1 /*
  2  * Copyright (C) 2013 Glyptodon LLC
  3  *
  4  * Permission is hereby granted, free of charge, to any person obtaining a copy
  5  * of this software and associated documentation files (the "Software"), to deal
  6  * in the Software without restriction, including without limitation the rights
  7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  8  * copies of the Software, and to permit persons to whom the Software is
  9  * furnished to do so, subject to the following conditions:
 10  *
 11  * The above copyright notice and this permission notice shall be included in
 12  * all copies or substantial portions of the Software.
 13  *
 14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 19  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 20  * THE SOFTWARE.
 21  */
 22 
 23 var Guacamole = Guacamole || {};
 24 
 25 /**
 26  * A reader which automatically handles the given input stream, returning
 27  * strictly received packets as array buffers. Note that this object will
 28  * overwrite any installed event handlers on the given Guacamole.InputStream.
 29  * 
 30  * @constructor
 31  * @param {Guacamole.InputStream} stream The stream that data will be read
 32  *                                       from.
 33  */
 34 Guacamole.ArrayBufferReader = function(stream) {
 35 
 36     /**
 37      * Reference to this Guacamole.InputStream.
 38      * @private
 39      */
 40     var guac_reader = this;
 41 
 42     // Receive blobs as array buffers
 43     stream.onblob = function(data) {
 44 
 45         // Convert to ArrayBuffer
 46         var binary = window.atob(data);
 47         var arrayBuffer = new ArrayBuffer(binary.length);
 48         var bufferView = new Uint8Array(arrayBuffer);
 49 
 50         for (var i=0; i<binary.length; i++)
 51             bufferView[i] = binary.charCodeAt(i);
 52 
 53         // Call handler, if present
 54         if (guac_reader.ondata)
 55             guac_reader.ondata(arrayBuffer);
 56 
 57     };
 58 
 59     // Simply call onend when end received
 60     stream.onend = function() {
 61         if (guac_reader.onend)
 62             guac_reader.onend();
 63     };
 64 
 65     /**
 66      * Fired once for every blob of data received.
 67      * 
 68      * @event
 69      * @param {ArrayBuffer} buffer The data packet received.
 70      */
 71     this.ondata = null;
 72 
 73     /**
 74      * Fired once this stream is finished and no further data will be written.
 75      * @event
 76      */
 77     this.onend = null;
 78 
 79 };