1package eu.siacs.conversations.persistance;
2
3import android.content.ContentResolver;
4import android.content.Context;
5import android.content.res.Resources;
6import android.database.Cursor;
7import android.graphics.Bitmap;
8import android.graphics.BitmapFactory;
9import android.graphics.Canvas;
10import android.graphics.Color;
11import android.graphics.drawable.BitmapDrawable;
12import android.graphics.drawable.Drawable;
13import android.graphics.ImageDecoder;
14import android.graphics.Matrix;
15import android.graphics.Paint;
16import android.graphics.Rect;
17import android.graphics.RectF;
18import android.graphics.pdf.PdfRenderer;
19import android.media.MediaMetadataRetriever;
20import android.media.MediaScannerConnection;
21import android.net.Uri;
22import android.os.Build;
23import android.os.Environment;
24import android.os.ParcelFileDescriptor;
25import android.provider.MediaStore;
26import android.provider.OpenableColumns;
27import android.system.Os;
28import android.system.StructStat;
29import android.util.Base64;
30import android.util.Base64OutputStream;
31import android.util.DisplayMetrics;
32import android.util.Log;
33import android.util.LruCache;
34
35import androidx.annotation.RequiresApi;
36import androidx.annotation.StringRes;
37import androidx.core.content.FileProvider;
38import androidx.documentfile.provider.DocumentFile;
39import androidx.exifinterface.media.ExifInterface;
40
41import com.cheogram.android.BobTransfer;
42
43import com.google.common.base.Strings;
44import com.google.common.collect.ImmutableList;
45import com.google.common.io.ByteStreams;
46
47import com.wolt.blurhashkt.BlurHashDecoder;
48
49import java.io.ByteArrayOutputStream;
50import java.io.Closeable;
51import java.io.File;
52import java.io.FileDescriptor;
53import java.io.FileInputStream;
54import java.io.FileNotFoundException;
55import java.io.FileOutputStream;
56import java.io.IOException;
57import java.io.InputStream;
58import java.io.OutputStream;
59import java.net.ServerSocket;
60import java.net.Socket;
61import java.nio.ByteBuffer;
62import java.security.DigestOutputStream;
63import java.security.MessageDigest;
64import java.security.NoSuchAlgorithmException;
65import java.text.SimpleDateFormat;
66import java.util.ArrayList;
67import java.util.Arrays;
68import java.util.Date;
69import java.util.List;
70import java.util.Locale;
71import java.util.UUID;
72
73import io.ipfs.cid.Cid;
74
75import eu.siacs.conversations.Config;
76import eu.siacs.conversations.R;
77import eu.siacs.conversations.entities.DownloadableFile;
78import eu.siacs.conversations.entities.Message;
79import eu.siacs.conversations.services.AttachFileToConversationRunnable;
80import eu.siacs.conversations.services.XmppConnectionService;
81import eu.siacs.conversations.ui.adapter.MediaAdapter;
82import eu.siacs.conversations.ui.util.Attachment;
83import eu.siacs.conversations.utils.CryptoHelper;
84import eu.siacs.conversations.utils.FileUtils;
85import eu.siacs.conversations.utils.FileWriterException;
86import eu.siacs.conversations.utils.MimeUtils;
87import eu.siacs.conversations.xmpp.pep.Avatar;
88import eu.siacs.conversations.xml.Element;
89
90public class FileBackend {
91
92 private static final Object THUMBNAIL_LOCK = new Object();
93
94 private static final SimpleDateFormat IMAGE_DATE_FORMAT =
95 new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.US);
96
97 private static final String FILE_PROVIDER = ".files";
98 private static final float IGNORE_PADDING = 0.15f;
99 private final XmppConnectionService mXmppConnectionService;
100
101 private static final List<String> STORAGE_TYPES;
102
103 static {
104 final ImmutableList.Builder<String> builder =
105 new ImmutableList.Builder<String>()
106 .add(
107 Environment.DIRECTORY_DOWNLOADS,
108 Environment.DIRECTORY_PICTURES,
109 Environment.DIRECTORY_MOVIES);
110 if (Build.VERSION.SDK_INT >= 19) {
111 builder.add(Environment.DIRECTORY_DOCUMENTS);
112 }
113 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
114 builder.add(Environment.DIRECTORY_RECORDINGS);
115 }
116 STORAGE_TYPES = builder.build();
117 }
118
119 public FileBackend(XmppConnectionService service) {
120 this.mXmppConnectionService = service;
121 }
122
123 public static long getFileSize(Context context, Uri uri) {
124 try (final Cursor cursor =
125 context.getContentResolver().query(uri, null, null, null, null)) {
126 if (cursor != null && cursor.moveToFirst()) {
127 final int index = cursor.getColumnIndex(OpenableColumns.SIZE);
128 if (index == -1) {
129 return -1;
130 }
131 return cursor.getLong(index);
132 }
133 return -1;
134 } catch (final Exception ignored) {
135 return -1;
136 }
137 }
138
139 public static boolean allFilesUnderSize(
140 Context context, List<Attachment> attachments, long max) {
141 final boolean compressVideo =
142 !AttachFileToConversationRunnable.getVideoCompression(context)
143 .equals("uncompressed");
144 if (max <= 0) {
145 Log.d(Config.LOGTAG, "server did not report max file size for http upload");
146 return true; // exception to be compatible with HTTP Upload < v0.2
147 }
148 for (Attachment attachment : attachments) {
149 if (attachment.getType() != Attachment.Type.FILE) {
150 continue;
151 }
152 String mime = attachment.getMime();
153 if (mime != null && mime.startsWith("video/") && compressVideo) {
154 try {
155 Dimensions dimensions =
156 FileBackend.getVideoDimensions(context, attachment.getUri());
157 if (dimensions.getMin() > 720) {
158 Log.d(
159 Config.LOGTAG,
160 "do not consider video file with min width larger than 720 for size check");
161 continue;
162 }
163 } catch (NotAVideoFile notAVideoFile) {
164 // ignore and fall through
165 }
166 }
167 if (FileBackend.getFileSize(context, attachment.getUri()) > max) {
168 Log.d(
169 Config.LOGTAG,
170 "not all files are under "
171 + max
172 + " bytes. suggesting falling back to jingle");
173 return false;
174 }
175 }
176 return true;
177 }
178
179 public static File getBackupDirectory(final Context context) {
180 final File conversationsDownloadDirectory =
181 new File(
182 Environment.getExternalStoragePublicDirectory(
183 Environment.DIRECTORY_DOWNLOADS),
184 context.getString(R.string.app_name));
185 return new File(conversationsDownloadDirectory, "Backup");
186 }
187
188 public static File getLegacyBackupDirectory(final String app) {
189 final File appDirectory = new File(Environment.getExternalStorageDirectory(), app);
190 return new File(appDirectory, "Backup");
191 }
192
193 private static Bitmap rotate(final Bitmap bitmap, final int degree) {
194 if (degree == 0) {
195 return bitmap;
196 }
197 final int w = bitmap.getWidth();
198 final int h = bitmap.getHeight();
199 final Matrix matrix = new Matrix();
200 matrix.postRotate(degree);
201 final Bitmap result = Bitmap.createBitmap(bitmap, 0, 0, w, h, matrix, true);
202 if (!bitmap.isRecycled()) {
203 bitmap.recycle();
204 }
205 return result;
206 }
207
208 public static boolean isPathBlacklisted(String path) {
209 final String androidDataPath =
210 Environment.getExternalStorageDirectory().getAbsolutePath() + "/Android/data/";
211 return path.startsWith(androidDataPath);
212 }
213
214 private static Paint createAntiAliasingPaint() {
215 Paint paint = new Paint();
216 paint.setAntiAlias(true);
217 paint.setFilterBitmap(true);
218 paint.setDither(true);
219 return paint;
220 }
221
222 public static Uri getUriForUri(Context context, Uri uri) {
223 if ("file".equals(uri.getScheme())) {
224 return getUriForFile(context, new File(uri.getPath()));
225 } else {
226 return uri;
227 }
228 }
229
230 public static Uri getUriForFile(Context context, File file) {
231 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N || Config.ONLY_INTERNAL_STORAGE) {
232 try {
233 return FileProvider.getUriForFile(context, getAuthority(context), file);
234 } catch (IllegalArgumentException e) {
235 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
236 throw new SecurityException(e);
237 } else {
238 return Uri.fromFile(file);
239 }
240 }
241 } else {
242 return Uri.fromFile(file);
243 }
244 }
245
246 public static String getAuthority(Context context) {
247 return context.getPackageName() + FILE_PROVIDER;
248 }
249
250 private static boolean hasAlpha(final Bitmap bitmap) {
251 final int w = bitmap.getWidth();
252 final int h = bitmap.getHeight();
253 final int yStep = Math.max(1, w / 100);
254 final int xStep = Math.max(1, h / 100);
