You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
64 lines
2.4 KiB
64 lines
2.4 KiB
/**
|
|
* Copyright (c) Facebook, Inc. and its affiliates.
|
|
*/
|
|
|
|
/*!
|
|
* Based on 'gatsby-remark-autolink-headers'
|
|
* Original Author: Kyle Mathews <mathews.kyle@gmail.com>
|
|
* Updated by Jared Palmer;
|
|
* Copyright (c) 2015 Gatsbyjs
|
|
*/
|
|
|
|
const toString = require('mdast-util-to-string');
|
|
const visit = require('unist-util-visit');
|
|
const slugs = require('github-slugger')();
|
|
|
|
function patch(context, key, value) {
|
|
if (!context[key]) {
|
|
context[key] = value;
|
|
}
|
|
return context[key];
|
|
}
|
|
|
|
const svgIcon = `<svg aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg>`;
|
|
|
|
module.exports = ({
|
|
icon = svgIcon,
|
|
className = `anchor`,
|
|
maintainCase = false,
|
|
} = {}) => {
|
|
slugs.reset();
|
|
return function transformer(tree) {
|
|
visit(tree, 'heading', (node) => {
|
|
const children = node.children;
|
|
let tail = children[children.length - 1];
|
|
// Generate slugs on the fly (even if not specified in markdown)
|
|
// so that it's possible to copy anchor links in newly written content.
|
|
let id = slugs.slug(toString(node), maintainCase);
|
|
// However, for committed docs, we'll extract slug from the headers.
|
|
if (tail && tail.type === 'text' && tail.value === '/}') {
|
|
tail = children[children.length - 2];
|
|
if (tail && tail.type === 'emphasis') {
|
|
// Use custom ID instead.
|
|
id = toString(tail);
|
|
// Until we're on MDX 2, we need to "cut off" the comment syntax.
|
|
tail = children[children.length - 3];
|
|
if (tail && tail.type === 'text' && tail.value.endsWith('{/')) {
|
|
// Remove the emphasis and trailing `/}`
|
|
children.splice(children.length - 2, 2);
|
|
// Remove the `{/`
|
|
tail.value = tail.value.replace(/[ \t]*\{\/$/, '');
|
|
}
|
|
}
|
|
}
|
|
|
|
const data = patch(node, 'data', {});
|
|
|
|
patch(data, 'id', id);
|
|
patch(data, 'htmlAttributes', {});
|
|
patch(data, 'hProperties', {});
|
|
patch(data.htmlAttributes, 'id', id);
|
|
patch(data.hProperties, 'id', id);
|
|
});
|
|
};
|
|
};
|
|
|