TypeScript Range.isEmpty方法代码示例

	public static deleteRight(config: CursorConfiguration, model: ICursorSimpleModel, cursor: SingleCursorState): EditOperationResult {

		let deleteSelection: Range = cursor.selection;

		if (deleteSelection.isEmpty()) {
			let position = cursor.position;
			let rightOfPosition = MoveOperations.right(config, model, position.lineNumber, position.column);
			deleteSelection = new Range(
				rightOfPosition.lineNumber,
				rightOfPosition.column,
				position.lineNumber,
				position.column
			);
		}

		if (deleteSelection.isEmpty()) {
			// Probably at end of file => ignore
			return null;
		}

		let shouldPushStackElementBefore = false;
		if (deleteSelection.startLineNumber !== deleteSelection.endLineNumber) {
			shouldPushStackElementBefore = true;
		}

		return new EditOperationResult(new ReplaceCommand(deleteSelection, ''), {
			shouldPushStackElementBefore: shouldPushStackElementBefore,
			shouldPushStackElementAfter: false
		});
	}

	public static deleteRight(prevEditOperationType: EditOperationType, config: CursorConfiguration, model: ICursorSimpleModel, selections: Selection[]): [boolean, ICommand[]] {
		let commands: ICommand[] = [];
		let shouldPushStackElementBefore = (prevEditOperationType !== EditOperationType.DeletingRight);
		for (let i = 0, len = selections.length; i < len; i++) {
			const selection = selections[i];

			let deleteSelection: Range = selection;

			if (deleteSelection.isEmpty()) {
				let position = selection.getPosition();
				let rightOfPosition = MoveOperations.right(config, model, position.lineNumber, position.column);
				deleteSelection = new Range(
					rightOfPosition.lineNumber,
					rightOfPosition.column,
					position.lineNumber,
					position.column
				);
			}

			if (deleteSelection.isEmpty()) {
				// Probably at end of file => ignore
				commands[i] = null;
				continue;
			}

			if (deleteSelection.startLineNumber !== deleteSelection.endLineNumber) {
				shouldPushStackElementBefore = true;
			}

			commands[i] = new ReplaceCommand(deleteSelection, '');
		}
		return [shouldPushStackElementBefore, commands];
	}

	public static deleteLeft(prevEditOperationType: EditOperationType, config: CursorConfiguration, model: ICursorSimpleModel, selections: Selection[]): [boolean, ICommand[]] {

		if (this._isAutoClosingPairDelete(config, model, selections)) {
			return this._runAutoClosingPairDelete(config, model, selections);
		}

		let commands: ICommand[] = [];
		let shouldPushStackElementBefore = (prevEditOperationType !== EditOperationType.DeletingLeft);
		for (let i = 0, len = selections.length; i < len; i++) {
			const selection = selections[i];

			let deleteSelection: Range = selection;

			if (deleteSelection.isEmpty()) {
				let position = selection.getPosition();

				if (config.useTabStops && position.column > 1) {
					let lineContent = model.getLineContent(position.lineNumber);

					let firstNonWhitespaceIndex = strings.firstNonWhitespaceIndex(lineContent);
					let lastIndentationColumn = (
						firstNonWhitespaceIndex === -1
							? /* entire string is whitespace */lineContent.length + 1
							: firstNonWhitespaceIndex + 1
					);

					if (position.column <= lastIndentationColumn) {
						let fromVisibleColumn = CursorColumns.visibleColumnFromColumn2(config, model, position);
						let toVisibleColumn = CursorColumns.prevTabStop(fromVisibleColumn, config.tabSize);
						let toColumn = CursorColumns.columnFromVisibleColumn2(config, model, position.lineNumber, toVisibleColumn);
						deleteSelection = new Range(position.lineNumber, toColumn, position.lineNumber, position.column);
					} else {
						deleteSelection = new Range(position.lineNumber, position.column - 1, position.lineNumber, position.column);
					}
				} else {
					let leftOfPosition = MoveOperations.left(config, model, position.lineNumber, position.column);
					deleteSelection = new Range(
						leftOfPosition.lineNumber,
						leftOfPosition.column,
						position.lineNumber,
						position.column
					);
				}
			}

