Add virtual keyboard

[perso/Immae/Projets/Cryptomonnaies/BIP39.git] / src / js / jquery.keyboard.js

/*! jQuery UI Virtual Keyboard v1.26.22 *//*
Author: Jeremy Satterfield
Maintained: Rob Garrison (Mottie on github)
Licensed under the MIT License

An on-screen virtual keyboard embedded within the browser window which
will popup when a specified entry field is focused. The user can then
type and preview their input before Accepting or Canceling.

This plugin adds default class names to match jQuery UI theme styling.
Bootstrap & custom themes may also be applied - See
https://github.com/Mottie/Keyboard#themes

Requires:
	jQuery v1.4.3+
	Caret plugin (included)
Optional:
	jQuery UI (position utility only) & CSS theme
	jQuery mousewheel

Setup/Usage:
	Please refer to https://github.com/Mottie/Keyboard/wiki

-----------------------------------------
Caret code modified from jquery.caret.1.02.js
Licensed under the MIT License:
http://www.opensource.org/licenses/mit-license.php
-----------------------------------------
*/
/*jshint browser:true, jquery:true, unused:false */
/*global require:false, define:false, module:false */
;(function (factory) {
	if (typeof define === 'function' && define.amd) {
		define(['jquery'], factory);
	} else if (typeof module === 'object' && typeof module.exports === 'object') {
		module.exports = factory(require('jquery'));
	} else {
		factory(jQuery);
	}
}(function ($) {
	'use strict';
	var $keyboard = $.keyboard = function (el, options) {
	var o, base = this;

	base.version = '1.26.22';

	// Access to jQuery and DOM versions of element
	base.$el = $(el);
	base.el = el;

	// Add a reverse reference to the DOM object
	base.$el.data('keyboard', base);

	base.init = function () {
		base.initialized = false;
		var k, position, tmp,
			kbcss = $keyboard.css,
			kbevents = $keyboard.events;
		base.settings = options || {};
		// shallow copy position to prevent performance issues; see #357
		if (options && options.position) {
			position = $.extend({}, options.position);
			options.position = null;
		}
		base.options = o = $.extend(true, {}, $keyboard.defaultOptions, options);
		if (position) {
			o.position = position;
			options.position = position;
		}

		// keyboard is active (not destroyed);
		base.el.active = true;
		// unique keyboard namespace
		base.namespace = '.keyboard' + Math.random().toString(16).slice(2);
		// extension namespaces added here (to unbind listeners on base.$el upon destroy)
		base.extensionNamespace = [];
		// Shift and Alt key toggles, sets is true if a layout has more than one keyset
		// used for mousewheel message
		base.shiftActive = base.altActive = base.metaActive = base.sets = base.capsLock = false;
		// Class names of the basic key set - meta keysets are handled by the keyname
		base.rows = ['', '-shift', '-alt', '-alt-shift'];

		base.inPlaceholder = base.$el.attr('placeholder') || '';
		// html 5 placeholder/watermark
		base.watermark = $keyboard.watermark && base.inPlaceholder !== '';
		// convert mouse repeater rate (characters per second) into a time in milliseconds.
		base.repeatTime = 1000 / (o.repeatRate || 20);
		// delay in ms to prevent mousedown & touchstart from both firing events at the same time
		o.preventDoubleEventTime = o.preventDoubleEventTime || 100;
		// flag indication that a keyboard is open
		base.isOpen = false;
		// is mousewheel plugin loaded?
		base.wheel = $.isFunction($.fn.mousewheel);
		// special character in regex that need to be escaped
		base.escapeRegex = /[-\/\\^$*+?.()|[\]{}]/g;

		// keyCode of keys always allowed to be typed
		k = $keyboard.keyCodes;
		// base.alwaysAllowed = [20,33,34,35,36,37,38,39,40,45,46];
		base.alwaysAllowed = [
			k.capsLock,
			k.pageUp,
			k.pageDown,
			k.end,
			k.home,
			k.left,
			k.up,
			k.right,
			k.down,
			k.insert,
			k.delete
		];
		base.$keyboard = [];
		// keyboard enabled; set to false on destroy
		base.enabled = true;

		base.checkCaret = (o.lockInput || $keyboard.checkCaretSupport());

		base.last = {
			start: 0,
			end: 0,
			key: '',
			val: '',
			preVal: '',
			layout: '',
			virtual: true,
			keyset: [false, false, false], // [shift, alt, meta]
			wheel_$Keys: null,
			wheelIndex: 0,
			wheelLayers: []
		};
		// used when building the keyboard - [keyset element, row, index]
		base.temp = ['', 0, 0];

		// Callbacks
		$.each([
			kbevents.kbInit,
			kbevents.kbBeforeVisible,
			kbevents.kbVisible,
			kbevents.kbHidden,
			kbevents.inputCanceled,
			kbevents.inputAccepted,
			kbevents.kbBeforeClose,
			kbevents.inputRestricted
		], function (i, callback) {
			if ($.isFunction(o[callback])) {
				// bind callback functions within options to triggered events
				base.$el.bind(callback + base.namespace + 'callbacks', o[callback]);
			}
		});

		// Close with esc key & clicking outside
		if (o.alwaysOpen) {
			o.stayOpen = true;
		}

		tmp = $(document);
		if (base.el.ownerDocument !== document) {
			tmp = tmp.add(base.el.ownerDocument);
		}

		var bindings = 'keyup checkkeyboard mousedown touchstart ';
		if (o.closeByClickEvent) {
			bindings += 'click ';
		}
		// debounce bindings... see #542
		tmp.bind(bindings.split(' ').join(base.namespace + ' '), function(e) {
			clearTimeout(base.timer3);
			base.timer3 = setTimeout(function() {
				base.checkClose(e);
			}, 1);
		});

		// Display keyboard on focus
		base.$el
			.addClass(kbcss.input + ' ' + o.css.input)
			.attr({
				'aria-haspopup': 'true',
				'role': 'textbox'
			});

		// set lockInput if the element is readonly; or make the element readonly if lockInput is set
		if (o.lockInput || base.el.readOnly) {
			o.lockInput = true;
			base.$el
				.addClass(kbcss.locked)
				.attr({
					'readonly': 'readonly'
				});
		}
		// add disabled/readonly class - dynamically updated on reveal
		if (base.$el.is(':disabled') || (base.$el.attr('readonly') &&
				!base.$el.hasClass(kbcss.locked))) {
			base.$el.addClass(kbcss.noKeyboard);
		}
		if (o.openOn) {
			base.bindFocus();
		}

		// Add placeholder if not supported by the browser
		if (!base.watermark && base.$el.val() === '' && base.inPlaceholder !== '' &&
			base.$el.attr('placeholder') !== '') {
			base.$el
				.addClass(kbcss.placeholder) // css watermark style (darker text)
				.val(base.inPlaceholder);
		}

		base.$el.trigger(kbevents.kbInit, [base, base.el]);

		// initialized with keyboard open
		if (o.alwaysOpen) {
			base.reveal();
		}
		base.initialized = true;
	};

	base.toggle = function () {
		if (!base.hasKeyboard()) { return; }
		var $toggle = base.$keyboard.find('.' + $keyboard.css.keyToggle),
			locked = !base.enabled;
		// prevent physical keyboard from working
		base.$preview.prop('readonly', locked || base.options.lockInput);
		// disable all buttons
		base.$keyboard
			.toggleClass($keyboard.css.keyDisabled, locked)
			.find('.' + $keyboard.css.keyButton)
			.not($toggle)
			.prop('disabled', locked)
			.attr('aria-disabled', locked);
		$toggle.toggleClass($keyboard.css.keyDisabled, locked);
		// stop auto typing
		if (locked && base.typing_options) {
			base.typing_options.text = '';
		}
		// allow chaining
		return base;
	};

	base.setCurrent = function () {
		var kbcss = $keyboard.css,
			// close any "isCurrent" keyboard (just in case they are always open)
			$current = $('.' + kbcss.isCurrent),
			kb = $current.data('keyboard');
		// close keyboard, if not self
		if (!$.isEmptyObject(kb) && kb.el !== base.el) {
			kb.close(kb.options.autoAccept ? 'true' : false);
		}
		$current.removeClass(kbcss.isCurrent);
		// ui-keyboard-has-focus is applied in case multiple keyboards have
		// alwaysOpen = true and are stacked
		$('.' + kbcss.hasFocus).removeClass(kbcss.hasFocus);

		base.$el.addClass(kbcss.isCurrent);
		base.$keyboard.addClass(kbcss.hasFocus);
		base.isCurrent(true);
		base.isOpen = true;
	};

	base.isCurrent = function (set) {
		var cur = $keyboard.currentKeyboard || false;
		if (set) {
			cur = $keyboard.currentKeyboard = base.el;
		} else if (set === false && cur === base.el) {
			cur = $keyboard.currentKeyboard = '';
		}
		return cur === base.el;
	};

	base.hasKeyboard = function () {
		return base.$keyboard && base.$keyboard.length > 0;
	};

	base.isVisible = function () {
		return base.hasKeyboard() ? base.$keyboard.is(':visible') : false;
	};

	base.focusOn = function () {
		if (!base && base.el.active) {
			// keyboard was destroyed
			return;
		}
		if (!base.isVisible()) {
			clearTimeout(base.timer);
			base.reveal();
		} else {
			// keyboard already open, make it the current keyboard
			base.setCurrent();
		}
	};

	// add redraw method to make API more clear
	base.redraw = function (layout) {
		if (layout) {
			// allow updating the layout by calling redraw
			base.options.layout = layout;
		}
		// update keyboard after a layout change
		if (base.$keyboard.length) {

			base.last.preVal = '' + base.last.val;
			base.last.val = base.$preview && base.$preview.val() || base.$el.val();
			base.$el.val( base.last.val );

			base.removeKeyboard();
			base.shiftActive = base.altActive = base.metaActive = false;
		}
		base.isOpen = o.alwaysOpen;
		base.reveal(true);
		return base;
	};

	base.reveal = function (redraw) {
		var alreadyOpen = base.isOpen,
			kbcss = $keyboard.css;
		base.opening = !alreadyOpen;
		// remove all 'extra' keyboards by calling close function
		$('.' + kbcss.keyboard).not('.' + kbcss.alwaysOpen).each(function(){
			var kb = $(this).data('keyboard');
			if (!$.isEmptyObject(kb)) {
				// this closes previous keyboard when clicking another input - see #515
				kb.close(kb.options.autoAccept ? 'true' : false);
			}
		});

		// Don't open if disabled
		if (base.$el.is(':disabled') || (base.$el.attr('readonly') && !base.$el.hasClass(kbcss.locked))) {
			base.$el.addClass(kbcss.noKeyboard);
			return;
		} else {
			base.$el.removeClass(kbcss.noKeyboard);
		}

		// Unbind focus to prevent recursion - openOn may be empty if keyboard is opened externally
		if (o.openOn) {
			base.$el.unbind($.trim((o.openOn + ' ').split(/\s+/).join(base.namespace + ' ')));
		}

		// build keyboard if it doesn't exist; or attach keyboard if it was removed, but not cleared
		if (!base.$keyboard || base.$keyboard &&
			(!base.$keyboard.length || $.contains(document.body, base.$keyboard[0]))) {
			base.startup();
		}

		// clear watermark
		if (!base.watermark && base.el.value === base.inPlaceholder) {
			base.$el
				.removeClass(kbcss.placeholder)
				.val('');
		}
		// save starting content, in case we cancel
		base.originalContent = base.$el.val();
		base.$preview.val(base.originalContent);

		// disable/enable accept button
		if (o.acceptValid) {
			base.checkValid();
		}

		if (o.resetDefault) {
			base.shiftActive = base.altActive = base.metaActive = false;
		}
		base.showSet();

		// beforeVisible event
		if (!base.isVisible()) {
			base.$el.trigger($keyboard.events.kbBeforeVisible, [base, base.el]);
		}
		if (
			base.initialized ||
			o.initialFocus ||
			( !o.initialFocus && base.$el.hasClass($keyboard.css.initialFocus) )
		) {
			base.setCurrent();
		}
		// update keyboard - enabled or disabled?
		base.toggle();

		// show keyboard
		base.$keyboard.show();

		// adjust keyboard preview window width - save width so IE won't keep expanding (fix issue #6)
		if (o.usePreview && $keyboard.msie) {
			if (typeof base.width === 'undefined') {
				base.$preview.hide(); // preview is 100% browser width in IE7, so hide the damn thing
				base.width = Math.ceil(base.$keyboard.width()); // set input width to match the widest keyboard row
				base.$preview.show();
			}
			base.$preview.width(base.width);
		}

		base.reposition();

		base.checkDecimal();

		// get preview area line height
		// add roughly 4px to get line height from font height, works well for font-sizes from 14-36px
		// needed for textareas
		base.lineHeight = parseInt(base.$preview.css('lineHeight'), 10) ||
			parseInt(base.$preview.css('font-size'), 10) + 4;

		if (o.caretToEnd) {
			base.saveCaret(base.originalContent.length, base.originalContent.length);
		}

