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1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 library source_span.span_mixin; | 5 library source_span.span_mixin; |
6 | 6 |
7 import 'package:path/path.dart' as p; | 7 import 'package:path/path.dart' as p; |
8 | 8 |
9 import 'colors.dart' as colors; | 9 import 'colors.dart' as colors; |
10 import 'span.dart'; | 10 import 'span.dart'; |
11 import 'utils.dart'; | 11 import 'utils.dart'; |
12 | 12 |
13 /// A mixin for easily implementing [SourceSpan]. | 13 /// A mixin for easily implementing [SourceSpan]. |
14 /// | 14 /// |
15 /// This implements the [SourceSpan] methods in terms of [start], [end], and | 15 /// This implements the [SourceSpan] methods in terms of [start], [end], and |
16 /// [text]. This assumes that [start] and [end] have the same source URL, that | 16 /// [text]. This assumes that [start] and [end] have the same source URL, that |
17 /// [start] comes before [end], and that [text] has a number of characters equal | 17 /// [start] comes before [end], and that [text] has a number of characters equal |
18 /// to the distance between [start] and [end]. | 18 /// to the distance between [start] and [end]. |
19 abstract class SourceSpanMixin implements SourceSpan { | 19 abstract class SourceSpanMixin implements SourceSpan { |
20 Uri get sourceUrl => start.sourceUrl; | 20 Uri get sourceUrl => start.sourceUrl; |
21 int get length => end.offset - start.offset; | 21 int get length => end.offset - start.offset; |
22 | 22 |
23 int compareTo(SourceSpan other) { | 23 int compareTo(SourceSpan other) { |
24 int d = start.compareTo(other.start); | 24 var result = start.compareTo(other.start); |
25 return d == 0 ? end.compareTo(other.end) : d; | 25 return result == 0 ? end.compareTo(other.end) : result; |
26 } | 26 } |
27 | 27 |
28 SourceSpan union(SourceSpan other) { | 28 SourceSpan union(SourceSpan other) { |
29 if (sourceUrl != other.sourceUrl) { | 29 if (sourceUrl != other.sourceUrl) { |
30 throw new ArgumentError("Source URLs \"${sourceUrl}\" and " | 30 throw new ArgumentError("Source URLs \"${sourceUrl}\" and " |
31 " \"${other.sourceUrl}\" don't match."); | 31 " \"${other.sourceUrl}\" don't match."); |
32 } | 32 } |
33 | 33 |
34 var start = min(this.start, other.start); | 34 var start = min(this.start, other.start); |
35 var end = max(this.end, other.end); | 35 var end = max(this.end, other.end); |
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58 buffer.write("\n"); | 58 buffer.write("\n"); |
59 var textLine = text.split("\n").first; | 59 var textLine = text.split("\n").first; |
60 if (color != null) buffer.write(color); | 60 if (color != null) buffer.write(color); |
61 buffer.write(textLine); | 61 buffer.write(textLine); |
62 buffer.write("\n"); | 62 buffer.write("\n"); |
63 buffer.write('^' * textLine.length); | 63 buffer.write('^' * textLine.length); |
64 if (color != null) buffer.write(colors.NONE); | 64 if (color != null) buffer.write(colors.NONE); |
65 return buffer.toString(); | 65 return buffer.toString(); |
66 } | 66 } |
67 | 67 |
68 bool operator ==(SourceSpan other) => | 68 bool operator ==(other) => other is SourceSpan && |
69 start == other.start && end == other.end; | 69 start == other.start && end == other.end; |
70 | 70 |
71 int get hashCode => start.hashCode + (31 * end.hashCode); | 71 int get hashCode => start.hashCode + (31 * end.hashCode); |
72 | 72 |
73 String toString() => '<$runtimeType: from $start to $end "$text">'; | 73 String toString() => '<$runtimeType: from $start to $end "$text">'; |
74 } | 74 } |
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