| // Copyright (c) 2012, 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. |
| |
| // Patch file for dart:coreimpl classes. |
| |
| // Patch for RegExp implementation. |
| // TODO(ager): Split out into regexp_patch.dart and allow #source in |
| // patch files? |
| patch class JSSyntaxRegExp { |
| final String _pattern; |
| final bool _multiLine; |
| final bool _ignoreCase; |
| |
| patch const JSSyntaxRegExp(String pattern, |
| {bool multiLine: false, |
| bool ignoreCase: false}) |
| : _pattern = pattern, |
| _multiLine = multiLine, |
| _ignoreCase = ignoreCase; |
| |
| patch Match firstMatch(String str) { |
| List<String> m = regExpExec(this, checkString(str)); |
| if (m == null) return null; |
| var matchStart = regExpMatchStart(m); |
| // m.lastIndex only works with flag 'g'. |
| var matchEnd = matchStart + m[0].length; |
| return new _MatchImplementation(pattern, str, matchStart, matchEnd, m); |
| } |
| |
| patch bool hasMatch(String str) => regExpTest(this, checkString(str)); |
| |
| patch String stringMatch(String str) { |
| var match = firstMatch(str); |
| return match == null ? null : match.group(0); |
| } |
| |
| patch Iterable<Match> allMatches(String str) { |
| checkString(str); |
| return new _AllMatchesIterable(this, str); |
| } |
| |
| patch String get pattern => _pattern; |
| patch bool get multiLine => _multiLine; |
| patch bool get ignoreCase => _ignoreCase; |
| |
| static JSSyntaxRegExp _globalVersionOf(JSSyntaxRegExp other) { |
| JSSyntaxRegExp re = new JSSyntaxRegExp(other.pattern, |
| multiLine: other.multiLine, |
| ignoreCase: other.ignoreCase); |
| regExpAttachGlobalNative(re); |
| return re; |
| } |
| |
| _getNative() => regExpGetNative(this); |
| } |
| |
| class _MatchImplementation implements Match { |
| final String pattern; |
| final String str; |
| final int start; |
| final int end; |
| final List<String> _groups; |
| |
| const _MatchImplementation( |
| String this.pattern, |
| String this.str, |
| int this.start, |
| int this.end, |
| List<String> this._groups); |
| |
| String group(int index) => _groups[index]; |
| String operator [](int index) => group(index); |
| int get groupCount => _groups.length - 1; |
| |
| List<String> groups(List<int> groups) { |
| List<String> out = []; |
| for (int i in groups) { |
| out.add(group(i)); |
| } |
| return out; |
| } |
| } |
| |
| class _AllMatchesIterable implements Iterable<Match> { |
| final JSSyntaxRegExp _re; |
| final String _str; |
| |
| const _AllMatchesIterable(this._re, this._str); |
| |
| Iterator<Match> iterator() => new _AllMatchesIterator(_re, _str); |
| } |
| |
| class _AllMatchesIterator implements Iterator<Match> { |
| final RegExp _re; |
| final String _str; |
| Match _next; |
| bool _done; |
| |
| _AllMatchesIterator(JSSyntaxRegExp re, String this._str) |
| : _done = false, _re = JSSyntaxRegExp._globalVersionOf(re); |
| |
| Match next() { |
| if (!hasNext) { |
| throw new StateError("No more elements"); |
| } |
| |
| // _next is set by [hasNext]. |
| var next = _next; |
| _next = null; |
| return next; |
| } |
| |
| bool get hasNext { |
| if (_done) { |
| return false; |
| } else if (_next != null) { |
| return true; |
| } |
| |
| // firstMatch actually acts as nextMatch because of |
| // hidden global flag. |
| _next = _re.firstMatch(_str); |
| if (_next == null) { |
| _done = true; |
| return false; |
| } else { |
| return true; |
| } |
| } |
| } |