diff options
Diffstat (limited to 'src/android/app/src/main/java/org/yuzu/yuzu_emu/adapters/GameAdapter.java')
| -rw-r--r-- | src/android/app/src/main/java/org/yuzu/yuzu_emu/adapters/GameAdapter.java | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/src/android/app/src/main/java/org/yuzu/yuzu_emu/adapters/GameAdapter.java b/src/android/app/src/main/java/org/yuzu/yuzu_emu/adapters/GameAdapter.java new file mode 100644 index 000000000..fa785741b --- /dev/null +++ b/src/android/app/src/main/java/org/yuzu/yuzu_emu/adapters/GameAdapter.java @@ -0,0 +1,247 @@ +package org.yuzu.yuzu_emu.adapters; + +import android.database.Cursor; +import android.database.DataSetObserver; +import android.graphics.Rect; +import android.graphics.drawable.Drawable; +import android.os.Build; +import android.os.SystemClock; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; + +import androidx.annotation.NonNull; +import androidx.annotation.RequiresApi; +import androidx.core.content.ContextCompat; +import androidx.fragment.app.FragmentActivity; +import androidx.recyclerview.widget.RecyclerView; + +import org.yuzu.yuzu_emu.R; +import org.yuzu.yuzu_emu.activities.EmulationActivity; +import org.yuzu.yuzu_emu.model.GameDatabase; +import org.yuzu.yuzu_emu.ui.DividerItemDecoration; +import org.yuzu.yuzu_emu.utils.Log; +import org.yuzu.yuzu_emu.utils.PicassoUtils; +import org.yuzu.yuzu_emu.viewholders.GameViewHolder; + +import java.nio.file.Path; +import java.nio.file.Paths; +import java.util.stream.Stream; + +/** + * This adapter gets its information from a database Cursor. This fact, paired with the usage of + * ContentProviders and Loaders, allows for efficient display of a limited view into a (possibly) + * large dataset. + */ +public final class GameAdapter extends RecyclerView.Adapter<GameViewHolder> implements + View.OnClickListener { + private Cursor mCursor; + private GameDataSetObserver mObserver; + + private boolean mDatasetValid; + private long mLastClickTime = 0; + + /** + * Initializes the adapter's observer, which watches for changes to the dataset. The adapter will + * display no data until a Cursor is supplied by a CursorLoader. + */ + public GameAdapter() { + mDatasetValid = false; + mObserver = new GameDataSetObserver(); + } + + /** + * Called by the LayoutManager when it is necessary to create a new view. + * + * @param parent The RecyclerView (I think?) the created view will be thrown into. + * @param viewType Not used here, but useful when more than one type of child will be used in the RecyclerView. + * @return The created ViewHolder with references to all the child view's members. + */ + @Override + public GameViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { + // Create a new view. + View gameCard = LayoutInflater.from(parent.getContext()) + .inflate(R.layout.card_game, parent, false); + + gameCard.setOnClickListener(this); + + // Use that view to create a ViewHolder. + return new GameViewHolder(gameCard); + } + + /** + * Called by the LayoutManager when a new view is not necessary because we can recycle + * an existing one (for example, if a view just scrolled onto the screen from the bottom, we + * can use the view that just scrolled off the top instead of inflating a new one.) + * + * @param holder A ViewHolder representing the view we're recycling. + * @param position The position of the 'new' view in the dataset. + */ + @RequiresApi(api = Build.VERSION_CODES.O) + @Override + public void onBindViewHolder(@NonNull GameViewHolder holder, int position) { + if (mDatasetValid) { + if (mCursor.moveToPosition(position)) { + PicassoUtils.loadGameIcon(holder.imageIcon, + mCursor.getString(GameDatabase.GAME_COLUMN_PATH)); + + holder.textGameTitle.setText(mCursor.getString(GameDatabase.GAME_COLUMN_TITLE).replaceAll("[\\t\\n\\r]+", " ")); + holder.textCompany.setText(mCursor.getString(GameDatabase.GAME_COLUMN_COMPANY)); + + final Path gamePath = Paths.get(mCursor.getString(GameDatabase.GAME_COLUMN_PATH)); + holder.textFileName.setText(gamePath.getFileName().toString()); + + // TODO These shouldn't be necessary once the move to a DB-based model is complete. + holder.gameId = mCursor.getString(GameDatabase.GAME_COLUMN_GAME_ID); + holder.path = mCursor.getString(GameDatabase.GAME_COLUMN_PATH); + holder.title = mCursor.getString(GameDatabase.GAME_COLUMN_TITLE); + holder.description = mCursor.getString(GameDatabase.GAME_COLUMN_DESCRIPTION); + holder.regions = mCursor.getString(GameDatabase.GAME_COLUMN_REGIONS); + holder.company = mCursor.getString(GameDatabase.GAME_COLUMN_COMPANY); + + final int backgroundColorId = isValidGame(holder.path) ? R.color.view_background : R.color.view_disabled; + View itemView = holder.getItemView(); + itemView.setBackgroundColor(ContextCompat.getColor(itemView.getContext(), backgroundColorId)); + } else { + Log.error("[GameAdapter] Can't bind view; Cursor is not valid."); + } + } else { + Log.error("[GameAdapter] Can't bind view; dataset is not valid."); + } + } + + /** + * Called by the LayoutManager to find out how much data we have. + * + * @return Size of the dataset. + */ + @Override + public int getItemCount() { + if (mDatasetValid && mCursor != null) { + return mCursor.getCount(); + } + Log.error("[GameAdapter] Dataset is not valid."); + return 0; + } + + /** + * Return the contents of the _id column for a given row. + * + * @param position The row for which Android wants an ID. + * @return A valid ID from the database, or 0 if not available. + */ + @Override + public long getItemId(int position) { + if (mDatasetValid && mCursor != null) { + if (mCursor.moveToPosition(position)) { + return mCursor.getLong(GameDatabase.COLUMN_DB_ID); + } + } + + Log.error("[GameAdapter] Dataset is not valid."); + return 0; + } + + /** + * Tell Android whether or not each item in the dataset has a stable identifier. + * Which it does, because it's a database, so always tell Android 'true'. + * + * @param hasStableIds ignored. + */ + @Override + public void setHasStableIds(boolean hasStableIds) { + super.setHasStableIds(true); + } + + /** + * When a load is finished, call this to replace the existing data with the newly-loaded + * data. + * + * @param cursor The newly-loaded Cursor. + */ + public void swapCursor(Cursor cursor) { + // Sanity check. + if (cursor == mCursor) { + return; + } + + // Before getting rid of the old cursor, disassociate it from the Observer. + final Cursor oldCursor = mCursor; + if (oldCursor != null && mObserver != null) { + oldCursor.unregisterDataSetObserver(mObserver); + } + + mCursor = cursor; + if (mCursor != null) { + // Attempt to associate the new Cursor with the Observer. + if (mObserver != null) { + mCursor.registerDataSetObserver(mObserver); + } + + mDatasetValid = true; + } else { + mDatasetValid = false; + } + + notifyDataSetChanged(); + } + + /** + * Launches the game that was clicked on. + * + * @param view The card representing the game the user wants to play. + */ + @Override + public void onClick(View view) { + // Double-click prevention, using threshold of 1000 ms + if (SystemClock.elapsedRealtime() - mLastClickTime < 1000) { + return; + } + mLastClickTime = SystemClock.elapsedRealtime(); + + GameViewHolder holder = (GameViewHolder) view.getTag(); + + EmulationActivity.launch((FragmentActivity) view.getContext(), holder.path, holder.title); + } + + public static class SpacesItemDecoration extends DividerItemDecoration { + private int space; + + public SpacesItemDecoration(Drawable divider, int space) { + super(divider); + this.space = space; + } + + @Override + public void getItemOffsets(Rect outRect, @NonNull View view, @NonNull RecyclerView parent, + @NonNull RecyclerView.State state) { + outRect.left = 0; + outRect.right = 0; + outRect.bottom = space; + outRect.top = 0; + } + } + + private boolean isValidGame(String path) { + return Stream.of( + ".rar", ".zip", ".7z", ".torrent", ".tar", ".gz").noneMatch(suffix -> path.toLowerCase().endsWith(suffix)); + } + + private final class GameDataSetObserver extends DataSetObserver { + @Override + public void onChanged() { + super.onChanged(); + + mDatasetValid = true; + notifyDataSetChanged(); + } + + @Override + public void onInvalidated() { + super.onInvalidated(); + + mDatasetValid = false; + notifyDataSetChanged(); + } + } +} |