pkg/docgen: update markdown to 0.5.1

third_party/pkg/markdown/lib/markdown.dart

Index: third_party/pkg/markdown/lib/markdown.dart
diff --git a/third_party/pkg/markdown/lib/markdown.dart b/third_party/pkg/markdown/lib/markdown.dart
index 01de970769cb40b9207ad92615fbb42c3a7e0cc7..f1274504eb1bf42de95d99f94f12ba3421b3200e 100644
--- a/third_party/pkg/markdown/lib/markdown.dart
+++ b/third_party/pkg/markdown/lib/markdown.dart
@@ -5,111 +5,8 @@
 /// Parses text in a markdown-like format and renders to HTML.
 library markdown;
 
-// TODO(rnystrom): Use "package:" URL (#4968).
-part 'src/markdown/ast.dart';
-part 'src/markdown/block_parser.dart';
-part 'src/markdown/html_renderer.dart';
-part 'src/markdown/inline_parser.dart';
-
-typedef Node Resolver(String name);
-
-/// Converts the given string of markdown to HTML.
-String markdownToHtml(String markdown, {inlineSyntaxes, linkResolver}) {
-  final document = new Document(inlineSyntaxes: inlineSyntaxes,
-      linkResolver: linkResolver);
-
-  // Replace windows line endings with unix line endings, and split.
-  final lines = markdown.replaceAll('\r\n','\n').split('\n');
-  document.parseRefLinks(lines);
-  final blocks = document.parseLines(lines);
-  return renderToHtml(blocks);
-}
-
-/// Replaces `<`, `&`, and `>`, with their HTML entity equivalents.
-String escapeHtml(String html) {
-  return html.replaceAll('&', '&amp;')
-             .replaceAll('<', '&lt;')
-             .replaceAll('>', '&gt;');
-}
-
-/// Maintains the context needed to parse a markdown document.
-class Document {
-  final Map<String, Link> refLinks;
-  List<InlineSyntax> inlineSyntaxes;
-  Resolver linkResolver;
-
-  Document({this.inlineSyntaxes, this.linkResolver})
-    : refLinks = <String, Link>{};
-
-  parseRefLinks(List<String> lines) {
-    // This is a hideous regex. It matches:
-    // [id]: http:foo.com "some title"
-    // Where there may whitespace in there, and where the title may be in
-    // single quotes, double quotes, or parentheses.
-    final indent = r'^[ ]{0,3}'; // Leading indentation.
-    final id = r'\[([^\]]+)\]';  // Reference id in [brackets].
-    final quote = r'"[^"]+"';    // Title in "double quotes".
-    final apos = r"'[^']+'";     // Title in 'single quotes'.
-    final paren = r"\([^)]+\)";  // Title in (parentheses).
-    final pattern = new RegExp(
-        '$indent$id:\\s+(\\S+)\\s*($quote|$apos|$paren|)\\s*\$');
-
-    for (int i = 0; i < lines.length; i++) {
-      final match = pattern.firstMatch(lines[i]);
-      if (match != null) {
-        // Parse the link.
-        var id = match[1];
-        var url = match[2];
-        var title = match[3];
-
-        if (title == '') {
-          // No title.
-          title = null;
-        } else {
-          // Remove "", '', or ().
-          title = title.substring(1, title.length - 1);
-        }
-
-        // References are case-insensitive.
-        id = id.toLowerCase();
-
-        refLinks[id] = new Link(id, url, title);
-
-        // Remove it from the output. We replace it with a blank line which will
-        // get consumed by later processing.
-        lines[i] = '';
-      }
-    }
-  }
-
-  /// Parse the given [lines] of markdown to a series of AST nodes.
-  List<Node> parseLines(List<String> lines) {
-    final parser = new BlockParser(lines, this);
-
-    final blocks = [];
-    while (!parser.isDone) {
-      for (final syntax in BlockSyntax.syntaxes) {
-        if (syntax.canParse(parser)) {
-          final block = syntax.parse(parser);
-          if (block != null) blocks.add(block);
-          break;
-        }
-      }
-    }
-
-    return blocks;
-  }
-
-  /// Takes a string of raw text and processes all inline markdown tags,
-  /// returning a list of AST nodes. For example, given ``"*this **is** a*
-  /// `markdown`"``, returns:
-  /// `<em>this <strong>is</strong> a</em> <code>markdown</code>`.
-  List<Node> parseInline(String text) => new InlineParser(text, this).parse();
-}
-
-class Link {
-  final String id;
-  final String url;
-  final String title;
-  Link(this.id, this.url, this.title);
-}
+export 'src/ast.dart';
+export 'src/block_parser.dart';
+export 'src/document.dart';
+export 'src/html_renderer.dart';
+export 'src/inline_parser.dart';