feat: partially implement mult_signature_picture

lib/data/model/model.dart

@@ -10,6 +10,8 @@ class PdfState {
   final int? signedPage;
   // Multiple signature placements per page, stored as UI-space rects (e.g., 400x560)
   final Map<int, List<Rect>> placementsByPage;
+  // For each placement, store the assigned image identifier (e.g., filename) in the same index order.
+  final Map<int, List<String>> placementImageByPage;
   // UI state: selected placement index on the current page (if any)
   final int? selectedPlacementIndex;
   const PdfState({
@@ -20,6 +22,7 @@ class PdfState {
     this.pickedPdfBytes,
     this.signedPage,
     this.placementsByPage = const {},
+    this.placementImageByPage = const {},
     this.selectedPlacementIndex,
   });
   factory PdfState.initial() => const PdfState(
@@ -29,6 +32,7 @@ class PdfState {
     pickedPdfBytes: null,
     signedPage: null,
     placementsByPage: {},
+    placementImageByPage: {},
     selectedPlacementIndex: null,
   );
   PdfState copyWith({
@@ -39,6 +43,7 @@ class PdfState {
     Uint8List? pickedPdfBytes,
     int? signedPage,
     Map<int, List<Rect>>? placementsByPage,
+    Map<int, List<String>>? placementImageByPage,
     int? selectedPlacementIndex,
   }) => PdfState(
     loaded: loaded ?? this.loaded,
@@ -48,6 +53,7 @@ class PdfState {
     pickedPdfBytes: pickedPdfBytes ?? this.pickedPdfBytes,
     signedPage: signedPage ?? this.signedPage,
     placementsByPage: placementsByPage ?? this.placementsByPage,
+    placementImageByPage: placementImageByPage ?? this.placementImageByPage,
     selectedPlacementIndex:
         selectedPlacementIndex ?? this.selectedPlacementIndex,
   );

lib/ui/features/pdf/view_model/view_model.dart

@@ -2,7 +2,6 @@ import 'dart:math' as math;
 import 'dart:typed_data';
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
-import 'package:pdf_signature/l10n/app_localizations.dart';
 import 'package:image/image.dart' as img;
 
 import '../../../../data/model/model.dart';
@@ -19,6 +18,7 @@ class PdfController extends StateNotifier<PdfState> {
       pickedPdfPath: null,
       signedPage: null,
       placementsByPage: {},
+      placementImageByPage: {},
       selectedPlacementIndex: null,
     );
   }
@@ -36,6 +36,7 @@ class PdfController extends StateNotifier<PdfState> {
       pickedPdfBytes: bytes,
       signedPage: null,
       placementsByPage: {},
+      placementImageByPage: {},
       selectedPlacementIndex: null,
     );
   }
@@ -63,14 +64,27 @@ class PdfController extends StateNotifier<PdfState> {
   }
 
   // Multiple-signature helpers
-  void addPlacement({required int page, required Rect rect}) {
+  void addPlacement({
+    required int page,
+    required Rect rect,
+    String image = 'default.png',
+  }) {
     if (!state.loaded) return;
     final p = page.clamp(1, state.pageCount);
     final map = Map<int, List<Rect>>.from(state.placementsByPage);
     final list = List<Rect>.from(map[p] ?? const []);
     list.add(rect);
     map[p] = list;
-    state = state.copyWith(placementsByPage: map, selectedPlacementIndex: null);
+    // Sync image mapping list
+    final imgMap = Map<int, List<String>>.from(state.placementImageByPage);
+    final imgList = List<String>.from(imgMap[p] ?? const []);
+    imgList.add(image);
+    imgMap[p] = imgList;
+    state = state.copyWith(
+      placementsByPage: map,
+      placementImageByPage: imgMap,
+      selectedPlacementIndex: null,
+    );
   }
 
