Home screen

2025-08-19 08:27:03 +02:00
parent e74bbcd0d6
commit 5c7d603c3e
12 changed files with 343 additions and 50 deletions
--- a/app/src/main/java/org/mydomain/myscan/MainActivity.kt
+++ b/app/src/main/java/org/mydomain/myscan/MainActivity.kt
@@ -40,6 +40,7 @@ import org.mydomain.myscan.ui.theme.MyScanTheme
 import org.mydomain.myscan.view.AboutScreen
 import org.mydomain.myscan.view.CameraScreen
 import org.mydomain.myscan.view.DocumentScreen
+import org.mydomain.myscan.view.HomeScreen
 import org.mydomain.myscan.view.LibrariesScreen
 import org.opencv.android.OpenCVLoader

@@ -61,6 +62,7 @@ class MainActivity : ComponentActivity() {
            val document by viewModel.documentUiModel.collectAsStateWithLifecycle()
            MyScanTheme {
                val navigation = Navigation(
+                    toHomeScreen = { viewModel.navigateTo(Screen.Home) },
                    toCameraScreen = { viewModel.navigateTo(Screen.Camera) },
                    toDocumentScreen = { viewModel.navigateTo(Screen.Document()) },
                    toAboutScreen = { viewModel.navigateTo(Screen.About) },
@@ -68,9 +70,18 @@ class MainActivity : ComponentActivity() {
                    back = { viewModel.navigateBack() }
                )
                when (val screen = currentScreen) {
+                    is Screen.Home -> {
+                        HomeScreen(
+                            hasCameraPermission = hasCameraPermission(this),
+                            currentDocument = document,
+                            navigation = navigation,
+                            onStartNewScan = navigation.toCameraScreen,
+                        )
+                    }
                    is Screen.Camera -> {
                        CameraScreen(
                            viewModel,
+                            navigation,
                            liveAnalysisState,
                            onImageAnalyzed = { image -> viewModel.liveAnalysis(image) },
                            onFinalizePressed = { viewModel.navigateTo(Screen.Document()) },
@@ -92,7 +103,7 @@ class MainActivity : ComponentActivity() {
                            ),
                            onStartNew = {
                                viewModel.startNewDocument()
-                                viewModel.navigateTo(Screen.Camera) },
+                                viewModel.navigateTo(Screen.Home) },
                            onDeleteImage =  { id -> viewModel.deletePage(id) }
                        )
                    }
--- a/app/src/main/java/org/mydomain/myscan/MainViewModel.kt
+++ b/app/src/main/java/org/mydomain/myscan/MainViewModel.kt
@@ -68,9 +68,9 @@ class MainViewModel(
    val liveAnalysisState: StateFlow<LiveAnalysisState> = _liveAnalysisState.asStateFlow()
    private var lastSuccessfulLiveAnalysisState: LiveAnalysisState? = null

-    private val _screenStack = MutableStateFlow<List<Screen>>(listOf(Screen.Camera))
+    private val _screenStack = MutableStateFlow<List<Screen>>(listOf(Screen.Home))
    val currentScreen: StateFlow<Screen> = _screenStack.map { it.last() }
-        .stateIn(viewModelScope, SharingStarted.Eagerly, Screen.Camera)
+        .stateIn(viewModelScope, SharingStarted.Eagerly, _screenStack.value.last())

    private val _pageIds = MutableStateFlow(imageRepository.imageIds())
    val documentUiModel: StateFlow<DocumentUiModel> =
--- a/app/src/main/java/org/mydomain/myscan/Navigation.kt
+++ b/app/src/main/java/org/mydomain/myscan/Navigation.kt
@@ -15,6 +15,7 @@
 package org.mydomain.myscan

 sealed class Screen {
+    object Home : Screen()
    object Camera : Screen()
    data class Document(val initialPage: Int = 0) : Screen()
    object About : Screen()
@@ -22,6 +23,7 @@ sealed class Screen {
 }

