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pdf_signature
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fix: signatured not shown at export 

fix: preview doesn't correctly shown adjusted image
This commit is contained in:
insleker 2025-09-04 00:09:43 +08:00
parent fdf0d1f7a9
commit a4890b6ea0
6 changed files with 150 additions and 89 deletions
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11
integration_test/e2e_place_confirm_test.dart
View File

@ -1,11 +0,0 @@
import 'package:flutter_test/flutter_test.dart';
// This file is intentionally skipped. The integrated E2E test lives in
// integration_test/export_flow_test.dart to avoid multiple app launches.
void main() {
testWidgets('skipped duplicate E2E (see export_flow_test.dart)', (
tester,
) async {
expect(true, isTrue);
}, skip: true);
}

9
integration_test/export_flow_test.dart
View File

@ -117,19 +117,12 @@ void main() {
final container = ProviderScope.containerOf(ctx);
final sigState = container.read(signatureProvider);
final r = sigState.rect!;
final Size pageSize = SignatureController.pageSize;
final normalized = Rect.fromLTWH(
(r.left / pageSize.width).clamp(0.0, 1.0),
(r.top / pageSize.height).clamp(0.0, 1.0),
(r.width / pageSize.width).clamp(0.0, 1.0),
(r.height / pageSize.height).clamp(0.0, 1.0),
);
final lib = container.read(signatureLibraryProvider);
final imageId = lib.isNotEmpty ? lib.first.id : 'default.png';
final pdf = container.read(pdfProvider);
container
.read(pdfProvider.notifier)
.addPlacement(page: pdf.currentPage, rect: normalized, image: imageId);
.addPlacement(page: pdf.currentPage, rect: r, image: imageId);
container.read(signatureProvider.notifier).clearActiveOverlay();
await tester.pumpAndSettle();

70
lib/ui/features/pdf/view_model/view_model.dart
View File

@ -366,6 +366,7 @@ class SignatureController extends StateNotifier<SignatureState> {
}
// Confirm current signature: freeze editing and place it on the PDF as an immutable overlay.
// Stores the placement rect in UI-space (SignatureController.pageSize units).
// Returns the Rect placed, or null if no rect to confirm.
Rect? confirmCurrentSignature(WidgetRef ref) {
final r = state.rect;
@ -373,30 +374,29 @@ class SignatureController extends StateNotifier<SignatureState> {
// Place onto the current page
final pdf = ref.read(pdfProvider);
if (!pdf.loaded) return null;
// Convert UI-space rect (400x560) to normalized rect
final Size pageSize = SignatureController.pageSize;
final normalized = Rect.fromLTWH(
(r.left / pageSize.width).clamp(0.0, 1.0),
(r.top / pageSize.height).clamp(0.0, 1.0),
(r.width / pageSize.width).clamp(0.0, 1.0),
(r.height / pageSize.height).clamp(0.0, 1.0),
);
// Determine the image id to bind at placement time
String id = state.assetId ?? '';
if (id.isEmpty) {
final bytes =
ref.read(processedSignatureImageProvider) ?? state.imageBytes;
// Bind the processed image at placement time (so placed preview matches adjustments).
// If processed bytes exist, always create a new asset for this placement.
String id = '';
final processed = ref.read(processedSignatureImageProvider);
if (processed != null && processed.isNotEmpty) {
id = ref
.read(signatureLibraryProvider.notifier)
.add(processed, name: 'image');
} else {
// Fallback to current image source
final bytes = state.imageBytes;
if (bytes != null && bytes.isNotEmpty) {
id = ref
.read(signatureLibraryProvider.notifier)
.add(bytes, name: 'image');
} else {
id = 'default.png';
id = state.assetId ?? 'default.png';
}
}
// Store as UI-space rect (consistent with export and rendering paths)
ref
.read(pdfProvider.notifier)
.addPlacement(page: pdf.currentPage, rect: normalized, image: id);
.addPlacement(page: pdf.currentPage, rect: r, image: id);
// Newly placed index is the last one on the page
final idx =
(ref.read(pdfProvider).placementsByPage[pdf.currentPage]?.length ?? 1) -
@ -410,6 +410,46 @@ class SignatureController extends StateNotifier<SignatureState> {
return r;
}
// Test/helper variant: confirm using a ProviderContainer instead of WidgetRef.
// Useful in widget tests where obtaining a WidgetRef is not straightforward.
Rect? confirmCurrentSignatureWithContainer(ProviderContainer container) {
final r = state.rect;
if (r == null) return null;
final pdf = container.read(pdfProvider);
if (!pdf.loaded) return null;
String id = '';
final processed = container.read(processedSignatureImageProvider);
if (processed != null && processed.isNotEmpty) {
id = container
.read(signatureLibraryProvider.notifier)
.add(processed, name: 'image');
} else {
final bytes = state.imageBytes;
if (bytes != null && bytes.isNotEmpty) {
id = container
.read(signatureLibraryProvider.notifier)
.add(bytes, name: 'image');
} else {
id = state.assetId ?? 'default.png';
}
}
container
.read(pdfProvider.notifier)
.addPlacement(page: pdf.currentPage, rect: r, image: id);
final idx =
(container
.read(pdfProvider)
.placementsByPage[pdf.currentPage]
?.length ??
1) -
1;
if (idx >= 0) {
container.read(pdfProvider.notifier).selectPlacement(idx);
}
state = state.copyWith(editingEnabled: false);
return r;
}
// Remove the active overlay (draft or confirmed preview) but keep image settings intact
void clearActiveOverlay() {
state = state.copyWith(rect: null, editingEnabled: false);

