luci-base: move dropdown, combox and dynlist widget code to L.ui

Move the widget code to the ui class and replace it with compatibility
shims in cbi.js

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

2 files changed, 1083 insertions, 830 deletions

diff --git a/modules/luci-base/htdocs/luci-static/resources/cbi.js b/modules/luci-base/htdocs/luci-static/resources/cbi.js
index 3131ccbaa..745f01244 100644
--- a/modules/luci-base/htdocs/luci-static/resources/cbi.js
+++ b/modules/luci-base/htdocs/luci-static/resources/cbi.js
@@ -738,6 +738,11 @@ function cbi_d_update() {
 function cbi_init() {
 	var nodes;
 
+	document.querySelectorAll('.cbi-dropdown').forEach(function(node) {
+		cbi_dropdown_init(node);
+		node.addEventListener('cbi-dropdown-change', cbi_d_update);
+	});
+
 	nodes = document.querySelectorAll('[data-strings]');
 
 	for (var i = 0, node; (node = nodes[i]) !== undefined; i++) {
@@ -772,8 +777,8 @@ function cbi_init() {
 	nodes = document.querySelectorAll('[data-choices]');
 
 	for (var i = 0, node; (node = nodes[i]) !== undefined; i++) {
-		var choices = JSON.parse(node.getAttribute('data-choices'));
-		var options = {};
+		var choices = JSON.parse(node.getAttribute('data-choices')),
+		    options = {};
 
 		for (var j = 0; j < choices[0].length; j++)
 			options[choices[0][j]] = choices[1][j];
@@ -781,15 +786,24 @@ function cbi_init() {
 		var def = (node.getAttribute('data-optional') === 'true')
 			? node.placeholder || '' : null;
 
-		cbi_combobox_init(node, options, def,
-		                  node.getAttribute('data-manual'));
+		var cb = new L.ui.Combobox(node.value, options, {
+			name: node.getAttribute('name'),
+			sort: choices[0],
+			select_placeholder: def || _('-- Please choose --'),
+			custom_placeholder: node.getAttribute('data-manual') || _('-- custom --')
+		});
+
+		var n = cb.render();
+		n.addEventListener('cbi-dropdown-change', cbi_d_update);
+		node.parentNode.replaceChild(n, node);
 	}
 
 	nodes = document.querySelectorAll('[data-dynlist]');
 
 	for (var i = 0, node; (node = nodes[i]) !== undefined; i++) {
-		var choices = JSON.parse(node.getAttribute('data-dynlist'));
-		var options = null;
+		var choices = JSON.parse(node.getAttribute('data-dynlist')),
+		    values = JSON.parse(node.getAttribute('data-values') || '[]'),
+		    options = null;
 
 		if (choices[0] && choices[0].length) {
 			options = {};
@@ -798,8 +812,17 @@ function cbi_init() {
 				options[choices[0][j]] = choices[1][j];
 		}
 
-		cbi_dynlist_init(node, choices[2], choices[3], options);
-		node.addEventListener('cbi-dynlist-change', cbi_d_update);
+		var dl = new L.ui.DynamicList(values, options, {
+			name: node.getAttribute('data-prefix'),
+			sort: choices[0],
+			datatype: choices[2],
+			optional: choices[3],
+			placeholder: node.getAttribute('data-placeholder')
+		});
+
+		var n = dl.render();
+		n.addEventListener('cbi-dynlist-change', cbi_d_update);
+		node.parentNode.replaceChild(n, node);
 	}
 
 	nodes = document.querySelectorAll('[data-type]');
@@ -809,11 +832,6 @@ function cbi_init() {
 		                   node.getAttribute('data-type'));
 	}
 
-	document.querySelectorAll('.cbi-dropdown').forEach(function(node) {
-		cbi_dropdown_init(node);
-		node.addEventListener('cbi-dropdown-change', cbi_d_update);
-	});
-
 	document.querySelectorAll('[data-browser]').forEach(cbi_browser_init);
 
 	document.querySelectorAll('.cbi-tooltip:not(:empty)').forEach(function(s) {
@@ -835,46 +853,6 @@ function cbi_init() {
 	cbi_d_update();
 }
 
-function cbi_combobox_init(id, values, def, man) {
-	var obj = (typeof(id) === 'string') ? document.getElementById(id) : id;
-	var sb = E('div', {
-		'name': obj.name,
-		'class': 'cbi-dropdown',
-		'display-items': 5,
-		'optional': obj.getAttribute('data-optional'),
-		'placeholder': _('-- Please choose --'),
-		'data-type': obj.getAttribute('data-type'),
-		'data-optional': obj.getAttribute('data-optional')
-	}, [ E('ul') ]);
-
-	if (!(obj.value in values) && obj.value.length) {
-		sb.lastElementChild.appendChild(E('li', {
-			'data-value': obj.value,
-			'selected': ''
-		}, obj.value.length ? obj.value : (def || _('-- Please choose --'))));
-	}
-
-	for (var i in values) {
-		sb.lastElementChild.appendChild(E('li', {
-			'data-value': i,
-			'selected': (i == obj.value) ? '' : null
-		}, values[i]));
-	}
-
-	sb.lastElementChild.appendChild(E('li', { 'data-value': '-' }, [
-		E('input', {
-			'type': 'text',
-			'class': 'create-item-input',
-			'data-type': obj.getAttribute('data-type'),
-			'data-optional': true,
-			'placeholder': (man || _('-- custom --'))
-		})
-	]));
-
-	sb.value = obj.value;
-	obj.parentNode.replaceChild(sb, obj);
-}
-
 function cbi_filebrowser(id, defpath) {
 	var field   = L.dom.elem(id) ? id : document.getElementById(id);
 	var browser = window.open(
@@ -898,171 +876,6 @@ function cbi_browser_init(field)
 		}), field.nextSibling);
 }
 