 data class Navigation(
+    val toHomeScreen: () -> Unit,
    val toCameraScreen: () -> Unit,
    val toDocumentScreen: () -> Unit,
    val toAboutScreen: () -> Unit,
--- a/app/src/main/java/org/mydomain/myscan/PermissionHelpers.kt
+++ b/app/src/main/java/org/mydomain/myscan/PermissionHelpers.kt
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2025 Pierre-Yves Nicolas
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version.
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+package org.mydomain.myscan
+
+import android.Manifest
+import android.content.Context
+import android.content.pm.PackageManager
+import android.widget.Toast
+import androidx.activity.compose.ManagedActivityResultLauncher
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.platform.LocalContext
+import androidx.core.content.ContextCompat
+
+fun hasCameraPermission(context: Context): Boolean {
+    val camera = Manifest.permission.CAMERA
+    return ContextCompat.checkSelfPermission(context, camera) == PackageManager.PERMISSION_GRANTED
+}
+
+@Composable
+fun rememberCameraPermissionLauncher(
+    onGranted: () -> Unit = {},
+    onDenied: () -> Unit = {}
+): ManagedActivityResultLauncher<String, Boolean> {
+    val context = LocalContext.current
+    return rememberLauncherForActivityResult (
+        ActivityResultContracts.RequestPermission()
+    ) { isGranted ->
+        if (isGranted) {
+            onGranted()
+        } else {
+            onDenied()
+            Toast.makeText(
+                context,
+                context.getString(R.string.camera_permission_denied),
+                Toast.LENGTH_SHORT
+            ).show()
+        }
+    }
+}
--- a/app/src/main/java/org/mydomain/myscan/view/Buttons.kt
+++ b/app/src/main/java/org/mydomain/myscan/view/Buttons.kt
@@ -19,7 +19,7 @@ import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.ArrowBack
-import androidx.compose.material.icons.outlined.Info
+import androidx.compose.material.icons.filled.Info
 import androidx.compose.material3.Button
 import androidx.compose.material3.FilledIconButton
 import androidx.compose.material3.Icon
@@ -38,13 +38,15 @@ import org.mydomain.myscan.R
 fun MainActionButton(
    onClick: () -> Unit,
    text: String,
-    icon: ImageVector,
+    icon: ImageVector? = null,
    modifier: Modifier = Modifier,
    iconDescription: String? = null,
    enabled: Boolean = true,
    ) {
    Button(onClick = onClick, enabled = enabled, modifier = modifier) {
-        Icon(icon, contentDescription = iconDescription)
+        icon?.let {
+            Icon(icon, contentDescription = iconDescription)
+        }
        Spacer(Modifier.width(8.dp))
        Text(text)
    }
@@ -93,7 +95,7 @@ fun AboutScreenNavButton(
        modifier = modifier
    ) {
        Icon(
-            imageVector = Icons.Outlined.Info,
+            imageVector = Icons.Default.Info,
            contentDescription = stringResource(R.string.about),
            tint = MaterialTheme.colorScheme.onSurface.copy(alpha = 0.6f))
    }
--- a/app/src/main/java/org/mydomain/myscan/view/CameraPreview.kt
+++ b/app/src/main/java/org/mydomain/myscan/view/CameraPreview.kt
@@ -14,14 +14,10 @@
 */
 package org.mydomain.myscan.view

