131 lines
4.0 KiB
Dart
131 lines
4.0 KiB
Dart
import 'package:flutter/material.dart';
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import '../media/media_item.dart';
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import '../services/settings_service.dart';
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import 'media_grid_delegate.dart';
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import 'sliver_cross_axis_layout_builder.dart';
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@immutable
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class MediaCardSliverPosition {
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const MediaCardSliverPosition({
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required this.index,
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required this.itemCount,
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required this.columnCount,
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required this.isGrid,
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this.layoutEpoch,
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});
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final int index;
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final int itemCount;
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final int columnCount;
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final bool isGrid;
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final Object? layoutEpoch;
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bool get isFirstRow => index < columnCount;
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bool get isFirstColumn => index % columnCount == 0;
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bool get isLastColumn => index % columnCount == columnCount - 1;
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bool get disableScale => !isGrid;
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}
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typedef MediaCardSliverItemBuilder = Widget Function(BuildContext context, MediaCardSliverPosition position);
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/// Shared list/grid sliver switch for media-card surfaces.
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///
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/// Consumers retain card construction and focus policy while this widget owns
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/// the identical sliver wrappers, grid geometry, and delegate configuration.
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class MediaCardSliverLayout extends StatelessWidget {
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const MediaCardSliverLayout({
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super.key,
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required this.viewMode,
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required this.itemCount,
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required this.density,
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required this.padding,
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required this.itemBuilder,
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this.fullBleedImage = false,
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this.useWideAspectRatio = false,
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this.shape,
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this.usePaddingAware = false,
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this.horizontalPadding = 0,
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this.crossAxisExtentForColumnCount,
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this.onGridGeometry,
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this.listEpoch,
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this.gridEpochBuilder,
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});
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final ViewMode viewMode;
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final int itemCount;
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final int density;
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final EdgeInsetsGeometry padding;
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final MediaCardSliverItemBuilder itemBuilder;
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final bool fullBleedImage;
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final bool useWideAspectRatio;
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final CardShape? shape;
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final bool usePaddingAware;
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final double horizontalPadding;
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final double? Function(double crossAxisExtent)? crossAxisExtentForColumnCount;
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final ValueChanged<MediaGridGeometry>? onGridGeometry;
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final Object? listEpoch;
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final Object? Function(MediaGridGeometry geometry)? gridEpochBuilder;
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@override
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Widget build(BuildContext context) {
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if (viewMode == ViewMode.list) {
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return SliverPadding(
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padding: padding,
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sliver: SliverList.builder(
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addAutomaticKeepAlives: false,
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addSemanticIndexes: false,
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itemCount: itemCount,
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itemBuilder: (context, index) => itemBuilder(
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context,
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MediaCardSliverPosition(
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index: index,
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itemCount: itemCount,
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columnCount: 1,
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isGrid: false,
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layoutEpoch: listEpoch,
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),
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),
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),
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);
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}
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return SliverPadding(
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padding: padding,
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sliver: SliverCrossAxisLayoutBuilder(
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builder: (context, crossAxisExtent) {
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final geometry = MediaGridGeometry.resolve(
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context: context,
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crossAxisExtent: crossAxisExtent,
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crossAxisExtentForColumnCount: crossAxisExtentForColumnCount?.call(crossAxisExtent),
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density: density,
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useWideAspectRatio: useWideAspectRatio,
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fullBleedImage: fullBleedImage,
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shape: shape,
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usePaddingAware: usePaddingAware,
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horizontalPadding: horizontalPadding,
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);
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onGridGeometry?.call(geometry);
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final layoutEpoch = gridEpochBuilder?.call(geometry);
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return SliverGrid.builder(
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addAutomaticKeepAlives: false,
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addSemanticIndexes: false,
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gridDelegate: geometry.delegate,
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itemCount: itemCount,
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itemBuilder: (context, index) => itemBuilder(
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context,
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MediaCardSliverPosition(
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index: index,
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itemCount: itemCount,
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columnCount: geometry.columnCount,
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isGrid: true,
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layoutEpoch: layoutEpoch,
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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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