1724 lines
64 KiB
Dart
1724 lines
64 KiB
Dart
import 'dart:async';
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import 'package:flutter/material.dart';
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import 'package:material_symbols_icons/symbols.dart';
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import 'package:provider/provider.dart';
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import 'package:cached_network_image_ce/cached_network_image.dart';
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import '../../../media/library_first_character.dart';
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import '../../../media/library_query.dart';
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import '../../../media/media_backend.dart';
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import '../../../media/media_item.dart';
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import '../../../providers/multi_server_provider.dart';
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import '../../../utils/media_server_http_client.dart';
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import '../../../exceptions/media_server_exceptions.dart';
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import '../../../focus/dpad_navigator.dart';
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import '../../../focus/input_mode_tracker.dart';
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import '../../../media/media_filter.dart';
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import '../../../media/media_sort.dart';
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import '../../../widgets/settings_builder.dart';
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import '../../../services/image_cache_service.dart';
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import '../../../services/library_query_translator.dart';
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import '../../../services/plex_constants.dart';
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import '../../../utils/error_message_utils.dart';
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import '../../../utils/app_logger.dart';
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import '../../../utils/grid_size_calculator.dart';
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import '../../../utils/layout_constants.dart';
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import '../../../utils/media_image_helper.dart';
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import '../../../utils/provider_extensions.dart';
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import '../alpha_jump_bar.dart';
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import '../alpha_jump_helper.dart';
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import '../alpha_scroll_handle.dart';
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import '../library_alpha_bar_strategy.dart';
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import '../library_alpha_scroll_metrics.dart';
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import '../library_filter_sort_loader.dart';
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import '../../../widgets/focusable_media_card.dart';
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import '../../../widgets/focusable_filter_chip.dart';
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import '../../../widgets/loading_indicator_box.dart';
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import '../../../widgets/media_grid_delegate.dart';
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import '../../../widgets/media_card_list_layout.dart';
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import '../../../widgets/overlay_sheet.dart';
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import '../../../mixins/library_tab_focus_mixin.dart';
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import '../folder_tree_view.dart';
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import '../filters_bottom_sheet.dart';
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import '../sort_bottom_sheet.dart';
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import '../../../widgets/app_icon.dart';
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import '../../../widgets/focusable_list_tile.dart';
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import '../content_state_builder.dart';
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import '../../../services/storage_service.dart';
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import '../../../services/settings_service.dart';
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import '../../../mixins/grid_focus_node_mixin.dart';
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import '../../../mixins/item_updatable.dart';
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import '../../../mixins/watch_state_aware.dart';
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import '../../../mixins/deletion_aware.dart';
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import '../../../mixins/paginated_item_loader.dart';
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import '../../../widgets/skeleton_media_card.dart';
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import '../../../utils/deletion_notifier.dart';
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import '../../../utils/global_key_utils.dart';
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import '../../../utils/watch_state_notifier.dart';
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import '../../../utils/platform_detector.dart';
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import '../../../i18n/strings.g.dart';
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import '../../main_screen.dart';
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import 'base_library_tab.dart';
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/// Browse tab for library screen
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/// Shows library items with grouping, filtering, and sorting
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class LibraryBrowseTab extends BaseLibraryTab<MediaItem> {
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/// Invoked whenever the tab resets its inner scroll position to the top
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/// (filter/sort change, library reload, etc.). Lets the parent resync the
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/// outer floating header — see `_resetOuterScroll` in libraries_screen.
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final VoidCallback? onResetScroll;
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const LibraryBrowseTab({
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super.key,
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required super.library,
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super.viewMode,
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super.density,
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super.onDataLoaded,
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super.isActive,
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super.suppressAutoFocus,
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super.onBack,
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this.onResetScroll,
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});
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@override
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State<LibraryBrowseTab> createState() => _LibraryBrowseTabState();
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}
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class _LibraryBrowseTabState extends BaseLibraryTabState<MediaItem, LibraryBrowseTab>
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with
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ItemUpdatable,
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LibraryTabFocusMixin,
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GridFocusNodeMixin,
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WatchStateAware,
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DeletionAware,
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PaginatedItemLoader<LibraryBrowseTab> {
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@override
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String? get itemServerId => widget.library.serverId;
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String _toGlobalKey(String ratingKey, {String? serverId}) =>
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buildGlobalKey(serverId ?? widget.library.serverId ?? '', ratingKey);
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@override
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String? get deletionServerId => widget.library.serverId;
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@override
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String? get watchStateServerId => widget.library.serverId;
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@override
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Set<String>? get watchedIds => loadedItems.values.map((e) => e.id).toSet();
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@override
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Set<String>? get watchedGlobalKeys {
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if (loadedItems.isEmpty) return <String>{};
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final keys = <String>{};
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for (final item in loadedItems.values) {
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final serverId = item.serverId ?? widget.library.serverId;
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if (serverId == null) return null;
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keys.add(_toGlobalKey(item.id, serverId: serverId));
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}
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return keys;
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}
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@override
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Set<String>? get deletionIds => loadedItems.values.map((e) => e.id).toSet();
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@override
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Set<String>? get deletionGlobalKeys {
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if (loadedItems.isEmpty) return <String>{};
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final keys = <String>{};
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for (final item in loadedItems.values) {
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final serverId = item.serverId ?? widget.library.serverId;
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if (serverId == null) return null;
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keys.add(_toGlobalKey(item.id, serverId: serverId));
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}
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return keys;
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}
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@override
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void onWatchStateChanged(WatchStateEvent event) {
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if (event.changeType == WatchStateChangeType.progressUpdate ||
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event.changeType == WatchStateChangeType.removedFromContinueWatching) {
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return;
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}
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final affectedIds = {event.itemId, ...event.parentChain};
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for (final item in loadedItems.values) {
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if (affectedIds.contains(item.id)) {
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unawaited(updateItem(item.id));
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}
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}
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}
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@override
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void onDeletionEvent(DeletionEvent event) {
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// If we have an item that matches the rating key exactly, remove it and rebuild indices
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final matchEntry = loadedItems.entries.where((e) => e.value.id == event.itemId).firstOrNull;
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if (matchEntry != null) {
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setState(() {
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removeLoadedItemAndShift(matchEntry.key);
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});
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return;
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}
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// If a child item was deleted, update our item to reflect that.
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// If all children were deleted, remove our item.
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// Otherwise, just update the counts.
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for (final parentKey in event.parentChain) {
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final parentEntry = loadedItems.entries.where((e) => e.value.id == parentKey).firstOrNull;
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if (parentEntry != null) {
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final item = parentEntry.value;
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final newLeafCount = (item.leafCount ?? 1) - event.leafCount;
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if (newLeafCount <= 0) {
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setState(() {
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removeLoadedItemAndShift(parentEntry.key);
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});
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} else {
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setState(() {
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loadedItems[parentEntry.key] = item.copyWith(leafCount: newLeafCount);
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});
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}
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return;
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}
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}
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// If neither the item nor its parents are loaded (evicted), the event
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// was already filtered by DeletionAware's upstream check against
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// deletionGlobalKeys/deletionIds, so this point is unreachable.
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// The grid self-corrects when the next page fetch updates totalSize from
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// the server response on the next scroll.
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}
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@override
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String get focusNodeDebugLabel => 'browse_first_item';
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@override
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int get itemCount => totalSize;
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@override
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void updateItemInLists(String itemId, MediaItem updatedMetadata) {
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for (final entry in loadedItems.entries) {
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if (entry.value.id == itemId) {
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loadedItems[entry.key] = updatedMetadata;
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break;
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}
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}
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}
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// Browse-specific state (not in base class)
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List<MediaFilter> _filters = [];
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List<MediaSort> _sortOptions = [];
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Map<String, String> _selectedFilters = {};
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MediaSort? _selectedSort;
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bool _isSortDescending = false;
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String _selectedGrouping = 'all'; // all, seasons, episodes, folders
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// Alpha jump bar state
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List<LibraryFirstCharacter> _firstCharacters = [];
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AlphaJumpHelper _alphaHelper = AlphaJumpHelper(const []);
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late final LibraryAlphaBarStrategy _alphaStrategy = LibraryAlphaBarStrategy.forBackend(
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widget.library.backend,
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// Resolved on demand and only invoked by [PlexAlphaBarStrategy], which is
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// only constructed when the library's backend is Plex — the bang is safe.
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plexClientProvider: () {
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final manager = context.read<MultiServerProvider>().serverManager;
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return manager.getPlexClient(widget.library.serverId ?? '')!;
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},
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libraryKey: widget.library.id,
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isShared: widget.library.isShared,
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);
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/// On Jellyfin libraries the alpha bar acts as a filter (matches the
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/// JF web client's UX). Holds the active letter (`#`, `A`–`Z`) or null
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/// when no filter is applied.
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String? _jellyfinAlphaPrefix;
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/// Pre-fetched filter values for Jellyfin libraries — populated by
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/// `_loadContent` and consumed by the FiltersBottomSheet so the sheet
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/// doesn't need to call back into a Plex client for value listings.
