From 56cc0a44ae4115fd1c1f517f1a2cd1785962f7ae Mon Sep 17 00:00:00 2001
From: Mikko Tapionlinna <mikko.tapionlinna@siili.com>
Date: Tue, 27 Feb 2024 15:48:40 +0200
Subject: [PATCH 1/2] UHF-X: Add original alt attribute to all images

---
 hdbt.theme | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hdbt.theme b/hdbt.theme
index e37cdf0ea..9e2b06919 100644
--- a/hdbt.theme
+++ b/hdbt.theme
@@ -1165,6 +1165,7 @@ function hdbt_preprocess_responsive_image_formatter(&$variables): void {
 
   // Override alt text if alteration exists.
   if (!empty($variables['item']->altered_alt_text)) {
+    $variables['responsive_image']['#attributes']['data-original-alt'] = $variables['responsive_image']['#attributes']['alt'];
     $variables['responsive_image']['#attributes']['alt'] = $variables['item']->altered_alt_text;
   }
 

From b732d79d151d0649141824c30bccf997fcf4039f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Markus=20Kalij=C3=A4rvi?= <markus.kalijarvi@druid.fi>
Date: Tue, 27 Feb 2024 16:27:16 +0200
Subject: [PATCH 2/2] Check for the existence of alt attribute before applying
 it to data-attribute.

---
 hdbt.theme | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/hdbt.theme b/hdbt.theme
index 9e2b06919..6e1e00823 100644
--- a/hdbt.theme
+++ b/hdbt.theme
@@ -1165,7 +1165,10 @@ function hdbt_preprocess_responsive_image_formatter(&$variables): void {
 
   // Override alt text if alteration exists.
   if (!empty($variables['item']->altered_alt_text)) {
-    $variables['responsive_image']['#attributes']['data-original-alt'] = $variables['responsive_image']['#attributes']['alt'];
+    // Set original alt text to data attribute.
+    if (isset($variables['responsive_image']['#attributes']['alt'])) {
+      $variables['responsive_image']['#attributes']['data-original-alt'] = $variables['responsive_image']['#attributes']['alt'];
+    }
     $variables['responsive_image']['#attributes']['alt'] = $variables['item']->altered_alt_text;
   }