opt: get theme color

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/common/widgets/custom_toast.dart

@@ -8,6 +8,7 @@ class CustomToast extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final ThemeData theme = Theme.of(context);
     final double toastOpacity = GStorage.setting
         .get(SettingBoxKey.defaultToastOp, defaultValue: 1.0) as double;
     return Container(
@@ -15,17 +16,14 @@ class CustomToast extends StatelessWidget {
           EdgeInsets.only(bottom: MediaQuery.of(context).padding.bottom + 30),
       padding: const EdgeInsets.symmetric(horizontal: 17, vertical: 10),
       decoration: BoxDecoration(
-        color: Theme.of(context)
-            .colorScheme
-            .primaryContainer
-            .withOpacity(toastOpacity),
+        color: theme.colorScheme.primaryContainer.withOpacity(toastOpacity),
         borderRadius: BorderRadius.circular(20),
       ),
       child: Text(
         msg,
         style: TextStyle(
           fontSize: 13,
-          color: Theme.of(context).colorScheme.onPrimaryContainer,
+          color: theme.colorScheme.onPrimaryContainer,
         ),
       ),
     );
@@ -40,26 +38,25 @@ class LoadingWidget extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final ThemeData theme = Theme.of(context);
+    final onSurfaceVariant = theme.colorScheme.onSurfaceVariant;
     return Container(
       padding: const EdgeInsets.symmetric(horizontal: 30, vertical: 20),
       decoration: BoxDecoration(
-        color: Theme.of(context).dialogBackgroundColor,
+        color: theme.dialogBackgroundColor,
         borderRadius: BorderRadius.circular(15),
       ),
       child: Column(mainAxisSize: MainAxisSize.min, children: [
         //loading animation
         CircularProgressIndicator(
           strokeWidth: 3,
-          valueColor: AlwaysStoppedAnimation(
-              Theme.of(context).colorScheme.onSurfaceVariant),
+          valueColor: AlwaysStoppedAnimation(onSurfaceVariant),
         ),
 
         //msg
         Container(
           margin: const EdgeInsets.only(top: 20),
-          child: Text(msg,
-              style: TextStyle(
-                  color: Theme.of(context).colorScheme.onSurfaceVariant)),
+          child: Text(msg, style: TextStyle(color: onSurfaceVariant)),
         ),
       ]),
     );