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Map<String, List<MediaFilterValue>> _jellyfinFilterValues = const {};
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final ValueNotifier<int> _currentFirstVisibleIndex = ValueNotifier<int>(0);
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LibraryAlphaScrollMetrics _scrollMetrics = LibraryAlphaScrollMetrics.empty;
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double _effectiveTopPadding = _gridTopPadding;
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final GlobalKey _firstListItemKey = GlobalKey(debugLabel: 'first_library_list_item');
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double? _measuredListRowHeight;
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int? _listMetricsDensity;
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bool? _listMetricsUsesWideRatio;
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final FocusNode _alphaJumpBarFocusNode = FocusNode(debugLabel: 'alpha_jump_bar');
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// When the user taps a letter, pin the highlight so scroll-based recalculation
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// doesn't immediately override it (e.g. when the letter has fewer items than a full row).
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bool _hasJumpPin = false;
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// True while a jump-triggered animateTo is in progress — suppresses all
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// scroll-based letter recalculation to prevent flashing.
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bool _isJumpScrolling = false;
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// Incremented on each jump so that overlapping animations don't clobber each other.
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int _jumpScrollGeneration = 0;
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// Scroll activity tracking (for phone scroll handle and range-load gating)
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final ValueNotifier<bool> _isScrollActive = ValueNotifier<bool>(false);
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Timer? _scrollActivityTimer;
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// Alpha bar update: throttle (leading edge) + trailing timer (ensures final position)
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DateTime? _lastAlphaUpdate;
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Timer? _alphaUpdateTimer;
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/// Generation counter for the filter/sort loading phase of [_loadContent].
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/// Separate from the mixin's pagination generation so a filter reload can
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/// invalidate in-flight filter/sort fetches without touching item pagination.
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int _contentRequestId = 0;
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int _firstCharactersRequestId = 0;
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static const int _fetchSize = 200;
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static const int _jellyfinFetchSize = 72;
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Timer? _scrollIdleTimer;
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bool _rangeLoadScheduled = false;
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bool _topScrollResetScheduled = false;
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bool get _isJellyfinLibrary => widget.library.backend == MediaBackend.jellyfin;
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int get _activeFetchSize => _isJellyfinLibrary ? _jellyfinFetchSize : _fetchSize;
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// Focus nodes for filter chips
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final FocusNode _groupingChipFocusNode = FocusNode(debugLabel: 'grouping_chip');
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final FocusNode _filtersChipFocusNode = FocusNode(debugLabel: 'filters_chip');
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final FocusNode _sortChipFocusNode = FocusNode(debugLabel: 'sort_chip');
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// The inner CustomScrollView attaches its position to NestedScrollView's
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// shared inner controller (via PrimaryScrollController), which has one
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// position per kept-alive tab — making `controller.position` ambiguous and
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// throw an assertion. We capture this tab's specific [ScrollPosition] from
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// a Builder placed inside the slivers list, and address it directly for
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// reads, listener attachment, and programmatic jumpTo/animateTo.
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ScrollPosition? _innerPosition;
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// Lets us trigger pull-to-refresh on the folder tree, which now lives as a
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// sliver inside the same CustomScrollView (no longer self-owning RefreshIndicator).
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final GlobalKey<FolderTreeViewState> _folderTreeKey = GlobalKey<FolderTreeViewState>();
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void _bindInnerPosition(ScrollPosition? position) {
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if (position == _innerPosition) return;
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_innerPosition?.removeListener(_onScrollChanged);
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_innerPosition = position;
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_innerPosition?.addListener(_onScrollChanged);
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}
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@override
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void dispose() {
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disposePagination();
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_scrollActivityTimer?.cancel();
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_scrollIdleTimer?.cancel();
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_alphaUpdateTimer?.cancel();
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_innerPosition?.removeListener(_onScrollChanged);
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// _innerPosition is owned by the inner CustomScrollView's Scrollable.
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_groupingChipFocusNode.dispose();
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_filtersChipFocusNode.dispose();
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_sortChipFocusNode.dispose();
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_alphaJumpBarFocusNode.dispose();
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_currentFirstVisibleIndex.dispose();
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_isScrollActive.dispose();
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disposeGridFocusNodes();
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super.dispose();
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}
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// Override tryFocus to use loadedItems instead of base class items list
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@override
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void tryFocus() {
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if (widget.suppressAutoFocus) return;
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// On mobile (touch mode), skip auto-focus to prevent ensureVisible()
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// from interfering with TabBarView page animations
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if (!InputModeTracker.isKeyboardMode(context)) return;
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if (widget.isActive && hasLoadedData && !hasFocused && loadedItems.isNotEmpty) {
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hasFocused = true;
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WidgetsBinding.instance.addPostFrameCallback((_) {
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if (mounted) focusFirstItem();
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});
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}
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}
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// Override loadData to use our custom _loadContent
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@override
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Future<List<MediaItem>> loadData() async {
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// This is called by base class loadItems(), but we override loadItems() entirely
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// So this just returns empty - actual loading is done in _loadContent
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return [];
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}
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// Override loadItems to use our custom loading with pagination
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@override
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Future<void> loadItems() async {
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await _loadContent();
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}
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// Required abstract implementations from base class
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@override
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IconData get emptyIcon => Symbols.folder_open_rounded;
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@override
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String get emptyMessage => t.libraries.thisLibraryIsEmpty;
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@override
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String get errorContext => t.libraries.content;
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// Override buildContent - not used since we override build()
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@override
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Widget buildContent(List<MediaItem> items) => const SizedBox.shrink();
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/// Focus the first item in the grid/list/folder tree (for tab activation)
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@override
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void focusFirstItem() {
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// In folder mode, items list is empty — focus the first folder tree item directly
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if (_selectedGrouping == 'folders') {
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void request() {
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if (mounted && !firstItemFocusNode.hasFocus) {
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firstItemFocusNode.requestFocus();
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}
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}
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request();
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WidgetsBinding.instance.addPostFrameCallback((_) => request());
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return;
|
||
}
|
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|
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if (loadedItems.isNotEmpty) {
|
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// Request immediately, then once more on the next frame to handle cases
|
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// where the grid/list attaches after the initial focus attempt.
|
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void request() {
|
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if (mounted && loadedItems.isNotEmpty && !firstItemFocusNode.hasFocus) {
|
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firstItemFocusNode.requestFocus();
|
||
}
|
||
}
|
||
|
||
request();
|
||
WidgetsBinding.instance.addPostFrameCallback((_) => request());
|
||
}
|
||
}
|
||
|
||
/// Height of the chips bar (padding + chip + padding)
|
||
static const double _chipsBarHeight = 32.0;
|
||
|
||
/// Focus the chips bar (for navigating from tab bar to content).
|
||
/// Called by libraries screen when pressing DOWN on tab bar.
|
||
void focusChipsBar() {
|
||
lastFocusedGridIndex = null;
|
||
_groupingChipFocusNode.requestFocus();
|
||
}
|
||
|
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/// Reset transient browse state before loading a different library.
|
||
void _resetForFullReload() {
|
||
_scrollActivityTimer?.cancel();
|
||
_scrollIdleTimer?.cancel();
|
||
_isScrollActive.value = false;
|
||
_hasJumpPin = false;
|
||
_isJumpScrolling = false;
|
||
_jumpScrollGeneration++;
|
||
_currentFirstVisibleIndex.value = 0;
|
||
_measuredListRowHeight = null;
|
||
|
||
// The browse tab state is kept alive across libraries, so ensure this
|
||
// tab's scroll resets to 0 (other tabs keep their own positions). Defer
|
||
// the jump because library changes call this from didUpdateWidget; jumping
|
||
// there dispatches scroll notifications while the AppBar is building.
|
||
_scheduleTopScrollReset();
|
||
}
|
||
|
||
void _scheduleTopScrollReset() {
|
||
if (_topScrollResetScheduled) return;
|
||
_topScrollResetScheduled = true;
|
||
WidgetsBinding.instance.addPostFrameCallback((_) {
|
||
_topScrollResetScheduled = false;
|
||
if (!mounted) return;
|
||
|
||
final pos = _innerPosition;
|
||
if (pos != null && pos.hasPixels && pos.pixels != 0) {
|
||
pos.jumpTo(0);
|
||
}
|
||
|
||
// Inner-only resets bypass NestedScrollView's natural delta surrender,
|
||
// leaving the outer floating header in its prior partially-hidden state.
|
||
widget.onResetScroll?.call();
|
||
});
|
||
}
|
||
|
||
Future<void> _loadContent() async {
|
||
final generation = ++_contentRequestId;
|
||
final firstCharactersGeneration = ++_firstCharactersRequestId;
|
||
|
||
_resetForFullReload();
|
||
|
||
_resetTopOfPageState();
|
||
_currentFirstVisibleIndex.value = 0;
|
||
|
||
// Plex returns categories from `/library/sections/{id}/filters` +
|
||
// `/sorts`; Jellyfin maps `/Items/Filters` into the same shape with
|
||
// values pre-cached and a hardcoded client-side sort list. Both flow
|
||
// through the unified [MediaServerClient.fetchLibraryFiltersWithValues].
|
||
final client = context.getMediaClientForLibrary(widget.library);
|
||
final loader = LibraryFilterSortLoader(clientFor: (_) => client);
|
||
|
||
try {
|
||
final storage = await StorageService.getInstance();
|
||
final savedFilters = storage.getLibraryFilters(sectionId: widget.library.globalKey);
|
||
final savedSort = storage.getLibrarySort(widget.library.globalKey);
|
||
final savedGrouping = storage.getLibraryGrouping(widget.library.globalKey);
|
||
|
||
final LoadedFiltersAndSorts loaded;
|
||
if (_isJellyfinLibrary) {
|
||
// `/Items/Filters` can be much slower than the paged `/Items` browse
|
||
// request on large Jellyfin libraries. Load only the local sort list
|
||
// before page 1, then fill filter values in the background.
