Revert "lineage-sdk self-removing prefs: move reap from onBindViewHolder to onAttached"

This reverts commit 027b615325.

While it served its original purpose, this was causing bad side-effects
when using our constraints (verified at least with requiresConfig and
requiresAction). Moving the reap to onAttached was rendering self-removing
prefs useless because if the view isn't loaded yet, the preference
(which also doesn't yet exists) can't really be hidden.

Change-Id: Ic61fe4b9979412d89c55ea1543c494e69bf6eab7

sdk/src/java/lineageos/preference/ConstraintsHelper.java

@@ -300,7 +300,7 @@ public class ConstraintsHelper {
         return fallbackAttr;
     }
 
-    public void onAttached() {
+    public void onBindViewHolder(PreferenceViewHolder holder) {
         checkIntent();
 
         if (isAvailable() && mReplacesKey != null) {
@@ -308,9 +308,7 @@ public class ConstraintsHelper {
         }
 
         Graveyard.get(mContext).summonReaper(mPref.getPreferenceManager());
-    }
 
-    public void onBindViewHolder(PreferenceViewHolder holder) {
         if (!isAvailable()) {
             return;
         }
@@ -327,7 +325,7 @@ public class ConstraintsHelper {
      * If we want to keep this at the preference level vs the fragment level, we need to
      * collate all the preferences that need to be removed when attached to the
      * hierarchy, then purge them all when loading is complete. The Graveyard keeps track
-     * of this, and will reap the dead when onAttached is called.
+     * of this, and will reap the dead during the first call to onBindViewHolder.
      */
     private static class Graveyard {
 
@@ -372,12 +370,20 @@ public class ConstraintsHelper {
             return null;
         }
 
+        private void removePreference(PreferenceManager mgr, Preference pref) {
+            final PreferenceGroup group = getParent(pref, pref);
+            group.removePreference(pref);
+            if (group.getPreferenceCount() == 0) {
+                getParent(pref, group).removePreference(group);
+            }
+        }
+
         public void summonReaper(PreferenceManager mgr) {
             synchronized (mDeathRow) {
                 for (String dead : mDeathRow) {
                     Preference deadPref = mgr.findPreference(dead);
                     if (deadPref != null) {
-                        deadPref.setVisible(false);
+                        removePreference(mgr, deadPref);
                     }
                 }
                 mDeathRow.clear();

sdk/src/java/lineageos/preference/SelfRemovingDropDownPreference.java

@@ -43,12 +43,6 @@ public class SelfRemovingDropDownPreference extends DropDownPreference {
         mConstraints = new ConstraintsHelper(context, null, this);
     }
 
-    @Override
-    public void onAttached() {
-        super.onAttached();
-        mConstraints.onAttached();
-    }
-
     @Override
     public void onBindViewHolder(PreferenceViewHolder holder) {
         super.onBindViewHolder(holder);

sdk/src/java/lineageos/preference/SelfRemovingListPreference.java

@@ -43,12 +43,6 @@ public class SelfRemovingListPreference extends ListPreference {
         mConstraints = new ConstraintsHelper(context, null, this);
     }
 
-    @Override
-    public void onAttached() {
-        super.onAttached();
-        mConstraints.onAttached();
-    }
-
     @Override
     public void onBindViewHolder(PreferenceViewHolder holder) {
         super.onBindViewHolder(holder);

sdk/src/java/lineageos/preference/SelfRemovingPreference.java

@@ -48,12 +48,6 @@ public class SelfRemovingPreference extends Preference {
         this(context, null);
     }
 
-    @Override
-    public void onAttached() {
-        super.onAttached();
-        mConstraints.onAttached();
-    }
-
     @Override
     public void onBindViewHolder(PreferenceViewHolder holder) {
         super.onBindViewHolder(holder);

sdk/src/java/lineageos/preference/SelfRemovingSwitchPreference.java

@@ -43,12 +43,6 @@ public class SelfRemovingSwitchPreference extends SwitchPreference {
         mConstraints = new ConstraintsHelper(context, null, this);
     }
 
-    @Override
-    public void onAttached() {
-        super.onAttached();
-        mConstraints.onAttached();
-    }
-
     @Override
     public void onBindViewHolder(PreferenceViewHolder holder) {
         super.onBindViewHolder(holder);