@gechiui/dom
Version:
DOM utilities module for GeChiUI.
36 lines (33 loc) • 1.34 kB
JavaScript
/**
* Internal dependencies
*/
import caretRangeFromPoint from './caret-range-from-point';
import getComputedStyle from './get-computed-style';
/**
* Get a collapsed range for a given point.
* Gives the container a temporary high z-index (above any UI).
* This is preferred over getting the UI nodes and set styles there.
*
* @param {Document} doc The document of the range.
* @param {number} x Horizontal position within the current viewport.
* @param {number} y Vertical position within the current viewport.
* @param {HTMLElement} container Container in which the range is expected to be found.
*
* @return {?Range} The best range for the given point.
*/
export default function hiddenCaretRangeFromPoint(doc, x, y, container) {
const originalZIndex = container.style.zIndex;
const originalPosition = container.style.position;
const {
position = 'static'
} = getComputedStyle(container); // A z-index only works if the element position is not static.
if (position === 'static') {
container.style.position = 'relative';
}
container.style.zIndex = '10000';
const range = caretRangeFromPoint(doc, x, y);
container.style.zIndex = originalZIndex;
container.style.position = originalPosition;
return range;
}
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