		// IE caret haxx0rs
		if ($keyboard.allie) {
			// sometimes end = 0 while start is > 0
			if (base.last.end === 0 && base.last.start > 0) {
				base.last.end = base.last.start;
			}
			// IE will have start -1, end of 0 when not focused (see demo: https://jsfiddle.net/Mottie/fgryQ/3/)
			if (base.last.start < 0) {
				// ensure caret is at the end of the text (needed for IE)
				base.last.start = base.last.end = base.originalContent.length;
			}
		}

		if (alreadyOpen || redraw) {
			// restore caret position (userClosed)
			$keyboard.caret(base.$preview, base.last);
			return base;
		}

		// opening keyboard flag; delay allows switching between keyboards without immediately closing
		// the keyboard
		base.timer2 = setTimeout(function () {
			var undef;
			base.opening = false;
			// Number inputs don't support selectionStart and selectionEnd
			// Number/email inputs don't support selectionStart and selectionEnd
			if (!/(number|email)/i.test(base.el.type) && !o.caretToEnd) {
				// caret position is always 0,0 in webkit; and nothing is focused at this point... odd
				// save caret position in the input to transfer it to the preview
				// inside delay to get correct caret position
				base.saveCaret(undef, undef, base.$el);
			}
			if (o.initialFocus || base.$el.hasClass($keyboard.css.initialFocus)) {
				$keyboard.caret(base.$preview, base.last);
			}
			// save event time for keyboards with stayOpen: true
			base.last.eventTime = new Date().getTime();
			base.$el.trigger($keyboard.events.kbVisible, [base, base.el]);
			base.timer = setTimeout(function () {
				// get updated caret information after visible event - fixes #331
				if (base) { // Check if base exists, this is a case when destroy is called, before timers fire
					base.saveCaret();
				}
			}, 200);
		}, 10);
		// return base to allow chaining in typing extension
		return base;
	};

	base.updateLanguage = function () {
		// change language if layout is named something like 'french-azerty-1'
		var layouts = $keyboard.layouts,
			lang = o.language || layouts[o.layout] && layouts[o.layout].lang &&
				layouts[o.layout].lang || [o.language || 'en'],
			kblang = $keyboard.language;

		// some languages include a dash, e.g. 'en-gb' or 'fr-ca'
		// allow o.language to be a string or array...
		// array is for future expansion where a layout can be set for multiple languages
		lang = ($.isArray(lang) ? lang[0] : lang).split('-')[0];

		// set keyboard language
		o.display = $.extend(true, {},
			kblang.en.display,
			kblang[lang] && kblang[lang].display || {},
			base.settings.display
		);
		o.combos = $.extend(true, {},
			kblang.en.combos,
			kblang[lang] && kblang[lang].combos || {},
			base.settings.combos
		);
		o.wheelMessage = kblang[lang] && kblang[lang].wheelMessage || kblang.en.wheelMessage;
		// rtl can be in the layout or in the language definition; defaults to false
		o.rtl = layouts[o.layout] && layouts[o.layout].rtl || kblang[lang] && kblang[lang].rtl || false;

		// save default regex (in case loading another layout changes it)
		base.regex = kblang[lang] && kblang[lang].comboRegex || $keyboard.comboRegex;
		// determine if US '.' or European ',' system being used
		base.decimal = /^\./.test(o.display.dec);
		base.$el
			.toggleClass('rtl', o.rtl)
			.css('direction', o.rtl ? 'rtl' : '');
	};

	base.startup = function () {
		var kbcss = $keyboard.css;
		// ensure base.$preview is defined; but don't overwrite it if keyboard is always visible
		if (!((o.alwaysOpen || o.userClosed) && base.$preview)) {
			base.makePreview();
		}
		if (!base.hasKeyboard()) {
			// custom layout - create a unique layout name based on the hash
			if (o.layout === 'custom') {
				o.layoutHash = 'custom' + base.customHash();
			}
			base.layout = o.layout === 'custom' ? o.layoutHash : o.layout;
			base.last.layout = base.layout;

			base.updateLanguage();
			if (typeof $keyboard.builtLayouts[base.layout] === 'undefined') {
				if ($.isFunction(o.create)) {
					// create must call buildKeyboard() function; or create it's own keyboard
					base.$keyboard = o.create(base);
				} else if (!base.$keyboard.length) {
					base.buildKeyboard(base.layout, true);
				}
			}
			base.$keyboard = $keyboard.builtLayouts[base.layout].$keyboard.clone();
			base.$keyboard.data('keyboard', base);
			if ((base.el.id || '') !== '') {
				// add ID to keyboard for styling purposes
				base.$keyboard.attr('id', base.el.id + $keyboard.css.idSuffix);
			}

			base.makePreview();
		}

		base.$decBtn = base.$keyboard.find('.' + kbcss.keyPrefix + 'dec');
		// add enter to allowed keys; fixes #190
		if (o.enterNavigation || base.el.nodeName === 'TEXTAREA') {
			base.alwaysAllowed.push(13);
		}

		base.bindKeyboard();

		base.$keyboard.appendTo(o.appendLocally ? base.$el.parent() : o.appendTo || 'body');

		base.bindKeys();

		// reposition keyboard on window resize
		if (o.reposition && $.ui && $.ui.position && o.appendTo == 'body') {
			$(window).bind('resize' + base.namespace, function () {
				base.reposition();
			});
		}

	};

	base.reposition = function () {
		base.position = $.isEmptyObject(o.position) ? false : o.position;
		// position after keyboard is visible (required for UI position utility)
		// and appropriately sized
		if ($.ui && $.ui.position && base.position) {
			base.position.of =
				// get single target position
				base.position.of ||
				// OR target stored in element data (multiple targets)
				base.$el.data('keyboardPosition') ||
				// OR default @ element
				base.$el;
			base.position.collision = base.position.collision || 'flipfit flipfit';
			base.position.at = o.usePreview ? o.position.at : o.position.at2;
			if (base.isVisible()) {
				base.$keyboard.position(base.position);
			}
		}
		// make chainable
		return base;
	};

	base.makePreview = function () {
		if (o.usePreview) {
			var indx, attrs, attr, removedAttr,
				kbcss = $keyboard.css;
			base.$preview = base.$el.clone(false)
				.data('keyboard', base)
				.removeClass(kbcss.placeholder + ' ' + kbcss.input)
				.addClass(kbcss.preview + ' ' + o.css.input)
				.attr('tabindex', '-1')
				.show(); // for hidden inputs
			base.preview = base.$preview[0];

			// Switch the number input field to text so the caret positioning will work again
			if (base.preview.type === 'number') {
				base.preview.type = 'text';
			}

			// remove extraneous attributes.
			removedAttr = /^(data-|id|aria-haspopup)/i;
			attrs = base.$preview.get(0).attributes;
			for (indx = attrs.length - 1; indx >= 0; indx--) {
				attr = attrs[indx] && attrs[indx].name;
				if (removedAttr.test(attr)) {
					// remove data-attributes - see #351
					base.preview.removeAttribute(attr);
				}
			}
			// build preview container and append preview display
			$('<div />')
				.addClass(kbcss.wrapper)
				.append(base.$preview)
				.prependTo(base.$keyboard);
		} else {
			base.$preview = base.$el;
			base.preview = base.el;
		}
	};

	// Added in v1.26.8 to allow chaining of the caret function, e.g.
	// keyboard.reveal().caret(4,5).insertText('test').caret('end');
	base.caret = function(param1, param2) {
		$keyboard.caret(base.$preview, param1, param2);
		return base;
	};

	base.saveCaret = function (start, end, $el) {
		if (base.isCurrent()) {
			var p = $keyboard.caret($el || base.$preview, start, end);
			base.last.start = typeof start === 'undefined' ? p.start : start;
			base.last.end = typeof end === 'undefined' ? p.end : end;
		}
	};

	base.setScroll = function () {
		// Set scroll so caret & current text is in view
		// needed for virtual keyboard typing, NOT manual typing - fixes #23
		if (base.last.virtual) {

			var scrollWidth, clientWidth, adjustment, direction,
				isTextarea = base.preview.nodeName === 'TEXTAREA',
				value = base.last.val.substring(0, Math.max(base.last.start, base.last.end));

			if (!base.$previewCopy) {
				// clone preview
				base.$previewCopy = base.$preview.clone()
					.removeAttr('id') // fixes #334
					.css({
						position: 'absolute',
						left: 0,
						zIndex: -10,
						visibility: 'hidden'
					})
					.addClass($keyboard.css.inputClone);
				// prevent submitting content on form submission
				base.$previewCopy[0].disabled = true;
				if (!isTextarea) {
					// make input zero-width because we need an accurate scrollWidth
					base.$previewCopy.css({
						'white-space': 'pre',
						'width': 0
					});
				}
				if (o.usePreview) {
					// add clone inside of preview wrapper
					base.$preview.after(base.$previewCopy);
				} else {
					// just slap that thing in there somewhere
					base.$keyboard.prepend(base.$previewCopy);
				}
			}

			if (isTextarea) {
				// need the textarea scrollHeight, so set the clone textarea height to be the line height
				base.$previewCopy
					.height(base.lineHeight)
					.val(value);
				// set scrollTop for Textarea
				base.preview.scrollTop = base.lineHeight *
					(Math.floor(base.$previewCopy[0].scrollHeight / base.lineHeight) - 1);
			} else {
				// add non-breaking spaces
				base.$previewCopy.val(value.replace(/\s/g, '\xa0'));

				// if scrollAdjustment option is set to "c" or "center" then center the caret
				adjustment = /c/i.test(o.scrollAdjustment) ? base.preview.clientWidth / 2 : o.scrollAdjustment;
				scrollWidth = base.$previewCopy[0].scrollWidth - 1;

				// set initial state as moving right
				if (typeof base.last.scrollWidth === 'undefined') {
					base.last.scrollWidth = scrollWidth;
					base.last.direction = true;
				}
				// if direction = true; we're scrolling to the right
				direction = base.last.scrollWidth === scrollWidth ?
					base.last.direction :
					base.last.scrollWidth < scrollWidth;
				clientWidth = base.preview.clientWidth - adjustment;

				// set scrollLeft for inputs; try to mimic the inherit caret positioning + scrolling:
				// hug right while scrolling right...
				if (direction) {
					if (scrollWidth < clientWidth) {
						base.preview.scrollLeft = 0;
					} else {
						base.preview.scrollLeft = scrollWidth - clientWidth;
					}
				} else {
					// hug left while scrolling left...
					if (scrollWidth >= base.preview.scrollWidth - clientWidth) {
						base.preview.scrollLeft = base.preview.scrollWidth - adjustment;
					} else if (scrollWidth - adjustment > 0) {
						base.preview.scrollLeft = scrollWidth - adjustment;
					} else {
						base.preview.scrollLeft = 0;
					}
				}

				base.last.scrollWidth = scrollWidth;
				base.last.direction = direction;
			}
		}
	};

	base.bindFocus = function () {
		if (o.openOn) {
			// make sure keyboard isn't destroyed
			// Check if base exists, this is a case when destroy is called, before timers have fired
			if (base && base.el.active) {
				base.$el.bind(o.openOn + base.namespace, function () {
					base.focusOn();
				});
				// remove focus from element (needed for IE since blur doesn't seem to work)
				if ($(':focus')[0] === base.el) {
					base.$el.blur();
				}
			}
		}
	};

	base.bindKeyboard = function () {
		var evt,
			keyCodes = $keyboard.keyCodes,
			layout = $keyboard.builtLayouts[base.layout];
		base.$preview
			.unbind(base.namespace)
			.bind('click' + base.namespace + ' touchstart' + base.namespace, function () {
				if (o.alwaysOpen && !base.isCurrent()) {
					base.reveal();
				}
				// update last caret position after user click, use at least 150ms or it doesn't work in IE
				base.timer2 = setTimeout(function () {
					if (base){
						base.saveCaret();
					}
				}, 150);

			})
			.bind('keypress' + base.namespace, function (e) {
				if (o.lockInput) {
					return false;
				}
				if (!base.isCurrent()) {
					return;
				}

				var k = e.charCode || e.which,
					// capsLock can only be checked while typing a-z
					k1 = k >= keyCodes.A && k <= keyCodes.Z,
					k2 = k >= keyCodes.a && k <= keyCodes.z,
					str = base.last.key = String.fromCharCode(k);
				base.last.virtual = false;
				base.last.event = e;
				base.last.$key = []; // not a virtual keyboard key
				if (base.checkCaret) {
					base.saveCaret();
				}

				// update capsLock
				if (k !== keyCodes.capsLock && (k1 || k2)) {
					base.capsLock = (k1 && !e.shiftKey) || (k2 && e.shiftKey);
					// if shifted keyset not visible, then show it
					if (base.capsLock && !base.shiftActive) {
						base.shiftActive = true;
						base.showSet();
					}
				}

