Function _flipYTogether

src/js/constraint.js:220–266

* Flip Y "together" * @param {object} tAttachment The target attachment * @param {object} eAttachment The element attachment * @param {number[]} bounds Array of bounds of the format [left, top, right, bottom] * @param {number} height * @param targetHeight * @param {number} top * @private

(tAttachment, eAttachment, bounds, height, targetHeight, top)

 * @private
 */
function _flipYTogether(tAttachment, eAttachment, bounds, height, targetHeight, top) {
  if (tAttachment.top === 'top') {
    if (eAttachment.top === 'bottom' && top < bounds[1]) {
      top += targetHeight;
      tAttachment.top = 'bottom';

      top += height;
      eAttachment.top = 'top';

    } else if (eAttachment.top === 'top' && top + height > bounds[3] && top - (height - targetHeight) >= bounds[1]) {
      top -= height - targetHeight;
      tAttachment.top = 'bottom';

      eAttachment.top = 'bottom';
    }
  }

  if (tAttachment.top === 'bottom') {
    if (eAttachment.top === 'top' && top + height > bounds[3]) {
      top -= targetHeight;
      tAttachment.top = 'top';

      top -= height;
      eAttachment.top = 'bottom';

    } else if (eAttachment.top === 'bottom' && top < bounds[1] && top + (height * 2 - targetHeight) <= bounds[3]) {
      top += height - targetHeight;
      tAttachment.top = 'top';

      eAttachment.top = 'top';

    }
  }

  if (tAttachment.top === 'middle') {
    if (top + height > bounds[3] && eAttachment.top === 'top') {
      top -= height;
      eAttachment.top = 'bottom';

    } else if (top < bounds[1] && eAttachment.top === 'bottom') {
      top += height;
      eAttachment.top = 'top';
    }
  }

  return top;
}

/**
 * Get all the initial classes