255 for (int x = 0; x < w; x += xStep) {
256 for (int y = 0; y < h; y += yStep) {
257 if (Color.alpha(bitmap.getPixel(x, y)) < 255) {
258 return true;
259 }
260 }
261 }
262 return false;
263 }
264
265 private static int calcSampleSize(File image, int size) {
266 BitmapFactory.Options options = new BitmapFactory.Options();
267 options.inJustDecodeBounds = true;
268 BitmapFactory.decodeFile(image.getAbsolutePath(), options);
269 return calcSampleSize(options, size);
270 }
271
272 private static int calcSampleSize(BitmapFactory.Options options, int size) {
273 int height = options.outHeight;
274 int width = options.outWidth;
275 int inSampleSize = 1;
276
277 if (height > size || width > size) {
278 int halfHeight = height / 2;
279 int halfWidth = width / 2;
280
281 while ((halfHeight / inSampleSize) > size && (halfWidth / inSampleSize) > size) {
282 inSampleSize *= 2;
283 }
284 }
285 return inSampleSize;
286 }
287
288 private static Dimensions getVideoDimensions(Context context, Uri uri) throws NotAVideoFile {
289 MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
290 try {
291 mediaMetadataRetriever.setDataSource(context, uri);
292 } catch (RuntimeException e) {
293 throw new NotAVideoFile(e);
294 }
295 return getVideoDimensions(mediaMetadataRetriever);
296 }
297
298 private static Dimensions getVideoDimensionsOfFrame(
299 MediaMetadataRetriever mediaMetadataRetriever) {
300 Bitmap bitmap = null;
301 try {
302 bitmap = mediaMetadataRetriever.getFrameAtTime();
303 return new Dimensions(bitmap.getHeight(), bitmap.getWidth());
304 } catch (Exception e) {
305 return null;
306 } finally {
307 if (bitmap != null) {
308 bitmap.recycle();
309 }
310 }
311 }
312
313 private static Dimensions getVideoDimensions(MediaMetadataRetriever metadataRetriever)
314 throws NotAVideoFile {
315 String hasVideo =
316 metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_HAS_VIDEO);
317 if (hasVideo == null) {
318 throw new NotAVideoFile();
319 }
320 Dimensions dimensions = getVideoDimensionsOfFrame(metadataRetriever);
321 if (dimensions != null) {
322 return dimensions;
323 }
324 final int rotation = extractRotationFromMediaRetriever(metadataRetriever);
325 boolean rotated = rotation == 90 || rotation == 270;
326 int height;
327 try {
328 String h =
329 metadataRetriever.extractMetadata(
330 MediaMetadataRetriever.METADATA_KEY_VIDEO_HEIGHT);
331 height = Integer.parseInt(h);
332 } catch (Exception e) {
333 height = -1;
334 }
335 int width;
336 try {
337 String w =
338 metadataRetriever.extractMetadata(
339 MediaMetadataRetriever.METADATA_KEY_VIDEO_WIDTH);
340 width = Integer.parseInt(w);
341 } catch (Exception e) {
342 width = -1;
343 }
344 try {
345 metadataRetriever.release();
346 } catch (final IOException e) {
347 throw new NotAVideoFile();
348 }
349 Log.d(Config.LOGTAG, "extracted video dims " + width + "x" + height);
350 return rotated ? new Dimensions(width, height) : new Dimensions(height, width);
351 }
352
353 private static int extractRotationFromMediaRetriever(MediaMetadataRetriever metadataRetriever) {
354 String r =
355 metadataRetriever.extractMetadata(
356 MediaMetadataRetriever.METADATA_KEY_VIDEO_ROTATION);
357 try {
358 return Integer.parseInt(r);
359 } catch (Exception e) {
360 return 0;
361 }
362 }
363
364 public static void close(final Closeable stream) {
365 if (stream != null) {
366 try {
367 stream.close();
368 } catch (Exception e) {
369 Log.d(Config.LOGTAG, "unable to close stream", e);
370 }
371 }
372 }
373
374 public static void close(final Socket socket) {
375 if (socket != null) {
376 try {
377 socket.close();
378 } catch (IOException e) {
379 Log.d(Config.LOGTAG, "unable to close socket", e);
380 }
381 }
382 }
383
384 public static void close(final ServerSocket socket) {
385 if (socket != null) {
386 try {
387 socket.close();
388 } catch (IOException e) {
389 Log.d(Config.LOGTAG, "unable to close server socket", e);
390 }
391 }
392 }
393
394 public static boolean weOwnFile(final Uri uri) {
395 if (uri == null || !ContentResolver.SCHEME_FILE.equals(uri.getScheme())) {
396 return false;
397 } else {
398 return weOwnFileLollipop(uri);
399 }
400 }
401
402 private static boolean weOwnFileLollipop(final Uri uri) {
403 final String path = uri.getPath();
404 if (path == null) {
405 return false;
406 }
407 try {
408 File file = new File(path);
409 FileDescriptor fd =
410 ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY)
411 .getFileDescriptor();
412 StructStat st = Os.fstat(fd);
413 return st.st_uid == android.os.Process.myUid();
414 } catch (FileNotFoundException e) {
415 return false;
416 } catch (Exception e) {
417 return true;
418 }
419 }
420
421 public static Uri getMediaUri(Context context, File file) {
422 final String filePath = file.getAbsolutePath();
423 try (final Cursor cursor =
424 context.getContentResolver()
425 .query(
426 MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
427 new String[] {MediaStore.Images.Media._ID},
428 MediaStore.Images.Media.DATA + "=? ",
429 new String[] {filePath},
430 null)) {
431 if (cursor != null && cursor.moveToFirst()) {
432 final int id =
433 cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.MediaColumns._ID));
434 return Uri.withAppendedPath(
435 MediaStore.Images.Media.EXTERNAL_CONTENT_URI, String.valueOf(id));
436 } else {
437 return null;
438 }
439 } catch (final Exception e) {
440 return null;
441 }
442 }
443
444 public static void updateFileParams(Message message, String url, long size) {
445 Message.FileParams fileParams = new Message.FileParams();
446 fileParams.url = url;
447 fileParams.size = size;
448 message.setFileParams(fileParams);
449 }
450
451 public Bitmap getPreviewForUri(Attachment attachment, int size, boolean cacheOnly) {
452 final String key = "attachment_" + attachment.getUuid().toString() + "_" + size;
453 final LruCache<String, Bitmap> cache = mXmppConnectionService.getBitmapCache();
454 Bitmap bitmap = cache.get(key);
455 if (bitmap != null || cacheOnly) {
456 return bitmap;
457 }
458 final String mime = attachment.getMime();
459 if ("application/pdf".equals(mime)) {
460 bitmap = cropCenterSquarePdf(attachment.getUri(), size);
461 drawOverlay(
462 bitmap,
463 paintOverlayBlackPdf(bitmap)
464 ? R.drawable.open_pdf_black
465 : R.drawable.open_pdf_white,
466 0.75f);
467 } else if (mime != null && mime.startsWith("video/")) {
468 bitmap = cropCenterSquareVideo(attachment.getUri(), size);
469 drawOverlay(
470 bitmap,
471 paintOverlayBlack(bitmap)
472 ? R.drawable.play_video_black
473 : R.drawable.play_video_white,
474 0.75f);
475 } else {
476 bitmap = cropCenterSquare(attachment.getUri(), size);
477 if (bitmap != null && "image/gif".equals(mime)) {
478 Bitmap withGifOverlay = bitmap.copy(Bitmap.Config.ARGB_8888, true);
479 drawOverlay(
480 withGifOverlay,
481 paintOverlayBlack(withGifOverlay)
482 ? R.drawable.play_gif_black
483 : R.drawable.play_gif_white,
484 1.0f);
485 bitmap.recycle();
486 bitmap = withGifOverlay;
487 }
488 }
489 if (bitmap != null) {
490 cache.put(key, bitmap);
491 }
492 return bitmap;
493 }
494
495 public void updateMediaScanner(File file) {
496 updateMediaScanner(file, null);
497 }
498
499 public void updateMediaScanner(File file, final Runnable callback) {
500 MediaScannerConnection.scanFile(
501 mXmppConnectionService,
502 new String[] {file.getAbsolutePath()},
503 null,
504 new MediaScannerConnection.MediaScannerConnectionClient() {
505 @Override
506 public void onMediaScannerConnected() {}
507
508 @Override
509 public void onScanCompleted(String path, Uri uri) {
510 if (callback != null && file.getAbsolutePath().equals(path)) {
511 callback.run();
512 } else {
513 Log.d(Config.LOGTAG, "media scanner scanned wrong file");
514 if (callback != null) {
515 callback.run();
516 }
517 }
518 }
519 });
520 }
521
522 public boolean deleteFile(Message message) {
523 File file = getFile(message);
524 if (file.delete()) {
525 updateMediaScanner(file);
526 return true;
527 } else {
528 return false;
529 }
530 }
531
532 public DownloadableFile getFile(Message message) {
533 return getFile(message, true);
534 }
535
536 public DownloadableFile getFileForPath(String path) {
537 return getFileForPath(
538 path,
539 MimeUtils.guessMimeTypeFromExtension(MimeUtils.extractRelevantExtension(path)));
540 }
541
542 private DownloadableFile getFileForPath(final String path, final String mime) {
543 if (path.startsWith("/")) {
