fixed title overflow for SliverScreen

lib/screens/shared/sliver_screen/screen_sliver.dart

@@ -22,21 +22,25 @@ class SliverScreen extends StatelessWidget {
         bottom: false,
         child: CustomScrollView(
           slivers: <Widget>[
-            SliverAppBar(
+            SliverAppBar.large(
-              pinned: true,
               automaticallyImplyLeading: false,
               expandedHeight: Dimens.sliverAppBarExpandedHeight,
               flexibleSpace: FlexibleSpaceBar(
                 centerTitle: false,
-                titlePadding: const EdgeInsets.all(Dimens.paddingM),
+                titlePadding: const EdgeInsets.symmetric(horizontal: Dimens.paddingM),
                 title: DefaultTextStyle(
-                  style: TextStyle(
+                  style: Theme.of(context)
-                    color: Theme.of(context).colorScheme.onSurface,
+                      .textTheme
-                    fontSize: Dimens.grid24,
+                      .headlineSmall!
-                  ),
+                      .copyWith(color: Theme.of(context).colorScheme.onSurface),
+                  maxLines: 2,
+                  overflow: TextOverflow.ellipsis,
+                  child: _Title(
+                    actionsCount: appBarActions.length + (Navigator.of(context).canPop() ? 1 : 0),
                     child: title,
                   ),
                 ),
+              ),
               actions: [
                 ...appBarActions,
                 if (Navigator.of(context).canPop())
@@ -54,3 +58,39 @@ class SliverScreen extends StatelessWidget {
     );
   }
 }
+
+class _Title extends StatelessWidget {
+  final Widget child;
+  final int actionsCount;
+  final double actionsPadding;
+
+  const _Title({
+    required this.actionsCount,
+    required this.child,
+  }) : actionsPadding = Dimens.grid48 * actionsCount - Dimens.paddingM;
+
+  @override
+  Widget build(BuildContext context) {
+    final settings = context.dependOnInheritedWidgetOfExactType<FlexibleSpaceBarSettings>()!;
+    final titleScale = _titleScale(settings);
+    final maxFromTextToAppbar = settings.maxExtent - settings.minExtent - Dimens.paddingM;
+    final currentFromTextToAppbar = settings.currentExtent - settings.minExtent - Dimens.paddingM;
+    final actionsPaddingScale = (1 - currentFromTextToAppbar / maxFromTextToAppbar).clamp(0.0, 1.0);
+
+    return LayoutBuilder(
+      builder: (context, constraints) => SizedBox(
+        height: settings.minExtent - MediaQuery.paddingOf(context).top,
+        width: constraints.maxWidth - (actionsPadding * actionsPaddingScale) / titleScale,
+        child: Align(
+          alignment: Alignment.centerLeft,
+          child: child,
+        ),
+      ),
+    );
+  }
+
+  double _titleScale(FlexibleSpaceBarSettings s) {
+    final extentScale = ((s.maxExtent - s.currentExtent) / (s.maxExtent - s.minExtent)).clamp(0.0, 1.0);
+    return Tween<double>(begin: 1.5, end: 1.0).transform(extentScale);
+  }
+}