Reimplemented download function

lib/shared/image_viewer.dart

@@ -1,9 +1,20 @@
+import 'dart:io';
+
 import 'package:flutter/material.dart';
 
 import 'package:extended_image/extended_image.dart';
 
 import 'package:thunder/shared/hero.dart';
 
+import 'package:image_gallery_saver/image_gallery_saver.dart';
+
+import 'package:flutter_cache_manager/flutter_cache_manager.dart';
+
+import 'package:path_provider/path_provider.dart';
+import 'package:path/path.dart';
+
+import 'package:permission_handler/permission_handler.dart';
+
 class ImageViewer extends StatefulWidget {
   final String url;
 
@@ -14,51 +25,90 @@ class ImageViewer extends StatefulWidget {
 }
 
 class _ImageViewerState extends State<ImageViewer> {
-  GlobalKey<ExtendedImageSlidePageState> slidePagekey = GlobalKey<ExtendedImageSlidePageState>();
+  GlobalKey<ExtendedImageSlidePageState> slidePagekey =
+      GlobalKey<ExtendedImageSlidePageState>();
+
+  _requestPermission() async {
+    Map<Permission, PermissionStatus> statuses = await [
+      Permission.photos,
+    ].request();
+
+    final info2 = statuses[Permission.photos].toString();
+    print(info2);
+  }
 
   @override
   Widget build(BuildContext context) {
+    final theme = Theme.of(context);
     return Scaffold(
       backgroundColor: Colors.black87,
-      body: Center(
-        child: ExtendedImageSlidePage(
-          key: slidePagekey,
-          slideAxis: SlideAxis.both,
-          slideType: SlideType.onlyImage,
-          child: GestureDetector(
-            child: HeroWidget(
-              tag: widget.url,
+      body: Stack(
+        children: [
+          Positioned(
+            top: 0,
+            left: 0,
+            child: IconButton(
+              color: theme.textTheme.titleLarge?.color,
+              onPressed: () async {
+                File file = await DefaultCacheManager().getSingleFile(widget.url);
+                if ((Platform.isAndroid || Platform.isIOS) &&
+                    await Permission.contacts.request().isGranted) {
+                  final result = await ImageGallerySaver.saveFile(file.path);
+                } else if (Platform.isLinux || Platform.isWindows) {
+                  final filePath =
+                      '${(await getApplicationDocumentsDirectory()).path}/ThunderImages/${basename(file.path)}';
+                  File(filePath)
+                    ..createSync(recursive: true)
+                    ..writeAsBytesSync(file.readAsBytesSync());
+                }
+              },
+              icon: const Icon(
+                Icons.download,
+                semanticLabel: 'Download',
+              ),
+            ),
+          ),
+          Center(
+            child: ExtendedImageSlidePage(
+              key: slidePagekey,
+              slideAxis: SlideAxis.both,
               slideType: SlideType.onlyImage,
-              slidePagekey: slidePagekey,
-              child: ExtendedImage.network(
-                widget.url,
-                enableSlideOutPage: true,
-                mode: ExtendedImageMode.gesture,
-                cache: true,
-                clearMemoryCacheWhenDispose: true,
-                initGestureConfigHandler: (ExtendedImageState state) {
-                  return GestureConfig(
-                    minScale: 0.9,
-                    animationMinScale: 0.7,
-                    maxScale: 4.0,
-                    animationMaxScale: 4.5,
-                    speed: 1.0,
-                    inertialSpeed: 100.0,
-                    initialScale: 1.0,
-                    inPageView: false,
-                    initialAlignment: InitialAlignment.center,
-                    reverseMousePointerScrollDirection: true,
-                    gestureDetailsIsChanged: (GestureDetails? details) {},
-                  );
+              child: GestureDetector(
+                child: HeroWidget(
+                  tag: widget.url,
+                  slideType: SlideType.onlyImage,
+                  slidePagekey: slidePagekey,
+                  child: ExtendedImage.network(
+                    widget.url,
+                    enableSlideOutPage: true,
+                    mode: ExtendedImageMode.gesture,
+                    cache: true,
+                    clearMemoryCacheWhenDispose: true,
+                    initGestureConfigHandler: (ExtendedImageState state) {
+                      return GestureConfig(
+                        minScale: 0.9,
+                        animationMinScale: 0.7,
+                        maxScale: 4.0,
+                        animationMaxScale: 4.5,
+                        speed: 1.0,
+                        inertialSpeed: 100.0,
+                        initialScale: 1.0,
+                        inPageView: false,
+                        initialAlignment: InitialAlignment.center,
+                        reverseMousePointerScrollDirection: true,
+                        gestureDetailsIsChanged: (GestureDetails? details) {},
+                      );
+                    },
+                  ),
+                ),
+                onTap: () {
+                  slidePagekey.currentState!.popPage();
+                  Navigator.pop(context);
                 },
               ),
             ),
-            onTap: () {
-              slidePagekey.currentState!.popPage();
-              Navigator.pop(context);
-            },
-          ),
-        ),
+          )
+        ],
       ),
     );
   }

