Android: Convert CheatsAdapter to Kotlin

2 files changed, 138 insertions, 176 deletions

diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/cheats/ui/CheatsAdapter.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/cheats/ui/CheatsAdapter.java
deleted file mode 100644
index 3335795c75..0000000000
--- a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/cheats/ui/CheatsAdapter.java
+++ /dev/null
@@ -1,176 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-package org.dolphinemu.dolphinemu.features.cheats.ui;
-
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-
-import androidx.annotation.NonNull;
-import androidx.recyclerview.widget.RecyclerView;
-
-import org.dolphinemu.dolphinemu.R;
-import org.dolphinemu.dolphinemu.databinding.ListItemCheatBinding;
-import org.dolphinemu.dolphinemu.databinding.ListItemHeaderBinding;
-import org.dolphinemu.dolphinemu.databinding.ListItemSubmenuBinding;
-import org.dolphinemu.dolphinemu.features.cheats.model.ARCheat;
-import org.dolphinemu.dolphinemu.features.cheats.model.CheatsViewModel;
-import org.dolphinemu.dolphinemu.features.cheats.model.GeckoCheat;
-import org.dolphinemu.dolphinemu.features.cheats.model.GraphicsMod;
-import org.dolphinemu.dolphinemu.features.cheats.model.PatchCheat;
-
-import java.util.ArrayList;
-
-public class CheatsAdapter extends RecyclerView.Adapter<CheatItemViewHolder>
-{
-  private final CheatsActivity mActivity;
-  private final CheatsViewModel mViewModel;
-
-  public CheatsAdapter(CheatsActivity activity, CheatsViewModel viewModel)
-  {
-    mActivity = activity;
-    mViewModel = viewModel;
-
-    mViewModel.getCheatAddedEvent().observe(activity, (position) ->
-    {
-      if (position != null)
-        notifyItemInserted(position);
-    });
-
-    mViewModel.getCheatChangedEvent().observe(activity, (position) ->
-    {
-      if (position != null)
-        notifyItemChanged(position);
-    });
-
-    mViewModel.getCheatDeletedEvent().observe(activity, (position) ->
-    {
-      if (position != null)
-        notifyItemRemoved(position);
-    });
-
-    mViewModel.getGeckoCheatsDownloadedEvent().observe(activity, (cheatsAdded) ->
-    {
-      if (cheatsAdded != null)
-      {
-        int positionEnd = getItemCount() - 2;  // Skip "Add Gecko Code" and "Download Gecko Codes"
-        int positionStart = positionEnd - cheatsAdded;
-        notifyItemRangeInserted(positionStart, cheatsAdded);
-      }
-    });
-  }
-
-  @NonNull
-  @Override
-  public CheatItemViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType)
-  {
-    LayoutInflater inflater = LayoutInflater.from(parent.getContext());
-
-    switch (viewType)
-    {
-      case CheatItem.TYPE_CHEAT:
-        ListItemCheatBinding listItemCheatBinding = ListItemCheatBinding.inflate(inflater);
-        addViewListeners(listItemCheatBinding.getRoot());
-        return new CheatViewHolder(listItemCheatBinding);
-      case CheatItem.TYPE_HEADER:
-        ListItemHeaderBinding listItemHeaderBinding = ListItemHeaderBinding.inflate(inflater);
-        addViewListeners(listItemHeaderBinding.getRoot());
-        return new HeaderViewHolder(listItemHeaderBinding);
-      case CheatItem.TYPE_ACTION:
-        ListItemSubmenuBinding listItemSubmenuBinding = ListItemSubmenuBinding.inflate(inflater);
-        addViewListeners(listItemSubmenuBinding.getRoot());
-        return new ActionViewHolder(listItemSubmenuBinding);
-      default:
-        throw new UnsupportedOperationException();
-    }
-  }
-
-  @Override
-  public void onBindViewHolder(@NonNull CheatItemViewHolder holder, int position)
-  {
-    holder.bind(mActivity, getItemAt(position), position);
-  }
-
-  @Override
-  public int getItemCount()
-  {
-    return mViewModel.getGraphicsMods().size() + mViewModel.getPatchCheats().size() +
-            mViewModel.getARCheats().size() + mViewModel.getGeckoCheats().size() + 8;
-  }
-
-  @Override
-  public int getItemViewType(int position)
-  {
