ngx-bootstrap-fix-datepicker
Version:
Native Angular Bootstrap Components
54 lines • 6.02 kB
JavaScript
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
/**
* Finds the offset parent common to the two provided nodes
*/
import { isOffsetContainer } from './isOffsetContainer';
import { getRoot } from './getRoot';
import { getOffsetParent } from './getOffsetParent';
/**
* @param {?} element1
* @param {?} element2
* @return {?}
*/
export function findCommonOffsetParent(element1, element2) {
// This check is needed to avoid errors in case one of the elements isn't defined for any reason
if (!element1 || !element1.nodeType || !element2 || !element2.nodeType) {
return document.documentElement;
}
// Here we make sure to give as "start" the element that comes first in the DOM
/* tslint:disable-next-line: no-bitwise */
/** @type {?} */
const order = element1.compareDocumentPosition(element2) & Node.DOCUMENT_POSITION_FOLLOWING;
/** @type {?} */
const start = order ? element1 : element2;
/** @type {?} */
const end = order ? element2 : element1;
// Get common ancestor container
/** @type {?} */
const range = document.createRange();
range.setStart(start, 0);
range.setEnd(end, 0);
const { commonAncestorContainer } = range;
// Both nodes are inside #document
if ((element1 !== commonAncestorContainer &&
element2 !== commonAncestorContainer) ||
start.contains(end)) {
if (isOffsetContainer(commonAncestorContainer)) {
return commonAncestorContainer;
}
return getOffsetParent(commonAncestorContainer);
}
// one of the nodes is inside shadowDOM, find which one
/** @type {?} */
const element1root = getRoot(element1);
if (element1root.host) {
return findCommonOffsetParent(element1root.host, element2);
}
else {
return findCommonOffsetParent(element1, getRoot(element2).host);
}
}
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