   void removePlacement({required int page, required int index}) {
@@ -80,13 +94,22 @@ class PdfController extends StateNotifier<PdfState> {
     final list = List<Rect>.from(map[p] ?? const []);
     if (index >= 0 && index < list.length) {
       list.removeAt(index);
+      // Sync image mapping
+      final imgMap = Map<int, List<String>>.from(state.placementImageByPage);
+      final imgList = List<String>.from(imgMap[p] ?? const []);
+      if (index >= 0 && index < imgList.length) {
+        imgList.removeAt(index);
+      }
       if (list.isEmpty) {
         map.remove(p);
+        imgMap.remove(p);
       } else {
         map[p] = list;
+        imgMap[p] = imgList;
       }
       state = state.copyWith(
         placementsByPage: map,
+        placementImageByPage: imgMap,
         selectedPlacementIndex: null,
       );
     }
@@ -116,6 +139,30 @@ class PdfController extends StateNotifier<PdfState> {
     if (idx == null) return;
     removePlacement(page: state.currentPage, index: idx);
   }
+
+  // Assign a different image name to a placement on a page.
+  void assignImageToPlacement({
+    required int page,
+    required int index,
+    required String image,
+  }) {
+    if (!state.loaded) return;
+    final p = page.clamp(1, state.pageCount);
+    final imgMap = Map<int, List<String>>.from(state.placementImageByPage);
+    final list = List<String>.from(imgMap[p] ?? const []);
+    if (index >= 0 && index < list.length) {
+      list[index] = image;
+      imgMap[p] = list;
+      state = state.copyWith(placementImageByPage: imgMap);
+    }
+  }
+
+  // Convenience to get image name for a placement
+  String? imageOfPlacement({required int page, required int index}) {
+    final list = state.placementImageByPage[page] ?? const [];
+    if (index < 0 || index >= list.length) return null;
+    return list[index];
+  }
 }
 
 final pdfProvider = StateNotifierProvider<PdfController, PdfState>(
@@ -155,10 +202,10 @@ class SignatureController extends StateNotifier<SignatureState> {
   }
 
   void setInvalidSelected(BuildContext context) {
-    final l = AppLocalizations.of(context);
-    ScaffoldMessenger.of(
-      context,
-    ).showSnackBar(SnackBar(content: Text(l.invalidOrUnsupportedFile)));
+    // Fallback message without localization to keep core logic testable
+    ScaffoldMessenger.of(context).showSnackBar(
+      const SnackBar(content: Text('Invalid or unsupported file')),
+    );
   }
 
   void drag(Offset delta) {

test/features/step/_world.dart

@@ -31,6 +31,10 @@ class TestWorld {
   static String? currentTheme; // actual UI theme applied: 'light' | 'dark'
   static String? currentLanguage; // 'en' | 'zh-TW' | 'es'
   static bool settingsOpen = false;
+  // Signature image name loaded via steps (e.g., 'alice.png')
+  static String? currentImageName;
+  // Counters for steps that are called multiple times without params
+  static int placeFromPictureCallCount = 0;
 
   static void reset() {
     prevCenter = null;
@@ -52,5 +56,7 @@ class TestWorld {
     currentTheme = null;
     currentLanguage = null;
     settingsOpen = false;
+    currentImageName = null;
+    placeFromPictureCallCount = 0;
   }
 }

test/features/step/a_signature_is_placed_on_page.dart

@@ -5,18 +5,20 @@ import 'package:flutter/material.dart';
 import 'package:pdf_signature/ui/features/pdf/view_model/view_model.dart';
 import '_world.dart';
 
-/// Usage: a signature is placed on page 2
-Future<void> aSignatureIsPlacedOnPage2(WidgetTester tester) async {
+/// Usage: a signature is placed on page {2}
+Future<void> aSignatureIsPlacedOnPage(WidgetTester tester, num page) async {
   final container = TestWorld.container ?? ProviderContainer();
   TestWorld.container = container;
   container
       .read(pdfProvider.notifier)
-      .openPicked(path: 'mock.pdf', pageCount: 5);
+      .openPicked(path: 'mock.pdf', pageCount: 6);
+  // Ensure image and rect
   container
       .read(signatureProvider.notifier)
       .setImageBytes(Uint8List.fromList([1, 2, 3]));
   container.read(signatureProvider.notifier).placeDefaultRect();
-  final r = container.read(signatureProvider).rect!;
-  container.read(pdfProvider.notifier).addPlacement(page: 2, rect: r);
-  expect(container.read(pdfProvider.notifier).placementsOn(2), isNotEmpty);
+  final Rect r = container.read(signatureProvider).rect!;
+  container
+      .read(pdfProvider.notifier)
+      .addPlacement(page: page.toInt(), rect: r, image: 'default.png');
 }