-    return getItemAt(position).getType();
-  }
-
-  private void addViewListeners(View view)
-  {
-    CheatsActivity.setOnFocusChangeListenerRecursively(view,
-            (v, hasFocus) -> mActivity.onListViewFocusChange(hasFocus));
-  }
-
-  private CheatItem getItemAt(int position)
-  {
-    // Graphics mods
-
-    if (position == 0)
-      return new CheatItem(CheatItem.TYPE_HEADER, R.string.cheats_header_graphics_mod);
-    position -= 1;
-
-    ArrayList<GraphicsMod> graphicsMods = mViewModel.getGraphicsMods();
-    if (position < graphicsMods.size())
-      return new CheatItem(graphicsMods.get(position));
-    position -= graphicsMods.size();
-
-    // Patches
-
-    if (position == 0)
-      return new CheatItem(CheatItem.TYPE_HEADER, R.string.cheats_header_patch);
-    position -= 1;
-
-    ArrayList<PatchCheat> patchCheats = mViewModel.getPatchCheats();
-    if (position < patchCheats.size())
-      return new CheatItem(patchCheats.get(position));
-    position -= patchCheats.size();
-
-    if (position == 0)
-      return new CheatItem(CheatItem.TYPE_ACTION, R.string.cheats_add_patch);
-    position -= 1;
-
-    // AR codes
-
-    if (position == 0)
-      return new CheatItem(CheatItem.TYPE_HEADER, R.string.cheats_header_ar);
-    position -= 1;
-
-    ArrayList<ARCheat> arCheats = mViewModel.getARCheats();
-    if (position < arCheats.size())
-      return new CheatItem(arCheats.get(position));
-    position -= arCheats.size();
-
-    if (position == 0)
-      return new CheatItem(CheatItem.TYPE_ACTION, R.string.cheats_add_ar);
-    position -= 1;
-
-    // Gecko codes
-
-    if (position == 0)
-      return new CheatItem(CheatItem.TYPE_HEADER, R.string.cheats_header_gecko);
-    position -= 1;
-
-    ArrayList<GeckoCheat> geckoCheats = mViewModel.getGeckoCheats();
-    if (position < geckoCheats.size())
-      return new CheatItem(geckoCheats.get(position));
-    position -= geckoCheats.size();
-
-    if (position == 0)
-      return new CheatItem(CheatItem.TYPE_ACTION, R.string.cheats_add_gecko);
-    position -= 1;
-
-    if (position == 0)
-      return new CheatItem(CheatItem.TYPE_ACTION, R.string.cheats_download_gecko);
-
-    throw new IndexOutOfBoundsException();
-  }
-}
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/cheats/ui/CheatsAdapter.kt b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/cheats/ui/CheatsAdapter.kt
new file mode 100644
index 0000000000..c75330375d
--- /dev/null
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/cheats/ui/CheatsAdapter.kt
@@ -0,0 +1,138 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package org.dolphinemu.dolphinemu.features.cheats.ui
+
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.recyclerview.widget.RecyclerView
+import org.dolphinemu.dolphinemu.R
+import org.dolphinemu.dolphinemu.databinding.ListItemCheatBinding
+import org.dolphinemu.dolphinemu.databinding.ListItemHeaderBinding
+import org.dolphinemu.dolphinemu.databinding.ListItemSubmenuBinding
+import org.dolphinemu.dolphinemu.features.cheats.model.CheatsViewModel
+import org.dolphinemu.dolphinemu.features.cheats.ui.CheatsActivity.Companion.setOnFocusChangeListenerRecursively
+
+class CheatsAdapter(
+    private val activity: CheatsActivity,
+    private val viewModel: CheatsViewModel
+) : RecyclerView.Adapter<CheatItemViewHolder>() {
+    init {
+        viewModel.cheatAddedEvent.observe(activity) { position: Int? ->
+            position?.let { notifyItemInserted(it) }
+        }
+
+        viewModel.cheatChangedEvent.observe(activity) { position: Int? ->
+            position?.let { notifyItemChanged(it) }
+        }
+
+        viewModel.cheatDeletedEvent.observe(activity) { position: Int? ->
+            position?.let { notifyItemRemoved(it) }
+        }
+
+        viewModel.geckoCheatsDownloadedEvent.observe(activity) { cheatsAdded: Int? ->
+            cheatsAdded?.let {
+                val positionEnd = itemCount - 2 // Skip "Add Gecko Code" and "Download Gecko Codes"