|
||
final sorts = await client.fetchSortOptions(widget.library.id, libraryType: widget.library.kind.id);
|
||
loaded = LoadedFiltersAndSorts(filters: const [], sorts: sorts);
|
||
} else {
|
||
// Plex filters+sorts must resolve before items so saved-sort restoration
|
||
// can match a saved key against the just-loaded sort list, and so the
|
||
// first item fetch already includes the restored sort param.
|
||
loaded = await loader.load(widget.library);
|
||
}
|
||
|
||
if (generation != _contentRequestId || !mounted) return;
|
||
setState(() {
|
||
_filters = loaded.filters;
|
||
_sortOptions = loaded.sorts;
|
||
// Plex returns no cached values (filters fetched lazily per-category);
|
||
// assigning the empty map is a no-op for Plex and a real payload for Jellyfin.
|
||
_jellyfinFilterValues = loaded.cachedValues;
|
||
_selectedFilters = Map.from(savedFilters);
|
||
_selectedGrouping = savedGrouping ?? _getDefaultGrouping();
|
||
|
||
// Restore sort
|
||
if (savedSort != null) {
|
||
final sortKey = savedSort['key'] as String?;
|
||
if (sortKey != null) {
|
||
final sort = loaded.sorts.where((s) => s.key == sortKey).firstOrNull;
|
||
if (sort != null) {
|
||
_selectedSort = sort;
|
||
_isSortDescending = (savedSort['descending'] as bool?) ?? false;
|
||
}
|
||
}
|
||
}
|
||
});
|
||
|
||
if (_isJellyfinLibrary) {
|
||
_loadJellyfinFiltersInBackground(generation);
|
||
}
|
||
|
||
// Load items and first characters in parallel
|
||
// _loadItems manages its own requestId internally
|
||
await Future.wait([_loadItems(), _loadFirstCharacters(requestId: firstCharactersGeneration)]);
|
||
} catch (e) {
|
||
if (!mounted) return;
|
||
setState(() {
|
||
errorMessage = _getErrorMessage(e);
|
||
isLoading = false;
|
||
});
|
||
}
|
||
}
|
||
|
||
void _loadJellyfinFiltersInBackground(int generation) {
|
||
final client = context.getMediaClientForLibrary(widget.library);
|
||
unawaited(
|
||
client
|
||
.fetchLibraryFiltersWithValues(widget.library.id)
|
||
.then((result) {
|
||
if (generation != _contentRequestId || !mounted) return;
|
||
setState(() {
|
||
_filters = result.filters;
|
||
_jellyfinFilterValues = result.cachedValues;
|
||
});
|
||
})
|
||
.catchError((Object e, StackTrace st) {
|
||
appLogger.w('Jellyfin library filters failed; browse content remains available', error: e, stackTrace: st);
|
||
}),
|
||
);
|
||
}
|
||
|
||
/// Initial UI state both Plex and Jellyfin paths need before fetching:
|
||
/// loading flag set, lists cleared, filter/sort caches reset.
|
||
void _resetTopOfPageState() {
|
||
setState(() {
|
||
isLoading = true;
|
||
errorMessage = null;
|
||
items = [];
|
||
resetPaginationState();
|
||
_filters = [];
|
||
_sortOptions = [];
|
||
_jellyfinFilterValues = const {};
|
||
_jellyfinAlphaPrefix = null;
|
||
_selectedFilters = {};
|
||
_selectedSort = null;
|
||
_isSortDescending = false;
|
||
_selectedGrouping = _getDefaultGrouping();
|
||
_firstCharacters = [];
|
||
_alphaHelper = AlphaJumpHelper(const []);
|
||
_scrollMetrics = LibraryAlphaScrollMetrics.empty;
|
||
_measuredListRowHeight = null;
|
||
});
|
||
}
|
||
|
||
/// Build the filter params map for API calls
|
||
Map<String, String> _buildFilterParams() {
|
||
final filterParams = Map<String, String>.from(_selectedFilters);
|
||
|
||
// Add grouping type filter (but not for 'all' or 'folders')
|
||
if (_selectedGrouping != 'all' && _selectedGrouping != 'folders') {
|
||
final typeId = _getGroupingTypeId();
|
||
if (typeId.isNotEmpty) {
|
||
filterParams['type'] = typeId;
|
||
}
|
||
} else if (_selectedGrouping == 'all' && widget.library.isShared) {
|
||
// Shared libraries: filter to video content only (exclude library section entries)
|
||
filterParams['type'] = PlexMetadataType.videoCsv;
|
||
}
|
||
|
||
// Add sort
|
||
if (_selectedSort != null) {
|
||
filterParams['sort'] = _selectedSort!.getSortKey(descending: _isSortDescending);
|
||
}
|
||
|
||
filterParams['includeCollections'] = '1';
|
||
|
||
// Jellyfin alpha-bar filter — picked up by DataAggregationService and
|
||
// converted to NameStartsWith / NameLessThan on the wire.
|
||
if (_jellyfinAlphaPrefix != null) {
|
||
filterParams['alphaPrefix'] = _jellyfinAlphaPrefix!;
|
||
}
|
||
|
||
return filterParams;
|
||
}
|
||
|
||
Future<void> _loadItems() async {
|
||
final generation = _contentRequestId;
|
||
setState(() {
|
||
isLoading = true;
|
||
items = [];
|
||
resetPaginationState();
|
||
// Increment content version when loading fresh content
|
||
// This invalidates the last focused index
|
||
gridContentVersion++;
|
||
cleanupGridFocusNodes(0);
|
||
});
|
||
|
||
try {
|
||
await loadInitialPage(_calculateInitialFetchSize());
|
||
|
||
if (generation != _contentRequestId || !mounted) return;
|
||
setState(() {
|
||
isLoading = false;
|
||
});
|
||
|
||
hasLoadedData = true;
|
||
tryFocus();
|
||
|
||
// Notify parent
|
||
if (widget.onDataLoaded != null) {
|
||
WidgetsBinding.instance.addPostFrameCallback((_) {
|
||
widget.onDataLoaded!();
|
||
});
|
||
}
|
||
} catch (e) {
|
||
if (generation != _contentRequestId || !mounted) return;
|
||
setState(() {
|
||
errorMessage = _getErrorMessage(e);
|
||
isLoading = false;
|
||
});
|
||
}
|
||
}
|
||
|
||
@override
|
||
Future<LibraryPage<MediaItem>> fetchPage(int start, int size, AbortController? abort) async {
|
||
final client = context.getMediaClientForLibrary(widget.library);
|
||
final filterParams = _buildFilterParams();
|
||
final query = libraryQueryFromPlexMap(
|
||
map: filterParams,
|
||
libraryKind: filterParams.containsKey('type') ? null : widget.library.kind,
|
||
offset: start,
|
||
limit: size,
|
||
);
|
||
return client.fetchLibraryPagedContent(
|
||
widget.library.id,
|
||
query: query,
|
||
libraryKind: widget.library.kind,
|
||
abort: abort,
|
||
);
|
||
}
|
||
|
||
@override
|
||
void onPageLoaded(int start, List<MediaItem> pageItems) {
|
||
_prefetchImages(start, pageItems);
|
||
}
|
||
|
||
String _getDefaultGrouping() {
|
||
final type = widget.library.kind.id.toLowerCase();
|
||
if (type == 'show') return 'shows';
|
||
if (type == 'movie') return 'movies';
|
||
return 'all';
|
||
}
|
||
|
||
String _getGroupingTypeId() {
|
||
switch (_selectedGrouping) {
|
||
case 'movies':
|
||
return '1';
|
||
case 'shows':
|
||
return '2';
|
||
case 'seasons':
|
||
return '3';
|
||
case 'episodes':
|
||
return '4';
|
||
default:
|
||
return '';
|
||
}
|
||
}
|
||
|
||
List<String> _getGroupingOptions() {
|
||
final type = widget.library.kind.id.toLowerCase();
|
||
// Folder browsing relies on a section folder API
|
||
// (Plex `/library/sections/{id}/folders`); gated by capability so any
|
||
// future backend that exposes the same can opt in without touching
|
||
// this method.
