Screenshot Detection (#278)

androidApp/src/main/kotlin/org/michaelbel/movies/MainActivity.kt

@@ -9,6 +9,9 @@ import androidx.fragment.app.FragmentActivity
 import org.koin.androidx.viewmodel.ext.android.viewModel
 import org.michaelbel.movies.common.ktx.launchAndCollectIn
 import org.michaelbel.movies.ui.ktx.resolveNotificationPreferencesIntent
+import org.michaelbel.movies.ui.ktx.setScreenshotBlockEnabled
+import org.michaelbel.movies.ui.ktx.supportRegisterScreenCaptureCallback
+import org.michaelbel.movies.ui.ktx.supportUnregisterScreenCaptureCallback
 import org.michaelbel.movies.ui.shortcuts.installShortcuts
 
 internal class MainActivity: FragmentActivity() {
@@ -26,8 +29,21 @@ internal class MainActivity: FragmentActivity() {
         }
         resolveNotificationPreferencesIntent()
         viewModel.run {
+            isScreenshotBlockEnabled.launchAndCollectIn(this@MainActivity) { enabled ->
+                window.setScreenshotBlockEnabled(enabled)
+            }
             authenticateFlow.launchAndCollectIn(this@MainActivity) { authenticate(this@MainActivity) }
             cancelFlow.launchAndCollectIn(this@MainActivity) { finish() }
         }
     }
+
+    override fun onStart() {
+        super.onStart()
+        supportRegisterScreenCaptureCallback()
+    }
+
+    override fun onStop() {
+        super.onStop()
+        supportUnregisterScreenCaptureCallback()
+    }
 }

androidApp/src/main/kotlin/org/michaelbel/movies/MainViewModel.kt

@@ -54,6 +54,13 @@ internal class MainViewModel(
             initialValue = ThemeData.Default
         )
 
+    val isScreenshotBlockEnabled: StateFlow<Boolean> = interactor.isScreenshotBlockEnabled
+        .stateIn(
+            scope = this,
+            started = SharingStarted.Lazily,
+            initialValue = false
+        )
+
     init {
         fetchBiometric()
         fetchRemoteConfig()

core/interactor-kmp/src/commonMain/kotlin/org/michaelbel/movies/interactor/SettingsInteractor.kt

@@ -18,6 +18,8 @@ interface SettingsInteractor {
 
     val isBiometricEnabled: Flow<Boolean>
 
+    val isScreenshotBlockEnabled: Flow<Boolean>
+
     suspend fun isBiometricEnabledAsync(): Boolean
 
     suspend fun selectTheme(
@@ -47,4 +49,8 @@ interface SettingsInteractor {
     suspend fun setBiometricEnabled(
         enabled: Boolean
     )
+
+    suspend fun setScreenshotBlockEnabled(
+        enabled: Boolean
+    )
 }

core/interactor-kmp/src/commonMain/kotlin/org/michaelbel/movies/interactor/impl/SettingsInteractorImpl.kt

@@ -31,6 +31,8 @@ internal class SettingsInteractorImpl(
 
     override val isBiometricEnabled: Flow<Boolean> = settingsRepository.isBiometricEnabled
 
+    override val isScreenshotBlockEnabled: Flow<Boolean> = settingsRepository.isScreenshotBlockEnabled
+
     override suspend fun isBiometricEnabledAsync(): Boolean {
         return settingsRepository.isBiometricEnabledAsync()
     }
@@ -80,4 +82,10 @@ internal class SettingsInteractorImpl(
             settingsRepository.setBiometricEnabled(enabled)
         }
     }
+
+    override suspend fun setScreenshotBlockEnabled(enabled: Boolean) {
+        withContext(dispatchers.main) {
+            settingsRepository.setScreenshotBlockEnabled(enabled)
+        }
+    }
 }

core/persistence-kmp/src/commonMain/kotlin/org/michaelbel/movies/persistence/datastore/MoviesPreferences.kt

