489 lines
12 KiB
JavaScript
489 lines
12 KiB
JavaScript
/*
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***** BEGIN LICENSE BLOCK *****
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Copyright © 2009 Center for History and New Media
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George Mason University, Fairfax, Virginia, USA
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http://zotero.org
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This file is part of Zotero.
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Zotero is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Zotero is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with Zotero. If not, see <http://www.gnu.org/licenses/>.
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Utilities based in part on code taken from Piggy Bank 2.1.1 (BSD-licensed)
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***** END LICENSE BLOCK *****
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*/
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/**
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* @class Utility functions not made available to translators
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*/
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Zotero.Utilities.Internal = {
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/*
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* Adapted from http://developer.mozilla.org/en/docs/nsICryptoHash
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*
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* @param {String|nsIFile} strOrFile
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* @param {Boolean} [base64=false] Return as base-64-encoded string rather than hex string
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* @return {String}
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*/
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"md5":function(strOrFile, base64) {
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if (typeof strOrFile == 'string') {
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var converter = Components.classes["@mozilla.org/intl/scriptableunicodeconverter"].
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createInstance(Components.interfaces.nsIScriptableUnicodeConverter);
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converter.charset = "UTF-8";
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var result = {};
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var data = converter.convertToByteArray(strOrFile, result);
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var ch = Components.classes["@mozilla.org/security/hash;1"]
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.createInstance(Components.interfaces.nsICryptoHash);
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ch.init(ch.MD5);
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ch.update(data, data.length);
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}
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else if (strOrFile instanceof Components.interfaces.nsIFile) {
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// Otherwise throws (NS_ERROR_NOT_AVAILABLE) [nsICryptoHash.updateFromStream]
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if (!strOrFile.fileSize) {
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// MD5 for empty string
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return "d41d8cd98f00b204e9800998ecf8427e";
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}
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var istream = Components.classes["@mozilla.org/network/file-input-stream;1"]
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.createInstance(Components.interfaces.nsIFileInputStream);
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// open for reading
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istream.init(strOrFile, 0x01, 0444, 0);
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var ch = Components.classes["@mozilla.org/security/hash;1"]
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.createInstance(Components.interfaces.nsICryptoHash);
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// we want to use the MD5 algorithm
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ch.init(ch.MD5);
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// this tells updateFromStream to read the entire file
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const PR_UINT32_MAX = 0xffffffff;
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ch.updateFromStream(istream, PR_UINT32_MAX);
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}
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// pass false here to get binary data back
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var hash = ch.finish(base64);
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if (istream) {
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istream.close();
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}
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if (base64) {
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return hash;
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}
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// return the two-digit hexadecimal code for a byte
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function toHexString(charCode) {
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return ("0" + charCode.toString(16)).slice(-2);
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}
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// convert the binary hash data to a hex string.
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return [toHexString(hash.charCodeAt(i)) for (i in hash)].join("");
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},
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/**
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* @param {OS.File|nsIFile|String} file File or file path
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* @param {Boolean} [base64=FALSE] Return as base-64-encoded string
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* rather than hex string
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*/
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"md5Async": function (file, base64) {
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Components.utils.import("resource://gre/modules/osfile.jsm");
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const CHUNK_SIZE = 16384;
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var deferred = Q.defer();
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function toHexString(charCode) {
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return ("0" + charCode.toString(16)).slice(-2);
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}
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var ch = Components.classes["@mozilla.org/security/hash;1"]
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.createInstance(Components.interfaces.nsICryptoHash);
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ch.init(ch.MD5);
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// Recursively read chunks of the file, and resolve the promise
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// with the hash when done
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let readChunk = function readChunk(file) {
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file.read(CHUNK_SIZE)
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.then(
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function readSuccess(data) {
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ch.update(data, data.length);
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if (data.length == CHUNK_SIZE) {
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readChunk(file);
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}
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else {
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let hash = ch.finish(base64);
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// Base64
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if (base64) {
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deferred.resolve(hash);
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}
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// Hex string
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else {
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deferred.resolve(
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[toHexString(hash.charCodeAt(i))
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for (i in hash)].join("")
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);
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}
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}
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},
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function (e) {
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try {
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ch.finish(false);
