/*
* noVNC: HTML5 VNC client
* Copyright (C) 2011 Joel Martin
* Licensed under LGPL-3 (see LICENSE.txt)
*
* See README.md for usage and integration instructions.
*/
"use strict";
/*jslint bitwise: false, white: false */
/*global window, console, document, navigator, ActiveXObject */
// Globals defined here
var Util = {};
/*
* Make arrays quack
*/
Array.prototype.push8 = function (num) {
this.push(num & 0xFF);
};
Array.prototype.push16 = function (num) {
this.push((num >> 8) & 0xFF,
(num ) & 0xFF );
};
Array.prototype.push32 = function (num) {
this.push((num >> 24) & 0xFF,
(num >> 16) & 0xFF,
(num >> 8) & 0xFF,
(num ) & 0xFF );
};
// IE does not support map (even in IE9)
//This prototype is provided by the Mozilla foundation and
//is distributed under the MIT license.
//http://www.ibiblio.org/pub/Linux/LICENSES/mit.license
if (!Array.prototype.map)
{
Array.prototype.map = function(fun /*, thisp*/)
{
var len = this.length;
if (typeof fun != "function")
throw new TypeError();
var res = new Array(len);
var thisp = arguments[1];
for (var i = 0; i < len; i++)
{
if (i in this)
res[i] = fun.call(thisp, this[i], i, this);
}
return res;
};
}
/*
* ------------------------------------------------------
* Namespaced in Util
* ------------------------------------------------------
*/
/*
* Logging/debug routines
*/
Util._log_level = 'warn';
Util.init_logging = function (level) {
if (typeof level === 'undefined') {
level = Util._log_level;
} else {
Util._log_level = level;
}
if (typeof window.console === "undefined") {
if (typeof window.opera !== "undefined") {
window.console = {
'log' : window.opera.postError,
'warn' : window.opera.postError,
'error': window.opera.postError };
} else {
window.console = {
'log' : function(m) {},
'warn' : function(m) {},
'error': function(m) {}};
}
}
Util.Debug = Util.Info = Util.Warn = Util.Error = function (msg) {};
switch (level) {
case 'debug': Util.Debug = function (msg) { console.log(msg); };
case 'info': Util.Info = function (msg) { console.log(msg); };
case 'warn': Util.Warn = function (msg) { console.warn(msg); };
case 'error': Util.Error = function (msg) { console.error(msg); };
case 'none':
break;
default:
throw("invalid logging type '" + level + "'");
}
};
Util.get_logging = function () {
return Util._log_level;
};
// Initialize logging level
Util.init_logging();
// Set configuration default for Crockford style function namespaces
Util.conf_default = function(cfg, api, defaults, v, mode, type, defval, desc) {
var getter, setter;
// Default getter function
getter = function (idx) {
if ((type in {'arr':1, 'array':1}) &&
(typeof idx !== 'undefined')) {
return cfg[v][idx];
} else {
return cfg[v];
}
};
// Default setter function
setter = function (val, idx) {
if (type in {'boolean':1, 'bool':1}) {
if ((!val) || (val in {'0':1, 'no':1, 'false':1})) {
val = false;
} else {
val = true;
}
} else if (type in {'integer':1, 'int':1}) {
val = parseInt(val, 10);
} else if (type === 'func') {
if (!val) {
val = function () {};
}
}
if (typeof idx !== 'undefined') {
cfg[v][idx] = val;
} else {
cfg[v] = val;
}
};
// Set the description
api[v + '_description'] = desc;
// Set the getter function
if (typeof api['get_' + v] === 'undefined') {
api['get_' + v] = getter;
}
// Set the setter function with extra sanity checks
if (typeof api['set_' + v] === 'undefined') {
api['set_' + v] = function (val, idx) {
if (mode in {'RO':1, 'ro':1}) {
throw(v + " is read-only");
} else if ((mode in {'WO':1, 'wo':1}) &&
(typeof cfg[v] !== 'undefined')) {
throw(v + " can only be set once");
}
setter(val, idx);
};
}
// Set the default value
if (typeof defaults[v] !== 'undefined') {
defval = defaults[v];
} else if ((type in {'arr':1, 'array':1}) &&
(! (defval instanceof Array))) {
defval = [];
}
// Coerce existing setting to the right type
//Util.Debug("v: " + v + ", defval: " + defval + ", defaults[v]: " + defaults[v]);
