META-INF.dirigible.dev-tools.bindings.TempFile.js Maven / Gradle / Ivy
/*
* 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.
*/
import * as Common from '../common/common.js'; // eslint-disable-line no-unused-vars
import * as SDK from '../sdk/sdk.js'; // eslint-disable-line no-unused-vars
import {ChunkedFileReader, ChunkedReader} from './FileUtils.js'; // eslint-disable-line no-unused-vars
export class TempFile {
constructor() {
/** @type {?Blob} */
this._lastBlob = null;
}
/**
* @param {!Array} pieces
*/
write(pieces) {
if (this._lastBlob) {
pieces.unshift(this._lastBlob);
}
this._lastBlob = new Blob(pieces, {type: 'text/plain'});
}
/**
* @return {!Promise}
*/
read() {
return this.readRange();
}
/**
* @return {number}
*/
size() {
return this._lastBlob ? this._lastBlob.size : 0;
}
/**
* @param {number=} startOffset
* @param {number=} endOffset
* @return {!Promise}
*/
async readRange(startOffset, endOffset) {
if (!this._lastBlob) {
Common.Console.Console.instance().error('Attempt to read a temp file that was never written');
return Promise.resolve('');
}
const blob = typeof startOffset === 'number' || typeof endOffset === 'number' ?
this._lastBlob.slice(/** @type {number} */ (startOffset), /** @type {number} */ (endOffset)) :
this._lastBlob;
const reader = new FileReader();
try {
await new Promise((resolve, reject) => {
reader.onloadend = resolve;
reader.onerror = reject;
reader.readAsText(blob);
});
} catch (error) {
Common.Console.Console.instance().error('Failed to read from temp file: ' + error.message);
}
return /** @type {?string} */ (reader.result);
}
/**
* @param {!Common.StringOutputStream.OutputStream} outputStream
* @param {function(!ChunkedReader)=} progress
* @return {!Promise}
*/
copyToOutputStream(outputStream, progress) {
if (!this._lastBlob) {
outputStream.close();
return Promise.resolve(/** @type {?FileError} */ (null));
}
const reader = new ChunkedFileReader(/** @type {!Blob} */ (this._lastBlob), 10 * 1000 * 1000, progress);
return reader.read(outputStream).then(success => success ? null : reader.error());
}
remove() {
this._lastBlob = null;
}
}
/**
* @implements {SDK.TracingModel.BackingStorage}
*/
export class TempFileBackingStorage {
constructor() {
/** @type {?TempFile} */
this._file = null;
/** @type {!Array} */
this._strings;
/** @type {number} */
this._stringsLength;
this.reset();
}
/**
* @override
* @param {string} string
*/
appendString(string) {
this._strings.push(string);
this._stringsLength += string.length;
const flushStringLength = 10 * 1024 * 1024;
if (this._stringsLength > flushStringLength) {
this._flush();
}
}
/**
* @override
* @param {string} string
* @return {function():!Promise}
*/
appendAccessibleString(string) {
this._flush();
const startOffset = this._file.size();
this._strings.push(string);
this._flush();
return this._file.readRange.bind(this._file, startOffset, this._file.size());
}
_flush() {
if (!this._strings.length) {
return;
}
if (!this._file) {
this._file = new TempFile();
}
this._stringsLength = 0;
this._file.write(this._strings.splice(0));
}
/**
* @override
*/
finishWriting() {
this._flush();
}
/**
* @override
*/
reset() {
if (this._file) {
this._file.remove();
}
this._file = null;
/** @type {!Array} */
this._strings = [];
this._stringsLength = 0;
}
/**
* @param {!Common.StringOutputStream.OutputStream} outputStream
* @return {!Promise}
*/
writeToStream(outputStream) {
return this._file ? this._file.copyToOutputStream(outputStream) : Promise.resolve(null);
}
}