Akiba So
b359000991
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strokeBounds (tight AABB over normalized points, null for empty, zero-size for a single point), strokesBounds (union), and strokeIntersects (does a stroke's box overlap a viewport rect — touching edges count). Broad-phase primitive for the infinite board: skip painting/erasing/hit-testing strokes off-screen (R1 perf), and a cheap pre-filter before the exact per-point eraser test. Pure geometry over EditorStroke; fully unit-tested. flutter analyze lib/editor clean; 191/191 tests (+10). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
98 lines
2.5 KiB
Dart
98 lines
2.5 KiB
Dart
// Tests for stroke spatial bounds + broad-phase visibility (F7 board culling).
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import 'dart:ui' show Rect;
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import 'package:flutter_test/flutter_test.dart';
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import 'package:badnote/editor/engine/stroke_model.dart';
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import 'package:badnote/editor/engine/stroke_bounds.dart';
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EditorStroke _stroke(List<List<double>> pts) => EditorStroke.create(
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id: 's',
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points: [for (final p in pts) EditorPoint(x: p[0], y: p[1])],
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);
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void main() {
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test('strokeBounds is the tight box over points', () {
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final b = strokeBounds(_stroke([
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[0.1, 0.2],
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[0.5, 0.1],
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[0.3, 0.6],
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]))!;
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expect(b.left, closeTo(0.1, 1e-9));
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expect(b.top, closeTo(0.1, 1e-9));
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expect(b.right, closeTo(0.5, 1e-9));
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expect(b.bottom, closeTo(0.6, 1e-9));
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});
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test('empty stroke → null', () {
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expect(strokeBounds(_stroke([])), isNull);
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});
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test('single point → zero-size rect at that point', () {
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final b = strokeBounds(_stroke([
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[0.4, 0.7],
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]))!;
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expect(b.width, 0);
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expect(b.height, 0);
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expect(b.left, closeTo(0.4, 1e-9));
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expect(b.top, closeTo(0.7, 1e-9));
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});
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test('strokesBounds is the union; skips empty strokes', () {
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final b = strokesBounds([
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_stroke([
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[0.1, 0.1],
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[0.2, 0.2],
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]),
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_stroke([]), // skipped
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_stroke([
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[0.8, 0.7],
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]),
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])!;
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expect(b.left, closeTo(0.1, 1e-9));
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expect(b.top, closeTo(0.1, 1e-9));
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expect(b.right, closeTo(0.8, 1e-9));
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expect(b.bottom, closeTo(0.7, 1e-9));
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});
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test('strokesBounds of all-empty → null', () {
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expect(strokesBounds([_stroke([]), _stroke([])]), isNull);
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});
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group('strokeIntersects (broad-phase)', () {
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final view = const Rect.fromLTRB(0.0, 0.0, 0.5, 0.5);
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test('inside the viewport intersects', () {
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expect(strokeIntersects(_stroke([
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[0.1, 0.1],
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[0.2, 0.2],
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]), view), isTrue);
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});
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test('fully outside does NOT intersect', () {
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expect(strokeIntersects(_stroke([
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[0.8, 0.8],
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[0.9, 0.9],
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]), view), isFalse);
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});
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test('partial overlap intersects', () {
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expect(strokeIntersects(_stroke([
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[0.4, 0.4],
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[0.7, 0.7],
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]), view), isTrue);
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});
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test('touching edge counts as intersecting', () {
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expect(strokeIntersects(_stroke([
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[0.5, 0.5],
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]), view), isTrue);
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});
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test('empty stroke is never visible', () {
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expect(strokeIntersects(_stroke([]), view), isFalse);
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});
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});
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}
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