strong-arc
Version:
A visual suite for the StrongLoop API Platform
361 lines (329 loc) • 10.3 kB
JavaScript
/*
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
window.requestFileSystem = window.requestFileSystem || window.webkitRequestFileSystem;
/**
* @constructor
* @param {!string} dirPath
* @param {!string} name
* @param {!function(?WebInspector.TempFile)} callback
*/
WebInspector.TempFile = function(dirPath, name, callback)
{
this._fileEntry = null;
this._writer = null;
/**
* @param {!FileSystem} fs
* @this {WebInspector.TempFile}
*/
function didInitFs(fs)
{
fs.root.getDirectory(dirPath, { create: true }, didGetDir.bind(this), errorHandler);
}
/**
* @param {!DirectoryEntry} dir
* @this {WebInspector.TempFile}
*/
function didGetDir(dir)
{
dir.getFile(name, { create: true }, didCreateFile.bind(this), errorHandler);
}
/**
* @param {!FileEntry} fileEntry
* @this {WebInspector.TempFile}
*/
function didCreateFile(fileEntry)
{
this._fileEntry = fileEntry;
fileEntry.createWriter(didCreateWriter.bind(this), errorHandler);
}
/**
* @param {!FileWriter} writer
* @this {WebInspector.TempFile}
*/
function didCreateWriter(writer)
{
/**
* @this {WebInspector.TempFile}
*/
function didTruncate(e)
{
this._writer = writer;
writer.onwrite = null;
writer.onerror = null;
callback(this);
}
function onTruncateError(e)
{
WebInspector.console.error("Failed to truncate temp file " + e.code + " : " + e.message);
callback(null);
}
if (writer.length) {
writer.onwrite = didTruncate.bind(this);
writer.onerror = onTruncateError;
writer.truncate(0);
} else {
this._writer = writer;
callback(this);
}
}
function errorHandler(e)
{
WebInspector.console.error("Failed to create temp file " + e.code + " : " + e.message);
callback(null);
}
/**
* @this {WebInspector.TempFile}
*/
function didClearTempStorage()
{
window.requestFileSystem(window.TEMPORARY, 10, didInitFs.bind(this), errorHandler);
}
WebInspector.TempFile._ensureTempStorageCleared(didClearTempStorage.bind(this));
}
WebInspector.TempFile.prototype = {
/**
* @param {!string} data
* @param {!function(boolean)} callback
*/
write: function(data, callback)
{
var blob = new Blob([data], {type: 'text/plain'});
this._writer.onerror = function(e)
{
WebInspector.console.error("Failed to write into a temp file: " + e.message);
callback(false);
}
this._writer.onwrite = function(e)
{
callback(true);
}
this._writer.write(blob);
},
finishWriting: function()
{
this._writer = null;
},
/**
* @param {function(?string)} callback
*/
read: function(callback)
{
/**
* @param {!File} file
*/
function didGetFile(file)
{
var reader = new FileReader();
/**
* @this {FileReader}
*/
reader.onloadend = function(e)
{
callback(/** @type {?string} */ (this.result));
}
reader.onerror = function(error)
{
WebInspector.console.error("Failed to read from temp file: " + error.message);
}
reader.readAsText(file);
}
function didFailToGetFile(error)
{
WebInspector.console.error("Failed to load temp file: " + error.message);
callback(null);
}
this._fileEntry.file(didGetFile, didFailToGetFile);
},
/**
* @param {!WebInspector.OutputStream} outputStream
* @param {!WebInspector.OutputStreamDelegate} delegate
*/
writeToOutputSteam: function(outputStream, delegate)
{
/**
* @param {!File} file
*/
function didGetFile(file)
{
var reader = new WebInspector.ChunkedFileReader(file, 10*1000*1000, delegate);
reader.start(outputStream);
}
function didFailToGetFile(error)
{
WebInspector.console.error("Failed to load temp file: " + error.message);