-import android.content.pm.PackageManager.PERMISSION_GRANTED
 import android.graphics.Bitmap
 import android.util.Log
 import android.view.ViewGroup.LayoutParams.MATCH_PARENT
 import android.widget.LinearLayout
-import android.widget.Toast
-import androidx.activity.compose.rememberLauncherForActivityResult
-import androidx.activity.result.contract.ActivityResultContracts
 import androidx.camera.core.CameraSelector
 import androidx.camera.core.ImageAnalysis
 import androidx.camera.core.ImageCapture
@@ -58,7 +54,8 @@ import androidx.lifecycle.compose.LocalLifecycleOwner
 import com.google.common.util.concurrent.ListenableFuture
 import org.mydomain.myscan.LiveAnalysisState
 import org.mydomain.myscan.Point
-import org.mydomain.myscan.R
+import org.mydomain.myscan.hasCameraPermission
+import org.mydomain.myscan.rememberCameraPermissionLauncher
 import org.mydomain.myscan.scaledTo
 import java.util.concurrent.ExecutorService
 import java.util.concurrent.Executors
@@ -71,18 +68,10 @@ fun CameraPreview(
    onPreviewViewReady: (PreviewView) -> Unit,
 ) {
    val context = LocalContext.current
-    val requestPermissionLauncher = rememberLauncherForActivityResult(
-        ActivityResultContracts.RequestPermission()
-    ) { isGranted: Boolean ->
-        if (!isGranted) {
-            Toast.makeText(context,
-                context.getString(R.string.camera_permission_denied), Toast.LENGTH_SHORT).show()
-        }
-    }
-
+    val requestPermissionLauncher = rememberCameraPermissionLauncher(onGranted = {}, onDenied = {})
    LaunchedEffect(Unit) {
        val camera = android.Manifest.permission.CAMERA
-        if (ContextCompat.checkSelfPermission(context, camera) != PERMISSION_GRANTED) {
+        if (!hasCameraPermission(context)) {
            requestPermissionLauncher.launch(camera)
        }
    }
--- a/app/src/main/java/org/mydomain/myscan/view/CameraScreen.kt
+++ b/app/src/main/java/org/mydomain/myscan/view/CameraScreen.kt
@@ -18,6 +18,7 @@ import android.content.res.Configuration
 import android.graphics.Bitmap
 import android.graphics.BitmapFactory
 import android.util.Log
+import androidx.activity.compose.BackHandler
 import androidx.camera.core.ImageProxy
 import androidx.camera.view.PreviewView
 import androidx.compose.animation.core.animateFloat
@@ -77,6 +78,7 @@ import kotlinx.coroutines.delay
 import org.mydomain.myscan.LiveAnalysisState
 import org.mydomain.myscan.MainViewModel
 import org.mydomain.myscan.MainViewModel.CaptureState
+import org.mydomain.myscan.Navigation
 import org.mydomain.myscan.R
 import org.mydomain.myscan.Screen
 import org.mydomain.myscan.ui.theme.MyScanTheme
@@ -96,6 +98,7 @@ const val ANIMATION_DURATION = 200
@Composable
 fun CameraScreen(
    viewModel: MainViewModel,
+    navigation: Navigation,
    liveAnalysisState: LiveAnalysisState,
    onImageAnalyzed: (ImageProxy) -> Unit,
    onFinalizePressed: () -> Unit,
@@ -105,6 +108,8 @@ fun CameraScreen(
    val thumbnailCoords = remember { mutableStateOf(Offset.Zero) }
    var isDebugMode by remember { mutableStateOf(false) }

+    BackHandler { navigation.back() }
+
    val captureController = remember { CameraCaptureController() }
    DisposableEffect(Unit) {
        onDispose { captureController.shutdown() }
@@ -169,7 +174,7 @@ fun CameraScreen(
        onFinalizePressed = onFinalizePressed,
        onDebugModeSwitched = { isDebugMode = !isDebugMode },
        thumbnailCoords = thumbnailCoords,
-        toAboutScreen = { viewModel.navigateTo(Screen.About) }
+        navigation = navigation
    )
 }

@@ -182,7 +187,7 @@ private fun CameraScreenScaffold(
    onFinalizePressed: () -> Unit,
    onDebugModeSwitched: () -> Unit,
    thumbnailCoords: MutableState<Offset>,
-    toAboutScreen: () -> Unit,
+    navigation: Navigation,
 ) {
    var tapCount by remember { mutableStateOf(0) }
    var lastTapTime by remember { mutableStateOf(0L) }
@@ -203,8 +208,9 @@ private fun CameraScreenScaffold(

