@dnb/eufemia/es/shared/renderWithFormatting.js

DNB Eufemia Design System UI Library

import React, { Fragment } from 'react';
import InlineLink from "./internal/InlineLink.js";
import CodeEl from "../elements/Code.js";
import { jsx as _jsx } from "react/jsx-runtime";
const Strong = c => _jsx("strong", {
  children: c
});
const Em = c => _jsx("em", {
  children: c
});
const Code = c => _jsx(CodeEl, {
  children: c
});
const Link = (c, href) => _jsx(InlineLink, {
  href: href,
  rel: "noopener noreferrer",
  children: 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
  }) => _jsx("br", {}, k()));
  const codeRe = /(`[^`]+`)/g;
  nodes = replaceInStrings(nodes, codeRe, (m, {
    k
  }) => [_jsx(Fragment, {
    children: code(m[0].slice(1, -1))
  }, `c-${k()}`)]);
  const linkRe = /\[([^\]]+)\]\(([^)\s]+)\)/g;
  nodes = replaceInStrings(nodes, linkRe, (m, {
    k
  }) => {
    const [, label, href] = m;
    const children = withFormatting(label, {
      br,
      strong,
      em,
      link,
      code
    });
    return [_jsx(Fragment, {
      children: link(children, href)
    }, `a-${k()}`)];
  });
  const bareUrlRe = /\b((?:https?:\/\/)[^\s<>()]+)\b/g;
  nodes = replaceInStrings(nodes, bareUrlRe, (m, {
    k
  }) => {
    const href = m[1];
    return [_jsx(Fragment, {
      children: link(href, href)
    }, `l-${k()}`)];
  });
  const boldRe = /\*\*([^*]+)\*\*/g;
  nodes = replaceInStrings(nodes, boldRe, (m, {
    k
  }) => [_jsx(Fragment, {
    children: strong(m[1])
  }, `b-${k()}`)]);
  const italicRe = /_([^_]+)_/g;
  nodes = replaceInStrings(nodes, italicRe, (m, {
    k
  }) => [_jsx(Fragment, {
    children: em(m[1])
  }, `i-${k()}`)]);
  return _jsx(Fragment, {
    children: nodes
  }, "renderWithFormatting");
}
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) out.push(before);
      out.push(...replacer(m, {
        i,
        k
      }));
      last = m.index + m[0].length;
      if (re.lastIndex === m.index) re.lastIndex++;
    }
    const tail = n.slice(last);
    if (tail) out.push(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) out.push(chunk);
      if (idx < parts.length - 1) out.push(_jsx(Fragment, {
        children: make({
          i,
          idx,
          k
        })
      }, k()));
    });
    return out;
  });
}
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