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libtdevnc/webclients/novnc/include/ui.js

980 lines
36 KiB

/*
* 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)
*
* See README.md for usage and integration instructions.
*/
/* jslint white: false, browser: true */
/* global window, $D, Util, WebUtil, RFB, Display */
var UI;
(function () {
"use strict";
// Load supporting scripts
window.onscriptsload = function () { UI.load(); };
window.onload = function () { UI.keyboardinputReset(); };
Util.load_scripts(["webutil.js", "base64.js", "websock.js", "des.js",
"keysymdef.js", "keyboard.js", "input.js", "display.js",
"jsunzip.js", "rfb.js", "keysym.js"]);
UI = {
rfb_state : 'loaded',
settingsOpen : false,
connSettingsOpen : false,
popupStatusOpen : false,
clipboardOpen: false,
keyboardVisible: false,
hideKeyboardTimeout: null,
lastKeyboardinput: null,
defaultKeyboardinputLen: 100,
extraKeysVisible: false,
ctrlOn: false,
altOn: false,
isTouchDevice: false,
// Setup rfb object, load settings from browser storage, then call
// UI.init to setup the UI/menus
load: function (callback) {
WebUtil.initSettings(UI.start, callback);
},
// Render default UI and initialize settings menu
start: function(callback) {
UI.isTouchDevice = 'ontouchstart' in document.documentElement;
// Stylesheet selection dropdown
var sheet = WebUtil.selectStylesheet();
var sheets = WebUtil.getStylesheets();
var i;
for (i = 0; i < sheets.length; i += 1) {
UI.addOption($D('noVNC_stylesheet'),sheets[i].title, sheets[i].title);
}
// Logging selection dropdown
var 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'));
// if port == 80 (or 443) then it won't be present and should be
// set manually
var port = window.location.port;
if (!port) {
if (window.location.protocol.substring(0,5) == 'https') {
port = 443;
}
else if (window.location.protocol.substring(0,4) == 'http') {
port = 80;
}
}
/* Populate the controls if defaults are provided in the URL */
UI.initSetting('host', window.location.hostname);
UI.initSetting('port', port);
UI.initSetting('password', '');
UI.initSetting('encrypt', (window.location.protocol === "https:"));
UI.initSetting('true_color', true);
UI.initSetting('cursor', !UI.isTouchDevice);
UI.initSetting('shared', true);
UI.initSetting('view_only', false);
UI.initSetting('path', 'websockify');
UI.initSetting('repeaterID', '');
UI.rfb = new RFB({'target': $D('noVNC_canvas'),
'onUpdateState': UI.updateState,
'onXvpInit': UI.updateXvpVisualState,
'onClipboard': UI.clipReceive,
'onDesktopName': UI.updateDocumentTitle});
var autoconnect = WebUtil.getQueryVar('autoconnect', false);
if (autoconnect === 'true' || autoconnect == '1') {
autoconnect = true;
UI.connect();
} else {
autoconnect = false;
}
UI.updateVisualState();
// Show mouse selector buttons on touch screen devices
if (UI.isTouchDevice) {
// Show mobile buttons
$D('noVNC_mobile_buttons').style.display = "inline";
UI.setMouseButton();
// Remove the address bar
setTimeout(function() { window.scrollTo(0, 1); }, 100);
UI.forceSetting('clip', true);
$D('noVNC_clip').disabled = true;
} else {
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("sendCtrlAltDelButton").onclick = UI.sendCtrlAltDel;
$D("xvpShutdownButton").onclick = UI.xvpShutdown;
$D("xvpRebootButton").onclick = UI.xvpReboot;
$D("xvpResetButton").onclick = UI.xvpReset;
$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("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 ctrl = $D('noVNC_' + name);
var 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) {
// Save the cookie for this session
if (typeof value !== 'undefined') {
WebUtil.writeSetting(name, value);
}
// Update the settings control
value = UI.getSetting(name);
var ctrl = $D('noVNC_' + name);
if (ctrl.type === 'checkbox') {
ctrl.checked = value;
} else if (typeof ctrl.options !== 'undefined') {
for (var 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) {
// Check Query string followed by cookie
var val = WebUtil.getQueryVar(name);
if (val === null) {
val = WebUtil.readSetting(name, defVal);
}
UI.updateSetting(name, 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";
// 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";
// 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";
// 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";
// 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) {
if (typeof num === 'undefined') {
// Disable mouse buttons
num = -1;
}
if (UI.rfb) {
UI.rfb.get_mouse().set_touchButton(num);
}
var blist = [0, 1,2,4];
for (var b = 0; b < blist.length; b++) {
var button = $D('noVNC_mouse_button' + blist[b]);
if (blist[b] === num) {
button.style.display = "";
} else {
button.style.display = "none";
}
}
},
updateState: function(rfb, state, oldstate, msg) {
UI.rfb_state = state;
var klass;
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";
/* falls 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 = "inline";
$D('showKeyboard').style.display = "inline";
$D('noVNC_extra_keys').style.display = "";
$D('sendCtrlAltDelButton').style.display = "inline";
} else {
UI.setMouseButton();
$D('clipboardButton').style.display = "none";
$D('showKeyboard').style.display = "none";
$D('noVNC_extra_keys').style.display = "none";
$D('sendCtrlAltDelButton').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) {
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() {
UI.closeSettingsMenu();
UI.toggleConnectPanel();
var host = $D('noVNC_host').value;
var port = $D('noVNC_port').value;
var password = $D('noVNC_password').value;
var path = $D('noVNC_path').value;
if ((!host) || (!port)) {
throw new Error("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;
if (UI.rfb) {
display = UI.rfb.get_display();
} else {
return;
}
var 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
$D('noVNC_canvas').style.position = 'absolute';
var pos = Util.getPosition($D('noVNC_canvas'));
var new_w = window.innerWidth - pos.x;
var 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 = $D('keyboardinput');
var skb = $D('showKeyboard');
var 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 = new 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 = event.target.value;
var oldValue = UI.lastKeyboardinput;
var newLen;
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;
}
var 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
var i;
for (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 (i = 0; i < backspaces; i++) {
UI.rfb.sendKey(XK_BackSpace);
}
for (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('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('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';
}
};
})();