				// restrict input - keyCode in keypress special keys:
				// see http://www.asquare.net/javascript/tests/KeyCode.html
				if (o.restrictInput) {
					// allow navigation keys to work - Chrome doesn't fire a keypress event (8 = bksp)
					if ((e.which === keyCodes.backSpace || e.which === 0) &&
						$.inArray(e.keyCode, base.alwaysAllowed)) {
						return;
					}
					// quick key check
					if ($.inArray(str, layout.acceptedKeys) === -1) {
						e.preventDefault();
						// copy event object in case e.preventDefault() breaks when changing the type
						evt = $.extend({}, e);
						evt.type = $keyboard.events.inputRestricted;
						base.$el.trigger(evt, [base, base.el]);
					}
				} else if ((e.ctrlKey || e.metaKey) &&
					(e.which === keyCodes.A || e.which === keyCodes.C || e.which === keyCodes.V ||
						(e.which >= keyCodes.X && e.which <= keyCodes.Z))) {
					// Allow select all (ctrl-a), copy (ctrl-c), paste (ctrl-v) & cut (ctrl-x) &
					// redo (ctrl-y)& undo (ctrl-z); meta key for mac
					return;
				}
				// Mapped Keys - allows typing on a regular keyboard and the mapped key is entered
				// Set up a key in the layout as follows: 'm(a):label'; m = key to map, (a) = actual keyboard key
				// to map to (optional), ':label' = title/tooltip (optional)
				// example: \u0391 or \u0391(A) or \u0391:alpha or \u0391(A):alpha
				if (layout.hasMappedKeys && layout.mappedKeys.hasOwnProperty(str)) {
					base.last.key = layout.mappedKeys[str];
					base.insertText(base.last.key);
					e.preventDefault();
				}
				if (typeof o.beforeInsert === 'function') {
					base.insertText(base.last.key);
					e.preventDefault();
				}
				base.checkMaxLength();

			})
			.bind('keyup' + base.namespace, function (e) {
				if (!base.isCurrent()) { return; }
				base.last.virtual = false;
				switch (e.which) {
					// Insert tab key
				case keyCodes.tab:
					// Added a flag to prevent from tabbing into an input, keyboard opening, then adding the tab
					// to the keyboard preview area on keyup. Sadly it still happens if you don't release the tab
					// key immediately because keydown event auto-repeats
					if (base.tab && o.tabNavigation && !o.lockInput) {
						base.shiftActive = e.shiftKey;
						// when switching inputs, the tab keyaction returns false
						var notSwitching = $keyboard.keyaction.tab(base);
						base.tab = false;
						if (!notSwitching) {
							return false;
						}
					} else {
						e.preventDefault();
					}
					break;

					// Escape will hide the keyboard
				case keyCodes.escape:
					if (!o.ignoreEsc) {
						base.close(o.autoAccept && o.autoAcceptOnEsc ? 'true' : false);
					}
					return false;
				}

				// throttle the check combo function because fast typers will have an incorrectly positioned caret
				clearTimeout(base.throttled);
				base.throttled = setTimeout(function () {
					// fix error in OSX? see issue #102
					if (base && base.isVisible()) {
						base.checkCombos();
					}
				}, 100);

				base.checkMaxLength();

				base.last.preVal = '' + base.last.val;
				base.last.val = base.$preview.val();

				// don't alter "e" or the "keyup" event never finishes processing; fixes #552
				var event = jQuery.Event( $keyboard.events.kbChange );
				// base.last.key may be empty string (shift, enter, tab, etc) when keyboard is first visible
				// use e.key instead, if browser supports it
				event.action = base.last.key;
				base.$el.trigger(event, [base, base.el]);

				// change callback is no longer bound to the input element as the callback could be
				// called during an external change event with all the necessary parameters (issue #157)
				if ($.isFunction(o.change)) {
					event.type = $keyboard.events.inputChange;
					o.change(event, base, base.el);
					return false;
				}
				if (o.acceptValid && o.autoAcceptOnValid) {
					if ($.isFunction(o.validate) && o.validate(base, base.$preview.val())) {
						base.$preview.blur();
						base.accept();
					}
				}
			})
			.bind('keydown' + base.namespace, function (e) {
				base.last.keyPress = e.which;
				// ensure alwaysOpen keyboards are made active
				if (o.alwaysOpen && !base.isCurrent()) {
					base.reveal();
				}
				// prevent tab key from leaving the preview window
				if (e.which === keyCodes.tab) {
					// allow tab to pass through - tab to next input/shift-tab for prev
					base.tab = true;
					return false;
				}

				if (o.lockInput) {
					return false;
				}

				base.last.virtual = false;
				switch (e.which) {

				case keyCodes.backSpace:
					$keyboard.keyaction.bksp(base, null, e);
					e.preventDefault();
					break;

				case keyCodes.enter:
					$keyboard.keyaction.enter(base, null, e);
					break;

					// Show capsLock
				case keyCodes.capsLock:
					base.shiftActive = base.capsLock = !base.capsLock;
					base.showSet();
					break;

				case keyCodes.V:
					// prevent ctrl-v/cmd-v
					if (e.ctrlKey || e.metaKey) {
						if (o.preventPaste) {
							e.preventDefault();
							return;
						}
						base.checkCombos(); // check pasted content
					}
					break;
				}
			})
			.bind('mouseup touchend '.split(' ').join(base.namespace + ' '), function () {
				base.last.virtual = true;
				base.saveCaret();
			});

		// prevent keyboard event bubbling
		base.$keyboard.bind('mousedown click touchstart '.split(' ').join(base.namespace + ' '), function (e) {
			e.stopPropagation();
			if (!base.isCurrent()) {
				base.reveal();
				$(document).trigger('checkkeyboard' + base.namespace);
			}
			if (!o.noFocus && base.$preview) {
				base.$preview.focus();
			}
		});

		// If preventing paste, block context menu (right click)
		if (o.preventPaste) {
			base.$preview.bind('contextmenu' + base.namespace, function (e) {
				e.preventDefault();
			});
			base.$el.bind('contextmenu' + base.namespace, function (e) {
				e.preventDefault();
			});
		}

	};

	base.bindKeys = function () {
		var kbcss = $keyboard.css;
		base.$allKeys = base.$keyboard.find('button.' + kbcss.keyButton)
			.unbind(base.namespace + ' ' + base.namespace + 'kb')
			// Change hover class and tooltip - moved this touchstart before option.keyBinding touchstart
			// to prevent mousewheel lag/duplication - Fixes #379 & #411
			.bind('mouseenter mouseleave touchstart '.split(' ').join(base.namespace + ' '), function (e) {
				if ((o.alwaysOpen || o.userClosed) && e.type !== 'mouseleave' && !base.isCurrent()) {
					base.reveal();
					if (!o.noFocus) {
						base.$preview.focus();
					}
					$keyboard.caret(base.$preview, base.last);
				}
				if (!base.isCurrent()) {
					return;
				}
				var $keys, txt,
					last = base.last,
					$this = $(this),
					type = e.type;

				if (o.useWheel && base.wheel) {
					$keys = base.getLayers($this);
					txt = ($keys.length ? $keys.map(function () {
							return $(this).attr('data-value') || '';
						})
						.get() : '') || [$this.text()];
					last.wheel_$Keys = $keys;
					last.wheelLayers = txt;
					last.wheelIndex = $.inArray($this.attr('data-value'), txt);
				}

				if ((type === 'mouseenter' || type === 'touchstart') && base.el.type !== 'password' &&
					!$this.hasClass(o.css.buttonDisabled)) {
					$this.addClass(o.css.buttonHover);
					if (o.useWheel && base.wheel) {
						$this.attr('title', function (i, t) {
							// show mouse wheel message
							return (base.wheel && t === '' && base.sets && txt.length > 1 && type !== 'touchstart') ?
								o.wheelMessage : t;
						});
					}
				}
				if (type === 'mouseleave') {
					// needed or IE flickers really bad
					$this.removeClass((base.el.type === 'password') ? '' : o.css.buttonHover);
					if (o.useWheel && base.wheel) {
						last.wheelIndex = 0;
						last.wheelLayers = [];
						last.wheel_$Keys = null;
						$this
							.attr('title', function (i, t) {
								return (t === o.wheelMessage) ? '' : t;
							})
							.html($this.attr('data-html')); // restore original button text
					}
				}
			})
			// keyBinding = 'mousedown touchstart' by default
			.bind(o.keyBinding.split(' ').join(base.namespace + ' ') + base.namespace + ' ' +
				$keyboard.events.kbRepeater, function (e) {
				e.preventDefault();
				// prevent errors when external triggers attempt to 'type' - see issue #158
				if (!base.$keyboard.is(':visible')) {
					return false;
				}
				var action, $keys,
					last = base.last,
					key = this,
					$key = $(key),
					// prevent mousedown & touchstart from both firing events at the same time - see #184
					timer = new Date().getTime();

				if (o.useWheel && base.wheel) {
					// get keys from other layers/keysets (shift, alt, meta, etc) that line up by data-position
					$keys = last.wheel_$Keys;
					// target mousewheel selected key
					$key = $keys && last.wheelIndex > -1 ? $keys.eq(last.wheelIndex) : $key;
				}
				action = $key.attr('data-action');
				if (timer - (last.eventTime || 0) < o.preventDoubleEventTime) {
					return;
				}
				last.eventTime = timer;
				last.event = e;
				last.virtual = true;
				if (!o.noFocus) {
					base.$preview.focus();
				}
				last.$key = $key;
				last.key = $key.attr('data-value');
				last.keyPress = "";
				// Start caret in IE when not focused (happens with each virtual keyboard button click
				if (base.checkCaret) {
					$keyboard.caret(base.$preview, last);
				}
				if (/^meta/.test(action)) {
					action = 'meta';
				}
				// keyaction is added as a string, override original action & text
				if (action === last.key && typeof $keyboard.keyaction[action] === 'string') {
					last.key = action = $keyboard.keyaction[action];
				} else if (action in $keyboard.keyaction && $.isFunction($keyboard.keyaction[action])) {
					// stop processing if action returns false (close & cancel)
					if ($keyboard.keyaction[action](base, this, e) === false) {
						return false;
					}
					action = null; // prevent inserting action name
				}
				// stop processing if keyboard closed and keyaction did not return false - see #536
				if (!base.hasKeyboard()) {
					return false;
				}
				if (typeof action !== 'undefined' && action !== null) {
					last.key = $(this).hasClass(kbcss.keyAction) ? action : last.key;
					base.insertText(last.key);
					if (!base.capsLock && !o.stickyShift && !e.shiftKey) {
						base.shiftActive = false;
						base.showSet($key.attr('data-name'));
					}
				}
				// set caret if caret moved by action function; also, attempt to fix issue #131
				$keyboard.caret(base.$preview, last);
				base.checkCombos();
				e.type = $keyboard.events.kbChange;
				e.action = last.key;
				base.$el.trigger(e, [base, base.el]);
				last.preVal = '' + last.val;
				last.val = base.$preview.val();

				if ($.isFunction(o.change)) {
					e.type = $keyboard.events.inputChange;
					o.change(e, base, base.el);
					// return false to prevent reopening keyboard if base.accept() was called
					return false;
				}

			})
			// using 'kb' namespace for mouse repeat functionality to keep it separate
			// I need to trigger a 'repeater.keyboard' to make it work
			.bind('mouseup' + base.namespace + ' ' + 'mouseleave touchend touchmove touchcancel '.split(' ')
				.join(base.namespace + 'kb '), function (e) {
				base.last.virtual = true;
				var offset,
					$this = $(this);
				if (e.type === 'touchmove') {
					// if moving within the same key, don't stop repeating
					offset = $this.offset();
					offset.right = offset.left + $this.outerWidth();
					offset.bottom = offset.top + $this.outerHeight();
					if (e.originalEvent.touches[0].pageX >= offset.left &&
						e.originalEvent.touches[0].pageX < offset.right &&
						e.originalEvent.touches[0].pageY >= offset.top &&
						e.originalEvent.touches[0].pageY < offset.bottom) {
						return true;
					}
				} else if (/(mouseleave|touchend|touchcancel)/i.test(e.type)) {
					$this.removeClass(o.css.buttonHover); // needed for touch devices
				} else {
					if (!o.noFocus && base.isCurrent() && base.isVisible()) {
						base.$preview.focus();
					}
					if (base.checkCaret) {
						$keyboard.caret(base.$preview, base.last);
					}
				}
				base.mouseRepeat = [false, ''];
				clearTimeout(base.repeater); // make sure key repeat stops!
				if (o.acceptValid && o.autoAcceptOnValid) {
					if ($.isFunction(o.validate) && o.validate(base, base.$preview.val())) {
						base.$preview.blur();
						base.accept();
					}
				}
				return false;
			})
			// prevent form submits when keyboard is bound locally - issue #64
			.bind('click' + base.namespace, function () {
				return false;
			})
			// no mouse repeat for action keys (shift, ctrl, alt, meta, etc)
			.not('.' + kbcss.keyAction)
			// Allow mousewheel to scroll through other keysets of the same (non-action) key
			.bind('mousewheel' + base.namespace, function (e, delta) {
				if (o.useWheel && base.wheel) {
					// deltaY used by newer versions of mousewheel plugin
					delta = delta || e.deltaY;
					var n,
						txt = base.last.wheelLayers || [];
					if (txt.length > 1) {
						n = base.last.wheelIndex + (delta > 0 ? -1 : 1);
						if (n > txt.length - 1) {
							n = 0;
						}
						if (n < 0) {
							n = txt.length - 1;
						}
					} else {
						n = 0;
					}
					base.last.wheelIndex = n;
					$(this).html(txt[n]);
					return false;
				}
			})
			// mouse repeated action key exceptions
			.add('.' + kbcss.keyPrefix + ('tab bksp space enter'.split(' ')
				.join(',.' + kbcss.keyPrefix)), base.$keyboard)
			.bind('mousedown touchstart '.split(' ').join(base.namespace + 'kb '), function () {
				if (o.repeatRate !== 0) {
					var key = $(this);
					// save the key, make sure we are repeating the right one (fast typers)
					base.mouseRepeat = [true, key];
					setTimeout(function () {
						// don't repeat keys if it is disabled - see #431
						if (base && base.mouseRepeat[0] && base.mouseRepeat[1] === key && !key[0].disabled) {
							base.repeatKey(key);
						}
					}, o.repeatDelay);
				}
				return false;
			});
	};