			if (deleteSelection.isEmpty()) {
				// Probably at beginning of file => ignore
				commands[i] = null;
				continue;
			}

			if (deleteSelection.startLineNumber !== deleteSelection.endLineNumber) {
				shouldPushStackElementBefore = true;
			}

			commands[i] = new ReplaceCommand(deleteSelection, '');
		}
		return [shouldPushStackElementBefore, commands];
	}

	public static deleteLeft(config: CursorConfiguration, model: ICursorSimpleModel, cursor: SingleCursorState): EditOperationResult {
		let r = this.autoClosingPairDelete(config, model, cursor);
		if (r) {
			// This was a case for an auto-closing pair delete
			return r;
		}

		let deleteSelection: Range = cursor.selection;

		if (deleteSelection.isEmpty()) {
			let position = cursor.position;

			if (config.useTabStops && position.column > 1) {
				let lineContent = model.getLineContent(position.lineNumber);

				let firstNonWhitespaceIndex = strings.firstNonWhitespaceIndex(lineContent);
				let lastIndentationColumn = (
					firstNonWhitespaceIndex === -1
						? /* entire string is whitespace */lineContent.length + 1
						: firstNonWhitespaceIndex + 1
				);

				if (position.column <= lastIndentationColumn) {
					let fromVisibleColumn = CursorColumns.visibleColumnFromColumn2(config, model, position);
					let toVisibleColumn = CursorColumns.prevTabStop(fromVisibleColumn, config.tabSize);
					let toColumn = CursorColumns.columnFromVisibleColumn2(config, model, position.lineNumber, toVisibleColumn);
					deleteSelection = new Range(position.lineNumber, toColumn, position.lineNumber, position.column);
				} else {
					deleteSelection = new Range(position.lineNumber, position.column - 1, position.lineNumber, position.column);
				}
			} else {
				let leftOfPosition = MoveOperations.left(config, model, position.lineNumber, position.column);
				deleteSelection = new Range(
					leftOfPosition.lineNumber,
					leftOfPosition.column,
					position.lineNumber,
					position.column
				);
			}
		}

		if (deleteSelection.isEmpty()) {
			// Probably at beginning of file => ignore
			return null;
		}

		let shouldPushStackElementBefore = false;
		if (deleteSelection.startLineNumber !== deleteSelection.endLineNumber) {
			shouldPushStackElementBefore = true;
		}

		return new EditOperationResult(new ReplaceCommand(deleteSelection, ''), {
			shouldPushStackElementBefore: shouldPushStackElementBefore,
			shouldPushStackElementAfter: false
		});
	}

	private static _computeSelection(selectionStart: Range, position: Position): Selection {
		let startLineNumber: number, startColumn: number, endLineNumber: number, endColumn: number;
		if (selectionStart.isEmpty()) {
			startLineNumber = selectionStart.startLineNumber;
			startColumn = selectionStart.startColumn;
			endLineNumber = position.lineNumber;
			endColumn = position.column;
		} else {
			if (position.isBeforeOrEqual(selectionStart.getStartPosition())) {
				startLineNumber = selectionStart.endLineNumber;
				startColumn = selectionStart.endColumn;
				endLineNumber = position.lineNumber;
				endColumn = position.column;
			} else {
				startLineNumber = selectionStart.startLineNumber;
				startColumn = selectionStart.startColumn;
				endLineNumber = position.lineNumber;
				endColumn = position.column;
			}
		}
		return new Selection(
			startLineNumber,
			startColumn,
			endLineNumber,
			endColumn
		);
	}

	public static deleteAllRight(config: CursorConfiguration, model: ICursorSimpleModel, cursor: SingleCursorState): EditOperationResult {
		let selection = cursor.selection;

		if (selection.isEmpty()) {
			let position = cursor.position;
			let lineNumber = position.lineNumber;
			let column = position.column;
			let maxColumn = model.getLineMaxColumn(lineNumber);

			if (column === maxColumn) {
				// Ignore deleting at end of file
				return null;
			}