-CBIDynamicList = {
-	addItem: function(dl, value, text, flash) {
-		var exists = false,
-		    new_item = E('div', { 'class': flash ? 'item flash' : 'item', 'tabindex': 0 }, [
-				E('span', {}, text || value),
-				E('input', {
-					'type': 'hidden',
-					'name': dl.getAttribute('data-prefix'),
-					'value': value })]);
-
-		dl.querySelectorAll('.item, .add-item').forEach(function(item) {
-			if (exists)
-				return;
-
-			var hidden = item.querySelector('input[type="hidden"]');
-
-			if (hidden && hidden.value === value)
-				exists = true;
-			else if (!hidden || hidden.value >= value)
-				exists = !!item.parentNode.insertBefore(new_item, item);
-		});
-
-		dl.dispatchEvent(new CustomEvent('cbi-dynlist-change', {
-			bubbles: true,
-			detail: {
-				instance: this,
-				element: dl,
-				value: value,
-				add: true
-			}
-		}));
-	},
-
-	removeItem: function(dl, item) {
-		var value = item.querySelector('input[type="hidden"]').value;
-		var sb = dl.querySelector('.cbi-dropdown');
-		if (sb)
-			sb.querySelectorAll('ul > li').forEach(function(li) {
-				if (li.getAttribute('data-value') === value)
-					li.removeAttribute('unselectable');
-			});
-
-		item.parentNode.removeChild(item);
-
-		dl.dispatchEvent(new CustomEvent('cbi-dynlist-change', {
-			bubbles: true,
-			detail: {
-				instance: this,
-				element: dl,
-				value: value,
-				remove: true
-			}
-		}));
-	},
-
-	handleClick: function(ev) {
-		var dl = ev.currentTarget,
-		    item = findParent(ev.target, '.item');
-
-		if (item) {
-			this.removeItem(dl, item);
-		}
-		else if (matchesElem(ev.target, '.cbi-button-add')) {
-			var input = ev.target.previousElementSibling;
-			if (input.value.length && !input.classList.contains('cbi-input-invalid')) {
-				this.addItem(dl, input.value, null, true);
-				input.value = '';
-			}
-		}
-	},
-
-	handleDropdownChange: function(ev) {
-		var dl = ev.currentTarget,
-		    sbIn = ev.detail.instance,
-		    sbEl = ev.detail.element,
-		    sbVal = ev.detail.value;
-
-		if (sbVal === null)
-			return;
-
-		sbIn.setValues(sbEl, null);
-		sbVal.element.setAttribute('unselectable', '');
-
-		this.addItem(dl, sbVal.value, sbVal.text, true);
-	},
-
-	handleKeydown: function(ev) {
-		var dl = ev.currentTarget,
-		    item = findParent(ev.target, '.item');
-
-		if (item) {
-			switch (ev.keyCode) {
-			case 8: /* backspace */
-				if (item.previousElementSibling)
-					item.previousElementSibling.focus();
-
-				this.removeItem(dl, item);
-				break;
-
-			case 46: /* delete */
-				if (item.nextElementSibling) {
-					if (item.nextElementSibling.classList.contains('item'))
-						item.nextElementSibling.focus();
-					else
-						item.nextElementSibling.firstElementChild.focus();
-				}
-
-				this.removeItem(dl, item);
-				break;
-			}
-		}
-		else if (matchesElem(ev.target, '.cbi-input-text')) {
-			switch (ev.keyCode) {
-			case 13: /* enter */
-				if (ev.target.value.length && !ev.target.classList.contains('cbi-input-invalid')) {
-					this.addItem(dl, ev.target.value, null, true);
-					ev.target.value = '';
-					ev.target.blur();
-					ev.target.focus();
-				}
-
-				ev.preventDefault();
-				break;
-			}
-		}
-	}
-};
-
-function cbi_dynlist_init(dl, datatype, optional, choices)
-{
-	if (!(this instanceof cbi_dynlist_init))
-		return new cbi_dynlist_init(dl, datatype, optional, choices);
-
-	dl.classList.add('cbi-dynlist');
-	dl.appendChild(E('div', { 'class': 'add-item' }, E('input', {
-		'type': 'text',
-		'name': 'cbi.dynlist.' + dl.getAttribute('data-prefix'),
-		'class': 'cbi-input-text',
-		'placeholder': dl.getAttribute('data-placeholder'),
-		'data-type': datatype,
-		'data-optional': true
-	})));
-
-	if (choices)
-		cbi_combobox_init(dl.lastElementChild.lastElementChild, choices, '', _('-- custom --'));
-	else
-		dl.lastElementChild.appendChild(E('div', { 'class': 'cbi-button cbi-button-add' }, '+'));
-
-	dl.addEventListener('click', this.handleClick.bind(this));
-	dl.addEventListener('keydown', this.handleKeydown.bind(this));
-	dl.addEventListener('cbi-dropdown-change', this.handleDropdownChange.bind(this));
-
-	try {
-		var values = JSON.parse(dl.getAttribute('data-values') || '[]');
-
-		if (typeof(values) === 'object' && Array.isArray(values))
-			for (var i = 0; i < values.length; i++)
-				this.addItem(dl, values[i], choices ? choices[values[i]] : null);
-	}
-	catch (e) {}
-}
-
-cbi_dynlist_init.prototype = CBIDynamicList;
-
-
 function cbi_validate_form(form, errmsg)
 {
 	/* if triggered by a section removal or addition, don't validate */
@@ -1445,620 +1258,11 @@ if (typeof(window.CustomEvent) !== 'function') {
 	window.CustomEvent = CustomEvent;
 }
 