    Box {
        MyScaffold(
-            toAboutScreen = toAboutScreen,
+            toAboutScreen = navigation.toAboutScreen,
            pageListState = pageListState,
+            onBack = navigation.back,
            bottomBar = { Bar(cameraUiState.pageCount, onPageCountClick, onFinalizePressed) }
        ) {
            modifier -> CameraPreviewBox(cameraPreview, cameraUiState, onCapture, modifier)
@@ -436,7 +442,6 @@ fun CameraScreenPreviewInLandscapeMode() {

@Composable
 private fun ScreenPreview(captureState: CaptureState, rotationDegrees: Float = 0f) {
-    val context = LocalContext.current
    MyScanTheme {
        val thumbnailCoords = remember { mutableStateOf(Offset.Zero) }
        CameraScreenScaffold(
@@ -456,13 +461,9 @@ private fun ScreenPreview(captureState: CaptureState, rotationDegrees: Float = 0
            },
            pageListState =
                CommonPageListState(
-                    document = DocumentUiModel(
-                        pageIds = listOf(1, 2, 2, 2).map { "gallica.bnf.fr-bpt6k5530456s-$it.jpg" },
-                        imageLoader = { id ->
-                            context.assets.open(id).use { input ->
-                                BitmapFactory.decodeStream(input)
-                            }
-                        }),
+                    document = fakeDocument(
+                        listOf(1, 2, 2, 2).map { "gallica.bnf.fr-bpt6k5530456s-$it.jpg" },
+                        LocalContext.current),
                    onPageClick = {},
                    listState = LazyListState(),
                ),
@@ -472,7 +473,7 @@ private fun ScreenPreview(captureState: CaptureState, rotationDegrees: Float = 0
            onFinalizePressed = {},
            onDebugModeSwitched = {},
            thumbnailCoords = thumbnailCoords,
-            toAboutScreen = {}
+            navigation = dummyNavigation()
        )
    }
 }
--- a/app/src/main/java/org/mydomain/myscan/view/DocumentScreen.kt
+++ b/app/src/main/java/org/mydomain/myscan/view/DocumentScreen.kt
@@ -14,7 +14,6 @@
 */
 package org.mydomain.myscan.view

-import android.graphics.BitmapFactory
 import androidx.activity.compose.BackHandler
 import androidx.compose.foundation.Image
 import androidx.compose.foundation.background
@@ -31,8 +30,8 @@ import androidx.compose.foundation.lazy.rememberLazyListState
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Add
+import androidx.compose.material.icons.filled.Close
 import androidx.compose.material.icons.filled.PictureAsPdf
-import androidx.compose.material.icons.filled.RestartAlt
 import androidx.compose.material.icons.outlined.Delete
 import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.ExperimentalMaterial3Api
@@ -114,7 +113,7 @@ fun DocumentScreen(
    ) { modifier ->
        DocumentPreview(document, currentPageIndex, onDeleteImage, modifier)
        if (showNewDocDialog.value) {
-            NewDocumentDialog(onConfirm = onStartNew, showNewDocDialog)
+            NewDocumentDialog(onConfirm = onStartNew, showNewDocDialog, stringResource(R.string.close_document))
        }
        if (showPdfDialog.value) {
            PdfGenerationBottomSheetWrapper(
@@ -203,7 +202,7 @@ private fun BottomBar(
        )
        Spacer(modifier = Modifier.width(8.dp))
        SecondaryActionButton(
-            icon = Icons.Default.RestartAlt,
+            icon = Icons.Default.Close,
            contentDescription = stringResource(R.string.restart),
            onClick = { showNewDocDialog.value = true },
            modifier = Modifier.padding(vertical = 8.dp)
@@ -212,9 +211,9 @@ private fun BottomBar(
 }

