| // 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; |
| }; |