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443 lines
14 KiB
JavaScript
443 lines
14 KiB
JavaScript
/* alphanum.js (C) Brian Huisman
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* Based on the Alphanum Algorithm by David Koelle
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* The Alphanum Algorithm is discussed at http://www.DaveKoelle.com
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*
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* Distributed under same license as original
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*
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* Released under the MIT License - https://opensource.org/licenses/MIT
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/* ********************************************************************
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* Alphanum sort() function version - case insensitive
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* - Slower, but easier to modify for arrays of objects which contain
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* string properties
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*
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*/
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function alphanumCase(a, b) {
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function chunkify(t) {
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var tz = new Array();
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var x = 0, y = -1, n = 0, i, j;
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while (i = (j = t.charAt(x++)).charCodeAt(0)) {
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var m = (i == 46 || (i >=48 && i <= 57));
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if (m !== n) {
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tz[++y] = "";
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n = m;
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}
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tz[y] += j;
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}
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return tz;
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}
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var aa = chunkify(a.filename.toLowerCase());
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var bb = chunkify(b.filename.toLowerCase());
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for (x = 0; aa[x] && bb[x]; x++) {
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if (aa[x] !== bb[x]) {
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var c = Number(aa[x]), d = Number(bb[x]);
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if (c == aa[x] && d == bb[x]) {
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return c - d;
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} else return (aa[x] > bb[x]) ? 1 : -1;
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}
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}
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return aa.length - bb.length;
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}
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// ===========================================================================
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/**
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* archive.js
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*
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* Provides base functionality for unarchiving.
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*
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* Licensed under the MIT License
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*
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* Copyright(c) 2011 Google Inc.
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*/
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/* global bitjs, Uint8Array */
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var bitjs = bitjs || {};
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bitjs.archive = bitjs.archive || {};
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(function() {
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// ===========================================================================
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// Stolen from Closure because it's the best way to do Java-like inheritance.
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bitjs.base = function(me, optMethodName, varArgs) {
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var caller = arguments.callee.caller;
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if (caller.superClass_) {
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// This is a constructor. Call the superclass constructor.
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return caller.superClass_.constructor.apply(
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me, Array.prototype.slice.call(arguments, 1));
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}
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var args = Array.prototype.slice.call(arguments, 2);
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var foundCaller = false;
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for (var ctor = me.constructor; ctor; ctor = ctor.superClass_ && ctor.superClass_.constructor) {
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if (ctor.prototype[optMethodName] === caller) {
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foundCaller = true;
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} else if (foundCaller) {
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return ctor.prototype[optMethodName].apply(me, args);
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}
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}
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// If we did not find the caller in the prototype chain,
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// then one of two things happened:
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// 1) The caller is an instance method.
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// 2) This method was not called by the right caller.
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if (me[optMethodName] === caller) {
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return me.constructor.prototype[optMethodName].apply(me, args);
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} else {
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throw Error(
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"goog.base called from a method of one name " +
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"to a method of a different name");
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}
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};
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bitjs.inherits = function(childCtor, parentCtor) {
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/** @constructor */
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function TempCtor() {}
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TempCtor.prototype = parentCtor.prototype;
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childCtor.superClass_ = parentCtor.prototype;
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childCtor.prototype = new TempCtor();
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childCtor.prototype.constructor = childCtor;
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};
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// ===========================================================================
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/**
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* An unarchive event.
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*
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* @param {string} type The event type.
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* @constructor
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*/
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bitjs.archive.UnarchiveEvent = function(type) {
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/**
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* The event type.
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*
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* @type {string}
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*/
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this.type = type;
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};
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/**
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* The UnarchiveEvent types.
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*/
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bitjs.archive.UnarchiveEvent.Type = {
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START: "start",
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PROGRESS: "progress",
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EXTRACT: "extract",
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FINISH: "finish",
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INFO: "info",
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ERROR: "error"
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};
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/**
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* Useful for passing info up to the client (for debugging).
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*
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* @param {string} msg The info message.
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*/
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bitjs.archive.UnarchiveInfoEvent = function(msg) {
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bitjs.base(this, bitjs.archive.UnarchiveEvent.Type.INFO);
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/**
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* The information message.
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*
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* @type {string}
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*/
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this.msg = msg;
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};
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bitjs.inherits(bitjs.archive.UnarchiveInfoEvent, bitjs.archive.UnarchiveEvent);
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/**
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* An unrecoverable error has occured.
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*
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* @param {string} msg The error message.
