talk-android/app/src/main/java/com/nextcloud/talk/adapters/ParticipantsAdapter.java

package com.nextcloud.talk.adapters;

import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;

import com.facebook.drawee.backends.pipeline.Fresco;
import com.facebook.drawee.interfaces.DraweeController;
import com.facebook.drawee.view.SimpleDraweeView;
import com.nextcloud.talk.R;
import com.nextcloud.talk.controllers.CallController;
import com.nextcloud.talk.utils.DisplayUtils;

import org.webrtc.MediaStream;
import org.webrtc.RendererCommon;
import org.webrtc.SurfaceViewRenderer;
import org.webrtc.VideoTrack;

import java.util.ArrayList;
import java.util.Map;

public class ParticipantsAdapter extends BaseAdapter {

    private static final String TAG = "ParticipantsAdapter";
    private static final int ITEM_MIN_HEIGHT = 500;

    private final Context mContext;
    private final ArrayList<ParticipantDisplayItem> participantDisplayItems;
    private final RelativeLayout gridViewWrapper;
    private final LinearLayout callInfosLinearLayout;
    private final int columns;
    private final boolean isVoiceOnlyCall;

    public ParticipantsAdapter(Context mContext,
                               Map<String, ParticipantDisplayItem> participantDisplayItems,
                               RelativeLayout gridViewWrapper,
                               LinearLayout callInfosLinearLayout,
                               int columns,
                               boolean isVoiceOnlyCall) {
        this.mContext = mContext;
        this.gridViewWrapper = gridViewWrapper;
        this.callInfosLinearLayout = callInfosLinearLayout;
        this.columns = columns;
        this.isVoiceOnlyCall = isVoiceOnlyCall;

        this.participantDisplayItems = new ArrayList<>();
        this.participantDisplayItems.addAll(participantDisplayItems.values());
    }


    @Override
    public int getCount() {
        return participantDisplayItems.size();
    }

    @Override
    public ParticipantDisplayItem getItem(int position) {
        return participantDisplayItems.get(position);
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ParticipantDisplayItem participantDisplayItem = getItem(position);

        SurfaceViewRenderer surfaceViewRenderer;
        if (convertView == null) {
            convertView = LayoutInflater.from(mContext).inflate(R.layout.call_item, parent, false);
            convertView.setVisibility(View.VISIBLE);

            surfaceViewRenderer = convertView.findViewById(R.id.surface_view);
            try {
                surfaceViewRenderer.setMirror(false);
                surfaceViewRenderer.init(participantDisplayItem.getRootEglBase().getEglBaseContext(), null);
                surfaceViewRenderer.setZOrderMediaOverlay(false);
                // disabled because it causes some devices to crash
                surfaceViewRenderer.setEnableHardwareScaler(false);
                surfaceViewRenderer.setScalingType(RendererCommon.ScalingType.SCALE_ASPECT_FIT);
            } catch (Exception e) {
                Log.e(TAG, "error while initializing surfaceViewRenderer", e);
            }
        } else {
            surfaceViewRenderer = convertView.findViewById(R.id.surface_view);
        }

        ViewGroup.LayoutParams layoutParams = convertView.getLayoutParams();
        layoutParams.height = scaleGridViewItemHeight();
        convertView.setLayoutParams(layoutParams);


        TextView nickTextView = convertView.findViewById(R.id.peer_nick_text_view);
        SimpleDraweeView imageView = convertView.findViewById(R.id.avatarImageView);

        MediaStream mediaStream = participantDisplayItem.getMediaStream();
        if (hasVideoStream(participantDisplayItem, mediaStream)) {
            VideoTrack videoTrack = mediaStream.videoTracks.get(0);
            videoTrack.addSink(surfaceViewRenderer);
            imageView.setVisibility(View.INVISIBLE);
            surfaceViewRenderer.setVisibility(View.VISIBLE);
            nickTextView.setVisibility(View.GONE);
        } else {
            imageView.setVisibility(View.VISIBLE);
            surfaceViewRenderer.setVisibility(View.INVISIBLE);
            nickTextView.setVisibility(View.VISIBLE);
            nickTextView.setText(participantDisplayItem.getNick());

            imageView.setController(null);
            DraweeController draweeController = Fresco.newDraweeControllerBuilder()
                    .setOldController(imageView.getController())
                    .setImageRequest(DisplayUtils.getImageRequestForUrl(participantDisplayItem.getUrlForAvatar(), null))
                    .build();
            imageView.setController(draweeController);
        }

        ImageView audioOffView = convertView.findViewById(R.id.remote_audio_off);
        if (!participantDisplayItem.isAudioEnabled()) {
            audioOffView.setVisibility(View.VISIBLE);
        } else {
            audioOffView.setVisibility(View.INVISIBLE);
        }
        return convertView;
    }

    private boolean hasVideoStream(ParticipantDisplayItem participantDisplayItem, MediaStream mediaStream) {
        return mediaStream != null && mediaStream.videoTracks != null && mediaStream.videoTracks.size() > 0 && participantDisplayItem.isStreamEnabled();
    }

    private int scaleGridViewItemHeight() {
        int headerHeight = 0;
        int callControlsHeight = 0;
        if (callInfosLinearLayout.getVisibility() == View.VISIBLE && isVoiceOnlyCall) {
            headerHeight = callInfosLinearLayout.getHeight();
        }
        if (isVoiceOnlyCall) {
            callControlsHeight = CallController.CALL_CONTROLS_HEIGHT;
        }
        int itemHeight = (gridViewWrapper.getHeight() - headerHeight - callControlsHeight) / getRowsCount(getCount());
        if (itemHeight < ITEM_MIN_HEIGHT) {
            itemHeight = ITEM_MIN_HEIGHT;
        }
        return itemHeight;
    }

    private int getRowsCount(int items) {
        int rows = (int) Math.ceil((double) items / (double) columns);
        if (rows == 0) {
            rows = 1;
        }
        return rows;
    }
}