cafe-grader-web

Location: cafe-grader-web/node_modules/jszip/lib/flate.js - annotation

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Commit Description:
fix wrong merge
Commit Description:
fix wrong merge
References:
r846:4279bf26f98b algo
File last commit:
r789:8cd7e8db7e38 default
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node_modules/jszip/lib/flate.js | 85 lines | 2.3 KiB | application/javascript | JavascriptLexer |
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move datatable to yarn
 r789 'use strict';
var USE_TYPEDARRAY = (typeof Uint8Array !== 'undefined') && (typeof Uint16Array !== 'undefined') && (typeof Uint32Array !== 'undefined');
var pako = require("pako");
var utils = require("./utils");
var GenericWorker = require("./stream/GenericWorker");
var ARRAY_TYPE = USE_TYPEDARRAY ? "uint8array" : "array";
exports.magic = "\x08\x00";
/**
* Create a worker that uses pako to inflate/deflate.
* @constructor
* @param {String} action the name of the pako function to call : either "Deflate" or "Inflate".
* @param {Object} options the options to use when (de)compressing.
*/
function FlateWorker(action, options) {
GenericWorker.call(this, "FlateWorker/" + action);
this._pako = null;
this._pakoAction = action;
this._pakoOptions = options;
// the `meta` object from the last chunk received
// this allow this worker to pass around metadata
this.meta = {};
}
utils.inherits(FlateWorker, GenericWorker);
/**
* @see GenericWorker.processChunk
*/
FlateWorker.prototype.processChunk = function (chunk) {
this.meta = chunk.meta;
if (this._pako === null) {
this._createPako();
}
this._pako.push(utils.transformTo(ARRAY_TYPE, chunk.data), false);
};
/**
* @see GenericWorker.flush
*/
FlateWorker.prototype.flush = function () {
GenericWorker.prototype.flush.call(this);
if (this._pako === null) {
this._createPako();
}
this._pako.push([], true);
};
/**
* @see GenericWorker.cleanUp
*/
FlateWorker.prototype.cleanUp = function () {
GenericWorker.prototype.cleanUp.call(this);
this._pako = null;
};
/**
* Create the _pako object.
* TODO: lazy-loading this object isn't the best solution but it's the
* quickest. The best solution is to lazy-load the worker list. See also the
* issue #446.
*/
FlateWorker.prototype._createPako = function () {
this._pako = new pako[this._pakoAction]({
raw: true,
level: this._pakoOptions.level || -1 // default compression
});
var self = this;
this._pako.onData = function(data) {
self.push({
data : data,
meta : self.meta
});
};
};
exports.compressWorker = function (compressionOptions) {
return new FlateWorker("Deflate", compressionOptions);
};
exports.uncompressWorker = function () {
return new FlateWorker("Inflate", {});
};