From 6f950e44b41923680bd2bf049c7f362b65efac27 Mon Sep 17 00:00:00 2001
From: Matthias Schmidt <gravatronics@live.com>
Date: Mon, 21 Dec 2020 19:16:55 +0100
Subject: [PATCH] Add `TInputModeFormField`

---
 .../field/TInputModeFormField.class.php       | 49 +++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 wcfsetup/install/files/lib/system/form/builder/field/TInputModeFormField.class.php

diff --git a/wcfsetup/install/files/lib/system/form/builder/field/TInputModeFormField.class.php b/wcfsetup/install/files/lib/system/form/builder/field/TInputModeFormField.class.php
new file mode 100644
index 0000000000..600b3baa1e
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/form/builder/field/TInputModeFormField.class.php
@@ -0,0 +1,49 @@
+<?php
+namespace wcf\system\form\builder\field;
+
+/**
+ * Provides default implementations of `IInputModeFormField` methods.
+ *
+ * @author      Matthias Schmidt
+ * @copyright   2001-2020 WoltLab GmbH
+ * @license     GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @package     WoltLabSuite\Core\System\Form\Builder\Field
+ * @since       5.4
+ */
+trait TInputModeFormField {
+	/** @var ?string */
+	protected $inputMode;
+	
+	/**
+	 * Returns the `inputmode` attribute of the form field.
+	 *
+	 * If `null` is returned, no `inputmode` attribute will be set.
+	 */
+	public function getInputMode(): ?string {
+		return $this->inputMode;
+	}
+	
+	/**
+	 * Sets the `inputmode` attribute of the form field.
+	 *
+	 * If `null` is given, the attribute is unset.
+	 *
+	 * @throws      \InvalidArgumentException       if an invalid `inputmode` token is included in the attribute value
+	 */
+	public function inputMode(?string $inputMode): self {
+		if ($inputMode !== null && $inputMode !== 'none' && !in_array($inputMode, $this->getValidInputModes())) {
+			throw new \InvalidArgumentException("Invalid inputmode attribute '{$inputMode}'.");
+		}
+		
+		$this->inputMode = $inputMode;
+		
+		return $this;
+	}
+	
+	/**
+	 * Returns all valid `inputmode` tokens.
+	 */
+	protected function getValidInputModes(): array {
+		return [];
+	}
+}
-- 
2.20.1