pubspec.lock

@@ -288,7 +288,7 @@ packages:
     source: hosted
     version: "0.7.0"
   flutter_cache_manager:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: flutter_cache_manager
       sha256: "32cd900555219333326a2d0653aaaf8671264c29befa65bbd9856d204a4c9fb3"
@@ -401,6 +401,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "4.0.17"
+  image_gallery_saver:
+    dependency: "direct main"
+    description:
+      name: image_gallery_saver
+      sha256: "467de169167b5c4e1ddde65395e4653c336a82f760b6700ea295085b7f2dd248"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.2"
   js:
     dependency: transitive
     description:
@@ -463,10 +471,10 @@ packages:
     dependency: transitive
     description:
       name: matcher
-      sha256: "6501fbd55da300384b768785b83e5ce66991266cec21af89ab9ae7f5ce1c4cbb"
+      sha256: "1803e76e6653768d64ed8ff2e1e67bea3ad4b923eb5c56a295c3e634bad5960e"
       url: "https://pub.dev"
     source: hosted
-    version: "0.12.15"
+    version: "0.12.16"
   material_color_utilities:
     dependency: transitive
     description:
@@ -540,7 +548,7 @@ packages:
     source: hosted
     version: "1.8.3"
   path_provider:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: path_provider
       sha256: "3087813781ab814e4157b172f1a11c46be20179fcc9bea043e0fba36bc0acaa2"
@@ -595,6 +603,46 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.11.1"
+  permission_handler:
+    dependency: "direct main"
+    description:
+      name: permission_handler
+      sha256: "1b6b3e73f0bcbc856548bbdfb1c33084a401c4f143e220629a9055233d76c331"
+      url: "https://pub.dev"
+    source: hosted
+    version: "10.3.0"
+  permission_handler_android:
+    dependency: transitive
+    description:
+      name: permission_handler_android
+      sha256: "8f6a95ccbca13766882f95d32684d7c9bfe6c45650c32bedba948ef1c6a4ddf7"
+      url: "https://pub.dev"
+    source: hosted
+    version: "10.2.3"
+  permission_handler_apple:
+    dependency: transitive
+    description:
+      name: permission_handler_apple
+      sha256: "08dcb6ce628ac0b257e429944b4c652c2a4e6af725bdf12b498daa2c6b2b1edb"
+      url: "https://pub.dev"
+    source: hosted
+    version: "9.1.0"
+  permission_handler_platform_interface:
+    dependency: transitive
+    description:
+      name: permission_handler_platform_interface
+      sha256: de20a5c3269229c1ae2e5a6b822f6cb59578b23e8255c93fbeebfc82116e6b11
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.10.0"
+  permission_handler_windows:
+    dependency: transitive
+    description:
+      name: permission_handler_windows
+      sha256: f67cab14b4328574938ecea2db3475dad7af7ead6afab6338772c5f88963e38b
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.1.2"
   petitparser:
     dependency: transitive
     description:
@@ -852,10 +900,10 @@ packages:
     dependency: transitive
     description:
       name: test_api
-      sha256: daadc9baabec998b062c9091525aa95786508b1c48e9c30f1f891b8bf6ff2e64
+      sha256: "75760ffd7786fffdfb9597c35c5b27eaeec82be8edfb6d71d32651128ed7aab8"
       url: "https://pub.dev"
     source: hosted
-    version: "0.5.2"
+    version: "0.6.0"
   translator:
     dependency: transitive
     description:

pubspec.yaml

@@ -66,6 +66,10 @@ dependencies:
   share_plus: ^7.0.2
   flex_color_scheme: ^7.1.2
   dynamic_color: ^1.6.5
+  image_gallery_saver: ^2.0.2
+  flutter_cache_manager: ^3.3.0
+  permission_handler: ^10.3.0
+  path_provider: ^2.0.15
 
 dev_dependencies:
   flutter_test:

windows/flutter/generated_plugin_registrant.cc

@@ -7,13 +7,16 @@
 #include "generated_plugin_registrant.h"
 
 #include <dynamic_color/dynamic_color_plugin_c_api.h>
+#include <permission_handler_windows/permission_handler_windows_plugin.h>
 #include <sentry_flutter/sentry_flutter_plugin.h>
 #include <share_plus/share_plus_windows_plugin_c_api.h>
 #include <url_launcher_windows/url_launcher_windows.h>
 
 void RegisterPlugins(flutter::PluginRegistry* registry) {
   DynamicColorPluginCApiRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("DynamicColorPluginCApi"));
+  PermissionHandlerWindowsPluginRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("PermissionHandlerWindowsPlugin"));
   SentryFlutterPluginRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("SentryFlutterPlugin"));
   SharePlusWindowsPluginCApiRegisterWithRegistrar(

windows/flutter/generated_plugins.cmake

@@ -4,6 +4,7 @@
 
 list(APPEND FLUTTER_PLUGIN_LIST
   dynamic_color
+  permission_handler_windows
   sentry_flutter
   share_plus
   url_launcher_windows

windows/runner/flutter_window.cpp

@@ -31,6 +31,11 @@ bool FlutterWindow::OnCreate() {
     this->Show();
   });
 
+  // Flutter can complete the first frame before the "show window" callback is
+  // registered. The following call ensures a frame is pending to ensure the
+  // window is shown. It is a no-op if the first frame hasn't completed yet.
+  flutter_controller_->ForceRedraw();
+
   return true;
 }