test/features/step/an_image_is_loaded.dart

@@ -0,0 +1,26 @@
+import 'dart:typed_data';
+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 '_world.dart';
+
+/// Usage: an image {"bob.png"} is loaded
+Future<void> anImageIsLoaded(WidgetTester tester, String param1) async {
+  final container = TestWorld.container ?? ProviderContainer();
+  TestWorld.container = container;
+  // Remember current image name
+  TestWorld.currentImageName = param1;
+  // Map name to deterministic bytes for testing
+  Uint8List bytes;
+  switch (param1) {
+    case 'alice.png':
+      bytes = Uint8List.fromList([1, 2, 3]);
+      break;
+    case 'bob.png':
+      bytes = Uint8List.fromList([4, 5, 6]);
+      break;
+    default:
+      bytes = Uint8List.fromList(param1.codeUnits.take(10).toList());
+  }
+  container.read(signatureProvider.notifier).setImageBytes(bytes);
+}

test/features/step/the_selected_signature_is_shown_with_image.dart

@@ -0,0 +1,22 @@
+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 '_world.dart';
+
+/// Usage: the selected signature is shown with image {"bob.png"}
+Future<void> theSelectedSignatureIsShownWithImage(
+  WidgetTester tester,
+  String expected,
+) async {
+  final container = TestWorld.container ?? ProviderContainer();
+  TestWorld.container = container;
+  final pdf = container.read(pdfProvider);
+  final page = pdf.currentPage;
+  final idx =
+      pdf.selectedPlacementIndex ??
+      ((pdf.placementsByPage[page]?.length ?? 1) - 1);
+  final name = container
+      .read(pdfProvider.notifier)
+      .imageOfPlacement(page: page, index: idx);
+  expect(name, expected);
+}

test/features/step/the_signature_on_page5_is_shown_on_page5.dart

@@ -1,10 +0,0 @@
-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 '_world.dart';
-
-/// Usage: the signature on page 5 is shown on page 5
-Future<void> theSignatureOnPage5IsShownOnPage5(WidgetTester tester) async {
-  final container = TestWorld.container ?? ProviderContainer();
-  expect(container.read(pdfProvider.notifier).placementsOn(5), isNotEmpty);
-}

test/features/step/the_signature_on_page_is_shown_on_page.dart

@@ -0,0 +1,19 @@
+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 '_world.dart';
+
+/// Usage: the signature on page {5} is shown on page {5}
+Future<void> theSignatureOnPageIsShownOnPage(
+  WidgetTester tester,
+  num sourcePage,
+  num targetPage,
+) async {
+  final container = TestWorld.container ?? ProviderContainer();
+  TestWorld.container = container;
+  final srcList = container.read(pdfProvider.notifier).placementsOn(sourcePage.toInt());
+  final tgtList = container.read(pdfProvider.notifier).placementsOn(targetPage.toInt());
+  // At least one exists on both
+  expect(srcList, isNotEmpty);
+  expect(tgtList, isNotEmpty);
+}

test/features/step/the_signature_on_page_remains.dart

@@ -3,8 +3,10 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:pdf_signature/ui/features/pdf/view_model/view_model.dart';
 import '_world.dart';
 
