add comment abou the origin of the code

[novnc-pve.git] / pveui.js

/*
 * noVNC: HTML5 VNC client
 * Copyright (C) 2012 Joel Martin
 * Copyright (C) 2013 Samuel Mannehed for Cendio AB
 * Licensed under MPL 2.0 (see LICENSE.txt)
 *
 * This is a modified version of the original 'ui.js' file, used
 * for the proxmox console.
 */

"use strict";
/*jslint white: false, browser: true */
/*global window, $D, Util, WebUtil, RFB, Display */

// Load supporting scripts
window.onscriptsload = function () { UI.load(); };
window.onload = function () { UI.keyboardinputReset(); };
Util.load_scripts(["webutil.js", "base64.js", "websock.js", "des.js",
                   "keysymdef.js", "keyboard.js", "input.js", "display.js",
                   "jsunzip.js", "rfb.js", "keysym.js"]);

var UI = {

rfb_state : 'loaded',
pveCommandsOpen: false,
settingsOpen : false,
connSettingsOpen : false,
popupStatusOpen : false,
clipboardOpen: false,
sendKeysVisible: false,
keyboardVisible: false,
hideKeyboardTimeout: null,
lastKeyboardinput: null,
defaultKeyboardinputLen: 100,
extraKeysVisible: false,
ctrlOn: false,
altOn: false,
isTouchDevice: false,

consoletype: undefined,
vmid: undefined,
vmname: undefined,
nodename: undefined,

// Setup rfb object, load settings from browser storage, then call
// UI.init to setup the UI/menus
load: function (callback) {
    WebUtil.initSettings(UI.pve_start, callback);
},

// Proxmox VE related code

urlEncode: function(object) {
    var i,value, params = [];

    for (i in object) {
        if (object.hasOwnProperty(i)) {
            value = object[i];
	    if (value === undefined) value = '';
            params.push(encodeURIComponent(i) + '=' + encodeURIComponent(String(value)));
        }
    }

    return params.join('&');
},

API2Request: function(reqOpts) {

    reqOpts.method = reqOpts.method || 'GET';

    var xhr = new XMLHttpRequest();

    xhr.onload = function() {
	var scope = reqOpts.scope || this;
	var result;
	var errmsg;

	if (xhr.readyState === 4) {
	    var ctype = xhr.getResponseHeader('Content-Type');
	    if (xhr.status === 200) {
		if (ctype.match(/application\/json;/)) {
		    result = JSON.parse(xhr.responseText);
		} else {
		    errmsg = 'got unexpected content type ' + ctype;
		}
	    } else {
		errmsg = 'Error ' + xhr.status + ': ' + xhr.statusText;
	    }
	} else {
	    errmsg = 'Connection error - server offline?';
	}

	if (errmsg !== undefined) {
	    if (reqOpts.failure) {
		reqOpts.failure.call(scope, errmsg);
	    }
	} else {
	    if (reqOpts.success) {
		reqOpts.success.call(scope, result);
	    }
	}
	if (reqOpts.callback) {
	    reqOpts.callback.call(scope, errmsg === undefined);
	}
    }

    var data = UI.urlEncode(reqOpts.params || {});

    if (reqOpts.method === 'GET') {
	xhr.open(reqOpts.method, "/api2/json" + reqOpts.url + '?' + data);
    } else {
	xhr.open(reqOpts.method, "/api2/json" + reqOpts.url);
    }
    xhr.setRequestHeader('Cache-Control', 'no-cache');
    if (reqOpts.method === 'POST' || reqOpts.method === 'PUT') {
	xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	xhr.setRequestHeader('CSRFPreventionToken', PVE.CSRFPreventionToken);
	xhr.send(data);
    } else if (reqOpts.method === 'GET') {
	xhr.send();
    } else {
	throw "unknown method";
    }


},

// show msg for 5 seconds
pve_show_msg: function(klass, msg, permanant) {
    var oldklass = $D('noVNC-control-bar').getAttribute("class");
    $D('noVNC-control-bar').setAttribute("class", klass);
    var oldmsg = $D('noVNC_status').innerHTML;
    $D('noVNC_status').innerHTML = msg;
    if (typeof permanent !== 'undefined' && permanent) return;

    setTimeout(function() {
	var curmsg = $D('noVNC_status').innerHTML;
  	if (curmsg === msg) {
	    $D('noVNC_status').innerHTML = oldmsg;
	}
	var curklass = $D('noVNC-control-bar').getAttribute("class");
  	if (curklass === klass) {
	    $D('noVNC-control-bar').setAttribute("class", oldklass);
	}
    }, 5000);
},

pve_vm_command: function(cmd, params, reload) {
    var baseUrl;

    if (UI.consoletype === 'kvm') {
	baseUrl = '/nodes/' + UI.nodename + '/qemu/' + UI.vmid;
    } else if (UI.consoletype === 'openvz') {
	baseUrl = '/nodes/' + UI.nodename + '/openvz/' + UI.vmid;
    } else {
	throw "unknown VM type";
    }

    UI.API2Request({
	params: params,
	url: baseUrl + "/status/" + cmd,
	method: 'POST',
	failure: function(msg) {
            UI.pve_show_msg('noVNC_status_warn', msg);
	},
	success: function() {
            UI.pve_show_msg('noVNC_status_normall', "VM command '" + cmd +"' successful");
	    if (reload) {
		setTimeout(function() {
		    UI.pveReload();
		}, 1000);
	    };
	}
    });
},

pveCmdStart: function() {
    if (UI.pveCommandsOpen === true) {
	UI.togglePVECommandPanel();
    }
    UI.pve_vm_command('start', {}, true);
},

pveCmdShutdown: function() {
    if (UI.pveCommandsOpen === true) {
	UI.togglePVECommandPanel();
    }
    var msg = gettext("Do you really want to shutdown VM {0}?");
    msg = msg.replace(/\{0\}/, UI.vmid);

    if (confirm(msg) === true) { 
	UI.pve_vm_command('shutdown');
    }
},

pveCmdStop: function() {
    if (UI.pveCommandsOpen === true) {
	UI.togglePVECommandPanel();
    }

    var msg = gettext("Do you really want to stop VM {0}?");
    msg = msg.replace(/\{0\}/, UI.vmid);

