Initial commit

2026-07-14 11:11:36 +08:00
commit 656499cf94
604 changed files with 119518 additions and 0 deletions
@@ -0,0 +1,90 @@
+import 'dart:ui' show ImageFilter;
+
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+import '../../providers/appearance_provider.dart';
+import '../theme/app_theme.dart';
+import 'window_chrome.dart';
+
+
+class AppSliverHeader extends ConsumerWidget {
+  final String? title;
+  final Widget? titleWidget;
+  final Widget? leading;
+  final bool automaticallyImplyLeading;
+  final List<Widget> actions;
+  final PreferredSizeWidget? bottom;
+  final double? expandedHeight;
+  final double? toolbarHeight;
+
+  const AppSliverHeader({
+    super.key,
+    this.title,
+    this.titleWidget,
+    this.leading,
+    this.automaticallyImplyLeading = true,
+    this.actions = const [],
+    this.bottom,
+    this.expandedHeight,
+    this.toolbarHeight,
+  }) : assert(
+         title != null || titleWidget != null,
+         'AppSliverHeader requires either title or titleWidget',
+       );
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final mode =
+        ref.watch(appearanceProvider).value?.headerMode ?? HeaderMode.frosted;
+    final isFrosted = mode == HeaderMode.frosted;
+    final theme = Theme.of(context);
+    final tokens = context.appTokens;
+    final reserved = WindowChrome.reservedTrailingWidth(tokens);
+    final effectiveActions = <Widget>[
+      ...actions,
+      if (reserved > 0) SizedBox(width: reserved),
+    ];
+
+    return SliverAppBar(
+      pinned: true,
+      elevation: 0,
+      scrolledUnderElevation: 0,
+      toolbarHeight: toolbarHeight ?? kToolbarHeight,
+      leading: leading,
+      automaticallyImplyLeading: automaticallyImplyLeading,
+      title:
+          titleWidget ??
+          (title != null
+              ? Text(
+                  title!,
+                  style: theme.textTheme.titleMedium,
+                  maxLines: 1,
+                  overflow: TextOverflow.ellipsis,
+                )
+              : null),
+      actions: effectiveActions,
+      bottom: bottom,
+      expandedHeight: expandedHeight,
+      backgroundColor: isFrosted
+          ? theme.colorScheme.surface.withValues(alpha: 0.7)
+          : theme.colorScheme.surface,
+      shape: isFrosted
+          ? Border(
+              bottom: BorderSide(
+                color: theme.colorScheme.onSurface.withValues(alpha: 0.08),
+                width: 1,
+              ),
+            )
+          : null,
+      flexibleSpace: isFrosted
+          ? ClipRect(
+              child: BackdropFilter(
+                filter: ImageFilter.blur(sigmaX: 18, sigmaY: 18),
+                child: const SizedBox.expand(),
+              ),
+            )
+          : null,
+    );
+  }
+}