Macros for manual form rendering in Nette Framework

bootstrap.php

<?php

// blabla...

Nette\Templates\FormMacros::register();

// blabla...

FormMacros.php

<?php
namespace Nette\Templates;

use Nette;
use Nette\String;
use Nette\Forms\Form;

/**
 * Form macros
 *
 * @author    Jan Marek, Jan Tvrdík
 * @license   MIT
 */
class FormMacros extends Nette\Object
{
	/** @var Nette\Forms\Form */
	private static $form;

	/** @var int */
	private static $containerLevel = 0;

	public function __construct()
	{
		throw new \InvalidStateException("Static class.");
	}

	public static function register()
	{
		LatteMacros::$defaultMacros["form"] = '<?php %Nette\Templates\FormMacros::macroBegin% ?>';
		LatteMacros::$defaultMacros["input"] = '<?php %Nette\Templates\FormMacros::macroInput% ?>';
		LatteMacros::$defaultMacros["label"] = '<?php %Nette\Templates\FormMacros::macroLabel% ?>';
		LatteMacros::$defaultMacros["/form"] = '<?php Nette\Templates\FormMacros::end() ?>';
		LatteMacros::$defaultMacros["formContainer"] = '<?php %Nette\Templates\FormMacros::macroBeginContainer% ?>';
		LatteMacros::$defaultMacros["/formContainer"] = '<?php Nette\Templates\FormMacros::endContainer() ?>';
	}

	public static function macroBegin($content)
	{
		list($name, $modifiers) = self::fetchNameAndModifiers($content);
		return "\$formErrors = Nette\Templates\FormMacros::begin($name, \$control, $modifiers)->getErrors()";
	}

	public static function macroBeginContainer($content)
	{
		$name = LatteFilter::formatString(LatteFilter::fetchToken($content));
		return 'Nette\Templates\FormMacros::beginContainer(' . $name . ')';
	}

	public static function beginContainer($name)
	{
		$container = self::$form[$name];
		if (!$container instanceof Nette\Forms\FormContainer) {
			throw new \InvalidArgumentException();
		}
		self::$form = $container;
		self::$containerLevel++;
	}

	public static function endContainer()
	{
		if (self::$containerLevel < 1) {
			throw new \InvalidStateException('Trying to close container which is not open.');
       	}

		self::$form = self::$form->getParent();
		self::$containerLevel--;
	}


	public static function begin($form, $control, $modifiers = array())
	{
		if ($form instanceof Form) {
			self::$form = $form;
		} else {
			self::$form = $control[$form];
		}

		if (isset($modifiers["class"])) {
			self::$form->getElementPrototype()->class[] = $modifiers["class"];
		}

		self::$form->render("begin");

		return self::$form;
	}


	public static function end()
	{
		if (self::$containerLevel > 0) {
			throw new \InvalidStateException('There are some unclosed containers.');
       	}
		self::$form->render("end");
	}

	public static function macroInput($content)
	{
		list($name, $modifiers) = self::fetchNameAndModifiers($content);
		return "Nette\Templates\FormMacros::input($name, $modifiers)";
	}


	public static function input($name, $modifiers = array())
	{
		$input = self::$form[$name]->getControl();

		if (isset($modifiers["size"])) {
			$input->size($modifiers["size"]);
		}

		if (isset($modifiers["rows"])) {
			$input->rows($modifiers["rows"]);
		}

		if (isset($modifiers["cols"])) {
			$input->cols($modifiers["cols"]);
		}

		if (isset($modifiers["class"])) {
			$input->class[] = $modifiers["class"];
		}

		if (isset($modifiers["style"])) {
			$input->style($modifiers["style"]);
		}

		echo $input;
	}


	public static function macroLabel($content)
	{
		list($name, $modifiers) = self::fetchNameAndModifiers($content);
		return "Nette\Templates\FormMacros::label($name, $modifiers)";
	}


	public static function label($name, $modifiers = array())
	{
		$label = self::$form[$name]->getLabel();

		if (isset($modifiers["text"])) {
			$label->setText($modifiers["text"]);
		}

		if (isset($modifiers["class"])) {
			$label->class[] = $modifiers["class"];
		}

		if (isset($modifiers["style"])) {
			$label->style($modifiers["style"]);
		}

		echo $label;
	}


	// helper
	private static function fetchNameAndModifiers($code)
	{
		$name = LatteFilter::fetchToken($code);
		$modifiers = LatteFilter::formatArray($code);
		$name = LatteFilter::formatString($name);
		$modifiers = $modifiers ?: 'array()';

		return array($name, $modifiers);
	}
}

template.phtml

{form nazevFormu}

<p class="error" n:foreach="$formErrors as $error">{$error}</p>

<p>{label name class => "big", text => "Jméno:"} {input name size => 30}</p>
<p>{input ok text => "Odeslat formulář"}</p>

{/form}

TestPresenter.php

<?php

class TestPresenter extends BasePresenter {

	protected function createComponentNazevFormu() {
		$form = new Nette\Application\AppForm;
		$form->addText("name");
		$form->addSubmit("ok");
		return $form;
	}

}