feat: make clipboard more robust and reintroduce contextmenu actions (#7198)

src/tests/helpers/polyfills.ts

@@ -0,0 +1,91 @@
+class ClipboardEvent {
+  constructor(
+    type: "paste" | "copy",
+    eventInitDict: {
+      clipboardData: DataTransfer;
+    },
+  ) {
+    return Object.assign(
+      new Event("paste", {
+        bubbles: true,
+        cancelable: true,
+        composed: true,
+      }),
+      {
+        clipboardData: eventInitDict.clipboardData,
+      },
+    ) as any as ClipboardEvent;
+  }
+}
+
+type DataKind = "string" | "file";
+
+class DataTransferItem {
+  kind: DataKind;
+  type: string;
+  data: string | Blob;
+
+  constructor(kind: DataKind, type: string, data: string | Blob) {
+    this.kind = kind;
+    this.type = type;
+    this.data = data;
+  }
+
+  getAsString(callback: (data: string) => void): void {
+    if (this.kind === "string") {
+      callback(this.data as string);
+    }
+  }
+
+  getAsFile(): File | null {
+    if (this.kind === "file" && this.data instanceof File) {
+      return this.data;
+    }
+    return null;
+  }
+}
+
+class DataTransferList {
+  items: DataTransferItem[] = [];
+
+  add(data: string | File, type: string = ""): void {
+    if (typeof data === "string") {
+      this.items.push(new DataTransferItem("string", type, data));
+    } else if (data instanceof File) {
+      this.items.push(new DataTransferItem("file", type, data));
+    }
+  }
+
+  clear(): void {
+    this.items = [];
+  }
+}
+
+class DataTransfer {
+  public items: DataTransferList = new DataTransferList();
+  private _types: Record<string, string> = {};
+
+  get files() {
+    return this.items.items
+      .filter((item) => item.kind === "file")
+      .map((item) => item.getAsFile()!);
+  }
+
+  add(data: string | File, type: string = ""): void {
+    this.items.add(data, type);
+  }
+
+  setData(type: string, value: string) {
+    this._types[type] = value;
+  }
+
+  getData(type: string) {
+    return this._types[type] || "";
+  }
+}
+
+export const testPolyfills = {
+  ClipboardEvent,
+  DataTransfer,
+  DataTransferItem,
+};