@lyra/form-builder/lib/inputs/BlockEditor/utils/createRange.js

Lyra form builder

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = createRange;

var _getWindow = require('get-window');

var _getWindow2 = _interopRequireDefault(_getWindow);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function createRange(event) {
  const window = (0, _getWindow2.default)(event.target);
  const x = event.x,
        y = event.y;
  // Resolve the point where the drag is now

  let range;
  // COMPAT: In Firefox, `caretRangeFromPoint` doesn't exist. (2016/07/25)
  if (window.document.caretRangeFromPoint) {
    range = window.document.caretRangeFromPoint(x, y);
  } else {
    range = window.document.createRange();
    range.setStart(event.rangeParent, event.rangeOffset);
  }

  if (!range || range.isCollapsed) {
    return null;
  }

  const rangeOffset = range.startOffset;
  const rangeLength = range.startContainer.wholeText ? range.startContainer.wholeText.length : 0;
  const rangeIsAtStart = rangeOffset < rangeLength / 2;
  range.detach();
  return {
    rangeOffset: rangeOffset,
    rangeLength: rangeLength,
    rangeIsAtStart: rangeIsAtStart
  };
}