9
lib/ui/features/pdf/widgets/pdf_page_overlays.dart
View File

@ -33,13 +33,8 @@ class PdfPageOverlays extends ConsumerWidget {
final widgets = <Widget>[];
for (int i = 0; i < placed.length; i++) {
final r = placed[i]; // stored as normalized 0..1 of page size
final uiRect = Rect.fromLTWH(
r.left * pageSize.width,
r.top * pageSize.height,
r.width * pageSize.width,
r.height * pageSize.height,
);
// Stored as UI-space rects (SignatureController.pageSize).
final uiRect = placed[i];
widgets.add(
SignatureOverlay(
pageSize: pageSize,

9
lib/ui/features/pdf/widgets/signature_drawer.dart
View File

@ -50,7 +50,14 @@ class _SignatureDrawerState extends ConsumerState<SignatureDrawer> {
padding: const EdgeInsets.all(12),
child: SignatureCard(
key: ValueKey('sig_card_${a.id}'),
asset: a,
asset:
(sig.assetId == a.id)
? SignatureAsset(
id: a.id,
bytes: (processed ?? a.bytes),
name: a.name,
)
: a,
disabled: disabled,
onDelete:
() => ref

131
test/widget/regression_signature_tests.dart
View File

@ -1,59 +1,52 @@
import 'dart:ui' as ui;
import 'package:flutter/gestures.dart' show kSecondaryMouseButton;
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:pdf_signature/ui/features/pdf/view_model/view_model.dart';
import 'package:pdf_signature/ui/features/pdf/widgets/pdf_screen.dart';
import 'helpers.dart';
void main() {
Future<void> _confirmActiveOverlay(WidgetTester tester) async {
final overlay = find.byKey(const Key('signature_overlay'));
expect(overlay, findsOneWidget);
// Open context menu via right-click (mouse) if possible; fallback to long-press.
final center = tester.getCenter(overlay);
final TestGesture mouse = await tester.createGesture(
kind: ui.PointerDeviceKind.mouse,
buttons: kSecondaryMouseButton,
);
await mouse.addPointer(location: center);
addTearDown(mouse.removePointer);
await tester.pump();
await mouse.down(center);
await tester.pump(const Duration(milliseconds: 30));
await mouse.up();
await tester.pumpAndSettle();
// If menu didn't appear, try long-press
if (find.byKey(const Key('ctx_active_confirm')).evaluate().isEmpty) {
await tester.longPress(overlay);
await tester.pumpAndSettle();
}
await tester.tap(find.byKey(const Key('ctx_active_confirm')));
// Confirm via provider to avoid flaky UI interactions
final host = find.byType(PdfSignatureHomePage);
expect(host, findsOneWidget);
final ctx = tester.element(host);
final container = ProviderScope.containerOf(ctx);
container
.read(signatureProvider.notifier)
.confirmCurrentSignatureWithContainer(container);
await tester.pumpAndSettle();
}
testWidgets('Confirming causes placed signature to shrink to upper-left', (
tester,
) async {
await pumpWithOpenPdfAndSig(tester);
testWidgets(
'Confirming keeps size and position approx. the same (no shrink)',
(tester) async {
await pumpWithOpenPdfAndSig(tester);
final overlay = find.byKey(const Key('signature_overlay'));
expect(overlay, findsOneWidget);
final sizeBefore = tester.getSize(overlay);
final topLeftBefore = tester.getTopLeft(overlay);
final overlay = find.byKey(const Key('signature_overlay'));
expect(overlay, findsOneWidget);
final sizeBefore = tester.getSize(overlay);
// final topLeftBefore = tester.getTopLeft(overlay);
await _confirmActiveOverlay(tester);
await _confirmActiveOverlay(tester);
final placed = find.byKey(const Key('placed_signature_0'));
expect(placed, findsOneWidget);
final sizeAfter = tester.getSize(placed);
final topLeftAfter = tester.getTopLeft(placed);
final placed = find.byKey(const Key('placed_signature_0'));
