Lexical: Improved table row copy/paste

Added safeguarding/matching of source/target sizes to prevent broken
tables.

resources/js/wysiwyg/utils/table-copy-paste.ts

@@ -0,0 +1,97 @@
+import {NodeClipboard} from "./node-clipboard";
+import {CustomTableRowNode} from "../nodes/custom-table-row";
+import {$getTableFromSelection, $getTableRowsFromSelection} from "./tables";
+import {$getSelection, LexicalEditor} from "lexical";
+import {$createCustomTableCellNode, $isCustomTableCellNode} from "../nodes/custom-table-cell";
+import {CustomTableNode} from "../nodes/custom-table";
+import {TableMap} from "./table-map";
+
+const rowClipboard: NodeClipboard<CustomTableRowNode> = new NodeClipboard<CustomTableRowNode>(CustomTableRowNode);
+
+export function isRowClipboardEmpty(): boolean {
+    return rowClipboard.size() === 0;
+}
+
+export function validateRowsToCopy(rows: CustomTableRowNode[]): void {
+    let commonRowSize: number|null = null;
+
+    for (const row of rows) {
+        const cells = row.getChildren().filter(n => $isCustomTableCellNode(n));
+        let rowSize = 0;
+        for (const cell of cells) {
+            rowSize += cell.getColSpan() || 1;
+            if (cell.getRowSpan() > 1) {
+                throw Error('Cannot copy rows with merged cells');
+            }
+        }
+
+        if (commonRowSize === null) {
+            commonRowSize = rowSize;
+        } else if (commonRowSize !== rowSize) {
+            throw Error('Cannot copy rows with inconsistent sizes');
+        }
+    }
+}
+
+export function validateRowsToPaste(rows: CustomTableRowNode[], targetTable: CustomTableNode): void {
+    const tableColCount = (new TableMap(targetTable)).columnCount;
+    for (const row of rows) {
+        const cells = row.getChildren().filter(n => $isCustomTableCellNode(n));
+        let rowSize = 0;
+        for (const cell of cells) {
+            rowSize += cell.getColSpan() || 1;
+        }
+
+        if (rowSize > tableColCount) {
+            throw Error('Cannot paste rows that are wider than target table');
+        }
+
+        while (rowSize < tableColCount) {
+            row.append($createCustomTableCellNode());
+            rowSize++;
+        }
+    }
+}
+
+export function $cutSelectedRowsToClipboard(): void {
+    const rows = $getTableRowsFromSelection($getSelection());
+    validateRowsToCopy(rows);
+    rowClipboard.set(...rows);
+    for (const row of rows) {
+        row.remove();
+    }
+}
+
+export function $copySelectedRowsToClipboard(): void {
+    const rows = $getTableRowsFromSelection($getSelection());
+    validateRowsToCopy(rows);
+    rowClipboard.set(...rows);
+}
+
+export function $pasteClipboardRowsBefore(editor: LexicalEditor): void {
+    const selection = $getSelection();
+    const rows = $getTableRowsFromSelection(selection);
+    const table = $getTableFromSelection(selection);
+    const lastRow = rows[rows.length - 1];
+    if (lastRow && table) {
+        const clipboardRows = rowClipboard.get(editor);
+        validateRowsToPaste(clipboardRows, table);
+        for (const row of clipboardRows) {
+            lastRow.insertBefore(row);
+        }
+    }
+}
+
+export function $pasteRowsAfter(editor: LexicalEditor): void {
+    const selection = $getSelection();
+    const rows = $getTableRowsFromSelection(selection);
+    const table = $getTableFromSelection(selection);
+    const lastRow = rows[rows.length - 1];
+    if (lastRow && table) {
+        const clipboardRows = rowClipboard.get(editor).reverse();
+        validateRowsToPaste(clipboardRows, table);
+        for (const row of clipboardRows) {
+            lastRow.insertAfter(row);
+        }
+    }
+}