@@ -30,6 +30,9 @@ class MoviesPreferences(
     val isBiometricEnabledFlow: Flow<Boolean?>
         get() = dataStore.data.map { preferences -> preferences[PREFERENCE_BIOMETRIC_KEY] }
 
+    val isScreenshotBlockEnabledFlow: Flow<Boolean?>
+        get() = dataStore.data.map { preferences -> preferences[PREFERENCE_SCREENSHOT_BLOCK_KEY] }
+
     val paletteKeyFlow: Flow<Int?>
         get() = dataStore.data.map { preferences -> preferences[PREFERENCE_PALETTE_KEY] }
 
@@ -125,6 +128,12 @@ class MoviesPreferences(
         }
     }
 
+    suspend fun setScreenshotBlockEnabled(enabled: Boolean) {
+        dataStore.edit { preferences ->
+            preferences[PREFERENCE_SCREENSHOT_BLOCK_KEY] = enabled
+        }
+    }
+
     suspend fun setPaletteKey(paletteKey: Int) {
         dataStore.edit { preferences ->
             preferences[PREFERENCE_PALETTE_KEY] = paletteKey
@@ -149,5 +158,6 @@ class MoviesPreferences(
         private val PREFERENCE_BIOMETRIC_KEY = booleanPreferencesKey("biometric")
         private val PREFERENCE_PALETTE_KEY = intPreferencesKey("palette")
         private val PREFERENCE_SEED_COLOR_KEY = intPreferencesKey("seed_color")
+        private val PREFERENCE_SCREENSHOT_BLOCK_KEY = booleanPreferencesKey("screenshot_block")
     }
 }

core/repository-kmp/src/commonMain/kotlin/org/michaelbel/movies/repository/SettingsRepository.kt

@@ -18,6 +18,8 @@ interface SettingsRepository {
 
     val isBiometricEnabled: Flow<Boolean>
 
+    val isScreenshotBlockEnabled: Flow<Boolean>
+
     suspend fun isBiometricEnabledAsync(): Boolean
 
     suspend fun selectTheme(
@@ -47,4 +49,8 @@ interface SettingsRepository {
     suspend fun setBiometricEnabled(
         enabled: Boolean
     )
+
+    suspend fun setScreenshotBlockEnabled(
+        enabled: Boolean
+    )
 }

core/repository-kmp/src/commonMain/kotlin/org/michaelbel/movies/repository/impl/SettingsRepositoryImpl.kt

@@ -48,6 +48,10 @@ internal class SettingsRepositoryImpl(
         enabled ?: false
     }
 
+    override val isScreenshotBlockEnabled: Flow<Boolean> = preferences.isScreenshotBlockEnabledFlow.map { enabled ->
+        enabled ?: false
+    }
+
     override suspend fun isBiometricEnabledAsync(): Boolean {
         return preferences.isBiometricEnabledAsync()
     }
@@ -79,4 +83,8 @@ internal class SettingsRepositoryImpl(
     override suspend fun setBiometricEnabled(enabled: Boolean) {
         preferences.setBiometricEnabled(enabled)
     }
+
+    override suspend fun setScreenshotBlockEnabled(enabled: Boolean) {
+        preferences.setScreenshotBlockEnabled(enabled)
+    }
 }

core/ui-kmp/src/androidMain/AndroidManifest.xml

@@ -2,6 +2,8 @@
 <manifest
     xmlns:android="http://schemas.android.com/apk/res/android">
 
+    <uses-permission android:name="android.permission.DETECT_SCREEN_CAPTURE" />
+
     <application>
 
