markd 0.11.5+1 markd: ^0.11.5+1 copied to clipboard
A fork of dart-lang's markdown
A fork of dart-markdown for easy customization of Markdown syntaxes.
Differences
LinkMapper
introduced to simplify the customization ofLinkSyntax
.InlineParser.be
andBlockParser.be
introduced for using fully customized line syntaxes. They are used in pair if all parsing shares the same set of syntaxes.Inline.defaultSyntaxes
is public and modifiableBlockParser.safeBlockParsers
introduced for not parsing HTML tags at all.Document
's constructor introduced additional arguments,options
,blockParserBuilder
andinlineParserBuilder
for easy customization.- Attribute's names are not sorted
InlineSyntax.match
introduced for easy overriding.InlineSyntax
's constructor introduces the caseSensitive argumentFencedCodeBlockSyntax.getLanguageClass
introduced for generating custom CSS classTableSyntax.processCellContent
introduced for pre-processing cell's content- Allow a link containing parenthesis and quotes
Resources
Customizations
Who Uses
- Quire - a simple, collaborative, multi-level task management tool.
Introduction #
A portable Markdown library written in Dart. It can parse Markdown into HTML on both the client and server.
Play with it at dart-lang.github.io/markdown.
Usage #
import 'package:markd/markdown.dart';
void main() {
print(markdownToHtml('Hello *Markdown*'));
//=> <p>Hello <em>Markdown</em></p>
}
Syntax extensions #
A few Markdown extensions, beyond what was specified in the original
Perl Markdown implementation, are supported. By default, the ones supported
in CommonMark are enabled. Any individual extension can be enabled by
specifying an Array of extension syntaxes in the blockSyntaxes
or
inlineSyntaxes
argument of markdownToHtml
.
The currently supported inline extension syntaxes are:
new InlineHtmlSyntax()
- approximately CommonMark's definition of "Raw HTML".
The currently supported block extension syntaxes are:
const FencedCodeBlockSyntax()
- Code blocks familiar to Pandoc and PHP Markdown Extra users.const HeaderWithIdSyntax()
- ATX-style headers have generated IDs, for link anchors (akin to Pandoc'sauto_identifiers
).const SetextHeaderWithIdSyntax()
- Setext-style headers have generated IDs for link anchors (akin to Pandoc'sauto_identifiers
).const TableSyntax()
- Table syntax familiar to GitHub, PHP Markdown Extra, and Pandoc users.
For example:
import 'package:markd/markdown.dart';
void main() {
print(markdownToHtml('Hello <span class="green">Markdown</span>',
inlineSyntaxes: [new InlineHtmlSyntax()]));
//=> <p>Hello <span class="green">Markdown</span></p>
}
Extension Sets #
To make extension management easy, you can also just specify an extension set.
Both markdownToHtml()
and new Document()
accept an extensionSet
named
parameter. Right now there are two extension sets:
-
ExtensionSet.none
includes no extensions. With no extensions, Markdown documents will be parsed closely to how they might be parsed by the original Perl Markdown implementation. -
ExtensionSet.commonMark
includes two extensions so far, which bring this package's Markdown parsing closer to what is found in the CommonMark spec:new InlineHtmlSyntax()
const FencedCodeBlockSyntax()
-
ExtensionSet.gitHub
includes five extensions:new InlineHtmlSyntax()
const FencedCodeBlockSyntax()
const HeaderWithIdSyntax()
, which addsid
attributes to ATX-style headers, for easy intra-document linking.const SetextHeaderWithIdSyntax()
, which addsid
attributes to Setext-style headers, for easy intra-document linking.const TableSyntax()
Custom syntax extensions #
You can create and use your own syntaxes.
import 'package:markd/markdown.dart';
void main() {
var syntaxes = [new TextSyntax('nyan', sub: '~=[,,_,,]:3')];
print(markdownToHtml('nyan', inlineSyntaxes: syntaxes));
//=> <p>~=[,,_,,]:3</p>
}
### HTML Sanitization
This package offers no features in the way of HTML sanitization. Read Estevão
Soares dos Santos's great article, ["Markdown's XSS Vulnerability (and how to
mitigate it)"], to learn more.
The authors recommend that you perform any necessary sanitization on the
resulting HTML, for example via `dart:html`'s [NodeValidator].
CommonMark compliance #
This package contains a number of files in the tool
directory for tracking
compliance with CommonMark.
Updating CommonMark stats when changing the implementation
- Update the library and test code, making sure that tests still pass.
- Run
dart tool/stats.dart --update-files
to update the per-test resultstool/common_mark_stats.json
and the test summarytool/common_mark_stats.txt
. - Verify that more tests now pass – or at least, no more tests fail.
- Make sure you include the updated stats files in your commit.
Updating the CommonMark test file for a spec update
-
Check out the CommonMark source. Make sure you checkout a major release.
-
Dump the test output overwriting the existing tests file.
/path/to/common_mark_dir> python3 test/spec_tests.py --dump-tests \ > /path/to/markdown.dart/tool/common_mark_tests.json
-
Update the stats files as described above. Note any changes in the results.
-
Update any references to the existing spec by search for
http://spec.commonmark.org/0.27
in the repository. (Including this one.) Verify the updated links are still valid. -
Commit changes, including a corresponding note in
CHANGELOG.md
.