Added option to enable folder subscription management

app/src/main/java/eu/faircode/email/AdapterFolder.java

@@ -73,6 +73,7 @@ public class AdapterFolder extends RecyclerView.Adapter<AdapterFolder.ViewHolder
     private EntityFolder parent;
     private boolean collapsable;
     private IProperties properties;
+    private boolean subscriptions;
     private boolean debug;
     private int dp12;
     private float textSize;
@@ -227,7 +228,7 @@ public class AdapterFolder extends RecyclerView.Adapter<AdapterFolder.ViewHolder
             ivExpander.setVisibility(account < 0 || !collapsable ? View.GONE : (folder.childs > 0 ? View.VISIBLE : View.INVISIBLE));
 
             ivNotify.setVisibility(folder.notify ? View.VISIBLE : View.GONE);
-            ivSubscribed.setVisibility(BuildConfig.DEBUG && folder.subscribed != null && folder.subscribed ? View.VISIBLE : View.GONE);
+            ivSubscribed.setVisibility(subscriptions && folder.subscribed != null && folder.subscribed ? View.VISIBLE : View.GONE);
 
             if (folder.unseen > 0)
                 tvName.setText(context.getString(R.string.title_name_count,
@@ -593,6 +594,7 @@ public class AdapterFolder extends RecyclerView.Adapter<AdapterFolder.ViewHolder
         if (zoom == 0)
             zoom = 1;
 
+        this.subscriptions = prefs.getBoolean("subscriptions", false);
         this.debug = prefs.getBoolean("debug", false);
 
         this.dp12 = Helper.dp2pixels(context, 12);

app/src/main/java/eu/faircode/email/FragmentFolder.java

@@ -21,8 +21,10 @@ package eu.faircode.email;
 
 import android.content.Context;
 import android.content.DialogInterface;
+import android.content.SharedPreferences;
 import android.os.Build;
 import android.os.Bundle;
+import android.preference.PreferenceManager;
 import android.text.TextUtils;
 import android.view.LayoutInflater;
 import android.view.Menu;
@@ -290,8 +292,11 @@ public class FragmentFolder extends FragmentBase {
 
     @Override
     public void onPrepareOptionsMenu(Menu menu) {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getContext());
+        boolean subscriptions = prefs.getBoolean("subscriptions", false);
+
         menu.findItem(R.id.menu_subscribe).setChecked(subscribed != null && subscribed);
-        menu.findItem(R.id.menu_subscribe).setVisible(id > 0 && subscribed != null);
+        menu.findItem(R.id.menu_subscribe).setVisible(subscriptions && id > 0 && subscribed != null);
         menu.findItem(R.id.menu_delete).setVisible(id > 0 && !saving && deletable);
         super.onPrepareOptionsMenu(menu);
     }

app/src/main/java/eu/faircode/email/FragmentOptions.java

@@ -104,6 +104,7 @@ public class FragmentOptions extends FragmentBase implements SharedPreferences.O
     private SwitchCompat swAutoSend;
 
     private SwitchCompat swBadge;
+    private SwitchCompat swSubscriptions;
     private SwitchCompat swNotifyPreview;
     private SwitchCompat swSearchLocal;
     private SwitchCompat swLight;
@@ -124,6 +125,7 @@ public class FragmentOptions extends FragmentBase implements SharedPreferences.O
             "startup", "date", "threading", "avatars", "identicons", "circular", "name_email", "subject_italic", "flags", "preview",
             "addresses", "monospaced", "autohtml", "autoimages", "actionbar",
             "pull", "swipenav", "autoexpand", "autoclose", "autonext",
+            "subscriptions",
             "authentication", "debug"
     };
 
