Start FlexiNotifs

* Adds a basic composable that draws the notification placeholder * Moves the SharedNotificationContainer to be a sibling of the SceneContainer (under SceneWindowRootView) * Demonstrates the composable setting data on a view model * Demonstrates the other view model setting data on the NSSLController + AmbientState Bug: 296118689 Flag: ACONFIG com.android.systemui.scene_container DEVELOPMENT Test: flexiglass on + enable flexi_notifs Change-Id: If04403534a481b0420596aa6e38d8a9c10f2fc26
author: Jeff DeCew <jeffdq@google.com> 2023-09-19 21:08:13 +0000
committer: Jeff DeCew <jeffdq@google.com> 2023-11-16 17:39:11 +0000
commit: cdd70211b3594163bf88b21dd62272ea5370f79d (patch)
tree: 3976639900848bea93b47bbc61f7d750a62be480
parent: 45d0bd1e7af185452b49ad81d45db45756f3edcc (diff)
35 files changed, 690 insertions, 114 deletions
diff --git a/packages/SystemUI/compose/features/src/com/android/systemui/keyguard/ui/composable/LockscreenScene.kt b/packages/SystemUI/compose/features/src/com/android/systemui/keyguard/ui/composable/LockscreenScene.kt
index ee310ab41373..cc95a4b72731 100644
--- a/packages/SystemUI/compose/features/src/com/android/systemui/keyguard/ui/composable/LockscreenScene.kt
+++ b/packages/SystemUI/compose/features/src/com/android/systemui/keyguard/ui/composable/LockscreenScene.kt
@@ -33,6 +33,7 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.geometry.Rect
 import androidx.compose.ui.graphics.toComposeRect
 import androidx.compose.ui.input.pointer.pointerInput
+import androidx.compose.ui.layout.Layout
 import androidx.compose.ui.viewinterop.AndroidView
 import androidx.core.view.isVisible
 import com.android.compose.animation.scene.SceneScope
@@ -41,6 +42,7 @@ import com.android.systemui.dagger.qualifiers.Application
 import com.android.systemui.keyguard.qualifiers.KeyguardRootView
 import com.android.systemui.keyguard.ui.viewmodel.KeyguardLongPressViewModel
 import com.android.systemui.keyguard.ui.viewmodel.LockscreenSceneViewModel
+import com.android.systemui.notifications.ui.composable.NotificationStack
 import com.android.systemui.res.R
 import com.android.systemui.scene.shared.model.Direction
 import com.android.systemui.scene.shared.model.Edge
@@ -88,7 +90,7 @@ constructor(
     ) {
         LockscreenScene(
             viewProvider = viewProvider,
-            longPressViewModel = viewModel.longPress,
+            viewModel = viewModel,
             modifier = modifier,
         )
     }
@@ -108,9 +110,9 @@ constructor(
 }
 
 @Composable
-private fun LockscreenScene(
+private fun SceneScope.LockscreenScene(
     viewProvider: () -> View,
-    longPressViewModel: KeyguardLongPressViewModel,
+    viewModel: LockscreenSceneViewModel,
     modifier: Modifier = Modifier,
 ) {
     fun findSettingsMenu(): View {
@@ -121,7 +123,7 @@ private fun LockscreenScene(
         modifier = modifier,
     ) {
         LongPressSurface(
-            viewModel = longPressViewModel,
+            viewModel = viewModel.longPress,
             isSettingsMenuVisible = { findSettingsMenu().isVisible },
             settingsMenuBounds = {
                 val bounds = android.graphics.Rect()
@@ -141,6 +143,28 @@ private fun LockscreenScene(
             },
             modifier = Modifier.fillMaxSize(),
         )
+
+        val notificationStackPosition by
+            viewModel.keyguardRoot.notificationPositionOnLockscreen.collectAsState()
+
+        Layout(
+            modifier = Modifier.fillMaxSize(),
+            content = {
+                NotificationStack(
+                    viewModel = viewModel.notifications,
+                    isScrimVisible = false,
+                )
+            }
+        ) { measurables, constraints ->
+            check(measurables.size == 1)
+            val height = notificationStackPosition.height.toInt()
+            val childConstraints = constraints.copy(minHeight = height, maxHeight = height)
+            val placeable = measurables[0].measure(childConstraints)
+            layout(constraints.maxWidth, constraints.maxHeight) {
+                val start = (constraints.maxWidth - placeable.measuredWidth) / 2
+                placeable.placeRelative(x = start, y = notificationStackPosition.top.toInt())
+            }
+        }
     }
 }
 