    if (confirm(msg) === true) { 
	UI.pve_vm_command('stop');
    }
},

pveCmdReset: function() {
    if (UI.pveCommandsOpen === true) {
	UI.togglePVECommandPanel();
    }
    var msg = gettext("Do you really want to reset VM {0}?");
    msg = msg.replace(/\{0\}/, UI.vmid);

    if (confirm(msg) === true) { 
	UI.pve_vm_command('reset');
    }
},

pveCmdSuspend: function() {
    if (UI.pveCommandsOpen === true) {
	UI.togglePVECommandPanel();
    }
    var msg = gettext("Do you really want to suspend VM {0}?");
    msg = msg.replace(/\{0\}/, UI.vmid);

    if (confirm(msg) === true) { 
	UI.pve_vm_command('suspend');
    }
},

pveCmdResume: function() {
    if (UI.pveCommandsOpen === true) {
	UI.togglePVECommandPanel();
    }
    UI.pve_vm_command('resume');
},

pveCmdReload: function() {
    if (UI.pveCommandsOpen === true) {
	UI.togglePVECommandPanel();
    }
    UI.pveReload();
},

pveReload: function() {
    location.reload();
},

pve_send_key: function(keyname) {
    var baseUrl;

    if (UI.consoletype === 'kvm') {
	baseUrl = '/nodes/' + UI.nodename + '/qemu/' + UI.vmid;
    } else {
	throw "send key not implemented";
    }

    UI.API2Request({
	params: { key: keyname },
	url: baseUrl + '/sendkey',
	method: 'PUT',
	failure: function(msg) {
            UI.pve_show_msg('noVNC_status_warn', msg);
	}
    });
},
 
pve_start: function(callback) {
    UI.consoletype = WebUtil.getQueryVar('console');
    UI.vmid = WebUtil.getQueryVar('vmid');
    UI.vmname = WebUtil.getQueryVar('vmname');
    UI.nodename = WebUtil.getQueryVar('node');
    
    var url;
    var wsurl;
    var params = { websocket: 1 };
    var btn;
    
    // add pve command buttons
    var cmdpanel = $D('noVNC_pve_command_menu');
    var buttonlist = [
	{
	    text: gettext('Start'), 
	    handler: UI.pveCmdStart,
	    enable: { kvm: 1, openvz: 1 }
	},
	{
	    text: gettext('Shutdown'), 
	    handler: UI.pveCmdShutdown,
	    enable: { kvm: 1, openvz: 1 }
	},
	{
	    text: gettext('Stop'),
	    handler: UI.pveCmdStop,
	    enable: { kvm: 1, openvz: 1 }
	},
	{
	    text: gettext('Reset'),
	    handler: UI.pveCmdReset,
	    enable: { kvm: 1 }
	},
	{
	    text: gettext('Suspend'),
	    handler: UI.pveCmdSuspend,
	    enable: { kvm: 1 }
	},
	{
	    text: gettext('Resume'),
	    handler: UI.pveCmdResume,
	    enable: { kvm: 1 }
	},
	{
	    text: gettext('Reload'),
	    handler: UI.pveCmdReload,
	    enable: { any: 1 }
	}
    ];
    buttonlist.forEach(function(btn) {
	if (btn.enable.any || btn.enable[UI.consoletype]) {
	    var el = document.createElement('input');
	    el.setAttribute('type', 'button');
	    el.setAttribute('value', btn.text);
	    el.onclick = btn.handler;
 	    el.style.display = "block";
	    el.style.width = "100%";
	    el.style.minWidth = "150px";
	    cmdpanel.appendChild(el);
	    console.log("ADD: " + btn.text);
	}
    });

    // add sendKeys buttons
    var skpanel = $D('noVNC_send_keys_panel');

    buttonlist = [
	{
	    text: 'Tab', handler: function() {
		UI.pve_send_key('tab');
	    }
	},
	{
	    text: 'Ctrl-Alt-Delete', handler: function() {
		UI.pve_send_key('ctrl-alt-delete');
	    }
	},
	{
	    text: 'Ctrl-Alt-Backspace', handler: function() {
		UI.pve_send_key('ctrl-alt-backspace');  
	    }
	},
	{
	    text: 'Ctrl-Alt-F1', handler: function() {
		UI.pve_send_key('ctrl-alt-f1');
	    }
	},
	{
	    text: 'Ctrl-Alt-F2', handler: function() {
		UI.pve_send_key('ctrl-alt-f2');
	    }
	},
	{
	    text: 'Ctrl-Alt-F3', handler: function() {
		UI.pve_send_key('ctrl-alt-f3');
	    }
	},
	{
	    text: 'Ctrl-Alt-F4', handler: function() {
		UI.pve_send_key('ctrl-alt-f4');
	    }
	},
	{
	    text: 'Ctrl-Alt-F5', handler: function() {
		UI.pve_send_key('ctrl-alt-f5');
	    }
	},
	{
	    text: 'Ctrl-Alt-F6', handler: function() {
		UI.pve_send_key('ctrl-alt-f6');
	    }
	},
	{
	    text: 'Ctrl-Alt-F7', handler: function() {
		UI.pve_send_key('ctrl-alt-f7');
	    }
	},
	{
	    text: 'Ctrl-Alt-F8', handler: function() {
		UI.pve_send_key('ctrl-alt-f8');
	    }
	},
	{
	    text: 'Ctrl-Alt-F9', handler: function() {
		UI.pve_send_key('ctrl-alt-f9');
	    }
	},
	{
	    text: 'Ctrl-Alt-F10', handler: function() {
		UI.pve_send_key('ctrl-alt-f10');
	    }
	},
	{
	    text: 'Ctrl-Alt-F11', handler: function() {
		UI.pve_send_key('ctrl-alt-f11');
	    }
	},
	{
	    text: 'Ctrl-Alt-F12', handler: function() {
		UI.pve_send_key('ctrl-alt-f12');
	    }
	}
    ];

    buttonlist.forEach(function(btn) {
	var el = document.createElement('input');
	el.setAttribute('type', 'button');
	el.setAttribute('value', btn.text);
	el.onclick = function(handler) {
	    return function() {
		if (UI.sendKeysVisible === true) {
		    UI.togglePVESendKeysPanel();
		}

		handler.call(this);
	    };
	}(btn.handler);
 	el.style.display = "block";
	el.style.width = "100%";
	el.style.minWidth = "150px";
	skpanel.appendChild(el);
    });

