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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, 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 markdown.html_renderer; | 5 library markdown.src.html_renderer; |
6 | 6 |
7 import 'ast.dart'; | 7 import 'ast.dart'; |
8 import 'document.dart'; | 8 import 'document.dart'; |
9 import 'inline_parser.dart'; | 9 import 'inline_parser.dart'; |
10 | 10 |
11 /// Converts the given string of markdown to HTML. | 11 /// Converts the given string of markdown to HTML. |
12 String markdownToHtml(String markdown, {List<InlineSyntax> inlineSyntaxes, | 12 String markdownToHtml(String markdown, |
13 Resolver linkResolver, Resolver imageLinkResolver, | 13 {List<InlineSyntax> inlineSyntaxes, |
| 14 Resolver linkResolver, |
| 15 Resolver imageLinkResolver, |
14 bool inlineOnly: false}) { | 16 bool inlineOnly: false}) { |
15 var document = new Document( | 17 var document = new Document( |
16 inlineSyntaxes: inlineSyntaxes, | 18 inlineSyntaxes: inlineSyntaxes, |
17 imageLinkResolver: imageLinkResolver, | 19 imageLinkResolver: imageLinkResolver, |
18 linkResolver: linkResolver); | 20 linkResolver: linkResolver); |
19 | 21 |
20 if (inlineOnly) { | 22 if (inlineOnly) return renderToHtml(document.parseInline(markdown)); |
21 return renderToHtml(document.parseInline(markdown)); | 23 |
22 } else { | 24 // Replace windows line endings with unix line endings, and split. |
23 // Replace windows line endings with unix line endings, and split. | 25 var lines = markdown.replaceAll('\r\n', '\n').split('\n'); |
24 var lines = markdown.replaceAll('\r\n', '\n').split('\n'); | 26 document.parseRefLinks(lines); |
25 document.parseRefLinks(lines); | 27 |
26 var blocks = document.parseLines(lines); | 28 return renderToHtml(document.parseLines(lines)); |
27 return renderToHtml(blocks); | |
28 } | |
29 } | 29 } |
30 | 30 |
31 String renderToHtml(List<Node> nodes) => new HtmlRenderer().render(nodes); | 31 String renderToHtml(List<Node> nodes) => new HtmlRenderer().render(nodes); |
32 | 32 |
33 /// Translates a parsed AST to HTML. | 33 /// Translates a parsed AST to HTML. |
34 class HtmlRenderer implements NodeVisitor { | 34 class HtmlRenderer implements NodeVisitor { |
35 static final _BLOCK_TAGS = new RegExp( | 35 static final _blockTags = new RegExp('blockquote|h1|h2|h3|h4|h5|h6|hr|p|pre'); |
36 'blockquote|h1|h2|h3|h4|h5|h6|hr|p|pre'); | |
37 | 36 |
38 StringBuffer buffer; | 37 StringBuffer buffer; |
39 | 38 |
40 HtmlRenderer(); | 39 HtmlRenderer(); |
41 | 40 |
42 String render(List<Node> nodes) { | 41 String render(List<Node> nodes) { |
43 buffer = new StringBuffer(); | 42 buffer = new StringBuffer(); |
44 | 43 |
45 for (final node in nodes) node.accept(this); | 44 for (final node in nodes) node.accept(this); |
46 | 45 |
47 return buffer.toString(); | 46 return buffer.toString(); |
48 } | 47 } |
49 | 48 |
50 void visitText(Text text) { | 49 void visitText(Text text) { |
51 buffer.write(text.text); | 50 buffer.write(text.text); |
52 } | 51 } |
53 | 52 |
54 bool visitElementBefore(Element element) { | 53 bool visitElementBefore(Element element) { |
55 // Hackish. Separate block-level elements with newlines. | 54 // Hackish. Separate block-level elements with newlines. |
56 if (!buffer.isEmpty && _BLOCK_TAGS.firstMatch(element.tag) != null) { | 55 if (!buffer.isEmpty && _blockTags.firstMatch(element.tag) != null) { |
57 buffer.write('\n'); | 56 buffer.write('\n'); |
58 } | 57 } |
59 | 58 |
60 buffer.write('<${element.tag}'); | 59 buffer.write('<${element.tag}'); |
61 | 60 |
62 // Sort the keys so that we generate stable output. | 61 // Sort the keys so that we generate stable output. |
63 final attributeNames = element.attributes.keys.toList(); | 62 var attributeNames = element.attributes.keys.toList(); |
64 attributeNames.sort((a, b) => a.compareTo(b)); | 63 attributeNames.sort((a, b) => a.compareTo(b)); |
65 for (final name in attributeNames) { | 64 |
| 65 for (var name in attributeNames) { |
66 buffer.write(' $name="${element.attributes[name]}"'); | 66 buffer.write(' $name="${element.attributes[name]}"'); |
67 } | 67 } |
68 | 68 |
69 if (element.isEmpty) { | 69 if (element.isEmpty) { |
70 // Empty element like <hr/>. | 70 // Empty element like <hr/>. |
71 buffer.write(' />'); | 71 buffer.write(' />'); |
72 return false; | 72 return false; |
73 } else { | 73 } else { |
74 buffer.write('>'); | 74 buffer.write('>'); |
75 return true; | 75 return true; |
76 } | 76 } |
77 } | 77 } |
78 | 78 |
79 void visitElementAfter(Element element) { | 79 void visitElementAfter(Element element) { |
80 buffer.write('</${element.tag}>'); | 80 buffer.write('</${element.tag}>'); |
81 } | 81 } |
82 } | 82 } |
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