diff --git a/packages/SystemUI/compose/features/src/com/android/systemui/notifications/ui/composable/Notifications.kt b/packages/SystemUI/compose/features/src/com/android/systemui/notifications/ui/composable/Notifications.kt
index dd71dfa0b008..c9d31fdcb8e5 100644
--- a/packages/SystemUI/compose/features/src/com/android/systemui/notifications/ui/composable/Notifications.kt
+++ b/packages/SystemUI/compose/features/src/com/android/systemui/notifications/ui/composable/Notifications.kt
@@ -17,56 +17,197 @@
 
 package com.android.systemui.notifications.ui.composable
 
+import android.util.Log
 import androidx.compose.foundation.background
-import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.defaultMinSize
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.layout.LayoutCoordinates
+import androidx.compose.ui.layout.boundsInWindow
+import androidx.compose.ui.layout.onPlaced
+import androidx.compose.ui.layout.onSizeChanged
+import androidx.compose.ui.layout.positionInWindow
+import androidx.compose.ui.unit.IntSize
 import androidx.compose.ui.unit.dp
 import com.android.compose.animation.scene.ElementKey
 import com.android.compose.animation.scene.SceneScope
+import com.android.compose.animation.scene.ValueKey
+import com.android.compose.animation.scene.animateSharedFloatAsState
+import com.android.systemui.notifications.ui.composable.Notifications.Form
+import com.android.systemui.notifications.ui.composable.Notifications.SharedValues.SharedExpansionValue
+import com.android.systemui.statusbar.notification.stack.ui.viewmodel.NotificationsPlaceholderViewModel
 
 object Notifications {
     object Elements {
-        val Notifications = ElementKey("Notifications")
+        val NotificationScrim = ElementKey("NotificationScrim")
+        val NotificationPlaceholder = ElementKey("NotificationPlaceholder")
+        val ShelfSpace = ElementKey("ShelfSpace")
+    }
+
+    object SharedValues {
+        val SharedExpansionValue = ValueKey("SharedExpansionValue")
+    }
+
+    enum class Form {
+        HunFromTop,
+        Stack,
+        HunFromBottom,
     }
 }
 