    var title;

    if (UI.consoletype === 'kvm') {
	var baseUrl = '/nodes/' + UI.nodename + '/qemu/' + UI.vmid;
	url =  baseUrl + '/vncproxy';
	wsurl = baseUrl + '/vncwebsocket';
	title = "VM " + UI.vmid;
	if (UI.vmname) {
	    title += " ('" + UI.vmname + "')";
	}
    } else if (UI.consoletype === 'openvz') {
	var baseUrl = '/nodes/' + UI.nodename + '/openvz/' + UI.vmid;
	url =  baseUrl + '/vncproxy';
	wsurl = baseUrl + '/vncwebsocket';
	title = "CT " + UI.vmid;
	if (UI.vmname) {
	    title += " ('" + UI.vmname + "')";
	}
    } else if (UI.consoletype === 'shell') {
	var baseUrl = '/nodes/' + UI.nodename;
	url =  baseUrl + '/vncshell';
	wsurl = baseUrl + '/vncwebsocket';
	title = "node '" + UI.nodename + "'";
    } else if (UI.consoletype === 'upgrade') {
	var baseUrl = '/nodes/' + UI.nodename;
	url =  baseUrl + '/vncshell';
	wsurl = baseUrl + '/vncwebsocket';
	params.upgrade = 1;
	title = gettext('System upgrade on node {0}');
	title = title.replace(/\{0\}/, UI.nodename);
    } else {
	throw "implement me";
    }

    document.title = title;

    var start_vnc_viewer = function(param) {
	var wsparams = UI.urlEncode({
	    port: param.port,
	    vncticket: param.ticket
	});

	UI.updateSetting('host', window.location.hostname);
	UI.updateSetting('port', window.location.port);
	UI.updateSetting('password', param.ticket);
	UI.updateSetting('encrypt', true);
	UI.updateSetting('true_color', true);
	UI.updateSetting('cursor', !UI.isTouchDevice);
	UI.updateSetting('shared', true);
	UI.updateSetting('view_only', false);

	UI.updateSetting('path', 'api2/json' + wsurl + "?" + wsparams);

	UI.start(callback);
    };

    UI.API2Request({
	url: url,
	method: 'POST',
	params: params,
	success: function(result) {
	    start_vnc_viewer(result.data);
	},
	failure: function(msg) {
            UI.pve_show_msg('noVNC_status_error', msg, 1);
	}
    });
},

lastFBWidth: undefined,
lastFBHeight: undefined,
sizeUpdateTimer: undefined,

updateFBSize: function(rfb, width, height) {
    try {
	// Note1: CSS Canvas size is wrong by a few pixels in Chrome
	// Note2: window size must be even number for firefox
	UI.lastFBWidth = Math.floor((width + 1)/2)*2;;
	UI.lastFBHeight = Math.floor((height + 6)/2)*2;

	if (UI.sizeUpdateTimer !== undefined) {
	    clearInterval(UI.sizeUpdateTimer);
	}
	if (UI.getSetting('clip')) return;

	var update_size = function() {
	    var oh;
	    var ow;

	    if (window.innerHeight) {
		oh = window.innerHeight;
		ow = window.innerWidth;
	    } else if (document.documentElement && 
		       document.documentElement.clientHeight) {
		oh = document.documentElement.clientHeight;
		ow = document.documentElement.clientWidth;
	    } else if (document.body) {
		oh = document.body.clientHeight;
		ow = document.body.clientWidth;
	    }  else {
		throw "can't get window size";
	    }
	
	    // see base.css/noVNC_screen_pad
	    var toolbar_height = 36;

	    var offsetw = UI.lastFBWidth - ow;
	    var offseth = UI.lastFBHeight + toolbar_height - oh;
	    if (offsetw !== 0 || offseth !== 0) {
		//console.log("try resize by " + offsetw + " " + offseth);
		window.resizeBy(offsetw, offseth);
	    }
	};

	update_size();
	UI.sizeUpdateTimer = setInterval(update_size, 1000);

    } catch(e) {
	console.log(e);
    }
},

// Open/close PVE commandand menu
togglePVECommandPanel: function() {
    // Close the description panel
    $D('noVNC_description').style.display = "none";
    if (UI.sendKeysVisible === true) {
	UI.togglePVESendKeysPanel();
    }
    // Close clipboard panel if open
    if (UI.clipboardOpen === true) {
        UI.toggleClipboardPanel();
    }
    // Close connection settings if open
    if (UI.connSettingsOpen === true) {
        UI.toggleConnectPanel();
    }
    // Close popup status panel if open
    if (UI.popupStatusOpen === true) {
        UI.togglePopupStatusPanel();
    }
    // Close XVP panel if open
    if (UI.xvpOpen === true) {
        UI.toggleXvpPanel();
    }
    if (UI.pveCommandsOpen) {
	$D('noVNC_pve_commands').style.display = "none";
	$D('pveCommandsButton').className = "noVNC_status_button";
	UI.pveCommandsOpen = false;
    } else {
	$D('noVNC_pve_commands').style.display = "block";
	$D('pveCommandsButton').className = "noVNC_status_button_selected";
	UI.pveCommandsOpen = true;
    }
},

// Open/close PVE SendKeys menu
togglePVESendKeysPanel: function() {
    // Close the description panel
    $D('noVNC_description').style.display = "none";
    if (UI.pveCommandsOpen === true) {
	UI.togglePVECommandPanel();
    }
    // Close clipboard panel if open
    if (UI.clipboardOpen === true) {
        UI.toggleClipboardPanel();
    }
    // Close connection settings if open
    if (UI.connSettingsOpen === true) {
        UI.toggleConnectPanel();
    }
    // Close popup status panel if open
    if (UI.popupStatusOpen === true) {
        UI.togglePopupStatusPanel();
    }
    // Close XVP panel if open
    if (UI.xvpOpen === true) {
        UI.toggleXvpPanel();
    }
    if (UI.sendKeysVisible) {
	$D('noVNC_send_keys').style.display = "none";
	$D('showSendKeysButton').className = "noVNC_status_button";
        UI.sendKeysVisible = false;
    } else {
	$D('noVNC_send_keys').style.display = "block";
	$D('showSendKeysButton').className = "noVNC_status_button_selected";
        UI.sendKeysVisible = true;
    }
},