         <service

core/ui-kmp/src/androidMain/kotlin/org/michaelbel/movies/ui/ktx/ActivityKtx.kt

@@ -0,0 +1,25 @@
+package org.michaelbel.movies.ui.ktx
+
+import android.app.Activity
+import android.os.Build
+
+private val screenCaptureCallback: Any
+    get() {
+        return if (Build.VERSION.SDK_INT >= 34) {
+            Activity.ScreenCaptureCallback {}
+        } else {
+            Unit
+        }
+    }
+
+fun Activity.supportRegisterScreenCaptureCallback() {
+    if (Build.VERSION.SDK_INT >= 34) {
+        registerScreenCaptureCallback(mainExecutor, screenCaptureCallback as Activity.ScreenCaptureCallback)
+    }
+}
+
+fun Activity.supportUnregisterScreenCaptureCallback() {
+    if (Build.VERSION.SDK_INT >= 34) {
+        unregisterScreenCaptureCallback(screenCaptureCallback as Activity.ScreenCaptureCallback)
+    }
+}

core/ui-kmp/src/androidMain/kotlin/org/michaelbel/movies/ui/ktx/WindowKtx.kt

@@ -0,0 +1,12 @@
+package org.michaelbel.movies.ui.ktx
+
+import android.view.Window
+import android.view.WindowManager
+
+fun Window.setScreenshotBlockEnabled(enabled: Boolean) {
+    if (enabled) {
+        setFlags(WindowManager.LayoutParams.FLAG_SECURE, WindowManager.LayoutParams.FLAG_SECURE)
+    } else {
+        clearFlags(WindowManager.LayoutParams.FLAG_SECURE)
+    }
+}

core/ui-kmp/src/commonMain/composeResources/values-ru/strings.xml

@@ -114,6 +114,8 @@
     <string name="settings_update">Обнови приложение</string>
     <string name="settings_update_description">Используя In-App Update API</string>
     <string name="settings_palette_colors">Палитра цветов</string>
+    <string name="settings_screenshots">Скриншоты</string>
+    <string name="settings_screenshots_description">Запретить делать скриншоты</string>
 
     <string name="appwidget_description">Отображает предстоящие фильмы</string>
     <string name="appwidget_title">Скоро в кино</string>

core/ui-kmp/src/commonMain/composeResources/values/strings.xml

@@ -114,6 +114,8 @@
     <string name="settings_update">Update App</string>
     <string name="settings_update_description">Using In-App Update API</string>
     <string name="settings_palette_colors">Palette Colors</string>
+    <string name="settings_screenshots">Screenshots</string>
+    <string name="settings_screenshots_description">Block taking screenshots</string>
 
     <string name="appwidget_description">Display upcoming movies</string>
     <string name="appwidget_title">Upcoming Movies</string>

core/ui-kmp/src/commonMain/kotlin/org/michaelbel/movies/ui/icons/MoviesIcons.kt

@@ -20,6 +20,7 @@ import androidx.compose.material.icons.outlined.LocalMovies
 import androidx.compose.material.icons.outlined.LocationOn
 import androidx.compose.material.icons.outlined.Notifications
 import androidx.compose.material.icons.outlined.Palette
+import androidx.compose.material.icons.outlined.Screenshot
 import androidx.compose.material.icons.outlined.Search
 import androidx.compose.material.icons.outlined.Settings
 import androidx.compose.material.icons.outlined.Share
@@ -79,6 +80,7 @@ object MoviesIcons {
     val LocalMovies = Icons.Outlined.LocalMovies
     val Notifications = Icons.Outlined.Notifications
     val Palette = Icons.Outlined.Palette
+    val Screenshot = Icons.Outlined.Screenshot
     val Search = Icons.Outlined.Search
     val Settings = Icons.Outlined.Settings
     val Share = Icons.Outlined.Share

core/ui-kmp/src/commonMain/kotlin/org/michaelbel/movies/ui/strings/MoviesStrings.kt

@@ -97,6 +97,8 @@ import movies.core.ui_kmp.generated.resources.settings_post_notifications_grante
 import movies.core.ui_kmp.generated.resources.settings_post_notifications_should_request
 import movies.core.ui_kmp.generated.resources.settings_review
 import movies.core.ui_kmp.generated.resources.settings_review_description
+import movies.core.ui_kmp.generated.resources.settings_screenshots
+import movies.core.ui_kmp.generated.resources.settings_screenshots_description
 import movies.core.ui_kmp.generated.resources.settings_theme
 import movies.core.ui_kmp.generated.resources.settings_theme_amoled
 import movies.core.ui_kmp.generated.resources.settings_theme_dark
@@ -227,6 +229,8 @@ object MoviesStrings {
     val settings_update = Res.string.settings_update
     val settings_update_description = Res.string.settings_update_description
     val settings_palette_colors = Res.string.settings_palette_colors
+    val settings_screenshots = Res.string.settings_screenshots
+    val settings_screenshots_description = Res.string.settings_screenshots_description
 
