very-small-parser/esm/markdown/inline/toText.js

A very small Markdown, HTML, and CSS parser.

import { toText as hastToText } from '../../html/toText';
const toTextChildren = (children, ctx) => {
    if (!children)
        return '';
    let str = '';
    const length = children.length;
    for (let i = 0; i < length; i++)
        str += toText(children[i], ctx);
    return str;
};
export const toText = (node, ctx = { b: '_' }) => {
    if (Array.isArray(node))
        return toTextChildren(node);
    const inline = node;
    const type = inline.type;
    switch (type) {
        case 'text':
            return inline.value;
        case 'inlineCode':
            return '`' + node.value + '`';
        case 'strong': {
            const markup = ctx.b + ctx.b;
            return markup + toTextChildren(inline.children, { ...ctx, b: ctx.b === '_' ? '*' : '_' }) + markup;
        }
        case 'emphasis': {
            const markup = ctx.b;
            return markup + toTextChildren(inline.children, { ...ctx, b: ctx.b === '_' ? '*' : '_' }) + markup;
        }
        case 'delete':
            return '~~' + toTextChildren(inline.children) + '~~';
        case 'spoiler':
            return '||' + toTextChildren(inline.children) + '||';
        case 'inlineMath':
            return '$' + inline.value + '$';
        case 'footnoteReference':
            return '[^' + inline.label + ']';
        case 'linkReference':
        case 'imageReference': {
            const { identifier, referenceType } = inline;
            const start = type === 'imageReference' ? '![' : '[';
            switch (referenceType) {
                case 'full':
                    return (start + (type === 'imageReference' ? inline.alt : toTextChildren(inline.children)) + '][' + identifier + ']');
                case 'collapsed':
                    return start + identifier + '][]';
                // case 'shortcut':
                default:
                    return start + identifier + ']';
            }
        }
        case 'link':
        case 'image': {
            const { title, url } = inline;
            const start = type === 'image' ? '![' + inline.alt : '[' + toTextChildren(inline.children);
            return start + '](' + url + (title ? ' "' + title + '"' : '') + ')';
        }
        case 'inlineLink':
            return inline.value;
        case 'sup':
            return '^' + toTextChildren(inline.children) + '^';
        case 'sub':
            return '~' + toTextChildren(inline.children) + '~';
        case 'mark':
            return '==' + toTextChildren(inline.children) + '==';
        case 'handle':
            return inline.prefix + inline.value;
        case 'underline':
            return '++' + toTextChildren(inline.children) + '++';
        case 'break':
            return '  \n';
        case 'icon':
            return ':' + inline.emoji + ':';
        case 'element':
            return hastToText(inline, '  ');
        case 'whitespace':
            return ' '.repeat(inline.length);
    }
    return toTextChildren(inline.children);
};