From 7a67f37abca66a0dd689840b57c13e46e032bd4a Mon Sep 17 00:00:00 2001
From: alperozturk <alper_ozturk@proton.me>
Date: Fri, 30 Aug 2024 16:13:48 +0200
Subject: [PATCH] Fix onBackPress behaviour

Signed-off-by: alperozturk <alper_ozturk@proton.me>
---
 .../owncloud/android/datamodel/OCFile.java    |  4 +++
 .../ui/activity/FileDisplayActivity.java      | 34 +++++++++++++------
 2 files changed, 28 insertions(+), 10 deletions(-)

diff --git a/app/src/main/java/com/owncloud/android/datamodel/OCFile.java b/app/src/main/java/com/owncloud/android/datamodel/OCFile.java
index 3884eefa9003..454b39cad85d 100644
--- a/app/src/main/java/com/owncloud/android/datamodel/OCFile.java
+++ b/app/src/main/java/com/owncloud/android/datamodel/OCFile.java
@@ -701,6 +701,10 @@ public long getFileId() {
         return this.fileId;
     }
 
+    public boolean isRoot() {
+        return isFolder() && getFileId() == 1;
+    }
+
     public long getParentId() {
         return this.parentId;
     }
diff --git a/app/src/main/java/com/owncloud/android/ui/activity/FileDisplayActivity.java b/app/src/main/java/com/owncloud/android/ui/activity/FileDisplayActivity.java
index bf66e8f92e09..0abe87cfe371 100644
--- a/app/src/main/java/com/owncloud/android/ui/activity/FileDisplayActivity.java
+++ b/app/src/main/java/com/owncloud/android/ui/activity/FileDisplayActivity.java
@@ -1006,24 +1006,38 @@ private Boolean isRootDirectory() {
     @Override
     public void onBackPressed() {
         final boolean isDrawerOpen = isDrawerOpen();
-        final boolean isSearchOpen = isSearchOpen();
-
-        final Fragment leftFragment = getLeftFragment();
+        if (isDrawerOpen) {
+            super.onBackPressed();
+            return;
+        }
 
+        final boolean isSearchOpen = isSearchOpen();
         if (isSearchOpen) {
             resetSearchAction();
-        } else if (isDrawerOpen) {
-            super.onBackPressed();
-        } else if (leftFragment instanceof OCFileListFragment listOfFiles) {
+            return;
+        }
 
-            // all closed
+        final Fragment leftFragment = getLeftFragment();
+        if (leftFragment instanceof OCFileListFragment listOfFiles) {
             OCFile currentDir = getCurrentDir();
+            OCFile parentDir = fileDataStorageManager.getFileById(currentDir.getParentId());
+
             if (isRoot(currentDir)) {
                 finish();
-                return;
+            } else if (parentDir != null && parentDir.isRoot()) {
+                openDrawer();
+            } else {
+                browseUp(listOfFiles);
+
+                if (parentDir != null) {
+                    OCFile grandParentDir = fileDataStorageManager.getFileById(parentDir.getParentId());
+                    if (grandParentDir != null) {
+                        if (grandParentDir.isRoot()) {
+                            filterCurrentDirectory();
+                        }
+                    }
+                }
             }
-            browseUp(listOfFiles);
-            filterCurrentDirectory();
         } else {
             popBack();
         }