544 return new DownloadableFile(path);
545 } else {
546 return getLegacyFileForFilename(path, mime);
547 }
548 }
549
550 public DownloadableFile getLegacyFileForFilename(final String filename, final String mime) {
551 if (Strings.isNullOrEmpty(mime)) {
552 return new DownloadableFile(getLegacyStorageLocation("Files"), filename);
553 } else if (mime.startsWith("image/")) {
554 return new DownloadableFile(getLegacyStorageLocation("Images"), filename);
555 } else if (mime.startsWith("video/")) {
556 return new DownloadableFile(getLegacyStorageLocation("Videos"), filename);
557 } else {
558 return new DownloadableFile(getLegacyStorageLocation("Files"), filename);
559 }
560 }
561
562 public boolean isInternalFile(final File file) {
563 final File internalFile = getFileForPath(file.getName());
564 return file.getAbsolutePath().equals(internalFile.getAbsolutePath());
565 }
566
567 public DownloadableFile getFile(Message message, boolean decrypted) {
568 final boolean encrypted =
569 !decrypted
570 && (message.getEncryption() == Message.ENCRYPTION_PGP
571 || message.getEncryption() == Message.ENCRYPTION_DECRYPTED);
572 String path = message.getRelativeFilePath();
573 if (path == null) {
574 path = message.getUuid();
575 }
576 final DownloadableFile file = getFileForPath(path, message.getMimeType());
577 if (encrypted) {
578 return new DownloadableFile(
579 mXmppConnectionService.getCacheDir(),
580 String.format("%s.%s", file.getName(), "pgp"));
581 } else {
582 return file;
583 }
584 }
585
586 public List<Attachment> convertToAttachments(List<DatabaseBackend.FilePath> relativeFilePaths) {
587 final List<Attachment> attachments = new ArrayList<>();
588 for (final DatabaseBackend.FilePath relativeFilePath : relativeFilePaths) {
589 final String mime =
590 MimeUtils.guessMimeTypeFromExtension(
591 MimeUtils.extractRelevantExtension(relativeFilePath.path));
592 final File file = getFileForPath(relativeFilePath.path, mime);
593 attachments.add(Attachment.of(relativeFilePath.uuid, file, mime));
594 }
595 return attachments;
596 }
597
598 private File getLegacyStorageLocation(final String type) {
599 if (Config.ONLY_INTERNAL_STORAGE) {
600 return new File(mXmppConnectionService.getFilesDir(), type);
601 } else {
602 final File appDirectory =
603 new File(
604 Environment.getExternalStorageDirectory(),
605 mXmppConnectionService.getString(R.string.app_name));
606 final File appMediaDirectory = new File(appDirectory, "Media");
607 final String locationName =
608 String.format(
609 "%s %s", mXmppConnectionService.getString(R.string.app_name), type);
610 return new File(appMediaDirectory, locationName);
611 }
612 }
613
614 private Bitmap resize(final Bitmap originalBitmap, int size) throws IOException {
615 int w = originalBitmap.getWidth();
616 int h = originalBitmap.getHeight();
617 if (w <= 0 || h <= 0) {
618 throw new IOException("Decoded bitmap reported bounds smaller 0");
619 } else if (Math.max(w, h) > size) {
620 int scalledW;
621 int scalledH;
622 if (w <= h) {
623 scalledW = Math.max((int) (w / ((double) h / size)), 1);
624 scalledH = size;
625 } else {
626 scalledW = size;
627 scalledH = Math.max((int) (h / ((double) w / size)), 1);
628 }
629 final Bitmap result =
630 Bitmap.createScaledBitmap(originalBitmap, scalledW, scalledH, true);
631 if (!originalBitmap.isRecycled()) {
632 originalBitmap.recycle();
633 }
634 return result;
635 } else {
636 return originalBitmap;
637 }
638 }
639
640 public boolean useImageAsIs(final Uri uri) {
641 final String path = getOriginalPath(uri);
642 if (path == null || isPathBlacklisted(path)) {
643 return false;
644 }
645 final File file = new File(path);
646 long size = file.length();
647 if (size == 0
648 || size
649 >= mXmppConnectionService
650 .getResources()
651 .getInteger(R.integer.auto_accept_filesize)) {
652 return false;
653 }
654 BitmapFactory.Options options = new BitmapFactory.Options();
655 options.inJustDecodeBounds = true;
656 try {
657 for (Cid cid : calculateCids(uri)) {
658 if (mXmppConnectionService.getUrlForCid(cid) != null) return true;
659 }
660 final InputStream inputStream =
661 mXmppConnectionService.getContentResolver().openInputStream(uri);
662 BitmapFactory.decodeStream(inputStream, null, options);
663 close(inputStream);
664 if (options.outMimeType == null || options.outHeight <= 0 || options.outWidth <= 0) {
665 return false;
666 }
667 return (options.outWidth <= Config.IMAGE_SIZE
668 && options.outHeight <= Config.IMAGE_SIZE
669 && options.outMimeType.contains(Config.IMAGE_FORMAT.name().toLowerCase()));
670 } catch (final IOException e) {
671 Log.d(Config.LOGTAG, "unable to get image dimensions", e);
672 return false;
673 }
674 }
675
676 public String getOriginalPath(Uri uri) {
677 return FileUtils.getPath(mXmppConnectionService, uri);
678 }
679
680 public void copyFileToDocumentFile(Context ctx, File file, DocumentFile df) throws FileCopyException {
681 Log.d(
682 Config.LOGTAG,
683 "copy file (" + file + ") to " + df);
684 try (final InputStream is = new FileInputStream(file);
685 final OutputStream os =
686 mXmppConnectionService.getContentResolver().openOutputStream(df.getUri())) {
687 if (is == null) {
688 throw new FileCopyException(R.string.error_file_not_found);
689 }
690 try {
691 ByteStreams.copy(is, os);
692 os.flush();
693 } catch (IOException e) {
694 throw new FileWriterException(file);
695 }
696 } catch (final FileNotFoundException e) {
697 throw new FileCopyException(R.string.error_file_not_found);
698 } catch (final FileWriterException e) {
699 throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
700 } catch (final SecurityException | IllegalStateException e) {
701 throw new FileCopyException(R.string.error_security_exception);
702 } catch (final IOException e) {
703 throw new FileCopyException(R.string.error_io_exception);
704 }
705 }
706
707 private void copyFileToPrivateStorage(File file, Uri uri) throws FileCopyException {
708 Log.d(
709 Config.LOGTAG,
710 "copy file (" + uri.toString() + ") to private storage " + file.getAbsolutePath());
711 file.getParentFile().mkdirs();
712 try {
713 file.createNewFile();
714 } catch (IOException e) {
715 throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
716 }
717 try (final OutputStream os = new FileOutputStream(file);
718 final InputStream is =
719 mXmppConnectionService.getContentResolver().openInputStream(uri)) {
720 if (is == null) {
721 throw new FileCopyException(R.string.error_file_not_found);
722 }
723 try {
724 ByteStreams.copy(is, os);
725 } catch (IOException e) {
726 throw new FileWriterException(file);
727 }
728 try {
729 os.flush();
730 } catch (IOException e) {
731 throw new FileWriterException(file);
732 }
733 } catch (final FileNotFoundException e) {
734 cleanup(file);
735 throw new FileCopyException(R.string.error_file_not_found);
736 } catch (final FileWriterException e) {
737 cleanup(file);
738 throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
739 } catch (final SecurityException | IllegalStateException e) {
740 cleanup(file);
741 throw new FileCopyException(R.string.error_security_exception);
742 } catch (final IOException e) {
743 cleanup(file);
744 throw new FileCopyException(R.string.error_io_exception);
745 }
746 }
747
748 public void copyFileToPrivateStorage(Message message, Uri uri, String type)
749 throws FileCopyException {
750 String mime = MimeUtils.guessMimeTypeFromUriAndMime(mXmppConnectionService, uri, type);
751 Log.d(Config.LOGTAG, "copy " + uri.toString() + " to private storage (mime=" + mime + ")");
752 String extension = MimeUtils.guessExtensionFromMimeType(mime);
753 if (extension == null) {
754 Log.d(Config.LOGTAG, "extension from mime type was null");
755 extension = getExtensionFromUri(uri);
756 }
757 if ("ogg".equals(extension) && type != null && type.startsWith("audio/")) {
758 extension = "oga";
759 }
760
761 try {
762 setupRelativeFilePath(message, uri, extension);
763 copyFileToPrivateStorage(mXmppConnectionService.getFileBackend().getFile(message), uri);
764 } catch (final XmppConnectionService.BlockedMediaException e) {
765 message.setRelativeFilePath(null);
766 message.setDeleted(true);
767 }
768 }
769
770 private String getExtensionFromUri(final Uri uri) {
771 final String[] projection = {MediaStore.MediaColumns.DATA};
772 String filename = null;
773 try (final Cursor cursor =
774 mXmppConnectionService
775 .getContentResolver()
