Support Transform to Kebab Case (microsoft#147956)

* 🍡 Support `Transform to Kebab Case`

* Fix eslint warnings

Co-authored-by: Alexandru Dima <[email protected]>

Author: mbelsky

src/vs/editor/contrib/linesOperations/browser/linesOperations.ts

@@ -1162,6 +1162,49 @@ export class SnakeCaseAction extends AbstractCaseAction {
 	}
 }
 
+export class KebabCaseAction extends AbstractCaseAction {
+
+	public static isSupported(): boolean {
+		const areAllRegexpsSupported = [
+			this.caseBoundary,
+			this.singleLetters,
+			this.underscoreBoundary,
+		].every((regexp) => regexp.isSupported());
+
+		return areAllRegexpsSupported;
+	}
+
+	private static caseBoundary = new BackwardsCompatibleRegExp('(\\p{Ll})(\\p{Lu})', 'gmu');
+	private static singleLetters = new BackwardsCompatibleRegExp('(\\p{Lu}|\\p{N})(\\p{Lu}\\p{Ll})', 'gmu');
+	private static underscoreBoundary = new BackwardsCompatibleRegExp('(\\S)(_)(\\S)', 'gm');
+
+	constructor() {
+		super({
+			id: 'editor.action.transformToKebabcase',
+			label: nls.localize('editor.transformToKebabcase', 'Transform to Kebab Case'),
+			alias: 'Transform to Kebab Case',
+			precondition: EditorContextKeys.writable
+		});
+	}
+
+	protected _modifyText(text: string, _: string): string {
+		const caseBoundary = KebabCaseAction.caseBoundary.get();
+		const singleLetters = KebabCaseAction.singleLetters.get();
+		const underscoreBoundary = KebabCaseAction.underscoreBoundary.get();
+
+		if (!caseBoundary || !singleLetters || !underscoreBoundary) {
+			// one or more regexps aren't supported
+			return text;
+		}
+
+		return text
+			.replace(underscoreBoundary, '$1-$3')
+			.replace(caseBoundary, '$1-$2')
+			.replace(singleLetters, '$1-$2')
+			.toLocaleLowerCase();
+	}
+}
+
 registerEditorAction(CopyLinesUpAction);
 registerEditorAction(CopyLinesDownAction);
 registerEditorAction(DuplicateSelectionAction);
@@ -1189,3 +1232,7 @@ if (SnakeCaseAction.caseBoundary.isSupported() && SnakeCaseAction.singleLetters.
 if (TitleCaseAction.titleBoundary.isSupported()) {
 	registerEditorAction(TitleCaseAction);
 }
+
+if (KebabCaseAction.isSupported()) {
+	registerEditorAction(KebabCaseAction);
+}

src/vs/editor/contrib/linesOperations/test/browser/linesOperations.test.ts

@@ -11,7 +11,7 @@ import { Selection } from 'vs/editor/common/core/selection';
 import { Handler } from 'vs/editor/common/editorCommon';
 import { ITextModel } from 'vs/editor/common/model';
 import { ViewModel } from 'vs/editor/common/viewModel/viewModelImpl';
-import { DeleteAllLeftAction, DeleteAllRightAction, DeleteDuplicateLinesAction, DeleteLinesAction, IndentLinesAction, InsertLineAfterAction, InsertLineBeforeAction, JoinLinesAction, LowerCaseAction, SnakeCaseAction, SortLinesAscendingAction, SortLinesDescendingAction, TitleCaseAction, TransposeAction, UpperCaseAction } from 'vs/editor/contrib/linesOperations/browser/linesOperations';
+import { DeleteAllLeftAction, DeleteAllRightAction, DeleteDuplicateLinesAction, DeleteLinesAction, IndentLinesAction, InsertLineAfterAction, InsertLineBeforeAction, JoinLinesAction, KebabCaseAction, LowerCaseAction, SnakeCaseAction, SortLinesAscendingAction, SortLinesDescendingAction, TitleCaseAction, TransposeAction, UpperCaseAction } from 'vs/editor/contrib/linesOperations/browser/linesOperations';
 import { withTestCodeEditor } from 'vs/editor/test/browser/testCodeEditor';
 import { createTextModel } from 'vs/editor/test/common/testTextModel';
 