+/**
+ * Adds the space where heads up notifications can appear in the scene. This should generally be the
+ * entire size of the scene.
+ */
 @Composable
-fun SceneScope.Notifications(
+fun SceneScope.HeadsUpNotificationSpace(
+    viewModel: NotificationsPlaceholderViewModel,
+    isPeekFromBottom: Boolean = false,
     modifier: Modifier = Modifier,
 ) {
-    // TODO(b/272779828): implement.
-    Column(
+    NotificationPlaceholder(
+        viewModel = viewModel,
+        form = if (isPeekFromBottom) Form.HunFromBottom else Form.HunFromTop,
+        modifier = modifier,
+    )
+}
+
+/** Adds the space where notification stack will appear in the scene. */
+@Composable
+fun SceneScope.NotificationStack(
+    viewModel: NotificationsPlaceholderViewModel,
+    isScrimVisible: Boolean,
+    modifier: Modifier = Modifier,
+) {
+    Box(modifier = modifier) {
+        if (isScrimVisible) {
+            Box(
+                modifier =
+                    Modifier.element(Notifications.Elements.NotificationScrim)
+                        .fillMaxSize()
+                        .clip(RoundedCornerShape(32.dp))
+                        .background(MaterialTheme.colorScheme.surface)
+            )
+        }
+        NotificationPlaceholder(
+            viewModel = viewModel,
+            form = Form.Stack,
+            modifier = Modifier.fillMaxSize(),
+        )
+    }
+}
+
+/**
+ * This may be added to the lockscreen to provide a space to the start of the lock icon where the
+ * short shelf has room to flow vertically below the lock icon, but to its start, allowing more
+ * notifications to fit in the stack itself. (see: b/213934746)
+ *
+ * NOTE: this is totally unused for now; it is here to clarify the future plan
+ */
+@Composable
+fun SceneScope.NotificationShelfSpace(
+    viewModel: NotificationsPlaceholderViewModel,
+    modifier: Modifier = Modifier,
+) {
+    Text(
+        text = "Shelf Space",
+        modifier
+            .element(key = Notifications.Elements.ShelfSpace)
+            .fillMaxWidth()
+            .onSizeChanged { size: IntSize ->
+                debugLog(viewModel) { "SHELF onSizeChanged: size=$size" }
+            }
+            .onPlaced { coordinates: LayoutCoordinates ->
+                debugLog(viewModel) {
+                    ("SHELF onPlaced:" +
+                        " size=${coordinates.size}" +
+                        " position=${coordinates.positionInWindow()}" +
+                        " bounds=${coordinates.boundsInWindow()}")
+                }
+            }
+            .clip(RoundedCornerShape(24.dp))
+            .background(MaterialTheme.colorScheme.primaryContainer)
+            .padding(16.dp),
+        style = MaterialTheme.typography.titleLarge,
+        color = MaterialTheme.colorScheme.onPrimaryContainer,
+    )
+}
+
+@Composable
+private fun SceneScope.NotificationPlaceholder(
+    viewModel: NotificationsPlaceholderViewModel,
+    form: Form,
+    modifier: Modifier = Modifier,
+) {
+    val key = Notifications.Elements.NotificationPlaceholder
+    Box(
         modifier =
             modifier
-                .element(key = Notifications.Elements.Notifications)
-                .fillMaxWidth()
-                .defaultMinSize(minHeight = 300.dp)
-                .clip(RoundedCornerShape(32.dp))
-                .background(MaterialTheme.colorScheme.surface)
-                .padding(16.dp),
+                .element(key)
+                .debugBackground(viewModel)
+                .onSizeChanged { size: IntSize ->
+                    debugLog(viewModel) { "STACK onSizeChanged: size=$size" }
+                }
+                .onPlaced { coordinates: LayoutCoordinates ->
+                    debugLog(viewModel) {
+                        "STACK onPlaced:" +
+                            " size=${coordinates.size}" +
+                            " position=${coordinates.positionInWindow()}" +
+                            " bounds=${coordinates.boundsInWindow()}"
+                    }
+                    val boundsInWindow = coordinates.boundsInWindow()
+                    viewModel.setPlaceholderPositionInWindow(
+                        top = boundsInWindow.top,
+                        bottom = boundsInWindow.bottom,
+                    )
+                }
     ) {
-        Text(
-            text = "Notifications",
-            modifier = Modifier.align(Alignment.CenterHorizontally),
-            style = MaterialTheme.typography.titleLarge,
-            color = MaterialTheme.colorScheme.onSurface,
-        )
-        Spacer(modifier = Modifier.weight(1f))
-        Text(
-            text = "Shelf",
-            modifier = Modifier.align(Alignment.CenterHorizontally),
-            style = MaterialTheme.typography.titleSmall,
-            color = MaterialTheme.colorScheme.onSurface,
-        )
+        val animatedExpansion by
+            animateSharedFloatAsState(
+                value = if (form == Form.HunFromTop) 0f else 1f,
+                key = SharedExpansionValue,
+                element = key
+            )
+        debugLog(viewModel) { "STACK composed: expansion=$animatedExpansion" }
+        if (viewModel.isPlaceholderTextVisible) {
+            Text(
+                text = "Notifications",
+                style = MaterialTheme.typography.titleLarge,
+                color = MaterialTheme.colorScheme.onSurface,
+                modifier = Modifier.align(Alignment.Center),
+            )
+        }
+    }
+}
+
+private inline fun debugLog(
+    viewModel: NotificationsPlaceholderViewModel,
+    msg: () -> Any,
+) {
+    if (viewModel.isDebugLoggingEnabled) {
+        Log.d(TAG, msg().toString())
     }
 }
+
+private fun Modifier.debugBackground(
+    viewModel: NotificationsPlaceholderViewModel,
+    color: Color = DEBUG_COLOR,
+): Modifier =
+    if (viewModel.isVisualDebuggingEnabled) {
+        background(color)
+    } else {
+        this
+    }
+
+private const val TAG = "FlexiNotifs"
+private val DEBUG_COLOR = Color(1f, 0f, 0f, 0.2f)
diff --git a/packages/SystemUI/compose/features/src/com/android/systemui/qs/ui/composable/QuickSettingsScene.kt b/packages/SystemUI/compose/features/src/com/android/systemui/qs/ui/composable/QuickSettingsScene.kt
