Do not show enqueue button if play queue not ready

Author: Stypox

app/src/main/java/org/schabi/newpipe/fragments/list/BaseListFragment.java

@@ -352,7 +352,7 @@ protected void showStreamDialog(final StreamInfoItem item) {
         }
         final List<StreamDialogEntry> entries = new ArrayList<>();
 
-        if (PlayerHolder.getInstance().isPlayerOpen()) {
+        if (PlayerHolder.getInstance().isPlayQueueReady()) {
             entries.add(StreamDialogEntry.enqueue);
 
             if (PlayerHolder.getInstance().getQueueSize() > 1) {

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

@@ -149,7 +149,7 @@ protected void showStreamDialog(final StreamInfoItem item) {
 
         final ArrayList<StreamDialogEntry> entries = new ArrayList<>();
 
-        if (PlayerHolder.getInstance().isPlayerOpen()) {
+        if (PlayerHolder.getInstance().isPlayQueueReady()) {
             entries.add(StreamDialogEntry.enqueue);
 
             if (PlayerHolder.getInstance().getQueueSize() > 1) {

app/src/main/java/org/schabi/newpipe/local/feed/FeedFragment.kt

@@ -362,7 +362,7 @@ class FeedFragment : BaseStateFragment<FeedState>() {
         if (context == null || context.resources == null || activity == null) return
 
         val entries = ArrayList<StreamDialogEntry>()
-        if (PlayerHolder.getInstance().isPlayerOpen) {
+        if (PlayerHolder.getInstance().isPlayQueueReady) {
             entries.add(StreamDialogEntry.enqueue)
 
             if (PlayerHolder.getInstance().queueSize > 1) {

app/src/main/java/org/schabi/newpipe/local/history/StatisticsPlaylistFragment.java

@@ -338,7 +338,7 @@ private void showStreamDialog(final StreamStatisticsEntry item) {
 
         final ArrayList<StreamDialogEntry> entries = new ArrayList<>();
 
-        if (PlayerHolder.getInstance().isPlayerOpen()) {
+        if (PlayerHolder.getInstance().isPlayQueueReady()) {
             entries.add(StreamDialogEntry.enqueue);
 
             if (PlayerHolder.getInstance().getQueueSize() > 1) {

app/src/main/java/org/schabi/newpipe/local/playlist/LocalPlaylistFragment.java

@@ -753,7 +753,7 @@ protected void showStreamItemDialog(final PlaylistStreamEntry item) {
 
         final ArrayList<StreamDialogEntry> entries = new ArrayList<>();
 
-        if (PlayerHolder.getInstance().isPlayerOpen()) {
+        if (PlayerHolder.getInstance().isPlayQueueReady()) {
             entries.add(StreamDialogEntry.enqueue);
 
             if (PlayerHolder.getInstance().getQueueSize() > 1) {

app/src/main/java/org/schabi/newpipe/player/helper/PlayerHolder.java

@@ -70,6 +70,15 @@ public boolean isPlayerOpen() {
         return player != null;
     }
 
+    /**
+     * Use this method to only allow the user to manipulate the play queue (e.g. by enqueueing via
+     * the stream long press menu) when there actually is a play queue to manipulate.
+     * @return true only if the player is open and its play queue is ready (i.e. it is not null)
+     */
+    public boolean isPlayQueueReady() {
+        return player != null && player.getPlayQueue() != null;
+    }
+
     public boolean isBound() {
         return bound;
     }