-CBIDropdown = {
-	openDropdown: function(sb) {
-		var st = window.getComputedStyle(sb, null),
-		    ul = sb.querySelector('ul'),
-		    li = ul.querySelectorAll('li'),
-		    fl = findParent(sb, '.cbi-value-field'),
-		    sel = ul.querySelector('[selected]'),
-		    rect = sb.getBoundingClientRect(),
-		    items = Math.min(this.dropdown_items, li.length);
-
-		document.querySelectorAll('.cbi-dropdown[open]').forEach(function(s) {
-			s.dispatchEvent(new CustomEvent('cbi-dropdown-close', {}));
-		});
-
-		sb.setAttribute('open', '');
-
-		var pv = ul.cloneNode(true);
-		    pv.classList.add('preview');
-
-		if (fl)
-			fl.classList.add('cbi-dropdown-open');
-
-		if ('ontouchstart' in window) {
-			var vpWidth = Math.max(document.documentElement.clientWidth, window.innerWidth || 0),
-			    vpHeight = Math.max(document.documentElement.clientHeight, window.innerHeight || 0),
-			    scrollFrom = window.pageYOffset,
-			    scrollTo = scrollFrom + rect.top - vpHeight * 0.5,
-			    start = null;
-
-			ul.style.top = sb.offsetHeight + 'px';
-			ul.style.left = -rect.left + 'px';
-			ul.style.right = (rect.right - vpWidth) + 'px';
-			ul.style.maxHeight = (vpHeight * 0.5) + 'px';
-			ul.style.WebkitOverflowScrolling = 'touch';
-
-			var scrollStep = function(timestamp) {
-				if (!start) {
-					start = timestamp;
-					ul.scrollTop = sel ? Math.max(sel.offsetTop - sel.offsetHeight, 0) : 0;
-				}
-
-				var duration = Math.max(timestamp - start, 1);
-				if (duration < 100) {
-					document.body.scrollTop = scrollFrom + (scrollTo - scrollFrom) * (duration / 100);
-					window.requestAnimationFrame(scrollStep);
-				}
-				else {
-					document.body.scrollTop = scrollTo;
-				}
-			};
-
-			window.requestAnimationFrame(scrollStep);
-		}
-		else {
-			ul.style.maxHeight = '1px';
-			ul.style.top = ul.style.bottom = '';
-
-			window.requestAnimationFrame(function() {
-				var height = items * li[Math.max(0, li.length - 2)].offsetHeight;
-
-				ul.scrollTop = sel ? Math.max(sel.offsetTop - sel.offsetHeight, 0) : 0;
-				ul.style[((rect.top + rect.height + height) > window.innerHeight) ? 'bottom' : 'top'] = rect.height + 'px';
-				ul.style.maxHeight = height + 'px';
-			});
-		}
-
-		ul.querySelectorAll('[selected] input[type="checkbox"]').forEach(function(c) {
-			c.checked = true;
-		});
-
-		ul.classList.add('dropdown');
-
-		sb.insertBefore(pv, ul.nextElementSibling);
-
-		li.forEach(function(l) {
-			l.setAttribute('tabindex', 0);
-		});
-
-		sb.lastElementChild.setAttribute('tabindex', 0);
-
-		this.setFocus(sb, sel || li[0], true);
-	},
-
-	closeDropdown: function(sb, no_focus) {
-		if (!sb.hasAttribute('open'))
-			return;
-
-		var pv = sb.querySelector('ul.preview'),
-		    ul = sb.querySelector('ul.dropdown'),
-		    li = ul.querySelectorAll('li'),
-		    fl = findParent(sb, '.cbi-value-field');
-
-		li.forEach(function(l) { l.removeAttribute('tabindex'); });
-		sb.lastElementChild.removeAttribute('tabindex');
-
-		sb.removeChild(pv);
-		sb.removeAttribute('open');
-		sb.style.width = sb.style.height = '';
-
-		ul.classList.remove('dropdown');
-		ul.style.top = ul.style.bottom = ul.style.maxHeight = '';
-
-		if (fl)
-			fl.classList.remove('cbi-dropdown-open');
-
-		if (!no_focus)
-			this.setFocus(sb, sb);
-
-		this.saveValues(sb, ul);
-	},
-
-	toggleItem: function(sb, li, force_state) {
-		if (li.hasAttribute('unselectable'))
-			return;
-
-		if (this.multi) {
-			var cbox = li.querySelector('input[type="checkbox"]'),
-			    items = li.parentNode.querySelectorAll('li'),
-			    label = sb.querySelector('ul.preview'),
-			    sel = li.parentNode.querySelectorAll('[selected]').length,
-			    more = sb.querySelector('.more'),
-			    ndisplay = this.display_items,
-			    n = 0;
-
-			if (li.hasAttribute('selected')) {
-				if (force_state !== true) {
-					if (sel > 1 || this.optional) {
-						li.removeAttribute('selected');
-						cbox.checked = cbox.disabled = false;
-						sel--;
-					}
-					else {
-						cbox.disabled = true;
-					}
-				}
-			}
-			else {
-				if (force_state !== false) {
-					li.setAttribute('selected', '');
-					cbox.checked = true;
-					cbox.disabled = false;
-					sel++;
-				}
-			}
-
-			while (label.firstElementChild)
-				label.removeChild(label.firstElementChild);
-
-			for (var i = 0; i < items.length; i++) {
-				items[i].removeAttribute('display');
-				if (items[i].hasAttribute('selected')) {
-					if (ndisplay-- > 0) {
-						items[i].setAttribute('display', n++);
-						label.appendChild(items[i].cloneNode(true));
-					}
-					var c = items[i].querySelector('input[type="checkbox"]');
-					if (c)
-						c.disabled = (sel == 1 && !this.optional);
-				}
-			}
-
-			if (ndisplay < 0)
-				sb.setAttribute('more', '');
-			else
-				sb.removeAttribute('more');
-
-			if (ndisplay === this.display_items)
-				sb.setAttribute('empty', '');
-			else
-				sb.removeAttribute('empty');
-
-			more.innerHTML = (ndisplay === this.display_items) ? this.placeholder : '···';
-		}
-		else {
-			var sel = li.parentNode.querySelector('[selected]');
-			if (sel) {
-				sel.removeAttribute('display');
-				sel.removeAttribute('selected');
-			}
-
-			li.setAttribute('display', 0);
-			li.setAttribute('selected', '');
-
-			this.closeDropdown(sb, true);
-		}
-
-		this.saveValues(sb, li.parentNode);
-	},
-
-	transformItem: function(sb, li) {
-		var cbox = E('form', {}, E('input', { type: 'checkbox', tabindex: -1, onclick: 'event.preventDefault()' })),
-		    label = E('label');
-
-		while (li.firstChild)
-			label.appendChild(li.firstChild);
-
-		li.appendChild(cbox);
-		li.appendChild(label);
-	},
-
-	saveValues: function(sb, ul) {
-		var sel = ul.querySelectorAll('li[selected]'),
-		    div = sb.lastElementChild,
-		    strval = '',
-		    values = [];
-
-		while (div.lastElementChild)
-			div.removeChild(div.lastElementChild);
-
-		sel.forEach(function (s) {
-			if (s.hasAttribute('placeholder'))
-				return;
-
-			var v = {
-				text: s.innerText,
-				value: s.hasAttribute('data-value') ? s.getAttribute('data-value') : s.innerText,
-				element: s
-			};
-
-			div.appendChild(E('input', {
-				type: 'hidden',
-				name: s.hasAttribute('name') ? s.getAttribute('name') : (sb.getAttribute('name') || ''),
-				value: v.value
-			}));
-
-			values.push(v);
-
-			strval += strval.length ? ' ' + v.value : v.value;
-		});
-
-		var detail = {
-			instance: this,
-			element: sb
-		};
-
-		if (this.multi)
-			detail.values = values;
-		else
-			detail.value = values.length ? values[0] : null;
-
-		sb.value = strval;
-
-		sb.dispatchEvent(new CustomEvent('cbi-dropdown-change', {
-			bubbles: true,
-			detail: detail
-		}));
-	},
-
-	setValues: function(sb, values) {
-		var ul = sb.querySelector('ul');
-
-		if (this.multi) {
-			ul.querySelectorAll('li[data-value]').forEach(function(li) {
-				if (values === null || !(li.getAttribute('data-value') in values))
-					this.toggleItem(sb, li, false);
-				else
-					this.toggleItem(sb, li, true);
-			});
-		}
-		else {
-			var ph = ul.querySelector('li[placeholder]');
-			if (ph)
-				this.toggleItem(sb, ph);
-
-			ul.querySelectorAll('li[data-value]').forEach(function(li) {
-				if (values !== null && (li.getAttribute('data-value') in values))
-					this.toggleItem(sb, li);
-			});
-		}
-	},
-
-	setFocus: function(sb, elem, scroll) {
-		if (sb && sb.hasAttribute && sb.hasAttribute('locked-in'))
-			return;
-
-		if (sb.target && findParent(sb.target, 'ul.dropdown'))
-			return;
-
-		document.querySelectorAll('.focus').forEach(function(e) {
-			if (!matchesElem(e, 'input')) {
-				e.classList.remove('focus');
-				e.blur();
-			}
-		});
-
-		if (elem) {
-			elem.focus();
-			elem.classList.add('focus');
-
-			if (scroll)
-				elem.parentNode.scrollTop = elem.offsetTop - elem.parentNode.offsetTop;
-		}
-	},
-
-	createItems: function(sb, value) {
-		var sbox = this,
-		    val = (value || '').trim(),
-		    ul = sb.querySelector('ul');
-
-		if (!sbox.multi)
-			val = val.length ? [ val ] : [];
-		else
-			val = val.length ? val.split(/\s+/) : [];
