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package de.pixart.messenger.ui.adapter;
import android.content.Context;
import android.content.res.Resources;
import android.databinding.DataBindingUtil;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.AsyncTask;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.ViewGroup;
import android.widget.ImageView;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.RejectedExecutionException;
import de.pixart.messenger.R;
import de.pixart.messenger.databinding.MediaPreviewBinding;
import de.pixart.messenger.ui.ConversationFragment;
import de.pixart.messenger.ui.XmppActivity;
import de.pixart.messenger.ui.util.Attachment;
public class MediaPreviewAdapter extends RecyclerView.Adapter<MediaPreviewAdapter.MediaPreviewViewHolder> {
private final ArrayList<Attachment> mediaPreviews = new ArrayList<>();
private final ConversationFragment conversationFragment;
public MediaPreviewAdapter(ConversationFragment fragment) {
this.conversationFragment = fragment;
}
private static boolean cancelPotentialWork(Attachment attachment, ImageView imageView) {
final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
if (bitmapWorkerTask != null) {
final Attachment oldAttachment = bitmapWorkerTask.attachment;
if (oldAttachment == null || !oldAttachment.equals(attachment)) {
bitmapWorkerTask.cancel(true);
} else {
return false;
}
}
return true;
}
private static BitmapWorkerTask getBitmapWorkerTask(ImageView imageView) {
if (imageView != null) {
final Drawable drawable = imageView.getDrawable();
if (drawable instanceof AsyncDrawable) {
final AsyncDrawable asyncDrawable = (AsyncDrawable) drawable;
return asyncDrawable.getBitmapWorkerTask();
}
}
return null;
}
@NonNull
@Override
public MediaPreviewViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
MediaPreviewBinding binding = DataBindingUtil.inflate(layoutInflater, R.layout.media_preview, parent, false);
return new MediaPreviewViewHolder(binding);
}
@Override
public void onBindViewHolder(@NonNull MediaPreviewViewHolder holder, int position) {
final Context context = conversationFragment.getActivity();
final Attachment attachment = mediaPreviews.get(position);
if (attachment.renderThumbnail()) {
holder.binding.mediaPreview.setImageAlpha(255);
loadPreview(attachment, holder.binding.mediaPreview);
} else {
cancelPotentialWork(attachment, holder.binding.mediaPreview);
MediaAdapter.renderPreview(context, attachment, holder.binding.mediaPreview);
}
holder.binding.deleteButton.setOnClickListener(v -> {
int pos = mediaPreviews.indexOf(attachment);
try {
mediaPreviews.remove(pos);
} catch (Exception e) {
e.printStackTrace();
}
notifyItemRemoved(pos);
conversationFragment.toggleInputMethod();
});
}
public void addMediaPreviews(List<Attachment> attachments) {
this.mediaPreviews.addAll(attachments);
notifyDataSetChanged();
}
private void loadPreview(Attachment attachment, ImageView imageView) {
if (cancelPotentialWork(attachment, imageView)) {
XmppActivity activity = (XmppActivity) conversationFragment.getActivity();
final Bitmap bm = activity.xmppConnectionService.getFileBackend().getPreviewForUri(attachment, Math.round(activity.getResources().getDimension(R.dimen.media_preview_size)), true);
if (bm != null) {
cancelPotentialWork(attachment, imageView);
imageView.setImageBitmap(bm);
imageView.setBackgroundColor(0x00000000);
} else {
imageView.setBackgroundColor(0xff333333);
imageView.setImageDrawable(null);
final BitmapWorkerTask task = new BitmapWorkerTask(imageView);
final AsyncDrawable asyncDrawable = new AsyncDrawable(conversationFragment.getActivity().getResources(), null, task);
imageView.setImageDrawable(asyncDrawable);
try {
task.execute(attachment);
} catch (final RejectedExecutionException ignored) {
}
}
}
}
@Override
public int getItemCount() {
return mediaPreviews.size();
}
public boolean hasAttachments() {
return mediaPreviews.size() > 0;
}
public ArrayList<Attachment> getAttachments() {
return mediaPreviews;
}
public void clearPreviews() {
this.mediaPreviews.clear();
}
static class AsyncDrawable extends BitmapDrawable {
private final WeakReference<BitmapWorkerTask> bitmapWorkerTaskReference;
AsyncDrawable(Resources res, Bitmap bitmap, BitmapWorkerTask bitmapWorkerTask) {
super(res, bitmap);
bitmapWorkerTaskReference = new WeakReference<>(bitmapWorkerTask);
}
BitmapWorkerTask getBitmapWorkerTask() {
return bitmapWorkerTaskReference.get();
}
}
class MediaPreviewViewHolder extends RecyclerView.ViewHolder {
private final MediaPreviewBinding binding;
MediaPreviewViewHolder(MediaPreviewBinding binding) {
super(binding.getRoot());
this.binding = binding;
}
}
private static class BitmapWorkerTask extends AsyncTask<Attachment, Void, Bitmap> {
private final WeakReference<ImageView> imageViewReference;
private Attachment attachment = null;
BitmapWorkerTask(ImageView imageView) {
imageViewReference = new WeakReference<>(imageView);
}
@Override
protected Bitmap doInBackground(Attachment... params) {
this.attachment = params[0];
final XmppActivity activity = XmppActivity.find(imageViewReference);
if (activity == null) {
return null;
}
return activity.xmppConnectionService.getFileBackend().getPreviewForUri(this.attachment, Math.round(activity.getResources().getDimension(R.dimen.media_preview_size)), false);
}
@Override
protected void onPostExecute(Bitmap bitmap) {
if (bitmap != null && !isCancelled()) {
final ImageView imageView = imageViewReference.get();
if (imageView != null) {
imageView.setImageBitmap(bitmap);
imageView.setBackgroundColor(0x00000000);
}
}
}
}
}
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