setter(defval);
};
// Set group of configuration defaults
Util.conf_defaults = function(cfg, api, defaults, arr) {
var i;
for (i = 0; i < arr.length; i++) {
Util.conf_default(cfg, api, defaults, arr[i][0], arr[i][1],
arr[i][2], arr[i][3], arr[i][4]);
}
};
/*
* Cross-browser routines
*/
// Get DOM element position on page
Util.getPosition = function (obj) {
var x = 0, y = 0;
if (obj.offsetParent) {
do {
x += obj.offsetLeft;
y += obj.offsetTop;
obj = obj.offsetParent;
} while (obj);
}
return {'x': x, 'y': y};
};
// Get mouse event position in DOM element
Util.getEventPosition = function (e, obj, scale) {
var evt, docX, docY, pos;
//if (!e) evt = window.event;
evt = (e ? e : window.event);
evt = (evt.changedTouches ? evt.changedTouches[0] : evt.touches ? evt.touches[0] : evt);
if (evt.pageX || evt.pageY) {
docX = evt.pageX;
docY = evt.pageY;
} else if (evt.clientX || evt.clientY) {
docX = evt.clientX + document.body.scrollLeft +
document.documentElement.scrollLeft;
docY = evt.clientY + document.body.scrollTop +
document.documentElement.scrollTop;
}
pos = Util.getPosition(obj);
if (typeof scale === "undefined") {
scale = 1;
}
return {'x': (docX - pos.x) / scale, 'y': (docY - pos.y) / scale};
};
// Event registration. Based on: http://www.scottandrew.com/weblog/articles/cbs-events
Util.addEvent = function (obj, evType, fn){
if (obj.attachEvent){
var r = obj.attachEvent("on"+evType, fn);
return r;
} else if (obj.addEventListener){
obj.addEventListener(evType, fn, false);
return true;
} else {
throw("Handler could not be attached");
}
};
Util.removeEvent = function(obj, evType, fn){
if (obj.detachEvent){
var r = obj.detachEvent("on"+evType, fn);
return r;
} else if (obj.removeEventListener){
obj.removeEventListener(evType, fn, false);
return true;
} else {
throw("Handler could not be removed");
}
};
Util.stopEvent = function(e) {
if (e.stopPropagation) { e.stopPropagation(); }
else { e.cancelBubble = true; }
if (e.preventDefault) { e.preventDefault(); }
else { e.returnValue = false; }
};
// Set browser engine versions. Based on mootools.
Util.Features = {xpath: !!(document.evaluate), air: !!(window.runtime), query: !!(document.querySelector)};
Util.Engine = {
// Version detection break in Opera 11.60 (errors on arguments.callee.caller reference)
//'presto': (function() {
// return (!window.opera) ? false : ((arguments.callee.caller) ? 960 : ((document.getElementsByClassName) ? 950 : 925)); }()),
'presto': (function() { return (!window.opera) ? false : true; }()),
'trident': (function() {
return (!window.ActiveXObject) ? false : ((window.XMLHttpRequest) ? ((document.querySelectorAll) ? 6 : 5) : 4); }()),
'webkit': (function() {
try { return (navigator.taintEnabled) ? false : ((Util.Features.xpath) ? ((Util.Features.query) ? 525 : 420) : 419); } catch (e) { return false; } }()),
//'webkit': (function() {
// return ((typeof navigator.taintEnabled !== "unknown") && navigator.taintEnabled) ? false : ((Util.Features.xpath) ? ((Util.Features.query) ? 525 : 420) : 419); }()),
'gecko': (function() {
return (!document.getBoxObjectFor && window.mozInnerScreenX == null) ? false : ((document.getElementsByClassName) ? 19 : 18); }())
};
if (Util.Engine.webkit) {
// Extract actual webkit version if available
Util.Engine.webkit = (function(v) {
var re = new RegExp('WebKit/([0-9\.]*) ');
v = (navigator.userAgent.match(re) || ['', v])[1];
return parseFloat(v, 10);
})(Util.Engine.webkit);
}
Util.Flash = (function(){
var v, version;
try {
v = navigator.plugins['Shockwave Flash'].description;
} catch(err1) {
try {
v = new ActiveXObject('ShockwaveFlash.ShockwaveFlash').GetVariable('$version');
} catch(err2) {
v = '0 r0';
}
}
version = v.match(/\d+/g);
return {version: parseInt(version[0] || 0 + '.' + version[1], 10) || 0, build: parseInt(version[2], 10) || 0};
}());