;
 
       const penetrableCtx = unsafe_penetrate
         ? _internalApiGetRuntimeContext()!
@@ -360,6 +363,16 @@ function lowLevelEvaluate(
           case "EVENT":
             globalVariables[variableName] = event;
             break;
+          case "EVENT_BY_KEY":
+            globalVariables[variableName] = getDynamicReadOnlyProxy({
+              get(_target, key) {
+                return eventMap?.get(key as string);
+              },
+              ownKeys() {
+                return Array.from(eventMap?.keys() ?? []);
+              },
+            });
+            break;
           case "FLAGS":
             globalVariables[variableName] = getReadOnlyProxy(flags);
             break;

packages/runtime/src/internal/interfaces.ts

@@ -31,6 +31,7 @@ export interface RuntimeContext extends LegacyCompatibleRuntimeContext {
   forEachSize?: number;
   appendI18nNamespace?: string;
   isolatedRoot?: symbol;
+  eventMap?: Map<string, Event>;
 
   formStateStoreMap: Map<string, DataStore<"FORM_STATE">>;
   formStateStoreId?: string;

packages/types/src/manifest.ts

@@ -1040,6 +1040,12 @@ export interface BuiltinBrickEventHandler {
 
   /** {@inheritDoc ConditionalEventHandler.else} */
   else?: BrickEventHandler | BrickEventHandler[];
+
+  /**
+   * 设置事件对象的 key 名，在处理器和回调中可以通过 `EVENT_BY_KEY.<key>` 来访问该事件对象。
+   * 主要用于在嵌套的多个层级的事件回调中引用指定的事件对象。
+   */
+  key?: string;
 }
 
 /**
@@ -1069,6 +1075,9 @@ export interface UseProviderEventHandler
 
   /** {@inheritDoc ConditionalEventHandler.else} */
   else?: BrickEventHandler | BrickEventHandler[];
+
+  /** {@inheritDoc BuiltinBrickEventHandler.key} */
+  key?: string;
 }
 
 /**
@@ -1151,6 +1160,9 @@ export interface BaseCustomBrickEventHandler {
 
   /** {@inheritDoc ConditionalEventHandler.else} */
   else?: BrickEventHandler | BrickEventHandler[];
+
+  /** {@inheritDoc BuiltinBrickEventHandler.key} */
+  key?: string;
 }
 
 /*
@@ -1163,6 +1175,8 @@ export interface ConditionalEventHandler {
   then: BrickEventHandler | BrickEventHandler[];
   /** 不满足条件分支 */
   else?: BrickEventHandler | BrickEventHandler[];
+  /** {@inheritDoc BuiltinBrickEventHandler.key} */
+  key?: string;
 }
 
 /**