Android: Long press a setting to reset it

This is particularly important for game INIs, where a setting being
unset is not the same as it being set to the default value.

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/model/view/SettingsItem.java

@@ -77,4 +77,14 @@ public abstract class SettingsItem
     AbstractSetting setting = getSetting();
     return setting != null && setting.isRuntimeEditable();
   }
+
+  public boolean hasSetting()
+  {
+    return getSetting() != null;
+  }
+
+  public void clear(Settings settings)
+  {
+    getSetting().delete(settings);
+  }
 }

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/SettingsAdapter.java

@@ -160,6 +160,14 @@ public final class SettingsAdapter extends RecyclerView.Adapter<SettingViewHolde
     notifyDataSetChanged();
   }
 
+  public void clearSetting(SettingsItem item, int position)
+  {
+    item.clear(getSettings());
+    notifyItemChanged(position);
+
+    mView.onSettingChanged();
+  }
+
   public void onBooleanClick(CheckBoxSetting item, int position, boolean checked)
   {
     item.setChecked(getSettings(), checked);

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/SettingsFragmentPresenter.java

@@ -225,6 +225,7 @@ public final class SettingsFragmentPresenter
     sl.add(new SubmenuSetting(R.string.advanced_submenu, MenuTag.CONFIG_ADVANCED));
     sl.add(new SubmenuSetting(R.string.log_submenu, MenuTag.CONFIG_LOG));
     sl.add(new SubmenuSetting(R.string.debug_submenu, MenuTag.DEBUG));
+    sl.add(new HeaderSetting(R.string.setting_clear_info, 0));
   }
 
   private void addGeneralSettings(ArrayList<SettingsItem> sl)
@@ -493,6 +494,7 @@ public final class SettingsFragmentPresenter
     sl.add(new HeaderSetting(R.string.graphics_enhancements_and_hacks, 0));
     sl.add(new SubmenuSetting(R.string.enhancements_submenu, MenuTag.ENHANCEMENTS));
     sl.add(new SubmenuSetting(R.string.hacks_submenu, MenuTag.HACKS));
+    sl.add(new HeaderSetting(R.string.setting_clear_info, 0));
   }
 
   private void addEnhanceSettings(ArrayList<SettingsItem> sl)

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/viewholder/CheckBoxSettingViewHolder.java

@@ -4,6 +4,8 @@ import android.view.View;
 import android.widget.CheckBox;
 import android.widget.TextView;
 
+import androidx.annotation.Nullable;
+
 import org.dolphinemu.dolphinemu.R;
 import org.dolphinemu.dolphinemu.features.settings.model.view.CheckBoxSetting;
 import org.dolphinemu.dolphinemu.features.settings.model.view.LogCheckBoxSetting;
@@ -78,4 +80,10 @@ public final class CheckBoxSettingViewHolder extends SettingViewHolder
 
     setStyle(mTextSettingName, mItem);
   }
+
+  @Nullable @Override
+  protected SettingsItem getItem()
+  {
+    return mItem;
+  }
 }

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/viewholder/FilePickerViewHolder.java

@@ -4,6 +4,8 @@ import android.text.TextUtils;
 import android.view.View;
 import android.widget.TextView;
 
+import androidx.annotation.Nullable;
+
 import org.dolphinemu.dolphinemu.R;
 import org.dolphinemu.dolphinemu.features.settings.model.view.FilePicker;
 import org.dolphinemu.dolphinemu.features.settings.model.view.SettingsItem;
@@ -82,4 +84,10 @@ public final class FilePickerViewHolder extends SettingViewHolder
 
     setStyle(mTextSettingName, mItem);
   }
+
+  @Nullable @Override
+  protected SettingsItem getItem()
+  {
+    return mItem;
+  }
 }

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/viewholder/HeaderViewHolder.java

@@ -3,6 +3,8 @@ package org.dolphinemu.dolphinemu.features.settings.ui.viewholder;
 import android.view.View;
 import android.widget.TextView;
 