	// Insert text at caret/selection - thanks to Derek Wickwire for fixing this up!
	base.insertText = function (txt) {
		if (!base.$preview) { return; }
		if (typeof o.beforeInsert === 'function') {
			txt = o.beforeInsert(base.last.event, base, base.el, txt);
		}
		if (typeof txt === 'undefined' || txt === false) {
			base.last.key = '';
			return;
		}
		var bksp, t,
			isBksp = txt === '\b',
			// use base.$preview.val() instead of base.preview.value (val.length includes carriage returns in IE).
			val = base.$preview.val(),
			pos = $keyboard.caret(base.$preview),
			len = val.length; // save original content length

		// silly IE caret hacks... it should work correctly, but navigating using arrow keys in a textarea
		// is still difficult
		// in IE, pos.end can be zero after input loses focus
		if (pos.end < pos.start) {
			pos.end = pos.start;
		}
		if (pos.start > len) {
			pos.end = pos.start = len;
		}

		if (base.preview.nodeName === 'TEXTAREA') {
			// This makes sure the caret moves to the next line after clicking on enter (manual typing works fine)
			if ($keyboard.msie && val.substr(pos.start, 1) === '\n') {
				pos.start += 1;
				pos.end += 1;
			}
		}

		if (txt === '{d}') {
			txt = '';
			t = pos.start;
			pos.end += 1;
		}

		bksp = isBksp && pos.start === pos.end;
		txt = isBksp ? '' : txt;
		val = val.substr(0, pos.start - (bksp ? 1 : 0)) + txt + val.substr(pos.end);
		t = pos.start + (bksp ? -1 : txt.length);

		base.$preview.val(val);
		base.saveCaret(t, t); // save caret in case of bksp
		base.setScroll();
		// see #506.. allow chaining of insertText
		return base;
	};

	// check max length
	base.checkMaxLength = function () {
		if (!base.$preview) { return; }
		var start, caret,
			val = base.$preview.val();
		if (o.maxLength !== false && val.length > o.maxLength) {
			start = $keyboard.caret(base.$preview).start;
			caret = Math.min(start, o.maxLength);

			// prevent inserting new characters when maxed #289
			if (!o.maxInsert) {
				val = base.last.val;
				caret = start - 1; // move caret back one
			}

			base.$preview.val(val.substring(0, o.maxLength));
			// restore caret on change, otherwise it ends up at the end.
			base.saveCaret(caret, caret);
		}
		if (base.$decBtn.length) {
			base.checkDecimal();
		}
		// allow chaining
		return base;
	};

	// mousedown repeater
	base.repeatKey = function (key) {
		key.trigger($keyboard.events.kbRepeater);
		if (base.mouseRepeat[0]) {
			base.repeater = setTimeout(function () {
				if (base){
					base.repeatKey(key);
				}
			}, base.repeatTime);
		}
	};

	base.getKeySet = function () {
		var sets = [];
		if (base.altActive) {
			sets.push('alt');
		}
		if (base.shiftActive) {
			sets.push('shift');
		}
		if (base.metaActive) {
			// base.metaActive contains the string name of the
			// current meta keyset
			sets.push(base.metaActive);
		}
		return sets.length ? sets.join('+') : 'normal';
	};

	// make it easier to switch keysets via API
	// showKeySet('shift+alt+meta1')
	base.showKeySet = function (str) {
		if (typeof str === 'string') {
			base.last.keyset = [base.shiftActive, base.altActive, base.metaActive];
			base.shiftActive = /shift/i.test(str);
			base.altActive = /alt/i.test(str);
			if (/\bmeta/.test(str)) {
				base.metaActive = true;
				base.showSet(str.match(/\bmeta[\w-]+/i)[0]);
			} else {
				base.metaActive = false;
				base.showSet();
			}
		} else {
			base.showSet(str);
		}
		// allow chaining
		return base;
	};

	base.showSet = function (name) {
		if (!base.hasKeyboard()) { return; }
		o = base.options; // refresh options
		var kbcss = $keyboard.css,
			prefix = '.' + kbcss.keyPrefix,
			active = o.css.buttonActive,
			key = '',
			toShow = (base.shiftActive ? 1 : 0) + (base.altActive ? 2 : 0);
		if (!base.shiftActive) {
			base.capsLock = false;
		}
		// check meta key set
		if (base.metaActive) {
			// remove "-shift" and "-alt" from meta name if it exists
			if (base.shiftActive) {
				name = (name || "").replace("-shift", "");
			}
			if (base.altActive) {
				name = (name || "").replace("-alt", "");
			}
			// the name attribute contains the meta set name 'meta99'
			key = (/^meta/i.test(name)) ? name : '';
			// save active meta keyset name
			if (key === '') {
				key = (base.metaActive === true) ? '' : base.metaActive;
			} else {
				base.metaActive = key;
			}
			// if meta keyset doesn't have a shift or alt keyset, then show just the meta key set
			if ((!o.stickyShift && base.last.keyset[2] !== base.metaActive) ||
				((base.shiftActive || base.altActive) &&
				!base.$keyboard.find('.' + kbcss.keySet + '-' + key + base.rows[toShow]).length)) {
				base.shiftActive = base.altActive = false;
			}
		} else if (!o.stickyShift && base.last.keyset[2] !== base.metaActive && base.shiftActive) {
			// switching from meta key set back to default, reset shift & alt if using stickyShift
			base.shiftActive = base.altActive = false;
		}
		toShow = (base.shiftActive ? 1 : 0) + (base.altActive ? 2 : 0);
		key = (toShow === 0 && !base.metaActive) ? '-normal' : (key === '') ? '' : '-' + key;
		if (!base.$keyboard.find('.' + kbcss.keySet + key + base.rows[toShow]).length) {
			// keyset doesn't exist, so restore last keyset settings
			base.shiftActive = base.last.keyset[0];
			base.altActive = base.last.keyset[1];
			base.metaActive = base.last.keyset[2];
			return;
		}
		base.$keyboard
			.find(prefix + 'alt,' + prefix + 'shift,.' + kbcss.keyAction + '[class*=meta]')
			.removeClass(active)
			.end()
			.find(prefix + 'alt')
			.toggleClass(active, base.altActive)
			.end()
			.find(prefix + 'shift')
			.toggleClass(active, base.shiftActive)
			.end()
			.find(prefix + 'lock')
			.toggleClass(active, base.capsLock)
			.end()
			.find('.' + kbcss.keySet)
			.hide()
			.end()
			.find('.' + (kbcss.keyAction + prefix + key).replace("--", "-"))
			.addClass(active);

		// show keyset using inline-block ( extender layout will then line up )
		base.$keyboard.find('.' + kbcss.keySet + key + base.rows[toShow])[0].style.display = 'inline-block';
		if (base.metaActive) {
			base.$keyboard.find(prefix + base.metaActive)
				// base.metaActive contains the string "meta#" or false
				// without the !== false, jQuery UI tries to transition the classes
				.toggleClass(active, base.metaActive !== false);
		}
		base.last.keyset = [base.shiftActive, base.altActive, base.metaActive];
		base.$el.trigger($keyboard.events.kbKeysetChange, [base, base.el]);
		if (o.reposition) {
			base.reposition();
		}
	};

	// check for key combos (dead keys)
	base.checkCombos = function () {
		// return val for close function
		if ( !(
			base.isVisible() || (
				base.hasKeyboard() &&
				base.$keyboard.hasClass( $keyboard.css.hasFocus )
			)
		) ) {
			return ( base.$preview || base.$el ).val();
		}
		var r, t, t2,
			// use base.$preview.val() instead of base.preview.value (val.length includes carriage returns in IE).
			val = base.$preview.val(),
			pos = $keyboard.caret(base.$preview),
			layout = $keyboard.builtLayouts[base.layout],
			len = val.length; // save original content length
		// return if val is empty; fixes #352
		if (val === '') {
			// check valid on empty string - see #429
			if (o.acceptValid) {
				base.checkValid();
			}
			return val;
		}

		// silly IE caret hacks... it should work correctly, but navigating using arrow keys in a textarea
		// is still difficult
		// in IE, pos.end can be zero after input loses focus
		if (pos.end < pos.start) {
			pos.end = pos.start;
		}
		if (pos.start > len) {
			pos.end = pos.start = len;
		}
		// This makes sure the caret moves to the next line after clicking on enter (manual typing works fine)
		if ($keyboard.msie && val.substr(pos.start, 1) === '\n') {
			pos.start += 1;
			pos.end += 1;
		}

		if (o.useCombos) {
			// keep 'a' and 'o' in the regex for ae and oe ligature (æ,œ)
			// thanks to KennyTM: http://stackoverflow.com/q/4275077
			// original regex /([`\'~\^\"ao])([a-z])/mig moved to $.keyboard.comboRegex
			if ($keyboard.msie) {
				// old IE may not have the caret positioned correctly, so just check the whole thing
				val = val.replace(base.regex, function (s, accent, letter) {
					return (o.combos.hasOwnProperty(accent)) ? o.combos[accent][letter] || s : s;
				});
				// prevent combo replace error, in case the keyboard closes - see issue #116
			} else if (base.$preview.length) {
				// Modern browsers - check for combos from last two characters left of the caret
				t = pos.start - (pos.start - 2 >= 0 ? 2 : 0);
				// target last two characters
				$keyboard.caret(base.$preview, t, pos.end);
				// do combo replace
				t2 = ($keyboard.caret(base.$preview).text || '').replace(base.regex, function (s, accent, letter) {
					return (o.combos.hasOwnProperty(accent)) ? o.combos[accent][letter] || s : s;
				});
				// add combo back
				t = $keyboard.caret(base.$preview);
				// prevent error if caret doesn't return a function
				if (t && t.replaceStr) {
					base.$preview.val(t.replaceStr(t2));
				}
				val = base.$preview.val();
			}
		}

		// check input restrictions - in case content was pasted
		if (o.restrictInput && val !== '') {
			t = layout.acceptedKeys.length;

			r = layout.acceptedKeysRegex;
			if (!r) {
				t2 = $.map(layout.acceptedKeys, function (v) {
					// escape any special characters
					return v.replace(base.escapeRegex, '\\$&');
				});
				r = layout.acceptedKeysRegex = new RegExp('(' + t2.join('|') + ')', 'g');
			}

			// only save matching keys
			t2 = val.match(r);
			if (t2) {
				val = t2.join('');
			} else {
				// no valid characters
				val = '';
				len = 0;
			}
		}

		// save changes, then reposition caret
		pos.start += val.length - len;
		pos.end += val.length - len;
		base.$preview.val(val);
		base.saveCaret(pos.start, pos.end);
		// set scroll to keep caret in view
		base.setScroll();

		base.checkMaxLength();

		if (o.acceptValid) {
			base.checkValid();
		}

		return val; // return text, used for keyboard closing section
	};

	// Toggle accept button classes, if validating
	base.checkValid = function () {
		var kbcss = $keyboard.css,
			$accept = base.$keyboard.find('.' + kbcss.keyPrefix + 'accept'),
			valid = true;
		if ($.isFunction(o.validate)) {
			valid = o.validate(base, base.$preview.val(), false);
		}
		// toggle accept button classes; defined in the css
		$accept
			.toggleClass(kbcss.inputInvalid, !valid)
			.toggleClass(kbcss.inputValid, valid)
			// update title to indicate that the entry is valid or invalid
			.attr('title', $accept.attr('data-title') + ' (' + o.display[valid ? 'valid' : 'invalid'] + ')');
	};

	// Decimal button for num pad - only allow one (not used by default)
	base.checkDecimal = function () {
		// Check US '.' or European ',' format
		if ((base.decimal && /\./g.test(base.preview.value)) ||
			(!base.decimal && /\,/g.test(base.preview.value))) {
			base.$decBtn
				.attr({
					'disabled': 'disabled',
					'aria-disabled': 'true'
				})
				.removeClass(o.css.buttonHover)
				.addClass(o.css.buttonDisabled);
		} else {
			base.$decBtn
				.removeAttr('disabled')
				.attr({
					'aria-disabled': 'false'
				})
				.addClass(o.css.buttonDefault)
				.removeClass(o.css.buttonDisabled);
		}
	};

	// get other layer values for a specific key
	base.getLayers = function ($el) {
		var kbcss = $keyboard.css,
			key = $el.attr('data-pos'),
			$keys = $el.closest('.' + kbcss.keyboard)
			.find('button[data-pos="' + key + '"]');
		return $keys.filter(function () {
			return $(this)
				.find('.' + kbcss.keyText)
				.text() !== '';
		})
		.add($el);
	};

