/*
* Copyright (C) 2013 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
var Guacamole = Guacamole || {};
/**
* A writer which automatically writes to the given output stream with arbitrary
* binary data, supplied as ArrayBuffers.
*
* @constructor
* @param {Guacamole.OutputStream} stream The stream that data will be written
* to.
*/
Guacamole.ArrayBufferWriter = function(stream) {
/**
* Reference to this Guacamole.StringWriter.
* @private
*/
var guac_writer = this;
// Simply call onack for acknowledgements
stream.onack = function(status) {
if (guac_writer.onack)
guac_writer.onack(status);
};
/**
* Encodes the given data as base64, sending it as a blob. The data must
* be small enough to fit into a single blob instruction.
*
* @private
* @param {Uint8Array} bytes The data to send.
*/
function __send_blob(bytes) {
var binary = "";
// Produce binary string from bytes in buffer
for (var i=0; i<bytes.byteLength; i++)
binary += String.fromCharCode(bytes[i]);
// Send as base64
stream.sendBlob(window.btoa(binary));
}
/**
* Sends the given data.
*
* @param {ArrayBuffer|TypedArray} data The data to send.
*/
this.sendData = function(data) {
var bytes = new Uint8Array(data);
// If small enough to fit into single instruction, send as-is
if (bytes.length <= 8064)
__send_blob(bytes);
// Otherwise, send as multiple instructions
else {
for (var offset=0; offset<bytes.length; offset += 8064)
__send_blob(bytes.subarray(offset, offset + 8094));
}
};
/**
* Signals that no further text will be sent, effectively closing the
* stream.
*/
this.sendEnd = function() {
stream.sendEnd();
};
/**
* Fired for received data, if acknowledged by the server.
* @event
* @param {Guacamole.Status} status The status of the operation.
*/
this.onack = null;
};