monaca-lib
Version:
Monaca cloud API bindings for JavaScript
440 lines (402 loc) • 12.7 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
*/
WebInspector.TempFile = function()
{
this._fileEntry = null;
this._writer = null;
}
/**
* @param {string} dirPath
* @param {string} name
* @return {!Promise.<!WebInspector.TempFile>}
*/
WebInspector.TempFile.create = function(dirPath, name)
{
var file = new WebInspector.TempFile();
function requestTempFileSystem()
{
return new Promise(window.requestFileSystem.bind(window, window.TEMPORARY, 10));
}
/**
* @param {!FileSystem} fs
*/
function getDirectoryEntry(fs)
{
return new Promise(fs.root.getDirectory.bind(fs.root, dirPath, { create: true }));
}
/**
* @param {!DirectoryEntry} dir
*/
function getFileEntry(dir)
{
return new Promise(dir.getFile.bind(dir, name, { create: true }));
}
/**
* @param {!FileEntry} fileEntry
*/
function createFileWriter(fileEntry)
{
file._fileEntry = fileEntry;
return new Promise(fileEntry.createWriter.bind(fileEntry));
}
/**
* @param {!FileWriter} writer
*/
function truncateFile(writer)
{
if (!writer.length) {
file._writer = writer;
return Promise.resolve(file);
}
/**
* @param {function(?)} fulfill
* @param {function(*)} reject
*/
function truncate(fulfill, reject)
{
writer.onwriteend = fulfill;
writer.onerror = reject;
writer.truncate(0);
}
function didTruncate()
{
file._writer = writer;
writer.onwriteend = null;
writer.onerror = null;
return Promise.resolve(file);
}
function onTruncateError(e)
{
writer.onwriteend = null;
writer.onerror = null;
throw e;
}
return new Promise(truncate).then(didTruncate, onTruncateError);
}
return WebInspector.TempFile.ensureTempStorageCleared()
.then(requestTempFileSystem)
.then(getDirectoryEntry)
.then(getFileEntry)
.then(createFileWriter)
.then(truncateFile);
}
WebInspector.TempFile.prototype = {
/**
* @param {!Array.<string>} strings
* @param {function(number)} callback
*/
write: function(strings, callback)
{
var blob = new Blob(strings, {type: 'text/plain'});
this._writer.onerror = function(e)
{
WebInspector.console.error("Failed to write into a temp file: " + e.target.error.message);
callback(-1);
}
this._writer.onwriteend = function(e)
{
callback(e.target.length);
}
this._writer.write(blob);
},
finishWriting: function()
{
this._writer = null;
},
/**
* @param {function(?string)} callback
*/
read: function(callback)
{
this.readRange(undefined, undefined, callback);
},
/**
* @param {number|undefined} startOffset
* @param {number|undefined} endOffset
* @param {function(?string)} callback
*/
readRange: function(startOffset, endOffset, callback)
{
/**
* @param {!Blob} file
*/
function didGetFile(file)
{
var reader = new FileReader();
if (typeof startOffset === "number" || typeof endOffset === "number")
file = file.slice(/** @type {number} */ (startOffset), /** @type {number} */ (endOffset));
/**
* @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.DeferredTempFile = function(dirPath, name)
{
/** @type {!Array.<!{strings: !Array.<string>, callback: function(number)}>} */
this._chunks = [];
this._tempFile = null;
this._isWriting = false;
this._finishCallback = null;
this._finishedWriting = false;
this._callsPendingOpen = [];
this._pendingReads = [];
WebInspector.TempFile.create(dirPath, name)
.then(this._didCreateTempFile.bind(this), this._failedToCreateTempFile.bind(this));
}
WebInspector.DeferredTempFile.prototype = {
/**
* @param {!Array.<string>} strings
* @param {function(number)=} callback
*/
write: function(strings, callback)
{
if (!this._chunks)
return;
if (this._finishCallback)
throw new Error("No writes are allowed after close.");
this._chunks.push({strings: strings, callback: callback});
if (this._tempFile && !this._isWriting)
this._writeNextChunk();
},
/**
* @param {function(?WebInspector.TempFile)} callback
*/
finishWriting: function(callback)
{