776 .query(uri, projection, null, null, null)) {
777 if (cursor != null && cursor.moveToFirst()) {
778 filename = cursor.getString(0);
779 }
780 } catch (final Exception e) {
781 filename = null;
782 }
783 if (filename == null) {
784 final List<String> segments = uri.getPathSegments();
785 if (segments.size() > 0) {
786 filename = segments.get(segments.size() - 1);
787 }
788 }
789 final int pos = filename == null ? -1 : filename.lastIndexOf('.');
790 return pos > 0 ? filename.substring(pos + 1) : null;
791 }
792
793 private void copyImageToPrivateStorage(File file, Uri image, int sampleSize)
794 throws FileCopyException, ImageCompressionException {
795 final File parent = file.getParentFile();
796 if (parent != null && parent.mkdirs()) {
797 Log.d(Config.LOGTAG, "created parent directory");
798 }
799 InputStream is = null;
800 OutputStream os = null;
801 try {
802 if (!file.exists() && !file.createNewFile()) {
803 throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
804 }
805 is = mXmppConnectionService.getContentResolver().openInputStream(image);
806 if (is == null) {
807 throw new FileCopyException(R.string.error_not_an_image_file);
808 }
809 final Bitmap originalBitmap;
810 final BitmapFactory.Options options = new BitmapFactory.Options();
811 final int inSampleSize = (int) Math.pow(2, sampleSize);
812 Log.d(Config.LOGTAG, "reading bitmap with sample size " + inSampleSize);
813 options.inSampleSize = inSampleSize;
814 originalBitmap = BitmapFactory.decodeStream(is, null, options);
815 is.close();
816 if (originalBitmap == null) {
817 throw new ImageCompressionException("Source file was not an image");
818 }
819 if (!"image/jpeg".equals(options.outMimeType) && hasAlpha(originalBitmap)) {
820 originalBitmap.recycle();
821 throw new ImageCompressionException("Source file had alpha channel");
822 }
823 Bitmap scaledBitmap = resize(originalBitmap, Config.IMAGE_SIZE);
824 final int rotation = getRotation(image);
825 scaledBitmap = rotate(scaledBitmap, rotation);
826 boolean targetSizeReached = false;
827 int quality = Config.IMAGE_QUALITY;
828 final int imageMaxSize =
829 mXmppConnectionService
830 .getResources()
831 .getInteger(R.integer.auto_accept_filesize);
832 while (!targetSizeReached) {
833 os = new FileOutputStream(file);
834 Log.d(Config.LOGTAG, "compressing image with quality " + quality);
835 boolean success = scaledBitmap.compress(Config.IMAGE_FORMAT, quality, os);
836 if (!success) {
837 throw new FileCopyException(R.string.error_compressing_image);
838 }
839 os.flush();
840 final long fileSize = file.length();
841 Log.d(Config.LOGTAG, "achieved file size of " + fileSize);
842 targetSizeReached = fileSize <= imageMaxSize || quality <= 50;
843 quality -= 5;
844 }
845 scaledBitmap.recycle();
846 } catch (final FileNotFoundException e) {
847 cleanup(file);
848 throw new FileCopyException(R.string.error_file_not_found);
849 } catch (final IOException e) {
850 cleanup(file);
851 throw new FileCopyException(R.string.error_io_exception);
852 } catch (SecurityException e) {
853 cleanup(file);
854 throw new FileCopyException(R.string.error_security_exception_during_image_copy);
855 } catch (final OutOfMemoryError e) {
856 ++sampleSize;
857 if (sampleSize <= 3) {
858 copyImageToPrivateStorage(file, image, sampleSize);
859 } else {
860 throw new FileCopyException(R.string.error_out_of_memory);
861 }
862 } finally {
863 close(os);
864 close(is);
865 }
866 }
867
868 private static void cleanup(final File file) {
869 try {
870 file.delete();
871 } catch (Exception e) {
872
873 }
874 }
875
876 public void copyImageToPrivateStorage(File file, Uri image)
877 throws FileCopyException, ImageCompressionException {
878 Log.d(
879 Config.LOGTAG,
880 "copy image ("
881 + image.toString()
882 + ") to private storage "
883 + file.getAbsolutePath());
884 copyImageToPrivateStorage(file, image, 0);
885 }
886
887 public void copyImageToPrivateStorage(Message message, Uri image)
888 throws FileCopyException, ImageCompressionException {
889 final String filename;
890 switch (Config.IMAGE_FORMAT) {
891 case JPEG:
892 filename = String.format("%s.%s", message.getUuid(), "jpg");
893 break;
894 case PNG:
895 filename = String.format("%s.%s", message.getUuid(), "png");
896 break;
897 case WEBP:
898 filename = String.format("%s.%s", message.getUuid(), "webp");
899 break;
900 default:
901 throw new IllegalStateException("Unknown image format");
902 }
903 setupRelativeFilePath(message, filename);
904 final File tmp = getFile(message);
905 copyImageToPrivateStorage(tmp, image);
906 final String extension = MimeUtils.extractRelevantExtension(filename);
907 try {
908 setupRelativeFilePath(message, new FileInputStream(tmp), extension);
909 } catch (final FileNotFoundException e) {
910 throw new FileCopyException(R.string.error_file_not_found);
911 } catch (final IOException e) {
912 throw new FileCopyException(R.string.error_io_exception);
913 } catch (final XmppConnectionService.BlockedMediaException e) {
914 tmp.delete();
915 message.setRelativeFilePath(null);
916 message.setDeleted(true);
917 return;
918 }
919 tmp.renameTo(getFile(message));
920 updateFileParams(message, null, false);
921 }
922
923 public void setupRelativeFilePath(final Message message, final Uri uri, final String extension) throws FileCopyException, XmppConnectionService.BlockedMediaException {
924 try {
925 setupRelativeFilePath(message, mXmppConnectionService.getContentResolver().openInputStream(uri), extension);
926 } catch (final FileNotFoundException e) {
927 throw new FileCopyException(R.string.error_file_not_found);
928 } catch (final IOException e) {
929 throw new FileCopyException(R.string.error_io_exception);
930 }
931 }
932
933 public Cid[] calculateCids(final Uri uri) throws IOException {
934 return calculateCids(mXmppConnectionService.getContentResolver().openInputStream(uri));
935 }
936
937 public Cid[] calculateCids(final InputStream is) throws IOException {
938 try {
939 return CryptoHelper.cid(is, new String[]{"SHA-256", "SHA-1", "SHA-512"});
940 } catch (final NoSuchAlgorithmException e) {
941 throw new AssertionError(e);
942 }
943 }
944
945 public void setupRelativeFilePath(final Message message, final InputStream is, final String extension) throws IOException, XmppConnectionService.BlockedMediaException {
946 message.setRelativeFilePath(getStorageLocation(is, extension).getAbsolutePath());
947 }
948
949 public void setupRelativeFilePath(final Message message, final String filename) {
950 final String extension = MimeUtils.extractRelevantExtension(filename);
951 final String mime = MimeUtils.guessMimeTypeFromExtension(extension);
952 setupRelativeFilePath(message, filename, mime);
953 }
954
955 public File getStorageLocation(final InputStream is, final String extension) throws IOException, XmppConnectionService.BlockedMediaException {
956 final String mime = MimeUtils.guessMimeTypeFromExtension(extension);
957 Cid[] cids = calculateCids(is);
958
959 File file = getStorageLocation(String.format("%s.%s", cids[0], extension), mime);
960 for (int i = 0; i < cids.length; i++) {
961 mXmppConnectionService.saveCid(cids[i], file);
962 }
963 return file;
964 }
965
966 public File getStorageLocation(final String filename, final String mime) {
967 final File parentDirectory;
968 if (Strings.isNullOrEmpty(mime)) {
969 parentDirectory =
970 Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
971 } else if (mime.startsWith("image/")) {
972 parentDirectory =
973 Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
974 } else if (mime.startsWith("video/")) {
975 parentDirectory =
976 Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES);
977 } else if (MediaAdapter.DOCUMENT_MIMES.contains(mime)) {
978 parentDirectory =
979 Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS);
980 } else {
981 parentDirectory =
982 Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
983 }
984 final File appDirectory =
985 new File(parentDirectory, mXmppConnectionService.getString(R.string.app_name));
986 return new File(appDirectory, filename);
987 }
988
989 public static boolean inConversationsDirectory(final Context context, String path) {
990 final File fileDirectory = new File(path).getParentFile();
991 for (final String type : STORAGE_TYPES) {
992 final File typeDirectory =
993 new File(
994 Environment.getExternalStoragePublicDirectory(type),
995 context.getString(R.string.app_name));
