Add conversation media photo rail to recipient preferences

// FREEBIE

src/org/thoughtcrime/securesms/components/ThreadPhotoRailView.java

@@ -0,0 +1,129 @@
+package org.thoughtcrime.securesms.components;
+
+
+import android.content.Context;
+import android.database.Cursor;
+import android.os.Bundle;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.support.v4.app.LoaderManager;
+import android.support.v4.content.Loader;
+import android.support.v7.widget.DefaultItemAnimator;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.util.AttributeSet;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.FrameLayout;
+
+import org.thoughtcrime.securesms.R;
+import org.thoughtcrime.securesms.crypto.MasterSecret;
+import org.thoughtcrime.securesms.database.Address;
+import org.thoughtcrime.securesms.database.CursorRecyclerViewAdapter;
+import org.thoughtcrime.securesms.database.MediaDatabase;
+import org.thoughtcrime.securesms.database.loaders.ThreadMediaLoader;
+import org.thoughtcrime.securesms.mms.Slide;
+import org.thoughtcrime.securesms.util.MediaUtil;
+import org.thoughtcrime.securesms.util.ViewUtil;
+
+public class ThreadPhotoRailView extends FrameLayout {
+
+  public static final String ADDRESS_EXTRA       = "address";
+  public static final String MASTER_SECRET_EXTRA = "master_secret";
+
+  @NonNull  private final RecyclerView          recyclerView;
+  @Nullable private       OnItemClickedListener listener;
+
+  public ThreadPhotoRailView(Context context) {
+    this(context, null);
+  }
+
+  public ThreadPhotoRailView(Context context, AttributeSet attrs) {
+    this(context, attrs, 0);
+  }
+
+  public ThreadPhotoRailView(Context context, AttributeSet attrs, int defStyleAttr) {
+    super(context, attrs, defStyleAttr);
+
+    inflate(context, R.layout.recipient_preference_photo_rail, this);
+
+    this.recyclerView = ViewUtil.findById(this, R.id.photo_list);
+    this.recyclerView.setLayoutManager(new LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false));
+    this.recyclerView.setItemAnimator(new DefaultItemAnimator());
+    this.recyclerView.setNestedScrollingEnabled(true);
+  }
+
+  public void setListener(@Nullable OnItemClickedListener listener) {
+    this.listener = listener;
+
+    if (this.recyclerView.getAdapter() != null) {
+      ((ThreadPhotoRailAdapter)this.recyclerView.getAdapter()).setListener(listener);
+    }
+  }
+
+  public void setCursor(@Nullable Cursor cursor, @NonNull MasterSecret masterSecret) {
+    this.recyclerView.setAdapter(new ThreadPhotoRailAdapter(getContext(), masterSecret, cursor, this.listener));
+  }
+  
+  private static class ThreadPhotoRailAdapter extends CursorRecyclerViewAdapter<ThreadPhotoRailAdapter.ThreadPhotoViewHolder> {
+
+    private static final String TAG = ThreadPhotoRailAdapter.class.getName();
+
+    private final MasterSecret masterSecret;
+
+    @Nullable private OnItemClickedListener clickedListener;
+
+    private ThreadPhotoRailAdapter(@NonNull Context context,
+                                   @NonNull MasterSecret masterSecret,
+                                   @NonNull Cursor cursor,
+                                   @Nullable OnItemClickedListener listener)
+    {
+      super(context, cursor);
+      this.masterSecret    = masterSecret;
+      this.clickedListener = listener;
+    }
+
+    @Override
+    public ThreadPhotoViewHolder onCreateItemViewHolder(ViewGroup parent, int viewType) {
+      View itemView = LayoutInflater.from(parent.getContext())
+                                    .inflate(R.layout.recipient_preference_photo_rail_item, parent, false);
+
+      return new ThreadPhotoViewHolder(itemView);
+    }
+
+    @Override
+    public void onBindItemViewHolder(ThreadPhotoViewHolder viewHolder, @NonNull Cursor cursor) {
+      ThumbnailView             imageView   = viewHolder.imageView;
+      MediaDatabase.MediaRecord mediaRecord = MediaDatabase.MediaRecord.from(getContext(), masterSecret, cursor);
+      Slide                     slide       = MediaUtil.getSlideForAttachment(getContext(), mediaRecord.getAttachment());
+
+      if (slide != null) {
+        imageView.setImageResource(masterSecret, slide, false, false);
+      }
+
+      imageView.setOnClickListener(v -> {
+        if (clickedListener != null) clickedListener.onItemClicked(mediaRecord);
+      });
+    }
+
+    public void setListener(@Nullable OnItemClickedListener listener) {
+      this.clickedListener = listener;
+    }
+
+    static class ThreadPhotoViewHolder extends RecyclerView.ViewHolder {
+
+      ThumbnailView imageView;
+
+      ThreadPhotoViewHolder(View itemView) {
+        super(itemView);
+
+        this.imageView = ViewUtil.findById(itemView, R.id.thumbnail);
+      }
+    }
+  }
+
+  public interface OnItemClickedListener {
+    public void onItemClicked(MediaDatabase.MediaRecord mediaRecord);
+  }
+}