+                val positionStart = positionEnd - it
+                notifyItemRangeInserted(positionStart, it)
+            }
+        }
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): CheatItemViewHolder {
+        val inflater = LayoutInflater.from(parent.context)
+        return when (viewType) {
+            CheatItem.TYPE_CHEAT -> {
+                val listItemCheatBinding = ListItemCheatBinding.inflate(inflater)
+                addViewListeners(listItemCheatBinding.getRoot())
+                CheatViewHolder(listItemCheatBinding)
+            }
+            CheatItem.TYPE_HEADER -> {
+                val listItemHeaderBinding = ListItemHeaderBinding.inflate(inflater)
+                addViewListeners(listItemHeaderBinding.root)
+                HeaderViewHolder(listItemHeaderBinding)
+            }
+            CheatItem.TYPE_ACTION -> {
+                val listItemSubmenuBinding = ListItemSubmenuBinding.inflate(inflater)
+                addViewListeners(listItemSubmenuBinding.root)
+                ActionViewHolder(listItemSubmenuBinding)
+            }
+            else -> throw UnsupportedOperationException()
+        }
+    }
+
+    override fun onBindViewHolder(holder: CheatItemViewHolder, position: Int) {
+        holder.bind(activity, getItemAt(position), position)
+    }
+
+    override fun getItemCount(): Int {
+        return viewModel.graphicsMods.size + viewModel.patchCheats.size + viewModel.aRCheats.size +
+                viewModel.geckoCheats.size + 8
+    }
+
+    override fun getItemViewType(position: Int): Int {
+        return getItemAt(position).type
+    }
+
+    private fun addViewListeners(view: View) {
+        setOnFocusChangeListenerRecursively(view) { _: View?, hasFocus: Boolean ->
+            activity.onListViewFocusChange(
+                hasFocus
+            )
+        }
+    }
+
+    private fun getItemAt(position: Int): CheatItem {
+        // Graphics mods
+        var itemPosition = position
+        if (itemPosition == 0) return CheatItem(
+            CheatItem.TYPE_HEADER,
+            R.string.cheats_header_graphics_mod
+        )
+        itemPosition -= 1
+
+        val graphicsMods = viewModel.graphicsMods
+        if (itemPosition < graphicsMods.size) return CheatItem(graphicsMods[itemPosition])
+        itemPosition -= graphicsMods.size
+
+        // Patches
+        if (itemPosition == 0) return CheatItem(CheatItem.TYPE_HEADER, R.string.cheats_header_patch)
+        itemPosition -= 1
+
+        val patchCheats = viewModel.patchCheats
+        if (itemPosition < patchCheats.size) return CheatItem(patchCheats[itemPosition])
+        itemPosition -= patchCheats.size
+
+        if (itemPosition == 0) return CheatItem(CheatItem.TYPE_ACTION, R.string.cheats_add_patch)
+        itemPosition -= 1
+
+        // AR codes
+        if (itemPosition == 0) return CheatItem(CheatItem.TYPE_HEADER, R.string.cheats_header_ar)
+        itemPosition -= 1
+
+        val arCheats = viewModel.aRCheats
+        if (itemPosition < arCheats.size) return CheatItem(arCheats[itemPosition])
+        itemPosition -= arCheats.size
+
+        if (itemPosition == 0) return CheatItem(CheatItem.TYPE_ACTION, R.string.cheats_add_ar)
+        itemPosition -= 1
+
+        // Gecko codes
+        if (itemPosition == 0) return CheatItem(CheatItem.TYPE_HEADER, R.string.cheats_header_gecko)
+        itemPosition -= 1
+
+        val geckoCheats = viewModel.geckoCheats
+        if (itemPosition < geckoCheats.size) return CheatItem(geckoCheats[itemPosition])
+        itemPosition -= geckoCheats.size
+
+        if (itemPosition == 0) return CheatItem(CheatItem.TYPE_ACTION, R.string.cheats_add_gecko)
+        itemPosition -= 1
+
+        if (itemPosition == 0) return CheatItem(
+            CheatItem.TYPE_ACTION,
+            R.string.cheats_download_gecko
+        )
+
+        throw IndexOutOfBoundsException()
+    }
+}