996 if (typeDirectory.equals(fileDirectory)) {
997 return true;
998 }
999 }
1000 return false;
1001 }
1002
1003 public void setupRelativeFilePath(
1004 final Message message, final String filename, final String mime) {
1005 final File file = getStorageLocation(filename, mime);
1006 message.setRelativeFilePath(file.getAbsolutePath());
1007 }
1008
1009 public boolean unusualBounds(final Uri image) {
1010 try {
1011 final BitmapFactory.Options options = new BitmapFactory.Options();
1012 options.inJustDecodeBounds = true;
1013 final InputStream inputStream =
1014 mXmppConnectionService.getContentResolver().openInputStream(image);
1015 BitmapFactory.decodeStream(inputStream, null, options);
1016 close(inputStream);
1017 float ratio = (float) options.outHeight / options.outWidth;
1018 return ratio > (21.0f / 9.0f) || ratio < (9.0f / 21.0f);
1019 } catch (final Exception e) {
1020 Log.w(Config.LOGTAG, "unable to detect image bounds", e);
1021 return false;
1022 }
1023 }
1024
1025 private int getRotation(final File file) {
1026 try (final InputStream inputStream = new FileInputStream(file)) {
1027 return getRotation(inputStream);
1028 } catch (Exception e) {
1029 return 0;
1030 }
1031 }
1032
1033 private int getRotation(final Uri image) {
1034 try (final InputStream is =
1035 mXmppConnectionService.getContentResolver().openInputStream(image)) {
1036 return is == null ? 0 : getRotation(is);
1037 } catch (final Exception e) {
1038 return 0;
1039 }
1040 }
1041
1042 private static int getRotation(final InputStream inputStream) throws IOException {
1043 final ExifInterface exif = new ExifInterface(inputStream);
1044 final int orientation =
1045 exif.getAttributeInt(
1046 ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_UNDEFINED);
1047 switch (orientation) {
1048 case ExifInterface.ORIENTATION_ROTATE_180:
1049 return 180;
1050 case ExifInterface.ORIENTATION_ROTATE_90:
1051 return 90;
1052 case ExifInterface.ORIENTATION_ROTATE_270:
1053 return 270;
1054 default:
1055 return 0;
1056 }
1057 }
1058
1059 public BitmapDrawable getFallbackThumbnail(final Message message, int size) {
1060 List<Element> thumbs = message.getFileParams() != null ? message.getFileParams().getThumbnails() : null;
1061 if (thumbs != null && !thumbs.isEmpty()) {
1062 for (Element thumb : thumbs) {
1063 Uri uri = Uri.parse(thumb.getAttribute("uri"));
1064 if (uri.getScheme().equals("data")) {
1065 String[] parts = uri.getSchemeSpecificPart().split(",", 2);
1066 if (parts[0].equals("image/blurhash")) {
1067 final LruCache<String, Drawable> cache = mXmppConnectionService.getDrawableCache();
1068 BitmapDrawable cached = (BitmapDrawable) cache.get(parts[1]);
1069 if (cached != null) return cached;
1070
1071 int width = message.getFileParams().width;
1072 if (width < 1 && thumb.getAttribute("width") != null) width = Integer.parseInt(thumb.getAttribute("width"));
1073 if (width < 1) width = 1920;
1074
1075 int height = message.getFileParams().height;
1076 if (height < 1 && thumb.getAttribute("height") != null) height = Integer.parseInt(thumb.getAttribute("height"));
1077 if (height < 1) height = 1080;
1078 Rect r = rectForSize(width, height, size);
1079
1080 Bitmap blurhash = BlurHashDecoder.INSTANCE.decode(parts[1], r.width(), r.height(), 1.0f, false);
1081 if (blurhash != null) {
1082 cached = new BitmapDrawable(blurhash);
1083 cache.put(parts[1], cached);
1084 return cached;
1085 }
1086 }
1087 }
1088 }
1089 }
1090
1091 return null;
1092 }
1093
1094 public Drawable getThumbnail(Message message, Resources res, int size, boolean cacheOnly) throws IOException {
1095 final LruCache<String, Drawable> cache = mXmppConnectionService.getDrawableCache();
1096 DownloadableFile file = getFile(message);
1097 Drawable thumbnail = cache.get(file.getAbsolutePath());
1098 if (thumbnail != null) return thumbnail;
1099
1100 if ((thumbnail == null) && (!cacheOnly)) {
1101 synchronized (THUMBNAIL_LOCK) {
1102 List<Element> thumbs = message.getFileParams() != null ? message.getFileParams().getThumbnails() : null;
1103 if (thumbs != null && !thumbs.isEmpty()) {
1104 for (Element thumb : thumbs) {
1105 Uri uri = Uri.parse(thumb.getAttribute("uri"));
1106 if (uri.getScheme().equals("data")) {
1107 if (android.os.Build.VERSION.SDK_INT < 28) continue;
1108 String[] parts = uri.getSchemeSpecificPart().split(",", 2);
1109 if (parts[0].equals("image/blurhash")) continue; // blurhash only for fallback
1110
1111 byte[] data;
1112 if (Arrays.asList(parts[0].split(";")).contains("base64")) {
1113 data = Base64.decode(parts[1], 0);
1114 } else {
1115 data = parts[1].getBytes("UTF-8");
1116 }
1117
1118 ImageDecoder.Source source = ImageDecoder.createSource(ByteBuffer.wrap(data));
1119 thumbnail = ImageDecoder.decodeDrawable(source, (decoder, info, src) -> {
1120 int w = info.getSize().getWidth();
1121 int h = info.getSize().getHeight();
1122 Rect r = rectForSize(w, h, size);
1123 decoder.setTargetSize(r.width(), r.height());
1124 });
1125
1126 if (thumbnail != null) {
1127 cache.put(file.getAbsolutePath(), thumbnail);
1128 return thumbnail;
1129 }
1130 } else if (uri.getScheme().equals("cid")) {
1131 Cid cid = BobTransfer.cid(uri);
1132 if (cid == null) continue;
1133 DownloadableFile f = mXmppConnectionService.getFileForCid(cid);
1134 if (f != null && f.canRead()) {
1135 return getThumbnail(f, res, size, cacheOnly);
1136 }
1137 }
1138 }
1139 }
1140 }
1141 }
1142
1143 return getThumbnail(file, res, size, cacheOnly);
1144 }
1145
1146 public Drawable getThumbnail(DownloadableFile file, Resources res, int size, boolean cacheOnly) throws IOException {
1147 final LruCache<String, Drawable> cache = mXmppConnectionService.getDrawableCache();
1148 Drawable thumbnail = cache.get(file.getAbsolutePath());
1149 if ((thumbnail == null) && (!cacheOnly)) {
1150 synchronized (THUMBNAIL_LOCK) {
1151 thumbnail = cache.get(file.getAbsolutePath());
1152 if (thumbnail != null) {
1153 return thumbnail;
1154 }
1155 final String mime = file.getMimeType();
1156 if ("application/pdf".equals(mime)) {
1157 thumbnail = new BitmapDrawable(res, getPdfDocumentPreview(file, size));
1158 } else if (mime.startsWith("video/")) {
1159 thumbnail = new BitmapDrawable(res, getVideoPreview(file, size));
1160 } else {
1161 thumbnail = getImagePreview(file, res, size, mime);
1162 if (thumbnail == null) {
1163 throw new FileNotFoundException();
1164 }
1165 }
1166 cache.put(file.getAbsolutePath(), thumbnail);
1167 }
1168 }
1169 return thumbnail;
1170 }
1171
1172 public Bitmap getThumbnailBitmap(Message message, Resources res, int size) throws IOException {
1173 final Drawable drawable = getThumbnail(message, res, size, false);
1174 if (drawable == null) return null;
1175 return drawDrawable(drawable);
1176 }
1177
1178 public static Rect rectForSize(int w, int h, int size) {
1179 int scalledW;
1180 int scalledH;
1181 if (w <= h) {
1182 scalledW = Math.max((int) (w / ((double) h / size)), 1);
1183 scalledH = size;
1184 } else {
1185 scalledW = size;
1186 scalledH = Math.max((int) (h / ((double) w / size)), 1);
1187 }
1188
1189 if (scalledW > w || scalledH > h) return new Rect(0, 0, w, h);
1190
1191 return new Rect(0, 0, scalledW, scalledH);
1192 }
1193
1194 private Drawable getImagePreview(File file, Resources res, int size, final String mime) throws IOException {
1195 if (android.os.Build.VERSION.SDK_INT >= 28) {
1196 ImageDecoder.Source source = ImageDecoder.createSource(file);
1197 return ImageDecoder.decodeDrawable(source, (decoder, info, src) -> {
1198 int w = info.getSize().getWidth();
1199 int h = info.getSize().getHeight();
1200 Rect r = rectForSize(w, h, size);
1201 decoder.setTargetSize(r.width(), r.height());
1202 });
1203 } else {
1204 BitmapFactory.Options options = new BitmapFactory.Options();
1205 options.inSampleSize = calcSampleSize(file, size);
1206 Bitmap bitmap = null;
1207 try {
1208 bitmap = BitmapFactory.decodeFile(file.getAbsolutePath(), options);
1209 } catch (OutOfMemoryError e) {
1210 options.inSampleSize *= 2;
1211 bitmap = BitmapFactory.decodeFile(file.getAbsolutePath(), options);
1212 }
1213 if (bitmap == null) return null;
1214
1215 bitmap = resize(bitmap, size);
1216 bitmap = rotate(bitmap, getRotation(file));
1217 if (mime.equals("image/gif")) {
1218 Bitmap withGifOverlay = bitmap.copy(Bitmap.Config.ARGB_8888, true);
1219 drawOverlay(withGifOverlay, paintOverlayBlack(withGifOverlay) ? R.drawable.play_gif_black : R.drawable.play_gif_white, 1.0f);