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*/
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bitjs.archive.UnarchiveErrorEvent = function(msg) {
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bitjs.base(this, bitjs.archive.UnarchiveEvent.Type.ERROR);
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/**
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* The information message.
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*
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* @type {string}
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*/
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this.msg = msg;
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};
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bitjs.inherits(bitjs.archive.UnarchiveErrorEvent, bitjs.archive.UnarchiveEvent);
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/**
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* Start event.
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*
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* @param {string} msg The info message.
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*/
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bitjs.archive.UnarchiveStartEvent = function() {
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bitjs.base(this, bitjs.archive.UnarchiveEvent.Type.START);
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};
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bitjs.inherits(bitjs.archive.UnarchiveStartEvent, bitjs.archive.UnarchiveEvent);
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/**
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* Finish event.
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*
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* @param {string} msg The info message.
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*/
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bitjs.archive.UnarchiveFinishEvent = function() {
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bitjs.base(this, bitjs.archive.UnarchiveEvent.Type.FINISH);
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};
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bitjs.inherits(bitjs.archive.UnarchiveFinishEvent, bitjs.archive.UnarchiveEvent);
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/**
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* Progress event.
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*/
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bitjs.archive.UnarchiveProgressEvent = function(
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currentFilename,
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currentFileNumber,
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currentBytesUnarchivedInFile,
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currentBytesUnarchived,
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totalUncompressedBytesInArchive,
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totalFilesInArchive) {
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bitjs.base(this, bitjs.archive.UnarchiveEvent.Type.PROGRESS);
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this.currentFilename = currentFilename;
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this.currentFileNumber = currentFileNumber;
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this.currentBytesUnarchivedInFile = currentBytesUnarchivedInFile;
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this.totalFilesInArchive = totalFilesInArchive;
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this.currentBytesUnarchived = currentBytesUnarchived;
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this.totalUncompressedBytesInArchive = totalUncompressedBytesInArchive;
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};
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bitjs.inherits(bitjs.archive.UnarchiveProgressEvent, bitjs.archive.UnarchiveEvent);
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/**
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* All extracted files returned by an Unarchiver will implement
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* the following interface:
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*
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* interface UnarchivedFile {
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* string filename
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* TypedArray fileData
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* }
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*
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*/
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/**
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* Extract event.
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*/
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bitjs.archive.UnarchiveExtractEvent = function(unarchivedFile) {
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bitjs.base(this, bitjs.archive.UnarchiveEvent.Type.EXTRACT);
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/**
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* @type {UnarchivedFile}
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*/
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this.unarchivedFile = unarchivedFile;
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};
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bitjs.inherits(bitjs.archive.UnarchiveExtractEvent, bitjs.archive.UnarchiveEvent);
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/**
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* Base class for all Unarchivers.
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*
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* @param {ArrayBuffer} arrayBuffer The Array Buffer.
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* @param {string} optPathToBitJS Optional string for where the BitJS files are located.
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* @constructor
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*/
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bitjs.archive.Unarchiver = function(arrayBuffer, optPathToBitJS) {
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/**
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* The ArrayBuffer object.
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* @type {ArrayBuffer}
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* @protected
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*/
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this.ab = arrayBuffer;
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/**
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* The path to the BitJS files.
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* @type {string}
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* @private
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*/
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this.pathToBitJS_ = optPathToBitJS || "/";
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/**
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* A map from event type to an array of listeners.
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* @type {Map.<string, Array>}
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*/
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this.listeners_ = {};
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for (var type in bitjs.archive.UnarchiveEvent.Type) {
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this.listeners_[bitjs.archive.UnarchiveEvent.Type[type]] = [];
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}
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};
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/**
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* Private web worker initialized during start().
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* @type {Worker}
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* @private
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*/
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bitjs.archive.Unarchiver.prototype.worker_ = null;
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/**
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* This method must be overridden by the subclass to return the script filename.
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* @return {string} The script filename.
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* @protected.
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*/
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bitjs.archive.Unarchiver.prototype.getScriptFileName = function() {
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throw "Subclasses of AbstractUnarchiver must overload getScriptFileName()";
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};
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/**
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* Adds an event listener for UnarchiveEvents.
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*
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* @param {string} Event type.
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* @param {function} An event handler function.
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*/
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bitjs.archive.Unarchiver.prototype.addEventListener = function(type, listener) {
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if (type in this.listeners_) {
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if (this.listeners_[type].indexOf(listener) === -1) {
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this.listeners_[type].push(listener);
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}
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}
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};
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/**
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* Removes an event listener.