|
||
final canFolder = context.tryGetMediaClientForServer(widget.library.serverId)?.capabilities.folderGrouping ?? false;
|
||
if (type == 'show') {
|
||
return ['shows', 'seasons', 'episodes', if (canFolder) 'folders'];
|
||
} else if (type == 'movie') {
|
||
return ['movies', if (canFolder) 'folders'];
|
||
} else if (type == 'mixed') {
|
||
// Shared libraries: all video content types, no folders
|
||
return ['all', 'movies', 'shows', 'seasons', 'episodes'];
|
||
}
|
||
return ['all', if (canFolder) 'folders'];
|
||
}
|
||
|
||
String _getGroupingLabel(String grouping) {
|
||
switch (grouping) {
|
||
case 'movies':
|
||
return t.libraries.groupings.movies;
|
||
case 'shows':
|
||
return t.libraries.groupings.shows;
|
||
case 'seasons':
|
||
return t.libraries.groupings.seasons;
|
||
case 'episodes':
|
||
return t.libraries.groupings.episodes;
|
||
case 'folders':
|
||
return t.libraries.groupings.folders;
|
||
default:
|
||
return t.libraries.groupings.all;
|
||
}
|
||
}
|
||
|
||
String _getErrorMessage(dynamic error) {
|
||
if (error is MediaServerHttpException) {
|
||
return mapHttpErrorToMessage(error, context: t.libraries.content);
|
||
}
|
||
return mapUnexpectedErrorToMessage(error, context: t.libraries.content);
|
||
}
|
||
|
||
void _showGroupingBottomSheet() {
|
||
SelectKeyUpSuppressor.suppressSelectUntilKeyUp();
|
||
final options = _getGroupingOptions();
|
||
final controller = OverlaySheetController.of(context);
|
||
controller
|
||
.show<String>(
|
||
showDragHandle: true,
|
||
builder: (sheetContext) => Column(
|
||
mainAxisSize: MainAxisSize.min,
|
||
children: [
|
||
Padding(
|
||
padding: const EdgeInsets.fromLTRB(16, 4, 16, 8),
|
||
child: Text(
|
||
t.libraries.groupings.title,
|
||
style: Theme.of(sheetContext).textTheme.titleMedium,
|
||
maxLines: 1,
|
||
overflow: TextOverflow.ellipsis,
|
||
),
|
||
),
|
||
Flexible(
|
||
child: SingleChildScrollView(
|
||
child: Column(
|
||
mainAxisSize: MainAxisSize.min,
|
||
children: options.map((grouping) {
|
||
final isSelected = _selectedGrouping == grouping;
|
||
return FocusableListTile(
|
||
key: ValueKey(grouping),
|
||
dense: true,
|
||
leading: AppIcon(
|
||
isSelected ? Symbols.radio_button_checked_rounded : Symbols.radio_button_unchecked_rounded,
|
||
fill: 1,
|
||
),
|
||
title: Text(_getGroupingLabel(grouping)),
|
||
onTap: () => controller.close(grouping),
|
||
);
|
||
}).toList(),
|
||
),
|
||
),
|
||
),
|
||
],
|
||
),
|
||
)
|
||
.then((value) {
|
||
if (!mounted || value == null || value == _selectedGrouping) return;
|
||
setState(() {
|
||
_selectedGrouping = value;
|
||
});
|
||
StorageService.getInstance().then((storage) {
|
||
storage.saveLibraryGrouping(widget.library.globalKey, value);
|
||
});
|
||
_loadItems();
|
||
_loadFirstCharacters();
|
||
});
|
||
}
|
||
|
||
void _showFiltersBottomSheet() {
|
||
SelectKeyUpSuppressor.suppressSelectUntilKeyUp();
|
||
OverlaySheetController.of(context).show(
|
||
builder: (context) => FiltersBottomSheet(
|
||
filters: _filters,
|
||
selectedFilters: _selectedFilters,
|
||
serverId: widget.library.serverId!,
|
||
libraryKey: widget.library.globalKey,
|
||
// Pre-populated values arrive only from backends that bundle them
|
||
// with the category listing (Jellyfin's `/Items/Filters`). The empty
|
||
// map for Plex libraries falls through to lazy `getFilterValues`.
|
||
cachedValues: _jellyfinFilterValues.isEmpty ? null : _jellyfinFilterValues,
|
||
onFiltersChanged: (filters) async {
|
||
setState(() {
|
||
_selectedFilters.clear();
|
||
_selectedFilters.addAll(filters);
|
||
});
|
||
|
||
// Save filters to storage
|
||
final storage = await StorageService.getInstance();
|
||
await storage.saveLibraryFilters(filters, sectionId: widget.library.globalKey);
|
||
|
||
unawaited(_loadItems());
|
||
unawaited(_loadFirstCharacters());
|
||
},
|
||
),
|
||
);
|
||
}
|
||
|
||
void _showSortBottomSheet() {
|
||
SelectKeyUpSuppressor.suppressSelectUntilKeyUp();
|
||
// Track pending state in local variables so the callbacks don't trigger
|
||
// setState/_loadItems while the sheet is open (which would steal focus).
|
||
MediaSort? pendingSort = _selectedSort;
|
||
bool pendingDescending = _isSortDescending;
|
||
bool pendingCleared = false;
|
||
OverlaySheetController.of(context)
|
||
.show(
|
||
builder: (context) => SortBottomSheet(
|
||
sortOptions: _sortOptions,
|
||
selectedSort: _selectedSort,
|
||
isSortDescending: _isSortDescending,
|
||
onSortChanged: (sort, descending) {
|
||
pendingSort = sort;
|
||
pendingDescending = descending;
|
||
pendingCleared = false;
|
||
},
|
||
onClear: () {
|
||
pendingSort = null;
|
||
pendingDescending = false;
|
||
pendingCleared = true;
|
||
},
|
||
),
|
||
)
|
||
.then((_) {
|
||
if (!mounted) return;
|
||
if (pendingCleared) {
|
||
setState(() {
|
||
_selectedSort = null;
|
||
_isSortDescending = false;
|
||
});
|
||
_loadItems();
|
||
_loadFirstCharacters();
|
||
} else if (pendingSort != null &&
|
||
(pendingSort!.key != _selectedSort?.key || pendingDescending != _isSortDescending)) {
|
||
setState(() {
|
||
_selectedSort = pendingSort;
|
||
_isSortDescending = pendingDescending;
|
||
});
|
||
StorageService.getInstance().then((storage) {
|
||
storage.saveLibrarySort(widget.library.globalKey, pendingSort!.key, descending: pendingDescending);
|
||
});
|
||
_loadItems();
|
||
_loadFirstCharacters();
|
||
}
|
||
});
|
||
}
|
||
|
||
/// Navigate focus from chips down to the grid item.
|
||
/// Restores focus to the previously focused item if content hasn't changed.
|
||
void _navigateToGrid() {
|
||
// In folder mode, firstItemFocusNode is attached to the first folder tree item
|
||
if (_selectedGrouping == 'folders') {
|
||
firstItemFocusNode.requestFocus();
|
||
return;
|
||
}
|
||
|
||
if (totalSize == 0) return;
|
||
|
||
final targetIndex =
|
||
shouldRestoreGridFocus && lastFocusedGridIndex! < totalSize && loadedItems.containsKey(lastFocusedGridIndex!)
|
||
? lastFocusedGridIndex!
|
||
: 0;
|
||
|
||
// Drop the chip's focus first so the targeted grid item's request isn't
|
||
// racing against the chip's still-held primary focus state. Without this,
|
||
// dpad DOWN from a chip occasionally fails to move focus to the grid.
|
||
if (FocusManager.instance.primaryFocus == _groupingChipFocusNode ||
|
||
FocusManager.instance.primaryFocus == _filtersChipFocusNode ||
|
||
FocusManager.instance.primaryFocus == _sortChipFocusNode) {
|
||
FocusManager.instance.primaryFocus?.unfocus();
|
||
}
|
||
|
||
// Use firstItemFocusNode for index 0 (matches _buildMediaCardItem)
|
||
final target = targetIndex == 0
|
||
? firstItemFocusNode
|
||
: getGridItemFocusNode(targetIndex, prefix: 'browse_grid_item');
|
||
|
||
// Defer to a post-frame so the focus node has a chance to attach if the
|
||
// grid item is being built/rebuilt in the same frame.
|
||
if (target.context != null) {
|
||
target.requestFocus();
|
||
} else {
|
||
WidgetsBinding.instance.addPostFrameCallback((_) {
|
||
if (mounted) target.requestFocus();
|
||
});
|
||
}
|
||
}
|
||
|
||
/// Navigate from the alpha jump bar to the nearest visible grid item.
|
||
/// After a jump-scroll the previously focused item is off-screen (and its
|
||
/// FocusNode detached), so we target the last-column item in the first
|
||
/// visible row — the grid cell closest to the alpha bar.
|
||
void _navigateToGridNearScroll() {
|
||
final columnCount = _scrollMetrics.columnCount;
|
||
if (totalSize == 0 || columnCount < 1) return;
|
||
|
||
final row = _currentFirstVisibleIndex.value ~/ columnCount;
|
||
var targetIndex = ((row + 1) * columnCount - 1).clamp(0, totalSize - 1);
|
||
|
||
// Find nearest loaded item — skeleton cards have no FocusNode
|
||
if (!loadedItems.containsKey(targetIndex)) {
|
||
// Search backwards first (items above are more likely visible)
|
||
int? found;
|
||
for (var i = targetIndex - 1; i >= 0; i--) {
|
||
if (loadedItems.containsKey(i)) {
|
||
found = i;
|
||
break;
|
||
}
|
||
}
|
||
// Then search forwards
|
||
if (found == null) {
|
||
for (var i = targetIndex + 1; i < totalSize; i++) {
|
||
if (loadedItems.containsKey(i)) {
|
||
found = i;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
if (found == null) return;
|
||
targetIndex = found;
|
||
}
|
||
|
||
if (targetIndex == 0) {
|
||
firstItemFocusNode.requestFocus();
|
||
} else {
|
||
getGridItemFocusNode(targetIndex, prefix: 'browse_grid_item').requestFocus();
|
||
}
|
||
}
|
||
|
||
/// Navigate focus from grid up to the chips bar
|
||
void _navigateToChips() {
|
||
_groupingChipFocusNode.requestFocus();
|
||
}
|
||
|
||
/// Navigate focus to the sidebar
|
||
void _navigateToSidebar() {
|
||
MainScreenFocusScope.of(context)?.focusSidebar();
|
||
}
|
||
|
||
/// Navigate focus to the alpha jump bar
|
||
void _navigateToAlphaJumpBar() {
|
||
_alphaJumpBarFocusNode.requestFocus();
|
||
}
|
||
|
||
/// Whether the device is a phone (not tablet/desktop/TV).