1220 bitmap.recycle();
1221 bitmap = withGifOverlay;
1222 }
1223 return new BitmapDrawable(res, bitmap);
1224 }
1225 }
1226
1227 protected Bitmap drawDrawable(Drawable drawable) {
1228 Bitmap bitmap = null;
1229
1230 if (drawable instanceof BitmapDrawable) {
1231 bitmap = ((BitmapDrawable) drawable).getBitmap();
1232 if (bitmap != null) return bitmap;
1233 }
1234
1235 bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
1236 Canvas canvas = new Canvas(bitmap);
1237 drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
1238 drawable.draw(canvas);
1239 return bitmap;
1240 }
1241
1242 private void drawOverlay(Bitmap bitmap, int resource, float factor) {
1243 Bitmap overlay =
1244 BitmapFactory.decodeResource(mXmppConnectionService.getResources(), resource);
1245 Canvas canvas = new Canvas(bitmap);
1246 float targetSize = Math.min(canvas.getWidth(), canvas.getHeight()) * factor;
1247 Log.d(
1248 Config.LOGTAG,
1249 "target size overlay: "
1250 + targetSize
1251 + " overlay bitmap size was "
1252 + overlay.getHeight());
1253 float left = (canvas.getWidth() - targetSize) / 2.0f;
1254 float top = (canvas.getHeight() - targetSize) / 2.0f;
1255 RectF dst = new RectF(left, top, left + targetSize - 1, top + targetSize - 1);
1256 canvas.drawBitmap(overlay, null, dst, createAntiAliasingPaint());
1257 }
1258
1259 /** https://stackoverflow.com/a/3943023/210897 */
1260 private boolean paintOverlayBlack(final Bitmap bitmap) {
1261 final int h = bitmap.getHeight();
1262 final int w = bitmap.getWidth();
1263 int record = 0;
1264 for (int y = Math.round(h * IGNORE_PADDING); y < h - Math.round(h * IGNORE_PADDING); ++y) {
1265 for (int x = Math.round(w * IGNORE_PADDING);
1266 x < w - Math.round(w * IGNORE_PADDING);
1267 ++x) {
1268 int pixel = bitmap.getPixel(x, y);
1269 if ((Color.red(pixel) * 0.299
1270 + Color.green(pixel) * 0.587
1271 + Color.blue(pixel) * 0.114)
1272 > 186) {
1273 --record;
1274 } else {
1275 ++record;
1276 }
1277 }
1278 }
1279 return record < 0;
1280 }
1281
1282 private boolean paintOverlayBlackPdf(final Bitmap bitmap) {
1283 final int h = bitmap.getHeight();
1284 final int w = bitmap.getWidth();
1285 int white = 0;
1286 for (int y = 0; y < h; ++y) {
1287 for (int x = 0; x < w; ++x) {
1288 int pixel = bitmap.getPixel(x, y);
1289 if ((Color.red(pixel) * 0.299
1290 + Color.green(pixel) * 0.587
1291 + Color.blue(pixel) * 0.114)
1292 > 186) {
1293 white++;
1294 }
1295 }
1296 }
1297 return white > (h * w * 0.4f);
1298 }
1299
1300 private Bitmap cropCenterSquareVideo(Uri uri, int size) {
1301 MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
1302 Bitmap frame;
1303 try {
1304 metadataRetriever.setDataSource(mXmppConnectionService, uri);
1305 frame = metadataRetriever.getFrameAtTime(0);
1306 metadataRetriever.release();
1307 return cropCenterSquare(frame, size);
1308 } catch (Exception e) {
1309 frame = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
1310 frame.eraseColor(0xff000000);
1311 return frame;
1312 }
1313 }
1314
1315 private Bitmap getVideoPreview(final File file, final int size) {
1316 final MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
1317 Bitmap frame;
1318 try {
1319 metadataRetriever.setDataSource(file.getAbsolutePath());
1320 frame = metadataRetriever.getFrameAtTime(0);
1321 metadataRetriever.release();
1322 frame = resize(frame, size);
1323 } catch (IOException | RuntimeException e) {
1324 frame = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
1325 frame.eraseColor(0xff000000);
1326 }
1327 drawOverlay(
1328 frame,
1329 paintOverlayBlack(frame)
1330 ? R.drawable.play_video_black
1331 : R.drawable.play_video_white,
1332 0.75f);
1333 return frame;
1334 }
1335
1336 @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
1337 private Bitmap getPdfDocumentPreview(final File file, final int size) {
1338 try {
1339 final ParcelFileDescriptor fileDescriptor =
1340 ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);
1341 final Bitmap rendered = renderPdfDocument(fileDescriptor, size, true);
1342 drawOverlay(
1343 rendered,
1344 paintOverlayBlackPdf(rendered)
1345 ? R.drawable.open_pdf_black
1346 : R.drawable.open_pdf_white,
1347 0.75f);
1348 return rendered;
1349 } catch (final IOException | SecurityException e) {
1350 Log.d(Config.LOGTAG, "unable to render PDF document preview", e);
1351 final Bitmap placeholder = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
1352 placeholder.eraseColor(0xff000000);
1353 return placeholder;
1354 }
1355 }
1356
1357 @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
1358 private Bitmap cropCenterSquarePdf(final Uri uri, final int size) {
1359 try {
1360 ParcelFileDescriptor fileDescriptor =
1361 mXmppConnectionService.getContentResolver().openFileDescriptor(uri, "r");
1362 final Bitmap bitmap = renderPdfDocument(fileDescriptor, size, false);
1363 return cropCenterSquare(bitmap, size);
1364 } catch (Exception e) {
1365 final Bitmap placeholder = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
1366 placeholder.eraseColor(0xff000000);
1367 return placeholder;
1368 }
1369 }
1370
1371 @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
1372 private Bitmap renderPdfDocument(
1373 ParcelFileDescriptor fileDescriptor, int targetSize, boolean fit) throws IOException {
1374 final PdfRenderer pdfRenderer = new PdfRenderer(fileDescriptor);
1375 final PdfRenderer.Page page = pdfRenderer.openPage(0);
1376 final Dimensions dimensions =
1377 scalePdfDimensions(
1378 new Dimensions(page.getHeight(), page.getWidth()), targetSize, fit);
1379 final Bitmap rendered =
1380 Bitmap.createBitmap(dimensions.width, dimensions.height, Bitmap.Config.ARGB_8888);
1381 rendered.eraseColor(0xffffffff);
1382 page.render(rendered, null, null, PdfRenderer.Page.RENDER_MODE_FOR_DISPLAY);
1383 page.close();
1384 pdfRenderer.close();
1385 fileDescriptor.close();
1386 return rendered;
1387 }
1388
1389 public Uri getTakePhotoUri() {
1390 final String filename =
1391 String.format("IMG_%s.%s", IMAGE_DATE_FORMAT.format(new Date()), "jpg");
1392 final File directory;
1393 if (Config.ONLY_INTERNAL_STORAGE) {
1394 directory = new File(mXmppConnectionService.getCacheDir(), "Camera");
1395 } else {
1396 directory =
1397 new File(
1398 Environment.getExternalStoragePublicDirectory(
1399 Environment.DIRECTORY_DCIM),
1400 "Camera");
1401 }
1402 final File file = new File(directory, filename);
1403 file.getParentFile().mkdirs();
1404 return getUriForFile(mXmppConnectionService, file);
1405 }
1406
1407 public Avatar getPepAvatar(Uri image, int size, Bitmap.CompressFormat format) {
1408
1409 final Avatar uncompressAvatar = getUncompressedAvatar(image);
1410 if (uncompressAvatar != null
1411 && uncompressAvatar.image.length() <= Config.AVATAR_CHAR_LIMIT) {
1412 return uncompressAvatar;
1413 }
1414 if (uncompressAvatar != null) {
1415 Log.d(
1416 Config.LOGTAG,
1417 "uncompressed avatar exceeded char limit by "
1418 + (uncompressAvatar.image.length() - Config.AVATAR_CHAR_LIMIT));
1419 }
1420
1421 Bitmap bm = cropCenterSquare(image, size);
1422 if (bm == null) {
1423 return null;
1424 }
1425 if (hasAlpha(bm)) {
1426 Log.d(Config.LOGTAG, "alpha in avatar detected; uploading as PNG");
1427 bm.recycle();
1428 bm = cropCenterSquare(image, 96);
1429 return getPepAvatar(bm, Bitmap.CompressFormat.PNG, 100);
1430 }
1431 return getPepAvatar(bm, format, 100);
1432 }
1433
1434 private Avatar getUncompressedAvatar(Uri uri) {
1435 Bitmap bitmap = null;
1436 try {
1437 bitmap =
1438 BitmapFactory.decodeStream(
1439 mXmppConnectionService.getContentResolver().openInputStream(uri));
1440 return getPepAvatar(bitmap, Bitmap.CompressFormat.PNG, 100);
1441 } catch (Exception e) {
1442 return null;
1443 } finally {
1444 if (bitmap != null) {
1445 bitmap.recycle();
1446 }
1447 }
1448 }
1449
1450 private Avatar getPepAvatar(Bitmap bitmap, Bitmap.CompressFormat format, int quality) {
1451 try {
1452 ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
1453 Base64OutputStream mBase64OutputStream =
1454 new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
1455 MessageDigest digest = MessageDigest.getInstance("SHA-1");
1456 DigestOutputStream mDigestOutputStream =
1457 new DigestOutputStream(mBase64OutputStream, digest);
1458 if (!bitmap.compress(format, quality, mDigestOutputStream)) {
1459 return null;
1460 }
1461 mDigestOutputStream.flush();
1462 mDigestOutputStream.close();