index b9451d1c1585..9dd7bfaf3549 100644
--- a/packages/SystemUI/compose/features/src/com/android/systemui/qs/ui/composable/QuickSettingsScene.kt
+++ b/packages/SystemUI/compose/features/src/com/android/systemui/qs/ui/composable/QuickSettingsScene.kt
@@ -24,6 +24,7 @@ import androidx.compose.animation.fadeIn
 import androidx.compose.animation.fadeOut
 import androidx.compose.animation.shrinkVertically
 import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxHeight
@@ -43,6 +44,7 @@ import com.android.compose.windowsizeclass.LocalWindowSizeClass
 import com.android.systemui.battery.BatteryMeterViewController
 import com.android.systemui.dagger.SysUISingleton
 import com.android.systemui.dagger.qualifiers.Application
+import com.android.systemui.notifications.ui.composable.HeadsUpNotificationSpace
 import com.android.systemui.qs.ui.adapter.QSSceneAdapter
 import com.android.systemui.qs.ui.viewmodel.QuickSettingsSceneViewModel
 import com.android.systemui.scene.shared.model.SceneKey
@@ -101,53 +103,59 @@ private fun SceneScope.QuickSettingsScene(
     modifier: Modifier = Modifier,
 ) {
     // TODO(b/280887232): implement the real UI.
-    val isCustomizing by viewModel.qsSceneAdapter.isCustomizing.collectAsState()
-    val collapsedHeaderHeight =
-        with(LocalDensity.current) { ShadeHeader.Dimensions.CollapsedHeight.roundToPx() }
-    Column(
-        horizontalAlignment = Alignment.CenterHorizontally,
-        modifier =
-            modifier
-                .fillMaxSize()
-                .clickable(onClick = { viewModel.onContentClicked() })
-                .padding(start = 16.dp, end = 16.dp, bottom = 48.dp)
-    ) {
-        when (LocalWindowSizeClass.current.widthSizeClass) {
-            WindowWidthSizeClass.Compact ->
-                AnimatedVisibility(
-                    visible = !isCustomizing,
-                    enter =
-                        expandVertically(
-                            animationSpec = tween(1000),
-                            initialHeight = { collapsedHeaderHeight },
-                        ) + fadeIn(tween(1000)),
-                    exit =
-                        shrinkVertically(
-                            animationSpec = tween(1000),
-                            targetHeight = { collapsedHeaderHeight },
-                            shrinkTowards = Alignment.Top,
-                        ) + fadeOut(tween(1000)),
-                ) {
-                    ExpandedShadeHeader(
+    Box(modifier = modifier.fillMaxSize()) {
+        val isCustomizing by viewModel.qsSceneAdapter.isCustomizing.collectAsState()
+        val collapsedHeaderHeight =
+            with(LocalDensity.current) { ShadeHeader.Dimensions.CollapsedHeight.roundToPx() }
+        Column(
+            horizontalAlignment = Alignment.CenterHorizontally,
+            modifier =
+                Modifier.fillMaxSize()
+                    .clickable(onClick = { viewModel.onContentClicked() })
+                    .padding(start = 16.dp, end = 16.dp, bottom = 48.dp)
+        ) {
+            when (LocalWindowSizeClass.current.widthSizeClass) {
+                WindowWidthSizeClass.Compact ->
+                    AnimatedVisibility(
+                        visible = !isCustomizing,
+                        enter =
+                            expandVertically(
+                                animationSpec = tween(1000),
+                                initialHeight = { collapsedHeaderHeight },
+                            ) + fadeIn(tween(1000)),
+                        exit =
+                            shrinkVertically(
+                                animationSpec = tween(1000),
+                                targetHeight = { collapsedHeaderHeight },
+                                shrinkTowards = Alignment.Top,
+                            ) + fadeOut(tween(1000)),
+                    ) {
+                        ExpandedShadeHeader(
+                            viewModel = viewModel.shadeHeaderViewModel,
+                            createTintedIconManager = createTintedIconManager,
+                            createBatteryMeterViewController = createBatteryMeterViewController,
+                            statusBarIconController = statusBarIconController,
+                        )
+                    }
+                else ->
+                    CollapsedShadeHeader(
                         viewModel = viewModel.shadeHeaderViewModel,
                         createTintedIconManager = createTintedIconManager,
                         createBatteryMeterViewController = createBatteryMeterViewController,
                         statusBarIconController = statusBarIconController,
                     )
-                }
-            else ->
-                CollapsedShadeHeader(
-                    viewModel = viewModel.shadeHeaderViewModel,
-                    createTintedIconManager = createTintedIconManager,
-                    createBatteryMeterViewController = createBatteryMeterViewController,
-                    statusBarIconController = statusBarIconController,
-                )
+            }
+            Spacer(modifier = Modifier.height(16.dp))
+            QuickSettings(
+                modifier = Modifier.fillMaxHeight(),
+                viewModel.qsSceneAdapter,
+                QSSceneAdapter.State.QS
+            )
         }
-        Spacer(modifier = Modifier.height(16.dp))
-        QuickSettings(
-            modifier = Modifier.fillMaxHeight(),
-            viewModel.qsSceneAdapter,
-            QSSceneAdapter.State.QS
+        HeadsUpNotificationSpace(
+            viewModel = viewModel.notifications,
+            isPeekFromBottom = true,
+            modifier = Modifier.padding(16.dp).fillMaxSize(),
         )
     }
 }
diff --git a/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/GoneScene.kt b/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/GoneScene.kt
index f35ea8373db7..bded98d52481 100644
--- a/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/GoneScene.kt
+++ b/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/GoneScene.kt
@@ -17,15 +17,20 @@
 package com.android.systemui.scene.ui.composable
 