-
-		val.forEach(function(item) {
-			var new_item = null;
-
-			ul.childNodes.forEach(function(li) {
-				if (li.getAttribute && li.getAttribute('data-value') === item)
-					new_item = li;
-			});
-
-			if (!new_item) {
-				var markup,
-				    tpl = sb.querySelector(sbox.template);
-
-				if (tpl)
-					markup = (tpl.textContent || tpl.innerHTML || tpl.firstChild.data).replace(/^<!--|-->$/, '').trim();
-				else
-					markup = '<li data-value="{{value}}">{{value}}</li>';
-
-				new_item = E(markup.replace(/{{value}}/g, item));
-
-				if (sbox.multi) {
-					sbox.transformItem(sb, new_item);
-				}
-				else {
-					var old = ul.querySelector('li[created]');
-					if (old)
-						ul.removeChild(old);
-
-					new_item.setAttribute('created', '');
-				}
-
-				new_item = ul.insertBefore(new_item, ul.lastElementChild);
-			}
-
-			sbox.toggleItem(sb, new_item, true);
-			sbox.setFocus(sb, new_item, true);
-		});
-	},
-
-	closeAllDropdowns: function() {
-		document.querySelectorAll('.cbi-dropdown[open]').forEach(function(s) {
-			s.dispatchEvent(new CustomEvent('cbi-dropdown-close', {}));
-		});
-	},
-
-	handleClick: function(ev) {
-		var sb = ev.currentTarget;
-
-		if (!sb.hasAttribute('open')) {
-			if (!matchesElem(ev.target, 'input'))
-				this.openDropdown(sb);
-		}
-		else {
-			var li = findParent(ev.target, 'li');
-			if (li && li.parentNode.classList.contains('dropdown'))
-				this.toggleItem(sb, li);
-			else if (li && li.parentNode.classList.contains('preview'))
-				this.closeDropdown(sb);
-		}
-
-		ev.preventDefault();
-		ev.stopPropagation();
-	},
-
-	handleKeydown: function(ev) {
-		var sb = ev.currentTarget;
-
-		if (matchesElem(ev.target, 'input'))
-			return;
-
-		if (!sb.hasAttribute('open')) {
-			switch (ev.keyCode) {
-			case 37:
-			case 38:
-			case 39:
-			case 40:
-				this.openDropdown(sb);
-				ev.preventDefault();
-			}
-		}
-		else {
-			var active = findParent(document.activeElement, 'li');
-
-			switch (ev.keyCode) {
-			case 27:
-				this.closeDropdown(sb);
-				break;
-
-			case 13:
-				if (active) {
-					if (!active.hasAttribute('selected'))
-						this.toggleItem(sb, active);
-					this.closeDropdown(sb);
-					ev.preventDefault();
-				}
-				break;
-
-			case 32:
-				if (active) {
-					this.toggleItem(sb, active);
-					ev.preventDefault();
-				}
-				break;
-
-			case 38:
-				if (active && active.previousElementSibling) {
-					this.setFocus(sb, active.previousElementSibling);
-					ev.preventDefault();
-				}
-				break;
-
-			case 40:
-				if (active && active.nextElementSibling) {
-					this.setFocus(sb, active.nextElementSibling);
-					ev.preventDefault();
-				}
-				break;
-			}
-		}
-	},
-
-	handleDropdownClose: function(ev) {
-		var sb = ev.currentTarget;
-
-		this.closeDropdown(sb, true);
-	},
-
-	handleDropdownSelect: function(ev) {
-		var sb = ev.currentTarget,
-		    li = findParent(ev.target, 'li');
-
-		if (!li)
-			return;
-
-		this.toggleItem(sb, li);
-		this.closeDropdown(sb, true);
-	},
-
-	handleMouseover: function(ev) {
-		var sb = ev.currentTarget;
-
-		if (!sb.hasAttribute('open'))
-			return;
-
-		var li = findParent(ev.target, 'li');
-
-		if (li && li.parentNode.classList.contains('dropdown'))
-			this.setFocus(sb, li);
-	},
-
-	handleFocus: function(ev) {
-		var sb = ev.currentTarget;
-
-		document.querySelectorAll('.cbi-dropdown[open]').forEach(function(s) {
-			if (s !== sb || sb.hasAttribute('open'))
-				s.dispatchEvent(new CustomEvent('cbi-dropdown-close', {}));
-		});
-	},
-
-	handleCanaryFocus: function(ev) {
-		this.closeDropdown(ev.currentTarget.parentNode);
-	},
-
-	handleCreateKeydown: function(ev) {
-		var input = ev.currentTarget,
-		    sb = findParent(input, '.cbi-dropdown');
-
-		switch (ev.keyCode) {
-		case 13:
-			ev.preventDefault();
-
-			if (input.classList.contains('cbi-input-invalid'))
-				return;
-
-			this.createItems(sb, input.value);
-			input.value = '';
-			input.blur();
-			break;
-		}
-	},
-
-	handleCreateFocus: function(ev) {
-		var input = ev.currentTarget,
-		    cbox = findParent(input, 'li').querySelector('input[type="checkbox"]'),
-		    sb = findParent(input, '.cbi-dropdown');
-
-		if (cbox)
-			cbox.checked = true;
-
-		sb.setAttribute('locked-in', '');
-	},
-
-	handleCreateBlur: function(ev) {
-		var input = ev.currentTarget,
-		    cbox = findParent(input, 'li').querySelector('input[type="checkbox"]'),
-		    sb = findParent(input, '.cbi-dropdown');
-
-		if (cbox)
-			cbox.checked = false;
-
-		sb.removeAttribute('locked-in');
-	},
-
-	handleCreateClick: function(ev) {
-		ev.currentTarget.querySelector(this.create).focus();
-	}
-};
-
 function cbi_dropdown_init(sb) {
-	if (!(this instanceof cbi_dropdown_init))
-		return new cbi_dropdown_init(sb);
-
-	this.multi = sb.hasAttribute('multiple');
-	this.optional = sb.hasAttribute('optional');
-	this.placeholder = sb.getAttribute('placeholder') || '---';
-	this.display_items = parseInt(sb.getAttribute('display-items') || 3);
-	this.dropdown_items = parseInt(sb.getAttribute('dropdown-items') || 5);
-	this.create = sb.getAttribute('item-create') || '.create-item-input';
-	this.template = sb.getAttribute('item-template') || 'script[type="item-template"]';
-
-	var ul = sb.querySelector('ul'),
-	    more = sb.appendChild(E('span', { class: 'more', tabindex: -1 }, '···')),
-	    open = sb.appendChild(E('span', { class: 'open', tabindex: -1 }, '▾')),
-	    canary = sb.appendChild(E('div')),
-	    create = sb.querySelector(this.create),
-	    ndisplay = this.display_items,
-	    n = 0;
-
-	if (this.multi) {
-		var items = ul.querySelectorAll('li');
-
-		for (var i = 0; i < items.length; i++) {
-			this.transformItem(sb, items[i]);
-
-			if (items[i].hasAttribute('selected') && ndisplay-- > 0)
-				items[i].setAttribute('display', n++);
-		}
-	}
-	else {
-		if (this.optional && !ul.querySelector('li[data-value=""]')) {
-			var placeholder = E('li', { placeholder: '' }, this.placeholder);
-			ul.firstChild ? ul.insertBefore(placeholder, ul.firstChild) : ul.appendChild(placeholder);
-		}
-
-		var items = ul.querySelectorAll('li'),
-		    sel = sb.querySelectorAll('[selected]');
-
-		sel.forEach(function(s) {
-			s.removeAttribute('selected');
-		});
-
-		var s = sel[0] || items[0];
-		if (s) {
-			s.setAttribute('selected', '');
-			s.setAttribute('display', n++);
-		}
-
-		ndisplay--;
-	}
-
-	this.saveValues(sb, ul);
-
-	ul.setAttribute('tabindex', -1);
-	sb.setAttribute('tabindex', 0);
-
-	if (ndisplay < 0)
-		sb.setAttribute('more', '')
-	else
-		sb.removeAttribute('more');
-
-	if (ndisplay === this.display_items)
-		sb.setAttribute('empty', '')
-	else
-		sb.removeAttribute('empty');
-
-	more.innerHTML = (ndisplay === this.display_items) ? this.placeholder : '···';
-
-
-	sb.addEventListener('click', this.handleClick.bind(this));
-	sb.addEventListener('keydown', this.handleKeydown.bind(this));
-	sb.addEventListener('cbi-dropdown-close', this.handleDropdownClose.bind(this));
-	sb.addEventListener('cbi-dropdown-select', this.handleDropdownSelect.bind(this));
-
-	if ('ontouchstart' in window) {
-		sb.addEventListener('touchstart', function(ev) { ev.stopPropagation(); });
-		window.addEventListener('touchstart', this.closeAllDropdowns);
-	}
-	else {
-		sb.addEventListener('mouseover', this.handleMouseover.bind(this));
-		sb.addEventListener('focus', this.handleFocus.bind(this));
-
-		canary.addEventListener('focus', this.handleCanaryFocus.bind(this));
-
-		window.addEventListener('mouseover', this.setFocus);
-		window.addEventListener('click', this.closeAllDropdowns);
-	}
-
-	if (create) {
-		create.addEventListener('keydown', this.handleCreateKeydown.bind(this));
-		create.addEventListener('focus', this.handleCreateFocus.bind(this));
-		create.addEventListener('blur', this.handleCreateBlur.bind(this));
-
-		var li = findParent(create, 'li');
-
-		li.setAttribute('unselectable', '');
-		li.addEventListener('click', this.handleCreateClick.bind(this));
-	}
+	var dl = new L.ui.Dropdown(sb, null, { name: sb.getAttribute('name') });
+	return dl.bind(sb);
 }
 