	// Go to next or prev inputs
	// goToNext = true, then go to next input; if false go to prev
	// isAccepted is from autoAccept option or true if user presses shift+enter
	base.switchInput = function (goToNext, isAccepted) {
		if ($.isFunction(o.switchInput)) {
			o.switchInput(base, goToNext, isAccepted);
		} else {
			// base.$keyboard may be an empty array - see #275 (apod42)
			if (base.$keyboard.length) {
				base.$keyboard.hide();
			}
			var kb,
				stopped = false,
				all = $('button, input, select, textarea, a')
					.filter(':visible')
					.not(':disabled'),
				indx = all.index(base.$el) + (goToNext ? 1 : -1);
			if (base.$keyboard.length) {
				base.$keyboard.show();
			}
			if (indx > all.length - 1) {
				stopped = o.stopAtEnd;
				indx = 0; // go to first input
			}
			if (indx < 0) {
				stopped = o.stopAtEnd;
				indx = all.length - 1; // stop or go to last
			}
			if (!stopped) {
				isAccepted = base.close(isAccepted);
				if (!isAccepted) {
					return;
				}
				kb = all.eq(indx).data('keyboard');
				if (kb && kb.options.openOn.length) {
					kb.focusOn();
				} else {
					all.eq(indx).focus();
				}
			}
		}
		return false;
	};

	// Close the keyboard, if visible. Pass a status of true, if the content was accepted
	// (for the event trigger).
	base.close = function (accepted) {
		if (base.isOpen && base.$keyboard.length) {
			clearTimeout(base.throttled);
			var kbcss = $keyboard.css,
				kbevents = $keyboard.events,
				val = (accepted) ? base.checkCombos() : base.originalContent;
			// validate input if accepted
			if (accepted && $.isFunction(o.validate) && !o.validate(base, val, true)) {
				val = base.originalContent;
				accepted = false;
				if (o.cancelClose) {
					return;
				}
			}
			base.isCurrent(false);
			base.isOpen = o.alwaysOpen || o.userClosed;
			// update value for always open keyboards
			base.$preview.val(val);
			base.$el
				.removeClass(kbcss.isCurrent + ' ' + kbcss.inputAutoAccepted)
				// add 'ui-keyboard-autoaccepted' to inputs - see issue #66
				.addClass((accepted || false) ? accepted === true ? '' : kbcss.inputAutoAccepted : '')
				.val(val)
				// trigger default change event - see issue #146
				.trigger(kbevents.inputChange);
			// don't trigger an empty event - see issue #463
			if (!o.alwaysOpen) {
				// don't trigger beforeClose if keyboard is always open
				base.$el.trigger(kbevents.kbBeforeClose, [base, base.el, (accepted || false)]);
			}
			// save caret after updating value (fixes userClosed issue with changing focus)
			$keyboard.caret(base.$preview, base.last);

			base.$el
				.trigger(((accepted || false) ? kbevents.inputAccepted : kbevents.inputCanceled), [base, base.el])
				.trigger((o.alwaysOpen) ? kbevents.kbInactive : kbevents.kbHidden, [base, base.el])
				.blur();

			// base is undefined if keyboard was destroyed - fixes #358
			if (base) {
				// add close event time
				base.last.eventTime = new Date().getTime();
				if (!(o.alwaysOpen || o.userClosed && accepted === 'true') && base.$keyboard.length) {
					// free up memory
					base.removeKeyboard();
					// rebind input focus - delayed to fix IE issue #72
					base.timer = setTimeout(function () {
						if (base) {
							base.bindFocus();
						}
					}, 500);
				}
				if (!base.watermark && base.el.value === '' && base.inPlaceholder !== '') {
					base.$el
						.addClass(kbcss.placeholder)
						.val(base.inPlaceholder);
				}
			}
		}
		return !!accepted;
	};

	base.accept = function () {
		return base.close(true);
	};

	base.checkClose = function (e) {
		if (base.opening) {
			return;
		}
		base.escClose(e);
		var kbcss = $.keyboard.css,
			$target = $(e.target);
		// needed for IE to allow switching between keyboards smoothly
		if ($target.hasClass(kbcss.input)) {
			var kb = $target.data('keyboard');
			// only trigger on self
			if (
				kb !== base &&
				!kb.$el.hasClass(kbcss.isCurrent) &&
				kb.options.openOn &&
				e.type === o.openOn
			) {
				kb.focusOn();
			}
		}
	};

	base.escClose = function (e) {
		if (e && e.type === 'keyup') {
			return (e.which === $keyboard.keyCodes.escape && !o.ignoreEsc) ?
				base.close(o.autoAccept && o.autoAcceptOnEsc ? 'true' : false) :
				'';
		}
		// keep keyboard open if alwaysOpen or stayOpen is true - fixes mutliple always open keyboards or
		// single stay open keyboard
		if (!base.isOpen) {
			return;
		}
		// ignore autoaccept if using escape - good idea?
		if (!base.isCurrent() && base.isOpen || base.isOpen && e.target !== base.el) {
			// don't close if stayOpen is set; but close if a different keyboard is being opened
			if ((o.stayOpen || o.userClosed) && !$(e.target).hasClass($keyboard.css.input)) {
				return;
			}
			// stop propogation in IE - an input getting focus doesn't open a keyboard if one is already open
			if ($keyboard.allie) {
				e.preventDefault();
			}
			if (o.closeByClickEvent) {
				// only close the keyboard if the user is clicking on an input or if he causes a click
				// event (touchstart/mousedown will not force the close with this setting)
				var name = e.target.nodeName.toLowerCase();
				if (name === 'input' || name === 'textarea' || e.type === 'click') {
					base.close(o.autoAccept ? 'true' : false);
				}
			} else {
				// send 'true' instead of a true (boolean), the input won't get a 'ui-keyboard-autoaccepted'
				// class name - see issue #66
				base.close(o.autoAccept ? 'true' : false);
			}
		}
	};

	// Build default button
	base.keyBtn = $('<button />')
		.attr({
			'role': 'button',
			'type': 'button',
			'aria-disabled': 'false',
			'tabindex': '-1'
		})
		.addClass($keyboard.css.keyButton);

	// convert key names into a class name
	base.processName = function (name) {
		var index, n,
			process = (name || '').replace(/[^a-z0-9-_]/gi, ''),
			len = process.length,
			newName = [];
		if (len > 1 && name === process) {
			// return name if basic text
			return name;
		}
		// return character code sequence
		len = name.length;
		if (len) {
			for (index = 0; index < len; index++) {
				n = name[index];
				// keep '-' and '_'... so for dash, we get two dashes in a row
				newName.push(/[a-z0-9-_]/i.test(n) ?
					(/[-_]/.test(n) && index !== 0 ? '' : n) :
					(index === 0 ? '' : '-') + n.charCodeAt(0)
				);
			}
			return newName.join('');
		} else {
			return name;
		}
	};

	base.processKeys = function (name) {
		var tmp,
			parts = name.split(':'),
			data = {
				name: null,
				map: '',
				title: ''
			};
		/* map defined keys
		format 'key(A):Label_for_key_(ignore_parentheses_here)'
			'key' = key that is seen (can any character(s); but it might need to be escaped using '\'
			or entered as unicode '\u####'
			'(A)' = the actual key on the real keyboard to remap
			':Label_for_key' ends up in the title/tooltip
		Examples:
			'\u0391(A):alpha', 'x(y):this_(might)_cause_problems
			or edge cases of ':(x)', 'x(:)', 'x(()' or 'x())'
		Enhancement (if I can get alt keys to work):
			A mapped key will include the mod key, e.g. 'x(alt-x)' or 'x(alt-shift-x)'
		*/
		if (/\(.+\)/.test(parts[0]) || /^:\(.+\)/.test(name) || /\([(:)]\)/.test(name)) {
			// edge cases 'x(:)', 'x(()' or 'x())'
			if (/\([(:)]\)/.test(name)) {
				tmp = parts[0].match(/([^(]+)\((.+)\)/);
				if (tmp && tmp.length) {
					data.name = tmp[1];
					data.map = tmp[2];
					data.title = parts.length > 1 ? parts.slice(1).join(':') : '';
				} else {
					// edge cases 'x(:)', ':(x)' or ':(:)'
					data.name = name.match(/([^(]+)/)[0];
					if (data.name === ':') {
						// ':(:):test' => parts = [ '', '(', ')', 'title' ] need to slice 1
						parts = parts.slice(1);
					}
					if (tmp === null) {
						// 'x(:):test' => parts = [ 'x(', ')', 'title' ] need to slice 2
						data.map = ':';
						parts = parts.slice(2);
					}
					data.title = parts.length ? parts.join(':') : '';
				}
			} else {
				// example: \u0391(A):alpha; extract 'A' from '(A)'
				data.map = name.match(/\(([^()]+?)\)/)[1];
				// remove '(A)', left with '\u0391:alpha'
				name = name.replace(/\(([^()]+)\)/, '');
				tmp = name.split(':');
				// get '\u0391' from '\u0391:alpha'
				if (tmp[0] === '') {
					data.name = ':';
					parts = parts.slice(1);
				} else {
					data.name = tmp[0];
				}
				data.title = parts.length > 1 ? parts.slice(1).join(':') : '';
			}
		} else {
			// find key label
			// corner case of '::;' reduced to ':;', split as ['', ';']
			if (name !== '' && parts[0] === '') {
				data.name = ':';
				parts = parts.slice(1);
			} else {
				data.name = parts[0];
			}
			data.title = parts.length > 1 ? parts.slice(1).join(':') : '';
		}
		data.title = $.trim(data.title).replace(/_/g, ' ');
		return data;
	};

	// Add key function
	// keyName = the name of the function called in $.keyboard.keyaction when the button is clicked
	// name = name added to key, or cross-referenced in the display options
	// base.temp[0] = keyset to attach the new button
	// regKey = true when it is not an action key
	base.addKey = function (keyName, action, regKey) {
		var keyClass, tmp, keys,
			data = {},
			txt = base.processKeys(regKey ? keyName : action),
			kbcss = $keyboard.css;

		if (!regKey && o.display[txt.name]) {
			keys = base.processKeys(o.display[txt.name]);
			// action contained in "keyName" (e.g. keyName = "accept",
			// action = "a" (use checkmark instead of text))
			keys.action = base.processKeys(keyName).name;
		} else {
			// when regKey is true, keyName is the same as action
			keys = txt;
			keys.action = txt.name;
		}

		data.name = base.processName(txt.name);

		if (keys.map !== '') {
			$keyboard.builtLayouts[base.layout].mappedKeys[keys.map] = keys.name;
			$keyboard.builtLayouts[base.layout].acceptedKeys.push(keys.name);
		} else if (regKey) {
			$keyboard.builtLayouts[base.layout].acceptedKeys.push(keys.name);
		}

		if (regKey) {
			keyClass = data.name === '' ? '' : kbcss.keyPrefix + data.name;
		} else {
			// Action keys will have the 'ui-keyboard-actionkey' class
			keyClass = kbcss.keyAction + ' ' + kbcss.keyPrefix + keys.action;
		}
		// '\u2190'.length = 1 because the unicode is converted, so if more than one character,
		// add the wide class
		keyClass += (keys.name.length > 2 ? ' ' + kbcss.keyWide : '') + ' ' + o.css.buttonDefault;

		data.html = '<span class="' + kbcss.keyText + '">' +
			// this prevents HTML from being added to the key
			keys.name.replace(/[\u00A0-\u9999]/gim, function (i) {
				return '&#' + i.charCodeAt(0) + ';';
			}) +
			'</span>';

		data.$key = base.keyBtn
			.clone()
			.attr({
				'data-value': regKey ? keys.name : keys.action, // value
				'data-name': keys.action,
				'data-pos': base.temp[1] + ',' + base.temp[2],
				'data-action': keys.action,
				'data-html': data.html
			})
			// add 'ui-keyboard-' + data.name for all keys
			//  (e.g. 'Bksp' will have 'ui-keyboard-bskp' class)
			// any non-alphanumeric characters will be replaced with
			//  their decimal unicode value
			//  (e.g. '~' is a regular key, class = 'ui-keyboard-126'
			//  (126 is the unicode decimal value - same as &#126;)
			//  See https://en.wikipedia.org/wiki/List_of_Unicode_characters#Control_codes
			.addClass(keyClass)
			.html(data.html)
			.appendTo(base.temp[0]);

		if (keys.map) {
			data.$key.attr('data-mapped', keys.map);
		}
		if (keys.title || txt.title) {
			data.$key.attr({
				'data-title': txt.title || keys.title, // used to allow adding content to title
				'title': txt.title || keys.title
			});
		}

		if (typeof o.buildKey === 'function') {
			data = o.buildKey(base, data);
			// copy html back to attributes
			tmp = data.$key.html();
			data.$key.attr('data-html', tmp);
		}
		return data.$key;
	};

	base.customHash = function (layout) {
		/*jshint bitwise:false */
		var i, array, hash, character, len,
			arrays = [],
			merged = [];
		// pass layout to allow for testing
		layout = typeof layout === 'undefined' ? o.customLayout : layout;
		// get all layout arrays
		for (array in layout) {
			if (layout.hasOwnProperty(array)) {
				arrays.push(layout[array]);
			}
		}
		// flatten array
		merged = merged.concat.apply(merged, arrays).join(' ');
		// produce hash name - http://stackoverflow.com/a/7616484/145346
		hash = 0;
		len = merged.length;
		if (len === 0) {
			return hash;
		}
		for (i = 0; i < len; i++) {
			character = merged.charCodeAt(i);
			hash = ((hash << 5) - hash) + character;
			hash = hash & hash; // Convert to 32bit integer
		}
		return hash;
	};

	base.buildKeyboard = function (name, internal) {
		// o.display is empty when this is called from the scramble extension (when alwaysOpen:true)
		if ($.isEmptyObject(o.display)) {
			// set keyboard language
			base.updateLanguage();
		}
		var row, $row, currentSet,
			kbcss = $keyboard.css,
			sets = 0,
			layout = $keyboard.builtLayouts[name || base.layout || o.layout] = {
				mappedKeys: {},
				acceptedKeys: []
			},
			acceptedKeys = layout.acceptedKeys = o.restrictInclude ?
				('' + o.restrictInclude).split(/\s+/) || [] :
				[],
			// using $layout temporarily to hold keyboard popup classnames
			$layout = kbcss.keyboard + ' ' + o.css.popup + ' ' + o.css.container +
				(o.alwaysOpen || o.userClosed ? ' ' + kbcss.alwaysOpen : ''),

			container = $('<div />')
				.addClass($layout)
				.attr({
					'role': 'textbox'
				})
				.hide();
		// verify layout or setup custom keyboard
		if ((internal && o.layout === 'custom') || !$keyboard.layouts.hasOwnProperty(o.layout)) {
			o.layout = 'custom';
			$layout = $keyboard.layouts.custom = o.customLayout || {
				'normal': ['{cancel}']
			};
		} else {
			$layout = $keyboard.layouts[internal ? o.layout : name || base.layout || o.layout];
		}

