From 1d0dc756b60d40e564839290a39b1d5b5fbe390b Mon Sep 17 00:00:00 2001
From: Ryan Cramer <ryan@processwire.com>
Date: Fri, 25 Oct 2019 10:06:18 -0400
Subject: [PATCH] Add support for custom type-specific Inputfield classes and
 attributes to be added via markup array in InputfieldWrapper

---
 wire/core/InputfieldWrapper.php | 46 +++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/wire/core/InputfieldWrapper.php b/wire/core/InputfieldWrapper.php
index db8cc7ac..e3fd45b7 100644
--- a/wire/core/InputfieldWrapper.php
+++ b/wire/core/InputfieldWrapper.php
@@ -424,6 +424,34 @@ class InputfieldWrapper extends Inputfield implements \Countable, \IteratorAggre
 		return $children;
 	}
 
+	/**
+	 * Cached class parents indexed by Inputfield class name
+	 * 
+	 * @var array
+	 * 
+	 */
+	static protected $classParents = array();
+
+	/**
+	 * Get array of parent Inputfield classes for given Inputfield (excluding the base Inputfield class)
+	 * 
+	 * @param Inputfield|string $inputfield
+	 * @return array
+	 * 
+	 */
+	protected function classParents($inputfield) {
+		$p = &self::$classParents;
+		$c = is_object($inputfield) ? $inputfield->className() : $inputfield;
+		if(!isset($p[$c])) {
+			$p[$c] = array();
+			foreach(wireClassParents($inputfield) as $parentClass) {
+				if(strpos($parentClass, 'Inputfield') !== 0 || $parentClass === 'Inputfield') break;
+				$p[$c][] = $parentClass;
+			}
+		}
+		return $p[$c];	
+	}
+
 	/**
 	 * Render this Inputfield and the output of its children.
 	 * 
@@ -483,6 +511,24 @@ class InputfieldWrapper extends Inputfield implements \Countable, \IteratorAggre
 			
 			if($collapsed == Inputfield::collapsedHidden) continue; 
 			if($collapsed == Inputfield::collapsedNoLocked || $collapsed == Inputfield::collapsedYesLocked) $renderValueMode = true;
+
+			// allow adding custom classes and/or attributes at runtime (since 3.0.143)
+			$classParents = $this->classParents($inputfield);
+			$classParents[] = $inputfieldClass;
+			foreach($classParents as $classParent) {
+				if(!isset($_markup[$classParent])) continue;
+				$markupParent = $_markup[$classParent];
+				foreach(array('class', 'wrapClass', 'headerClass', 'contentClass') as $classKey) {
+					if(!empty($markupParent[$classKey])) $inputfield->addClass($markupParent[$classKey], $classKey);
+				}
+				foreach(array('attr', 'wrapAttr') as $attrKey) {
+					if(!empty($markupParent[$attrKey]) && is_array($markupParent[$attrKey])) {
+						foreach($markupParent[$attrKey] as $k => $v) {
+							$inputfield->$attrKey($k, $v);
+						}
+					}
+				}
+			}
 			
 			$ffOut = $this->renderInputfield($inputfield, $renderValueMode);
 			if(!strlen($ffOut)) continue;