@thewtex/vtk.js-esm/vendor/jszip/lib/compressedObject.js

Visualization Toolkit for the Web

import { e as external } from './external.js';
import { D as DataWorker_1 } from './stream/DataWorker.js';
import { D as DataLengthProbe_1 } from './stream/DataLengthProbe.js';
import { C as Crc32Probe_1 } from './stream/Crc32Probe.js';

/**
 * Represent a compressed object, with everything needed to decompress it.
 * @constructor
 * @param {number} compressedSize the size of the data compressed.
 * @param {number} uncompressedSize the size of the data after decompression.
 * @param {number} crc32 the crc32 of the decompressed file.
 * @param {object} compression the type of compression, see lib/compressions.js.
 * @param {String|ArrayBuffer|Uint8Array|Buffer} data the compressed data.
 */
function CompressedObject(compressedSize, uncompressedSize, crc32, compression, data) {
    this.compressedSize = compressedSize;
    this.uncompressedSize = uncompressedSize;
    this.crc32 = crc32;
    this.compression = compression;
    this.compressedContent = data;
}

CompressedObject.prototype = {
    /**
     * Create a worker to get the uncompressed content.
     * @return {GenericWorker} the worker.
     */
    getContentWorker : function () {
        var worker = new DataWorker_1(external.Promise.resolve(this.compressedContent))
        .pipe(this.compression.uncompressWorker())
        .pipe(new DataLengthProbe_1("data_length"));

        var that = this;
        worker.on("end", function () {
            if(this.streamInfo['data_length'] !== that.uncompressedSize) {
                throw new Error("Bug : uncompressed data size mismatch");
            }
        });
        return worker;
    },
    /**
     * Create a worker to get the compressed content.
     * @return {GenericWorker} the worker.
     */
    getCompressedWorker : function () {
        return new DataWorker_1(external.Promise.resolve(this.compressedContent))
        .withStreamInfo("compressedSize", this.compressedSize)
        .withStreamInfo("uncompressedSize", this.uncompressedSize)
        .withStreamInfo("crc32", this.crc32)
        .withStreamInfo("compression", this.compression)
        ;
    }
};

/**
 * Chain the given worker with other workers to compress the content with the
 * given compresion.
 * @param {GenericWorker} uncompressedWorker the worker to pipe.
 * @param {Object} compression the compression object.
 * @param {Object} compressionOptions the options to use when compressing.
 * @return {GenericWorker} the new worker compressing the content.
 */
CompressedObject.createWorkerFrom = function (uncompressedWorker, compression, compressionOptions) {
    return uncompressedWorker
    .pipe(new Crc32Probe_1())
    .pipe(new DataLengthProbe_1("uncompressedSize"))
    .pipe(compression.compressWorker(compressionOptions))
    .pipe(new DataLengthProbe_1("compressedSize"))
    .withStreamInfo("compression", compression);
};

var compressedObject = CompressedObject;

export { compressedObject as c };