		// Main keyboard building loop
		$.each($layout, function (set, keySet) {
			// skip layout name & lang settings
			if (set !== '' && !/^(name|lang|rtl)$/i.test(set)) {
				// keep backwards compatibility for change from default to normal naming
				if (set === 'default') {
					set = 'normal';
				}
				sets++;
				$row = $('<div />')
					.attr('name', set) // added for typing extension
					.addClass(kbcss.keySet + ' ' + kbcss.keySet + '-' + set)
					.appendTo(container)
					.toggle(set === 'normal');

				for (row = 0; row < keySet.length; row++) {
					// remove extra spaces before spliting (regex probably could be improved)
					currentSet = $.trim(keySet[row]).replace(/\{(\.?)[\s+]?:[\s+]?(\.?)\}/g, '{$1:$2}');
					base.buildRow($row, row, currentSet.split(/\s+/), acceptedKeys);
					$row.find('.' + kbcss.keyButton + ',.' + kbcss.keySpacer)
						.filter(':last')
						.after('<br class="' + kbcss.endRow + '"/>');
				}
			}
		});

		if (sets > 1) {
			base.sets = true;
		}
		layout.hasMappedKeys = !($.isEmptyObject(layout.mappedKeys));
		layout.$keyboard = container;
		return container;
	};

	base.buildRow = function ($row, row, keys, acceptedKeys) {
		var t, txt, key, isAction, action, margin,
			kbcss = $keyboard.css;
		for (key = 0; key < keys.length; key++) {
			// used by addKey function
			base.temp = [$row, row, key];
			isAction = false;

			// ignore empty keys
			if (keys[key].length === 0) {
				continue;
			}

			// process here if it's an action key
			if (/^\{\S+\}$/.test(keys[key])) {
				action = keys[key].match(/^\{(\S+)\}$/)[1];
				// add active class if there are double exclamation points in the name
				if (/\!\!/.test(action)) {
					action = action.replace('!!', '');
					isAction = true;
				}

				// add empty space
				if (/^sp:((\d+)?([\.|,]\d+)?)(em|px)?$/i.test(action)) {
					// not perfect globalization, but allows you to use {sp:1,1em}, {sp:1.2em} or {sp:15px}
					margin = parseFloat(action
						.replace(/,/, '.')
						.match(/^sp:((\d+)?([\.|,]\d+)?)(em|px)?$/i)[1] || 0
					);
					$('<span class="' + kbcss.keyText + '"></span>')
						// previously {sp:1} would add 1em margin to each side of a 0 width span
						// now Firefox doesn't seem to render 0px dimensions, so now we set the
						// 1em margin x 2 for the width
						.width((action.match(/px/i) ? margin + 'px' : (margin * 2) + 'em'))
						.addClass(kbcss.keySpacer)
						.appendTo($row);
				}

				// add empty button
				if (/^empty(:((\d+)?([\.|,]\d+)?)(em|px)?)?$/i.test(action)) {
					margin = (/:/.test(action)) ? parseFloat(action
						.replace(/,/, '.')
						.match(/^empty:((\d+)?([\.|,]\d+)?)(em|px)?$/i)[1] || 0
					) : '';
					base
						.addKey('', ' ', true)
						.addClass(o.css.buttonDisabled + ' ' + o.css.buttonEmpty)
						.attr('aria-disabled', true)
						.width(margin ? (action.match('px') ? margin + 'px' : (margin * 2) + 'em') : '');
					continue;
				}

				// meta keys
				if (/^meta[\w-]+\:?(\w+)?/i.test(action)) {
					base
						.addKey(action.split(':')[0], action)
						.addClass(kbcss.keyHasActive);
					continue;
				}

				// switch needed for action keys with multiple names/shortcuts or
				// default will catch all others
				txt = action.split(':');
				switch (txt[0].toLowerCase()) {

				case 'a':
				case 'accept':
					base
						.addKey('accept', action)
						.addClass(o.css.buttonAction + ' ' + kbcss.keyAction);
					break;

				case 'alt':
				case 'altgr':
					base
						.addKey('alt', action)
						.addClass(kbcss.keyHasActive);
					break;

				case 'b':
				case 'bksp':
					base.addKey('bksp', action);
					break;

				case 'c':
				case 'cancel':
					base
						.addKey('cancel', action)
						.addClass(o.css.buttonAction + ' ' + kbcss.keyAction);
					break;

					// toggle combo/diacritic key
					/*jshint -W083 */
				case 'combo':
					base
						.addKey('combo', action)
						.addClass(kbcss.keyHasActive)
						.attr('title', function (indx, title) {
							// add combo key state to title
							return title + ' ' + o.display[o.useCombos ? 'active' : 'disabled'];
						})
						.toggleClass(o.css.buttonActive, o.useCombos);
					break;

					// Decimal - unique decimal point (num pad layout)
				case 'dec':
					acceptedKeys.push((base.decimal) ? '.' : ',');
					base.addKey('dec', action);
					break;

				case 'e':
				case 'enter':
					base
						.addKey('enter', action)
						.addClass(o.css.buttonAction + ' ' + kbcss.keyAction);
					break;

				case 'lock':
					base
						.addKey('lock', action)
						.addClass(kbcss.keyHasActive);
					break;

				case 's':
				case 'shift':
					base
						.addKey('shift', action)
						.addClass(kbcss.keyHasActive);
					break;

					// Change sign (for num pad layout)
				case 'sign':
					acceptedKeys.push('-');
					base.addKey('sign', action);
					break;

				case 'space':
					acceptedKeys.push(' ');
					base.addKey('space', action);
					break;

				case 't':
				case 'tab':
					base.addKey('tab', action);
					break;

				default:
					if ($keyboard.keyaction.hasOwnProperty(txt[0])) {
						base
							.addKey(txt[0], action)
							.toggleClass(o.css.buttonAction + ' ' + kbcss.keyAction, isAction);
					}

				}

			} else {

				// regular button (not an action key)
				t = keys[key];
				base.addKey(t, t, true);
			}
		}
	};

	base.removeBindings = function (namespace) {
		$(document).unbind(namespace);
		if (base.el.ownerDocument !== document) {
			$(base.el.ownerDocument).unbind(namespace);
		}
		$(window).unbind(namespace);
		base.$el.unbind(namespace);
	};

	base.removeKeyboard = function () {
		base.$allKeys = [];
		base.$decBtn = [];
		// base.$preview === base.$el when o.usePreview is false - fixes #442
		if (o.usePreview) {
			base.$preview.removeData('keyboard');
		}
		base.preview = null;
		base.$preview = null;
		base.$previewCopy = null;
		base.$keyboard.removeData('keyboard');
		base.$keyboard.remove();
		base.$keyboard = [];
		base.isOpen = false;
		base.isCurrent(false);
	};

	base.destroy = function (callback) {
		var index,
			kbcss = $keyboard.css,
			len = base.extensionNamespace.length,
			tmp = [
				kbcss.input,
				kbcss.locked,
				kbcss.placeholder,
				kbcss.noKeyboard,
				kbcss.alwaysOpen,
				o.css.input,
				kbcss.isCurrent
			].join(' ');
		clearTimeout(base.timer);
		clearTimeout(base.timer2);
		if (base.$keyboard.length) {
			base.removeKeyboard();
		}
		base.removeBindings(base.namespace);
		base.removeBindings(base.namespace + 'callbacks');
		for (index = 0; index < len; index++) {
			base.removeBindings(base.extensionNamespace[index]);
		}
		base.el.active = false;

		base.$el
			.removeClass(tmp)
			.removeAttr('aria-haspopup')
			.removeAttr('role')
			.removeData('keyboard');
		base = null;

		if (typeof callback === 'function') {
			callback();
		}
	};

	// Run initializer
	base.init();

	}; // end $.keyboard definition

	// event.which & ASCII values
	$keyboard.keyCodes = {
		backSpace: 8,
		tab: 9,
		enter: 13,
		capsLock: 20,
		escape: 27,
		space: 32,
		pageUp: 33,
		pageDown: 34,
		end: 35,
		home: 36,
		left: 37,
		up: 38,
		right: 39,
		down: 40,
		insert: 45,
		delete: 46,
		// event.which keyCodes (uppercase letters)
		A: 65,
		Z: 90,
		V: 86,
		C: 67,
		X: 88,

		// ASCII lowercase a & z
		a: 97,
		z: 122
	};

	$keyboard.css = {
		// keyboard id suffix
		idSuffix: '_keyboard',
		// class name to set initial focus
		initialFocus: 'keyboard-init-focus',
		// element class names
		input: 'ui-keyboard-input',
		inputClone: 'ui-keyboard-preview-clone',
		wrapper: 'ui-keyboard-preview-wrapper',
		preview: 'ui-keyboard-preview',
		keyboard: 'ui-keyboard',
		keySet: 'ui-keyboard-keyset',
		keyButton: 'ui-keyboard-button',
		keyWide: 'ui-keyboard-widekey',
		keyPrefix: 'ui-keyboard-',
		keyText: 'ui-keyboard-text', // span with button text
		keyHasActive: 'ui-keyboard-hasactivestate',
		keyAction: 'ui-keyboard-actionkey',
		keySpacer: 'ui-keyboard-spacer', // empty keys
		keyToggle: 'ui-keyboard-toggle',
		keyDisabled: 'ui-keyboard-disabled',
		// states
		locked: 'ui-keyboard-lockedinput',
		alwaysOpen: 'ui-keyboard-always-open',
		noKeyboard: 'ui-keyboard-nokeyboard',
		placeholder: 'ui-keyboard-placeholder',
		hasFocus: 'ui-keyboard-has-focus',
		isCurrent: 'ui-keyboard-input-current',
		// validation & autoaccept
		inputValid: 'ui-keyboard-valid-input',
		inputInvalid: 'ui-keyboard-invalid-input',
		inputAutoAccepted: 'ui-keyboard-autoaccepted',
		endRow: 'ui-keyboard-button-endrow' // class added to <br>
	};

	$keyboard.events = {
		// keyboard events
		kbChange: 'keyboardChange',
		kbBeforeClose: 'beforeClose',
		kbBeforeVisible: 'beforeVisible',
		kbVisible: 'visible',
		kbInit: 'initialized',
		kbInactive: 'inactive',
		kbHidden: 'hidden',
		kbRepeater: 'repeater',
		kbKeysetChange: 'keysetChange',
		// input events
		inputAccepted: 'accepted',
		inputCanceled: 'canceled',
		inputChange: 'change',
		inputRestricted: 'restricted'
	};

