| Index: pkg/string_scanner/lib/src/line_scanner.dart
|
| diff --git a/pkg/string_scanner/lib/src/line_scanner.dart b/pkg/string_scanner/lib/src/line_scanner.dart
|
| deleted file mode 100644
|
| index 4e1217305bbf66237df323972cd4cd7c6b6b939a..0000000000000000000000000000000000000000
|
| --- a/pkg/string_scanner/lib/src/line_scanner.dart
|
| +++ /dev/null
|
| @@ -1,108 +0,0 @@
|
| -// Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
|
| -// for details. All rights reserved. Use of this source code is governed by a
|
| -// BSD-style license that can be found in the LICENSE file.
|
| -
|
| -library string_scanner.line_scanner;
|
| -
|
| -import 'string_scanner.dart';
|
| -
|
| -/// A subclass of [StringScanner] that tracks line and column information.
|
| -class LineScanner extends StringScanner {
|
| - /// The scanner's current (zero-based) line number.
|
| - int get line => _line;
|
| - int _line = 0;
|
| -
|
| - /// The scanner's current (zero-based) column number.
|
| - int get column => _column;
|
| - int _column = 0;
|
| -
|
| - /// The scanner's state, including line and column information.
|
| - ///
|
| - /// This can be used to efficiently save and restore the state of the scanner
|
| - /// when backtracking. A given [LineScannerState] is only valid for the
|
| - /// [LineScanner] that created it.
|
| - LineScannerState get state =>
|
| - new LineScannerState._(this, position, line, column);
|
| -
|
| - set state(LineScannerState state) {
|
| - if (!identical(state._scanner, this)) {
|
| - throw new ArgumentError("The given LineScannerState was not returned by "
|
| - "this LineScanner.");
|
| - }
|
| -
|
| - super.position = state.position;
|
| - _line = state.line;
|
| - _column = state.column;
|
| - }
|
| -
|
| - set position(int newPosition) {
|
| - var oldPosition = position;
|
| - super.position = newPosition;
|
| -
|
| - if (newPosition > oldPosition) {
|
| - var newlines = "\n".allMatches(string.substring(oldPosition, newPosition))
|
| - .toList();
|
| - _line += newlines.length;
|
| - if (newlines.isEmpty) {
|
| - _column += newPosition - oldPosition;
|
| - } else {
|
| - _column = newPosition - newlines.last.end;
|
| - }
|
| - } else {
|
| - var newlines = "\n".allMatches(string.substring(newPosition, oldPosition))
|
| - .toList();
|
| - _line -= newlines.length;
|
| - if (newlines.isEmpty) {
|
| - _column -= oldPosition - newPosition;
|
| - } else {
|
| - _column = newPosition - string.lastIndexOf("\n", newPosition) - 1;
|
| - }
|
| - }
|
| - }
|
| -
|
| - LineScanner(String string, {sourceUrl, int position})
|
| - : super(string, sourceUrl: sourceUrl, position: position);
|
| -
|
| - int readChar() {
|
| - var char = super.readChar();
|
| - if (char == 0xA) {
|
| - _line += 1;
|
| - _column = 0;
|
| - } else {
|
| - _column += 1;
|
| - }
|
| - return char;
|
| - }
|
| -
|
| - bool scan(Pattern pattern) {
|
| - var oldPosition = position;
|
| - if (!super.scan(pattern)) return false;
|
| -
|
| - var newlines = "\n".allMatches(lastMatch[0]).toList();
|
| - _line += newlines.length;
|
| - if (newlines.isEmpty) {
|
| - _column += lastMatch[0].length;
|
| - } else {
|
| - _column = lastMatch[0].length - newlines.last.end;
|
| - }
|
| -
|
| - return true;
|
| - }
|
| -}
|
| -
|
| -/// A class representing the state of a [LineScanner].
|
| -class LineScannerState {
|
| - /// The [LineScanner] that created this.
|
| - final LineScanner _scanner;
|
| -
|
| - /// The position of the scanner in this state.
|
| - final int position;
|
| -
|
| - /// The zero-based line number of the scanner in this state.
|
| - final int line;
|
| -
|
| - /// The zero-based column number of the scanner in this state.
|
| - final int column;
|
| -
|
| - LineScannerState._(this._scanner, this.position, this.line, this.column);
|
| -}
|
|
|