@@ -814,6 +814,80 @@ suite('Editor Contrib - Line Operations', () => {
 				assertSelection(editor, new Selection(2, 2, 2, 2));
 			}
 		);
+
+		withTestCodeEditor(
+			[
+				'hello world',
+				'öçşğü',
+				'parseHTMLString',
+				'getElementById',
+				'PascalCase',
+				'öçşÖÇŞğüĞÜ',
+				'audioConverter.convertM4AToMP3();',
+				'Capital_Snake_Case',
+				'parseHTML4String',
+				'_accessor: ServicesAccessor',
+				'Kebab-Case',
+			], {}, (editor) => {
+				const model = editor.getModel()!;
+				const kebabCaseAction = new KebabCaseAction();
+
+				editor.setSelection(new Selection(1, 1, 1, 12));
+				executeAction(kebabCaseAction, editor);
+				assert.strictEqual(model.getLineContent(1), 'hello world');
+				assertSelection(editor, new Selection(1, 1, 1, 12));
+
+				editor.setSelection(new Selection(2, 1, 2, 6));
+				executeAction(kebabCaseAction, editor);
+				assert.strictEqual(model.getLineContent(2), 'öçşğü');
+				assertSelection(editor, new Selection(2, 1, 2, 6));
+
+				editor.setSelection(new Selection(3, 1, 3, 16));
+				executeAction(kebabCaseAction, editor);
+				assert.strictEqual(model.getLineContent(3), 'parse-html-string');
+				assertSelection(editor, new Selection(3, 1, 3, 18));
+
+				editor.setSelection(new Selection(4, 1, 4, 15));
+				executeAction(kebabCaseAction, editor);
+				assert.strictEqual(model.getLineContent(4), 'get-element-by-id');
+				assertSelection(editor, new Selection(4, 1, 4, 18));
+
+				editor.setSelection(new Selection(5, 1, 5, 11));
+				executeAction(kebabCaseAction, editor);
+				assert.strictEqual(model.getLineContent(5), 'pascal-case');
+				assertSelection(editor, new Selection(5, 1, 5, 12));
+
+				editor.setSelection(new Selection(6, 1, 6, 11));
+				executeAction(kebabCaseAction, editor);
+				assert.strictEqual(model.getLineContent(6), 'öçş-öç-şğü-ğü');
+				assertSelection(editor, new Selection(6, 1, 6, 14));
+
+				editor.setSelection(new Selection(7, 1, 7, 34));
+				executeAction(kebabCaseAction, editor);
+				assert.strictEqual(model.getLineContent(7), 'audio-converter.convert-m4a-to-mp3();');
+				assertSelection(editor, new Selection(7, 1, 7, 38));
+
+				editor.setSelection(new Selection(8, 1, 8, 19));
+				executeAction(kebabCaseAction, editor);
+				assert.strictEqual(model.getLineContent(8), 'capital-snake-case');
+				assertSelection(editor, new Selection(8, 1, 8, 19));
+
+				editor.setSelection(new Selection(9, 1, 9, 17));
+				executeAction(kebabCaseAction, editor);
+				assert.strictEqual(model.getLineContent(9), 'parse-html4-string');
+				assertSelection(editor, new Selection(9, 1, 9, 19));
+
+				editor.setSelection(new Selection(10, 1, 10, 28));
+				executeAction(kebabCaseAction, editor);
+				assert.strictEqual(model.getLineContent(10), '_accessor: services-accessor');
+				assertSelection(editor, new Selection(10, 1, 10, 29));
+
+				editor.setSelection(new Selection(11, 1, 11, 11));
+				executeAction(kebabCaseAction, editor);
+				assert.strictEqual(model.getLineContent(11), 'kebab-case');
+				assertSelection(editor, new Selection(11, 1, 11, 11));
+			}
+		);
 	});
 
 	suite('DeleteAllRightAction', () => {