328 lines
9.5 KiB
Dart
328 lines
9.5 KiB
Dart
// Author: fruit.com.cn
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import 'dart:async';
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import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import 'package:provider/provider.dart';
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import '../../core/data/repositories/search_repository.dart';
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import '../../core/formatting/error_text.dart';
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import '../../core/theme/app_colors.dart';
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import '../../core/theme/app_dimens.dart';
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import '../../core/theme/app_theme.dart';
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import '../../core/widgets/app_pull_to_refresh.dart';
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import '../../core/widgets/drama_grid_skeleton.dart';
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import '../../core/widgets/empty_state.dart';
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import '../../l10n/app_localizations.dart';
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import '../player/open_player.dart';
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import 'discover_binding.dart';
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import 'discover_logic.dart';
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import 'widgets/search_result_card.dart';
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const double _clearHit = 20;
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const double _clearIconSize = 16;
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const double _clearEndGap = 10;
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const double _loadingInset = 2;
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class SearchPage extends StatefulWidget {
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const SearchPage({super.key});
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@override
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State<SearchPage> createState() => _SearchPageState();
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}
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class _SearchPageState extends State<SearchPage> {
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late final DiscoverLogic _logic;
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@override
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void initState() {
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super.initState();
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_logic = DiscoverBinding().create(search: context.read<SearchRepository>());
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_logic.addListener(_rebuild);
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}
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void _rebuild() {
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if (mounted) setState(() {});
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}
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@override
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void dispose() {
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_logic
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..removeListener(_rebuild)
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..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 l10n = AppLocalizations.of(context)!;
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return AnnotatedRegion<SystemUiOverlayStyle>(
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value: SystemUiOverlayStyle.light,
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child: Theme(
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data: AppTheme.dark(),
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child: MediaQuery.removeViewInsets(
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context: context,
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removeBottom: true,
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child: Scaffold(
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key: const Key('search-page'),
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backgroundColor: AppColors.appBackground,
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resizeToAvoidBottomInset: false,
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body: SafeArea(
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bottom: false,
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child: Column(
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children: [
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_header(l10n),
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Expanded(
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child: AppPullToRefresh(
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key: const Key('search-refresh'),
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onRefresh: _logic.refreshSearch,
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child: _body(l10n),
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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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Widget _header(AppLocalizations l10n) {
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return Padding(
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padding: const EdgeInsets.fromLTRB(8, 6, 14, 8),
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child: SizedBox(
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height: AppDimens.searchHeight,
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child: Row(
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children: [
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SizedBox.square(
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dimension: AppDimens.buttonMedium,
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child: IconButton(
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key: const Key('search-back'),
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padding: EdgeInsets.zero,
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onPressed: () => Navigator.of(context).maybePop(),
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icon: const Icon(
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Icons.arrow_back_ios_new_rounded,
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color: AppColors.textPrimary,
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size: 22,
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),
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),
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),
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const SizedBox(width: AppDimens.spaceSm),
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Expanded(child: _field(l10n)),
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const SizedBox(width: AppDimens.spaceSm),
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TextButton(
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key: const Key('search-cancel'),
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onPressed: () => Navigator.of(context).maybePop(),
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child: Text(l10n.searchCancel),
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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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Widget _field(AppLocalizations l10n) {
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return Container(
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key: const Key('search-field'),
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height: AppDimens.searchHeight,
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padding: const EdgeInsets.only(left: AppDimens.spaceMd),
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decoration: BoxDecoration(
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color: AppColors.contentSurface,
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borderRadius: BorderRadius.circular(AppDimens.searchRadius),
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),
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child: Row(
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children: [
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const Icon(
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Icons.search_rounded,
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color: AppColors.textSecondary,
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size: 18,
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),
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const SizedBox(width: 2),
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Expanded(
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child: TextField(
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key: const Key('discover-search'),
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controller: _logic.search,
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focusNode: _logic.searchFocus,
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autofocus: true,
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onChanged: (_) => _logic.onSearchChanged(),
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onTapOutside: (_) => _logic.searchFocus.unfocus(),
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textInputAction: TextInputAction.search,
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textAlignVertical: TextAlignVertical.center,
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style: const TextStyle(
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color: AppColors.textPrimary,
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fontSize: 14,
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),
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decoration: InputDecoration(
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isDense: true,
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hintText: l10n.searchDiscover,
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hintStyle: const TextStyle(
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color: AppColors.textSecondary,
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fontSize: 13,
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),
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border: InputBorder.none,
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enabledBorder: InputBorder.none,
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focusedBorder: InputBorder.none,
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contentPadding: EdgeInsets.zero,
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),
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scrollPadding: EdgeInsets.zero,
