Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

add support for nested lists #111

Open
wants to merge 1 commit into
base: main
Choose a base branch
from
Open

add support for nested lists #111

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
51 changes: 39 additions & 12 deletions src/index.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -8,11 +8,12 @@ const TAGS = {
'-': ['<hr />']
};

/** Outdent a string based on the first indented line's leading whitespace
/** Outdent a string based on a selected replacement, defaulting to the first indented line's leading whitespace
* @private
*/
function outdent(str) {
return str.replace(RegExp('^'+(str.match(/^(\t| )+/) || '')[0], 'gm'), '');
function outdent(str, replacement) {
replacement = replacement || str.match(/^(\t| )*/)[0] || '';
return str.replace(RegExp('^'+(replacement), 'gm'), '');
}

/** Encode special attribute characters to HTML entities in a String.
Expand All @@ -24,7 +25,7 @@ function encodeAttr(str) {

/** Parse Markdown into an HTML String. */
export default function parse(md, prevLinks) {
let tokenizer = /((?:^|\n+)(?:\n---+|\* \*(?: \*)+)\n)|(?:^``` *(\w*)\n([\s\S]*?)\n```$)|((?:(?:^|\n+)(?:\t| {2,}).+)+\n*)|((?:(?:^|\n)([>*+-]|\d+\.)\s+.*)+)|(?:!\[([^\]]*?)\]\(([^)]+?)\))|(\[)|(\](?:\(([^)]+?)\))?)|(?:(?:^|\n+)([^\s].*)\n(-{3,}|={3,})(?:\n+|$))|(?:(?:^|\n+)(#{1,6})\s*(.+)(?:\n+|$))|(?:`([^`].*?)`)|( \n\n*|\n{2,}|__|\*\*|[_*]|~~)/gm,
let tokenizer = /((?:^|\n+)(?:\n---+|\* \*(?: \*)+)\n)|(?:^``` *(\w*)\n([\s\S]*?)\n```$)|((?:(?:^|\n+)(?:\t| {2,}).+)+\n*)|((?:(?:^|\n\s*)([*+-]|\d+\.)\s+.*)+)|(?:!\[([^\]]*?)\]\(([^)]+?)\))|(\[)|(\](?:\(([^)]+?)\))?)|(?:(?:^|\n+)([^\s].*)\n(-{3,}|={3,})(?:\n+|$))|(?:(?:^|\n+)(#{1,6})\s*(.+)(?:\n+|$))|(?:`([^`].*?)`)|( \n\n*|\n{2,}|__|\*\*|[_*]|~~)|((?:(?:^|\n)(?:>\s+[^\n]*\n?)+))/gm,
context = [],
out = '',
links = prevLinks || {},
Expand Down Expand Up @@ -63,18 +64,39 @@ export default function parse(md, prevLinks) {
else if (t = (token[3] || token[4])) {
chunk = '<pre class="code '+(token[4]?'poetry':token[2].toLowerCase())+'"><code'+(token[2] ? ` class="language-${token[2].toLowerCase()}"` : '')+'>'+outdent(encodeAttr(t).replace(/^\n+|\n+$/g, ''))+'</code></pre>';
}
// > Quotes, -* lists:
// -* lists:
else if (t = token[6]) {
if (t.match(/\./)) {
token[5] = token[5].replace(/^\d+/gm, '');
}
inner = parse(outdent(token[5].replace(/^\s*[>*+.-]/gm, '')));
if (t=='>') t = 'blockquote';
else {
t = t.match(/\./) ? 'ol' : 'ul';
inner = inner.replace(/^(.*)(\n|$)/gm, '<li>$1</li>');
}
chunk = '<'+t+'>' + inner + '</'+t+'>';
t = t.match(/\./) ? 'ol' : 'ul';
chunk = '<'+t+'><li>';
let firstIndent = '';
let currentSublist = '';
let firstItemCreated = false;

token[5].replace(/^(\s*)(?:[*+.-]|\d+\.)\s+(.*)\n?/gm, (match, indent, content) => {
if (indent) {
if (!firstIndent) {
firstIndent = indent;
}
currentSublist += match;
}
else {
let parsedSublist = '';
if (currentSublist) {
parsedSublist = parse(outdent(currentSublist, firstIndent));
}
if (firstItemCreated) {
chunk += parsedSublist + '</li><li>';
}
chunk += parse(content);
firstItemCreated = true;

firstIndent = currentSublist = '';
}
});
chunk += '</li></'+t+'>';
}
// Images:
else if (token[8]) {
Expand All @@ -101,6 +123,11 @@ export default function parse(md, prevLinks) {
else if (token[17] || token[1]) {
chunk = tag(token[17] || '--');
}
// > Quotes
else if (token[18]) {
inner = parse(outdent(token[18].replace(/^\s*>/gm, '')));
chunk = '<blockquote>' + inner + '</blockquote>';
}
out += prev;
out += chunk;
}
Expand Down
10 changes: 9 additions & 1 deletion test/index.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -92,6 +92,14 @@ describe('snarkdown()', () => {
it('parses an ordered list', () => {
expect(snarkdown('1. Ordered\n2. Lists\n4. Numbers are ignored')).to.equal('<ol><li>Ordered</li><li>Lists</li><li>Numbers are ignored</li></ol>');
});

it('parses nested lists', () => {
expect(snarkdown('* One\n\t* Two\n* One again')).to.equal('<ul><li>One<ul><li>Two</li></ul></li><li>One again</li></ul>');
});

it('parses nested lists of different types', () => {
expect(snarkdown('* One\n\t1. Two\n* One again')).to.equal('<ul><li>One<ol><li>Two</li></ol></li><li>One again</li></ul>');
});
});

describe('line breaks', () => {
Expand Down Expand Up @@ -133,7 +141,7 @@ describe('snarkdown()', () => {
});

it('parses lists within block quotes', () => {
expect(snarkdown('> - one\n> - two\n> - **three**\nhello')).to.equal('<blockquote><ul><li>one</li><li>two</li><li><strong>three</strong></li></ul></blockquote>\nhello');
expect(snarkdown('> - one\n> - two\n> - **three**\nhello')).to.equal('<blockquote><ul><li>one</li><li>two</li><li><strong>three</strong></li></ul></blockquote>hello');
});
});

Expand Down