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fix: Thumbnails in the image bubble not always showing a cached thumbnail

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When in the timeline an image bubble with animated=false was displayed and
you tapped on an image, it would attempt to show the thumbnail with animated=true.
This thumbnail, of course, was not cached, thus not showing the cached image, and
actually downloading the thumbnail multiple times. This PR fixes that by
first checking if the animated=false thumbnail is cached, and if so, display
that while the final image is loading.
This commit is contained in:
Sorunome 2021-11-30 14:40:03 +01:00
parent 745d94f46f
commit e7b4c6f848
No known key found for this signature in database
GPG Key ID: B19471D07FC9BE9C
1 changed files with 36 additions and 9 deletions
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45
lib/pages/chat/events/image_bubble.dart
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@ -4,6 +4,7 @@ import 'package:flutter/material.dart';
import 'package:cached_network_image/cached_network_image.dart';
import 'package:flutter_blurhash/flutter_blurhash.dart';
import 'package:flutter_cache_manager/flutter_cache_manager.dart';
import 'package:flutter_gen/gen_l10n/l10n.dart';
import 'package:flutter_svg/flutter_svg.dart';
import 'package:lottie/lottie.dart';
@ -48,6 +49,8 @@ class ImageBubble extends StatefulWidget {
class _ImageBubbleState extends State<ImageBubble> {
// for plaintext: holds the http URL for the thumbnail
String thumbnailUrl;
// for plaintext. holds the http URL for the thumbnial, without the animated flag
String thumbnailUrlNoAnimated;
// for plaintext: holds the http URL of the original
String attachmentUrl;
MatrixFile _file;
@ -166,6 +169,9 @@ class _ImageBubbleState extends State<ImageBubble> {
thumbnailUrl = widget.event
.getAttachmentUrl(getThumbnail: true, animated: widget.animated)
?.toString();
thumbnailUrlNoAnimated = widget.event
.getAttachmentUrl(getThumbnail: true, animated: false)
?.toString();
attachmentUrl =
widget.event.getAttachmentUrl(animated: widget.animated)?.toString();
if (thumbnailUrl == null) {
@ -304,15 +310,30 @@ class _ImageBubbleState extends State<ImageBubble> {
displayUrl != thumbnailUrl &&
displayUrl == attachmentUrl) {
// we have to display the thumbnail while loading
return CachedNetworkImage(
key: ValueKey(thumbnailUrl),
imageUrl: thumbnailUrl,
placeholder: (c, u) => getPlaceholderWidget(),
imageBuilder: (context, imageProvider) => Image(
image: imageProvider,
frameBuilder: frameBuilder,
fit: widget.fit,
),
return FutureBuilder<bool>(
future: (() async {
return await DefaultCacheManager()
.getFileFromCache(thumbnailUrl) !=
null;
})(),
builder: (BuildContext context, AsyncSnapshot<bool> snapshot) {
if (!snapshot.hasData) {
return getPlaceholderWidget();
}
final effectiveUrl = snapshot.data == true
? thumbnailUrl
: thumbnailUrlNoAnimated;
return CachedNetworkImage(
key: ValueKey(effectiveUrl),
imageUrl: effectiveUrl,
placeholder: (c, u) => getPlaceholderWidget(),
imageBuilder: (context, imageProvider) => Image(
image: imageProvider,
frameBuilder: frameBuilder,
fit: widget.fit,
),
);
},
);
}
return getPlaceholderWidget();
@ -335,6 +356,12 @@ class _ImageBubbleState extends State<ImageBubble> {
useThumbnailMxcUrl: true,
animated: widget.animated)
?.toString();
thumbnailUrlNoAnimated = widget.event
.getAttachmentUrl(
getThumbnail: true,
useThumbnailMxcUrl: true,
animated: false)
?.toString();
attachmentUrl = widget.event
.getAttachmentUrl(
useThumbnailMxcUrl: true, animated: widget.animated)