Take hidden folders into account for collapsible

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

@@ -76,6 +76,7 @@ public class AdapterFolder extends RecyclerView.Adapter<AdapterFolder.ViewHolder
     private int level;
     private EntityFolder parent;
     private boolean collapsable;
+    private boolean collapsable_hidden;
     private IProperties properties;
     private boolean subscriptions;
     private boolean debug;
@@ -228,12 +229,14 @@ public class AdapterFolder extends RecyclerView.Adapter<AdapterFolder.ViewHolder
 
             ivReadOnly.setVisibility(folder.read_only ? View.VISIBLE : View.GONE);
 
+            boolean folder_collapsible = (show_hidden ? collapsable : collapsable_hidden);
+
             ViewGroup.LayoutParams lp = vwLevel.getLayoutParams();
-            lp.width = (account < 0 || !collapsable ? 1 : level) * dp12;
+            lp.width = (account < 0 || !folder_collapsible ? 1 : level) * dp12;
             vwLevel.setLayoutParams(lp);
 
             ivExpander.setImageLevel(folder.collapsed ? 1 /* more */ : 0 /* less */);
-            ivExpander.setVisibility(account < 0 || !collapsable ? View.GONE : (folder.childs > 0 ? View.VISIBLE : View.INVISIBLE));
+            ivExpander.setVisibility(account < 0 || !folder_collapsible ? View.GONE : (folder.childs > 0 ? View.VISIBLE : View.INVISIBLE));
 
             ivNotify.setVisibility(folder.notify ? View.VISIBLE : View.GONE);
             ivSubscribed.setVisibility(subscriptions && folder.subscribed != null && folder.subscribed ? View.VISIBLE : View.GONE);
@@ -707,14 +710,18 @@ public class AdapterFolder extends RecyclerView.Adapter<AdapterFolder.ViewHolder
 
         if (parent == null) {
             this.collapsable = false;
+            this.collapsable_hidden = false;
             for (TupleFolderEx folder : folders)
                 if (folder.childs > 0) {
                     this.collapsable = true;
+                    this.collapsable_hidden = (folder.childs - folder.hidden_childs > 0);
                     break;
                 }
 
-        } else
+        } else {
             this.collapsable = true;
+            this.collapsable_hidden = true;
+        }
 
         final Collator collator = Collator.getInstance(Locale.getDefault());
         collator.setStrength(Collator.SECONDARY); // Case insensitive, process accents etc

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

@@ -57,6 +57,7 @@ public interface DaoFolder {
             ", SUM(CASE WHEN message.ui_seen = 0 THEN 1 ELSE 0 END) AS unseen" +
             ", (SELECT COUNT(operation.id) FROM operation WHERE operation.folder = folder.id AND operation.state = 'executing') AS executing" +
             ", (SELECT COUNT(child.id) FROM folder child WHERE child.parent = folder.id) AS childs" +
+            ", (SELECT COUNT(child.id) FROM folder child WHERE child.parent = folder.id AND child.hide) AS hidden_childs" +
             " FROM folder" +
             " LEFT JOIN account ON account.id = folder.account" +
             " LEFT JOIN message ON message.folder = folder.id AND NOT message.ui_hide" +
@@ -75,6 +76,7 @@ public interface DaoFolder {
             ", SUM(CASE WHEN message.ui_seen = 0 THEN 1 ELSE 0 END) AS unseen" +
             ", (SELECT COUNT(operation.id) FROM operation WHERE operation.folder = folder.id AND operation.state = 'executing') AS executing" +
             ", (SELECT COUNT(child.id) FROM folder child WHERE child.parent = folder.id) AS childs" +
+            ", (SELECT COUNT(child.id) FROM folder child WHERE child.parent = folder.id AND child.hide) AS hidden_childs" +
             " FROM folder" +
             " JOIN account ON account.id = folder.account" +
             " LEFT JOIN message ON message.folder = folder.id AND NOT message.ui_hide" +
@@ -115,6 +117,7 @@ public interface DaoFolder {
             ", SUM(CASE WHEN message.ui_seen = 0 THEN 1 ELSE 0 END) AS unseen" +
             ", (SELECT COUNT(operation.id) FROM operation WHERE operation.folder = folder.id AND operation.state = 'executing') AS executing" +
             ", (SELECT COUNT(child.id) FROM folder child WHERE child.parent = folder.id) AS childs" +
+            ", (SELECT COUNT(child.id) FROM folder child WHERE child.parent = folder.id AND child.hide) AS hidden_childs" +
             " FROM folder" +
             " LEFT JOIN account ON account.id = folder.account" +
             " LEFT JOIN message ON message.folder = folder.id AND NOT message.ui_hide" +

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

@@ -40,6 +40,7 @@ public class TupleFolderEx extends EntityFolder implements Serializable {
     public int unseen;
     public int executing;
     public int childs;
+    public int hidden_childs;
 
     @Override
     public boolean equals(Object obj) {
@@ -53,7 +54,8 @@ public class TupleFolderEx extends EntityFolder implements Serializable {
                     this.content == other.content &&
                     this.unseen == other.unseen &&
                     this.executing == other.executing &&
-                    this.childs == other.childs);
+                    this.childs == other.childs &&
+                    this.hidden_childs == other.hidden_childs);
         } else
             return false;
     }