// Render default UI and initialize settings menu
start: function(callback) {
    var html = '', i, sheet, sheets, llevels, port, autoconnect;

    UI.isTouchDevice = 'ontouchstart' in document.documentElement;

    // Stylesheet selection dropdown
    sheet = WebUtil.selectStylesheet();
    sheets = WebUtil.getStylesheets();
    for (i = 0; i < sheets.length; i += 1) {
        //UI.addOption($D('noVNC_stylesheet'),sheets[i].title, sheets[i].title);
    }

    // Logging selection dropdown
    llevels = ['error', 'warn', 'info', 'debug'];
    for (i = 0; i < llevels.length; i += 1) {
        //UI.addOption($D('noVNC_logging'),llevels[i], llevels[i]);
    }

    // Settings with immediate effects
    UI.initSetting('logging', 'warn');
    WebUtil.init_logging(UI.getSetting('logging'));

    UI.initSetting('stylesheet', 'default');
    WebUtil.selectStylesheet(null);
    // call twice to get around webkit bug
    WebUtil.selectStylesheet(UI.getSetting('stylesheet'));

    UI.initSetting('repeaterID', '');

    UI.rfb = RFB({'target': $D('noVNC_canvas'),
                  'onUpdateState': UI.updateState,
                  'onXvpInit': UI.updateXvpVisualState,
                  'onClipboard': UI.clipReceive,
                  //'onDesktopName': UI.updateDocumentTitle,
		  'onFBResize': UI.updateFBSize});

    autoconnect = true;
    if (autoconnect === 'true' || autoconnect == '1') {
        autoconnect = true;
        UI.connect();
    } else {
        autoconnect = false;
    }

    UI.updateVisualState();

    // Unfocus clipboard when over the VNC area
    //$D('VNC_screen').onmousemove = function () {
    //         var keyboard = UI.rfb.get_keyboard();
    //        if ((! keyboard) || (! keyboard.get_focused())) {
    //            $D('VNC_clipboard_text').blur();
    //         }
    //    };

    // Show mouse selector buttons on touch screen devices
    if (UI.isTouchDevice) {
        // Show mobile buttons
        $D('noVNC_mobile_buttons').style.display = "inline";
	$D('showSendKeysButton').style.display = "none";
        UI.setMouseButton();
        // Remove the address bar
        setTimeout(function() { window.scrollTo(0, 1); }, 100);
        UI.forceSetting('clip', true);
        $D('noVNC_clip').disabled = true;
    } else {
	$D('showSendKeysButton').style.display = (UI.consoletype === 'kvm') ? "inline" : "none";
        UI.initSetting('clip', false);
    }

    //iOS Safari does not support CSS position:fixed.
    //This detects iOS devices and enables javascript workaround.
    if ((navigator.userAgent.match(/iPhone/i)) ||
        (navigator.userAgent.match(/iPod/i)) ||
        (navigator.userAgent.match(/iPad/i))) {
        //UI.setOnscroll();
        //UI.setResize();
    }
    UI.setBarPosition();

    $D('noVNC_host').focus();

    UI.setViewClip();
    Util.addEvent(window, 'resize', UI.setViewClip);

    Util.addEvent(window, 'beforeunload', function () {
        if (UI.rfb_state === 'normal') {
            return "You are currently connected.";
        }
    } );

    // Show description by default when hosted at for kanaka.github.com
    if (location.host === "kanaka.github.io") {
        // Open the description dialog
        $D('noVNC_description').style.display = "block";
    } else {
        // Show the connect panel on first load unless autoconnecting
        if (autoconnect === UI.connSettingsOpen) {
            UI.toggleConnectPanel();
        }
    }

    // Add mouse event click/focus/blur event handlers to the UI
    UI.addMouseHandlers();

    if (typeof callback === "function") {
        callback(UI.rfb);
    }
},

addMouseHandlers: function() {
    // Setup interface handlers that can't be inline
    $D("noVNC_view_drag_button").onclick = UI.setViewDrag;
    $D("noVNC_mouse_button0").onclick = function () { UI.setMouseButton(1); };
    $D("noVNC_mouse_button1").onclick = function () { UI.setMouseButton(2); };
    $D("noVNC_mouse_button2").onclick = function () { UI.setMouseButton(4); };
    $D("noVNC_mouse_button4").onclick = function () { UI.setMouseButton(0); };
    $D("showKeyboard").onclick = UI.showKeyboard;

    $D("keyboardinput").oninput = UI.keyInput;
    $D("keyboardinput").onblur = UI.keyInputBlur;

    $D("showExtraKeysButton").onclick = UI.showExtraKeys;
    $D("toggleCtrlButton").onclick = UI.toggleCtrl;
    $D("toggleAltButton").onclick = UI.toggleAlt;
    $D("sendTabButton").onclick = UI.sendTab;
    $D("sendEscButton").onclick = UI.sendEsc;

    $D("showSendKeysButton").onclick = UI.togglePVESendKeysPanel;

    $D("sendCtrlAltDelButton").onclick = UI.sendCtrlAltDel;
    //$D("xvpShutdownButton").onclick = UI.xvpShutdown;
    //$D("xvpRebootButton").onclick = UI.xvpReboot;
    //$D("xvpResetButton").onclick = UI.xvpReset;
    // disable popup, because it does not provide more info?
    //$D("noVNC_status").onclick = UI.togglePopupStatusPanel;
    $D("noVNC_popup_status_panel").onclick = UI.togglePopupStatusPanel;
    //$D("xvpButton").onclick = UI.toggleXvpPanel;
    $D("clipboardButton").onclick = UI.toggleClipboardPanel;
    //$D("settingsButton").onclick = UI.toggleSettingsPanel;
    $D("pveCommandsButton").onclick = UI.togglePVECommandPanel;
    //$D("connectButton").onclick = UI.toggleConnectPanel;
    //$D("disconnectButton").onclick = UI.disconnect;
    //$D("descriptionButton").onclick = UI.toggleConnectPanel;

    $D("noVNC_clipboard_text").onfocus = UI.displayBlur;
    $D("noVNC_clipboard_text").onblur = UI.displayFocus;
    $D("noVNC_clipboard_text").onchange = UI.clipSend;
    $D("noVNC_clipboard_clear_button").onclick = UI.clipClear;

