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1 // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2015, 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 /// Helper for debug JS nodes. | 5 /// Helper for debug JS nodes. |
6 | 6 |
7 library js.debug; | 7 library js.debug; |
8 | 8 |
9 import 'package:js_ast/js_ast.dart'; | 9 import 'package:js_ast/js_ast.dart'; |
10 | 10 |
11 import '../io/code_output.dart' show | 11 import '../io/code_output.dart' show BufferedCodeOutput; |
12 BufferedCodeOutput; | 12 import '../util/util.dart' show Indentation, Tagging; |
13 import '../util/util.dart' show | |
14 Indentation, | |
15 Tagging; | |
16 | 13 |
17 /// Unparse the JavaScript [node]. | 14 /// Unparse the JavaScript [node]. |
18 String nodeToString(Node node) { | 15 String nodeToString(Node node) { |
19 JavaScriptPrintingOptions options = new JavaScriptPrintingOptions( | 16 JavaScriptPrintingOptions options = new JavaScriptPrintingOptions( |
20 shouldCompressOutput: true, | 17 shouldCompressOutput: true, |
21 preferSemicolonToNewlineInMinifiedOutput: true); | 18 preferSemicolonToNewlineInMinifiedOutput: true); |
22 LenientPrintingContext printingContext = | 19 LenientPrintingContext printingContext = new LenientPrintingContext(); |
23 new LenientPrintingContext(); | |
24 new Printer(options, printingContext).visit(node); | 20 new Printer(options, printingContext).visit(node); |
25 return printingContext.getText(); | 21 return printingContext.getText(); |
26 } | 22 } |
27 | 23 |
28 /// Visitor that creates an XML-like representation of the structure of a | 24 /// Visitor that creates an XML-like representation of the structure of a |
29 /// JavaScript [Node]. | 25 /// JavaScript [Node]. |
30 class DebugPrinter extends BaseVisitor with Indentation, Tagging<Node> { | 26 class DebugPrinter extends BaseVisitor with Indentation, Tagging<Node> { |
31 StringBuffer sb = new StringBuffer(); | 27 StringBuffer sb = new StringBuffer(); |
32 | 28 |
33 void visitNodeWithChildren(Node node, String type, [Map params]) { | 29 void visitNodeWithChildren(Node node, String type, [Map params]) { |
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67 } | 63 } |
68 | 64 |
69 /// Simple printing context that doesn't throw on errors. | 65 /// Simple printing context that doesn't throw on errors. |
70 class LenientPrintingContext extends SimpleJavaScriptPrintingContext | 66 class LenientPrintingContext extends SimpleJavaScriptPrintingContext |
71 implements BufferedCodeOutput { | 67 implements BufferedCodeOutput { |
72 @override | 68 @override |
73 void error(String message) { | 69 void error(String message) { |
74 buffer.write('>>$message<<'); | 70 buffer.write('>>$message<<'); |
75 } | 71 } |
76 } | 72 } |
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