@vivliostyle/vfm/lib/plugins/ruby.js

Custom Markdown syntax specialized in book authoring.

import { all } from 'mdast-util-to-hast';
import { u } from 'unist-builder';
// remark
function locateRuby(value, fromIndex) {
    return value.indexOf('{', fromIndex);
}
const tokenizer = function (eat, value, silent) {
    const now = eat.now();
    const match = /^{(.+?)(?<=[^\\|])\|(.+?)}/.exec(value);
    if (!match)
        return;
    const [eaten, inlineContent, rubyText] = match;
    if (silent)
        return true;
    now.column += 1;
    now.offset += 1;
    return eat(eaten)({
        type: 'ruby',
        children: this.tokenizeInline(inlineContent, now),
        data: { hName: 'ruby', rubyText },
    });
};
tokenizer.notInLink = true;
tokenizer.locator = locateRuby;
export const mdast = function () {
    if (!this.Parser)
        return;
    const { inlineTokenizers, inlineMethods } = this.Parser.prototype;
    inlineTokenizers.ruby = tokenizer;
    inlineMethods.splice(inlineMethods.indexOf('text'), 0, 'ruby');
};
// rehype
export const handler = (h, node) => {
    if (!node.data)
        node.data = {};
    const rtNode = h({
        type: 'element',
    }, 'rt', [u('text', node.data.rubyText)]);
    return h(node, 'ruby', [...all(h, node), rtNode]);
};