fix: Image viewer

lib/config/routes.dart

@@ -1,6 +1,5 @@
 import 'package:fluffychat/pages/archive.dart';
 import 'package:fluffychat/pages/homeserver_picker.dart';
-import 'package:fluffychat/pages/image_viewer.dart';
 import 'package:fluffychat/pages/invitation_selection.dart';
 import 'package:fluffychat/pages/settings_emotes.dart';
 import 'package:fluffychat/pages/settings_multiple_emotes.dart';
@@ -52,11 +51,6 @@ class AppRoutes {
           widget: ChatList(),
           stackedRoutes: [
             VWidget(path: ':roomid', widget: Chat(), stackedRoutes: [
-              VWidget(
-                path: 'image/:eventid',
-                widget: ImageViewer(),
-                buildTransition: _fadeTransition,
-              ),
               VWidget(
                 path: 'encryption',
                 widget: ChatEncryptionSettings(),
@@ -132,11 +126,6 @@ class AppRoutes {
                       widget: EmptyPage(),
                       buildTransition: _fadeTransition,
                     ),
-                    VWidget(
-                      path: 'image/:eventid',
-                      widget: ImageViewer(),
-                      buildTransition: _fadeTransition,
-                    ),
                     VWidget(
                       path: 'encryption',
                       widget: ChatEncryptionSettings(),

lib/pages/image_viewer.dart

@@ -8,9 +8,10 @@ import 'package:vrouter/vrouter.dart';
 import '../utils/matrix_sdk_extensions.dart/event_extension.dart';
 
 class ImageViewer extends StatefulWidget {
+  final Event event;
   final void Function() onLoaded;
 
-  const ImageViewer({Key key, this.onLoaded}) : super(key: key);
+  const ImageViewer(this.event, {Key key, this.onLoaded}) : super(key: key);
 
   @override
   ImageViewerController createState() => ImageViewerController();
@@ -18,14 +19,13 @@ class ImageViewer extends StatefulWidget {
 
 class ImageViewerController extends State<ImageViewer> {
   /// Forward this image to another room.
-  void forwardAction(Event event) {
+  void forwardAction() {
-    Matrix.of(context).shareContent = event.content;
+    Matrix.of(context).shareContent = widget.event.content;
     VRouter.of(context).push('/rooms');
   }
 
   /// Open this file with a system call.
-  void openFileAction(Event event) =>
+  void openFileAction() => widget.event.openFile(context, downloadOnly: true);
-      event.openFile(context, downloadOnly: true);
 
   /// Go back if user swiped it away
   void onInteractionEnds(ScaleEndDetails endDetails) {
@@ -37,16 +37,6 @@ class ImageViewerController extends State<ImageViewer> {
     }
   }
 
-  Future<Event> getEvent() {
-    final roomId = VRouter.of(context).pathParameters['roomid'];
-    final eventId = VRouter.of(context).pathParameters['eventid'];
-    return Matrix.of(context).client.database.getEventById(
-          Matrix.of(context).client.id,
-          eventId,
-          Matrix.of(context).client.getRoomById(roomId),
-        );
-  }
-
   @override
   Widget build(BuildContext context) => ImageViewerView(this);
 }