1463 long chars = mByteArrayOutputStream.size();
1464 if (format != Bitmap.CompressFormat.PNG
1465 && quality >= 50
1466 && chars >= Config.AVATAR_CHAR_LIMIT) {
1467 int q = quality - 2;
1468 Log.d(
1469 Config.LOGTAG,
1470 "avatar char length was " + chars + " reducing quality to " + q);
1471 return getPepAvatar(bitmap, format, q);
1472 }
1473 Log.d(Config.LOGTAG, "settled on char length " + chars + " with quality=" + quality);
1474 final Avatar avatar = new Avatar();
1475 avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
1476 avatar.image = new String(mByteArrayOutputStream.toByteArray());
1477 if (format.equals(Bitmap.CompressFormat.WEBP)) {
1478 avatar.type = "image/webp";
1479 } else if (format.equals(Bitmap.CompressFormat.JPEG)) {
1480 avatar.type = "image/jpeg";
1481 } else if (format.equals(Bitmap.CompressFormat.PNG)) {
1482 avatar.type = "image/png";
1483 }
1484 avatar.width = bitmap.getWidth();
1485 avatar.height = bitmap.getHeight();
1486 return avatar;
1487 } catch (OutOfMemoryError e) {
1488 Log.d(Config.LOGTAG, "unable to convert avatar to base64 due to low memory");
1489 return null;
1490 } catch (Exception e) {
1491 return null;
1492 }
1493 }
1494
1495 public Avatar getStoredPepAvatar(String hash) {
1496 if (hash == null) {
1497 return null;
1498 }
1499 Avatar avatar = new Avatar();
1500 final File file = getAvatarFile(hash);
1501 FileInputStream is = null;
1502 try {
1503 avatar.size = file.length();
1504 BitmapFactory.Options options = new BitmapFactory.Options();
1505 options.inJustDecodeBounds = true;
1506 BitmapFactory.decodeFile(file.getAbsolutePath(), options);
1507 is = new FileInputStream(file);
1508 ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
1509 Base64OutputStream mBase64OutputStream =
1510 new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
1511 MessageDigest digest = MessageDigest.getInstance("SHA-1");
1512 DigestOutputStream os = new DigestOutputStream(mBase64OutputStream, digest);
1513 byte[] buffer = new byte[4096];
1514 int length;
1515 while ((length = is.read(buffer)) > 0) {
1516 os.write(buffer, 0, length);
1517 }
1518 os.flush();
1519 os.close();
1520 avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
1521 avatar.image = new String(mByteArrayOutputStream.toByteArray());
1522 avatar.height = options.outHeight;
1523 avatar.width = options.outWidth;
1524 avatar.type = options.outMimeType;
1525 return avatar;
1526 } catch (NoSuchAlgorithmException | IOException e) {
1527 return null;
1528 } finally {
1529 close(is);
1530 }
1531 }
1532
1533 public boolean isAvatarCached(Avatar avatar) {
1534 final File file = getAvatarFile(avatar.getFilename());
1535 return file.exists();
1536 }
1537
1538 public boolean save(final Avatar avatar) {
1539 File file;
1540 if (isAvatarCached(avatar)) {
1541 file = getAvatarFile(avatar.getFilename());
1542 avatar.size = file.length();
1543 } else {
1544 file =
1545 new File(
1546 mXmppConnectionService.getCacheDir().getAbsolutePath()
1547 + "/"
1548 + UUID.randomUUID().toString());
1549 if (file.getParentFile().mkdirs()) {
1550 Log.d(Config.LOGTAG, "created cache directory");
1551 }
1552 OutputStream os = null;
1553 try {
1554 if (!file.createNewFile()) {
1555 Log.d(
1556 Config.LOGTAG,
1557 "unable to create temporary file " + file.getAbsolutePath());
1558 }
1559 os = new FileOutputStream(file);
1560 MessageDigest digest = MessageDigest.getInstance("SHA-1");
1561 digest.reset();
1562 DigestOutputStream mDigestOutputStream = new DigestOutputStream(os, digest);
1563 final byte[] bytes = avatar.getImageAsBytes();
1564 mDigestOutputStream.write(bytes);
1565 mDigestOutputStream.flush();
1566 mDigestOutputStream.close();
1567 String sha1sum = CryptoHelper.bytesToHex(digest.digest());
1568 if (sha1sum.equals(avatar.sha1sum)) {
1569 final File outputFile = getAvatarFile(avatar.getFilename());
1570 if (outputFile.getParentFile().mkdirs()) {
1571 Log.d(Config.LOGTAG, "created avatar directory");
1572 }
1573 final File avatarFile = getAvatarFile(avatar.getFilename());
1574 if (!file.renameTo(avatarFile)) {
1575 Log.d(
1576 Config.LOGTAG,
1577 "unable to rename " + file.getAbsolutePath() + " to " + outputFile);
1578 return false;
1579 }
1580 } else {
1581 Log.d(Config.LOGTAG, "sha1sum mismatch for " + avatar.owner);
1582 if (!file.delete()) {
1583 Log.d(Config.LOGTAG, "unable to delete temporary file");
1584 }
1585 return false;
1586 }
1587 avatar.size = bytes.length;
1588 } catch (IllegalArgumentException | IOException | NoSuchAlgorithmException e) {
1589 return false;
1590 } finally {
1591 close(os);
1592 }
1593 }
1594 return true;
1595 }
1596
1597 public void deleteHistoricAvatarPath() {
1598 delete(getHistoricAvatarPath());
1599 }
1600
1601 private void delete(final File file) {
1602 if (file.isDirectory()) {
1603 final File[] files = file.listFiles();
1604 if (files != null) {
1605 for (final File f : files) {
1606 delete(f);
1607 }
1608 }
1609 }
1610 if (file.delete()) {
1611 Log.d(Config.LOGTAG, "deleted " + file.getAbsolutePath());
1612 }
1613 }
1614
1615 private File getHistoricAvatarPath() {
1616 return new File(mXmppConnectionService.getFilesDir(), "/avatars/");
1617 }
1618
1619 public File getAvatarFile(String avatar) {
1620 return new File(mXmppConnectionService.getCacheDir(), "/avatars/" + avatar);
1621 }
1622
1623 public Uri getAvatarUri(String avatar) {
1624 return Uri.fromFile(getAvatarFile(avatar));
1625 }
1626
1627 public Bitmap cropCenterSquare(Uri image, int size) {
1628 if (image == null) {
1629 return null;
1630 }
1631 InputStream is = null;
1632 try {
1633 BitmapFactory.Options options = new BitmapFactory.Options();
1634 options.inSampleSize = calcSampleSize(image, size);
1635 is = mXmppConnectionService.getContentResolver().openInputStream(image);
1636 if (is == null) {
1637 return null;
1638 }
1639 Bitmap input = BitmapFactory.decodeStream(is, null, options);
1640 if (input == null) {
1641 return null;
1642 } else {
1643 input = rotate(input, getRotation(image));
1644 return cropCenterSquare(input, size);
1645 }
1646 } catch (FileNotFoundException | SecurityException e) {
1647 Log.d(Config.LOGTAG, "unable to open file " + image.toString(), e);
1648 return null;
1649 } finally {
1650 close(is);
1651 }
1652 }
1653
1654 public Bitmap cropCenter(Uri image, int newHeight, int newWidth) {
1655 if (image == null) {
1656 return null;
1657 }
1658 InputStream is = null;
1659 try {
1660 BitmapFactory.Options options = new BitmapFactory.Options();
1661 options.inSampleSize = calcSampleSize(image, Math.max(newHeight, newWidth));
1662 is = mXmppConnectionService.getContentResolver().openInputStream(image);
1663 if (is == null) {
1664 return null;
1665 }
1666 Bitmap source = BitmapFactory.decodeStream(is, null, options);
1667 if (source == null) {
1668 return null;
1669 }
1670 int sourceWidth = source.getWidth();
1671 int sourceHeight = source.getHeight();
1672 float xScale = (float) newWidth / sourceWidth;
1673 float yScale = (float) newHeight / sourceHeight;
1674 float scale = Math.max(xScale, yScale);
1675 float scaledWidth = scale * sourceWidth;
1676 float scaledHeight = scale * sourceHeight;
1677 float left = (newWidth - scaledWidth) / 2;
1678 float top = (newHeight - scaledHeight) / 2;
1679
1680 RectF targetRect = new RectF(left, top, left + scaledWidth, top + scaledHeight);
1681 Bitmap dest = Bitmap.createBitmap(newWidth, newHeight, Bitmap.Config.ARGB_8888);
1682 Canvas canvas = new Canvas(dest);
1683 canvas.drawBitmap(source, null, targetRect, createAntiAliasingPaint());
1684 if (source.isRecycled()) {
1685 source.recycle();
1686 }
1687 return dest;
1688 } catch (SecurityException e) {
1689 return null; // android 6.0 with revoked permissions for example
1690 } catch (FileNotFoundException e) {
1691 return null;
1692 } finally {
1693 close(is);
1694 }
1695 }
1696
1697 public Bitmap cropCenterSquare(Bitmap input, int size) {
1698 int w = input.getWidth();
1699 int h = input.getHeight();
1700
1701 float scale = Math.max((float) size / h, (float) size / w);
1702
1703 float outWidth = scale * w;
1704 float outHeight = scale * h;
1705 float left = (size - outWidth) / 2;
1706 float top = (size - outHeight) / 2;
1707 RectF target = new RectF(left, top, left + outWidth, top + outHeight);
1708
1709 Bitmap output = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
1710 Canvas canvas = new Canvas(output);