	// Action key function list
	$keyboard.keyaction = {
		accept: function (base) {
			base.close(true); // same as base.accept();
			return false; // return false prevents further processing
		},
		alt: function (base) {
			base.altActive = !base.altActive;
			base.showSet();
		},
		bksp: function (base) {
			// the script looks for the '\b' string and initiates a backspace
			base.insertText('\b');
		},
		cancel: function (base) {
			base.close();
			return false; // return false prevents further processing
		},
		clear: function (base) {
			base.$preview.val('');
			if (base.$decBtn.length) {
				base.checkDecimal();
			}
		},
		combo: function (base) {
			var o = base.options,
				c = !o.useCombos,
				$combo = base.$keyboard.find('.' + $keyboard.css.keyPrefix + 'combo');
			o.useCombos = c;
			$combo
				.toggleClass(o.css.buttonActive, c)
				// update combo key state
				.attr('title', $combo.attr('data-title') + ' (' + o.display[c ? 'active' : 'disabled'] + ')');
			if (c) {
				base.checkCombos();
			}
			return false;
		},
		dec: function (base) {
			base.insertText((base.decimal) ? '.' : ',');
		},
		del: function (base) {
			// the script looks for the '{d}' string and initiates a delete
			base.insertText('{d}');
		},
		// resets to base keyset (deprecated because "default" is a reserved word)
		'default': function (base) {
			base.shiftActive = base.altActive = base.metaActive = false;
			base.showSet();
		},
		// el is the pressed key (button) object; it is null when the real keyboard enter is pressed
		enter: function (base, el, e) {
			var tag = base.el.nodeName,
				o = base.options;
			// shift+enter in textareas
			if (e.shiftKey || base.shiftActive) {
				// textarea & input - enterMod + shift + enter = accept, then go to prev;
				//  base.switchInput(goToNext, autoAccept)
				// textarea & input - shift + enter = accept (no navigation)
				return (o.enterNavigation) ? base.switchInput(!e[o.enterMod], true) : base.close(true);
			}
			// input only - enterMod + enter to navigate
			if (o.enterNavigation && (tag !== 'TEXTAREA' || e[o.enterMod])) {
				return base.switchInput(!e[o.enterMod], o.autoAccept ? 'true' : false);
			}
			// pressing virtual enter button inside of a textarea - add a carriage return
			// e.target is span when clicking on text and button at other times
			if (tag === 'TEXTAREA' && $(e.target).closest('button').length) {
				// IE8 fix (space + \n) - fixes #71 thanks Blookie!
				base.insertText(($keyboard.msie ? ' ' : '') + '\n');
			}
		},
		// caps lock key
		lock: function (base) {
			base.last.keyset[0] = base.shiftActive = base.capsLock = !base.capsLock;
			base.showSet();
		},
		left: function (base) {
			var p = $keyboard.caret(base.$preview);
			if (p.start - 1 >= 0) {
				// move both start and end of caret (prevents text selection) & save caret position
				base.last.start = base.last.end = p.start - 1;
				$keyboard.caret(base.$preview, base.last);
				base.setScroll();
			}
		},
		meta: function (base, el) {
			var $el = $(el);
			base.metaActive = !$el.hasClass(base.options.css.buttonActive);
			base.showSet($el.attr('data-name'));
		},
		next: function (base) {
			base.switchInput(true, base.options.autoAccept);
			return false;
		},
		// same as 'default' - resets to base keyset
		normal: function (base) {
			base.shiftActive = base.altActive = base.metaActive = false;
			base.showSet();
		},
		prev: function (base) {
			base.switchInput(false, base.options.autoAccept);
			return false;
		},
		right: function (base) {
			var p = $keyboard.caret(base.$preview);
			if (p.start + 1 <= base.$preview.val().length) {
				// move both start and end of caret (prevents text selection) && save caret position
				base.last.start = base.last.end = p.start + 1;
				$keyboard.caret(base.$preview, base.last);
				base.setScroll();
			}
		},
		shift: function (base) {
			base.last.keyset[0] = base.shiftActive = !base.shiftActive;
			base.showSet();
		},
		sign: function (base) {
			if (/^\-?\d*\.?\d*$/.test(base.$preview.val())) {
				base.$preview.val((base.$preview.val() * -1));
			}
		},
		space: function (base) {
			base.insertText(' ');
		},
		tab: function (base) {
			var tag = base.el.nodeName,
				o = base.options;
			if (tag === 'INPUT') {
				if (o.tabNavigation) {
					return base.switchInput(!base.shiftActive, true);
				} else {
					// ignore tab key in input
					return false;
				}
			}
			base.insertText('\t');
		},
		toggle: function (base) {
			base.enabled = !base.enabled;
			base.toggle();
		},
		// *** Special action keys: NBSP & zero-width characters ***
		// Non-breaking space
		NBSP: '\u00a0',
		// zero width space
		ZWSP: '\u200b',
		// Zero width non-joiner
		ZWNJ: '\u200c',
		// Zero width joiner
		ZWJ: '\u200d',
		// Left-to-right Mark
		LRM: '\u200e',
		// Right-to-left Mark
		RLM: '\u200f'
	};

	// Default keyboard layouts
	$keyboard.builtLayouts = {};
	$keyboard.layouts = {
		'alpha': {
			'normal': [
				'` 1 2 3 4 5 6 7 8 9 0 - = {bksp}',
				'{tab} a b c d e f g h i j [ ] \\',
				'k l m n o p q r s ; \' {enter}',
				'{shift} t u v w x y z , . / {shift}',
				'{accept} {space} {cancel}'
			],
			'shift': [
				'~ ! @ # $ % ^ & * ( ) _ + {bksp}',
				'{tab} A B C D E F G H I J { } |',
				'K L M N O P Q R S : " {enter}',
				'{shift} T U V W X Y Z < > ? {shift}',
				'{accept} {space} {cancel}'
			]
		},
		'qwerty': {
			'normal': [
				'` 1 2 3 4 5 6 7 8 9 0 - = {bksp}',
				'{tab} q w e r t y u i o p [ ] \\',
				'a s d f g h j k l ; \' {enter}',
				'{shift} z x c v b n m , . / {shift}',
				'{accept} {space} {cancel}'
			],
			'shift': [
				'~ ! @ # $ % ^ & * ( ) _ + {bksp}',
				'{tab} Q W E R T Y U I O P { } |',
				'A S D F G H J K L : " {enter}',
				'{shift} Z X C V B N M < > ? {shift}',
				'{accept} {space} {cancel}'
			]
		},
		'international': {
			'normal': [
				'` 1 2 3 4 5 6 7 8 9 0 - = {bksp}',
				'{tab} q w e r t y u i o p [ ] \\',
				'a s d f g h j k l ; \' {enter}',
				'{shift} z x c v b n m , . / {shift}',
				'{accept} {alt} {space} {alt} {cancel}'
			],
			'shift': [
				'~ ! @ # $ % ^ & * ( ) _ + {bksp}',
				'{tab} Q W E R T Y U I O P { } |',
				'A S D F G H J K L : " {enter}',
				'{shift} Z X C V B N M < > ? {shift}',
				'{accept} {alt} {space} {alt} {cancel}'
			],
			'alt': [
				'~ \u00a1 \u00b2 \u00b3 \u00a4 \u20ac \u00bc \u00bd \u00be \u2018 \u2019 \u00a5 \u00d7 {bksp}',
				'{tab} \u00e4 \u00e5 \u00e9 \u00ae \u00fe \u00fc \u00fa \u00ed \u00f3 \u00f6 \u00ab \u00bb \u00ac',
				'\u00e1 \u00df \u00f0 f g h j k \u00f8 \u00b6 \u00b4 {enter}',
				'{shift} \u00e6 x \u00a9 v b \u00f1 \u00b5 \u00e7 > \u00bf {shift}',
				'{accept} {alt} {space} {alt} {cancel}'
			],
			'alt-shift': [
				'~ \u00b9 \u00b2 \u00b3 \u00a3 \u20ac \u00bc \u00bd \u00be \u2018 \u2019 \u00a5 \u00f7 {bksp}',
				'{tab} \u00c4 \u00c5 \u00c9 \u00ae \u00de \u00dc \u00da \u00cd \u00d3 \u00d6 \u00ab \u00bb \u00a6',
				'\u00c4 \u00a7 \u00d0 F G H J K \u00d8 \u00b0 \u00a8 {enter}',
				'{shift} \u00c6 X \u00a2 V B \u00d1 \u00b5 \u00c7 . \u00bf {shift}',
				'{accept} {alt} {space} {alt} {cancel}'
			]
		},
		'colemak': {
			'normal': [
				'` 1 2 3 4 5 6 7 8 9 0 - = {bksp}',
				'{tab} q w f p g j l u y ; [ ] \\',
				'{bksp} a r s t d h n e i o \' {enter}',
				'{shift} z x c v b k m , . / {shift}',
				'{accept} {space} {cancel}'
			],
			'shift': [
				'~ ! @ # $ % ^ & * ( ) _ + {bksp}',
				'{tab} Q W F P G J L U Y : { } |',
				'{bksp} A R S T D H N E I O " {enter}',
				'{shift} Z X C V B K M < > ? {shift}',
				'{accept} {space} {cancel}'
			]
		},
		'dvorak': {
			'normal': [
				'` 1 2 3 4 5 6 7 8 9 0 [ ] {bksp}',
				'{tab} \' , . p y f g c r l / = \\',
				'a o e u i d h t n s - {enter}',
				'{shift} ; q j k x b m w v z {shift}',
				'{accept} {space} {cancel}'
			],
			'shift': [
				'~ ! @ # $ % ^ & * ( ) { } {bksp}',
				'{tab} " < > P Y F G C R L ? + |',
				'A O E U I D H T N S _ {enter}',
				'{shift} : Q J K X B M W V Z {shift}',
				'{accept} {space} {cancel}'
			]
		},
		'num': {
			'normal': [
				'= ( ) {b}',
				'{clear} / * -',
				'7 8 9 +',
				'4 5 6 {sign}',
				'1 2 3 %',
				'0 {dec} {a} {c}'
			]
		}
	};

	$keyboard.language = {
		en: {
			display: {
				// check mark - same action as accept
				'a': '\u2714:Accept (Shift+Enter)',
				'accept': 'Accept:Accept (Shift+Enter)',
				// other alternatives \u2311
				'alt': 'Alt:\u2325 AltGr',
				// Left arrow (same as &larr;)
				'b': '\u232b:Backspace',
				'bksp': 'Bksp:Backspace',
				// big X, close - same action as cancel
				'c': '\u2716:Cancel (Esc)',
				'cancel': 'Cancel:Cancel (Esc)',
				// clear num pad
				'clear': 'C:Clear',
				'combo': '\u00f6:Toggle Combo Keys',
				// decimal point for num pad (optional), change '.' to ',' for European format
				'dec': '.:Decimal',
				// down, then left arrow - enter symbol
				'e': '\u23ce:Enter',
				'empty': '\u00a0',
				'enter': 'Enter:Enter \u23ce',
				// left arrow (move caret)
				'left': '\u2190',
				// caps lock
				'lock': 'Lock:\u21ea Caps Lock',
				'next': 'Next \u21e8',
				'prev': '\u21e6 Prev',
				// right arrow (move caret)
				'right': '\u2192',
				// thick hollow up arrow
				's': '\u21e7:Shift',
				'shift': 'Shift:Shift',
				// +/- sign for num pad
				'sign': '\u00b1:Change Sign',
				'space': '\u00a0:Space',
				// right arrow to bar (used since this virtual keyboard works with one directional tabs)
				't': '\u21e5:Tab',
				// \u21b9 is the true tab symbol (left & right arrows)
				'tab': '\u21e5 Tab:Tab',
				// replaced by an image
				'toggle': ' ',

				// added to titles of keys
				// accept key status when acceptValid:true
				'valid': 'valid',
				'invalid': 'invalid',
				// combo key states
				'active': 'active',
				'disabled': 'disabled'
			},

			// Message added to the key title while hovering, if the mousewheel plugin exists
			wheelMessage: 'Use mousewheel to see other keys',

			comboRegex: /([`\'~\^\"ao])([a-z])/mig,
			combos: {
				// grave
				'`': { a: '\u00e0', A: '\u00c0', e: '\u00e8', E: '\u00c8', i: '\u00ec', I: '\u00cc', o: '\u00f2',
						O: '\u00d2', u: '\u00f9', U: '\u00d9', y: '\u1ef3', Y: '\u1ef2' },
				// acute & cedilla
				"'": { a: '\u00e1', A: '\u00c1', e: '\u00e9', E: '\u00c9', i: '\u00ed', I: '\u00cd', o: '\u00f3',
						O: '\u00d3', u: '\u00fa', U: '\u00da', y: '\u00fd', Y: '\u00dd' },
				// umlaut/trema
				'"': { a: '\u00e4', A: '\u00c4', e: '\u00eb', E: '\u00cb', i: '\u00ef', I: '\u00cf', o: '\u00f6',
						O: '\u00d6', u: '\u00fc', U: '\u00dc', y: '\u00ff', Y: '\u0178' },
				// circumflex
				'^': { a: '\u00e2', A: '\u00c2', e: '\u00ea', E: '\u00ca', i: '\u00ee', I: '\u00ce', o: '\u00f4',
						O: '\u00d4', u: '\u00fb', U: '\u00db', y: '\u0177', Y: '\u0176' },
				// tilde
				'~': { a: '\u00e3', A: '\u00c3', e: '\u1ebd', E: '\u1ebc', i: '\u0129', I: '\u0128', o: '\u00f5',
						O: '\u00d5', u: '\u0169', U: '\u0168', y: '\u1ef9', Y: '\u1ef8', n: '\u00f1', N: '\u00d1' }
			}
		}
	};

	$keyboard.defaultOptions = {
		// set this to ISO 639-1 language code to override language set by the layout
		// http://en.wikipedia.org/wiki/List_of_ISO_639-1_codes
		// language defaults to 'en' if not found
		language: null,
		rtl: false,

		// *** choose layout & positioning ***
		layout: 'qwerty',
		customLayout: null,

		position: {
			// optional - null (attach to input/textarea) or a jQuery object (attach elsewhere)
			of: null,
			my: 'center top',
			at: 'center top',
			// used when 'usePreview' is false (centers the keyboard at the bottom of the input/textarea)
			at2: 'center bottom'
		},

		// allow jQuery position utility to reposition the keyboard on window resize
		reposition: true,

		// preview added above keyboard if true, original input/textarea used if false
		usePreview: true,

