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