     @Composable
     fun settings_app_version_name(vararg formatArgs: Any): String {

feature/settings-impl-kmp/src/androidMain/kotlin/org/michaelbel/movies/settings/SettingsViewModel.kt

@@ -75,6 +75,13 @@ class SettingsViewModel(
             initialValue = false
         )
 
+    val isScreenshotBlockEnabled: StateFlow<Boolean> = interactor.isScreenshotBlockEnabled
+        .stateIn(
+            scope = this,
+            started = SharingStarted.Lazily,
+            initialValue = false
+        )
+
     val appVersionData: StateFlow<AppVersionData> = flowOf(AppVersionData(appService.flavor.name))
         .stateIn(
             scope = this,
@@ -120,6 +127,10 @@ class SettingsViewModel(
         interactor.setBiometricEnabled(enabled)
     }
 
+    fun setScreenshotBlockEnabled(enabled: Boolean) = launch {
+        interactor.setScreenshotBlockEnabled(enabled)
+    }
+
     fun requestReview(activity: Activity) {
         reviewService.requestReview(activity)
     }

feature/settings-impl-kmp/src/androidMain/kotlin/org/michaelbel/movies/settings/model/Features.kt

@@ -36,6 +36,9 @@ internal actual val isTileFeatureEnabled: Boolean
 internal actual val isAppIconFeatureEnabled: Boolean
     get() = true
 
+internal actual val isScreenshotFeatureEnabled: Boolean
+    get() = true
+
 internal actual val isGithubFeatureEnabled: Boolean
     get() = true
 

feature/settings-impl-kmp/src/androidMain/kotlin/org/michaelbel/movies/settings/ui/SettingsRoute.kt

@@ -54,6 +54,7 @@ import org.michaelbel.movies.settings.model.isLanguageFeatureEnabled
 import org.michaelbel.movies.settings.model.isMovieListFeatureEnabled
 import org.michaelbel.movies.settings.model.isNotificationsFeatureEnabled
 import org.michaelbel.movies.settings.model.isReviewAppFeatureEnabled
+import org.michaelbel.movies.settings.model.isScreenshotFeatureEnabled
 import org.michaelbel.movies.settings.model.isThemeFeatureEnabled
 import org.michaelbel.movies.settings.model.isTileFeatureEnabled
 import org.michaelbel.movies.settings.model.isUpdateAppFeatureEnabled
@@ -81,6 +82,7 @@ fun SettingsRoute(
     val currentMovieList by viewModel.currentMovieList.collectAsStateWithLifecycle()
     val isBiometricFeatureAvailable by viewModel.isBiometricFeatureEnabled.collectAsStateWithLifecycle()
     val isBiometricEnabled by viewModel.isBiometricEnabled.collectAsStateWithLifecycle()
+    val isScreenshotBlockEnabled by viewModel.isScreenshotBlockEnabled.collectAsStateWithLifecycle()
     val appVersionData by viewModel.appVersionData.collectAsStateWithLifecycle()
 
     val context = LocalContext.current
@@ -248,6 +250,11 @@ fun SettingsRoute(
                     context.setIcon(icon)
                 }
             ),
+            screenshotData = SettingsData.ChangedData(
+                isFeatureEnabled = isScreenshotFeatureEnabled,
+                isEnabled = isScreenshotBlockEnabled,
+                onChange = viewModel::setScreenshotBlockEnabled
+            ),
             githubData = SettingsData.RequestedData(
                 isFeatureEnabled = isGithubFeatureEnabled,
                 onRequest = { openUrl(resultContract, toolbarColor, MOVIES_GITHUB_URL) }

feature/settings-impl-kmp/src/commonMain/kotlin/org/michaelbel/movies/settings/model/Features.kt