    //$D("noVNC_settings_menu").onmouseover = UI.displayBlur;
    //$D("noVNC_settings_menu").onmouseover = UI.displayFocus;
    //$D("noVNC_apply").onclick = UI.settingsApply;

    //$D("noVNC_connect_button").onclick = UI.connect;
},

// Read form control compatible setting from cookie
getSetting: function(name) {
    var val, ctrl = $D('noVNC_' + name);
    val = WebUtil.readSetting(name);
    if (val !== null && ctrl.type === 'checkbox') {
        if (val.toString().toLowerCase() in {'0':1, 'no':1, 'false':1}) {
            val = false;
        } else {
            val = true;
        }
    }
    return val;
},

// Update cookie and form control setting. If value is not set, then
// updates from control to current cookie setting.
updateSetting: function(name, value) {

    var i, ctrl = $D('noVNC_' + name);
    // Save the cookie for this session
    if (typeof value !== 'undefined') {
        WebUtil.writeSetting(name, value);
    }

    // Update the settings control
    value = UI.getSetting(name);

    if (ctrl.type === 'checkbox') {
        ctrl.checked = value;

    } else if (typeof ctrl.options !== 'undefined') {
        for (i = 0; i < ctrl.options.length; i += 1) {
            if (ctrl.options[i].value === value) {
                ctrl.selectedIndex = i;
                break;
            }
        }
    } else {
        /*Weird IE9 error leads to 'null' appearring
        in textboxes instead of ''.*/
        if (value === null) {
            value = "";
        }
        ctrl.value = value;
    }
},

// Save control setting to cookie
saveSetting: function(name) {
    var val, ctrl = $D('noVNC_' + name);
    if (ctrl.type === 'checkbox') {
        val = ctrl.checked;
    } else if (typeof ctrl.options !== 'undefined') {
        val = ctrl.options[ctrl.selectedIndex].value;
    } else {
        val = ctrl.value;
    }
    WebUtil.writeSetting(name, val);
    //Util.Debug("Setting saved '" + name + "=" + val + "'");
    return val;
},

// Initial page load read/initialization of settings
initSetting: function(name, defVal) {
    var val;

    // Check Query string followed by cookie
    val = WebUtil.getQueryVar(name);
    if (val === null) {
        val = WebUtil.readSetting(name, defVal);
    }
    UI.updateSetting(name, val);
 //Util.Debug("Setting '" + name + "' initialized to '" + val + "'");
    return val;
},

// Force a setting to be a certain value
forceSetting: function(name, val) {
    UI.updateSetting(name, val);
    return val;
},


// Show the popup status panel
togglePopupStatusPanel: function() {
    var psp = $D('noVNC_popup_status_panel');
    if (UI.popupStatusOpen === true) {
        psp.style.display = "none";
        UI.popupStatusOpen = false;
    } else {
        psp.innerHTML = $D('noVNC_status').innerHTML;
        psp.style.display = "block";
        psp.style.left = window.innerWidth/2 - 
            parseInt(window.getComputedStyle(psp, false).width)/2 -30 + "px";
        UI.popupStatusOpen = true;
    }
},

// Show the XVP panel
toggleXvpPanel: function() {
    // Close the description panel
    $D('noVNC_description').style.display = "none";
    if (UI.pveCommandsOpen === true) {
	UI.togglePVECommandPanel();
    }
    // Close settings if open
    if (UI.settingsOpen === true) {
        UI.settingsApply();
        UI.closeSettingsMenu();
    }
    // Close connection settings if open
    if (UI.connSettingsOpen === true) {
        UI.toggleConnectPanel();
    }
    // Close popup status panel if open
    if (UI.popupStatusOpen === true) {
        UI.togglePopupStatusPanel();
    }
    // Close clipboard panel if open
    if (UI.clipboardOpen === true) {
        UI.toggleClipboardPanel();
    }
    // Toggle XVP panel
    if (UI.xvpOpen === true) {
        //$D('noVNC_xvp').style.display = "none";
        //$D('xvpButton').className = "noVNC_status_button";
        UI.xvpOpen = false;
    } else {
        //$D('noVNC_xvp').style.display = "block";
        //$D('xvpButton').className = "noVNC_status_button_selected";
        UI.xvpOpen = true;
    }
},

// Show the clipboard panel
toggleClipboardPanel: function() {
    // Close the description panel
    $D('noVNC_description').style.display = "none";
    if (UI.pveCommandsOpen === true) {
	UI.togglePVECommandPanel();
    }
    if (UI.sendKeysVisible === true) {
	UI.togglePVESendKeysPanel();
    }
    // Close settings if open
    if (UI.settingsOpen === true) {
        UI.settingsApply();
        UI.closeSettingsMenu();
    }
    // Close connection settings if open
    if (UI.connSettingsOpen === true) {
        UI.toggleConnectPanel();
    }
    // Close popup status panel if open
    if (UI.popupStatusOpen === true) {
        UI.togglePopupStatusPanel();
    }
    // Close XVP panel if open
    if (UI.xvpOpen === true) {
        UI.toggleXvpPanel();
    }
    // Toggle Clipboard Panel
    if (UI.clipboardOpen === true) {
        $D('noVNC_clipboard').style.display = "none";
        $D('clipboardButton').className = "noVNC_status_button";
        UI.clipboardOpen = false;
    } else {
        $D('noVNC_clipboard').style.display = "block";
        $D('clipboardButton').className = "noVNC_status_button_selected";
        UI.clipboardOpen = true;
    }
},

// Show the connection settings panel/menu
toggleConnectPanel: function() {
    // Close the description panel
    $D('noVNC_description').style.display = "none";
    if (UI.pveCommandsOpen === true) {
	UI.togglePVECommandPanel();
    }
    // Close connection settings if open
    if (UI.settingsOpen === true) {
        UI.settingsApply();
        UI.closeSettingsMenu();
        //$D('connectButton').className = "noVNC_status_button";
    }
    // Close clipboard panel if open
    if (UI.clipboardOpen === true) {
        UI.toggleClipboardPanel();
    }
    // Close popup status panel if open
    if (UI.popupStatusOpen === true) {
        UI.togglePopupStatusPanel();
    }
    // Close XVP panel if open
    if (UI.xvpOpen === true) {
        UI.toggleXvpPanel();
    }