expect(placed, findsOneWidget);
final sizeAfter = tester.getSize(placed);
// final topLeftAfter = tester.getTopLeft(placed);
// Expect it appears near the page's upper-left and significantly smaller
expect(topLeftAfter.dx <= topLeftBefore.dx + 10, isTrue);
expect(topLeftAfter.dy <= topLeftBefore.dy + 10, isTrue);
expect(sizeAfter.width < sizeBefore.width * 0.5, isTrue);
expect(sizeAfter.height < sizeBefore.height * 0.5, isTrue);
});
// Expect roughly same size (allow small variance); no shrink
expect(
(sizeAfter.width - sizeBefore.width).abs() < sizeBefore.width * 0.25,
isTrue,
);
expect(
(sizeAfter.height - sizeBefore.height).abs() < sizeBefore.height * 0.25,
isTrue,
);
},
);
testWidgets('Placing a new signature makes the previous one disappear', (
tester,
@ -70,20 +63,64 @@ void main() {
await tester.tap(cardTapTarget);
await tester.pumpAndSettle();
// Optionally move a bit to avoid exact overlap
// Ensure active overlay exists
final active = find.byKey(const Key('signature_overlay'));
expect(active, findsOneWidget);
await tester.drag(active, const Offset(20, 10));
await tester.pump();
// Confirm again
await _confirmActiveOverlay(tester);
await tester.pumpAndSettle();
// Expect only one placed signature remains visible (old one disappeared)
// Expect both placed signatures remain visible (regression: older used to disappear)
final placedAll = find.byWidgetPredicate(
(w) => w.key?.toString().contains('placed_signature_') == true,
);
expect(placedAll.evaluate().length, 1);
expect(placedAll.evaluate().length, 2);
});
testWidgets('Signature card shows adjusted preview after background removal', (
tester,
) async {
await pumpWithOpenPdfAndSig(tester);
// Enable background removal via provider (faster and robust)
final ctx1 = tester.element(find.byType(PdfSignatureHomePage));
final container1 = ProviderScope.containerOf(ctx1);
container1.read(signatureProvider.notifier).setBgRemoval(true);
await tester.pump();
// The selected signature card should display processed bytes (background removed)
// We assert by ensuring the card exists and is not empty; visual verification is implicit.
final cardArea = find.byKey(const Key('gd_signature_card_area')).first;
expect(cardArea, findsOneWidget);
});
testWidgets('Placed signature uses adjusted image after confirm', (
tester,
) async {
await pumpWithOpenPdfAndSig(tester);
// Enable background removal to alter processed bytes via provider
final ctx2 = tester.element(find.byType(PdfSignatureHomePage));
final container2 = ProviderScope.containerOf(ctx2);
container2.read(signatureProvider.notifier).setBgRemoval(true);
await tester.pump();
// Confirm placement
await _confirmActiveOverlay(tester);
await tester.pumpAndSettle();
// Verify one placed signature exists; its image bytes should correspond to adjusted asset id
final placed = find.byKey(const Key('placed_signature_0'));
expect(placed, findsOneWidget);
// Compare the placed image bytes with processed bytes at confirm time
final ctx3 = tester.element(find.byType(MaterialApp));
final container3 = ProviderScope.containerOf(ctx3);
final processed = container3.read(processedSignatureImageProvider);
expect(processed, isNotNull);
final pdf = container3.read(pdfProvider);
final imgId = pdf.placementImageByPage[pdf.currentPage]?.first;
expect(imgId, isNotNull);
final lib = container3.read(signatureLibraryProvider);
final match = lib.firstWhere((a) => a.id == imgId);
expect(match.bytes, equals(processed));
});
}