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Side by Side Diff: packages/source_span/lib/src/span_mixin.dart

Issue 2989763002: Update charted to 0.4.8 and roll (Closed)
Patch Set: Removed Cutch from list of reviewers Created 3 years, 4 months ago
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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 import 'dart:math' as math;
6 6
7 import 'dart:math' as math; 7 import 'package:charcode/charcode.dart';
8 import 'package:path/path.dart' as p; 8 import 'package:path/path.dart' as p;
9 9
10 import 'colors.dart' as colors; 10 import 'colors.dart' as colors;
11 import 'span.dart'; 11 import 'span.dart';
12 import 'span_with_context.dart'; 12 import 'span_with_context.dart';
13 import 'utils.dart'; 13 import 'utils.dart';
14 14
15 /// A mixin for easily implementing [SourceSpan]. 15 /// A mixin for easily implementing [SourceSpan].
16 /// 16 ///
17 /// This implements the [SourceSpan] methods in terms of [start], [end], and 17 /// This implements the [SourceSpan] methods in terms of [start], [end], and
(...skipping 23 matching lines...) Expand all
41 if (beginSpan.end.compareTo(endSpan.start) < 0) { 41 if (beginSpan.end.compareTo(endSpan.start) < 0) {
42 throw new ArgumentError("Spans $this and $other are disjoint."); 42 throw new ArgumentError("Spans $this and $other are disjoint.");
43 } 43 }
44 44
45 var text = beginSpan.text + 45 var text = beginSpan.text +
46 endSpan.text.substring(beginSpan.end.distance(endSpan.start)); 46 endSpan.text.substring(beginSpan.end.distance(endSpan.start));
47 return new SourceSpan(start, end, text); 47 return new SourceSpan(start, end, text);
48 } 48 }
49 49
50 String message(String message, {color}) { 50 String message(String message, {color}) {
51 var buffer = new StringBuffer();
52 buffer.write('line ${start.line + 1}, column ${start.column + 1}');
53 if (sourceUrl != null) buffer.write(' of ${p.prettyUri(sourceUrl)}');
54 buffer.write(': $message');
55
56 var highlight = this.highlight(color: color);
57 if (!highlight.isEmpty) {
58 buffer.writeln();
59 buffer.write(highlight);
60 }
61
62 return buffer.toString();
63 }
64
65 String highlight({color}) {
51 if (color == true) color = colors.RED; 66 if (color == true) color = colors.RED;
52 if (color == false) color = null; 67 if (color == false) color = null;
53 68
54 var line = start.line;
55 var column = start.column; 69 var column = start.column;
56
57 var buffer = new StringBuffer(); 70 var buffer = new StringBuffer();
58 buffer.write('line ${line + 1}, column ${column + 1}'); 71 String textLine;
59 if (sourceUrl != null) buffer.write(' of ${p.prettyUri(sourceUrl)}');
60 buffer.write(': $message');
61
62 if (length == 0 && this is! SourceSpanWithContext) return buffer.toString();
63 buffer.write("\n");
64
65 var textLine;
66 if (this is SourceSpanWithContext) { 72 if (this is SourceSpanWithContext) {
67 var context = (this as SourceSpanWithContext).context; 73 var context = (this as SourceSpanWithContext).context;
68 var lineStart = findLineStart(context, text, column); 74 var lineStart = findLineStart(context, text, column);
69 if (lineStart != null && lineStart > 0) { 75 if (lineStart != null && lineStart > 0) {
70 buffer.write(context.substring(0, lineStart)); 76 buffer.write(context.substring(0, lineStart));
71 context = context.substring(lineStart); 77 context = context.substring(lineStart);
72 } 78 }
73 var endIndex = context.indexOf('\n'); 79 var endIndex = context.indexOf('\n');
74 textLine = endIndex == -1 ? context : context.substring(0, endIndex + 1); 80 textLine = endIndex == -1 ? context : context.substring(0, endIndex + 1);
75 column = math.min(column, textLine.length - 1); 81 column = math.min(column, textLine.length);
82 } else if (length == 0) {
83 return "";
76 } else { 84 } else {
77 textLine = text.split("\n").first; 85 textLine = text.split("\n").first;
78 column = 0; 86 column = 0;
79 } 87 }
80 88
81 var toColumn = 89 var toColumn =
82 math.min(column + end.offset - start.offset, textLine.length); 90 math.min(column + end.offset - start.offset, textLine.length);
83 if (color != null) { 91 if (color != null) {
84 buffer.write(textLine.substring(0, column)); 92 buffer.write(textLine.substring(0, column));
85 buffer.write(color); 93 buffer.write(color);
86 buffer.write(textLine.substring(column, toColumn)); 94 buffer.write(textLine.substring(column, toColumn));
87 buffer.write(colors.NONE); 95 buffer.write(colors.NONE);
88 buffer.write(textLine.substring(toColumn)); 96 buffer.write(textLine.substring(toColumn));
89 } else { 97 } else {
90 buffer.write(textLine); 98 buffer.write(textLine);
91 } 99 }
92 if (!textLine.endsWith('\n')) buffer.write('\n'); 100 if (!textLine.endsWith('\n')) buffer.write('\n');
93 buffer.write(' ' * column); 101
102 for (var i = 0; i < column; i++) {
103 if (textLine.codeUnitAt(i) == $tab) {
104 buffer.writeCharCode($tab);
105 } else {
106 buffer.writeCharCode($space);
107 }
108 }
109
94 if (color != null) buffer.write(color); 110 if (color != null) buffer.write(color);
95 buffer.write('^' * math.max(toColumn - column, 1)); 111 buffer.write('^' * math.max(toColumn - column, 1));
96 if (color != null) buffer.write(colors.NONE); 112 if (color != null) buffer.write(colors.NONE);
97 return buffer.toString(); 113 return buffer.toString();
98 } 114 }
99 115
100 bool operator ==(other) => other is SourceSpan && 116 bool operator ==(other) => other is SourceSpan &&
101 start == other.start && end == other.end; 117 start == other.start && end == other.end;
102 118
103 int get hashCode => start.hashCode + (31 * end.hashCode); 119 int get hashCode => start.hashCode + (31 * end.hashCode);
104 120
105 String toString() => '<$runtimeType: from $start to $end "$text">'; 121 String toString() => '<$runtimeType: from $start to $end "$text">';
106 } 122 }
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