Add comments and annotations

Author: TobiGr

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

@@ -167,6 +167,10 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
 
     /*////////////////////////////////////////////////////////////////////////*/
 
+    /**
+     * TextWatcher to remove rich-text formatting on the search EditText when pasting content
+     * from the clipboard.
+     */
     private TextWatcher textWatcher;
 
     public static SearchFragment getInstance(final int serviceId, final String searchString) {
@@ -583,11 +587,13 @@ public void onSuggestionItemLongClick(final SuggestionItem item) {
             @Override
             public void beforeTextChanged(final CharSequence s, final int start,
                                           final int count, final int after) {
+                // Do nothing, old text is already clean
             }
 
             @Override
             public void onTextChanged(final CharSequence s, final int start,
                                       final int before, final int count) {
+                // Changes are handled in afterTextChanged; CharSequence cannot be changed here.
             }
 
             @Override

app/src/main/java/org/schabi/newpipe/player/playqueue/SinglePlayQueue.java

@@ -1,5 +1,7 @@
 package org.schabi.newpipe.player.playqueue;
 
+import androidx.annotation.NonNull;
+
 import org.schabi.newpipe.extractor.stream.StreamInfo;
 import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 
@@ -20,11 +22,11 @@ public SinglePlayQueue(final StreamInfo info, final long startPosition) {
         getItem().setRecoveryPosition(startPosition);
     }
 
-    public SinglePlayQueue(final List<StreamInfoItem> items, final int index) {
+    public SinglePlayQueue(@NonNull final List<StreamInfoItem> items, final int index) {
         super(index, playQueueItemsOf(items));
     }
 
-    private static List<PlayQueueItem> playQueueItemsOf(final List<StreamInfoItem> items) {
+    private static List<PlayQueueItem> playQueueItemsOf(@NonNull final List<StreamInfoItem> items) {
         final List<PlayQueueItem> playQueueItems = new ArrayList<>(items.size());
         for (final StreamInfoItem item : items) {
             playQueueItems.add(new PlayQueueItem(item));
@@ -39,5 +41,7 @@ public boolean isComplete() {
 
     @Override
     public void fetch() {
+        // Item was already passed in constructor.
+        // No further items need to be fetched as this is a PlayQueue with only one item
     }
 }