diff options
Diffstat (limited to 'src/android/app/src/main/java/org/yuzu/yuzu_emu/adapters/GameAdapter.kt')
| -rw-r--r-- | src/android/app/src/main/java/org/yuzu/yuzu_emu/adapters/GameAdapter.kt | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/src/android/app/src/main/java/org/yuzu/yuzu_emu/adapters/GameAdapter.kt b/src/android/app/src/main/java/org/yuzu/yuzu_emu/adapters/GameAdapter.kt new file mode 100644 index 000000000..b3761166d --- /dev/null +++ b/src/android/app/src/main/java/org/yuzu/yuzu_emu/adapters/GameAdapter.kt @@ -0,0 +1,178 @@ +package org.yuzu.yuzu_emu.adapters + +import android.database.Cursor +import android.database.DataSetObserver +import android.view.LayoutInflater +import android.view.View +import android.view.ViewGroup +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.Companion.launch +import org.yuzu.yuzu_emu.model.GameDatabase +import org.yuzu.yuzu_emu.utils.Log +import org.yuzu.yuzu_emu.utils.PicassoUtils +import org.yuzu.yuzu_emu.viewholders.GameViewHolder +import java.util.* +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. + */ +class GameAdapter : RecyclerView.Adapter<GameViewHolder>(), View.OnClickListener { + private var cursor: Cursor? = null + private val observer: GameDataSetObserver? + private var isDatasetValid = false + + /** + * 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. + */ + init { + observer = GameDataSetObserver() + } + + override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): GameViewHolder { + // Create a new view. + val gameCard = LayoutInflater.from(parent.context) + .inflate(R.layout.card_game, parent, false) + gameCard.setOnClickListener(this) + + // Use that view to create a ViewHolder. + return GameViewHolder(gameCard) + } + + override fun onBindViewHolder(holder: GameViewHolder, position: Int) { + if (isDatasetValid) { + if (cursor!!.moveToPosition(position)) { + PicassoUtils.loadGameIcon( + holder.imageIcon, + cursor!!.getString(GameDatabase.GAME_COLUMN_PATH) + ) + holder.textGameTitle.text = + cursor!!.getString(GameDatabase.GAME_COLUMN_TITLE) + .replace("[\\t\\n\\r]+".toRegex(), " ") + holder.textGameCaption.text = cursor!!.getString(GameDatabase.GAME_COLUMN_CAPTION) + + // TODO These shouldn't be necessary once the move to a DB-based model is complete. + holder.gameId = cursor!!.getString(GameDatabase.GAME_COLUMN_GAME_ID) + holder.path = cursor!!.getString(GameDatabase.GAME_COLUMN_PATH) + holder.title = cursor!!.getString(GameDatabase.GAME_COLUMN_TITLE) + holder.description = cursor!!.getString(GameDatabase.GAME_COLUMN_DESCRIPTION) + holder.regions = cursor!!.getString(GameDatabase.GAME_COLUMN_REGIONS) + holder.company = cursor!!.getString(GameDatabase.GAME_COLUMN_CAPTION) + val backgroundColorId = + if (isValidGame(holder.path!!)) R.color.view_background else R.color.view_disabled + val itemView = holder.itemView + itemView.setBackgroundColor( + ContextCompat.getColor( + itemView.context, + 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.") + } + } + + override fun getItemCount(): Int { + if (isDatasetValid && cursor != null) { + return cursor!!.count + } + 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 fun getItemId(position: Int): Long { + if (isDatasetValid && cursor != null) { + if (cursor!!.moveToPosition(position)) { + return cursor!!.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 fun setHasStableIds(hasStableIds: Boolean) { + 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. + */ + fun swapCursor(cursor: Cursor) { + // Sanity check. + if (cursor === this.cursor) { + return + } + + // Before getting rid of the old cursor, disassociate it from the Observer. + val oldCursor = this.cursor + if (oldCursor != null && observer != null) { + oldCursor.unregisterDataSetObserver(observer) + } + this.cursor = cursor + isDatasetValid = if (this.cursor != null) { + // Attempt to associate the new Cursor with the Observer. + if (observer != null) { + this.cursor!!.registerDataSetObserver(observer) + } + true + } else { + false + } + notifyDataSetChanged() + } + + /** + * Launches the game that was clicked on. + * + * @param view The card representing the game the user wants to play. + */ + override fun onClick(view: View) { + val holder = view.tag as GameViewHolder + launch((view.context as FragmentActivity), holder.path, holder.title) + } + + private fun isValidGame(path: String): Boolean { + return Stream.of(".rar", ".zip", ".7z", ".torrent", ".tar", ".gz") + .noneMatch { suffix: String? -> + path.lowercase(Locale.getDefault()).endsWith(suffix!!) + } + } + + private inner class GameDataSetObserver : DataSetObserver() { + override fun onChanged() { + super.onChanged() + isDatasetValid = true + notifyDataSetChanged() + } + + override fun onInvalidated() { + super.onInvalidated() + isDatasetValid = false + notifyDataSetChanged() + } + } +} |