CheckboxList: compact transmission mode in form name=val1,val2,val3

src/Forms/Controls/CheckboxList.php

@@ -46,6 +46,21 @@ public function __construct($label = null, array $items = null)
 	}
 
 
+	public function loadHttpData(): void
+	{
+		$data = $this->getForm()->getHttpData(Nette\Forms\Form::DATA_TEXT, substr($this->getHtmlName(), 0, -2));
+		if ($data === null) {
+			$data = $this->getHttpData(Nette\Forms\Form::DATA_TEXT);
+		} else {
+			$data = explode(',', $data);
+		}
+		$this->value = array_keys(array_flip($data));
+		if (is_array($this->disabled)) {
+			$this->value = array_diff($this->value, array_keys($this->disabled));
+		}
+	}
+
+
 	public function getControl(): Html
 	{
 		$input = parent::getControl();

src/assets/netteForms.js

@@ -88,7 +88,7 @@
 			}
 			return values;
 
-		} else if (elem.name && elem.name.match(/\[\]$/)) { // multiple elements []
+		} else if (elem.name && elem.name.substr(-2) === '[]') { // multiple elements []
 			elements = elem.form.elements[elem.name].tagName ? [elem] : elem.form.elements[elem.name];
 			values = [];
 
@@ -665,16 +665,71 @@
 	};
 
 
+	/**
+	 * Compact checkboxes
+	 */
+	Nette.compactCheckboxes = function(form) {
+		var name, i, elem, values = {};
+
+		for (i = 0; i < form.elements.length; i++) {
+			elem = form.elements[i];
+			if (elem.tagName
+				&& elem.tagName.toLowerCase() === 'input'
+				&& elem.type === 'checkbox'
+			) {
+				if (elem.name
+					&& elem.name.substr(-2) === '[]'
+				) {
+					name = elem.name.substr(0, elem.name.length - 2);
+					elem.removeAttribute('name');
+					elem.setAttribute('data-nette-name', name);
+				}
+
+				if (name = elem.getAttribute('data-nette-name')) { // eslint-disable-line no-cond-assign
+					values[name] = values[name] || [];
+					if (elem.checked && !elem.disabled) {
+						values[name].push(elem.value);
+					}
+				}
+			}
+		}
+
+		for (name in values) {
+			if (form.elements[name] === undefined) {
+				elem = document.createElement('input');
+				elem.setAttribute('name', name);
+				elem.setAttribute('type', 'hidden');
+				form.appendChild(elem);
+			}
+			form.elements[name].value = values[name].join(',');
+		}
+	};
+
+
 	/**
 	 * Setup handlers.
 	 */
 	Nette.initForm = function(form) {
+		if (form.method === 'get' && form.hasAttribute('data-nette-compact')) {
+			form.addEventListener('submit', function() {
+				Nette.compactCheckboxes(form);
+			});
+		}
+
+		check: {
+			for (var i = 0; i < form.elements.length; i++) {
+				if (form.elements[i].getAttribute('data-nette-rules')) {
+					break check;
+				}
+			}
+			return;
+		}
+
 		Nette.toggleForm(form);
 
 		if (form.noValidate) {
 			return;
 		}
-
 		form.noValidate = true;
 
 		form.addEventListener('submit', function(e) {
@@ -692,13 +747,7 @@
 	Nette.initOnLoad = function() {
 		Nette.onDocumentReady(function() {
 			for (var i = 0; i < document.forms.length; i++) {
-				var form = document.forms[i];
-				for (var j = 0; j < form.elements.length; j++) {
-					if (form.elements[j].getAttribute('data-nette-rules')) {
-						Nette.initForm(form);
-						break;
-					}
-				}
+				Nette.initForm(document.forms[i]);
 			}
 
 			document.body.addEventListener('click', function(e) {

tests/Forms/Controls.CheckboxList.loadData.phpt

@@ -29,8 +29,8 @@ $series = [
 ];
 
 
-test(function () use ($series) { // invalid input
-	$_POST = ['list' => 'red-dwarf'];
+test(function () use ($series) { // empty input
+	$_POST = [];
 
 	$form = new Form;
 	$input = $form->addCheckboxList('list', null, $series);
@@ -42,6 +42,19 @@ test(function () use ($series) { // invalid input
 });
 
 
+test(function () use ($series) { // compact mode
+	$_POST = ['list' => 'red-dwarf,0'];
+
+	$form = new Form;
+	$input = $form->addCheckboxList('list', null, $series);
+
+	Assert::true($form->isValid());
+	Assert::same(['red-dwarf', 0], $input->getValue());
+	Assert::same(['red-dwarf' => 'Red Dwarf', 0 => 'South Park'], $input->getSelectedItems());
+	Assert::true($input->isFilled());
+});
+
+
 test(function () use ($series) { // multiple selected items, zero item
 	$_POST = ['multi' => ['red-dwarf', 'unknown', 0]];