|
||
bool _isPhone(BuildContext context) => PlatformDetector.isPhone(context);
|
||
|
||
/// The letter currently visible at the top of the grid, determined by
|
||
/// how many items we've scrolled past relative to the API's cumulative
|
||
/// firstCharacter counts.
|
||
String _alphaLetterFor(int index) =>
|
||
_alphaStrategy.currentLetter(index, _alphaHelper, jellyfinAlphaPrefix: _jellyfinAlphaPrefix);
|
||
|
||
/// Whether the alpha jump bar should be shown.
|
||
/// Only shown when sorting by title (titleSort) and not in folders mode.
|
||
bool get _shouldShowAlphaJumpBar => _alphaStrategy.shouldShow(
|
||
totalItemCount: totalSize,
|
||
loadedCharacterCount: _firstCharacters.length,
|
||
sortKey: _selectedSort?.key,
|
||
isFolderGrouping: _selectedGrouping == 'folders',
|
||
jellyfinAlphaPrefix: _jellyfinAlphaPrefix,
|
||
isPhone: _isPhone(context),
|
||
);
|
||
|
||
/// Fetch first characters for the current library/filter state
|
||
Future<void> _loadFirstCharacters({int? requestId}) async {
|
||
final currentRequestId = requestId ?? ++_firstCharactersRequestId;
|
||
final filterParams = Map<String, String>.from(_selectedFilters);
|
||
final typeId = _getGroupingTypeId();
|
||
|
||
try {
|
||
final result = await _alphaStrategy.loadCharacters(
|
||
filters: filterParams,
|
||
typeId: typeId.isNotEmpty ? int.tryParse(typeId) : null,
|
||
);
|
||
if (!mounted || currentRequestId != _firstCharactersRequestId) return;
|
||
setState(() {
|
||
_firstCharacters = result.chars;
|
||
_alphaHelper = result.helper;
|
||
});
|
||
} catch (_) {
|
||
// Non-critical — hide the bar on failure
|
||
if (!mounted || currentRequestId != _firstCharactersRequestId) return;
|
||
setState(() {
|
||
_firstCharacters = [];
|
||
_alphaHelper = AlphaJumpHelper(const []);
|
||
});
|
||
}
|
||
}
|
||
|
||
/// Track scroll position and trigger debounced range loading.
|
||
void _onScrollChanged() {
|
||
// The inner controller (PrimaryScrollController) is shared across tabs.
|
||
// Skip if this tab isn't active so we don't react to a sibling tab's
|
||
// scroll events.
|
||
if (!widget.isActive) return;
|
||
|
||
// Debounced scroll-idle handler: load visible range when scrolling settles
|
||
_scrollIdleTimer?.cancel();
|
||
_scrollIdleTimer = Timer(const Duration(milliseconds: 200), () {
|
||
if (!mounted) return;
|
||
// Discard stale in-flight tracking from eager prefetch during scroll so
|
||
// ensureRangeLoaded sees the full gap at the settled position.
|
||
clearPendingRanges();
|
||
final range = _computeVisibleRange();
|
||
if (range != null) {
|
||
ensureRangeLoaded(range.firstIndex, range.visibleCount, buffer: _activeFetchSize ~/ 2);
|
||
evictDistantItems(range.firstIndex, maxKeep: 500, threshold: 600);
|
||
evictDistantFocusNodes(range.firstIndex);
|
||
}
|
||
});
|
||
|
||
// Eager prefetch: fetch data before scroll stops
|
||
final range = _computeVisibleRange();
|
||
if (range != null) {
|
||
prefetchAhead(range.firstIndex, range.visibleCount, pageSize: _activeFetchSize);
|
||
}
|
||
|
||
if (!_shouldShowAlphaJumpBar || !_scrollMetrics.isUsable) return;
|
||
|
||
// During a jump animation, skip alpha bar processing to avoid flashing.
|
||
if (_isJumpScrolling) return;
|
||
|
||
// If pinned from a completed jump, the next scroll event must be
|
||
// user-initiated (touch drag, mouse wheel, etc.) — clear the pin
|
||
// and resume normal tracking.
|
||
if (_hasJumpPin) {
|
||
_hasJumpPin = false;
|
||
}
|
||
|
||
// Throttle alpha bar updates to ~50fps, with a trailing-edge timer
|
||
// so the final scroll position always gets an update
|
||
final now = DateTime.now();
|
||
if (_lastAlphaUpdate == null || now.difference(_lastAlphaUpdate!) >= const Duration(milliseconds: 20)) {
|
||
_lastAlphaUpdate = now;
|
||
_updateVisibleIndex();
|
||
}
|
||
_alphaUpdateTimer?.cancel();
|
||
_alphaUpdateTimer = Timer(const Duration(milliseconds: 20), () {
|
||
if (mounted) _updateVisibleIndex();
|
||
});
|
||
}
|
||
|
||
/// Recompute the first-visible-index from the current scroll offset.
|
||
void _updateVisibleIndex() {
|
||
final pos = _innerPosition;
|
||
if (pos == null) return;
|
||
final offset = pos.pixels;
|
||
final firstInRow = _itemIndexFromScrollOffset(offset);
|
||
// Use the last item in the first visible row so the highlighted letter
|
||
// updates as soon as items with a new letter appear in that row.
|
||
final maxIndex = totalSize > 0 ? totalSize - 1 : 0;
|
||
final lastInRow = (firstInRow + _scrollMetrics.columnCount - 1).clamp(0, maxIndex);
|
||
if (lastInRow != _currentFirstVisibleIndex.value) {
|
||
_currentFirstVisibleIndex.value = lastInRow;
|
||
}
|
||
}
|
||
|
||
/// Compute the first visible item index from a scroll offset.
|
||
/// Chips bar is the first sliver (height = _chipsBarHeight) followed by the
|
||
/// grid's own top padding before the first row.
|
||
int _itemIndexFromScrollOffset(double offset) {
|
||
return _scrollMetrics.itemIndexFromScrollOffset(
|
||
offset,
|
||
contentStartOffset: _contentStartScrollOffset,
|
||
totalSize: totalSize,
|
||
);
|
||
}
|
||
|
||
double get _contentStartScrollOffset => _chipsBarHeight + _effectiveTopPadding;
|
||
|
||
/// Handle a tap on the letter at [targetIndex] in the alpha bar. The
|
||
/// active [LibraryAlphaBarStrategy] owns the per-backend behaviour and
|
||
/// invokes one of the two callbacks — Plex scrolls the grid to the
|
||
/// cumulative item offset, Jellyfin toggles a `NameStartsWith` filter
|
||
/// (matches the JF web client UX).
|
||
void _jumpToIndex(int targetIndex) {
|
||
_alphaStrategy.onLetterPressed(
|
||
targetIndex,
|
||
_alphaHelper,
|
||
currentJellyfinPrefix: _jellyfinAlphaPrefix,
|
||
onPlexJump: _scrollGridToIndex,
|
||
onJellyfinPrefixChange: _applyJellyfinAlphaPrefix,
|
||
);
|
||
}
|
||
|
||
/// Scroll the current layout so the item at [targetIndex] becomes the first visible
|
||
/// row. Used by [PlexAlphaBarStrategy] via [_jumpToIndex].
|
||
void _scrollGridToIndex(int targetIndex) {
|
||
_jumpScrollGeneration++;
|
||
_isJumpScrolling = true;
|
||
|
||
_hasJumpPin = true;
|
||
final clamped = targetIndex.clamp(0, totalSize > 0 ? totalSize - 1 : 0);
|
||
_currentFirstVisibleIndex.value = clamped;
|
||
|
||
_scrollToItemIndex(clamped);
|
||
}
|
||
|
||
/// Apply the new Jellyfin `NameStartsWith` prefix from the alpha bar and
|
||
/// refetch from the top of the now-filtered dataset. Used by
|
||
/// [JellyfinAlphaBarStrategy] via [_jumpToIndex].
|
||
void _applyJellyfinAlphaPrefix(String? nextPrefix) {
|
||
setState(() {
|
||
_jellyfinAlphaPrefix = nextPrefix;
|
||
// Clear loaded items + total so the grid blanks while the new filtered
|
||
// page loads. PaginatedItemLoader internals will repopulate from
|
||
// offset 0 once the next fetchPage call returns.
|
||
resetPaginationState();
|
||
isLoading = true;
|
||
});
|
||
_scheduleTopScrollReset();
|
||
_loadItems();
|
||
}
|
||
|
||
/// Scroll the current layout so that [index] is visible just below the chips bar
|
||
void _scrollToItemIndex(int index) {
|
||
final pos = _innerPosition;
|
||
if (!_scrollMetrics.isUsable || pos == null) {
|
||
_isJumpScrolling = false;
|
||
return;
|
||
}
|
||
|
||
// Position the target row at the top of the viewport. Chips and the grid's
|
||
// top padding both precede the items in scroll coordinates.
