// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
var expectedText = 'def';
function truncateAndWriteToFile(writableEntry, callback) {
writableEntry.createWriter(function(fileWriter) {
fileWriter.onerror = function(e) {
console.error("Couldn't write file: " + e.toString());
};
fileWriter.onwriteend = function(e) {
fileWriter.onwriteend = function(e) {
callback();
};
var blob = new Blob([expectedText], {type: 'text/plain'});
fileWriter.write(blob);
};
fileWriter.truncate(0);
});
}
chrome.app.runtime.onLaunched.addListener(function() {
chrome.app.window.create('index.html', {width: 100, height: 100},
function(win) {
var fs = win.contentWindow.chrome.fileSystem;
fs.chooseEntry({type: 'openFile'}, function(entry) {
fs.getWritableEntry(entry, function(writableEntry) {
var id = fs.retainEntry(entry);
chrome.storage.local.set({id:id}, function() {
truncateAndWriteToFile(writableEntry, function() {
chrome.test.sendMessage('fileWritten');
win.close();
});
});
});
});
});
});
chrome.app.runtime.onRestarted.addListener(function() {
chrome.storage.local.get(null, function(data) {
chrome.fileSystem.restoreEntry(data.id, function(entry) {
if (!entry) {
console.error("couldn't get file entry " + data.id);
return;
}
entry.file(function(file) {
var fr = new FileReader();
fr.onload = function(e) {
if (e.target.result != expectedText) {
console.error("expected '" + expectedText + "', got '" +
e.target.result + "'");
return;
}
entry.createWriter(function(fileWriter) {
fileWriter.onwriteend = function(e) {
chrome.test.sendMessage('restartedFileAccessOK');
win.close();
};
fileWriter.onerror = function(e) {
console.error('Write failed: ' + e.toString());
};
var blob = new Blob(["doesn't matter"], {type: 'text/plain'});
fileWriter.write(blob);
});
};
fr.onerror = function(e) {
chrome.test.fail("error reading file");
};
fr.readAsText(file);
});
});
});
});