    // Toggle Connection Panel
    if (UI.connSettingsOpen === true) {
        $D('noVNC_controls').style.display = "none";
        //$D('connectButton').className = "noVNC_status_button";
        UI.connSettingsOpen = false;
        UI.saveSetting('host');
        UI.saveSetting('port');
        //UI.saveSetting('password');
    } else {
        $D('noVNC_controls').style.display = "block";
        //$D('connectButton').className = "noVNC_status_button_selected";
        UI.connSettingsOpen = true;
        $D('noVNC_host').focus();
    }
},

// Toggle the settings menu:
//   On open, settings are refreshed from saved cookies.
//   On close, settings are applied
toggleSettingsPanel: function() {
    // Close the description panel
    $D('noVNC_description').style.display = "none";
    if (UI.settingsOpen) {
        UI.settingsApply();
        UI.closeSettingsMenu();
    } else {
        UI.updateSetting('encrypt');
        UI.updateSetting('true_color');
        if (UI.rfb.get_display().get_cursor_uri()) {
            UI.updateSetting('cursor');
        } else {
            UI.updateSetting('cursor', !UI.isTouchDevice);
            $D('noVNC_cursor').disabled = true;
        }
        UI.updateSetting('clip');
        UI.updateSetting('shared');
        UI.updateSetting('view_only');
        UI.updateSetting('path');
        UI.updateSetting('repeaterID');
        UI.updateSetting('stylesheet');
        UI.updateSetting('logging');

        UI.openSettingsMenu();
    }
},

// Open menu
openSettingsMenu: function() {
    // Close the description panel
    $D('noVNC_description').style.display = "none";
    if (UI.pveCommandsOpen === true) {
	UI.togglePVECommandPanel();
    }
    // Close clipboard panel if open
    if (UI.clipboardOpen === true) {
        UI.toggleClipboardPanel();
    }
    // Close connection settings if open
    if (UI.connSettingsOpen === true) {
        UI.toggleConnectPanel();
    }
    // Close popup status panel if open
    if (UI.popupStatusOpen === true) {
        UI.togglePopupStatusPanel();
    }
    // Close XVP panel if open
    if (UI.xvpOpen === true) {
        UI.toggleXvpPanel();
    }
    $D('noVNC_settings').style.display = "block";
    //$D('settingsButton').className = "noVNC_status_button_selected";
    UI.settingsOpen = true;
},

// Close menu (without applying settings)
closeSettingsMenu: function() {
    $D('noVNC_settings').style.display = "none";
    //$D('settingsButton').className = "noVNC_status_button";
    UI.settingsOpen = false;
},

// Save/apply settings when 'Apply' button is pressed
settingsApply: function() {
    //Util.Debug(">> settingsApply");
    UI.saveSetting('encrypt');
    UI.saveSetting('true_color');
    if (UI.rfb.get_display().get_cursor_uri()) {
        UI.saveSetting('cursor');
    }
    UI.saveSetting('clip');
    UI.saveSetting('shared');
    UI.saveSetting('view_only');
    UI.saveSetting('path');
    UI.saveSetting('repeaterID');
    UI.saveSetting('stylesheet');
    UI.saveSetting('logging');

    // Settings with immediate (non-connected related) effect
    WebUtil.selectStylesheet(UI.getSetting('stylesheet'));
    WebUtil.init_logging(UI.getSetting('logging'));
    UI.setViewClip();
    UI.setViewDrag(UI.rfb.get_viewportDrag());
    //Util.Debug("<< settingsApply");
},



setPassword: function() {
    UI.rfb.sendPassword($D('noVNC_password').value);
    //Reset connect button.
    $D('noVNC_connect_button').value = "Connect";
    $D('noVNC_connect_button').onclick = UI.Connect;
    //Hide connection panel.
    UI.toggleConnectPanel();
    return false;
},

sendCtrlAltDel: function() {
    UI.rfb.sendCtrlAltDel();
},

xvpShutdown: function() {
    UI.rfb.xvpShutdown();
},

xvpReboot: function() {
    UI.rfb.xvpReboot();
},

xvpReset: function() {
    UI.rfb.xvpReset();
},

setMouseButton: function(num) {
    var b, blist = [0, 1,2,4], button;

    if (typeof num === 'undefined') {
        // Disable mouse buttons
        num = -1;
    }
    if (UI.rfb) {
        UI.rfb.get_mouse().set_touchButton(num);
    }

    for (b = 0; b < blist.length; b++) {
        button = $D('noVNC_mouse_button' + blist[b]);
        if (blist[b] === num) {
            button.style.display = "";
        } else {
            button.style.display = "none";
            /*
            button.style.backgroundColor = "black";
            button.style.color = "lightgray";
            button.style.backgroundColor = "";
            button.style.color = "";
            */
        }
    }
},

updateState: function(rfb, state, oldstate, msg) {
    var s, sb, c, d, cad, vd, klass;
    UI.rfb_state = state;
    switch (state) {
        case 'failed':
        case 'fatal':
            klass = "noVNC_status_error";
            break;
        case 'normal':
            klass = "noVNC_status_normal";
            break;
        case 'disconnected':
            $D('noVNC_logo').style.display = "block";
            // Fall through
        case 'loaded':
            klass = "noVNC_status_normal";
            break;
        case 'password':
            UI.toggleConnectPanel();

            $D('noVNC_connect_button').value = "Send Password";
            $D('noVNC_connect_button').onclick = UI.setPassword;
            $D('noVNC_password').focus();

            klass = "noVNC_status_warn";
            break;
        default:
            klass = "noVNC_status_warn";
            break;
    }

    if (typeof(msg) !== 'undefined') {
        $D('noVNC-control-bar').setAttribute("class", klass);
        $D('noVNC_status').innerHTML = msg;
    }

    UI.updateVisualState();
},

// Disable/enable controls depending on connection state
updateVisualState: function() {
    var connected = UI.rfb_state === 'normal' ? true : false;