@Composable
-fun NewDocumentDialog(onConfirm: () -> Unit, showDialog: MutableState<Boolean>) {
+fun NewDocumentDialog(onConfirm: () -> Unit, showDialog: MutableState<Boolean>, title: String) {
    AlertDialog(
-        title = { Text(stringResource(R.string.new_document)) },
+        title = { Text(title) },
        text = { Text(stringResource(R.string.new_document_warning)) },
        confirmButton = {
            TextButton (onClick = {
@@ -236,20 +235,13 @@ fun NewDocumentDialog(onConfirm: () -> Unit, showDialog: MutableState<Boolean>)
@Composable
@Preview
 fun DocumentScreenPreview() {
-    val context = LocalContext.current
    MyScanTheme {
        DocumentScreen(
-            DocumentUiModel(
+            fakeDocument(
                listOf(1, 2, 2, 2).map { "gallica.bnf.fr-bpt6k5530456s-$it.jpg" },
-                { id ->
-                    context.assets.open(id).use { input ->
-                        BitmapFactory.decodeStream(input)
-                    }
-                }
-            ),
+                LocalContext.current),
            initialPage = 1,
-            navigation = Navigation(
-                {}, {}, {}, {}, {}),
+            navigation = dummyNavigation(),
            pdfActions = PdfGenerationActions(
                {}, {}, {},
                MutableStateFlow(PdfGenerationUiState()),
--- a/app/src/main/java/org/mydomain/myscan/view/HomeScreen.kt
+++ b/app/src/main/java/org/mydomain/myscan/view/HomeScreen.kt
@@ -0,0 +1,210 @@
+/*
+ * Copyright 2025 Pierre-Yves Nicolas
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version.
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+package org.mydomain.myscan.view
+
+import android.Manifest
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.PhotoCamera
+import androidx.compose.material3.BottomAppBar
+import androidx.compose.material3.Button
+import androidx.compose.material3.Card
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.saveable.rememberSaveable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.asImageBitmap
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import org.mydomain.myscan.Navigation
+import org.mydomain.myscan.R
+import org.mydomain.myscan.rememberCameraPermissionLauncher
+import org.mydomain.myscan.ui.theme.MyScanTheme
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+// FIXME Extract strings
+fun HomeScreen(
+    hasCameraPermission: Boolean,
+    currentDocument: DocumentUiModel,
+    navigation: Navigation,
+    onStartNewScan: () -> Unit
+) {
+    val showCloseDocDialog = rememberSaveable { mutableStateOf(false) }
+    Scaffold (
+        topBar = {
+            TopAppBar(
+                title = { Text(stringResource(R.string.app_name)) },
+                actions = {
+                    AboutScreenNavButton(onClick = navigation.toAboutScreen)
+                }
+            )
+        },
+        bottomBar = {
+            BottomAppBar {
+                Spacer(Modifier.weight(1f))
+                MainActionButton(
+                    onClick = {
+                        if (currentDocument.isEmpty()) {
+                            onStartNewScan()
+                        } else {
+                            showCloseDocDialog.value = true
+                        }
+                    },
+                    icon = Icons.Default.PhotoCamera,
+                    text = "Start a new scan",
+                    modifier = Modifier
+                        .padding(12.dp)
+                        .height(48.dp),
+                    )
+            }
+        }
+    ) { padding ->
+        Column (
+            modifier = Modifier
+                .padding(padding)
+                .fillMaxSize()
+                .verticalScroll(rememberScrollState())
+        ) {
+            if (!hasCameraPermission) {
+                CameraPermissionRationale()
+            }
+
+            if (!currentDocument.isEmpty()) {
+                SectionTitle("Current document")
+                CurrentDocumentCard(currentDocument, navigation)
+            }
+
+            if (showCloseDocDialog.value) {
+                NewDocumentDialog(
+                    onConfirm = onStartNewScan,
+                    showCloseDocDialog,
+                    stringResource(R.string.new_document))
+            }
+        }
+    }
+}
+
+@Composable
+private fun CameraPermissionRationale() {
+    val requestPermissionLauncher = rememberCameraPermissionLauncher(onGranted = {}, onDenied = {})
