1package eu.siacs.conversations.ui.util;
2
3import android.content.Context;
4import android.content.res.Resources;
5import android.graphics.Bitmap;
6import android.graphics.drawable.BitmapDrawable;
7import android.graphics.drawable.Drawable;
8import android.os.AsyncTask;
9import android.widget.ImageView;
10import androidx.annotation.DimenRes;
11import eu.siacs.conversations.R;
12import eu.siacs.conversations.entities.Account;
13import eu.siacs.conversations.services.AvatarService;
14import eu.siacs.conversations.ui.XmppActivity;
15import java.lang.ref.WeakReference;
16import java.util.concurrent.RejectedExecutionException;
17
18public class AvatarWorkerTask extends AsyncTask<AvatarService.Avatarable, Void, Bitmap> {
19 private final WeakReference<ImageView> imageViewReference;
20 private AvatarService.Avatarable avatarable = null;
21 private @DimenRes final int size;
22
23 public AvatarWorkerTask(ImageView imageView, @DimenRes int size) {
24 imageViewReference = new WeakReference<>(imageView);
25 this.size = size;
26 }
27
28 @Override
29 protected Bitmap doInBackground(AvatarService.Avatarable... params) {
30 this.avatarable = params[0];
31 final XmppActivity activity = XmppActivity.find(imageViewReference);
32 if (activity == null) {
33 return null;
34 }
35 return activity.avatarService()
36 .get(avatarable, (int) activity.getResources().getDimension(size), isCancelled());
37 }
38
39 @Override
40 protected void onPostExecute(Bitmap bitmap) {
41 if (bitmap != null && !isCancelled()) {
42 final ImageView imageView = imageViewReference.get();
43 if (imageView != null) {
44 imageView.setImageBitmap(bitmap);
45 imageView.setBackgroundColor(0x00000000);
46 }
47 }
48 }
49
50 public static boolean cancelPotentialWork(
51 AvatarService.Avatarable avatarable, ImageView imageView) {
52 final AvatarWorkerTask workerTask = getBitmapWorkerTask(imageView);
53
54 if (workerTask != null) {
55 final AvatarService.Avatarable old = workerTask.avatarable;
56 if (old == null || avatarable != old) {
57 workerTask.cancel(true);
58 } else {
59 return false;
60 }
61 }
62 return true;
63 }
64
65 public static AvatarWorkerTask getBitmapWorkerTask(ImageView imageView) {
66 if (imageView != null) {
67 final Drawable drawable = imageView.getDrawable();
68 if (drawable instanceof AsyncDrawable asyncDrawable) {
69 return asyncDrawable.getAvatarWorkerTask();
70 }
71 }
72 return null;
73 }
74
75 public static void loadAvatar(
76 final AvatarService.Avatarable avatarable,
77 final ImageView imageView,
78 final @DimenRes int size) {
79 if (cancelPotentialWork(avatarable, imageView)) {
80 final XmppActivity activity = XmppActivity.find(imageView);
81 if (activity == null) {
82 return;
83 }
84 final Bitmap bm =
85 activity.avatarService()
86 .get(
87 avatarable,
88 (int) activity.getResources().getDimension(size),
89 true);
90 setContentDescription(avatarable, imageView);
91 if (bm != null) {
92 cancelPotentialWork(avatarable, imageView);
93 imageView.setImageBitmap(bm);
94 imageView.setBackgroundColor(0x00000000);
95 } else {
96 imageView.setBackgroundColor(avatarable.getAvatarBackgroundColor());
97 imageView.setImageDrawable(null);
98 final AvatarWorkerTask task = new AvatarWorkerTask(imageView, size);
99 final AsyncDrawable asyncDrawable =
100 new AsyncDrawable(activity.getResources(), null, task);
101 imageView.setImageDrawable(asyncDrawable);
102 try {
103 task.execute(avatarable);
104 } catch (final RejectedExecutionException ignored) {
105 }
106 }
107 }
108 }
109
110 private static void setContentDescription(
111 final AvatarService.Avatarable avatarable, final ImageView imageView) {
112 final Context context = imageView.getContext();
113 if (avatarable instanceof Account) {
114 imageView.setContentDescription(context.getString(R.string.your_avatar));
115 } else {
116 imageView.setContentDescription(
117 context.getString(R.string.avatar_for_x, avatarable.getAvatarName()));
118 }
119 }
120
121 static class AsyncDrawable extends BitmapDrawable {
122 private final WeakReference<AvatarWorkerTask> avatarWorkerTaskReference;
123
124 AsyncDrawable(Resources res, Bitmap bitmap, AvatarWorkerTask workerTask) {
125 super(res, bitmap);
126 avatarWorkerTaskReference = new WeakReference<>(workerTask);
127 }
128
129 AvatarWorkerTask getAvatarWorkerTask() {
130 return avatarWorkerTaskReference.get();
131 }
132 }
133}