    //Util.Debug(">> updateVisualState");
    $D('noVNC_encrypt').disabled = connected;
    $D('noVNC_true_color').disabled = connected;
    if (UI.rfb && UI.rfb.get_display() &&
        UI.rfb.get_display().get_cursor_uri()) {
        $D('noVNC_cursor').disabled = connected;
    } else {
        UI.updateSetting('cursor', !UI.isTouchDevice);
        $D('noVNC_cursor').disabled = true;
    }
    $D('noVNC_shared').disabled = connected;
    $D('noVNC_view_only').disabled = connected;
    $D('noVNC_path').disabled = connected;
    $D('noVNC_repeaterID').disabled = connected;

    if (connected) {
        UI.setViewClip();
        UI.setMouseButton(1);
        $D('clipboardButton').style.display =  (UI.consoletype !== 'kvm') ? "inline" : "none";
        $D('showKeyboard').style.display = "inline";
        $D('noVNC_extra_keys').style.display = "";
    } else {
        UI.setMouseButton();
        $D('clipboardButton').style.display = "none";
        $D('showKeyboard').style.display = "none";
        $D('noVNC_extra_keys').style.display = "none";
        UI.updateXvpVisualState(0);
    }
    
    // State change disables viewport dragging.
    // It is enabled (toggled) by direct click on the button
    UI.setViewDrag(false);

    switch (UI.rfb_state) {
        case 'fatal':
        case 'failed':
        case 'loaded':
        case 'disconnected':
            //$D('connectButton').style.display = "";
            //$D('disconnectButton').style.display = "none";
            break;
        default:
            //$D('connectButton').style.display = "none";
            //$D('disconnectButton').style.display = "";
            break;
    }

    //Util.Debug("<< updateVisualState");
},

// Disable/enable XVP button
updateXvpVisualState: function(ver) {
    return;
    if (ver >= 1) {
        //$D('xvpButton').style.display = 'inline';
    } else {
        //$D('xvpButton').style.display = 'none';
        // Close XVP panel if open
        if (UI.xvpOpen === true) {
            UI.toggleXvpPanel();
        }
    }
},


// Display the desktop name in the document title
updateDocumentTitle: function(rfb, name) {
    document.title = name + " - noVNC";
},


clipReceive: function(rfb, text) {
    Util.Debug(">> UI.clipReceive: " + text.substr(0,40) + "...");
    $D('noVNC_clipboard_text').value = text;
    Util.Debug("<< UI.clipReceive");
},


connect: function() {
    var host, port, password, path;

    UI.closeSettingsMenu();
    UI.toggleConnectPanel();

    host = $D('noVNC_host').value;
    port = $D('noVNC_port').value;
    password = $D('noVNC_password').value;
    path = $D('noVNC_path').value;
    if ((!host) || (!port)) {
        throw("Must set host and port");
    }

    UI.rfb.set_encrypt(UI.getSetting('encrypt'));
    UI.rfb.set_true_color(UI.getSetting('true_color'));
    UI.rfb.set_local_cursor(UI.getSetting('cursor'));
    UI.rfb.set_shared(UI.getSetting('shared'));
    UI.rfb.set_view_only(UI.getSetting('view_only'));
    UI.rfb.set_repeaterID(UI.getSetting('repeaterID'));

    UI.rfb.connect(host, port, password, path);

    //Close dialog.
    setTimeout(UI.setBarPosition, 100);
    $D('noVNC_logo').style.display = "none";
},

disconnect: function() {
    UI.closeSettingsMenu();
    UI.rfb.disconnect();

    $D('noVNC_logo').style.display = "block";
    UI.connSettingsOpen = false;
    UI.toggleConnectPanel();
},

displayBlur: function() {
    UI.rfb.get_keyboard().set_focused(false);
    UI.rfb.get_mouse().set_focused(false);
},

displayFocus: function() {
    UI.rfb.get_keyboard().set_focused(true);
    UI.rfb.get_mouse().set_focused(true);
},

clipClear: function() {
    $D('noVNC_clipboard_text').value = "";
    UI.rfb.clipboardPasteFrom("");
},

clipSend: function() {
    var text = $D('noVNC_clipboard_text').value;
    Util.Debug(">> UI.clipSend: " + text.substr(0,40) + "...");
    UI.rfb.clipboardPasteFrom(text);
    Util.Debug("<< UI.clipSend");
},


// Enable/disable and configure viewport clipping
setViewClip: function(clip) {
    var display, cur_clip, pos, new_w, new_h;

    if (UI.rfb) {
        display = UI.rfb.get_display();
    } else {
        return;
    }

    cur_clip = display.get_viewport();

    if (typeof(clip) !== 'boolean') {
        // Use current setting
        clip = UI.getSetting('clip');
    }

    if (clip && !cur_clip) {
        // Turn clipping on
        UI.updateSetting('clip', true);
    } else if (!clip && cur_clip) {
        // Turn clipping off
        UI.updateSetting('clip', false);
        display.set_viewport(false);
        $D('noVNC_canvas').style.position = 'static';
        display.viewportChange();
    }
    if (UI.getSetting('clip')) {
        // If clipping, update clipping settings
        $D('noVNC_canvas').style.position = 'absolute';
        pos = Util.getPosition($D('noVNC_canvas'));
        new_w = window.innerWidth - pos.x;
        new_h = window.innerHeight - pos.y;
        display.set_viewport(true);
        display.viewportChange(0, 0, new_w, new_h);
    }
},

// Toggle/set/unset the viewport drag/move button
setViewDrag: function(drag) {
    var vmb = $D('noVNC_view_drag_button');
    if (!UI.rfb) { return; }

    if (UI.rfb_state === 'normal' &&
        UI.rfb.get_display().get_viewport()) {
        vmb.style.display = "inline";
    } else {
        vmb.style.display = "none";
    }

    if (typeof(drag) === "undefined" ||
        typeof(drag) === "object") {
        // If not specified, then toggle
        drag = !UI.rfb.get_viewportDrag();
    }
    if (drag) {
        vmb.className = "noVNC_status_button_selected";
        UI.rfb.set_viewportDrag(true);
    } else {
        vmb.className = "noVNC_status_button";
        UI.rfb.set_viewportDrag(false);
    }
},

