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/*
* Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
*/
/*jslint vars: true, plusplus: true, devel: true, nomen: true, regexp: true, indent: 4, maxerr: 50 */
/*global define */
/**
* Represents a file that will never exist on disk - a placeholder backing file for untitled Documents. NO ONE
* other than DocumentManager should create instances of InMemoryFile. It is valid to test for one (`instanceof
* InMemoryFile`), but it's better to check `doc.isUntitled` where possible.
*
* Attempts to read/write an InMemoryFile will always fail, and exists() always yields false. InMemoryFile.fullPath
* is just a placeholder, and should not be displayed anywhere in the UI; fullPath IS guaranteed to be unique, however.
*
* An InMemoryFile is not added to the filesystem index, so if you ask the the filesystem anything about this
* object, it won't know what you're talking about (`filesystem.getFileForPath(someInMemFile.fullPath)` will not
* return someInMemFile).
*/
define(function (require, exports, module) {
"use strict";
var File = require("filesystem/File"),
FileSystemError = require("filesystem/FileSystemError");
function InMemoryFile(fullPath, fileSystem) {
File.call(this, fullPath, fileSystem);
}
InMemoryFile.prototype = Object.create(File.prototype);
InMemoryFile.prototype.constructor = InMemoryFile;
InMemoryFile.prototype.parentClass = File.prototype;
// Stub out invalid calls inherited from File
/**
* Reject any attempts to read the file.
*
* Read a file as text.
*
* @param {Object=} options Currently unused.
* @param {function (number, string, object)} callback
*/
InMemoryFile.prototype.read = function (options, callback) {
if (typeof (options) === "function") {
callback = options;
}
callback(FileSystemError.NOT_FOUND);
};
/**
* Rejects any attempts to write the file.
*
* @param {string} data Data to write.
* @param {string=} encoding Encoding for data. Defaults to UTF-8.
* @param {!function (err, object)} callback Callback that is passed the
* error code and the file's new stats if the write is sucessful.
*/
InMemoryFile.prototype.write = function (data, encoding, callback) {
if (typeof (encoding) === "function") {
callback = encoding;
}
callback(FileSystemError.NOT_FOUND);
};
// Stub out invalid calls inherited from FileSystemEntry
InMemoryFile.prototype.exists = function (callback) {
callback(null, false);
};
InMemoryFile.prototype.stat = function (callback) {
callback(FileSystemError.NOT_FOUND);
};
InMemoryFile.prototype.unlink = function (callback) {
callback(FileSystemError.NOT_FOUND);
};
InMemoryFile.prototype.rename = function (newName, callback) {
callback(FileSystemError.NOT_FOUND);
};
InMemoryFile.prototype.moveToTrash = function (callback) {
callback(FileSystemError.NOT_FOUND);
};
// Export this class
module.exports = InMemoryFile;
});