		// if true, the keyboard will always be visible
		alwaysOpen: false,

		// give the preview initial focus when the keyboard becomes visible
		initialFocus: true,

		// avoid changing the focus (hardware keyboard probably won't work)
		noFocus: false,

		// if true, keyboard will remain open even if the input loses focus, but closes on escape
		// or when another keyboard opens.
		stayOpen: false,

		// Prevents the keyboard from closing when the user clicks or presses outside the keyboard
		// the `autoAccept` option must also be set to true when this option is true or changes are lost
		userClosed: false,

		// if true, keyboard will not close if you press escape.
		ignoreEsc: false,

		// if true, keyboard will only closed on click event instead of mousedown and touchstart
		closeByClickEvent: false,

		css: {
			// input & preview
			input: 'ui-widget-content ui-corner-all',
			// keyboard container
			container: 'ui-widget-content ui-widget ui-corner-all ui-helper-clearfix',
			// keyboard container extra class (same as container, but separate)
			popup: '',
			// default state
			buttonDefault: 'ui-state-default ui-corner-all',
			// hovered button
			buttonHover: 'ui-state-hover',
			// Action keys (e.g. Accept, Cancel, Tab, etc); this replaces 'actionClass' option
			buttonAction: 'ui-state-active',
			// Active keys (e.g. shift down, meta keyset active, combo keys active)
			buttonActive: 'ui-state-active',
			// used when disabling the decimal button {dec} when a decimal exists in the input area
			buttonDisabled: 'ui-state-disabled',
			buttonEmpty: 'ui-keyboard-empty'
		},

		// *** Useability ***
		// Auto-accept content when clicking outside the keyboard (popup will close)
		autoAccept: false,
		// Auto-accept content even if the user presses escape (only works if `autoAccept` is `true`)
		autoAcceptOnEsc: false,

		// Prevents direct input in the preview window when true
		lockInput: false,

		// Prevent keys not in the displayed keyboard from being typed in
		restrictInput: false,
		// Additional allowed characters while restrictInput is true
		restrictInclude: '', // e.g. 'a b foo \ud83d\ude38'

		// Check input against validate function, if valid the accept button gets a class name of
		// 'ui-keyboard-valid-input'. If invalid, the accept button gets a class name of
		// 'ui-keyboard-invalid-input'
		acceptValid: false,
		// Auto-accept when input is valid; requires `acceptValid` set `true` & validate callback
		autoAcceptOnValid: false,

		// if acceptValid is true & the validate function returns a false, this option will cancel
		// a keyboard close only after the accept button is pressed
		cancelClose: true,

		// tab to go to next, shift-tab for previous (default behavior)
		tabNavigation: false,

		// enter for next input; shift+enter accepts content & goes to next
		// shift + 'enterMod' + enter ('enterMod' is the alt as set below) will accept content and go
		// to previous in a textarea
		enterNavigation: false,
		// mod key options: 'ctrlKey', 'shiftKey', 'altKey', 'metaKey' (MAC only)
		enterMod: 'altKey', // alt-enter to go to previous; shift-alt-enter to accept & go to previous

		// if true, the next button will stop on the last keyboard input/textarea; prev button stops at first
		// if false, the next button will wrap to target the first input/textarea; prev will go to the last
		stopAtEnd: true,

		// Set this to append the keyboard after the input/textarea (appended to the input/textarea parent).
		// This option works best when the input container doesn't have a set width & when the 'tabNavigation'
		// option is true.
		appendLocally: false,
		// When appendLocally is false, the keyboard will be appended to this object
		appendTo: 'body',

		// If false, the shift key will remain active until the next key is (mouse) clicked on; if true it will
		// stay active until pressed again
		stickyShift: true,

		// Prevent pasting content into the area
		preventPaste: false,

		// caret placed at the end of any text when keyboard becomes visible
		caretToEnd: false,

		// caret stays this many pixels from the edge of the input while scrolling left/right;
		// use "c" or "center" to center the caret while scrolling
		scrollAdjustment: 10,

		// Set the max number of characters allowed in the input, setting it to false disables this option
		maxLength: false,
		// allow inserting characters @ caret when maxLength is set
		maxInsert: true,

		// Mouse repeat delay - when clicking/touching a virtual keyboard key, after this delay the key will
		// start repeating
		repeatDelay: 500,

		// Mouse repeat rate - after the repeatDelay, this is the rate (characters per second) at which the
		// key is repeated Added to simulate holding down a real keyboard key and having it repeat. I haven't
		// calculated the upper limit of this rate, but it is limited to how fast the javascript can process
		// the keys. And for me, in Firefox, it's around 20.
		repeatRate: 20,

		// resets the keyboard to the default keyset when visible
		resetDefault: true,

		// Event (namespaced) on the input to reveal the keyboard. To disable it, just set it to ''.
		openOn: 'focus',

		// Event (namepaced) for when the character is added to the input (clicking on the keyboard)
		keyBinding: 'mousedown touchstart',

		// enable/disable mousewheel functionality
		// enabling still depends on the mousewheel plugin
		useWheel: true,

		// combos (emulate dead keys : http://en.wikipedia.org/wiki/Keyboard_layout#US-International)
		// if user inputs `a the script converts it to à, ^o becomes ô, etc.
		useCombos: true,

		/*
			// *** Methods ***
			// commenting these out to reduce the size of the minified version
			// Callbacks - attach a function to any of these callbacks as desired
			initialized   : function(e, keyboard, el) {},
			beforeVisible : function(e, keyboard, el) {},
			visible       : function(e, keyboard, el) {},
			beforeInsert  : function(e, keyboard, el, textToAdd) { return textToAdd; },
			change        : function(e, keyboard, el) {},
			beforeClose   : function(e, keyboard, el, accepted) {},
			accepted      : function(e, keyboard, el) {},
			canceled      : function(e, keyboard, el) {},
			restricted    : function(e, keyboard, el) {},
			hidden        : function(e, keyboard, el) {},
			// called instead of base.switchInput
			switchInput   : function(keyboard, goToNext, isAccepted) {},
			// used if you want to create a custom layout or modify the built-in keyboard
			create        : function(keyboard) { return keyboard.buildKeyboard(); },

			// build key callback
			buildKey : function( keyboard, data ) {
				/ *
				data = {
				// READ ONLY
				isAction : [boolean] true if key is an action key
				name     : [string]  key class name suffix ( prefix = 'ui-keyboard-' );
				                     may include decimal ascii value of character
				value    : [string]  text inserted (non-action keys)
				title    : [string]  title attribute of key
				action   : [string]  keyaction name
				html     : [string]  HTML of the key; it includes a <span> wrapping the text
				// use to modify key HTML
				$key     : [object]  jQuery selector of key which is already appended to keyboard
				}
				* /
				return data;
			},
		*/

		// this callback is called, if the acceptValid is true, and just before the 'beforeClose' to check
		// the value if the value is valid, return true and the keyboard will continue as it should
		// (close if not always open, etc). If the value is not valid, return false and clear the keyboard
		// value ( like this "keyboard.$preview.val('');" ), if desired. The validate function is called after
		// each input, the 'isClosing' value will be false; when the accept button is clicked,
		// 'isClosing' is true
		validate: function (keyboard, value, isClosing) {
			return true;
		}

	};

	// for checking combos
	$keyboard.comboRegex = /([`\'~\^\"ao])([a-z])/mig;

	// store current keyboard element; used by base.isCurrent()
	$keyboard.currentKeyboard = '';

	$('<!--[if lte IE 8]><script>jQuery("body").addClass("oldie");</script><![endif]--><!--[if IE]>' +
			'<script>jQuery("body").addClass("ie");</script><![endif]-->')
		.appendTo('body')
		.remove();
	$keyboard.msie = $('body').hasClass('oldie'); // Old IE flag, used for caret positioning
	$keyboard.allie = $('body').hasClass('ie');

	$keyboard.watermark = (typeof (document.createElement('input').placeholder) !== 'undefined');

	$keyboard.checkCaretSupport = function () {
		if (typeof $keyboard.checkCaret !== 'boolean') {
			// Check if caret position is saved when input is hidden or loses focus
			// (*cough* all versions of IE and I think Opera has/had an issue as well
			var $temp = $('<div style="height:0px;width:0px;overflow:hidden;position:fixed;top:0;left:-100px;">' +
				'<input type="text" value="testing"/></div>').prependTo('body'); // stop page scrolling
			$keyboard.caret($temp.find('input'), 3, 3);
			// Also save caret position of the input if it is locked
			$keyboard.checkCaret = $keyboard.caret($temp.find('input').hide().show()).start !== 3;
			$temp.remove();
		}
		return $keyboard.checkCaret;
	};

	$keyboard.caret = function ($el, param1, param2) {
		if (!$el || !$el.length || $el.is(':hidden') || $el.css('visibility') === 'hidden') {
			return {};
		}
		var start, end, txt, pos,
			kb = $el.data('keyboard'),
			noFocus = kb && kb.options.noFocus;
		if (!noFocus) {
			$el.focus();
		}
		// set caret position
		if (typeof param1 !== 'undefined') {
			// allow setting caret using ( $el, { start: x, end: y } )
			if (typeof param1 === 'object' && 'start' in param1 && 'end' in param1) {
				start = param1.start;
				end = param1.end;
			} else if (typeof param2 === 'undefined') {
				param2 = param1; // set caret using start position
			}
			// set caret using ( $el, start, end );
			if (typeof param1 === 'number' && typeof param2 === 'number') {
				start = param1;
				end = param2;
			} else if (param1 === 'start') {
				start = end = 0;
			} else if (typeof param1 === 'string') {
				// unknown string setting, move caret to end
				start = end = $el.val().length;
			}

			// *** SET CARET POSITION ***
			// modify the line below to adapt to other caret plugins
			return $el.caret(start, end, noFocus);
		}
		// *** GET CARET POSITION ***
		// modify the line below to adapt to other caret plugins
		pos = $el.caret();
		start = pos.start;
		end = pos.end;

		// *** utilities ***
		txt = ($el[0].value || $el.text() || '');
		return {
			start: start,
			end: end,
			// return selected text
			text: txt.substring(start, end),
			// return a replace selected string method
			replaceStr: function (str) {
				return txt.substring(0, start) + str + txt.substring(end, txt.length);
			}
		};
	};

	$.fn.keyboard = function (options) {
		return this.each(function () {
			if (!$(this).data('keyboard')) {
				/*jshint nonew:false */
				(new $.keyboard(this, options));
			}
		});
	};

	$.fn.getkeyboard = function () {
		return this.data('keyboard');
	};

	/* Copyright (c) 2010 C. F., Wong (<a href="http://cloudgen.w0ng.hk">Cloudgen Examplet Store</a>)
	 * Licensed under the MIT License:
	 * http://www.opensource.org/licenses/mit-license.php
	 * Highly modified from the original
	 */

	$.fn.caret = function (start, end, noFocus) {
		if (typeof this[0] === 'undefined' || this.is(':hidden') || this.css('visibility') === 'hidden') {
			return this;
		}
		var selRange, range, stored_range, txt, val,
			selection = document.selection,
			$el = this,
			el = $el[0],
			sTop = el.scrollTop,
			ss = false,
			supportCaret = true;
		try {
			ss = 'selectionStart' in el;
		} catch (err) {
			supportCaret = false;
		}
		if (supportCaret && typeof start !== 'undefined') {
			if (!/(email|number)/i.test(el.type)) {
				if (ss) {
					el.selectionStart = start;
					el.selectionEnd = end;
				} else {
					selRange = el.createTextRange();
					selRange.collapse(true);
					selRange.moveStart('character', start);
					selRange.moveEnd('character', end - start);
					selRange.select();
				}
			}
			// must be visible or IE8 crashes; IE9 in compatibility mode works fine - issue #56
			if (!noFocus && ($el.is(':visible') || $el.css('visibility') !== 'hidden')) {
				el.focus();
			}
			el.scrollTop = sTop;
			return this;
		} else {
			if (/(email|number)/i.test(el.type)) {
				// fix suggested by raduanastase (https://github.com/Mottie/Keyboard/issues/105#issuecomment-40456535)
				start = end = $el.val().length;
			} else if (ss) {
				start = el.selectionStart;
				end = el.selectionEnd;
			} else if (selection) {
				if (el.nodeName === 'TEXTAREA') {
					val = $el.val();
					range = selection.createRange();
					stored_range = range.duplicate();
					stored_range.moveToElementText(el);
					stored_range.setEndPoint('EndToEnd', range);
					// thanks to the awesome comments in the rangy plugin
					start = stored_range.text.replace(/\r/g, '\n').length;
					end = start + range.text.replace(/\r/g, '\n').length;
				} else {
					val = $el.val().replace(/\r/g, '\n');
					range = selection.createRange().duplicate();
					range.moveEnd('character', val.length);
					start = (range.text === '' ? val.length : val.lastIndexOf(range.text));
					range = selection.createRange().duplicate();
					range.moveStart('character', -val.length);
					end = range.text.length;
				}
			} else {
				// caret positioning not supported
				start = end = (el.value || '').length;
			}
			txt = (el.value || '');
			return {
				start: start,
				end: end,
				text: txt.substring(start, end),
				replace: function (str) {
					return txt.substring(0, start) + str + txt.substring(end, txt.length);
				}
			};
		}
	};

	return $keyboard;

}));