|
||
final offset = _scrollMetrics.scrollOffsetForItemIndex(index, contentStartOffset: _contentStartScrollOffset);
|
||
|
||
final gen = _jumpScrollGeneration;
|
||
final maxExtent = pos.maxScrollExtent;
|
||
if (!maxExtent.isFinite) {
|
||
_isJumpScrolling = false;
|
||
return;
|
||
}
|
||
final clampedOffset = offset.clamp(0.0, maxExtent);
|
||
|
||
// If a newer jump already superseded this one, skip the animation
|
||
// entirely — the next call will handle the final position.
|
||
if (gen != _jumpScrollGeneration) {
|
||
pos.jumpTo(clampedOffset);
|
||
return;
|
||
}
|
||
|
||
pos.animateTo(clampedOffset, duration: const Duration(milliseconds: 300), curve: Curves.easeInOut).then((_) {
|
||
// Only clear the flag if no newer jump has started.
|
||
if (mounted && gen == _jumpScrollGeneration) {
|
||
_isJumpScrolling = false;
|
||
}
|
||
});
|
||
}
|
||
|
||
@override
|
||
Widget build(BuildContext context) {
|
||
super.build(context); // Required for AutomaticKeepAliveClientMixin
|
||
|
||
// Chips are inline as a floating sliver in the inner scroll. The alpha
|
||
// jump bar is the only overlay; we offset it by the typical app bar height
|
||
// so it isn't obscured by the floating outer header. Using MediaQuery
|
||
// (not the absorber handle) avoids rebuilding during layout — listening to
|
||
// the handle from a builder fires notifyListeners during the build phase
|
||
// and triggers a setState-in-build assertion.
|
||
final media = MediaQuery.of(context);
|
||
final overlayTopPadding = media.padding.top + kToolbarHeight;
|
||
|
||
return Stack(
|
||
children: [
|
||
Positioned.fill(child: _buildScrollableContent()),
|
||
if (_shouldShowAlphaJumpBar)
|
||
Positioned(
|
||
top: overlayTopPadding,
|
||
right: 0,
|
||
bottom: 0,
|
||
child: _isPhone(context)
|
||
? ValueListenableBuilder<int>(
|
||
valueListenable: _currentFirstVisibleIndex,
|
||
builder: (context, visibleIndex, _) => ValueListenableBuilder<bool>(
|
||
valueListenable: _isScrollActive,
|
||
builder: (context, scrolling, _) => AlphaScrollHandle(
|
||
firstCharacters: _firstCharacters,
|
||
onJump: _jumpToIndex,
|
||
currentLetter: _alphaLetterFor(visibleIndex),
|
||
isScrolling: scrolling,
|
||
),
|
||
),
|
||
)
|
||
: ValueListenableBuilder<int>(
|
||
valueListenable: _currentFirstVisibleIndex,
|
||
builder: (context, visibleIndex, _) => AlphaJumpBar(
|
||
firstCharacters: _firstCharacters,
|
||
onJump: _jumpToIndex,
|
||
currentLetter: _alphaLetterFor(visibleIndex),
|
||
focusNode: _alphaJumpBarFocusNode,
|
||
onNavigateLeft: _navigateToGridNearScroll,
|
||
onBack: _navigateToGridNearScroll,
|
||
),
|
||
),
|
||
),
|
||
],
|
||
);
|
||
}
|
||
|
||
/// Builds the scrollable content with chips, then either folder tree or grid/list.
|
||
Widget _buildScrollableContent() {
|
||
final isFolders = _selectedGrouping == 'folders';
|
||
|
||
Widget scrollView = NotificationListener<ScrollNotification>(
|
||
onNotification: (notification) {
|
||
// Track scroll activity for phone scroll handle and range-load gating
|
||
if (notification is ScrollStartNotification) {
|
||
_isScrollActive.value = true;
|
||
_scrollActivityTimer?.cancel();
|
||
} else if (notification is ScrollEndNotification) {
|
||
_scrollActivityTimer?.cancel();
|
||
_scrollActivityTimer = Timer(const Duration(milliseconds: 100), () {
|
||
if (mounted) _isScrollActive.value = false;
|
||
});
|
||
}
|
||
return false;
|
||
},
|
||
child: Builder(
|
||
builder: (context) => CustomScrollView(
|
||
// No explicit controller: this picks up NestedScrollView's
|
||
// PrimaryScrollController, which is what wires inner scroll deltas
|
||
// through to the outer floating header.
|
||
// Allow focus decoration to render outside scroll bounds.
|
||
clipBehavior: Clip.none,
|
||
slivers: [
|
||
// Capture-only sliver: an invisible Builder whose context lives
|
||
// inside this CustomScrollView, used to grab the per-tab
|
||
// ScrollPosition. NSV's shared inner controller has one position
|
||
// per kept-alive tab; we need this tab's specific one.
|
||
SliverToBoxAdapter(
|
||
child: Builder(
|
||
builder: (innerCtx) {
|
||
WidgetsBinding.instance.addPostFrameCallback((_) {
|
||
if (mounted) {
|
||
_bindInnerPosition(Scrollable.maybeOf(innerCtx)?.position);
|
||
}
|
||
});
|
||
return const SizedBox.shrink();
|
||
},
|
||
),
|
||
),
|
||
// Floating chips: scroll off with content but snap back into view
|
||
// on upward direction reversal, matching the outer floating
|
||
// SliverAppBar's behavior.
|
||
SliverPersistentHeader(
|
||
floating: true,
|
||
pinned: false,
|
||
delegate: _ChipsBarDelegate(builder: (_) => _buildChipsBar(), height: _chipsBarHeight),
|
||
),
|
||
..._buildContentSlivers(),
|
||
],
|
||
),
|
||
),
|
||
);
|
||
|
||
// Folders mode previously had its own RefreshIndicator inside FolderTreeView;
|
||
// it now lives at this level since FolderTreeView is a sliver.
|
||
if (isFolders) {
|
||
scrollView = RefreshIndicator(
|
||
onRefresh: () async {
|
||
await _folderTreeKey.currentState?.refresh();
|
||
},
|
||
child: scrollView,
|
||
);
|
||
}
|
||
|
||
return scrollView;
|
||
}
|
||
|
||
/// Self-healing: when a skeleton is rendered after scrolling stops,
|
||
/// ensure the visible range gets loaded even if the scroll-idle path missed it.
|
||
void _scheduleRangeLoad() {
|
||
if (_rangeLoadScheduled || _isScrollActive.value) return;
|
||
_rangeLoadScheduled = true;
|
||
WidgetsBinding.instance.addPostFrameCallback((_) {
|
||
_rangeLoadScheduled = false;
|
||
if (!mounted) return;
|
||
final range = _computeVisibleRange();
|
||
if (range != null) {
|
||
ensureRangeLoaded(range.firstIndex, range.visibleCount, buffer: _activeFetchSize ~/ 2);
|
||
}
|
||
});
|
||
}
|
||
|
||
/// Returns the first-visible index and visible count from the scroll
|
||
/// position + layout metrics, or null if the viewport isn't measured yet.
|
||
({int firstIndex, int visibleCount})? _computeVisibleRange() {
|
||
final pos = _innerPosition;
|
||
if (!_scrollMetrics.isUsable || pos == null) return null;
|
||
final offset = pos.pixels;
|
||
final viewportHeight = pos.viewportDimension;
|
||
if (!viewportHeight.isFinite) return null;
|
||
|
||
final visibleCount = _scrollMetrics.visibleItemCount(viewportHeight);
|
||
if (visibleCount <= 0) return null;
|
||
return (firstIndex: _itemIndexFromScrollOffset(offset), visibleCount: visibleCount);
|
||
}
|
||
|
||
/// Compute initial fetch size based on viewport dimensions.
|
||
int _calculateInitialFetchSize() {
|
||
try {
|
||
final screenSize = MediaQuery.sizeOf(context);
|
||
final density = context.settingsRead(SettingsService.libraryDensity);
|
||
final maxExtent = GridSizeCalculator.getMaxCrossAxisExtent(context, density);
|
||
final crossAxisSpacing = GridLayoutConstants.crossAxisSpacing;
|
||
final columnCount = ((screenSize.width + crossAxisSpacing) / (maxExtent + crossAxisSpacing)).ceil().clamp(1, 100);
|
||
final itemWidth = screenSize.width / columnCount;
|
||
final itemHeight = itemWidth / GridLayoutConstants.posterAspectRatio;
|
||
final rowHeight = itemHeight + GridLayoutConstants.mainAxisSpacing;
|
||
if (rowHeight <= 0) return _activeFetchSize;
|
||
final visibleRows = (screenSize.height / rowHeight).ceil() + 1;
|
||
final visibleCount = visibleRows * columnCount;
|
||
if (_isJellyfinLibrary) {
|
||
return (visibleCount * 2).clamp(36, _jellyfinFetchSize).toInt();
|
||
}
|
||
return (visibleCount * 3).clamp(100, 500).toInt();
|
||
} catch (_) {
|
||
return _activeFetchSize;
|
||
}
|
||
}
|
||
|
||
/// Prefetch images for items near the viewport to reduce pop-in.