outputStream.close();
}
this._fileEntry.file(didGetFile, didFailToGetFile);
},
remove: function()
{
if (this._fileEntry)
this._fileEntry.remove(function() {});
}
}
/**
* @constructor
* @param {!string} dirPath
* @param {!string} name
*/
WebInspector.BufferedTempFileWriter = function(dirPath, name)
{
this._chunks = [];
this._tempFile = null;
this._isWriting = false;
this._finishCallback = null;
this._isFinished = false;
new WebInspector.TempFile(dirPath, name, this._didCreateTempFile.bind(this));
}
WebInspector.BufferedTempFileWriter.prototype = {
/**
* @param {!string} data
*/
write: function(data)
{
if (!this._chunks)
return;
if (this._finishCallback)
throw new Error("No writes are allowed after close.");
this._chunks.push(data);
if (this._tempFile && !this._isWriting)
this._writeNextChunk();
},
/**
* @param {!function(?WebInspector.TempFile)} callback
*/
close: function(callback)
{
this._finishCallback = callback;
if (this._isFinished)
callback(this._tempFile);
else if (!this._isWriting && !this._chunks.length)
this._notifyFinished();
},
_didCreateTempFile: function(tempFile)
{
this._tempFile = tempFile;
if (!tempFile) {
this._chunks = null;
this._notifyFinished();
return;
}
if (this._chunks.length)
this._writeNextChunk();
},
_writeNextChunk: function()
{
var chunkSize = 0;
var endIndex = 0;
for (; endIndex < this._chunks.length; endIndex++) {
chunkSize += this._chunks[endIndex].length;
if (chunkSize > 10 * 1000 * 1000)
break;
}
var chunk = this._chunks.slice(0, endIndex + 1).join("");
this._chunks.splice(0, endIndex + 1);
this._isWriting = true;
this._tempFile.write(chunk, this._didWriteChunk.bind(this));
},
_didWriteChunk: function(success)
{
this._isWriting = false;
if (!success) {
this._tempFile = null;
this._chunks = null;
this._notifyFinished();
return;
}
if (this._chunks.length)
this._writeNextChunk();
else if (this._finishCallback)
this._notifyFinished();
},
_notifyFinished: function()
{
this._isFinished = true;
if (this._tempFile)
this._tempFile.finishWriting();
if (this._finishCallback)
this._finishCallback(this._tempFile);
}
}
/**
* @constructor
*/
WebInspector.TempStorageCleaner = function()
{
this._worker = Runtime.startSharedWorker("temp_storage_shared_worker", "TempStorage");
this._worker.onerror = this._handleError.bind(this);
this._callbacks = [];
this._worker.port.onmessage = this._handleMessage.bind(this);
this._worker.port.onerror = this._handleError.bind(this);
}
WebInspector.TempStorageCleaner.prototype = {
/**
* @param {!function()} callback
*/
ensureStorageCleared: function(callback)
{
if (this._callbacks)
this._callbacks.push(callback);
else
callback();
},
_handleMessage: function(event)
{
if (event.data.type === "tempStorageCleared") {
if (event.data.error)
WebInspector.console.error(event.data.error);
this._notifyCallbacks();
}
},
_handleError: function(event)
{
WebInspector.console.error(WebInspector.UIString("Failed to clear temp storage: %s", event.data));
this._notifyCallbacks();
},
_notifyCallbacks: function()
{
var callbacks = this._callbacks;
this._callbacks = null;
for (var i = 0; i < callbacks.length; i++)
callbacks[i]();
}
}
/**
* @param {!function()} callback
*/
WebInspector.TempFile._ensureTempStorageCleared = function(callback)
{
if (!WebInspector.TempFile._storageCleaner)
WebInspector.TempFile._storageCleaner = new WebInspector.TempStorageCleaner();
WebInspector.TempFile._storageCleaner.ensureStorageCleared(callback);
}