Fix error panel and search fragment state saving

app/src/main/java/org/schabi/newpipe/fragments/BaseStateFragment.java

@@ -30,7 +30,11 @@ public abstract class BaseStateFragment<I> extends BaseFragment implements ViewC
     private View emptyStateView;
     @Nullable
     private ProgressBar loadingProgressBar;
+
     private ErrorPanelHelper errorPanelHelper;
+    @Nullable
+    @State
+    protected ErrorInfo lastPanelError = null;
 
     @Override
     public void onViewCreated(@NonNull final View rootView, final Bundle savedInstanceState) {
@@ -44,6 +48,14 @@ public abstract class BaseStateFragment<I> extends BaseFragment implements ViewC
         wasLoading.set(isLoading.get());
     }
 
+    @Override
+    public void onResume() {
+        super.onResume();
+        if (lastPanelError != null) {
+            showError(lastPanelError);
+        }
+    }
+
     @Override
     public void onDestroy() {
         super.onDestroy();
@@ -98,7 +110,7 @@ public abstract class BaseStateFragment<I> extends BaseFragment implements ViewC
         if (loadingProgressBar != null) {
             animate(loadingProgressBar, true, 400);
         }
-        errorPanelHelper.hide();
+        hideErrorPanel();
     }
 
     @Override
@@ -109,7 +121,7 @@ public abstract class BaseStateFragment<I> extends BaseFragment implements ViewC
         if (loadingProgressBar != null) {
             animate(loadingProgressBar, false, 0);
         }
-        errorPanelHelper.hide();
+        hideErrorPanel();
     }
 
     public void showEmptyState() {
@@ -120,7 +132,7 @@ public abstract class BaseStateFragment<I> extends BaseFragment implements ViewC
         if (loadingProgressBar != null) {
             animate(loadingProgressBar, false, 0);
         }
-        errorPanelHelper.hide();
+        hideErrorPanel();
     }
 
     @Override
@@ -158,6 +170,7 @@ public abstract class BaseStateFragment<I> extends BaseFragment implements ViewC
         }
 
         errorPanelHelper.showError(errorInfo);
+        lastPanelError = errorInfo;
     }
 
     public final void showTextError(@NonNull final String errorString) {
@@ -175,6 +188,7 @@ public abstract class BaseStateFragment<I> extends BaseFragment implements ViewC
 
     public final void hideErrorPanel() {
         errorPanelHelper.hide();
+        lastPanelError = null;
     }
 
     public final boolean isErrorPanelVisible() {

app/src/main/java/org/schabi/newpipe/fragments/list/search/SearchFragment.java

@@ -256,13 +256,19 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
                     "Getting service for id " + serviceId, e);
         }
 
+        if (suggestionDisposable == null || suggestionDisposable.isDisposed()) {
+            initSuggestionObserver();
+        }
+
         if (!TextUtils.isEmpty(searchString)) {
             if (wasLoading.getAndSet(false)) {
                 search(searchString, contentFilter, sortFilter);
+                return;
             } else if (infoListAdapter.getItemsList().isEmpty()) {
                 if (savedState == null) {
                     search(searchString, contentFilter, sortFilter);
-                } else if (!isLoading.get() && !wasSearchFocused) {
+                    return;
+                } else if (!isLoading.get() && !wasSearchFocused && lastPanelError == null) {
                     infoListAdapter.clearStreamItemList();
                     showEmptyState();
                 }
@@ -274,10 +280,6 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
         disposables.add(showMetaInfoInTextView(metaInfo == null ? null : Arrays.asList(metaInfo),
                     searchBinding.searchMetaInfoTextView, searchBinding.searchMetaInfoSeparator));
 
-        if (suggestionDisposable == null || suggestionDisposable.isDisposed()) {
-            initSuggestionObserver();
-        }
-
         if (TextUtils.isEmpty(searchString) || wasSearchFocused) {
             showKeyboardSearch();
             showSuggestionsPanel();
@@ -719,14 +721,12 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
             suggestionDisposable.dispose();
         }
 
-        final Observable<String> observable = suggestionPublisher
+        suggestionDisposable = suggestionPublisher
                 .debounce(SUGGESTIONS_DEBOUNCE, TimeUnit.MILLISECONDS)
                 .startWithItem(searchString != null
                         ? searchString
                         : "")
-                .filter(ss -> isSuggestionsEnabled);
-
-        suggestionDisposable = observable
+                .filter(ss -> isSuggestionsEnabled)
                 .switchMap(query -> {
                     final Flowable<List<SearchHistoryEntry>> flowable = historyRecordManager
                             .getRelatedSearches(query, 3, 25);

app/src/main/res/layout/fragment_search.xml

@@ -107,8 +107,7 @@
         layout="@layout/error_panel"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_centerHorizontal="true"
-        android:layout_marginTop="50dp"
+        android:layout_centerInParent="true"
         android:visibility="gone"
         tools:visibility="visible" />