Add playlist description to PlaylistFragment

app/src/main/java/org/schabi/newpipe/fragments/list/playlist/PlaylistFragment.java

@@ -1,7 +1,9 @@
 package org.schabi.newpipe.fragments.list.playlist;
 
+import static org.schabi.newpipe.extractor.utils.Utils.isBlank;
 import static org.schabi.newpipe.ktx.ViewUtils.animate;
 import static org.schabi.newpipe.ktx.ViewUtils.animateHideRecyclerViewAllowingScrolling;
+import static org.schabi.newpipe.util.text.TextLinkifier.SET_LINK_MOVEMENT_METHOD;
 
 import android.content.Context;
 import android.os.Bundle;
@@ -17,6 +19,7 @@ import android.view.ViewGroup;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.appcompat.content.res.AppCompatResources;
+import androidx.core.text.HtmlCompat;
 
 import com.google.android.material.shape.CornerFamily;
 import com.google.android.material.shape.ShapeAppearanceModel;
@@ -37,6 +40,7 @@ import org.schabi.newpipe.extractor.ListExtractor;
 import org.schabi.newpipe.extractor.ServiceList;
 import org.schabi.newpipe.extractor.playlist.PlaylistInfo;
 import org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper;
+import org.schabi.newpipe.extractor.stream.Description;
 import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 import org.schabi.newpipe.fragments.list.BaseListInfoFragment;
 import org.schabi.newpipe.info_list.dialog.InfoItemDialog;
@@ -51,6 +55,7 @@ import org.schabi.newpipe.util.NavigationHelper;
 import org.schabi.newpipe.util.image.PicassoHelper;
 import org.schabi.newpipe.util.external_communication.ShareUtils;
 import org.schabi.newpipe.util.PlayButtonHelper;
+import org.schabi.newpipe.util.text.TextLinkifier;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -321,6 +326,18 @@ public class PlaylistFragment extends BaseListInfoFragment<StreamInfoItem, Playl
         headerBinding.playlistStreamCount.setText(Localization
                 .localizeStreamCount(getContext(), result.getStreamCount()));
 
+        final Description description = result.getDescription();
+        if (description != null && description != Description.EMPTY_DESCRIPTION
+                && !isBlank(description.getContent())) {
+            TextLinkifier.fromDescription(headerBinding.playlistDescription,
+                    description, HtmlCompat.FROM_HTML_MODE_LEGACY,
+                    result.getService(), result.getUrl(),
+                    disposables, SET_LINK_MOVEMENT_METHOD);
+            headerBinding.playlistDescription.setVisibility(View.VISIBLE);
+        } else {
+            headerBinding.playlistDescription.setVisibility(View.GONE);
+        }
+
         if (!result.getErrors().isEmpty()) {
             showSnackBarError(new ErrorInfo(result.getErrors(), UserAction.REQUESTED_PLAYLIST,
                     result.getUrl(), result));

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

@@ -80,10 +80,19 @@
             tools:text="234 videos" />
     </RelativeLayout>
 
+    <org.schabi.newpipe.views.NewPipeTextView
+        android:id="@+id/playlist_description"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_below="@id/playlist_meta"
+        android:paddingHorizontal="@dimen/video_item_search_padding"
+        android:paddingTop="6dp"
+        tools:text="This is a multiline playlist description. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nunc tristique vitae sem vitae blandit" />
+
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_below="@id/playlist_meta">
+        android:layout_below="@id/playlist_description">
 
         <include
             android:id="@+id/playlist_control"