@@ -11,6 +11,7 @@ internal expect val isBiometricFeatureEnabled: Boolean
 internal expect val isWidgetFeatureEnabled: Boolean
 internal expect val isTileFeatureEnabled: Boolean
 internal expect val isAppIconFeatureEnabled: Boolean
+internal expect val isScreenshotFeatureEnabled: Boolean
 internal expect val isGithubFeatureEnabled: Boolean
 internal expect val isReviewAppFeatureEnabled: Boolean
 internal expect val isUpdateAppFeatureEnabled: Boolean

feature/settings-impl-kmp/src/commonMain/kotlin/org/michaelbel/movies/settings/model/SettingsData.kt

@@ -21,6 +21,7 @@ data class SettingsData(
     val widgetData: RequestedData,
     val tileData: RequestedData,
     val appIconData: ListData<IconAlias>,
+    val screenshotData: ChangedData,
     val githubData: RequestedData,
     val reviewAppData: RequestedData,
     val updateAppData: RequestedData,

feature/settings-impl-kmp/src/commonMain/kotlin/org/michaelbel/movies/settings/ui/SettingsScreenContent.kt

@@ -400,6 +400,24 @@ internal fun SettingsScreenContent(
                     }
                 }
             }
+            if (settingsData.screenshotData.isFeatureEnabled) {
+                item {
+                    HorizontalDivider(
+                        modifier = Modifier.padding(horizontal = 16.dp, vertical = 4.dp),
+                        thickness = .1.dp,
+                        color = MaterialTheme.colorScheme.onPrimaryContainer
+                    )
+                }
+                item {
+                    SettingSwitchItem(
+                        title = stringResource(MoviesStrings.settings_screenshots),
+                        description = stringResource(MoviesStrings.settings_screenshots_description),
+                        icon = MoviesIcons.Screenshot,
+                        checked = settingsData.screenshotData.isEnabled,
+                        onClick = { settingsData.screenshotData.onChange(!settingsData.screenshotData.isEnabled) }
+                    )
+                }
+            }
             if (settingsData.githubData.isFeatureEnabled) {
                 item {
                     HorizontalDivider(

feature/settings-impl-kmp/src/desktopMain/kotlin/org/michaelbel/movies/settings/model/Features.kt

@@ -33,6 +33,9 @@ internal actual val isTileFeatureEnabled: Boolean
 internal actual val isAppIconFeatureEnabled: Boolean
     get() = false
 
+internal actual val isScreenshotFeatureEnabled: Boolean
+    get() = false
+
 internal actual val isGithubFeatureEnabled: Boolean
     get() = true
 

feature/settings-impl-kmp/src/desktopMain/kotlin/org/michaelbel/movies/settings/ui/SettingsRoute.kt

@@ -25,6 +25,7 @@ import org.michaelbel.movies.settings.model.isLanguageFeatureEnabled
 import org.michaelbel.movies.settings.model.isMovieListFeatureEnabled
 import org.michaelbel.movies.settings.model.isNotificationsFeatureEnabled
 import org.michaelbel.movies.settings.model.isReviewAppFeatureEnabled
+import org.michaelbel.movies.settings.model.isScreenshotFeatureEnabled
 import org.michaelbel.movies.settings.model.isThemeFeatureEnabled
 import org.michaelbel.movies.settings.model.isTileFeatureEnabled
 import org.michaelbel.movies.settings.model.isUpdateAppFeatureEnabled
@@ -102,6 +103,11 @@ fun SettingsRoute(
                 current = IconAlias.Red,
                 onSelect = {}
             ),
+            screenshotData = SettingsData.ChangedData(
+                isFeatureEnabled = isScreenshotFeatureEnabled,
+                isEnabled = false,
+                onChange = {}
+            ),
             githubData = SettingsData.RequestedData(
                 isFeatureEnabled = isGithubFeatureEnabled,
                 onRequest = { openUrl(MOVIES_GITHUB_URL) }