upfront-editable/lib/plugins/highlighting/match-collection.js

Friendly contenteditable API

"use strict";

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = void 0;

var _classCallCheck2 = _interopRequireDefault(require("@babel/runtime/helpers/classCallCheck"));

var _createClass2 = _interopRequireDefault(require("@babel/runtime/helpers/createClass"));

var MatchCollection = /*#__PURE__*/function () {
  function MatchCollection() {
    (0, _classCallCheck2["default"])(this, MatchCollection);
    this.matches = [];
  }

  (0, _createClass2["default"])(MatchCollection, [{
    key: "addMatches",
    value: function addMatches(name, matches) {
      if (!matches || !matches.length) return;
      this.matches = mergeMatches(this.matches, matches);
    }
  }]);
  return MatchCollection;
}(); // Private Helpers
// ---------------


exports["default"] = MatchCollection;

function mergeMatches(matches1, matches2) {
  var next;
  var length1 = matches1.length;
  var length2 = matches2.length;
  var lastEndIndex = -1;
  var output = [];
  var state = {
    a1: matches1,
    i1: 0,
    a2: matches2,
    i2: 0
  };

  while (state.i1 < length1 || state.i2 < length2) {
    next = pickNext(state);

    if (next.startIndex >= lastEndIndex) {
      output.push(next);
    }

    lastEndIndex = next.endIndex;
  }

  return output;
}

function pickNext(state) {
  var i1 = state.i1;
  var i2 = state.i2;
  var item1 = state.a1[i1];
  var item2 = state.a2[i2];

  if (item1 && item2 && item1.startIndex < item2.startIndex) {
    state.i1 = i1 + 1;
    return item1;
  } else if (item1 && item2) {
    state.i2 = i2 + 1;
    return item2;
  } else if (item1) {
    state.i1 = i1 + 1;
    return item1;
  } else if (item2) {
    state.i2 = i2 + 1;
    return item2;
  } else {
    return undefined;
  }
}

module.exports = exports.default;