From 419c10632bf1df3f34ceb09a689650ec70550593 Mon Sep 17 00:00:00 2001
From: Anderson Mesquita <andersonvom@gmail.com>
Date: Sat, 4 May 2019 23:56:16 -0400
Subject: Scroll to chapter currently being played

This is especially helpful for episodes that have a large number of
chapters.

Closes: #2853
---
 .../antennapod/fragment/ChaptersFragment.java      | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

(limited to 'app/src/main/java/de/danoeh/antennapod/fragment')

diff --git a/app/src/main/java/de/danoeh/antennapod/fragment/ChaptersFragment.java b/app/src/main/java/de/danoeh/antennapod/fragment/ChaptersFragment.java
index 8f2073ed0..4bd357f69 100644
--- a/app/src/main/java/de/danoeh/antennapod/fragment/ChaptersFragment.java
+++ b/app/src/main/java/de/danoeh/antennapod/fragment/ChaptersFragment.java
@@ -5,6 +5,9 @@ import android.support.v4.app.ListFragment;
 import android.view.View;
 import android.widget.ListView;
 
+import java.util.List;
+import java.util.ListIterator;
+
 import de.danoeh.antennapod.R;
 import de.danoeh.antennapod.adapter.ChaptersListAdapter;
 import de.danoeh.antennapod.core.event.ServiceEvent;
@@ -13,7 +16,6 @@ import de.danoeh.antennapod.core.util.playback.Playable;
 import de.danoeh.antennapod.core.util.playback.PlaybackController;
 import de.greenrobot.event.EventBus;
 
-
 public class ChaptersFragment extends ListFragment {
     private static final String TAG = "ChaptersFragment";
     private ChaptersListAdapter adapter;
@@ -67,6 +69,23 @@ public class ChaptersFragment extends ListFragment {
         controller = null;
     }
 
+    private void scrollTo(int position) {
+        getListView().setSelection(position);
+    }
+
+    private int getCurrentChapter(Playable media) {
+        int currentPosition = controller.getPosition();
+
+        List<Chapter> chapters = media.getChapters();
+        for (final ListIterator<Chapter> it = chapters.listIterator(); it.hasNext(); ) {
+            Chapter chapter = it.next();
+            if (chapter.getStart() > currentPosition) {
+                return it.previousIndex() - 1;
+            }
+        }
+        return chapters.size() - 1;
+    }
+
     public void onEventMainThread(ServiceEvent event) {
         if (event.action == ServiceEvent.Action.SERVICE_STARTED && controller != null) {
             controller.init();
@@ -81,6 +100,7 @@ public class ChaptersFragment extends ListFragment {
                 setEmptyText(getString(R.string.no_chapters_label));
             } else {
                 setEmptyText(null);
+                scrollTo(getCurrentChapter(media));
             }
         }
     }
-- 
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