feat(editor): support pasting Excel data into database block (#9618)

close: BS-2338

tests/affine-local/e2e/blocksuite/database/clipboard.spec.ts

@@ -0,0 +1,72 @@
+import { test } from '@affine-test/kit/playwright';
+import { openHomePage } from '@affine-test/kit/utils/load-page';
+import { waitForEditorLoad } from '@affine-test/kit/utils/page-logic';
+
+import {
+  initDatabaseWithRows,
+  pasteExcelData,
+  selectFirstCell,
+  verifyCellContents,
+} from './utils';
+
+test.describe('Database Clipboard Operations', () => {
+  test('paste tab-separated data from Excel into database', async ({
+    page,
+  }) => {
+    // Open the home page and wait for the editor to load
+    await openHomePage(page);
+    await waitForEditorLoad(page);
+
+    // Create a database block with two rows
+    await initDatabaseWithRows(page, 2);
+
+    // Select the first cell and paste data
+    await selectFirstCell(page);
+    const mockExcelData = 'Cell 1A\tCell 1B\nCell 2A\tCell 2B';
+    await pasteExcelData(page, mockExcelData);
+
+    // Verify cell contents
+    await verifyCellContents(page, [
+      'Cell 1A',
+      'Cell 1B',
+      'Cell 2A',
+      'Cell 2B',
+    ]);
+  });
+
+  test('handle empty cells when pasting tab-separated data', async ({
+    page,
+  }) => {
+    // Open the home page and wait for the editor to load
+    await openHomePage(page);
+    await waitForEditorLoad(page);
+
+    // Create a database block with two rows
+    await initDatabaseWithRows(page, 2);
+
+    // Select the first cell and paste data with empty cells
+    await selectFirstCell(page);
+    const mockExcelData = 'Cell 1A\t\nCell 2A\tCell 2B';
+    await pasteExcelData(page, mockExcelData);
+
+    // Verify cell contents including empty cells
+    await verifyCellContents(page, ['Cell 1A', '', 'Cell 2A', 'Cell 2B']);
+  });
+
+  test('handle pasting data larger than selected area', async ({ page }) => {
+    // Open the home page and wait for the editor to load
+    await openHomePage(page);
+    await waitForEditorLoad(page);
+
+    // Create a database block with one row
+    await initDatabaseWithRows(page, 1);
+
+    // Select the first cell and paste data larger than table
+    await selectFirstCell(page);
+    const mockExcelData = 'Cell 1A\tCell 1B\nCell 2A\tCell 2B';
+    await pasteExcelData(page, mockExcelData);
+
+    // Verify only the cells that exist are filled
+    await verifyCellContents(page, ['Cell 1A', 'Cell 1B']);
+  });
+});