fix(plex): repair alpha jump bar

2026-05-08 05:36:39 +02:00
parent 92014404f5
commit f07feaaa52
7 changed files with 263 additions and 83 deletions
@@ -0,0 +1,39 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:plezy/media/library_first_character.dart';
+import 'package:plezy/screens/libraries/alpha_jump_bar.dart';
+
+void main() {
+  testWidgets('Enter jumps to the highlighted letter', (tester) async {
+    final focusNode = FocusNode(debugLabel: 'test_alpha_jump_bar');
+    addTearDown(focusNode.dispose);
+
+    int? jumpedTo;
+    await tester.pumpWidget(
+      MaterialApp(
+        home: Scaffold(
+          body: SizedBox(
+            height: 300,
+            child: AlphaJumpBar(
+              firstCharacters: const [
+                LibraryFirstCharacter(key: 'A', title: 'A', size: 3),
+                LibraryFirstCharacter(key: 'B', title: 'B', size: 4),
+                LibraryFirstCharacter(key: 'C', title: 'C', size: 2),
+              ],
+              currentLetter: 'B',
+              focusNode: focusNode,
+              onJump: (index) => jumpedTo = index,
+            ),
+          ),
+        ),
+      ),
+    );
+
+    focusNode.requestFocus();
+    await tester.pump();
+    await tester.sendKeyEvent(LogicalKeyboardKey.enter);
+
+    expect(jumpedTo, 3);
+  });
+}
@@ -0,0 +1,28 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:plezy/screens/libraries/library_alpha_scroll_metrics.dart';
+
+void main() {
+  test('maps scroll offsets to item indices by row and column count', () {
+    const metrics = LibraryAlphaScrollMetrics(columnCount: 4, rowHeight: 100, itemWidth: 150, itemHeight: 90);
+
+    expect(metrics.itemIndexFromScrollOffset(0, contentStartOffset: 50, totalSize: 40), 0);
+    expect(metrics.itemIndexFromScrollOffset(149, contentStartOffset: 50, totalSize: 40), 0);
+    expect(metrics.itemIndexFromScrollOffset(150, contentStartOffset: 50, totalSize: 40), 4);
+    expect(metrics.itemIndexFromScrollOffset(1050, contentStartOffset: 50, totalSize: 40), 39);
+  });
+
+  test('maps item indices back to scroll offsets', () {
+    const metrics = LibraryAlphaScrollMetrics(columnCount: 4, rowHeight: 100, itemWidth: 150, itemHeight: 90);
+
+    expect(metrics.scrollOffsetForItemIndex(0, contentStartOffset: 50), 50);
+    expect(metrics.scrollOffsetForItemIndex(3, contentStartOffset: 50), 50);
+    expect(metrics.scrollOffsetForItemIndex(4, contentStartOffset: 50), 150);
+    expect(metrics.scrollOffsetForItemIndex(9, contentStartOffset: 50), 250);
+  });
+
+  test('counts visible items using one extra trailing row', () {
+    const metrics = LibraryAlphaScrollMetrics(columnCount: 3, rowHeight: 100, itemWidth: 150, itemHeight: 90);
+
+    expect(metrics.visibleItemCount(250), 12);
+  });
+}