Function fitAnsi

src/tui/utils.js:29–116

(str, width, { align = 'left', ellipsis = false, pad = true } = {})

}

function fitAnsi(str, width, { align = 'left', ellipsis = false, pad = true } = {}) {
  if (width <= 0) return '';
  let i = 0;
  const items = [];
  let totalVis = 0;
  const chars = Array.from(str);

  while (i < chars.length) {
    if (chars[i] === '\x1b') {
      let j = i;
      while (j < chars.length) {
        const c = chars[j];
        if (j > i && ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))) {
          break;
        }
        j++;
      }
      if (j < chars.length) {
        items.push({ isAnsi: true, code: chars.slice(i, j + 1).join(''), width: 0 });
        i = j + 1;
        continue;
      }
    }

    const ch = chars[i];
    const w = visualWidth(ch);
    items.push({ isAnsi: false, char: ch, width: w });
    totalVis += w;
    i++;
  }

  if (totalVis <= width) {
    let body = '';
    for (const item of items) {
      if (item.isAnsi) body += item.code;
      else body += item.char;
    }
    if (str.includes('\x1b') && !body.endsWith('\x1b[0m')) body += '\x1b[0m';

    if (pad) {
      const padAmount = width - totalVis;
      const paddedContent = padAmount > 0 ? ' '.repeat(padAmount) : '';
      return align === 'right' ? paddedContent + body : body + paddedContent;
    }
    return body;
  }

  let targetWidth = width;
  let addDots = false;
  if (ellipsis && width > 3) {
    targetWidth = width - 3;
    addDots = true;
  }

  let currentWidth = 0;
  const keepItems = [];
  for (const item of items) {
    if (item.isAnsi) {