chen08209
446 lines
13 KiB
Dart
446 lines
13 KiB
Dart
import 'package:fl_clash/common/common.dart';
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import 'package:fl_clash/enum/enum.dart';
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import 'package:fl_clash/manager/app_manager.dart';
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import 'package:fl_clash/models/common.dart';
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import 'package:fl_clash/providers/providers.dart';
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import 'package:fl_clash/ui/icons/icons.dart';
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import 'package:fl_clash/widgets/widgets.dart';
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import 'package:flutter/foundation.dart';
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import 'package:material_ui/material_ui.dart';
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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class HomePage extends ConsumerWidget {
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const HomePage({super.key});
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@override
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Widget build(BuildContext context, WidgetRef ref) {
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final hasViewSize = ref.watch(
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viewSizeProvider.select((size) => !size.isEmpty),
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);
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if (!hasViewSize) {
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return const SizedBox.shrink();
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}
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return HomeBackScopeContainer(
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child: AppSidebarContainer(
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child: _HomeShell(
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child: Consumer(
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builder: (_, ref, _) {
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final navigationItems = ref
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.watch(currentNavigationItemsStateProvider)
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.value;
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final isMobile = ref.watch(isMobileViewProvider);
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return _HomePageView(
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navigationItems: navigationItems,
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pageBuilder: (_, index) {
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final navigationItem = navigationItems[index];
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return _NavigationPage(
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key: ValueKey(navigationItem.label),
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item: navigationItem,
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isMobile: isMobile,
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view: navigationItem.builder(context),
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);
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},
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);
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},
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),
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),
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),
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);
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}
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}
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class _HomeShell extends ConsumerWidget {
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const _HomeShell({required this.child});
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final Widget child;
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void _handleToPage(PageLabel pageLabel, WidgetRef ref) {
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ref.read(currentPageLabelProvider.notifier).toPage(pageLabel);
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}
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@override
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Widget build(BuildContext context, WidgetRef ref) {
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final state = ref.watch(navigationStateProvider);
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final isMobile = state.viewMode == ViewMode.mobile;
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final navigationItems = state.navigationItems;
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final floating = ref.watch(
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appSettingProvider.select((state) => state.floatingNavigationBar),
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);
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return Material(
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color: SurfaceLevel.page.colorOf(context.colorScheme),
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child: Column(
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children: [
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Expanded(
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child: Stack(
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children: [
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Positioned.fill(
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child: FocusTraversalGroup(
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policy: PageTraversalPolicy(),
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child: BottomInsetScope(
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inset: isMobile && floating
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? NavigationDock.insetOf(context)
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: 0,
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child: _BodyPadding(isMobile: isMobile, child: child),
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),
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),
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),
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PositionedDirectional(
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start: 0,
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end: 0,
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bottom: 0,
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child: AnimatedVisibility.bottomNavigation(
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visible: isMobile && floating,
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child: _NavigationPadding(
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child: NavigationDock(
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destinations: [
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for (final item in navigationItems)
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NavigationDockDestination(
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glyph: item.glyph,
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label: item.label.label,
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),
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],
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selectedIndex: state.currentIndex,
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onSelected: (index) {
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_handleToPage(navigationItems[index].label, ref);
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},
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),
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),
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),
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),
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],
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),
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),
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AnimatedVisibility.bottomNavigation(
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visible: isMobile && !floating,
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child: _NavigationPadding(
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child: NavigationBar(
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destinations: [
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for (final (index, item) in navigationItems.indexed)
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NavigationDestination(
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icon: AnimatedGlyph(
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glyph: item.glyph,
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filled: index == state.currentIndex,
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),
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label: item.label.label,
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),
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],
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selectedIndex: state.currentIndex,
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onDestinationSelected: (index) {
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_handleToPage(navigationItems[index].label, ref);
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},
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),
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),
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),
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],
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),
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);
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}
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}
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class _BodyPadding extends StatelessWidget {
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const _BodyPadding({required this.isMobile, required this.child});
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final bool isMobile;
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final Widget child;
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@override
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Widget build(BuildContext context) {
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return MediaQuery.removePadding(
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removeTop: false,
