From 2c0402061be6412792e1bb2c70089525f5387d5b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mehmet=20=C3=87etin?=
 <92744169+mehmetcetin01140@users.noreply.github.com>
Date: Wed, 12 Jun 2024 14:02:33 +0300
Subject: [PATCH] Fixed #15830 - Accessibility: Tree inside an Accordion (arrow
 navigation)

---
 src/app/components/accordion/accordion.ts | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/src/app/components/accordion/accordion.ts b/src/app/components/accordion/accordion.ts
index 333a5de89aa..238e2ab0b61 100755
--- a/src/app/components/accordion/accordion.ts
+++ b/src/app/components/accordion/accordion.ts
@@ -230,11 +230,7 @@ export class AccordionTab implements AfterContentInit, OnDestroy {
 
     accordion: Accordion;
 
-    constructor(
-        @Inject(forwardRef(() => Accordion)) accordion: Accordion,
-        public el: ElementRef,
-        public changeDetector: ChangeDetectorRef
-    ) {
+    constructor(@Inject(forwardRef(() => Accordion)) accordion: Accordion, public el: ElementRef, public changeDetector: ChangeDetectorRef) {
         this.accordion = accordion as Accordion;
         this.id = UniqueComponentId();
     }
@@ -441,10 +437,7 @@ export class Accordion implements BlockableUI, AfterContentInit, OnDestroy {
 
     public tabs: AccordionTab[] = [];
 
-    constructor(
-        public el: ElementRef,
-        public changeDetector: ChangeDetectorRef
-    ) {}
+    constructor(public el: ElementRef, public changeDetector: ChangeDetectorRef) {}
 
     @HostListener('keydown', ['$event'])
     onKeydown(event) {
@@ -481,8 +474,12 @@ export class Accordion implements BlockableUI, AfterContentInit, OnDestroy {
         return tagName?.toLowerCase() === 'textarea';
     }
 
+    focusedElementIsAccordionHeader() {
+        return document.activeElement.tagName.toLowerCase() === 'a' && document.activeElement.classList.contains('p-accordion-header-link');
+    }
+
     onTabArrowDownKey(event) {
-        if (!this.isInput(event) && !this.isTextArea(event)) {
+        if (!this.isInput(event) && !this.isTextArea(event) && this.focusedElementIsAccordionHeader()) {
             const nextHeaderAction = this.findNextHeaderAction(event.target.parentElement.parentElement.parentElement);
             nextHeaderAction ? this.changeFocusedTab(nextHeaderAction) : this.onTabHomeKey(event);
 
@@ -491,7 +488,7 @@ export class Accordion implements BlockableUI, AfterContentInit, OnDestroy {
     }
 
     onTabArrowUpKey(event) {
-        if (!this.isInput(event) && !this.isTextArea(event)) {
+        if (!this.isInput(event) && !this.isTextArea(event) && this.focusedElementIsAccordionHeader()) {
             const prevHeaderAction = this.findPrevHeaderAction(event.target.parentElement.parentElement.parentElement);
             prevHeaderAction ? this.changeFocusedTab(prevHeaderAction) : this.onTabEndKey(event);