+import androidx.annotation.Nullable;
+
 import org.dolphinemu.dolphinemu.R;
 import org.dolphinemu.dolphinemu.features.settings.model.view.SettingsItem;
 import org.dolphinemu.dolphinemu.features.settings.ui.SettingsAdapter;
@@ -34,4 +36,10 @@ public final class HeaderViewHolder extends SettingViewHolder
   {
     // no-op
   }
+
+  @Nullable @Override
+  protected SettingsItem getItem()
+  {
+    return null;
+  }
 }

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/viewholder/InputBindingSettingViewHolder.java

@@ -6,6 +6,8 @@ import android.preference.PreferenceManager;
 import android.view.View;
 import android.widget.TextView;
 
+import androidx.annotation.Nullable;
+
 import org.dolphinemu.dolphinemu.R;
 import org.dolphinemu.dolphinemu.features.settings.model.view.InputBindingSetting;
 import org.dolphinemu.dolphinemu.features.settings.model.view.SettingsItem;
@@ -61,4 +63,10 @@ public final class InputBindingSettingViewHolder extends SettingViewHolder
 
     setStyle(mTextSettingName, mItem);
   }
+
+  @Nullable @Override
+  protected SettingsItem getItem()
+  {
+    return mItem;
+  }
 }

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/viewholder/RumbleBindingViewHolder.java

@@ -6,6 +6,8 @@ import android.preference.PreferenceManager;
 import android.view.View;
 import android.widget.TextView;
 
+import androidx.annotation.Nullable;
+
 import org.dolphinemu.dolphinemu.R;
 import org.dolphinemu.dolphinemu.features.settings.model.view.RumbleBindingSetting;
 import org.dolphinemu.dolphinemu.features.settings.model.view.SettingsItem;
@@ -61,4 +63,10 @@ public class RumbleBindingViewHolder extends SettingViewHolder
 
     setStyle(mTextSettingName, mItem);
   }
+
+  @Nullable @Override
+  protected SettingsItem getItem()
+  {
+    return mItem;
+  }
 }

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/viewholder/RunRunnableViewHolder.java

@@ -5,6 +5,7 @@ import android.view.View;
 import android.widget.TextView;
 import android.widget.Toast;
 
+import androidx.annotation.Nullable;
 import androidx.appcompat.app.AlertDialog;
 
 import org.dolphinemu.dolphinemu.R;
@@ -56,8 +57,8 @@ public final class RunRunnableViewHolder extends SettingViewHolder
     if (alertTextID > 0)
     {
       AlertDialog.Builder builder = new AlertDialog.Builder(mContext, R.style.DolphinDialogBase)
-              .setTitle(mContext.getString(mItem.getNameId()))
+              .setTitle(mItem.getNameId())
-              .setMessage(mContext.getString(alertTextID));
+              .setMessage(alertTextID);
 
       builder
               .setPositiveButton(R.string.ok, (dialog, whichButton) ->
@@ -75,6 +76,12 @@ public final class RunRunnableViewHolder extends SettingViewHolder
     }
   }
 
+  @Nullable @Override
+  protected SettingsItem getItem()
+  {
+    return mItem;
+  }
+
   private void runRunnable()
   {
     mItem.getRunnable().run();

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/viewholder/SettingViewHolder.java

@@ -1,12 +1,14 @@
 package org.dolphinemu.dolphinemu.features.settings.ui.viewholder;
 
-
+import android.content.Context;
 import android.graphics.Paint;
 import android.graphics.Typeface;
 import android.view.View;
 import android.widget.TextView;
 import android.widget.Toast;
 
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AlertDialog;
 import androidx.recyclerview.widget.RecyclerView;
 
 import org.dolphinemu.dolphinemu.DolphinApplication;
@@ -15,7 +17,7 @@ import org.dolphinemu.dolphinemu.features.settings.model.view.SettingsItem;
 import org.dolphinemu.dolphinemu.features.settings.ui.SettingsAdapter;
 
 public abstract class SettingViewHolder extends RecyclerView.ViewHolder
-        implements View.OnClickListener
+        implements View.OnClickListener, View.OnLongClickListener
 {
   private SettingsAdapter mAdapter;
 
