Use context menu when selecting a message in chat.

app/src/main/java/org/thoughtcrime/securesms/giph/mp4/GiphyMp4Playable.java

@@ -51,4 +51,10 @@ public interface GiphyMp4Playable {
    * Specifies whether the content can start playing.
    */
   boolean canPlayContent();
+
+  /**
+   * Specifies whether the projection from {@link #getGiphyMp4PlayableProjection(ViewGroup)} should
+   * be used to project into a view.
+   */
+  boolean shouldProjectContent();
 }

app/src/main/java/org/thoughtcrime/securesms/giph/mp4/GiphyMp4ProjectionPlayerHolder.java

@@ -1,6 +1,7 @@
 package org.thoughtcrime.securesms.giph.mp4;
 
 import android.content.Context;
+import android.graphics.Bitmap;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -98,10 +99,18 @@ public final class GiphyMp4ProjectionPlayerHolder implements Player.Listener, De
     container.setVisibility(View.GONE);
   }
 
+  public void pause() {
+    player.pause();
+  }
+
   public void show() {
     container.setVisibility(View.VISIBLE);
   }
 
+  public void resume() {
+    player.play();
+  }
+
   @Override
   public void onPlaybackStateChanged(int playbackState) {
     if (playbackState == Player.STATE_READY) {
@@ -177,4 +186,8 @@ public final class GiphyMp4ProjectionPlayerHolder implements Player.Listener, De
   public void setCorners(@Nullable Projection.Corners corners) {
     player.setCorners(corners);
   }
+
+  public @Nullable Bitmap getBitmap() {
+    return player.getBitmap();
+  }
 }

app/src/main/java/org/thoughtcrime/securesms/giph/mp4/GiphyMp4ProjectionRecycler.java

@@ -121,7 +121,7 @@ public final class GiphyMp4ProjectionRecycler implements GiphyMp4PlaybackControl
     }
   }
 
-  private @Nullable GiphyMp4ProjectionPlayerHolder getCurrentHolder(int adapterPosition) {
+  public @Nullable GiphyMp4ProjectionPlayerHolder getCurrentHolder(int adapterPosition) {
     if (playing.get(adapterPosition) != null) {
       return playing.get(adapterPosition);
     } else if (notPlaying.get(adapterPosition) != null) {

app/src/main/java/org/thoughtcrime/securesms/giph/mp4/GiphyMp4VideoPlayer.java

@@ -1,8 +1,11 @@
 package org.thoughtcrime.securesms.giph.mp4;
 
 import android.content.Context;
+import android.graphics.Bitmap;
 import android.graphics.Canvas;
 import android.util.AttributeSet;
+import android.view.TextureView;
+import android.view.View;
 import android.widget.FrameLayout;
 
 import androidx.annotation.NonNull;
@@ -103,6 +106,12 @@ public final class GiphyMp4VideoPlayer extends FrameLayout implements DefaultLif
     }
   }
 
+  void pause() {
+    if (exoPlayer != null) {
+      exoPlayer.pause();
+    }
+  }
+
   void stop() {
     if (exoPlayer != null) {
       exoPlayer.stop();
@@ -122,4 +131,13 @@ public final class GiphyMp4VideoPlayer extends FrameLayout implements DefaultLif
   void setResizeMode(@AspectRatioFrameLayout.ResizeMode int resizeMode) {
     exoView.setResizeMode(resizeMode);
   }
+
+  @Nullable Bitmap getBitmap() {
+    final View view = exoView.getVideoSurfaceView();
+    if (view instanceof TextureView) {
+      return ((TextureView) view).getBitmap();
+    }
+
+    return null;
+  }
 }

app/src/main/java/org/thoughtcrime/securesms/giph/mp4/GiphyMp4ViewHolder.java

@@ -89,6 +89,11 @@ final class GiphyMp4ViewHolder extends MappingViewHolder<GiphyImage> implements
     return true;
   }
 
+  @Override
+  public boolean shouldProjectContent() {
+    return true;
+  }
+
   private void loadPlaceholderImage(@NonNull GiphyImage giphyImage) {
     GlideApp.with(itemView)
             .load(new ChunkedImageUrl(giphyImage.getStillUrl()))