Desktop: Fixes #10007: Fixed Toggle Comment & Delete/Duplicate/Sort Line Options in Beta Editor (#10016)

packages/editor/CodeMirror/editorCommands/duplicateLine.ts

@@ -0,0 +1,34 @@
+import { EditorSelection } from '@codemirror/state';
+import { Command, EditorView } from '@codemirror/view';
+
+const duplicateLine: Command = (editor: EditorView) => {
+	const state = editor.state;
+	const doc = state.doc;
+
+	const transaction = state.changeByRange(range => {
+		const currentLine = doc.lineAt(range.anchor);
+
+		let text, insertPos, selectionRange;
+		if (range.empty) {
+			text = `\n${currentLine.text}`;
+			insertPos = currentLine.to;
+			selectionRange = EditorSelection.cursor(currentLine.to + text.length);
+		} else {
+			text = doc.slice(range.from, range.to);
+			insertPos = range.to;
+			selectionRange = EditorSelection.range(range.to, range.to + text.length);
+		}
+		return {
+			range: selectionRange,
+			changes: [{
+				from: insertPos,
+				to: insertPos,
+				insert: text,
+			}],
+		};
+	});
+
+	editor.dispatch(transaction);
+	return true;
+};
+export default duplicateLine;