|
||
void _prefetchImages(int startIndex, List<MediaItem> items) {
|
||
final pos = _innerPosition;
|
||
if (pos == null || !_scrollMetrics.isUsable) return;
|
||
|
||
final offset = pos.pixels;
|
||
final viewportHeight = pos.viewportDimension;
|
||
if (!viewportHeight.isFinite) return;
|
||
final firstVisible = _itemIndexFromScrollOffset(offset);
|
||
final itemWidth = _scrollMetrics.itemWidth;
|
||
final itemHeight = _scrollMetrics.itemHeight;
|
||
if (itemWidth <= 0 || itemHeight <= 0) return;
|
||
|
||
final visibleEnd = firstVisible + _scrollMetrics.visibleItemCount(viewportHeight);
|
||
// Prefetch 2 rows beyond visible area
|
||
final prefetchEnd = visibleEnd + 2 * _scrollMetrics.columnCount;
|
||
|
||
final client = getMediaClientForLibrary();
|
||
final devicePixelRatio = MediaImageHelper.effectiveDevicePixelRatio(context);
|
||
final episodePosterMode = context.settingsRead(SettingsService.episodePosterMode);
|
||
|
||
for (var i = 0; i < items.length; i++) {
|
||
final index = startIndex + i;
|
||
if (index < firstVisible || index > prefetchEnd) continue;
|
||
|
||
final item = items[i];
|
||
final thumb = item.posterThumb(mode: episodePosterMode);
|
||
if (thumb == null || thumb.isEmpty) continue;
|
||
final imageType = item.usesWideAspectRatio(episodePosterMode) ? ImageType.thumb : ImageType.poster;
|
||
|
||
final imageUrl = MediaImageHelper.getOptimizedImageUrl(
|
||
client: client,
|
||
thumbPath: thumb,
|
||
maxWidth: itemWidth,
|
||
maxHeight: itemHeight,
|
||
devicePixelRatio: devicePixelRatio,
|
||
imageType: imageType,
|
||
);
|
||
if (imageUrl.isEmpty) continue;
|
||
|
||
final scaledWidth = itemWidth * devicePixelRatio;
|
||
final scaledHeight = itemHeight * devicePixelRatio;
|
||
final (_, memHeight) = MediaImageHelper.getMemCacheDimensions(
|
||
displayWidth: scaledWidth.isFinite && scaledWidth > 0 ? scaledWidth.round() : 0,
|
||
displayHeight: scaledHeight.isFinite && scaledHeight > 0 ? scaledHeight.round() : 0,
|
||
imageType: imageType,
|
||
);
|
||
|
||
precacheImage(
|
||
CachedNetworkImageProvider(
|
||
imageUrl,
|
||
cacheManager: PlexImageCacheManager.instance,
|
||
headers: const {'User-Agent': 'Plezy'},
|
||
maxHeight: memHeight,
|
||
),
|
||
context,
|
||
).ignore();
|
||
}
|
||
}
|
||
|
||
/// Whether the filters chip is visible
|
||
bool get _isFiltersChipVisible =>
|
||
(_filters.isNotEmpty || _selectedFilters.isNotEmpty) && _selectedGrouping != 'folders';
|
||
|
||
/// Whether the sort chip is visible
|
||
bool get _isSortChipVisible => _sortOptions.isNotEmpty && _selectedGrouping != 'folders';
|
||
|
||
/// Builds the chips bar widget
|
||
Widget _buildChipsBar() {
|
||
VoidCallback? groupingNavigateRight;
|
||
if (_isFiltersChipVisible) {
|
||
groupingNavigateRight = () => _filtersChipFocusNode.requestFocus();
|
||
} else if (_isSortChipVisible) {
|
||
groupingNavigateRight = () => _sortChipFocusNode.requestFocus();
|
||
}
|
||
|
||
return Container(
|
||
color: Theme.of(context).scaffoldBackgroundColor,
|
||
padding: const EdgeInsets.symmetric(horizontal: 16),
|
||
alignment: Alignment.centerLeft,
|
||
child: Row(
|
||
mainAxisSize: MainAxisSize.min,
|
||
children: [
|
||
// Grouping chip
|
||
FocusableFilterChip(
|
||
focusNode: _groupingChipFocusNode,
|
||
icon: Symbols.category_rounded,
|
||
label: _getGroupingLabel(_selectedGrouping),
|
||
onPressed: _showGroupingBottomSheet,
|
||
onNavigateDown: _navigateToGrid,
|
||
onNavigateUp: widget.onBack,
|
||
onNavigateLeft: _navigateToSidebar,
|
||
onNavigateRight: groupingNavigateRight,
|
||
onBack: widget.onBack,
|
||
),
|
||
const SizedBox(width: 8),
|
||
// Filters chip
|
||
if (_isFiltersChipVisible)
|
||
FocusableFilterChip(
|
||
focusNode: _filtersChipFocusNode,
|
||
icon: Symbols.filter_alt_rounded,
|
||
label: _selectedFilters.isEmpty
|
||
? t.libraries.filters
|
||
: t.libraries.filtersWithCount(count: _selectedFilters.length),
|
||
onPressed: _showFiltersBottomSheet,
|
||
onNavigateDown: _navigateToGrid,
|
||
onNavigateUp: widget.onBack,
|
||
onNavigateLeft: () => _groupingChipFocusNode.requestFocus(),
|
||
onNavigateRight: _isSortChipVisible ? () => _sortChipFocusNode.requestFocus() : null,
|
||
onBack: widget.onBack,
|
||
),
|
||
if (_isFiltersChipVisible) const SizedBox(width: 8),
|
||
// Sort chip
|
||
if (_isSortChipVisible)
|
||
FocusableFilterChip(
|
||
focusNode: _sortChipFocusNode,
|
||
icon: Symbols.sort_rounded,
|
||
label: _selectedSort?.title ?? t.libraries.sort,
|
||
onPressed: _showSortBottomSheet,
|
||
onNavigateDown: _navigateToGrid,
|
||
onNavigateUp: widget.onBack,
|
||
onNavigateLeft: _isFiltersChipVisible
|
||
? () => _filtersChipFocusNode.requestFocus()
|
||
: () => _groupingChipFocusNode.requestFocus(),
|
||
onBack: widget.onBack,
|
||
),
|
||
],
|
||
),
|
||
);
|
||
}
|
||
|
||
/// Builds content as slivers for the CustomScrollView
|
||
List<Widget> _buildContentSlivers() {
|
||
// Folders mode: hand off to the FolderTreeView sliver, which owns its own
|
||
// loading/empty/error states.
|
||
if (_selectedGrouping == 'folders') {
|
||
return [
|
||
FolderTreeView(
|
||
key: _folderTreeKey,
|
||
libraryKey: widget.library.id,
|
||
serverId: widget.library.serverId,
|
||
onRefresh: updateItem,
|
||
firstItemFocusNode: firstItemFocusNode,
|
||
onNavigateUp: _navigateToChips,
|
||
),
|
||
];
|
||
}
|
||
|
||
if (isLoading && totalSize == 0 && loadedItems.isEmpty) {
|
||
return [LoadingIndicatorBox.sliver];
|
||
}
|
||
|
||
if (errorMessage != null && loadedItems.isEmpty) {
|
||
return [SliverErrorState(message: errorMessage!, onRetry: _loadContent)];
|
||
}
|
||
|
||
if (totalSize == 0 && !isLoading) {
|
||
return [SliverEmptyState(message: t.libraries.thisLibraryIsEmpty, icon: Symbols.folder_open_rounded)];
|
||
}
|
||
|
||
return [
|
||
SettingsBuilder(
|
||
prefs: const [SettingsService.viewMode, SettingsService.libraryDensity, SettingsService.episodePosterMode],
|
||
builder: (context) => _buildItemsSliver(context),
|
||
),
|
||
];
|
||
}
|
||
|
||
// Top padding for grid content. Chips are inline above the grid now, so this
|
||
// is purely focus-decoration clearance on desktop. Phone has no D-pad
|
||
// focus ring so no extra clearance is needed.
|
||
static const double _gridTopPadding = 6.0;
|
||
static const double _gridTopPaddingPhone = 0.0;
|
||
|
||
/// Width of the alpha jump bar widget
|
||
static const double _alphaJumpBarWidth = 20.0;
|
||
|
||
void _setListScrollMetrics({required int density, required bool usesWideAspectRatio}) {
|
||
if (_listMetricsDensity != density || _listMetricsUsesWideRatio != usesWideAspectRatio) {
|
||
_measuredListRowHeight = null;
|
||
_listMetricsDensity = density;
|
||
_listMetricsUsesWideRatio = usesWideAspectRatio;
|
||
}
|
||
|
||
final itemWidth = MediaCardListLayout.posterWidth(density: density, usesWideAspectRatio: usesWideAspectRatio);
|
||
final itemHeight = MediaCardListLayout.posterHeight(density: density, usesWideAspectRatio: usesWideAspectRatio);
|
||
final rowHeight =
|
||
_measuredListRowHeight ??