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),
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),
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_fieldTrailing(),
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],
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),
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);
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}
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/// 有内容时把清除按钮放在输入框内部右侧，并留出一点边距。
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/// 刷新时不拿转圈替换叉号，避免宽度变化把按钮抖开。
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Widget _fieldTrailing() {
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final hasText = _logic.search.text.isNotEmpty;
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if (!hasText && !_logic.searchLoading) {
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return const SizedBox(width: AppDimens.spaceMd);
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}
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return SizedBox(
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width: _clearHit + _clearEndGap,
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child: Align(
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alignment: Alignment.centerRight,
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child: Padding(
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padding: const EdgeInsets.only(right: _clearEndGap),
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child: hasText ? _clearButton() : _loadingMark(),
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),
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),
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);
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}
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Widget _clearButton() {
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return GestureDetector(
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key: const Key('search-clear'),
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behavior: HitTestBehavior.opaque,
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onTap: () {
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_logic.search.clear();
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_logic.onSearchChanged();
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_logic.searchFocus.requestFocus();
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},
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child: const SizedBox.square(
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dimension: _clearHit,
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child: Icon(
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Icons.close_rounded,
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color: AppColors.textSecondary,
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size: _clearIconSize,
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),
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),
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);
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}
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Widget _loadingMark() {
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return const SizedBox.square(
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dimension: _clearHit,
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child: Padding(
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padding: EdgeInsets.all(_loadingInset),
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child: CircularProgressIndicator(
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strokeWidth: 2,
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color: AppColors.textPrimary,
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),
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),
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);
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}
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Widget _body(AppLocalizations l10n) {
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if (!_logic.hasSearchQuery) {
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return _stateScroll(
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EmptyState(
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key: const Key('search-idle'),
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icon: Icons.search_rounded,
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title: l10n.searchDiscover,
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),
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);
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}
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if (_logic.searchResults.isNotEmpty) {
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return _resultsGrid();
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}
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if (_logic.searchLoading) {
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return const DramaGridSkeleton(
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key: Key('search-loading-skeleton'),
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columns: 2,
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horizontalPadding: AppDimens.feedPageHorizontal,
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crossAxisSpacing: AppDimens.searchResultGap,
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mainAxisSpacing: AppDimens.searchResultRowGap,
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itemCount: 6,
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physics: AppPullToRefresh.physics,
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);
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}
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if (_logic.searchError != null) {
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return _stateScroll(
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EmptyState(
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key: const Key('search-error'),
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icon: Icons.cloud_off_rounded,
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title: errorText(l10n, _logic.searchError, l10n.searchFailed),
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actionLabel: l10n.retry,
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onAction: _logic.retrySearch,
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),
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);
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}
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return _stateScroll(
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EmptyState(
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key: const Key('search-empty'),
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icon: Icons.search_off_rounded,
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title: l10n.noSearchResults,
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subtitle: l10n.emptyHint,
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),
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);
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}
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Widget _stateScroll(Widget child) {
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return LayoutBuilder(
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builder: (context, constraints) => ListView(
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physics: AppPullToRefresh.physics,
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children: [
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SizedBox(
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height: constraints.maxHeight,
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child: Center(child: child),
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),
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],
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),
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);
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}
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Widget _resultsGrid() {
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return LayoutBuilder(
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builder: (context, constraints) {
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final width =
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(constraints.maxWidth -
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AppDimens.feedPageHorizontal * 2 -
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AppDimens.searchResultGap) /
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2;
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final itemExtent =
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width / AppDimens.cardCoverAspectRatio +
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AppDimens.searchResultTextExtent;
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return GridView.builder(
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key: const Key('search-results-grid'),
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physics: AppPullToRefresh.physics,
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padding: const EdgeInsets.fromLTRB(
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AppDimens.feedPageHorizontal,
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AppDimens.spaceMd,
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AppDimens.feedPageHorizontal,
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AppDimens.spaceXl,
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),
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gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
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crossAxisCount: 2,
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crossAxisSpacing: AppDimens.searchResultGap,
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mainAxisSpacing: AppDimens.searchResultRowGap,
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mainAxisExtent: itemExtent,
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),
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itemCount: _logic.searchResults.length,
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itemBuilder: (context, index) {
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final drama = _logic.searchResults[index];
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return SearchResultCard(
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drama: drama,
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onTap: () => unawaited(playDramaFromCatalog(context, drama)),
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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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