@wordpress/dom/build/dom/hidden-caret-range-from-point.js

DOM utilities module for WordPress.

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = hiddenCaretRangeFromPoint;
var _caretRangeFromPoint = _interopRequireDefault(require("./caret-range-from-point"));
var _getComputedStyle = _interopRequireDefault(require("./get-computed-style"));
/**
 * Internal dependencies
 */

/**
 * 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.
 */
function hiddenCaretRangeFromPoint(doc, x, y, container) {
  const originalZIndex = container.style.zIndex;
  const originalPosition = container.style.position;
  const {
    position = 'static'
  } = (0, _getComputedStyle.default)(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 = (0, _caretRangeFromPoint.default)(doc, x, y);
  container.style.zIndex = originalZIndex;
  container.style.position = originalPosition;
  return range;
}
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