lib/pages/views/image_viewer_view.dart

@@ -1,5 +1,3 @@
-import 'package:famedlysdk/famedlysdk.dart';
-
 import '../image_viewer.dart';
 import 'package:fluffychat/widgets/event_content/image_bubble.dart';
 import 'package:flutter/material.dart';
@@ -12,49 +10,28 @@ class ImageViewerView extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return FutureBuilder<Event>(
-        future: controller.getEvent(),
-        builder: (context, snapshot) {
-          if (!snapshot.hasData) {
-            return Scaffold(
-              backgroundColor: Colors.black,
-              appBar: AppBar(
-                elevation: 0,
-                backgroundColor: Color(0x44000000),
-              ),
-              body: Center(
-                  child: snapshot.hasError
-                      ? Text(
-                          L10n.of(context).oopsSomethingWentWrong,
-                          style: TextStyle(color: Colors.white),
-                          textAlign: TextAlign.center,
-                        )
-                      : CircularProgressIndicator()),
-            );
-          }
-          final event = snapshot.data;
     return Scaffold(
       backgroundColor: Colors.black,
       extendBodyBehindAppBar: true,
       appBar: AppBar(
         elevation: 0,
-              backgroundColor: Color(0x44000000),
         leading: IconButton(
           icon: Icon(Icons.close),
-                onPressed: Navigator.of(context, rootNavigator: false).pop,
+          onPressed: Navigator.of(context).pop,
           color: Colors.white,
           tooltip: L10n.of(context).close,
         ),
+        backgroundColor: Color(0x44000000),
         actions: [
           IconButton(
             icon: Icon(Icons.reply_outlined),
-                  onPressed: () => controller.forwardAction(event),
+            onPressed: controller.forwardAction,
             color: Colors.white,
             tooltip: L10n.of(context).share,
           ),
           IconButton(
             icon: Icon(Icons.download_outlined),
-                  onPressed: () => controller.openFileAction(event),
+            onPressed: controller.openFileAction,
             color: Colors.white,
             tooltip: L10n.of(context).downloadFile,
           ),
@@ -66,7 +43,7 @@ class ImageViewerView extends StatelessWidget {
         onInteractionEnd: controller.onInteractionEnds,
         child: Center(
           child: ImageBubble(
-                  event,
+            controller.widget.event,
             tapToView: false,
             onLoaded: controller.widget.onLoaded,
             fit: BoxFit.contain,
@@ -78,6 +55,5 @@ class ImageViewerView extends StatelessWidget {
         ),
       ),
     );
-        });
   }
 }

lib/utils/matrix_sdk_extensions.dart/event_extension.dart

@@ -3,14 +3,16 @@ import 'package:future_loading_dialog/future_loading_dialog.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_cache_manager/flutter_cache_manager.dart';
-import 'package:vrouter/vrouter.dart';
 import 'matrix_file_extension.dart';
+import '../../pages/image_viewer.dart';
 
 extension LocalizedBody on Event {
   void openFile(BuildContext context, {bool downloadOnly = false}) async {
     if (!downloadOnly &&
         [MessageTypes.Image, MessageTypes.Sticker].contains(messageType)) {
-      VRouter.of(context).push('/rooms/${room.id}/image/$eventId');
+      await Navigator.of(context, rootNavigator: true).push(
+        MaterialPageRoute(builder: (_) => ImageViewer(this)),
+      );
       return;
     }
     final matrixFile = await showFutureLoadingDialog(

lib/widgets/event_content/image_bubble.dart

@@ -1,10 +1,10 @@
 import 'package:famedlysdk/famedlysdk.dart';
+import 'package:fluffychat/pages/image_viewer.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter_blurhash/flutter_blurhash.dart';
 import 'package:cached_network_image/cached_network_image.dart';
 import 'package:flutter_svg/flutter_svg.dart';
-import 'package:vrouter/vrouter.dart';
 
 import '../../utils/matrix_sdk_extensions.dart/event_extension.dart';
 
@@ -237,8 +237,23 @@ class _ImageBubbleState extends State<ImageBubble> {
       child: InkWell(
         onTap: () {
           if (!widget.tapToView) return;
-          VRouter.of(context).push(
+          Navigator.of(context, rootNavigator: true).push(
-              '/rooms/${widget.event.room.id}/image/${widget.event.eventId}');
+            MaterialPageRoute(
+              builder: (_) => ImageViewer(widget.event, onLoaded: () {
+                // If the original file didn't load yet, we want to do that now.
+                // This is so that the original file displays after going on the image viewer,
+                // waiting for it to load, and then hitting back. This ensures that we always
+                // display the best image available, with requiring as little network as possible
+                if (_file == null) {
+                  widget.event.isAttachmentCached().then((cached) {
+                    if (cached) {
+                      _requestFile();
+                    }
+                  });
+                }
+              }),
+            ),
+          );
         },
         child: Hero(
           tag: widget.event.eventId,