+    Card(
+        modifier = Modifier
+            .fillMaxWidth()
+            .padding(12.dp)
+    ) {
+        Column(Modifier.padding(16.dp)) {
+            Text(
+                "The app requires camera access to scan documents. " +
+                        "Captured images are stored only on this device and will be deleted " +
+                        "when you close the current document.",
+                style = MaterialTheme.typography.bodyMedium
+            )
+            Spacer(Modifier.height(8.dp))
+            Button(onClick = {
+                requestPermissionLauncher.launch(Manifest.permission.CAMERA)
+            }) {
+                Text("Grant permission")
+            }
+        }
+    }
+}
+
+@Composable
+private fun CurrentDocumentCard(
+    currentDocument: DocumentUiModel,
+    navigation: Navigation,
+) {
+    Card(
+        modifier = Modifier
+            .fillMaxWidth()
+            .padding(horizontal = 12.dp, vertical = 6.dp)
+    ) {
+        Row(
+            verticalAlignment = Alignment.CenterVertically,
+            modifier = Modifier.padding(12.dp)
+        ) {
+            currentDocument.load(0)?.let {
+                Image(
+                    bitmap = it.asImageBitmap(),
+                    contentDescription = null,
+                    modifier = Modifier
+                        .height(100.dp)
+                        .padding(4.dp)
+                )
+            }
+            Spacer(Modifier.width(12.dp))
+            Column(Modifier.weight(1f)) {
+                Text(pageCountText(currentDocument.pageCount()))
+            }
+            MainActionButton(navigation.toDocumentScreen, "Open")
+        }
+    }
+}
+
+@Composable
+private fun SectionTitle(text: String) {
+    Text(
+        text,
+        style = MaterialTheme.typography.titleLarge,
+        modifier = Modifier.padding(start = 12.dp, top = 16.dp, bottom = 8.dp)
+    )
+}
+
+@Preview
+@Composable
+fun HomeScreenPreviewOnFirstLaunch() {
+    MyScanTheme {
+        HomeScreen(
+            hasCameraPermission = false,
+            currentDocument = DocumentUiModel(listOf()) { _ -> null },
+            navigation = dummyNavigation(),
+            onStartNewScan = {}
+        )
+    }
+}
+
+@Preview
+@Composable
+fun HomeScreenPreviewWithCurrentDocument() {
+    MyScanTheme {
+        HomeScreen(
+            hasCameraPermission = true,
+            currentDocument = fakeDocument(
+                listOf("gallica.bnf.fr-bpt6k5530456s-1.jpg"),
+                LocalContext.current),
+            navigation = dummyNavigation(),
+            onStartNewScan = {}
+        )
+    }
+}
--- a/app/src/main/java/org/mydomain/myscan/view/PreviewUtils.kt
+++ b/app/src/main/java/org/mydomain/myscan/view/PreviewUtils.kt
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2025 Pierre-Yves Nicolas
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version.
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+package org.mydomain.myscan.view
+
+import android.content.Context
+import android.graphics.BitmapFactory
+import org.mydomain.myscan.Navigation
+
+fun dummyNavigation(): Navigation {
+    return Navigation({}, {}, {}, {}, {}, {})
+}
+
+fun fakeDocument(pageIds: List<String>, context: Context): DocumentUiModel {
+    return DocumentUiModel(pageIds) { id ->
+        context.assets.open(id).use { input ->
+            BitmapFactory.decodeStream(input)
+        }
+    }
+}
--- a/app/src/main/res/values-fr/strings.xml
+++ b/app/src/main/res/values-fr/strings.xml
@@ -7,6 +7,7 @@
    <string name="camera_permission_denied">L\'autorisation d\'accès à la caméra a été refusée</string>
    <string name="cancel">Annuler</string>
    <string name="close">Fermer</string>
+    <string name="close_document">Fermer le document</string>
    <string name="delete_page">Supprimer la page</string>
    <string name="document">Document</string>
    <string name="error">Erreur : %1$s</string>
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -7,6 +7,7 @@
    <string name="camera_permission_denied">Camera permission was denied</string>
    <string name="cancel">Cancel</string>
    <string name="close">Close</string>
+    <string name="close_document">Close document</string>
    <string name="delete_page">Delete page</string>
    <string name="document">Document</string>
    <string name="error">Error: %1$s</string>