Initial commit of 001code-html Scratch frontend project.

Includes scratch-gui, scratch-vm, scratch-blocks, scratch-render, scratch-l10n, and deployment config.

Co-authored-by: Cursor <cursoragent@cursor.com>

scratch-gui/static/js/PyodideWorkerPool.js

@@ -0,0 +1,87 @@
+// PyodideWorkerPool.js
+export default class PyodideWorkerPool {
+    constructor(poolSize = 2) {
+      this.poolSize = poolSize;
+      this.workers = [];
+      this.onMessageCallbacks = [];
+      this.initPool();
+    }
+  
+    initPool() {
+      for (let i = 0; i < this.poolSize; i++) {
+        this.workers.push(this.createWorker());
+      }
+    }
+  
+    createWorker() {
+      const workerInfo = {
+        worker: new Worker('js/pyodideWorker.js'),
+        busy: false,
+        loaded: false
+      };
+  
+      // 监听 Worker 消息
+      workerInfo.worker.onmessage = (event) => {
+        const { type } = event.data;
+        if (type === "finish") {
+          workerInfo.loaded = true;
+        }
+        if (type === "executionComplete" || type === "error") {
+          workerInfo.busy = false;
+        }
+        // 让外部知道“是哪个 worker 发来的消息”
+        for (let cb of this.onMessageCallbacks) {
+          cb(event, workerInfo);
+        }
+        this.updateIsPythonLoadOK();
+      };
+  
+      return workerInfo;
+    }
+  
+    addOnMessageListener(callback) {
+      this.onMessageCallbacks.push(callback);
+    }
+  
+    updateIsPythonLoadOK() {
+      // 只要至少一个 Worker loaded 就算可以执行
+      const anyLoaded = this.workers.some(w => w.loaded === true);
+      window.isPythonLoadOK = anyLoaded;
+    }
+  
+    // 找到不忙、且已loaded的 Worker
+    getFreeWorker() {
+      return this.workers.find(w => w.busy === false && w.loaded === true) || null;
+    }
+  
+    // 让指定 Worker 执行
+    runPython(workerInfo, code) {
+      if (workerInfo.busy) {
+        throw new Error("该 Worker 正在执行脚本，无法重复使用");
+      }
+      if (!workerInfo.loaded) {
+        throw new Error("该 Worker 尚未加载 Pyodide，无法执行 Python");
+      }
+      workerInfo.busy = true;
+      workerInfo.worker.postMessage({ type: "runPython", code });
+    }
+  
+    // 停止并替换
+    terminateAndReplace(workerInfo) {
+      workerInfo.worker.terminate();
+      const idx = this.workers.indexOf(workerInfo);
+      if (idx !== -1) {
+        const newW = this.createWorker();
+        this.workers[idx] = newW;
+      }
+      this.updateIsPythonLoadOK();
+    }
+  
+    destroyPool() {
+      for (let wInfo of this.workers) {
+        wInfo.worker.terminate();
+      }
+      this.workers = [];
+      this.updateIsPythonLoadOK();
+    }
+  }