-cbi_dropdown_init.prototype = CBIDropdown;
-
 function cbi_update_table(table, data, placeholder) {
 	var target = isElem(table) ? table : document.querySelector(table);
 
diff --git a/modules/luci-base/htdocs/luci-static/resources/ui.js b/modules/luci-base/htdocs/luci-static/resources/ui.js
index c69f1cb0a..5914b5ee6 100644
--- a/modules/luci-base/htdocs/luci-static/resources/ui.js
+++ b/modules/luci-base/htdocs/luci-static/resources/ui.js
@@ -1,7 +1,1031 @@
+'use strict';
+
 var modalDiv = null,
     tooltipDiv = null,
     tooltipTimeout = null;
 
+var UIElement = L.Class.extend({
+	getValue: function() {
+		if (L.dom.matches(this.node, 'select') || L.dom.matches(this.node, 'input'))
+			return this.node.value;
+
+		return null;
+	},
+
+	setValue: function(value) {
+		if (L.dom.matches(this.node, 'select') || L.dom.matches(this.node, 'input'))
+			this.node.value = value;
+	},
+
+	isValid: function() {
+		return true;
+	},
+
+	registerEvents: function(targetNode, synevent, events) {
+		var dispatchFn = L.bind(function(ev) {
+			this.node.dispatchEvent(new CustomEvent(synevent, { bubbles: true }));
+		}, this);
+
+		for (var i = 0; i < events.length; i++)
+			targetNode.addEventListener(events[i], dispatchFn);
+	},
+
+	setUpdateEvents: function(targetNode /*, ... */) {
+		this.registerEvents(targetNode, 'widget-update', this.varargs(arguments, 1));
+	},
+
+	setChangeEvents: function(targetNode /*, ... */) {
+		this.registerEvents(targetNode, 'widget-change', this.varargs(arguments, 1));
+	}
+});
+
+var UIDropdown = UIElement.extend({
+	__init__: function(value, choices, options) {
+		if (typeof(choices) != 'object')
+			choices = {};
+
+		if (!Array.isArray(value))
+			this.values = (value != null) ? [ value ] : [];
+		else
+			this.values = value;
+
+		this.choices = choices;
+		this.options = Object.assign({
+			sort:               true,
+			multi:              Array.isArray(value),
+			optional:           true,
+			select_placeholder: _('-- Please choose --'),
+			custom_placeholder: _('-- custom --'),
+			display_items:      3,
+			dropdown_items:     5,
+			create:             false,
+			create_query:       '.create-item-input',
+			create_template:    'script[type="item-template"]'
+		}, options);
+	},
+
+	render: function() {
+		var sb = E('div', {
+			'id': this.options.id,
+			'class': 'cbi-dropdown',
+			'multiple': this.options.multi ? '' : null,
+			'optional': this.options.optional ? '' : null,
+		}, E('ul'));
+
+		var keys = Object.keys(this.choices);
+
+		if (this.options.sort === true)
+			keys.sort();
+		else if (Array.isArray(this.options.sort))
+			keys = this.options.sort;
+
+		if (this.options.create)
+			for (var i = 0; i < this.values.length; i++)
+				if (!this.choices.hasOwnProperty(this.values[i]))
+					keys.push(this.values[i]);
+
+		for (var i = 0; i < keys.length; i++)
+			sb.lastElementChild.appendChild(E('li', {
+				'data-value': keys[i],
+				'selected': (this.values.indexOf(keys[i]) > -1) ? '' : null
+			}, this.choices[keys[i]] || keys[i]));
+
+		if (this.options.create) {
+			var createEl = E('input', {
+				'type': 'text',
+				'class': 'create-item-input',
+				'placeholder': this.options.custom_placeholder || this.options.placeholder
+			});
+
+			if (this.options.datatype)
+				L.ui.addValidator(createEl, this.options.datatype, true, 'blur', 'keyup');
+
+			sb.lastElementChild.appendChild(E('li', { 'data-value': '-' }, createEl));
+		}
+
+		return this.bind(sb);
+	},
+
+	bind: function(sb) {
+		var o = this.options;
+
+		o.multi = sb.hasAttribute('multiple');
+		o.optional = sb.hasAttribute('optional');
+		o.placeholder = sb.getAttribute('placeholder') || o.placeholder;
+		o.display_items = parseInt(sb.getAttribute('display-items') || o.display_items);
+		o.dropdown_items = parseInt(sb.getAttribute('dropdown-items') || o.dropdown_items);
+		o.create_query = sb.getAttribute('item-create') || o.create_query;
+		o.create_template = sb.getAttribute('item-template') || o.create_template;
+
+		var ul = sb.querySelector('ul'),
+		    more = sb.appendChild(E('span', { class: 'more', tabindex: -1 }, '···')),
+		    open = sb.appendChild(E('span', { class: 'open', tabindex: -1 }, '▾')),
+		    canary = sb.appendChild(E('div')),
+		    create = sb.querySelector(this.options.create_query),
+		    ndisplay = this.options.display_items,
+		    n = 0;
+
+		if (this.options.multi) {
+			var items = ul.querySelectorAll('li');
+
+			for (var i = 0; i < items.length; i++) {
+				this.transformItem(sb, items[i]);
+
+				if (items[i].hasAttribute('selected') && ndisplay-- > 0)
+					items[i].setAttribute('display', n++);
+			}
+		}
+		else {
+			if (this.options.optional && !ul.querySelector('li[data-value=""]')) {
+				var placeholder = E('li', { placeholder: '' },
+					this.options.select_placeholder || this.options.placeholder);
+
+				ul.firstChild
+					? ul.insertBefore(placeholder, ul.firstChild)
+					: ul.appendChild(placeholder);
+			}
+
+			var items = ul.querySelectorAll('li'),
+			    sel = sb.querySelectorAll('[selected]');
+
+			sel.forEach(function(s) {
+				s.removeAttribute('selected');
+			});
+
+			var s = sel[0] || items[0];
+			if (s) {
+				s.setAttribute('selected', '');
+				s.setAttribute('display', n++);
+			}
+
+			ndisplay--;
+		}
+
+		this.saveValues(sb, ul);
+
+		ul.setAttribute('tabindex', -1);
+		sb.setAttribute('tabindex', 0);
+
+		if (ndisplay < 0)
+			sb.setAttribute('more', '')
+		else
+			sb.removeAttribute('more');
+
+		if (ndisplay == this.options.display_items)
+			sb.setAttribute('empty', '')
+		else
+			sb.removeAttribute('empty');
+
+		more.innerHTML = (ndisplay == this.options.display_items)
+			? (this.options.select_placeholder || this.options.placeholder) : '···';
+
+
+		sb.addEventListener('click', this.handleClick.bind(this));
+		sb.addEventListener('keydown', this.handleKeydown.bind(this));
+		sb.addEventListener('cbi-dropdown-close', this.handleDropdownClose.bind(this));
+		sb.addEventListener('cbi-dropdown-select', this.handleDropdownSelect.bind(this));
+
+		if ('ontouchstart' in window) {
+			sb.addEventListener('touchstart', function(ev) { ev.stopPropagation(); });
+			window.addEventListener('touchstart', this.closeAllDropdowns);
+		}
+		else {
+			sb.addEventListener('mouseover', this.handleMouseover.bind(this));
+			sb.addEventListener('focus', this.handleFocus.bind(this));
+
+			canary.addEventListener('focus', this.handleCanaryFocus.bind(this));
+
+			window.addEventListener('mouseover', this.setFocus);
+			window.addEventListener('click', this.closeAllDropdowns);
+		}
+
+		if (create) {
+			create.addEventListener('keydown', this.handleCreateKeydown.bind(this));
+			create.addEventListener('focus', this.handleCreateFocus.bind(this));
+			create.addEventListener('blur', this.handleCreateBlur.bind(this));
+
+			var li = findParent(create, 'li');
+
+			li.setAttribute('unselectable', '');
+			li.addEventListener('click', this.handleCreateClick.bind(this));
+		}
+
+		this.node = sb;
+