this._finishCallback = callback;
if (this._finishedWriting)
callback(this._tempFile);
else if (!this._isWriting && !this._chunks.length)
this._notifyFinished();
},
/**
* @param {*} e
*/
_failedToCreateTempFile: function(e)
{
WebInspector.console.error("Failed to create temp file " + e.code + " : " + e.message);
this._notifyFinished();
},
/**
* @param {!WebInspector.TempFile} tempFile
*/
_didCreateTempFile: function(tempFile)
{
this._tempFile = tempFile;
var callsPendingOpen = this._callsPendingOpen;
this._callsPendingOpen = null;
for (var i = 0; i < callsPendingOpen.length; ++i)
callsPendingOpen[i]();
if (this._chunks.length)
this._writeNextChunk();
},
_writeNextChunk: function()
{
var chunk = this._chunks.shift();
this._isWriting = true;
this._tempFile.write(/** @type {!Array.<string>} */(chunk.strings), this._didWriteChunk.bind(this, chunk.callback));
},
/**
* @param {?function(number)} callback
* @param {number} size
*/
_didWriteChunk: function(callback, size)
{
this._isWriting = false;
if (size === -1) {
this._tempFile = null;
this._notifyFinished();
return;
}
if (callback)
callback(size);
if (this._chunks.length)
this._writeNextChunk();
else if (this._finishCallback)
this._notifyFinished();
},
_notifyFinished: function()
{
this._finishedWriting = true;
if (this._tempFile)
this._tempFile.finishWriting();
var chunks = this._chunks;
this._chunks = [];
for (var i = 0; i < chunks.length; ++i) {
if (chunks[i].callback)
chunks[i].callback(-1);
}
if (this._finishCallback)
this._finishCallback(this._tempFile);
var pendingReads = this._pendingReads;
this._pendingReads = [];
for (var i = 0; i < pendingReads.length; ++i)
pendingReads[i]();
},
/**
* @param {number|undefined} startOffset
* @param {number|undefined} endOffset
* @param {function(string?)} callback
*/
readRange: function(startOffset, endOffset, callback)
{
if (!this._finishedWriting) {
this._pendingReads.push(this.readRange.bind(this, startOffset, endOffset, callback));
return;
}
if (!this._tempFile) {
callback(null);
return;
}
this._tempFile.readRange(startOffset, endOffset, callback);
},
/**
* @param {!WebInspector.OutputStream} outputStream
* @param {!WebInspector.OutputStreamDelegate} delegate
*/
writeToOutputStream: function(outputStream, delegate)
{
if (this._callsPendingOpen) {
this._callsPendingOpen.push(this.writeToOutputStream.bind(this, outputStream, delegate));
return;
}
if (this._tempFile)
this._tempFile.writeToOutputSteam(outputStream, delegate);
},
remove: function()
{
if (this._callsPendingOpen) {
this._callsPendingOpen.push(this.remove.bind(this));
return;
}
if (this._tempFile)
this._tempFile.remove();
}
}
/**
* @param {function(?)} fulfill
* @param {function(*)} reject
*/
WebInspector.TempFile._clearTempStorage = function(fulfill, reject)
{
/**
* @param {!Event} event
*/
function handleError(event)
{
WebInspector.console.error(WebInspector.UIString("Failed to clear temp storage: %s", event.data));
reject(event.data);
}
/**
* @param {!Event} event
*/
function handleMessage(event)
{
if (event.data.type === "tempStorageCleared") {
if (event.data.error)
WebInspector.console.error(event.data.error);
else
fulfill(undefined);
return;
}
reject(event.data);
}
try {
var worker = new WorkerRuntime.Worker("temp_storage_shared_worker", "TempStorageCleaner");
worker.onerror = handleError;
worker.port.onmessage = handleMessage;
worker.port.onerror = handleError;
} catch (e) {
if (e.name === "URLMismatchError")
console.log("Shared worker wasn't started due to url difference. " + e);
else
throw e;
}
}
/**
* @return {!Promise.<undefined>}
*/
WebInspector.TempFile.ensureTempStorageCleared = function()
{
if (!WebInspector.TempFile._storageCleanerPromise)
WebInspector.TempFile._storageCleanerPromise = new Promise(WebInspector.TempFile._clearTempStorage);
return WebInspector.TempFile._storageCleanerPromise;
}