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*
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* @param {string} Event type.
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* @param {EventListener|function} An event listener or handler function.
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*/
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bitjs.archive.Unarchiver.prototype.removeEventListener = function(type, listener) {
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if (type in this.listeners_) {
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var index = this.listeners_[type].indexOf(listener);
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if (index !== -1) {
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this.listeners_[type].splice(index, 1);
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}
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}
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};
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/**
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* Receive an event and pass it to the listener functions.
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*
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* @param {bitjs.archive.UnarchiveEvent} e
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* @private
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*/
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bitjs.archive.Unarchiver.prototype.handleWorkerEvent_ = function(e) {
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if ((e instanceof bitjs.archive.UnarchiveEvent || e.type) &&
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this.listeners_[e.type] instanceof Array) {
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this.listeners_[e.type].forEach(function (listener) {
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listener(e);
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});
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if (e.type === bitjs.archive.UnarchiveEvent.Type.FINISH) {
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this.worker_.terminate();
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}
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}
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};
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/**
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* Starts the unarchive in a separate Web Worker thread and returns immediately.
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*/
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bitjs.archive.Unarchiver.prototype.start = function() {
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var me = this;
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var scriptFileName = this.pathToBitJS_ + this.getScriptFileName();
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if (scriptFileName) {
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this.worker_ = new Worker(scriptFileName);
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this.worker_.onerror = function(e) {
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throw e;
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};
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this.worker_.onmessage = function(e) {
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if (typeof e.data !== "string") {
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// Assume that it is an UnarchiveEvent. Some browsers preserve the 'type'
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// so that instanceof UnarchiveEvent returns true, but others do not.
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me.handleWorkerEvent_(e.data);
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}
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};
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this.worker_.postMessage({file: this.ab});
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}
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};
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/**
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* Terminates the Web Worker for this Unarchiver and returns immediately.
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*/
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bitjs.archive.Unarchiver.prototype.stop = function() {
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if (this.worker_) {
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this.worker_.terminate();
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}
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};
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/**
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* Unzipper
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* @extends {bitjs.archive.Unarchiver}
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* @constructor
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*/
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bitjs.archive.Unzipper = function(arrayBuffer, optPathToBitJS) {
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bitjs.base(this, arrayBuffer, optPathToBitJS);
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};
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bitjs.inherits(bitjs.archive.Unzipper, bitjs.archive.Unarchiver);
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bitjs.archive.Unzipper.prototype.getScriptFileName = function() {
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return "unzip.js";
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};
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/**
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* Unrarrer
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* @extends {bitjs.archive.Unarchiver}
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* @constructor
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*/
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bitjs.archive.Unrarrer = function(arrayBuffer, optPathToBitJS) {
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bitjs.base(this, arrayBuffer, optPathToBitJS);
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};
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bitjs.inherits(bitjs.archive.Unrarrer, bitjs.archive.Unarchiver);
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bitjs.archive.Unrarrer.prototype.getScriptFileName = function() {
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return "unrar.js";
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};
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/**
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* Untarrer
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* @extends {bitjs.archive.Unarchiver}
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* @constructor
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*/
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bitjs.archive.Untarrer = function(arrayBuffer, optPathToBitJS) {
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bitjs.base(this, arrayBuffer, optPathToBitJS);
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};
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bitjs.inherits(bitjs.archive.Untarrer, bitjs.archive.Unarchiver);
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bitjs.archive.Untarrer.prototype.getScriptFileName = function() {
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return "untar.js";
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};
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/**
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* Factory method that creates an unarchiver based on the byte signature found
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* in the arrayBuffer.
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* @param {ArrayBuffer} ab
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* @param {string=} optPathToBitJS Path to the unarchiver script files.
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* @return {bitjs.archive.Unarchiver}
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*/
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bitjs.archive.GetUnarchiver = function(ab, optPathToBitJS) {
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var unarchiver = null;
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var pathToBitJS = optPathToBitJS || "";
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var h = new Uint8Array(ab, 0, 10);
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if (h[0] === 0x52 && h[1] === 0x61 && h[2] === 0x72 && h[3] === 0x21) { // Rar!
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unarchiver = new bitjs.archive.Unrarrer(ab, pathToBitJS);
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} else if (h[0] === 80 && h[1] === 75) { // PK (Zip)
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unarchiver = new bitjs.archive.Unzipper(ab, pathToBitJS);
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} else { // Try with tar
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unarchiver = new bitjs.archive.Untarrer(ab, pathToBitJS);
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}
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return unarchiver;
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};
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})();
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