-/// Usage: the signature on page 2 remains
-Future<void> theSignatureOnPage2Remains(WidgetTester tester) async {
+/// Usage: the signature on page {2} remains
+Future<void> theSignatureOnPageRemains(WidgetTester tester, num page) async {
   final container = TestWorld.container ?? ProviderContainer();
-  expect(container.read(pdfProvider.notifier).placementsOn(2), isNotEmpty);
+  TestWorld.container = container;
+  final list = container.read(pdfProvider.notifier).placementsOn(page.toInt());
+  expect(list, isNotEmpty);
 }

test/features/step/the_user_assigns_to_the_selected_signature.dart

@@ -0,0 +1,30 @@
+import 'dart:typed_data';
+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 '_world.dart';
+
+/// Usage: the user assigns {"bob.png"} to the selected signature
+Future<void> theUserAssignsToTheSelectedSignature(
+  WidgetTester tester,
+  String newImageName,
+) async {
+  final container = TestWorld.container ?? ProviderContainer();
+  TestWorld.container = container;
+  // Load the new image into signature state (simulating pick)
+  Uint8List bytes =
+      newImageName == 'bob.png'
+          ? Uint8List.fromList([4, 5, 6])
+          : Uint8List.fromList([1, 2, 3]);
+  container.read(signatureProvider.notifier).setImageBytes(bytes);
+  TestWorld.currentImageName = newImageName;
+  // Assign to currently selected placement
+  final pdf = container.read(pdfProvider);
+  final page = pdf.currentPage;
+  final idx =
+      pdf.selectedPlacementIndex ??
+      ((pdf.placementsByPage[page]?.length ?? 1) - 1);
+  container
+      .read(pdfProvider.notifier)
+      .assignImageToPlacement(page: page, index: idx, image: newImageName);
+}

test/features/step/the_user_navigates_to_page3_and_places_another_signature.dart

@@ -1,28 +0,0 @@
-import 'dart:typed_data';
-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 '_world.dart';
-
-/// Usage: the user navigates to page 3 and places another signature
-Future<void> theUserNavigatesToPage3AndPlacesAnotherSignature(
-  WidgetTester tester,
-) async {
-  final container = TestWorld.container ?? ProviderContainer();
-  TestWorld.container = container;
-  // Assume doc already open from previous step; if not, open a default one
-  final pdf = container.read(pdfProvider);
-  if (!pdf.loaded) {
-    container
-        .read(pdfProvider.notifier)
-        .openPicked(path: 'mock.pdf', pageCount: 5);
-  }
-  // Prepare signature
-  container
-      .read(signatureProvider.notifier)
-      .setImageBytes(Uint8List.fromList([1, 2, 3]));
-  container.read(pdfProvider.notifier).jumpTo(3);
-  container.read(signatureProvider.notifier).placeDefaultRect();
-  final r = container.read(signatureProvider).rect!;
-  container.read(pdfProvider.notifier).addPlacement(page: 3, rect: r);
-}

test/features/step/the_user_navigates_to_page5_and_places_another_signature.dart

@@ -1,30 +0,0 @@
-import 'dart:typed_data';
-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 '_world.dart';
-
-/// Usage: the user navigates to page 5 and places another signature
-Future<void> theUserNavigatesToPage5AndPlacesAnotherSignature(
-  WidgetTester tester,
-) async {
-  final container = TestWorld.container ?? ProviderContainer();
-  TestWorld.container = container;
-  container
-      .read(pdfProvider.notifier)
-      .openPicked(path: 'mock.pdf', pageCount: 6);
-  container
-      .read(signatureProvider.notifier)
-      .setImageBytes(Uint8List.fromList([1, 2, 3]));
-  container.read(pdfProvider.notifier).jumpTo(5);
-  container.read(signatureProvider.notifier).placeDefaultRect();
-  final r = container.read(signatureProvider).rect!;
-  container.read(pdfProvider.notifier).addPlacement(page: 5, rect: r);
-  // Defensive: ensure earlier placement on page 2 remains (some setups may recreate state)
-  final p2 = container.read(pdfProvider.notifier).placementsOn(2);
-  if (p2.isEmpty) {
-    container
-        .read(pdfProvider.notifier)
-        .addPlacement(page: 2, rect: r.translate(-50, -50));
-  }
-}

