@dnb/eufemia/shared/renderWithFormatting.js

DNB Eufemia Design System UI Library

import _pushInstanceProperty from "core-js-pure/stable/instance/push.js";
import React, { Fragment } from 'react';
import InlineLink from "./internal/InlineLink.js";
import CodeEl from "../elements/Code.js";
const Strong = c => React.createElement("strong", null, c);
const Em = c => React.createElement("em", null, c);
const Code = c => React.createElement(CodeEl, null, c);
const Link = (c, href) => React.createElement(InlineLink, {
  href: href,
  rel: "noopener noreferrer"
}, c);
export default function renderWithFormatting(text, {
  br = '{br}',
  strong = Strong,
  em = Em,
  link = Link,
  code = Code
} = {}) {
  if (typeof text === 'string') {
    const HAS_MARKERS_RE = /(`[^`]+`|\[[^\]]+\]\([^)\s]+\)|\bhttps?:\/\/[^\s<>()]+|\*\*[^*]+\*\*|_[^_]+_)/;
    const hasFormatting = br && text.includes(br) || HAS_MARKERS_RE.test(text);
    if (!hasFormatting) {
      return text;
    }
  }
  return withFormatting(text, {
    strong,
    em,
    br,
    link,
    code
  });
}
function withFormatting(text, {
  br,
  strong,
  em,
  link,
  code
}) {
  let nodes = Array.isArray(text) ? text : [text];
  nodes = splitToken(nodes, br, ({
    k
  }) => React.createElement("br", {
    key: k()
  }));
  const codeRe = /(`[^`]+`)/g;
  nodes = replaceInStrings(nodes, codeRe, (m, {
    k
  }) => [React.createElement(Fragment, {
    key: `c-${k()}`
  }, code(m[0].slice(1, -1)))]);
  const linkRe = /\[([^\]]+)\]\(([^)\s]+)\)/g;
  nodes = replaceInStrings(nodes, linkRe, (m, {
    k
  }) => {
    const [, label, href] = m;
    const children = withFormatting(label, {
      br,
      strong,
      em,
      link,
      code
    });
    return [React.createElement(Fragment, {
      key: `a-${k()}`
    }, link(children, href))];
  });
  const bareUrlRe = /\b((?:https?:\/\/)[^\s<>()]+)\b/g;
  nodes = replaceInStrings(nodes, bareUrlRe, (m, {
    k
  }) => {
    const href = m[1];
    return [React.createElement(Fragment, {
      key: `l-${k()}`
    }, link(href, href))];
  });
  const boldRe = /\*\*([^*]+)\*\*/g;
  nodes = replaceInStrings(nodes, boldRe, (m, {
    k
  }) => [React.createElement(Fragment, {
    key: `b-${k()}`
  }, strong(m[1]))]);
  const italicRe = /_([^_]+)_/g;
  nodes = replaceInStrings(nodes, italicRe, (m, {
    k
  }) => [React.createElement(Fragment, {
    key: `i-${k()}`
  }, em(m[1]))]);
  return React.createElement(Fragment, {
    key: "renderWithFormatting"
  }, nodes);
}
function replaceInStrings(nodes, re, replacer) {
  let key = 0;
  const k = () => String(key++);
  return nodes.flatMap((n, i) => {
    if (typeof n !== 'string') return [n];
    const out = [];
    let last = 0;
    let m;
    while ((m = re.exec(n)) !== null) {
      const before = n.slice(last, m.index);
      if (before) _pushInstanceProperty(out).call(out, before);
      _pushInstanceProperty(out).call(out, ...replacer(m, {
        i,
        k
      }));
      last = m.index + m[0].length;
      if (re.lastIndex === m.index) re.lastIndex++;
    }
    const tail = n.slice(last);
    if (tail) _pushInstanceProperty(out).call(out, tail);
    return out;
  });
}
function splitToken(nodes, token, make) {
  let key = 0;
  const k = () => String(key++);
  return nodes.flatMap((n, i) => {
    if (typeof n !== 'string') return [n];
    const parts = n.split(token);
    const out = [];
    parts.forEach((chunk, idx) => {
      if (chunk) _pushInstanceProperty(out).call(out, chunk);
      if (idx < parts.length - 1) _pushInstanceProperty(out).call(out, React.createElement(Fragment, {
        key: k()
      }, make({
        i,
        idx,
        k
      })));
    });
    return out;
  });
}
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