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// 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;
/**
* @see http://www.w3.org/TR/FileAPI/#dfn-slice
* @param {number} start The start byte offset.
* @param {number} length The number of bytes to slice.
* @param {string=} opt_contentType The type of the resulting Blob.
* @return {!goog.testing.fs.Blob} The result of the slice operation.
*/
goog.testing.fs.Blob.prototype.slice = function(
start, length, opt_contentType) {
start = Math.max(0, start);
return new goog.testing.fs.Blob(
this.data_.substring(start, start + Math.max(length, 0)),
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;
};
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