@replit/novnc/lib/inflator.js

An HTML5 VNC client

"use strict";

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

var _inflate2 = require("../lib/vendor/pako/lib/zlib/inflate.js");

var _zstream = _interopRequireDefault(require("../lib/vendor/pako/lib/zlib/zstream.js"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

var Inflate = /*#__PURE__*/function () {
  function Inflate() {
    _classCallCheck(this, Inflate);

    this.strm = new _zstream["default"]();
    this.chunkSize = 1024 * 10 * 10;
    this.strm.output = new Uint8Array(this.chunkSize);
    this.windowBits = 5;
    (0, _inflate2.inflateInit)(this.strm, this.windowBits);
  }

  _createClass(Inflate, [{
    key: "setInput",
    value: function setInput(data) {
      if (!data) {
        //FIXME: flush remaining data.

        /* eslint-disable camelcase */
        this.strm.input = null;
        this.strm.avail_in = 0;
        this.strm.next_in = 0;
      } else {
        this.strm.input = data;
        this.strm.avail_in = this.strm.input.length;
        this.strm.next_in = 0;
        /* eslint-enable camelcase */
      }
    }
  }, {
    key: "inflate",
    value: function inflate(expected) {
      // resize our output buffer if it's too small
      // (we could just use multiple chunks, but that would cause an extra
      // allocation each time to flatten the chunks)
      if (expected > this.chunkSize) {
        this.chunkSize = expected;
        this.strm.output = new Uint8Array(this.chunkSize);
      }
      /* eslint-disable camelcase */


      this.strm.next_out = 0;
      this.strm.avail_out = expected;
      /* eslint-enable camelcase */

      var ret = (0, _inflate2.inflate)(this.strm, 0); // Flush argument not used.

      if (ret < 0) {
        throw new Error("zlib inflate failed");
      }

      if (this.strm.next_out != expected) {
        throw new Error("Incomplete zlib block");
      }

      return new Uint8Array(this.strm.output.buffer, 0, this.strm.next_out);
    }
  }, {
    key: "reset",
    value: function reset() {
      (0, _inflate2.inflateReset)(this.strm);
    }
  }]);

  return Inflate;
}();

exports["default"] = Inflate;