			let deleteSelection = new Range(lineNumber, column, lineNumber, maxColumn);
			if (!deleteSelection.isEmpty()) {
				return new EditOperationResult(new ReplaceCommand(deleteSelection, ''), {
					shouldPushStackElementBefore: false,
					shouldPushStackElementAfter: false
				});
			}
		}

		return this.deleteRight(config, model, cursor);
	}

	public static deleteAllLeft(config: CursorConfiguration, model: ICursorSimpleModel, cursor: SingleCursorState): EditOperationResult {
		let r = this.autoClosingPairDelete(config, model, cursor);
		if (r) {
			// This was a case for an auto-closing pair delete
			return r;
		}

		let selection = cursor.selection;

		if (selection.isEmpty()) {
			let position = cursor.position;
			let lineNumber = position.lineNumber;
			let column = position.column;

			if (column === 1) {
				// Ignore deleting at beginning of line
				return null;
			}

			let deleteSelection = new Range(lineNumber, 1, lineNumber, column);
			if (!deleteSelection.isEmpty()) {
				return new EditOperationResult(new ReplaceCommand(deleteSelection, ''), {
					shouldPushStackElementBefore: false,
					shouldPushStackElementAfter: false
				});
			}
		}

		return this.deleteLeft(config, model, cursor);
	}

	private _createOperationsForBlockComment(selection:EditorCommon.IRange, config:Modes.ICommentsConfiguration, model:EditorCommon.ITokenizedModel, builder:EditorCommon.IEditOperationBuilder): void {
		var startLineNumber = selection.startLineNumber;
		var startColumn = selection.startColumn;
		var endLineNumber = selection.endLineNumber;
		var endColumn = selection.endColumn;
		var selectionIsEmpty = Range.isEmpty(selection);

		var startToken = config.blockCommentStartToken;
		var endToken = config.blockCommentEndToken;

		var startTokenIndex = model.getLineContent(startLineNumber).lastIndexOf(startToken, startColumn - 1 + startToken.length);
		var endTokenIndex = model.getLineContent(endLineNumber).indexOf(endToken, endColumn - 1 - endToken.length);

		var ops: EditorCommon.IIdentifiedSingleEditOperation[];

		if (startTokenIndex !== -1 && endTokenIndex !== -1) {
			ops = BlockCommentCommand._createRemoveBlockCommentOperations({
				startLineNumber: startLineNumber,
				startColumn: startTokenIndex + 1 + startToken.length,
				endLineNumber: endLineNumber,
				endColumn: endTokenIndex + 1
			}, startToken, endToken);
		} else {
			ops = BlockCommentCommand._createAddBlockCommentOperations(selection, startToken, endToken);
			this._usedEndToken = ops.length === 1 ? endToken : null;
		}

		for (var i = 0; i < ops.length; i++) {
			builder.addEditOperation(ops[i].range, ops[i].text);
		}
	}

	public static _createRemoveBlockCommentOperations(r: editorCommon.IRange, startToken: string, endToken: string): editorCommon.IIdentifiedSingleEditOperation[] {
		var res: editorCommon.IIdentifiedSingleEditOperation[] = [];

		if (!Range.isEmpty(r)) {
			// Remove block comment start
			res.push(EditOperation.delete(new Range(
				r.startLineNumber, r.startColumn - startToken.length,
				r.startLineNumber, r.startColumn
			)));

			// Remove block comment end
			res.push(EditOperation.delete(new Range(
				r.endLineNumber, r.endColumn,
				r.endLineNumber, r.endColumn + endToken.length
			)));
		} else {
			// Remove both continuously
			res.push(EditOperation.delete(new Range(
				r.startLineNumber, r.startColumn - startToken.length,
				r.endLineNumber, r.endColumn + endToken.length
			)));
		}

		return res;
	}

	test('swap start and stop', () => {
		var s = new Range(2, 1, 1, 2);
		assert.equal(s.startLineNumber, 1);
		assert.equal(s.startColumn, 2);
		assert.equal(s.endLineNumber, 2);
		assert.equal(s.endColumn, 1);
		assert.equal(s.isEmpty(), false);
	});