@protobi/exceljs/dist/es5/csv/line-buffer.js

Excel Workbook Manager - Temporary fork with pivot table enhancements and bug fixes pending upstream merge

"use strict";

function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
function _classCallCheck(a, n) { if (!(a instanceof n)) throw new TypeError("Cannot call a class as a function"); }
function _defineProperties(e, r) { for (var t = 0; t < r.length; t++) { var o = r[t]; o.enumerable = o.enumerable || !1, o.configurable = !0, "value" in o && (o.writable = !0), Object.defineProperty(e, _toPropertyKey(o.key), o); } }
function _createClass(e, r, t) { return r && _defineProperties(e.prototype, r), t && _defineProperties(e, t), Object.defineProperty(e, "prototype", { writable: !1 }), e; }
function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == _typeof(i) ? i : i + ""; }
function _toPrimitive(t, r) { if ("object" != _typeof(t) || !t) return t; var e = t[Symbol.toPrimitive]; if (void 0 !== e) { var i = e.call(t, r || "default"); if ("object" != _typeof(i)) return i; throw new TypeError("@@toPrimitive must return a primitive value."); } return ("string" === r ? String : Number)(t); }
function _inherits(t, e) { if ("function" != typeof e && null !== e) throw new TypeError("Super expression must either be null or a function"); t.prototype = Object.create(e && e.prototype, { constructor: { value: t, writable: !0, configurable: !0 } }), Object.defineProperty(t, "prototype", { writable: !1 }), e && _setPrototypeOf(t, e); }
function _setPrototypeOf(t, e) { return _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function (t, e) { return t.__proto__ = e, t; }, _setPrototypeOf(t, e); }
function _createSuper(t) { var r = _isNativeReflectConstruct(); return function () { var e, o = _getPrototypeOf(t); if (r) { var s = _getPrototypeOf(this).constructor; e = Reflect.construct(o, arguments, s); } else e = o.apply(this, arguments); return _possibleConstructorReturn(this, e); }; }
function _possibleConstructorReturn(t, e) { if (e && ("object" == _typeof(e) || "function" == typeof e)) return e; if (void 0 !== e) throw new TypeError("Derived constructors may only return object or undefined"); return _assertThisInitialized(t); }
function _assertThisInitialized(e) { if (void 0 === e) throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); return e; }
function _isNativeReflectConstruct() { try { var t = !Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); } catch (t) {} return (_isNativeReflectConstruct = function _isNativeReflectConstruct() { return !!t; })(); }
function _getPrototypeOf(t) { return _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf.bind() : function (t) { return t.__proto__ || Object.getPrototypeOf(t); }, _getPrototypeOf(t); }
var _require = require('events'),
  EventEmitter = _require.EventEmitter;
var LineBuffer = /*#__PURE__*/function (_EventEmitter) {
  _inherits(LineBuffer, _EventEmitter);
  var _super = _createSuper(LineBuffer);
  function LineBuffer(options) {
    var _this;
    _classCallCheck(this, LineBuffer);
    _this = _super.call(this);
    _this.encoding = options.encoding;
    _this.buffer = null;

    // part of cork/uncork
    _this.corked = false;
    _this.queue = [];
    return _this;
  }

  // Events:
  //  line: here is a line
  //  done: all lines emitted
  _createClass(LineBuffer, [{
    key: "write",
    value: function write(chunk) {
      // find line or lines in chunk and emit them if not corked
      // or queue them if corked
      var data = this.buffer ? this.buffer + chunk : chunk;
      var lines = data.split(/\r?\n/g);

      // save the last line
      this.buffer = lines.pop();
      lines.forEach(function (line) {
        if (this.corked) {
          this.queue.push(line);
        } else {
          this.emit('line', line);
        }
      });
      return !this.corked;
    }
  }, {
    key: "cork",
    value: function cork() {
      this.corked = true;
    }
  }, {
    key: "uncork",
    value: function uncork() {
      this.corked = false;
      this._flush();

      // tell the source I'm ready again
      this.emit('drain');
    }
  }, {
    key: "setDefaultEncoding",
    value: function setDefaultEncoding() {
      // ?
    }
  }, {
    key: "end",
    value: function end() {
      if (this.buffer) {
        this.emit('line', this.buffer);
        this.buffer = null;
      }
      this.emit('done');
    }
  }, {
    key: "_flush",
    value: function _flush() {
      var _this2 = this;
      if (!this.corked) {
        this.queue.forEach(function (line) {
          _this2.emit('line', line);
        });
        this.queue = [];
      }
    }
  }]);
  return LineBuffer;
}(EventEmitter);
module.exports = LineBuffer;
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