added FormFactory & DI service

src/Bridges/FormsDI/FormsExtension.php

@@ -26,6 +26,17 @@ public function __construct()
 	}
 
 
+	public function beforeCompile()
+	{
+		$builder = $this->getContainerBuilder();
+
+		if ($builder->findByType(Nette\Http\IRequest::class)) {
+			$builder->addDefinition($this->prefix('factory'))
+				->setFactory(Nette\Forms\FormFactory::class);
+		}
+	}
+
+
 	public function afterCompile(Nette\PhpGenerator\ClassType $class)
 	{
 		$initialize = $this->initialization ?? $class->getMethod('initialize');

src/Forms/Form.php

@@ -666,6 +666,13 @@ public function getToggles(): array
 	/********************* backend ****************d*g**/
 
 
+	/** @internal */
+	public function setHttpRequest(Nette\Http\IRequest $request)
+	{
+		$this->httpRequest = $request;
+	}
+
+
 	private function getHttpRequest(): Nette\Http\IRequest
 	{
 		if (!$this->httpRequest) {

src/Forms/FormFactory.php

@@ -0,0 +1,38 @@
+<?php
+
+/**
+ * This file is part of the Nette Framework (https://nette.org)
+ * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
+ */
+
+declare(strict_types=1);
+
+namespace Nette\Forms;
+
+use Nette;
+
+
+/**
+ * Creates form.
+ */
+final class FormFactory
+{
+	use Nette\StaticClass;
+
+	/** @var Nette\Http\IRequest */
+	private $httpRequest;
+
+
+	public function __construct(Nette\Http\IRequest $httpRequest)
+	{
+		$this->httpRequest = $httpRequest;
+	}
+
+
+	public function createForm(string $name = null): Form
+	{
+		$form = new Form($name);
+		$form->setHttpRequest($this->httpRequest);
+		return $form;
+	}
+}

tests/Forms.DI/FormsExtension.phpt

@@ -52,3 +52,18 @@ Assert::exception(function () {
 
 	eval($compiler->addConfig($config)->setClassName('Container2')->compile());
 }, Nette\InvalidArgumentException::class, 'Constant Nette\Forms\Form::Foo\Bar or constant Foo\Bar does not exist.');
+
+
+test('form factory', function () {
+	$compiler = new DI\Compiler;
+	$compiler->addExtension('http', new Nette\Bridges\HttpDI\HttpExtension);
+	$compiler->addExtension('forms', new FormsExtension);
+
+	eval($compiler->setClassName('Container3')->compile());
+
+	$container = new Container3;
+	$container->initialize();
+	$factory = $container->getByType(Nette\Forms\FormFactory::class);
+	$form = $factory->createForm();
+	Assert::type(Form::class, $form);
+});

tests/Forms/FormFactory.phpt

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+use Nette\Forms\Form;
+use Nette\Forms\FormFactory;
+use Tester\Assert;
+
+
+require __DIR__ . '/../bootstrap.php';
+
+
+$request = (new Nette\Http\RequestFactory)->fromGlobals();
+$factory = new FormFactory($request);
+$form = $factory->createForm();
+Assert::type(Form::class, $form);
+
+
+$form = $factory->createForm('foo');
+Assert::same('foo', $form->getName());