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}
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catch (e) {}
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deferred.reject(e);
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}
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)
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.then(
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null,
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function (e) {
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try {
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ch.finish(false);
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}
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catch (e) {}
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deferred.reject(e);
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}
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);
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}
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if (file instanceof OS.File) {
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readChunk(file);
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}
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else {
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if (file instanceof Components.interfaces.nsIFile) {
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var path = file.path;
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}
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else {
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var path = file;
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}
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OS.File.open(path)
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.then(
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function opened(file) {
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readChunk(file);
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},
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function (e) {
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deferred.reject(e);
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}
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);
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}
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return deferred.promise;
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},
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/**
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* Unicode normalization
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*/
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"normalize":function(str) {
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var normalizer = Components.classes["@mozilla.org/intl/unicodenormalizer;1"]
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.getService(Components.interfaces.nsIUnicodeNormalizer);
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var obj = {};
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str = normalizer.NormalizeUnicodeNFC(str, obj);
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return obj.value;
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},
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/**
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* Return the byte length of a UTF-8 string
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*
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* http://stackoverflow.com/a/23329386
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*/
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byteLength: function (str) {
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var s = str.length;
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for (var i=str.length-1; i>=0; i--) {
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var code = str.charCodeAt(i);
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if (code > 0x7f && code <= 0x7ff) s++;
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else if (code > 0x7ff && code <= 0xffff) s+=2;
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if (code >= 0xDC00 && code <= 0xDFFF) i--; //trail surrogate
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}
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return s;
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},
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/**
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* Display a prompt from an error with custom buttons and a callback
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*/
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"errorPrompt":function(title, e) {
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var ps = Components.classes["@mozilla.org/embedcomp/prompt-service;1"]
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.getService(Components.interfaces.nsIPromptService);
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var message, buttonText, buttonCallback;
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if (e.data) {
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if (e.data.dialogText) {
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message = e.data.dialogText;
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}
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if (typeof e.data.dialogButtonText != 'undefined') {
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buttonText = e.data.dialogButtonText;
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buttonCallback = e.data.dialogButtonCallback;
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}
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}
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if (!message) {
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if (e.message) {
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message = e.message;
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}
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else {
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message = e;
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}
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}
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if (typeof buttonText == 'undefined') {
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buttonText = Zotero.getString('errorReport.reportError');
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buttonCallback = function () {
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win.ZoteroPane.reportErrors();
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}
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}
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// If secondary button is explicitly null, just use an alert
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else if (buttonText === null) {
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ps.alert(null, title, message);
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return;
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}
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var buttonFlags = ps.BUTTON_POS_0 * ps.BUTTON_TITLE_OK
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+ ps.BUTTON_POS_1 * ps.BUTTON_TITLE_IS_STRING;
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var index = ps.confirmEx(
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null,
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title,
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message,
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buttonFlags,
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"",
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buttonText,
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"", null, {}
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);
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if (index == 1) {
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setTimeout(function () { buttonCallback(); }, 1);
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}
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},
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/**
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* Launch a process
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* @param {nsIFile} cmd Path to command to launch
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* @param {String[]} args Arguments given
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* @return {Promise} Promise resolved to true if command succeeds, or an error otherwise
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*/
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"exec":function(cmd, args) {
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if(!cmd.isExecutable()) {
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return Q.reject(cmd.path+" is not an executable");
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}
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var proc = Components.classes["@mozilla.org/process/util;1"].
