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optimize rendering of large texts

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wanghongenpin
2026-04-09 21:32:22 +08:00
parent 22fc0d3ba5
commit 841d0fd449
3 changed files with 359 additions and 10 deletions
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test/virtualized_highlight_text_test.dart Normal file
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import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:proxypin/ui/component/search/search_controller.dart';
import 'package:proxypin/ui/component/search/virtualized_highlight_text.dart';
import 'package:scrollable_positioned_list_nic/scrollable_positioned_list_nic.dart';
void main() {
group('VirtualizedHighlightText', () {
testWidgets('renders through ScrollablePositionedList and updates match counts', (tester) async {
final controller = SearchTextController();
BuildContext? hostContext;
final text = List.generate(260, (index) => index == 180 ? 'line $index target' : 'line $index').join('\n');
await tester.pumpWidget(MaterialApp(
home: Scaffold(
body: Builder(builder: (context) {
hostContext = context;
return VirtualizedHighlightText(
text: text,
language: 'javascript',
searchController: controller,
chunkLines: 80,
);
}),
),
));
controller.patternController.text = 'target';
controller.showSearchOverlay(hostContext!, top: 0, right: 0);
await tester.pump();
await tester.pumpAndSettle();
expect(find.byType(ScrollablePositionedList), findsOneWidget);
expect(controller.totalMatchCount.value, 1);
await _disposeController(tester, controller);
});
testWidgets('scrolls to the active match line when navigating', (tester) async {
final controller = SearchTextController();
BuildContext? hostContext;
final text = List.generate(
320,
(index) => index == 24 || index == 260 ? 'line $index target' : 'line $index',
).join('\n');
await tester.pumpWidget(MaterialApp(
home: Scaffold(
body: Builder(builder: (context) {
hostContext = context;
return VirtualizedHighlightText(
text: text,
language: 'javascript',
searchController: controller,
chunkLines: 80,
);
}),
),
));
controller.patternController.text = 'target';
controller.showSearchOverlay(hostContext!, top: 0, right: 0);
await tester.pump();
await tester.pumpAndSettle();
controller.moveNext();
await tester.pump();
expect(controller.currentMatchIndex.value, 1);
await _disposeController(tester, controller);
});
});
}
Future<void> _disposeController(WidgetTester tester, SearchTextController controller) async {
controller.closeSearch();
await tester.pumpWidget(const SizedBox.shrink());
await tester.pump();
controller.dispose();
}