@thi.ng/text-format/format.js

Customizable color text formatting with presets for ANSI & HTML

import {
  PRESETS_TPL
} from "./api.js";
const defFormat = (fmt, code) => (x) => fmt.format(code, x);
const defFormatPresets = (format2) => Object.keys(PRESETS_TPL).reduce(
  (acc, id) => (acc[id] = defFormat(format2, PRESETS_TPL[id]), acc),
  { format: format2 }
);
const format = (format2, data, width = data.length, offset = 0) => {
  const { start, end, prefix, suffix, zero } = format2;
  const check = zero ? () => prevID !== -1 : () => prevID !== 0;
  const res = [prefix];
  let prevID, ch, id;
  prevID = zero ? -1 : 0;
  for (let x = 0; x < width; x++) {
    ch = data[x + offset];
    id = ch >>> 16;
    if (id != prevID) {
      check() && res.push(end);
      (zero || id) && res.push(start(id));
      prevID = id;
    }
    res.push(String.fromCharCode(ch & 65535));
  }
  check() && res.push(end);
  res.push(suffix);
  return res.join("");
};
const formatNone = (data, width = data.length, offset = 0) => {
  const res = [];
  for (let x = 0; x < width; x++) {
    res.push(String.fromCharCode(data[x + offset] & 65535));
  }
  res.push("\n");
  return res.join("");
};
export {
  defFormat,
  defFormatPresets,
  format,
  formatNone
};