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Filename : getScrollParents.js
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/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 - present Instructure, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

import { findDOMNode } from './findDOMNode';
import { canUseDOM } from './canUseDOM';
import { getComputedStyle } from './getComputedStyle';
/**
 * ---
 * category: utilities/DOM
 * ---
 *
 * Retrieves the scroll parents of a specified element.
 * Includes parents of nodeType 1 (Element nodes such
 * as <p> or <div>) that have overflow css properties
 * set to auto, scroll, or overlay
 * @module getScrollParents
 *
 * @param { Node | Window | React.ReactElement | React.Component | function | null } el - component or DOM node
 * @returns {Array} scroll parents
 */
function getScrollParents(el) {
  const parents = [];
  if (!canUseDOM) {
    return parents;
  }
  const node = el && findDOMNode(el);
  if (node) {
    // In firefox if the element is inside an iframe with display: none; window.getComputedStyle() will return null;
    // https://bugzilla.mozilla.org/show_bug.cgi?id=548397
    const computedStyle = getComputedStyle(node) || {};
    const position = computedStyle.position;
    if (position === 'fixed') {
      return [node.ownerDocument];
    }
    let parent = node;
    // eslint-disable-next-line no-cond-assign
    while (parent && parent.nodeType === 1 && (parent = parent.parentNode)) {
      let style;
      try {
        style = getComputedStyle(parent);
      } catch (err) {} // eslint-disable-line no-empty

      if (typeof style === 'undefined' || style === null) {
        parents.push(parent);
        return parents;
      }
      const _ref = style,
        overflow = _ref.overflow,
        overflowX = _ref.overflowX,
        overflowY = _ref.overflowY;
      if (/(auto|scroll|overlay)/.test(overflow + overflowY + overflowX)) {
        if (position !== 'absolute' || ['relative', 'absolute', 'fixed'].indexOf(style.position) >= 0) {
          parents.push(parent);
        }
      }
    }
    const ownerDocument = node.ownerDocument;
    if (ownerDocument) {
      parents.push(ownerDocument.body);

      // If the node is within a frame, account for the parent window scroll
      if (ownerDocument !== document) {
        // ownerDocument.defaultView can be null
        parents.push(ownerDocument.defaultView);
      }
    }
  }
  return parents;
}
export default getScrollParents;
export { getScrollParents };