Side by Side Diff: lib/localstorage/io.js
Issue 5923900886089728:
Use FileSystem API to store data in Opera (Closed)
Patch Set:
Created Nov. 25, 2013, 7:39 a.m.
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| 1 /* | |
| 2 * This file is part of Adblock Plus <http://adblockplus.org/>, | |
| 3 * Copyright (C) 2006-2013 Eyeo GmbH | |
| 4 * | |
| 5 * Adblock Plus is free software: you can redistribute it and/or modify | |
| 6 * it under the terms of the GNU General Public License version 3 as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * Adblock Plus is distributed in the hope that it will be useful, | |
| 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 * GNU General Public License for more details. | |
| 13 * | |
| 14 * You should have received a copy of the GNU General Public License | |
| 15 * along with Adblock Plus. If not, see <http://www.gnu.org/licenses/>. | |
| 16 */ | |
| 17 | |
| 18 // | |
| 19 // No direct file system access, using LocalStorage API | |
| 20 // | |
| 21 | |
| 22 var IO = exports.IO = | |
| 23 { | |
| 24 _getFilePath: function(file) | |
| 25 { | |
| 26 if (file instanceof FakeFile) | |
| 27 return file.path; | |
| 28 else if ("spec" in file) | |
| 29 return file.spec; | |
| 30 | |
| 31 throw new Error("Unexpected file type"); | |
| 32 }, | |
| 33 | |
| 34 _setFileContents: function(path, contents, lastModified) | |
| 35 { | |
| 36 window.localStorage[path] = contents; | |
| 37 window.localStorage[path + "/lastModified"] = lastModified || 0; | |
| 38 }, | |
| 39 | |
| 40 lineBreak: "\n", | |
| 41 | |
| 42 resolveFilePath: function(path) | |
| 43 { | |
| 44 return new FakeFile(path); | |
| 45 }, | |
| 46 | |
| 47 readFromFile: function(file, decode, listener, callback, timeLineID) | |
| 48 { | |
| 49 var Utils = require("utils").Utils; | |
| 50 Utils.runAsync(function() | |
| 51 { | |
| 52 if ("spec" in file && /^defaults\b/.test(file.spec)) | |
| 53 { | |
| 54 // Code attempts to read the default patterns.ini, we don't have that. | |
| 55 // Make sure to execute first-run actions instead. | |
| 56 if (localStorage.currentVersion) | |
| 57 seenDataCorruption = true; | |
| 58 delete localStorage.currentVersion; | |
| 59 callback(null); | |
| 60 return; | |
| 61 } | |
| 62 | |
| 63 var path = this._getFilePath(file); | |
| 64 if (!(path in window.localStorage)) | |
| 65 { | |
| 66 callback(new Error("File doesn't exist")) | |
| 67 return; | |
| 68 } | |
| 69 | |
| 70 var lines = window.localStorage[path].split(/[\r\n]+/); | |
| 71 for (var i = 0; i < lines.length; i++) | |
| 72 listener.process(lines[i]); | |
| 73 listener.process(null); | |
| 74 callback(null); | |
| 75 }.bind(this)); | |
| 76 }, | |
| 77 | |
| 78 writeToFile: function(file, encode, data, callback, timeLineID) | |
| 79 { | |
| 80 var path = this._getFilePath(file); | |
| 81 this._setFileContents(path, data.join(this.lineBreak) + this.lineBreak, Date .now()); | |
| 82 | |
| 83 var Utils = require("utils").Utils; | |
| 84 Utils.runAsync(callback, null, null); | |
| 85 }, | |
| 86 | |
| 87 copyFile: function(fromFile, toFile, callback) | |
| 88 { | |
| 89 // Simply combine read and write operations | |
| 90 var data = []; | |
| 91 this.readFromFile(fromFile, false, { | |
| 92 process: function(line) | |
| 93 { | |
| 94 if (line !== null) | |
| 95 data.push(line); | |
| 96 } | |
| 97 }, function(e) | |
| 98 { | |
| 99 if (e) | |
| 100 callback(e); | |
| 101 else | |
| 102 this.writeToFile(toFile, false, data, callback); | |
| 103 }.bind(this)); | |
| 104 }, | |
| 105 | |
| 106 renameFile: function(fromFile, newName, callback) | |
| 107 { | |
| 108 var path = this._getFilePath(fromFile); | |
| 109 if (!(path in window.localStorage)) | |
| 110 { | |
| 111 callback(new Error("File doesn't exist")) | |
| 112 return; | |
| 113 } | |
| 114 | |
| 115 this._setFileContents(newName, window.localStorage[path], window.localStorag e[path + "/lastModified"]); | |
| 116 this.removeFile(fromFile, callback); | |
| 117 }, | |
| 118 | |
| 119 removeFile: function(file, callback) | |
| 120 { | |
| 121 var path = this._getFilePath(file); | |
| 122 delete window.localStorage[path]; | |
| 123 delete window.localStorage[path + "/lastModified"]; | |
| 124 callback(null); | |
| 125 }, | |
| 126 | |
| 127 statFile: function(file, callback) | |
| 128 { | |
| 129 var path = this._getFilePath(file); | |
| 130 callback(null, { | |
| 131 exists: path in window.localStorage, | |
| 132 isDirectory: false, | |
| 133 isFile: true, | |
| 134 lastModified: parseInt(window.localStorage[path + "/lastModified"], 10) || 0 | |
| 135 }); | |
| 136 } | |
| 137 }; | |
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