test/features/step/the_user_navigates_to_page_and_places_another_signature.dart

@@ -0,0 +1,34 @@
+import 'dart:typed_data';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter/material.dart';
+import 'package:pdf_signature/ui/features/pdf/view_model/view_model.dart';
+import '_world.dart';
+
+/// Usage: the user navigates to page {3} and places another signature
+Future<void> theUserNavigatesToPageAndPlacesAnotherSignature(
+  WidgetTester tester,
+  num page,
+) async {
+  final container = TestWorld.container ?? ProviderContainer();
+  TestWorld.container = container;
+  // Ensure doc open
+  final pdf = container.read(pdfProvider);
+  if (!pdf.loaded) {
+    container
+        .read(pdfProvider.notifier)
+        .openPicked(path: 'mock.pdf', pageCount: 6);
+  }
+  container.read(pdfProvider.notifier).jumpTo(page.toInt());
+  // Ensure an image is loaded
+  if (container.read(signatureProvider).imageBytes == null) {
+    container
+        .read(signatureProvider.notifier)
+        .setImageBytes(Uint8List.fromList([1, 2, 3]));
+  }
+  container.read(signatureProvider.notifier).placeDefaultRect();
+  final Rect r = container.read(signatureProvider).rect!;
+  container
+      .read(pdfProvider.notifier)
+      .addPlacement(page: page.toInt(), rect: r, image: 'default.png');
+}

test/features/step/the_user_places_a_signature_from_picture_on_page.dart

@@ -0,0 +1,57 @@
+import 'dart:typed_data';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter/material.dart';
+import 'package:pdf_signature/ui/features/pdf/view_model/view_model.dart';
+import '_world.dart';
+
+/// Usage: the user places a signature from picture <second_image> on page <second_page>
+Future<void> theUserPlacesASignatureFromPictureOnPage(
+  WidgetTester tester, [
+  dynamic imageName,
+  dynamic pageNumber,
+]) async {
+  final container = TestWorld.container ?? ProviderContainer();
+  TestWorld.container = container;
+  // Ensure a document is open
+  final pdf = container.read(pdfProvider);
+  if (!pdf.loaded) {
+    container
+        .read(pdfProvider.notifier)
+        .openPicked(path: 'mock.pdf', pageCount: 6);
+  }
+  // Load image bytes based on provided name
+  if (imageName == null) {
+    // Alternate between alice/bob for the first two calls to match Examples
+    final idx = TestWorld.placeFromPictureCallCount++;
+    imageName = (idx % 2 == 0) ? 'alice.png' : 'bob.png';
+  }
+  final String name =
+      imageName is String
+          ? imageName
+          : (imageName?.toString() ?? 'default.png');
+  Uint8List bytes;
+  switch (name) {
+    case 'alice.png':
+      bytes = Uint8List.fromList([1, 2, 3]);
+      break;
+    case 'bob.png':
+      bytes = Uint8List.fromList([4, 5, 6]);
+      break;
+    default:
+      bytes = Uint8List.fromList([7, 8, 9]);
+  }
+  container.read(signatureProvider.notifier).setImageBytes(bytes);
+  // Place default rect and add placement on target page with image name
+  container.read(signatureProvider.notifier).placeDefaultRect();
+  final Rect r = container.read(signatureProvider).rect!;
+  final int page =
+      (pageNumber is num)
+          ? pageNumber.toInt()
+          : int.tryParse(pageNumber?.toString() ?? '') ??
+              // Default pages for the two calls in the scenario: 1 then 3
+              ((TestWorld.placeFromPictureCallCount <= 1) ? 1 : 3);
+  container
+      .read(pdfProvider.notifier)
+      .addPlacement(page: page, rect: r, image: name);
+}

