DevTools: Split out the "workspace" and "bindings" modules from "sdk"

Source/devtools/front_end/sdk/FileUtils.js

-/*
- * Copyright (C) 2012 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.
- */
-
-/**
- * @interface
- */
-WebInspector.OutputStreamDelegate = function()
-{
-}
-
-WebInspector.OutputStreamDelegate.prototype = {
-    onTransferStarted: function() { },
-
-    onTransferFinished: function() { },
-
-    /**
-     * @param {!WebInspector.ChunkedReader} reader
-     */
-    onChunkTransferred: function(reader) { },
-
-    /**
-     * @param {!WebInspector.ChunkedReader} reader
-     * @param {!Event} event
-     */
-    onError: function(reader, event) { },
-}
-
-/**
- * @interface
- */
-WebInspector.OutputStream = function()
-{
-}
-
-WebInspector.OutputStream.prototype = {
-    /**
-     * @param {string} data
-     * @param {function(!WebInspector.OutputStream)=} callback
-     */
-    write: function(data, callback) { },
-
-    close: function() { }
-}
-
-/**
- * @interface
- */
-WebInspector.ChunkedReader = function()
-{
-}
-
-WebInspector.ChunkedReader.prototype = {
-    /**
-     * @return {number}
-     */
-    fileSize: function() { },
-
-    /**
-     * @return {number}
-     */
-    loadedSize: function() { },
-
-    /**
-     * @return {string}
-     */
-    fileName: function() { },
-
-    cancel: function() { }
-}
-
-/**
- * @constructor
- * @implements {WebInspector.ChunkedReader}
- * @param {!File} file
- * @param {number} chunkSize
- * @param {!WebInspector.OutputStreamDelegate} delegate
- */
-WebInspector.ChunkedFileReader = function(file, chunkSize, delegate)
-{
-    this._file = file;
-    this._fileSize = file.size;
-    this._loadedSize = 0;
-    this._chunkSize = chunkSize;
-    this._delegate = delegate;
-    this._isCanceled = false;
-}
-
-WebInspector.ChunkedFileReader.prototype = {
-    /**
-     * @param {!WebInspector.OutputStream} output
-     */
-    start: function(output)
-    {
-        this._output = output;
-
-        this._reader = new FileReader();
-        this._reader.onload = this._onChunkLoaded.bind(this);
-        this._reader.onerror = this._delegate.onError.bind(this._delegate, this);
-        this._delegate.onTransferStarted();
-        this._loadChunk();
-    },
-
-    cancel: function()
-    {
-        this._isCanceled = true;
-    },
-
-    /**
-     * @return {number}
-     */
-    loadedSize: function()
-    {
-        return this._loadedSize;
-    },
-
-    /**
-     * @return {number}
-     */
-    fileSize: function()
-    {
-        return this._fileSize;
-    },
-
-    /**
-     * @return {string}
-     */
-    fileName: function()
-    {
-        return this._file.name;
-    },
-
-    /**
-     * @param {!Event} event
-     */
-    _onChunkLoaded: function(event)
-    {
-        if (this._isCanceled)
-            return;
-
-        if (event.target.readyState !== FileReader.DONE)
-            return;
-
-        var data = event.target.result;
-        this._loadedSize += data.length;
-
-        this._output.write(data);
-        if (this._isCanceled)
-            return;
-        this._delegate.onChunkTransferred(this);
-
-        if (this._loadedSize === this._fileSize) {
-            this._file = null;
-            this._reader = null;
-            this._output.close();
-            this._delegate.onTransferFinished();
-            return;
-        }
-
-        this._loadChunk();
-    },
-
-    _loadChunk: function()
-    {
-        var chunkStart = this._loadedSize;
-        var chunkEnd = Math.min(this._fileSize, chunkStart + this._chunkSize)
-        var nextPart = this._file.slice(chunkStart, chunkEnd);
-        this._reader.readAsText(nextPart);
-    }
-}
-
-/**
- * @param {function(!File)} callback
- * @return {!Node}
- */
-WebInspector.createFileSelectorElement = function(callback) {
-    var fileSelectorElement = document.createElement("input");
-    fileSelectorElement.type = "file";
-    fileSelectorElement.style.display = "none";
-    fileSelectorElement.setAttribute("tabindex", -1);
-    fileSelectorElement.onchange = onChange;
-    function onChange(event)
-    {
-        callback(fileSelectorElement.files[0]);
-    };
-    return fileSelectorElement;
-}
-
-/**
- * @constructor
- * @implements {WebInspector.OutputStream}
- */
-WebInspector.FileOutputStream = function()
-{
-}
-
-WebInspector.FileOutputStream.prototype = {
-    /**
-     * @param {string} fileName
-     * @param {function(boolean)} callback
-     */
-    open: function(fileName, callback)
-    {
-        this._closed = false;
-        this._writeCallbacks = [];
-        this._fileName = fileName;
-
-        /**
-         * @param {boolean} accepted
-         * @this {WebInspector.FileOutputStream}
-         */
-        function callbackWrapper(accepted)
-        {
-            if (accepted)
-                WebInspector.fileManager.addEventListener(WebInspector.FileManager.EventTypes.AppendedToURL, this._onAppendDone, this);
-            callback(accepted);
-        }
-        WebInspector.fileManager.save(this._fileName, "", true, callbackWrapper.bind(this));
-    },
-
-    /**
-     * @param {string} data
-     * @param {function(!WebInspector.OutputStream)=} callback
-     */
-    write: function(data, callback)
-    {
-        this._writeCallbacks.push(callback);
-        WebInspector.fileManager.append(this._fileName, data);
-    },
-
-    close: function()
-    {
-        this._closed = true;
-        if (this._writeCallbacks.length)
-            return;
-        WebInspector.fileManager.removeEventListener(WebInspector.FileManager.EventTypes.AppendedToURL, this._onAppendDone, this);
-        WebInspector.fileManager.close(this._fileName);
-    },
-
-    /**
-     * @param {!WebInspector.Event} event
-     */
-    _onAppendDone: function(event)
-    {
-        if (event.data !== this._fileName)
-            return;
-        var callback = this._writeCallbacks.shift();
-        if (callback)
-            callback(this);
-        if (!this._writeCallbacks.length) {
-            if (this._closed) {
-                WebInspector.fileManager.removeEventListener(WebInspector.FileManager.EventTypes.AppendedToURL, this._onAppendDone, this);
-                WebInspector.fileManager.close(this._fileName);
-            }
-        }
-    }
-}