Function isTouchpad

scripts/smoothScroll.js:723–748

(deltaY)

    }
  }
  function isTouchpad(deltaY) {
    if (!deltaY) return;
    if (!deltaBuffer.length) {
      deltaBuffer = [deltaY, deltaY, deltaY];
    }
    deltaY = Math.abs(deltaY);
    deltaBuffer.push(deltaY);
    deltaBuffer.shift();
    let dpiScaledWheelDelta = deltaY > 120 && allDeltasDivisableBy(deltaY); // win64
    let tp =
      !allDeltasDivisableBy(120) &&
      !allDeltasDivisableBy(100) &&
      !dpiScaledWheelDelta;
    if (deltaY < 50) tp = true;
    clearTimeout(deltaBufferTimer);
    deltaBufferTimer = setTimeout(function () {
      chrome?.storage?.local?.set?.({
        deltaBuffer: deltaBuffer,
      });
      if (!tp)
        chrome?.storage?.local?.set?.({
          lastDiscreetWheel: dateNow(),
        });
    }, 1000);
    return tp;
  }
  function isDivisible(n, divisor) {
    return Math.floor(n / divisor) == n / divisor;
  }