import { viewport } from '../enums.mjs';
import getViewportRect from './getViewportRect.mjs';
import getDocumentRect from './getDocumentRect.mjs';
import listScrollParents from './listScrollParents.mjs';
import getOffsetParent from './getOffsetParent.mjs';
import getDocumentElement from './getDocumentElement.mjs';
import getComputedStyle from './getComputedStyle.mjs';
import { isHTMLElement, isElement } from './instanceOf.mjs';
import getBoundingClientRect from './getBoundingClientRect.mjs';
import getParentNode from './getParentNode.mjs';
import contains from './contains.mjs';
import getNodeName from './getNodeName.mjs';
import rectToClientRect from '../utils/rectToClientRect.mjs';
import { max, min } from '../utils/math.mjs';

function getInnerBoundingClientRect(element, strategy) {
  var rect = getBoundingClientRect(element, false, strategy === 'fixed');
  rect.top = rect.top + element.clientTop;
  rect.left = rect.left + element.clientLeft;
  rect.bottom = rect.top + element.clientHeight;
  rect.right = rect.left + element.clientWidth;
  rect.width = element.clientWidth;
  rect.height = element.clientHeight;
  rect.x = rect.left;
  rect.y = rect.top;
  return rect;
}

function getClientRectFromMixedType(element, clippingParent, strategy) {
  return clippingParent === viewport ? rectToClientRect(getViewportRect(element, strategy)) : isElement(clippingParent) ? getInnerBoundingClientRect(clippingParent, strategy) : rectToClientRect(getDocumentRect(getDocumentElement(element)));
} // A "clipping parent" is an overflowable container with the characteristic of
// clipping (or hiding) overflowing elements with a position different from
// `initial`


function getClippingParents(element) {
  var clippingParents = listScrollParents(getParentNode(element));
  var canEscapeClipping = ['absolute', 'fixed'].indexOf(getComputedStyle(element).position) >= 0;
  var clipperElement = canEscapeClipping && isHTMLElement(element) ? getOffsetParent(element) : element;

  if (!isElement(clipperElement)) {
    return [];
  } // $FlowFixMe[incompatible-return]: https://github.com/facebook/flow/issues/1414


  return clippingParents.filter(function (clippingParent) {
    return isElement(clippingParent) && contains(clippingParent, clipperElement) && getNodeName(clippingParent) !== 'body';
  });
} // Gets the maximum area that the element is visible in due to any number of
// clipping parents


function getClippingRect(element, boundary, rootBoundary, strategy) {
  var mainClippingParents = boundary === 'clippingParents' ? getClippingParents(element) : [].concat(boundary);
  var clippingParents = [].concat(mainClippingParents, [rootBoundary]);
  var firstClippingParent = clippingParents[0];
  var clippingRect = clippingParents.reduce(function (accRect, clippingParent) {
    var rect = getClientRectFromMixedType(element, clippingParent, strategy);
    accRect.top = max(rect.top, accRect.top);
    accRect.right = min(rect.right, accRect.right);
    accRect.bottom = min(rect.bottom, accRect.bottom);
    accRect.left = max(rect.left, accRect.left);
    return accRect;
  }, getClientRectFromMixedType(element, firstClippingParent, strategy));
  clippingRect.width = clippingRect.right - clippingRect.left;
  clippingRect.height = clippingRect.bottom - clippingRect.top;
  clippingRect.x = clippingRect.left;
  clippingRect.y = clippingRect.top;
  return clippingRect;
}

export { getClippingRect as default };
//# sourceMappingURL=getClippingRect.mjs.map