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removeBottom: isMobile,
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removeLeft: isMobile,
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removeRight: isMobile,
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context: context,
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child: child,
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);
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}
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}
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class _NavigationPadding extends StatelessWidget {
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const _NavigationPadding({required this.child});
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final Widget child;
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@override
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Widget build(BuildContext context) {
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return MediaQuery.removePadding(
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removeTop: true,
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removeBottom: false,
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removeLeft: true,
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removeRight: true,
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context: context,
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child: child,
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);
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}
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}
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class _NavigationPage extends StatelessWidget {
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const _NavigationPage({
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super.key,
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required this.item,
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required this.isMobile,
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required this.view,
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});
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final NavigationItem item;
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final bool isMobile;
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final Widget view;
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@override
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Widget build(BuildContext context) {
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final scopedView = PageFocusScope(child: view);
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final keptView = KeepScope(
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key: ValueKey(item.label),
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keep: item.keep,
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child: isMobile
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? scopedView
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: Navigator(
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key: ValueKey('${item.label.name}_navigator'),
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pages: [MaterialPage(child: scopedView)],
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onDidRemovePage: (_) {},
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),
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);
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return Consumer(
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builder: (_, ref, child) {
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final isActive = ref.watch(
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shownPageLabelProvider.select((label) => label == item.label),
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);
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// A kept-alive page off screen still ticks its animations, and
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// each tick asks for a frame.
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return PageActivityScope(
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isActive: isActive,
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child: TickerMode(
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enabled: isActive,
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child: ExcludeFocus(
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excluding: !isActive,
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child: KeyboardInsetHold(child: child!),
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),
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),
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);
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},
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child: keptView,
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);
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}
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}
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class _HomePageView extends ConsumerStatefulWidget {
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final IndexedWidgetBuilder pageBuilder;
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final List<NavigationItem> navigationItems;
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const _HomePageView({
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required this.pageBuilder,
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required this.navigationItems,
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});
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@override
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ConsumerState createState() => _HomePageViewState();
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}
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class _HomePageViewState extends ConsumerState<_HomePageView> {
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late PageController _pageController;
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List<int>? _order;
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int _slide = 0;
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@override
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void initState() {
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super.initState();
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_pageController = PageController(initialPage: _pageIndex);
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ref.listenManual(currentPageLabelProvider, (prev, next) {
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if (prev != next) {
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_toPage(next);
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}
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});
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}
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@override
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void didUpdateWidget(covariant _HomePageView oldWidget) {
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super.didUpdateWidget(oldWidget);
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if (!listEquals(
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_labelsOf(oldWidget.navigationItems),
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_labelsOf(widget.navigationItems),
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)) {
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_order = null;
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_updatePageController();
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}
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}
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static List<PageLabel> _labelsOf(List<NavigationItem> items) => [
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for (final item in items) item.label,
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];
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int get _pageIndex => _indexOf(ref.read(currentPageLabelProvider));
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int _indexOf(PageLabel pageLabel) {
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final shown = shownPageLabelOf(pageLabel, widget.navigationItems);
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return widget.navigationItems.indexWhere((item) => item.label == shown);
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}
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Future<void> _toPage(
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PageLabel pageLabel, [
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bool ignoreAnimateTo = false,
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]) async {
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if (!mounted) {
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return;
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}
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final index = _indexOf(pageLabel);
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if (index == -1) {
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return;
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}
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final tabAnimation = ref.read(appSettingProvider).tabAnimation;
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final isMobile = ref.read(isMobileViewProvider);
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final slide = ++_slide;
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final page = _pageController.hasClients
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? _pageController.page?.round() ?? index
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: index;
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final current = _order?[page] ?? page;
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if (_order != null) {
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setState(() => _order = null);
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_pageController.jumpToPage(current);
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}
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if (!isMobile || ignoreAnimateTo) {
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_pageController.jumpToPage(index);
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return;
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}
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// As TabBarView does, so no page between is built and painted on the way.
