Function wrapLabelText

server.js:260–294

(text, maxWidth, scale)

}

function wrapLabelText(text, maxWidth, scale) {
  const words = String(text).toUpperCase().replace(/\s+/g, " ").trim().split(" ").filter(Boolean);
  const lines = [];
  let current = "";
  for (const word of words) {
    const candidate = current ? `${current} ${word}` : word;
    if (!current || textPixelWidth(candidate, scale) <= maxWidth) {
      current = candidate;
    } else {
      lines.push(current);
      current = word;
    }
  }
  if (current) lines.push(current);
  if (!lines.length) lines.push("");

  let truncated = lines.length > 2;
  const visible = lines.slice(0, 2);
  for (let index = 0; index < visible.length; index += 1) {
    if (textPixelWidth(visible[index], scale) <= maxWidth) continue;
    truncated = true;
    while (visible[index] && textPixelWidth(`${visible[index]}...`, scale) > maxWidth) {
      visible[index] = visible[index].slice(0, -1).trimEnd();
    }
    visible[index] = `${visible[index]}...`;
  }
  if (truncated) {
    let last = visible[visible.length - 1] || "";
    while (last && textPixelWidth(`${last}...`, scale) > maxWidth) {
      last = last.slice(0, -1).trimEnd();
    }
    visible[visible.length - 1] = `${last}...`;
  }
  return { lines: visible, truncated };
}

function setPixel(rgba, width, x, y, color) {
  const index = (y * width + x) * 4;