// Copyright 2011 The Closure Library Authors. All Rights Reserved. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS-IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. /** * @fileoverview Mock blob object. * */ goog.provide('goog.testing.fs.Blob'); goog.require('goog.crypt.base64'); /** * A mock Blob object. The data is stored as a string. * * @param {string=} opt_data The string data encapsulated by the blob. * @param {string=} opt_type The mime type of the blob. * @constructor */ goog.testing.fs.Blob = function(opt_data, opt_type) { /** * @see http://www.w3.org/TR/FileAPI/#dfn-type * @type {string} */ this.type = opt_type || ''; this.setDataInternal(opt_data || ''); }; /** * The string data encapsulated by the blob. * @type {string} * @private */ goog.testing.fs.Blob.prototype.data_; /** * @see http://www.w3.org/TR/FileAPI/#dfn-size * @type {number} */ goog.testing.fs.Blob.prototype.size; /** * Creates a blob with bytes of a blob ranging from the optional start * parameter up to but not including the optional end parameter, and with a type * attribute that is the value of the optional contentType parameter. * @see http://www.w3.org/TR/FileAPI/#dfn-slice * @param {number=} opt_start The start byte offset. * @param {number=} opt_end The end point of a slice. * @param {string=} opt_contentType The type of the resulting Blob. * @return {!goog.testing.fs.Blob} The result blob of the slice operation. */ goog.testing.fs.Blob.prototype.slice = function( opt_start, opt_end, opt_contentType) { var relativeStart; if (goog.isNumber(opt_start)) { relativeStart = (opt_start < 0) ? Math.max(this.data_.length + opt_start, 0) : Math.min(opt_start, this.data_.length); } else { relativeStart = 0; } var relativeEnd; if (goog.isNumber(opt_end)) { relativeEnd = (opt_end < 0) ? Math.max(this.data_.length + opt_end, 0) : Math.min(opt_end, this.data_.length); } else { relativeEnd = this.data_.length; } var span = Math.max(relativeEnd - relativeStart, 0); return new goog.testing.fs.Blob( this.data_.substr(relativeStart, span), opt_contentType); }; /** * @return {string} The string data encapsulated by the blob. * @override */ goog.testing.fs.Blob.prototype.toString = function() { return this.data_; }; /** * @return {!ArrayBuffer} The string data encapsulated by the blob as an * ArrayBuffer. */ goog.testing.fs.Blob.prototype.toArrayBuffer = function() { var buf = new ArrayBuffer(this.data_.length * 2); var arr = new Uint16Array(buf); for (var i = 0; i < this.data_.length; i++) { arr[i] = this.data_.charCodeAt(i); } return buf; }; /** * @return {string} The string data encapsulated by the blob as a data: URI. */ goog.testing.fs.Blob.prototype.toDataUrl = function() { return 'data:' + this.type + ';base64,' + goog.crypt.base64.encodeString(this.data_); }; /** * Sets the internal contents of the blob. This should only be called by other * functions inside the {@code goog.testing.fs} namespace. * * @param {string} data The data for this Blob. */ goog.testing.fs.Blob.prototype.setDataInternal = function(data) { this.data_ = data; this.size = data.length; };