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createInstance(Components.interfaces.nsIProcess);
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proc.init(cmd);
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var deferred = Q.defer();
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proc.runwAsync(args, args.length, {"observe":function(subject, topic) {
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if(topic !== "process-finished") {
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deferred.reject(new Error(cmd.path+" failed"));
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} else if(proc.exitValue != 0) {
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deferred.reject(new Error(cmd.path+" returned exit status "+proc.exitValue));
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} else {
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deferred.resolve(true);
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}
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}});
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return deferred.promise;
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},
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/**
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* Get string data from the clipboard
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* @param {String[]} mimeType MIME type of data to get
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* @return {String|null} Clipboard data, or null if none was available
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*/
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"getClipboard":function(mimeType) {
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var clip = Services.clipboard;
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if (!clip.hasDataMatchingFlavors([mimeType], 1, clip.kGlobalClipboard)) {
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return null;
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}
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var trans = Components.classes["@mozilla.org/widget/transferable;1"]
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.createInstance(Components.interfaces.nsITransferable);
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trans.addDataFlavor(mimeType);
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clip.getData(trans, clip.kGlobalClipboard);
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var str = {};
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try {
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trans.getTransferData(mimeType, str, {});
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str = str.value.QueryInterface(Components.interfaces.nsISupportsString).data;
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}
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catch (e) {
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return null;
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}
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return str;
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},
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/**
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* Determine if one Window is a descendant of another Window
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* @param {DOMWindow} suspected child window
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* @param {DOMWindow} suspected parent window
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* @return {boolean}
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*/
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"isIframeOf":function isIframeOf(childWindow, parentWindow) {
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while(childWindow.parent !== childWindow) {
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childWindow = childWindow.parent;
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if(childWindow === parentWindow) return true;
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}
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}
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}
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/**
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* Base64 encode / decode
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* From http://www.webtoolkit.info/
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*/
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Zotero.Utilities.Internal.Base64 = {
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// private property
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_keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
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// public method for encoding
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encode : function (input) {
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var output = "";
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var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
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var i = 0;
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input = this._utf8_encode(input);
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while (i < input.length) {
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chr1 = input.charCodeAt(i++);
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chr2 = input.charCodeAt(i++);
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chr3 = input.charCodeAt(i++);
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enc1 = chr1 >> 2;
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enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
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enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
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enc4 = chr3 & 63;
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if (isNaN(chr2)) {
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enc3 = enc4 = 64;
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} else if (isNaN(chr3)) {
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enc4 = 64;
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}
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output = output +
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this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
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this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
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}
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return output;
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},
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// public method for decoding
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decode : function (input) {
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var output = "";
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var chr1, chr2, chr3;
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var enc1, enc2, enc3, enc4;
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var i = 0;
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input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
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while (i < input.length) {
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enc1 = this._keyStr.indexOf(input.charAt(i++));
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enc2 = this._keyStr.indexOf(input.charAt(i++));
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enc3 = this._keyStr.indexOf(input.charAt(i++));
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enc4 = this._keyStr.indexOf(input.charAt(i++));
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chr1 = (enc1 << 2) | (enc2 >> 4);
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chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
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chr3 = ((enc3 & 3) << 6) | enc4;
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output = output + String.fromCharCode(chr1);
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if (enc3 != 64) {
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output = output + String.fromCharCode(chr2);
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}
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if (enc4 != 64) {
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output = output + String.fromCharCode(chr3);
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}
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}
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output = this._utf8_decode(output);
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return output;
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},
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// private method for UTF-8 encoding
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_utf8_encode : function (string) {
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string = string.replace(/\r\n/g,"\n");
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var utftext = "";
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for (var n = 0; n < string.length; n++) {
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var c = string.charCodeAt(n);
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if (c < 128) {
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utftext += String.fromCharCode(c);
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}
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else if((c > 127) && (c < 2048)) {
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utftext += String.fromCharCode((c >> 6) | 192);
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utftext += String.fromCharCode((c & 63) | 128);
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}
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else {
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utftext += String.fromCharCode((c >> 12) | 224);
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utftext += String.fromCharCode(((c >> 6) & 63) | 128);
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utftext += String.fromCharCode((c & 63) | 128);
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}
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}
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return utftext;
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},
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// private method for UTF-8 decoding
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_utf8_decode : function (utftext) {
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var string = "";
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var i = 0;
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var c = c1 = c2 = 0;
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while ( i < utftext.length ) {
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c = utftext.charCodeAt(i);
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if (c < 128) {
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string += String.fromCharCode(c);
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i++;
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}
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else if((c > 191) && (c < 224)) {
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c2 = utftext.charCodeAt(i+1);
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string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
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i += 2;
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}
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else {
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c2 = utftext.charCodeAt(i+1);
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c3 = utftext.charCodeAt(i+2);
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string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
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i += 3;
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}
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}
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return string;
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},
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/**
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* saveURI wrapper function
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* @param {nsIWebBrowserPersist} nsIWebBrowserPersist
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* @param {nsIURI} source URL
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* @param {nsISupports} target file
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*/
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saveURI: function (wbp, source, target) {
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// Firefox 35 and below
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try {
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wbp.saveURI(source, null, null, null, null, target, null);
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}
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// Firefox 36+ needs one more parameter
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catch (e if e.name === "NS_ERROR_XPC_NOT_ENOUGH_ARGS") {
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wbp.saveURI(source, null, null, null, null, null, target, null);
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}
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}
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} |