+		this.setUpdateEvents(sb, 'cbi-dropdown-open', 'cbi-dropdown-close');
+		this.setChangeEvents(sb, 'cbi-dropdown-change', 'cbi-dropdown-close');
+
+		L.dom.bindClassInstance(sb, this);
+
+		return sb;
+	},
+
+	openDropdown: function(sb) {
+		var st = window.getComputedStyle(sb, null),
+		    ul = sb.querySelector('ul'),
+		    li = ul.querySelectorAll('li'),
+		    fl = findParent(sb, '.cbi-value-field'),
+		    sel = ul.querySelector('[selected]'),
+		    rect = sb.getBoundingClientRect(),
+		    items = Math.min(this.options.dropdown_items, li.length);
+
+		document.querySelectorAll('.cbi-dropdown[open]').forEach(function(s) {
+			s.dispatchEvent(new CustomEvent('cbi-dropdown-close', {}));
+		});
+
+		sb.setAttribute('open', '');
+
+		var pv = ul.cloneNode(true);
+		    pv.classList.add('preview');
+
+		if (fl)
+			fl.classList.add('cbi-dropdown-open');
+
+		if ('ontouchstart' in window) {
+			var vpWidth = Math.max(document.documentElement.clientWidth, window.innerWidth || 0),
+			    vpHeight = Math.max(document.documentElement.clientHeight, window.innerHeight || 0),
+			    scrollFrom = window.pageYOffset,
+			    scrollTo = scrollFrom + rect.top - vpHeight * 0.5,
+			    start = null;
+
+			ul.style.top = sb.offsetHeight + 'px';
+			ul.style.left = -rect.left + 'px';
+			ul.style.right = (rect.right - vpWidth) + 'px';
+			ul.style.maxHeight = (vpHeight * 0.5) + 'px';
+			ul.style.WebkitOverflowScrolling = 'touch';
+
+			var scrollStep = function(timestamp) {
+				if (!start) {
+					start = timestamp;
+					ul.scrollTop = sel ? Math.max(sel.offsetTop - sel.offsetHeight, 0) : 0;
+				}
+
+				var duration = Math.max(timestamp - start, 1);
+				if (duration < 100) {
+					document.body.scrollTop = scrollFrom + (scrollTo - scrollFrom) * (duration / 100);
+					window.requestAnimationFrame(scrollStep);
+				}
+				else {
+					document.body.scrollTop = scrollTo;
+				}
+			};
+
+			window.requestAnimationFrame(scrollStep);
+		}
+		else {
+			ul.style.maxHeight = '1px';
+			ul.style.top = ul.style.bottom = '';
+
+			window.requestAnimationFrame(function() {
+				var height = items * li[Math.max(0, li.length - 2)].offsetHeight;
+
+				ul.scrollTop = sel ? Math.max(sel.offsetTop - sel.offsetHeight, 0) : 0;
+				ul.style[((rect.top + rect.height + height) > window.innerHeight) ? 'bottom' : 'top'] = rect.height + 'px';
+				ul.style.maxHeight = height + 'px';
+			});
+		}
+
+		var cboxes = ul.querySelectorAll('[selected] input[type="checkbox"]');
+		for (var i = 0; i < cboxes.length; i++) {
+			cboxes[i].checked = true;
+			cboxes[i].disabled = (cboxes.length == 1 && !this.options.optional);
+		};
+
+		ul.classList.add('dropdown');
+
+		sb.insertBefore(pv, ul.nextElementSibling);
+
+		li.forEach(function(l) {
+			l.setAttribute('tabindex', 0);
+		});
+
+		sb.lastElementChild.setAttribute('tabindex', 0);
+
+		this.setFocus(sb, sel || li[0], true);
+	},
+
+	closeDropdown: function(sb, no_focus) {
+		if (!sb.hasAttribute('open'))
+			return;
+
+		var pv = sb.querySelector('ul.preview'),
+		    ul = sb.querySelector('ul.dropdown'),
+		    li = ul.querySelectorAll('li'),
+		    fl = findParent(sb, '.cbi-value-field');
+
+		li.forEach(function(l) { l.removeAttribute('tabindex'); });
+		sb.lastElementChild.removeAttribute('tabindex');
+
+		sb.removeChild(pv);
+		sb.removeAttribute('open');
+		sb.style.width = sb.style.height = '';
+
+		ul.classList.remove('dropdown');
+		ul.style.top = ul.style.bottom = ul.style.maxHeight = '';
+
+		if (fl)
+			fl.classList.remove('cbi-dropdown-open');
+
+		if (!no_focus)
+			this.setFocus(sb, sb);
+
+		this.saveValues(sb, ul);
+	},
+
+	toggleItem: function(sb, li, force_state) {
+		if (li.hasAttribute('unselectable'))
+			return;
+
+		if (this.options.multi) {
+			var cbox = li.querySelector('input[type="checkbox"]'),
+			    items = li.parentNode.querySelectorAll('li'),
+			    label = sb.querySelector('ul.preview'),
+			    sel = li.parentNode.querySelectorAll('[selected]').length,
+			    more = sb.querySelector('.more'),
+			    ndisplay = this.options.display_items,
+			    n = 0;
+
+			if (li.hasAttribute('selected')) {
+				if (force_state !== true) {
+					if (sel > 1 || this.options.optional) {
+						li.removeAttribute('selected');
+						cbox.checked = cbox.disabled = false;
+						sel--;
+					}
+					else {
+						cbox.disabled = true;
+					}
+				}
+			}
+			else {
+				if (force_state !== false) {
+					li.setAttribute('selected', '');
+					cbox.checked = true;
+					cbox.disabled = false;
+					sel++;
+				}
+			}
+
+			while (label && label.firstElementChild)
+				label.removeChild(label.firstElementChild);
+
+			for (var i = 0; i < items.length; i++) {
+				items[i].removeAttribute('display');
+				if (items[i].hasAttribute('selected')) {
+					if (ndisplay-- > 0) {
+						items[i].setAttribute('display', n++);
+						if (label)
+							label.appendChild(items[i].cloneNode(true));
+					}
+					var c = items[i].querySelector('input[type="checkbox"]');
+					if (c)
+						c.disabled = (sel == 1 && !this.options.optional);
+				}
+			}
+
+			if (ndisplay < 0)
+				sb.setAttribute('more', '');
+			else
+				sb.removeAttribute('more');
+
+			if (ndisplay === this.options.display_items)
+				sb.setAttribute('empty', '');
+			else
+				sb.removeAttribute('empty');
+
+			more.innerHTML = (ndisplay === this.options.display_items)
+				? (this.options.select_placeholder || this.options.placeholder) : '···';
+		}
+		else {
+			var sel = li.parentNode.querySelector('[selected]');
+			if (sel) {
+				sel.removeAttribute('display');
+				sel.removeAttribute('selected');
+			}
+
+			li.setAttribute('display', 0);
+			li.setAttribute('selected', '');
+
+			this.closeDropdown(sb, true);
+		}
+
+		this.saveValues(sb, li.parentNode);
+	},
+
+	transformItem: function(sb, li) {
+		var cbox = E('form', {}, E('input', { type: 'checkbox', tabindex: -1, onclick: 'event.preventDefault()' })),
+		    label = E('label');
+
+		while (li.firstChild)
+			label.appendChild(li.firstChild);
+
+		li.appendChild(cbox);
+		li.appendChild(label);
+	},
+
+	saveValues: function(sb, ul) {
+		var sel = ul.querySelectorAll('li[selected]'),
+		    div = sb.lastElementChild,
+		    name = this.options.name,
+		    strval = '',
+		    values = [];
+
+		while (div.lastElementChild)
+			div.removeChild(div.lastElementChild);
+
+		sel.forEach(function (s) {
+			if (s.hasAttribute('placeholder'))
+				return;
+
+			var v = {
+				text: s.innerText,
+				value: s.hasAttribute('data-value') ? s.getAttribute('data-value') : s.innerText,
+				element: s
+			};
+
+			div.appendChild(E('input', {
+				type: 'hidden',
+				name: name,
+				value: v.value
+			}));
+
+			values.push(v);
+
+			strval += strval.length ? ' ' + v.value : v.value;
+		});
+
+		var detail = {
+			instance: this,
+			element: sb
+		};
+
+		if (this.options.multi)
+			detail.values = values;
+		else
+			detail.value = values.length ? values[0] : null;
+
+		sb.value = strval;
+
+		sb.dispatchEvent(new CustomEvent('cbi-dropdown-change', {