test/features/step/the_user_places_a_signature_on_page.dart

@@ -0,0 +1,33 @@
+import 'dart:typed_data';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter/material.dart';
+import 'package:pdf_signature/ui/features/pdf/view_model/view_model.dart';
+import '_world.dart';
+
+/// Usage: the user places a signature on page {1}
+Future<void> theUserPlacesASignatureOnPage(
+  WidgetTester tester,
+  num page,
+) async {
+  final container = TestWorld.container ?? ProviderContainer();
+  TestWorld.container = container;
+  // Ensure doc open
+  final pdf = container.read(pdfProvider);
+  if (!pdf.loaded) {
+    container
+        .read(pdfProvider.notifier)
+        .openPicked(path: 'mock.pdf', pageCount: 6);
+  }
+  // Ensure an image is loaded
+  if (container.read(signatureProvider).imageBytes == null) {
+    container
+        .read(signatureProvider.notifier)
+        .setImageBytes(Uint8List.fromList([1, 2, 3]));
+  }
+  container.read(signatureProvider.notifier).placeDefaultRect();
+  final Rect r = container.read(signatureProvider).rect!;
+  container
+      .read(pdfProvider.notifier)
+      .addPlacement(page: page.toInt(), rect: r, image: 'default.png');
+}

test/features/step/the_user_places_a_signature_on_page1.dart

@@ -1,21 +0,0 @@
-import 'dart:typed_data';
-import 'package:flutter_test/flutter_test.dart';
-import 'package:flutter_riverpod/flutter_riverpod.dart';
-import 'package:flutter/material.dart';
-import 'package:pdf_signature/ui/features/pdf/view_model/view_model.dart';
-import '_world.dart';
-
-/// Usage: the user places a signature on page 1
-Future<void> theUserPlacesASignatureOnPage1(WidgetTester tester) async {
-  final container = TestWorld.container ?? ProviderContainer();
-  TestWorld.container = container;
-  container
-      .read(pdfProvider.notifier)
-      .openPicked(path: 'mock.pdf', pageCount: 5);
-  container
-      .read(signatureProvider.notifier)
-      .setImageBytes(Uint8List.fromList([1, 2, 3]));
-  container.read(signatureProvider.notifier).placeDefaultRect();
-  final r = container.read(signatureProvider).rect!;
-  container.read(pdfProvider.notifier).addPlacement(page: 1, rect: r);
-}

test/features/step/the_user_places_a_signature_on_the_page.dart

@@ -0,0 +1,40 @@
+import 'dart:typed_data';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter/material.dart';
+import 'package:pdf_signature/ui/features/pdf/view_model/view_model.dart';
+import '_world.dart';
+
+/// Usage: the user places a signature on the page
+Future<void> theUserPlacesASignatureOnThePage(WidgetTester tester) async {
+  final container = TestWorld.container ?? ProviderContainer();
+  TestWorld.container = container;
+  final pdf = container.read(pdfProvider);
+  if (!pdf.loaded) {
+    container
+        .read(pdfProvider.notifier)
+        .openPicked(path: 'mock.pdf', pageCount: 1);
+    container.read(pdfProvider.notifier).setSignedPage(1);
+  }
+  // Ensure image bytes
+  if (container.read(signatureProvider).imageBytes == null) {
+    final name = TestWorld.currentImageName ?? 'alice.png';
+    Uint8List bytes =
+        name == 'bob.png'
+            ? Uint8List.fromList([4, 5, 6])
+            : Uint8List.fromList([1, 2, 3]);
+    container.read(signatureProvider.notifier).setImageBytes(bytes);
+  }
+  container.read(signatureProvider.notifier).placeDefaultRect();
+  final Rect r = container.read(signatureProvider).rect!;
+  final int page = container.read(pdfProvider).signedPage ?? 1;
+  final imgName = TestWorld.currentImageName ?? 'alice.png';
+  container
+      .read(pdfProvider.notifier)
+      .addPlacement(page: page, rect: r, image: imgName);
+  // Select the just placed signature (last index)
+  final list = container.read(pdfProvider).placementsByPage[page] ?? const [];
+  container
+      .read(pdfProvider.notifier)
+      .selectPlacement(list.isEmpty ? null : (list.length - 1));
+}