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if ((index - current).abs() > 1) {
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final adjacent = index > current ? index - 1 : index + 1;
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setState(() {
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_order = List.generate(widget.navigationItems.length, (item) => item)
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..[adjacent] = current
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..[current] = adjacent;
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});
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_pageController.jumpToPage(adjacent);
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}
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final fade = tabAnimation == TabAnimation.fade;
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await _pageController.animateToPage(
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index,
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duration: fade ? fadeTabDuration : kTabScrollDuration,
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curve: fade ? fadeTabCurve : Curves.easeOut,
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);
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if (mounted && slide == _slide && _order != null) {
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setState(() => _order = null);
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}
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}
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void _updatePageController() {
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final pageLabel = ref.read(currentPageLabelProvider);
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_toPage(pageLabel, true);
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}
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@override
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void dispose() {
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_pageController.dispose();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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final itemCount = ref.watch(
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currentNavigationItemsStateProvider.select((state) => state.value.length),
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);
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final fade = ref.watch(
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appSettingProvider.select(
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(state) => state.tabAnimation == TabAnimation.fade,
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),
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);
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return PageView.builder(
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controller: _pageController,
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physics: const NeverScrollableScrollPhysics(),
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itemCount: itemCount,
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findChildIndexCallback: (key) {
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if (key is! ValueKey<PageLabel>) {
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return null;
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}
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final index = widget.navigationItems.indexWhere(
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(item) => item.label == key.value,
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);
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if (index == -1) {
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return null;
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}
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return _order?.indexOf(index) ?? index;
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},
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itemBuilder: (context, index) {
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final page = widget.pageBuilder(context, _order?[index] ?? index);
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return _FadeTabPage(
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key: page.key,
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controller: _pageController,
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position: index,
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enabled: fade,
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child: page,
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);
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},
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);
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}
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}
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/// Cancels the page view's slide so a tab switch cross-fades in place, and
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/// wraps every page even when off so switching the setting keeps their state.
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class _FadeTabPage extends StatelessWidget {
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const _FadeTabPage({
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super.key,
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required this.controller,
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required this.position,
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required this.enabled,
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required this.child,
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});
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final PageController controller;
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final int position;
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final bool enabled;
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final Widget child;
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double get _delta {
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if (!controller.hasClients || !controller.position.hasContentDimensions) {
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return 0;
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}
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final page = controller.page ?? position.toDouble();
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return (position - page).clamp(-1.0, 1.0);
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}
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@override
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Widget build(BuildContext context) {
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return AnimatedBuilder(
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animation: controller,
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builder: (_, child) {
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final offset = _delta;
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final delta = enabled ? offset : 0.0;
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return FractionalTranslation(
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translation: Offset(-delta, 0),
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child: Opacity(opacity: 1 - delta.abs(), child: child),
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);
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},
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child: child,
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);
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}
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}
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class HomeBackScopeContainer extends ConsumerWidget {
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final Widget child;
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const HomeBackScopeContainer({super.key, required this.child});
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@override
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Widget build(BuildContext context, ref) {
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return CommonPopScope(
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onPop: (context) async {
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final pageLabel = ref.read(shownPageLabelProvider);
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final realContext =
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GlobalObjectKey(pageLabel).currentContext ?? context;
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final canPop = Navigator.canPop(realContext);
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if (canPop) {
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Navigator.of(realContext).pop();
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} else if (system.isTV && pageLabel != PageLabel.dashboard) {
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ref
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.read(currentPageLabelProvider.notifier)
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.toPage(PageLabel.dashboard);
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} else {
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await ref.read(systemActionProvider.notifier).handleClose();
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}
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return false;
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},
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child: child,
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);
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}
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}
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