+			bubbles: true,
+			detail: detail
+		}));
+	},
+
+	setValues: function(sb, values) {
+		var ul = sb.querySelector('ul');
+
+		if (this.options.create) {
+			for (var value in values) {
+				this.createItems(sb, value);
+
+				if (!this.options.multi)
+					break;
+			}
+		}
+
+		if (this.options.multi) {
+			var lis = ul.querySelectorAll('li[data-value]');
+			for (var i = 0; i < lis.length; i++) {
+				var value = lis[i].getAttribute('data-value');
+				if (values === null || !(value in values))
+					this.toggleItem(sb, lis[i], false);
+				else
+					this.toggleItem(sb, lis[i], true);
+			}
+		}
+		else {
+			var ph = ul.querySelector('li[placeholder]');
+			if (ph)
+				this.toggleItem(sb, ph);
+
+			var lis = ul.querySelectorAll('li[data-value]');
+			for (var i = 0; i < lis.length; i++) {
+				var value = lis[i].getAttribute('data-value');
+				if (values !== null && (value in values))
+					this.toggleItem(sb, lis[i]);
+			}
+		}
+	},
+
+	setFocus: function(sb, elem, scroll) {
+		if (sb && sb.hasAttribute && sb.hasAttribute('locked-in'))
+			return;
+
+		if (sb.target && findParent(sb.target, 'ul.dropdown'))
+			return;
+
+		document.querySelectorAll('.focus').forEach(function(e) {
+			if (!matchesElem(e, 'input')) {
+				e.classList.remove('focus');
+				e.blur();
+			}
+		});
+
+		if (elem) {
+			elem.focus();
+			elem.classList.add('focus');
+
+			if (scroll)
+				elem.parentNode.scrollTop = elem.offsetTop - elem.parentNode.offsetTop;
+		}
+	},
+
+	createItems: function(sb, value) {
+		var sbox = this,
+		    val = (value || '').trim(),
+		    ul = sb.querySelector('ul');
+
+		if (!sbox.options.multi)
+			val = val.length ? [ val ] : [];
+		else
+			val = val.length ? val.split(/\s+/) : [];
+
+		val.forEach(function(item) {
+			var new_item = null;
+
+			ul.childNodes.forEach(function(li) {
+				if (li.getAttribute && li.getAttribute('data-value') === item)
+					new_item = li;
+			});
+
+			if (!new_item) {
+				var markup,
+				    tpl = sb.querySelector(sbox.options.create_template);
+
+				if (tpl)
+					markup = (tpl.textContent || tpl.innerHTML || tpl.firstChild.data).replace(/^<!--|-->$/, '').trim();
+				else
+					markup = '<li data-value="{{value}}">{{value}}</li>';
+
+				new_item = E(markup.replace(/{{value}}/g, item));
+
+				if (sbox.options.multi) {
+					sbox.transformItem(sb, new_item);
+				}
+				else {
+					var old = ul.querySelector('li[created]');
+					if (old)
+						ul.removeChild(old);
+
+					new_item.setAttribute('created', '');
+				}
+
+				new_item = ul.insertBefore(new_item, ul.lastElementChild);
+			}
+
+			sbox.toggleItem(sb, new_item, true);
+			sbox.setFocus(sb, new_item, true);
+		});
+	},
+
+	closeAllDropdowns: function() {
+		document.querySelectorAll('.cbi-dropdown[open]').forEach(function(s) {
+			s.dispatchEvent(new CustomEvent('cbi-dropdown-close', {}));
+		});
+	},
+
+	handleClick: function(ev) {
+		var sb = ev.currentTarget;
+
+		if (!sb.hasAttribute('open')) {
+			if (!matchesElem(ev.target, 'input'))
+				this.openDropdown(sb);
+		}
+		else {
+			var li = findParent(ev.target, 'li');
+			if (li && li.parentNode.classList.contains('dropdown'))
+				this.toggleItem(sb, li);
+			else if (li && li.parentNode.classList.contains('preview'))
+				this.closeDropdown(sb);
+		}
+
+		ev.preventDefault();
+		ev.stopPropagation();
+	},
+
+	handleKeydown: function(ev) {
+		var sb = ev.currentTarget;
+
+		if (matchesElem(ev.target, 'input'))
+			return;
+
+		if (!sb.hasAttribute('open')) {
+			switch (ev.keyCode) {
+			case 37:
+			case 38:
+			case 39:
+			case 40:
+				this.openDropdown(sb);
+				ev.preventDefault();
+			}
+		}
+		else {
+			var active = findParent(document.activeElement, 'li');
+
+			switch (ev.keyCode) {
+			case 27:
+				this.closeDropdown(sb);
+				break;
+
+			case 13:
+				if (active) {
+					if (!active.hasAttribute('selected'))
+						this.toggleItem(sb, active);
+					this.closeDropdown(sb);
+					ev.preventDefault();
+				}
+				break;
+
+			case 32:
+				if (active) {
+					this.toggleItem(sb, active);
+					ev.preventDefault();
+				}
+				break;
+
+			case 38:
+				if (active && active.previousElementSibling) {
+					this.setFocus(sb, active.previousElementSibling);
+					ev.preventDefault();
+				}
+				break;
+
+			case 40:
+				if (active && active.nextElementSibling) {
+					this.setFocus(sb, active.nextElementSibling);
+					ev.preventDefault();
+				}
+				break;
+			}
+		}
+	},
+
+	handleDropdownClose: function(ev) {
+		var sb = ev.currentTarget;
+
+		this.closeDropdown(sb, true);
+	},
+
+	handleDropdownSelect: function(ev) {
+		var sb = ev.currentTarget,
+		    li = findParent(ev.target, 'li');
+
+		if (!li)
+			return;
+
+		this.toggleItem(sb, li);
+		this.closeDropdown(sb, true);
+	},
+
+	handleMouseover: function(ev) {
+		var sb = ev.currentTarget;
+
+		if (!sb.hasAttribute('open'))
+			return;
+
+		var li = findParent(ev.target, 'li');
+
+		if (li && li.parentNode.classList.contains('dropdown'))
+			this.setFocus(sb, li);
+	},
+
+	handleFocus: function(ev) {
+		var sb = ev.currentTarget;
+
+		document.querySelectorAll('.cbi-dropdown[open]').forEach(function(s) {
+			if (s !== sb || sb.hasAttribute('open'))
+				s.dispatchEvent(new CustomEvent('cbi-dropdown-close', {}));
+		});
+	},
+
+	handleCanaryFocus: function(ev) {
+		this.closeDropdown(ev.currentTarget.parentNode);
+	},
+
+	handleCreateKeydown: function(ev) {
+		var input = ev.currentTarget,
+		    sb = findParent(input, '.cbi-dropdown');
+
+		switch (ev.keyCode) {
+		case 13:
+			ev.preventDefault();
+
+			if (input.classList.contains('cbi-input-invalid'))
+				return;
+
+			this.createItems(sb, input.value);
+			input.value = '';
+			input.blur();
+			break;
+		}
+	},
+
+	handleCreateFocus: function(ev) {
+		var input = ev.currentTarget,
+		    cbox = findParent(input, 'li').querySelector('input[type="checkbox"]'),
+		    sb = findParent(input, '.cbi-dropdown');
+
+		if (cbox)
+			cbox.checked = true;
+
+		sb.setAttribute('locked-in', '');
+	},
+
+	handleCreateBlur: function(ev) {
+		var input = ev.currentTarget,
+		    cbox = findParent(input, 'li').querySelector('input[type="checkbox"]'),
+		    sb = findParent(input, '.cbi-dropdown');
+
+		if (cbox)
+			cbox.checked = false;
+
+		sb.removeAttribute('locked-in');
+	},
+
+	handleCreateClick: function(ev) {
+		ev.currentTarget.querySelector(this.options.create_query).focus();
+	},
+
+	setValue: function(values) {
+		if (this.options.multi) {
+			if (!Array.isArray(values))
+				values = (values != null) ? [ values ] : [];
+
+			var v = {};
+
+			for (var i = 0; i < values.length; i++)
+				v[values[i]] = true;
+
+			this.setValues(this.node, v);
+		}
+		else {
+			var v = {};
+
+			if (values != null) {
+				if (Array.isArray(values))
+					v[values[0]] = true;
+				else
+					v[values] = true;
+			}
+
+			this.setValues(this.node, v);
+		}
+	},
+
+	getValue: function() {
+		var div = this.node.lastElementChild,
+		    h = div.querySelectorAll('input[type="hidden"]'),
+			v = [];
+
