Function point_selector

js/src/BrushSelector.ts:32–63

(x, y)

// Instead of using mixins we use free functions for now

function point_selector(x, y) {
  return function (xar, yar) {
    if (typeof yar === 'undefined') {
      // the 'old' method for backwards compatibility
      return sel_utils.point_in_rectangle(xar, x, y);
    }

    const len = Math.min(xar.length, yar.length);
    const mask = new Uint8Array(len);
    // for performance we keep the if statement out of the loop
    if (x.length && y.length) {
      for (let i = 0; i < len; i++) {
        mask[i] =
          x[0] <= xar[i] && xar[i] <= x[1] && y[0] <= yar[i] && yar[i] <= y[1]
            ? 1
            : 0;
      }
      return mask;
    } else if (x.length) {
      for (let i = 0; i < len; i++) {
        mask[i] = x[0] <= xar[i] && xar[i] <= x[1] ? 1 : 0;
      }
    } else {
      // (y.length)
      for (let i = 0; i < len; i++) {
        mask[i] = y[0] <= yar[i] && yar[i] <= y[1] ? 1 : 0;
      }
    }

    return mask;
  };
}

function rect_selector(x, y) {
  return function (xy) {