@@ -134,7 +136,7 @@ public class FragmentOptions extends FragmentBase implements SharedPreferences.O
             "addresses", "monospaced", "autohtml", "autoimages", "actionbar",
             "pull", "swipenav", "autoexpand", "autoclose", "autonext", "collapse", "autoread", "automove",
             "autoresize", "resize", "prefix_once", "autosend",
-            "notify_preview", "search_local", "light", "sound",
+            "subscriptions", "notify_preview", "search_local", "light", "sound",
             "authentication", "paranoid", "english", "updates", "debug",
             "first", "why", "last_update_check", "app_support", "message_swipe", "message_select", "folder_actions", "folder_sync",
             "edit_ref_confirmed", "show_html_confirmed", "show_images_confirmed", "print_html_confirmed", "show_organization", "style_toolbar"
@@ -191,6 +193,7 @@ public class FragmentOptions extends FragmentBase implements SharedPreferences.O
         swAutoSend = view.findViewById(R.id.swAutoSend);
 
         swBadge = view.findViewById(R.id.swBadge);
+        swSubscriptions = view.findViewById(R.id.swSubscriptions);
         swNotifyPreview = view.findViewById(R.id.swNotifyPreview);
         swSearchLocal = view.findViewById(R.id.swSearchLocal);
         swLight = view.findViewById(R.id.swLight);
@@ -509,6 +512,13 @@ public class FragmentOptions extends FragmentBase implements SharedPreferences.O
             }
         });
 
+        swSubscriptions.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
+            @Override
+            public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
+                prefs.edit().putBoolean("subscriptions", checked).apply();
+            }
+        });
+
         swNotifyPreview.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
             @Override
             public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
@@ -731,6 +741,7 @@ public class FragmentOptions extends FragmentBase implements SharedPreferences.O
         swAutoSend.setChecked(!prefs.getBoolean("autosend", false));
 
         swBadge.setChecked(prefs.getBoolean("badge", true));
+        swSubscriptions.setChecked(prefs.getBoolean("subscriptions", false));
         swNotifyPreview.setChecked(prefs.getBoolean("notify_preview", true));
         swNotifyPreview.setEnabled(Helper.isPro(getContext()));
         swSearchLocal.setChecked(prefs.getBoolean("search_local", false));

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

@@ -789,6 +789,31 @@
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintTop_toBottomOf="@id/swBadge" />
 
+            <androidx.appcompat.widget.SwitchCompat
+                android:id="@+id/swSubscriptions"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="12dp"
+                android:layout_marginTop="12dp"
+                android:layout_marginEnd="12dp"
+                android:text="@string/title_advanced_subscriptions"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toBottomOf="@id/tvBadgeHint"
+                app:switchPadding="12dp" />
+
+            <TextView
+                android:id="@+id/tvSubscriptionsHint"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="12dp"
+                android:layout_marginEnd="60dp"
+                android:text="@string/title_advanced_subscriptions_hint"
+                android:textAppearance="@style/TextAppearance.AppCompat.Small"
+                android:textStyle="italic"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toBottomOf="@id/swSubscriptions" />
+
             <androidx.appcompat.widget.SwitchCompat
                 android:id="@+id/swNotifyPreview"
                 android:layout_width="match_parent"
@@ -798,7 +823,7 @@
                 android:layout_marginEnd="12dp"
                 android:text="@string/title_advanced_notify_preview"
                 app:layout_constraintStart_toStartOf="parent"
-                app:layout_constraintTop_toBottomOf="@id/tvBadgeHint"
+                app:layout_constraintTop_toBottomOf="@id/tvSubscriptionsHint"
                 app:switchPadding="12dp" />
 
             <TextView

app/src/main/res/values/strings.xml

@@ -194,6 +194,7 @@
     <string name="title_advanced_autosend">Confirm sending messages</string>
 
     <string name="title_advanced_badge">Show launcher icon with number of new messages</string>
+    <string name="title_advanced_subscriptions">Manage folder subscriptions</string>
     <string name="title_advanced_notify_preview">Show message preview in notifications</string>
     <string name="title_advanced_search_local">External search on device</string>
     <string name="title_advanced_light">Use notification light</string>
@@ -214,6 +215,7 @@
     <string name="title_advanced_threading_hint">Group messages related to each other</string>
     <string name="title_advanced_name_email_hint">When disabled only names will be shown when available</string>
     <string name="title_advanced_flags_hint">Note that starred messages will always be kept locally</string>
+    <string name="title_advanced_subscriptions_hint">Folders not subscribed to will be hidden</string>
     <string name="title_advanced_preview_hint">Only available when message text was downloaded</string>
 
     <string name="title_advanced_autoexpand_hint">Automatically open message when there is just one message or just one unread message in a conversation</string>