Support gif

lib/entity/file_util.dart

@@ -30,6 +30,7 @@ const _supportedFormatMimes = [
   "image/png",
   "image/webp",
   "image/heic",
+  "image/gif",
   // video player currently doesn't work on web
   if (!platform_k.isWeb) "video/mp4",
 ];

lib/widget/album_viewer.dart

@@ -300,6 +300,7 @@ class _AlbumViewerState extends State<AlbumViewer>
             width: _thumbSize, height: _thumbSize);
         if (file_util.isSupportedImageFormat(f)) {
           yield _ImageListItem(
+            file: f,
             account: widget.account,
             previewUrl: previewUrl,
             onTap: () => _onItemTap(i),
@@ -368,6 +369,7 @@ class _AlbumViewerState extends State<AlbumViewer>
 
 class _ImageListItem extends SelectableItemStreamListItem {
   _ImageListItem({
+    @required this.file,
     @required this.account,
     @required this.previewUrl,
     VoidCallback onTap,
@@ -378,9 +380,11 @@ class _ImageListItem extends SelectableItemStreamListItem {
     return PhotoListImage(
       account: account,
       previewUrl: previewUrl,
+      isGif: file.contentType == "image/gif",
     );
   }
 
+  final File file;
   final Account account;
   final String previewUrl;
 }

lib/widget/archive_viewer.dart

@@ -341,6 +341,7 @@ class _ImageListItem extends _FileListItem {
     return PhotoListImage(
       account: account,
       previewUrl: previewUrl,
+      isGif: file.contentType == "image/gif",
     );
   }
 

lib/widget/home_photos.dart

@@ -639,6 +639,7 @@ class _ImageListItem extends _FileListItem {
     return PhotoListImage(
       account: account,
       previewUrl: previewUrl,
+      isGif: file.contentType == "image/gif",
     );
   }
 

lib/widget/image_viewer.dart

@@ -210,10 +210,16 @@ class _ImageViewerState extends State<ImageViewer>
   static final _log = Logger("widget.image_viewer._ImageViewerState");
 }
 
-String _getImageUrl(Account account, File file) => api_util.getFilePreviewUrl(
+String _getImageUrl(Account account, File file) {
+  if (file.contentType == "image/gif") {
+    return api_util.getFileUrl(account, file);
+  } else {
+    return api_util.getFilePreviewUrl(
       account,
       file,
       width: 1080,
       height: 1080,
       a: true,
     );
+  }
+}

lib/widget/photo_list_item.dart

@@ -10,6 +10,7 @@ class PhotoListImage extends StatelessWidget {
     Key key,
     @required this.account,
     @required this.previewUrl,
+    this.isGif = false,
   }) : super(key: key);
 
   @override
@@ -17,7 +18,9 @@ class PhotoListImage extends StatelessWidget {
     return FittedBox(
       clipBehavior: Clip.hardEdge,
       fit: BoxFit.cover,
-      child: Container(
+      child: Stack(
+        children: [
+          Container(
             // arbitrary size here
             constraints: BoxConstraints.tight(const Size(128, 128)),
             color: AppTheme.getListItemBackgroundColor(context),
@@ -45,11 +48,26 @@ class PhotoListImage extends StatelessWidget {
               imageRenderMethodForWeb: ImageRenderMethodForWeb.HttpGet,
             ),
           ),
+          if (isGif)
+            Container(
+              // arbitrary size here
+              constraints: BoxConstraints.tight(const Size(128, 128)),
+              alignment: AlignmentDirectional.topEnd,
+              padding: const EdgeInsets.symmetric(horizontal: 2),
+              child: const Icon(
+                Icons.gif,
+                size: 36,
+                color: Colors.white,
+              ),
+            ),
+        ],
+      ),
     );
   }
 
   final Account account;
   final String previewUrl;
+  final bool isGif;
 }
 
 class PhotoListVideo extends StatelessWidget {