upfront-editable/lib/util/element.js

Friendly contenteditable API

'use strict';

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.textNodesUnder = textNodesUnder;
exports.getTextNodeAndRelativeOffset = getTextNodeAndRelativeOffset;
exports.getTotalCharCount = getTotalCharCount;

var _toConsumableArray2 = _interopRequireDefault(require("@babel/runtime/helpers/toConsumableArray"));

var _nodeIterator = _interopRequireDefault(require("../node-iterator"));

function textNodesUnder(node) {
  var iterator = new _nodeIterator["default"](node, 'getNextTextNode');
  return (0, _toConsumableArray2["default"])(iterator);
} // NOTE: if there is only one text node, then just that node and
// the abs offset are returned


function getTextNodeAndRelativeOffset(_ref) {
  var textNodes = _ref.textNodes,
      absOffset = _ref.absOffset;
  var cumulativeOffset = 0;
  var relativeOffset = 0;
  var targetNode;

  for (var i = 0; i < textNodes.length; i++) {
    var node = textNodes[i];

    if (absOffset <= cumulativeOffset + node.textContent.length) {
      targetNode = node;
      relativeOffset = absOffset - cumulativeOffset;
      break;
    }

    cumulativeOffset += node.textContent.length;
  }

  return {
    node: targetNode,
    relativeOffset: relativeOffset
  };
}

function getTotalCharCount(element) {
  var textNodes = textNodesUnder(element);

  var reducer = function reducer(acc, node) {
    return acc + node.textContent.length;
  };

  return textNodes.reduce(reducer, 0);
}