+		for (var i = 0; i < h.length; i++)
+			v.push(h[i].value);
+
+		return this.options.multi ? v : v[0];
+	}
+});
+
+var UICombobox = UIDropdown.extend({
+	__init__: function(value, choices, options) {
+		this.super('__init__', [ value, choices, Object.assign({
+			select_placeholder: _('-- Please choose --'),
+			custom_placeholder: _('-- custom --'),
+			dropdown_items: 5
+		}, options, {
+			sort: true,
+			multi: false,
+			create: true,
+			optional: true
+		}) ]);
+	}
+});
+
+var UIDynamicList = UIElement.extend({
+	__init__: function(values, choices, options) {
+		if (!Array.isArray(values))
+			values = (values != null) ? [ values ] : [];
+
+		if (typeof(choices) != 'object')
+			choices = null;
+
+		this.values = values;
+		this.choices = choices;
+		this.options = Object.assign({}, options, {
+			multi: false,
+			optional: true
+		});
+	},
+
+	render: function() {
+		var dl = E('div', {
+			'id': this.options.id,
+			'class': 'cbi-dynlist'
+		}, E('div', { 'class': 'add-item' }));
+
+		if (this.choices) {
+			var cbox = new UICombobox(null, this.choices, this.options);
+			dl.lastElementChild.appendChild(cbox.render());
+		}
+		else {
+			var inputEl = E('input', {
+				'type': 'text',
+				'class': 'cbi-input-text',
+				'placeholder': this.options.placeholder
+			});
+
+			dl.lastElementChild.appendChild(inputEl);
+			dl.lastElementChild.appendChild(E('div', { 'class': 'cbi-button cbi-button-add' }, '+'));
+
+			L.ui.addValidator(inputEl, this.options.datatype, true, 'blue', 'keyup');
+		}
+
+		for (var i = 0; i < this.values.length; i++)
+			this.addItem(dl, this.values[i],
+				this.choices ? this.choices[this.values[i]] : null);
+
+		return this.bind(dl);
+	},
+
+	bind: function(dl) {
+		dl.addEventListener('click', L.bind(this.handleClick, this));
+		dl.addEventListener('keydown', L.bind(this.handleKeydown, this));
+		dl.addEventListener('cbi-dropdown-change', L.bind(this.handleDropdownChange, this));
+
+		this.node = dl;
+
+		this.setUpdateEvents(dl, 'cbi-dynlist-change');
+		this.setChangeEvents(dl, 'cbi-dynlist-change');
+
+		L.dom.bindClassInstance(dl, this);
+
+		return dl;
+	},
+
+	addItem: function(dl, value, text, flash) {
+		var exists = false,
+		    new_item = E('div', { 'class': flash ? 'item flash' : 'item', 'tabindex': 0 }, [
+				E('span', {}, text || value),
+				E('input', {
+					'type': 'hidden',
+					'name': this.options.name,
+					'value': value })]);
+
+		dl.querySelectorAll('.item, .add-item').forEach(function(item) {
+			if (exists)
+				return;
+
+			var hidden = item.querySelector('input[type="hidden"]');
+
+			if (hidden && hidden.parentNode !== item)
+				hidden = null;
+
+			if (hidden && hidden.value === value)
+				exists = true;
+			else if (!hidden || hidden.value >= value)
+				exists = !!item.parentNode.insertBefore(new_item, item);
+		});
+
+		dl.dispatchEvent(new CustomEvent('cbi-dynlist-change', {
+			bubbles: true,
+			detail: {
+				instance: this,
+				element: dl,
+				value: value,
+				add: true
+			}
+		}));
+	},
+
+	removeItem: function(dl, item) {
+		var value = item.querySelector('input[type="hidden"]').value;
+		var sb = dl.querySelector('.cbi-dropdown');
+		if (sb)
+			sb.querySelectorAll('ul > li').forEach(function(li) {
+				if (li.getAttribute('data-value') === value) {
+					if (li.hasAttribute('dynlistcustom'))
+						li.parentNode.removeChild(li);
+					else
+						li.removeAttribute('unselectable');
+				}
+			});
+
+		item.parentNode.removeChild(item);
+
+		dl.dispatchEvent(new CustomEvent('cbi-dynlist-change', {
+			bubbles: true,
+			detail: {
+				instance: this,
+				element: dl,
+				value: value,
+				remove: true
+			}
+		}));
+	},
+
+	handleClick: function(ev) {
+		var dl = ev.currentTarget,
+		    item = findParent(ev.target, '.item');
+
+		if (item) {
+			this.removeItem(dl, item);
+		}
+		else if (matchesElem(ev.target, '.cbi-button-add')) {
+			var input = ev.target.previousElementSibling;
+			if (input.value.length && !input.classList.contains('cbi-input-invalid')) {
+				this.addItem(dl, input.value, null, true);
+				input.value = '';
+			}
+		}
+	},
+
+	handleDropdownChange: function(ev) {
+		var dl = ev.currentTarget,
+		    sbIn = ev.detail.instance,
+		    sbEl = ev.detail.element,
+		    sbVal = ev.detail.value;
+
+		if (sbVal === null)
+			return;
+
+		sbIn.setValues(sbEl, null);
+		sbVal.element.setAttribute('unselectable', '');
+
+		if (sbVal.element.hasAttribute('created')) {
+			sbVal.element.removeAttribute('created');
+			sbVal.element.setAttribute('dynlistcustom', '');
+		}
+
+		this.addItem(dl, sbVal.value, sbVal.text, true);
+	},
+
+	handleKeydown: function(ev) {
+		var dl = ev.currentTarget,
+		    item = findParent(ev.target, '.item');
+
+		if (item) {
+			switch (ev.keyCode) {
+			case 8: /* backspace */
+				if (item.previousElementSibling)
+					item.previousElementSibling.focus();
+
+				this.removeItem(dl, item);
+				break;
+
+			case 46: /* delete */
+				if (item.nextElementSibling) {
+					if (item.nextElementSibling.classList.contains('item'))
+						item.nextElementSibling.focus();
+					else
+						item.nextElementSibling.firstElementChild.focus();
+				}
+
+				this.removeItem(dl, item);
+				break;
+			}
+		}
+		else if (matchesElem(ev.target, '.cbi-input-text')) {
+			switch (ev.keyCode) {
+			case 13: /* enter */
+				if (ev.target.value.length && !ev.target.classList.contains('cbi-input-invalid')) {
+					this.addItem(dl, ev.target.value, null, true);
+					ev.target.value = '';
+					ev.target.blur();
+					ev.target.focus();
+				}
+
+				ev.preventDefault();
+				break;
+			}
+		}
+	},
+
+	getValue: function() {
+		var items = this.node.querySelectorAll('.item > input[type="hidden"]'),
+		    v = [];
+
+		for (var i = 0; i < items.length; i++)
+			v.push(items[i].value);
+
+		return v;
+	},
+
+	setValue: function(values) {
+		if (!Array.isArray(values))
+			values = (values != null) ? [ values ] : [];
+
+		var items = this.node.querySelectorAll('.item');
+
+		for (var i = 0; i < items.length; i++)
+			if (items[i].parentNode === this.node)
+				this.removeItem(this.node, items[i]);
+
+		for (var i = 0; i < values.length; i++)
+			this.addItem(this.node, values[i],
+				this.choices ? this.choices[values[i]] : null);
+	}
+});
+
+
 return L.Class.extend({
 	__init__: function() {
 		modalDiv = document.body.appendChild(
@@ -292,5 +1316,30 @@ return L.Class.extend({
 				}
 			});
 		}
-	})
+	}),
+
+	addValidator: function(field, type, optional /*, ... */) {
+		if (type == null)
+			return;
+
+		var events = this.varargs(arguments, 3);
+		if (events.length == 0)
+			events.push('blur', 'keyup');
+
+		try {
+			var cbiValidator = new CBIValidator(field, type, optional),
+			    validatorFn = cbiValidator.validate.bind(cbiValidator);
+
+			for (var i = 0; i < events.length; i++)
+				field.addEventListener(events[i], validatorFn);
+
+			validatorFn();
+		}
+		catch (e) { }
+	},
+
+	/* Widgets */
+	Dropdown: UIDropdown,
+	DynamicList: UIDynamicList,
+	Combobox: UICombobox
 });