 import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
 import com.android.compose.animation.scene.SceneScope
 import com.android.systemui.dagger.SysUISingleton
+import com.android.systemui.notifications.ui.composable.HeadsUpNotificationSpace
 import com.android.systemui.scene.shared.model.Direction
 import com.android.systemui.scene.shared.model.Edge
 import com.android.systemui.scene.shared.model.SceneKey
 import com.android.systemui.scene.shared.model.SceneModel
 import com.android.systemui.scene.shared.model.UserAction
+import com.android.systemui.statusbar.notification.stack.ui.viewmodel.NotificationsPlaceholderViewModel
 import javax.inject.Inject
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -36,7 +41,11 @@ import kotlinx.coroutines.flow.asStateFlow
  * content from the scene framework.
  */
 @SysUISingleton
-class GoneScene @Inject constructor() : ComposableScene {
+class GoneScene
+@Inject
+constructor(
+    private val notificationsViewModel: NotificationsPlaceholderViewModel,
+) : ComposableScene {
     override val key = SceneKey.Gone
 
     override val destinationScenes: StateFlow<Map<UserAction, SceneModel>> =
@@ -56,6 +65,11 @@ class GoneScene @Inject constructor() : ComposableScene {
     override fun SceneScope.Content(
         modifier: Modifier,
     ) {
-        Box(modifier = modifier)
+        Box(modifier = modifier) {
+            HeadsUpNotificationSpace(
+                viewModel = notificationsViewModel,
+                modifier = Modifier.padding(16.dp).fillMaxSize(),
+            )
+        }
     }
 }
diff --git a/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/transitions/FromGoneToShadeTransition.kt b/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/transitions/FromGoneToShadeTransition.kt
index 45df2b1bb20c..6bb525aa00fb 100644
--- a/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/transitions/FromGoneToShadeTransition.kt
+++ b/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/transitions/FromGoneToShadeTransition.kt
@@ -3,10 +3,12 @@ package com.android.systemui.scene.ui.composable.transitions
 import androidx.compose.animation.core.tween
 import com.android.compose.animation.scene.Edge
 import com.android.compose.animation.scene.TransitionBuilder
+import com.android.systemui.notifications.ui.composable.Notifications
 import com.android.systemui.scene.ui.composable.Shade
 