|
||
MediaCardListLayout.estimatedRowHeight(density: density, usesWideAspectRatio: usesWideAspectRatio);
|
||
_scrollMetrics = LibraryAlphaScrollMetrics(
|
||
columnCount: 1,
|
||
rowHeight: rowHeight,
|
||
itemWidth: itemWidth,
|
||
itemHeight: itemHeight,
|
||
);
|
||
}
|
||
|
||
Widget _buildMeasuredFirstListItem(Widget child) {
|
||
WidgetsBinding.instance.addPostFrameCallback((_) => _measureFirstListRowHeight());
|
||
return KeyedSubtree(key: _firstListItemKey, child: child);
|
||
}
|
||
|
||
void _measureFirstListRowHeight() {
|
||
if (!mounted) return;
|
||
if (SettingsService.instanceOrNull?.read(SettingsService.viewMode) != ViewMode.list) return;
|
||
final height = (_firstListItemKey.currentContext?.findRenderObject() as RenderBox?)?.size.height;
|
||
if (height == null || height <= 0) return;
|
||
if ((_measuredListRowHeight ?? 0) == height) return;
|
||
_measuredListRowHeight = height;
|
||
_scrollMetrics = _scrollMetrics.copyWith(rowHeight: height);
|
||
_updateVisibleIndex();
|
||
}
|
||
|
||
/// Builds either a sliver list or sliver grid based on the view mode
|
||
Widget _buildItemsSliver(BuildContext context) {
|
||
final svc = SettingsService.instanceOrNull!;
|
||
final viewMode = svc.read(SettingsService.viewMode);
|
||
final libraryDensity = svc.read(SettingsService.libraryDensity);
|
||
final episodePosterMode = svc.read(SettingsService.episodePosterMode);
|
||
final itemCount = totalSize;
|
||
final isPhone = _isPhone(context);
|
||
final topPadding = isPhone ? _gridTopPaddingPhone : _gridTopPadding;
|
||
_effectiveTopPadding = topPadding;
|
||
final rightPadding = _shouldShowAlphaJumpBar && !isPhone ? _alphaJumpBarWidth : 8.0;
|
||
|
||
final useWideRatio = _selectedGrouping == 'episodes' && episodePosterMode == EpisodePosterMode.episodeThumbnail;
|
||
|
||
if (viewMode == ViewMode.list) {
|
||
// In list view, all items are in a single column (first column)
|
||
return SliverPadding(
|
||
padding: EdgeInsets.fromLTRB(8, topPadding, rightPadding, 8),
|
||
sliver: SliverLayoutBuilder(
|
||
builder: (context, _) {
|
||
_setListScrollMetrics(density: libraryDensity, usesWideAspectRatio: useWideRatio);
|
||
return SliverList.builder(
|
||
itemCount: itemCount,
|
||
itemBuilder: (context, index) {
|
||
final child = _buildMediaCardItem(
|
||
index,
|
||
isFirstRow: index == 0,
|
||
isFirstColumn: true, // List view = single column
|
||
isLastColumn: true,
|
||
disableScale: true,
|
||
columnCount: 1,
|
||
itemCount: itemCount,
|
||
);
|
||
return index == 0 ? _buildMeasuredFirstListItem(child) : child;
|
||
},
|
||
);
|
||
},
|
||
),
|
||
);
|
||
} else {
|
||
// In grid view, calculate columns and pass to item builder
|
||
// Use 16:9 aspect ratio when browsing episodes with episode thumbnail mode
|
||
final baseMaxExtent = GridSizeCalculator.getMaxCrossAxisExtent(context, libraryDensity);
|
||
final effectiveMaxExtent = useWideRatio ? baseMaxExtent * 1.8 : baseMaxExtent;
|
||
final hasAlphaBarReservation = rightPadding > 8.0;
|
||
return SliverPadding(
|
||
padding: EdgeInsets.fromLTRB(8, topPadding, rightPadding, 8),
|
||
sliver: SliverLayoutBuilder(
|
||
builder: (context, constraints) {
|
||
// Compute column count from the width the grid would have without the alpha
|
||
// bar's reservation, so toggling the bar doesn't repack the grid into one
|
||
// fewer column and blow up poster size.
|
||
final baselineWidth = constraints.crossAxisExtent + (rightPadding - 8.0);
|
||
final columnCount = GridSizeCalculator.getColumnCount(baselineWidth, effectiveMaxExtent);
|
||
// Cache grid metrics for alpha jump bar scroll calculations
|
||
final itemWidth = constraints.crossAxisExtent / columnCount;
|
||
final itemHeight = itemWidth / GridLayoutConstants.posterAspectRatio;
|
||
_scrollMetrics = LibraryAlphaScrollMetrics(
|
||
columnCount: columnCount,
|
||
rowHeight: itemHeight + GridLayoutConstants.mainAxisSpacing,
|
||
itemWidth: itemWidth,
|
||
itemHeight: itemHeight,
|
||
);
|
||
return SliverGrid.builder(
|
||
gridDelegate: MediaGridDelegate.createDelegate(
|
||
context: context,
|
||
density: libraryDensity,
|
||
useWideAspectRatio: useWideRatio,
|
||
maxCrossAxisExtentOverride: hasAlphaBarReservation ? constraints.crossAxisExtent / columnCount : null,
|
||
),
|
||
itemCount: itemCount,
|
||
itemBuilder: (context, index) => _buildMediaCardItem(
|
||
index,
|
||
isFirstRow: GridSizeCalculator.isFirstRow(index, columnCount),
|
||
isFirstColumn: GridSizeCalculator.isFirstColumn(index, columnCount),
|
||
isLastColumn: (index % columnCount) == (columnCount - 1),
|
||
columnCount: columnCount,
|
||
itemCount: itemCount,
|
||
),
|
||
);
|
||
},
|
||
),
|
||
);
|
||
}
|
||
}
|
||
|
||
Widget _buildMediaCardItem(
|
||
int index, {
|
||
required bool isFirstRow,
|
||
required bool isFirstColumn,
|
||
bool isLastColumn = false,
|
||
bool disableScale = false,
|
||
int columnCount = 1,
|
||
int itemCount = 0,
|
||
}) {
|
||
final item = loadedItems[index];
|
||
|
||
// Show skeleton placeholder for unloaded items
|
||
if (item == null) {
|
||
_scheduleRangeLoad();
|
||
return const SkeletonMediaCard();
|
||
}
|
||
|
||
// Use firstItemFocusNode for index 0 to maintain compatibility with base class
|
||
// All other items get managed focus nodes for restoration
|
||
final focusNode = index == 0 ? firstItemFocusNode : getGridItemFocusNode(index, prefix: 'browse_grid_item');
|
||
|
||
// Explicit row navigation. Default directional focus traversal becomes
|
||
// unreliable while items are mounting/unmounting under fast scrolling and
|
||
// can spuriously jump to overlay widgets like the floating chips header.
|
||
VoidCallback? navigateUp;
|
||
if (isFirstRow) {
|
||
navigateUp = _navigateToChips;
|
||
} else if (columnCount > 0 && index >= columnCount) {
|
||
navigateUp = () => _focusGridItem(index - columnCount);
|
||
}
|
||
|
||
VoidCallback? navigateDown;
|
||
if (columnCount > 0 && index + columnCount < itemCount) {
|
||
navigateDown = () => _focusGridItem(index + columnCount);
|
||
}
|
||
|
||
VoidCallback? navigateLeft;
|
||
if (isFirstColumn) {
|
||
navigateLeft = _navigateToSidebar;
|
||
} else if (index > 0) {
|
||
navigateLeft = () => _focusGridItem(index - 1);
|
||
}
|
||
|
||
VoidCallback? navigateRight;
|
||
if (isLastColumn && _shouldShowAlphaJumpBar && !_isPhone(context)) {
|
||
navigateRight = _navigateToAlphaJumpBar;
|
||
} else if (!isLastColumn && index + 1 < itemCount) {
|
||
navigateRight = () => _focusGridItem(index + 1);
|
||
}
|
||
|
||
return FocusableMediaCard(
|
||
key: Key(item.id),
|
||
item: item,
|
||
focusNode: focusNode,
|
||
disableScale: disableScale,
|
||
onRefresh: updateItem,
|
||
onNavigateUp: navigateUp,
|
||
onNavigateDown: navigateDown,
|
||
onNavigateLeft: navigateLeft,
|
||
onNavigateRight: navigateRight,
|
||
onBack: widget.onBack,
|
||
onFocusChange: (hasFocus) => trackGridItemFocus(index, hasFocus),
|
||
onListRefresh: _loadItems,
|
||
);
|
||
}
|
||
|
||
/// Move focus to the grid item at [targetIndex] (or its skeleton's row).
|
||
/// Used by the explicit dpad navigation handlers.
|
||
void _focusGridItem(int targetIndex) {
|
||
if (targetIndex < 0 || targetIndex >= totalSize) return;
|
||
final node = targetIndex == 0 ? firstItemFocusNode : getGridItemFocusNode(targetIndex, prefix: 'browse_grid_item');
|
||
if (node.context != null) {
|
||
node.requestFocus();
|
||
} else {
|
||
WidgetsBinding.instance.addPostFrameCallback((_) {
|
||
if (mounted) node.requestFocus();
|
||
});
|
||
}
|
||
}
|
||
}
|
||
|
||
/// SliverPersistentHeader delegate for the chips bar. Fixed-height floating
|
||
/// header that snaps in on scroll direction reversal.
|
||
class _ChipsBarDelegate extends SliverPersistentHeaderDelegate {
|
||
final WidgetBuilder builder;
|
||
final double height;
|
||
|
||
const _ChipsBarDelegate({required this.builder, required this.height});
|
||
|
||
@override
|
||
double get minExtent => height;
|
||
|
||
@override
|
||
double get maxExtent => height;
|
||
|
||
@override
|
||
Widget build(BuildContext context, double shrinkOffset, bool overlapsContent) {
|
||
return SizedBox(height: height, child: builder(context));
|
||
}
|
||
|
||
@override
|
||
bool shouldRebuild(covariant _ChipsBarDelegate oldDelegate) =>
|
||
builder != oldDelegate.builder || height != oldDelegate.height;
|
||
}
|