// On touch devices, show the OS keyboard
showKeyboard: function() {
    var kbi, skb, l;
    kbi = $D('keyboardinput');
    skb = $D('showKeyboard');
    l = kbi.value.length;
    if(UI.keyboardVisible === false) {
        kbi.focus();
        try { kbi.setSelectionRange(l, l); } // Move the caret to the end
        catch (err) {} // setSelectionRange is undefined in Google Chrome
        UI.keyboardVisible = true;
        skb.className = "noVNC_status_button_selected";
    } else if(UI.keyboardVisible === true) {
        kbi.blur();
        skb.className = "noVNC_status_button";
        UI.keyboardVisible = false;
    }
},

keepKeyboard: function() {
    clearTimeout(UI.hideKeyboardTimeout);
    if(UI.keyboardVisible === true) {
        $D('keyboardinput').focus();
        $D('showKeyboard').className = "noVNC_status_button_selected";
    } else if(UI.keyboardVisible === false) {
        $D('keyboardinput').blur();
        $D('showKeyboard').className = "noVNC_status_button";
    }
},

keyboardinputReset: function() {
    var kbi = $D('keyboardinput');
    kbi.value = Array(UI.defaultKeyboardinputLen).join("_");
    UI.lastKeyboardinput = kbi.value;
},

// When normal keyboard events are left uncought, use the input events from
// the keyboardinput element instead and generate the corresponding key events.
// This code is required since some browsers on Android are inconsistent in
// sending keyCodes in the normal keyboard events when using on screen keyboards.
keyInput: function(event) {
    var newValue, oldValue, newLen, oldLen;
    newValue = event.target.value;
    oldValue = UI.lastKeyboardinput;

    try {
        // Try to check caret position since whitespace at the end
        // will not be considered by value.length in some browsers
        newLen = Math.max(event.target.selectionStart, newValue.length);
    } catch (err) {
        // selectionStart is undefined in Google Chrome
        newLen = newValue.length;
    }
    oldLen = oldValue.length;

    var backspaces;
    var inputs = newLen - oldLen;
    if (inputs < 0)
        backspaces = -inputs;
    else
        backspaces = 0;

    // Compare the old string with the new to account for
    // text-corrections or other input that modify existing text
    for (var i = 0; i < Math.min(oldLen, newLen); i++) {
        if (newValue.charAt(i) != oldValue.charAt(i)) {
            inputs = newLen - i;
            backspaces = oldLen - i;
            break;
        }
    }

    // Send the key events
    for (var i = 0; i < backspaces; i++)
        UI.rfb.sendKey(XK_BackSpace);
    for (var i = newLen - inputs; i < newLen; i++)
        UI.rfb.sendKey(newValue.charCodeAt(i));

    // Control the text content length in the keyboardinput element
    if (newLen > 2 * UI.defaultKeyboardinputLen) {
        UI.keyboardinputReset();
    } else if (newLen < 1) {
        // There always have to be some text in the keyboardinput
        // element with which backspace can interact.
        UI.keyboardinputReset();
        // This sometimes causes the keyboard to disappear for a second
        // but it is required for the android keyboard to recognize that
        // text has been added to the field
        event.target.blur();
        // This has to be ran outside of the input handler in order to work
        setTimeout(function() { UI.keepKeyboard(); }, 0);

    } else {
        UI.lastKeyboardinput = newValue;
    }
},

keyInputBlur: function() {
    $D('showKeyboard').className = "noVNC_status_button";
    //Weird bug in iOS if you change keyboardVisible
    //here it does not actually occur so next time
    //you click keyboard icon it doesnt work.
    UI.hideKeyboardTimeout = setTimeout(function() { UI.setKeyboard(); },100);
},

showExtraKeys: function() {
    UI.keepKeyboard();
    if(UI.extraKeysVisible === false) {
        $D('toggleCtrlButton').style.display = "inline";
        $D('toggleAltButton').style.display = "inline";
        $D('sendTabButton').style.display = "inline";
        $D('sendEscButton').style.display = "inline";
	$D('sendCtrlAltDelButton').style.display = (UI.consoletype === 'kvm') ? "inline" : "none";
        $D('showExtraKeysButton').className = "noVNC_status_button_selected";
        UI.extraKeysVisible = true;
    } else if(UI.extraKeysVisible === true) {
        $D('toggleCtrlButton').style.display = "";
        $D('toggleAltButton').style.display = "";
        $D('sendTabButton').style.display = "";
        $D('sendEscButton').style.display = "";
        $D('sendCtrlAltDelButton').style.display = "";
        $D('showExtraKeysButton').className = "noVNC_status_button";
        UI.extraKeysVisible = false;
    }
},

toggleCtrl: function() {
    UI.keepKeyboard();
    if(UI.ctrlOn === false) {
        UI.rfb.sendKey(XK_Control_L, true);
        $D('toggleCtrlButton').className = "noVNC_status_button_selected";
        UI.ctrlOn = true;
    } else if(UI.ctrlOn === true) {
        UI.rfb.sendKey(XK_Control_L, false);
        $D('toggleCtrlButton').className = "noVNC_status_button";
        UI.ctrlOn = false;
    }
},

toggleAlt: function() {
    UI.keepKeyboard();
    if(UI.altOn === false) {
        UI.rfb.sendKey(XK_Alt_L, true);
        $D('toggleAltButton').className = "noVNC_status_button_selected";
        UI.altOn = true;
    } else if(UI.altOn === true) {
        UI.rfb.sendKey(XK_Alt_L, false);
        $D('toggleAltButton').className = "noVNC_status_button";
        UI.altOn = false;
    }
},

sendTab: function() {
    UI.keepKeyboard();
    UI.rfb.sendKey(XK_Tab);
},

sendEsc: function() {
    UI.keepKeyboard();
    UI.rfb.sendKey(XK_Escape);
},

setKeyboard: function() {
    UI.keyboardVisible = false;
},

// iOS < Version 5 does not support position fixed. Javascript workaround:
setOnscroll: function() {
    window.onscroll = function() {
        UI.setBarPosition();
    };
},

setResize: function () {
    window.onResize = function() {
        UI.setBarPosition();
    };
},

//Helper to add options to dropdown.
addOption: function(selectbox,text,value )
{
    var optn = document.createElement("OPTION");
    optn.text = text;
    optn.value = value;
    selectbox.options.add(optn);
},

setBarPosition: function() {
    $D('noVNC-control-bar').style.top = (window.pageYOffset) + 'px';
    $D('noVNC_mobile_buttons').style.left = (window.pageXOffset) + 'px';

    var vncwidth = $D('noVNC_screen').style.offsetWidth;
    $D('noVNC-control-bar').style.width = vncwidth + 'px';
}

};