dxf/lib/parseString.js

DXF parser for node/browser

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = void 0;
var _header = _interopRequireDefault(require("./handlers/header"));
var _tables = _interopRequireDefault(require("./handlers/tables"));
var _blocks = _interopRequireDefault(require("./handlers/blocks"));
var _entities = _interopRequireDefault(require("./handlers/entities"));
var _objects = _interopRequireDefault(require("./handlers/objects"));
var _logger = _interopRequireDefault(require("./util/logger"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { "default": e }; }
function _createForOfIteratorHelper(r, e) { var t = "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"]; if (!t) { if (Array.isArray(r) || (t = _unsupportedIterableToArray(r)) || e && r && "number" == typeof r.length) { t && (r = t); var _n = 0, F = function F() {}; return { s: F, n: function n() { return _n >= r.length ? { done: !0 } : { done: !1, value: r[_n++] }; }, e: function e(r) { throw r; }, 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 o, a = !0, u = !1; return { s: function s() { t = t.call(r); }, n: function n() { var r = t.next(); return a = r.done, r; }, e: function e(r) { u = !0, o = r; }, f: function f() { try { a || null == t["return"] || t["return"](); } finally { if (u) throw o; } } }; }
function _unsupportedIterableToArray(r, a) { if (r) { if ("string" == typeof r) return _arrayLikeToArray(r, a); var t = {}.toString.call(r).slice(8, -1); return "Object" === t && r.constructor && (t = r.constructor.name), "Map" === t || "Set" === t ? Array.from(r) : "Arguments" === t || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(t) ? _arrayLikeToArray(r, a) : void 0; } }
function _arrayLikeToArray(r, a) { (null == a || a > r.length) && (a = r.length); for (var e = 0, n = Array(a); e < a; e++) n[e] = r[e]; return n; }
// Parse the value into the native representation
var parseValue = function parseValue(type, value) {
  if (type >= 10 && type < 60) {
    return parseFloat(value, 10);
  } else if (type >= 210 && type < 240) {
    return parseFloat(value, 10);
  } else if (type >= 60 && type < 100) {
    return parseInt(value, 10);
  } else {
    return value;
  }
};

// Content lines are alternate lines of type and value
var convertToTypesAndValues = function convertToTypesAndValues(contentLines) {
  var state = 'type';
  var type;
  var typesAndValues = [];
  var _iterator = _createForOfIteratorHelper(contentLines),
    _step;
  try {
    for (_iterator.s(); !(_step = _iterator.n()).done;) {
      var line = _step.value;
      if (state === 'type') {
        type = parseInt(line, 10);
        state = 'value';
      } else {
        typesAndValues.push([type, parseValue(type, line)]);
        state = 'type';
      }
    }
  } catch (err) {
    _iterator.e(err);
  } finally {
    _iterator.f();
  }
  return typesAndValues;
};
var separateSections = function separateSections(tuples) {
  var sectionTuples;
  return tuples.reduce(function (sections, tuple) {
    if (tuple[0] === 0 && tuple[1] === 'SECTION') {
      sectionTuples = [];
    } else if (tuple[0] === 0 && tuple[1] === 'ENDSEC') {
      sections.push(sectionTuples);
      sectionTuples = undefined;
    } else if (sectionTuples !== undefined) {
      sectionTuples.push(tuple);
    }
    return sections;
  }, []);
};

// Each section start with the type tuple, then proceeds
// with the contents of the section
var reduceSection = function reduceSection(acc, section) {
  var sectionType = section[0][1];
  var contentTuples = section.slice(1);
  switch (sectionType) {
    case 'HEADER':
      acc.header = (0, _header["default"])(contentTuples);
      break;
    case 'TABLES':
      acc.tables = (0, _tables["default"])(contentTuples);
      break;
    case 'BLOCKS':
      acc.blocks = (0, _blocks["default"])(contentTuples);
      break;
    case 'ENTITIES':
      acc.entities = (0, _entities["default"])(contentTuples);
      break;
    case 'OBJECTS':
      acc.objects = (0, _objects["default"])(contentTuples);
      break;
    default:
      _logger["default"].warn("Unsupported section: ".concat(sectionType));
  }
  return acc;
};
var _default = exports["default"] = function _default(string) {
  var lines = string.split(/\r\n|\r|\n/g);
  var tuples = convertToTypesAndValues(lines);
  var sections = separateSections(tuples);
  var result = sections.reduce(reduceSection, {
    // Start with empty defaults in the event of empty sections
    header: {},
    blocks: [],
    entities: [],
    objects: {
      layouts: []
    },
    tables: {
      layers: {},
      styles: {},
      ltypes: {}
    }
  });
  return result;
};