1711 canvas.drawBitmap(input, null, target, createAntiAliasingPaint());
1712 if (!input.isRecycled()) {
1713 input.recycle();
1714 }
1715 return output;
1716 }
1717
1718 private int calcSampleSize(Uri image, int size)
1719 throws FileNotFoundException, SecurityException {
1720 final BitmapFactory.Options options = new BitmapFactory.Options();
1721 options.inJustDecodeBounds = true;
1722 final InputStream inputStream =
1723 mXmppConnectionService.getContentResolver().openInputStream(image);
1724 BitmapFactory.decodeStream(inputStream, null, options);
1725 close(inputStream);
1726 return calcSampleSize(options, size);
1727 }
1728
1729 public void updateFileParams(Message message) {
1730 updateFileParams(message, null);
1731 }
1732
1733 public void updateFileParams(final Message message, final String url) {
1734 updateFileParams(message, url, true);
1735 }
1736
1737 public void updateFileParams(final Message message, String url, boolean updateCids) {
1738 final boolean encrypted =
1739 message.getEncryption() == Message.ENCRYPTION_PGP
1740 || message.getEncryption() == Message.ENCRYPTION_DECRYPTED;
1741 final DownloadableFile file = getFile(message);
1742 Cid[] cids = new Cid[0];
1743 try {
1744 cids = calculateCids(new FileInputStream(file));
1745 } catch (final IOException e) { }
1746 final String mime = file.getMimeType();
1747 final boolean privateMessage = message.isPrivateMessage();
1748 final boolean image =
1749 message.getType() == Message.TYPE_IMAGE
1750 || (mime != null && mime.startsWith("image/"));
1751 Message.FileParams fileParams = message.getFileParams();
1752 if (fileParams == null) fileParams = new Message.FileParams();
1753 if (url == null) {
1754 for (Cid cid : cids) {
1755 url = mXmppConnectionService.getUrlForCid(cid);
1756 if (url != null) {
1757 fileParams.url = url;
1758 break;
1759 }
1760 }
1761 } else {
1762 fileParams.url = url;
1763 }
1764 if (encrypted && !file.exists()) {
1765 Log.d(Config.LOGTAG, "skipping updateFileParams because file is encrypted");
1766 final DownloadableFile encryptedFile = getFile(message, false);
1767 fileParams.size = encryptedFile.getSize();
1768 } else {
1769 Log.d(Config.LOGTAG, "running updateFileParams");
1770 final boolean ambiguous = MimeUtils.AMBIGUOUS_CONTAINER_FORMATS.contains(mime);
1771 final boolean video = mime != null && mime.startsWith("video/");
1772 final boolean audio = mime != null && mime.startsWith("audio/");
1773 final boolean pdf = "application/pdf".equals(mime);
1774 fileParams.size = file.getSize();
1775 if (ambiguous) {
1776 try {
1777 final Dimensions dimensions = getVideoDimensions(file);
1778 if (dimensions.valid()) {
1779 Log.d(Config.LOGTAG, "ambiguous file " + mime + " is video");
1780 fileParams.width = dimensions.width;
1781 fileParams.height = dimensions.height;
1782 } else {
1783 Log.d(Config.LOGTAG, "ambiguous file " + mime + " is audio");
1784 fileParams.runtime = getMediaRuntime(file);
1785 }
1786 } catch (final NotAVideoFile e) {
1787 Log.d(Config.LOGTAG, "ambiguous file " + mime + " is audio");
1788 fileParams.runtime = getMediaRuntime(file);
1789 }
1790 } else if (image || video || pdf) {
1791 try {
1792 final Dimensions dimensions;
1793 if (video) {
1794 dimensions = getVideoDimensions(file);
1795 } else if (pdf) {
1796 dimensions = getPdfDocumentDimensions(file);
1797 } else {
1798 dimensions = getImageDimensions(file);
1799 }
1800 if (dimensions.valid()) {
1801 fileParams.width = dimensions.width;
1802 fileParams.height = dimensions.height;
1803 }
1804 } catch (NotAVideoFile notAVideoFile) {
1805 Log.d(
1806 Config.LOGTAG,
1807 "file with mime type " + file.getMimeType() + " was not a video file");
1808 // fall threw
1809 }
1810 } else if (audio) {
1811 fileParams.runtime = getMediaRuntime(file);
1812 }
1813 }
1814 message.setFileParams(fileParams);
1815 message.setDeleted(false);
1816 message.setType(
1817 privateMessage
1818 ? Message.TYPE_PRIVATE_FILE
1819 : (image ? Message.TYPE_IMAGE : Message.TYPE_FILE));
1820
1821 if (updateCids) {
1822 try {
1823 for (int i = 0; i < cids.length; i++) {
1824 mXmppConnectionService.saveCid(cids[i], file, url);
1825 }
1826 } catch (XmppConnectionService.BlockedMediaException e) { }
1827 }
1828 }
1829
1830 private int getMediaRuntime(final File file) {
1831 try {
1832 final MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
1833 mediaMetadataRetriever.setDataSource(file.toString());
1834 final String value =
1835 mediaMetadataRetriever.extractMetadata(
1836 MediaMetadataRetriever.METADATA_KEY_DURATION);
1837 if (Strings.isNullOrEmpty(value)) {
1838 return 0;
1839 }
1840 return Integer.parseInt(value);
1841 } catch (final Exception e) {
1842 return 0;
1843 }
1844 }
1845
1846 private Dimensions getImageDimensions(File file) {
1847 final BitmapFactory.Options options = new BitmapFactory.Options();
1848 options.inJustDecodeBounds = true;
1849 BitmapFactory.decodeFile(file.getAbsolutePath(), options);
1850 final int rotation = getRotation(file);
1851 final boolean rotated = rotation == 90 || rotation == 270;
1852 final int imageHeight = rotated ? options.outWidth : options.outHeight;
1853 final int imageWidth = rotated ? options.outHeight : options.outWidth;
1854 return new Dimensions(imageHeight, imageWidth);
1855 }
1856
1857 private Dimensions getVideoDimensions(File file) throws NotAVideoFile {
1858 MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
1859 try {
1860 metadataRetriever.setDataSource(file.getAbsolutePath());
1861 } catch (RuntimeException e) {
1862 throw new NotAVideoFile(e);
1863 }
1864 return getVideoDimensions(metadataRetriever);
1865 }
1866
1867 private Dimensions getPdfDocumentDimensions(final File file) {
1868 final ParcelFileDescriptor fileDescriptor;
1869 try {
1870 fileDescriptor = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);
1871 if (fileDescriptor == null) {
1872 return new Dimensions(0, 0);
1873 }
1874 } catch (final FileNotFoundException e) {
1875 return new Dimensions(0, 0);
1876 }
1877 try {
1878 final PdfRenderer pdfRenderer = new PdfRenderer(fileDescriptor);
1879 final PdfRenderer.Page page = pdfRenderer.openPage(0);
1880 final int height = page.getHeight();
1881 final int width = page.getWidth();
1882 page.close();
1883 pdfRenderer.close();
1884 return scalePdfDimensions(new Dimensions(height, width));
1885 } catch (final IOException | SecurityException e) {
1886 Log.d(Config.LOGTAG, "unable to get dimensions for pdf document", e);
1887 return new Dimensions(0, 0);
1888 }
1889 }
1890
1891 private Dimensions scalePdfDimensions(Dimensions in) {
1892 final DisplayMetrics displayMetrics =
1893 mXmppConnectionService.getResources().getDisplayMetrics();
1894 final int target = (int) (displayMetrics.density * 288);
1895 return scalePdfDimensions(in, target, true);
1896 }
1897
1898 private static Dimensions scalePdfDimensions(
1899 final Dimensions in, final int target, final boolean fit) {
1900 final int w, h;
1901 if (fit == (in.width <= in.height)) {
1902 w = Math.max((int) (in.width / ((double) in.height / target)), 1);
1903 h = target;
1904 } else {
1905 w = target;
1906 h = Math.max((int) (in.height / ((double) in.width / target)), 1);
1907 }
1908 return new Dimensions(h, w);
1909 }
1910
1911 public Bitmap getAvatar(String avatar, int size) {
1912 if (avatar == null) {
1913 return null;
1914 }
1915 Bitmap bm = cropCenter(getAvatarUri(avatar), size, size);
1916 return bm;
1917 }
1918
1919 private static class Dimensions {
1920 public final int width;
1921 public final int height;
1922
1923 Dimensions(int height, int width) {
1924 this.width = width;
1925 this.height = height;
1926 }
1927
1928 public int getMin() {
1929 return Math.min(width, height);
1930 }
1931
1932 public boolean valid() {
1933 return width > 0 && height > 0;
1934 }
1935 }
1936
1937 private static class NotAVideoFile extends Exception {
1938 public NotAVideoFile(Throwable t) {
1939 super(t);
1940 }
1941
1942 public NotAVideoFile() {
1943 super();
1944 }
1945 }
1946
1947 public static class ImageCompressionException extends Exception {
1948
1949 ImageCompressionException(String message) {
1950 super(message);
1951 }
1952 }
1953
1954 public static class FileCopyException extends Exception {
1955 private final int resId;
1956
1957 private FileCopyException(@StringRes int resId) {
1958 this.resId = resId;
1959 }
1960
1961 public @StringRes int getResId() {
1962 return resId;
1963 }
1964 }
1965}