@@ -26,6 +28,7 @@ public abstract class SettingViewHolder extends RecyclerView.ViewHolder
     mAdapter = adapter;
 
     itemView.setOnClickListener(this);
+    itemView.setOnLongClickListener(this);
 
     findViews(itemView);
   }
@@ -72,4 +75,40 @@ public abstract class SettingViewHolder extends RecyclerView.ViewHolder
    * @param clicked The view that was clicked on.
    */
   public abstract void onClick(View clicked);
+
+  @Nullable
+  protected abstract SettingsItem getItem();
+
+  public boolean onLongClick(View clicked)
+  {
+    SettingsItem item = getItem();
+
+    if (item == null || !item.hasSetting())
+      return false;
+
+    if (!item.isEditable())
+    {
+      showNotRuntimeEditableError();
+      return true;
+    }
+
+    Context context = clicked.getContext();
+
+    AlertDialog.Builder builder = new AlertDialog.Builder(context, R.style.DolphinDialogBase)
+            .setMessage(R.string.setting_clear_confirm);
+
+    builder
+            .setPositiveButton(R.string.ok, (dialog, whichButton) ->
+            {
+              getAdapter().clearSetting(item, getAdapterPosition());
+              bind(item);
+              Toast.makeText(context, R.string.setting_cleared, Toast.LENGTH_SHORT).show();
+              dialog.dismiss();
+            })
+            .setNegativeButton(R.string.cancel, (dialog, whichButton) -> dialog.dismiss());
+
+    builder.show();
+
+    return true;
+  }
 }

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/viewholder/SingleChoiceViewHolder.java

@@ -4,6 +4,8 @@ import android.content.res.Resources;
 import android.view.View;
 import android.widget.TextView;
 
+import androidx.annotation.Nullable;
+
 import org.dolphinemu.dolphinemu.R;
 import org.dolphinemu.dolphinemu.features.settings.model.view.SettingsItem;
 import org.dolphinemu.dolphinemu.features.settings.model.view.SingleChoiceSetting;
@@ -110,4 +112,10 @@ public final class SingleChoiceViewHolder extends SettingViewHolder
 
     setStyle(mTextSettingName, mItem);
   }
+
+  @Nullable @Override
+  protected SettingsItem getItem()
+  {
+    return mItem;
+  }
 }

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/viewholder/SliderViewHolder.java

@@ -4,6 +4,8 @@ import android.content.Context;
 import android.view.View;
 import android.widget.TextView;
 
+import androidx.annotation.Nullable;
+
 import org.dolphinemu.dolphinemu.R;
 import org.dolphinemu.dolphinemu.features.settings.model.view.SettingsItem;
 import org.dolphinemu.dolphinemu.features.settings.model.view.SliderSetting;
@@ -66,5 +68,11 @@ public final class SliderViewHolder extends SettingViewHolder
 
     setStyle(mTextSettingName, mItem);
   }
+
+  @Nullable @Override
+  protected SettingsItem getItem()
+  {
+    return mItem;
+  }
 }
 

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/viewholder/SubmenuViewHolder.java

@@ -3,6 +3,8 @@ package org.dolphinemu.dolphinemu.features.settings.ui.viewholder;
 import android.view.View;
 import android.widget.TextView;
 
+import androidx.annotation.Nullable;
+
 import org.dolphinemu.dolphinemu.R;
 import org.dolphinemu.dolphinemu.features.settings.model.view.SettingsItem;
 import org.dolphinemu.dolphinemu.features.settings.model.view.SubmenuSetting;
@@ -38,4 +40,10 @@ public final class SubmenuViewHolder extends SettingViewHolder
   {
     getAdapter().onSubmenuClick(mItem);
   }
+
+  @Nullable @Override
+  protected SettingsItem getItem()
+  {
+    return mItem;
+  }
 }

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

@@ -418,6 +418,9 @@ It can efficiently compress both junk data and encrypted Wii data.
     <string name="write_permission_needed">You need to allow write access to external storage for the emulator to work</string>
     <string name="load_settings">Loading Settings...</string>
     <string name="setting_not_runtime_editable">This setting can\'t be changed while a game is running.</string>
+    <string name="setting_clear_info">Long press a setting to clear it.</string>
+    <string name="setting_clear_confirm">Do you want to restore this setting to its default value?</string>
+    <string name="setting_cleared">Setting cleared</string>
     <string name="emulation_change_disc">Change Disc</string>
 
     <string name="external_storage_not_mounted">The external storage needs to be available in order to use Dolphin</string>