"use strict";

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

var _utils = require("./utils");

var _slate = require("./slate");

function _createForOfIteratorHelper(o, allowArrayLike) { var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"]; if (!it) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var normalCompletion = true, didErr = false, err; return { s: function s() { it = it.call(o); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it.return != null) it.return(); } finally { if (didErr) throw err; } } }; }

function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }

function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }

function withMaxLength(editor) {
  var maxLength = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : -1;
  var e = editor; // 劫持粘贴方法，判断添加新粘贴的文本后是否超过 maxLength 并做相应处理

  e.insertData = function (data) {
    if (maxLength <= 0) {
      e.insertData(data);
      return;
    }

    var all = e.children;
    var surplusCount = maxLength - (0, _utils.serializeText)(all).length;
    /**
     * Checking copied fragment from application/x-slate-fragment or data-slate-fragment
     */

    var fragment = data.getData('application/x-slate-fragment') || (0, _utils.getSlateFragmentAttribute)(data);

    if (fragment) {
      var decoded = decodeURIComponent(window.atob(fragment));
      var parsed = JSON.parse(decoded); // TODO fragment 的字数限制待实现

      console.log('insertData:fragment', decoded);
      e.insertFragment(parsed);
      return;
    }

    var text = data.getData('text/plain');

    if (text) {
      var count = text.length;

      if (count > surplusCount) {
        text = text.substring(0, surplusCount);
      }

      var lines = text.split(/\r\n|\r|\n/);
      var split = false;

      var _iterator = _createForOfIteratorHelper(lines),
          _step;

      try {
        for (_iterator.s(); !(_step = _iterator.n()).done;) {
          var line = _step.value;

          if (split) {
            _slate.Transforms.splitNodes(e, {
              always: true
            });
          }

          e.insertText(line);
          split = true;
        }
      } catch (err) {
        _iterator.e(err);
      } finally {
        _iterator.f();
      }
    }
  };

  return e;
}