 fun TransitionBuilder.goneToShadeTransition() {
     spec = tween(durationMillis = 500)
 
     translate(Shade.rootElementKey, Edge.Top, true)
+    fade(Notifications.Elements.NotificationScrim)
 }
diff --git a/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/transitions/FromLockscreenToShadeTransition.kt b/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/transitions/FromLockscreenToShadeTransition.kt
index fadbdce80cbf..b7f12f3b40bd 100644
--- a/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/transitions/FromLockscreenToShadeTransition.kt
+++ b/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/transitions/FromLockscreenToShadeTransition.kt
@@ -20,5 +20,5 @@ fun TransitionBuilder.lockscreenToShadeTransition() {
             startsOutsideLayoutBounds = false,
         )
     }
-    fractionRange(start = 0.5f) { fade(Notifications.Elements.Notifications) }
+    fractionRange(start = 0.5f) { fade(Notifications.Elements.NotificationScrim) }
 }
diff --git a/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/transitions/FromShadeToQuickSettingsTransition.kt b/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/transitions/FromShadeToQuickSettingsTransition.kt
index 5616175ed11c..d5c2a03b3f9f 100644
--- a/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/transitions/FromShadeToQuickSettingsTransition.kt
+++ b/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/transitions/FromShadeToQuickSettingsTransition.kt
@@ -10,7 +10,7 @@ import com.android.systemui.shade.ui.composable.ShadeHeader
 fun TransitionBuilder.shadeToQuickSettingsTransition() {
     spec = tween(durationMillis = 500)
 
-    translate(Notifications.Elements.Notifications, Edge.Bottom)
+    translate(Notifications.Elements.NotificationScrim, Edge.Bottom)
     timestampRange(endMillis = 83) { fade(QuickSettings.Elements.FooterActions) }
 
     translate(ShadeHeader.Elements.CollapsedContent, y = ShadeHeader.Dimensions.CollapsedHeight)
diff --git a/packages/SystemUI/compose/features/src/com/android/systemui/shade/ui/composable/ShadeScene.kt b/packages/SystemUI/compose/features/src/com/android/systemui/shade/ui/composable/ShadeScene.kt
index a02f046a18f5..2df151bc2d8e 100644
--- a/packages/SystemUI/compose/features/src/com/android/systemui/shade/ui/composable/ShadeScene.kt
+++ b/packages/SystemUI/compose/features/src/com/android/systemui/shade/ui/composable/ShadeScene.kt
@@ -37,7 +37,7 @@ import com.android.compose.animation.scene.SceneScope
 import com.android.systemui.battery.BatteryMeterViewController
 import com.android.systemui.dagger.SysUISingleton
 import com.android.systemui.dagger.qualifiers.Application
-import com.android.systemui.notifications.ui.composable.Notifications
+import com.android.systemui.notifications.ui.composable.NotificationStack
 import com.android.systemui.qs.ui.adapter.QSSceneAdapter
 import com.android.systemui.qs.ui.composable.QuickSettings
 import com.android.systemui.scene.shared.model.Direction
@@ -160,7 +160,11 @@ private fun SceneScope.ShadeScene(
                 QSSceneAdapter.State.QQS
             )
             Spacer(modifier = Modifier.height(16.dp))
-            Notifications(modifier = Modifier.weight(1f))
+            NotificationStack(
+                viewModel = viewModel.notifications,
+                isScrimVisible = true,
+                modifier = Modifier.weight(1f),
+            )
         }
     }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/common/shared/model/SharedNotificationContainerPosition.kt b/packages/SystemUI/src/com/android/systemui/common/shared/model/SharedNotificationContainerPosition.kt
index 48d374207388..48d3fe000ff8 100644
--- a/packages/SystemUI/src/com/android/systemui/common/shared/model/SharedNotificationContainerPosition.kt
+++ b/packages/SystemUI/src/com/android/systemui/common/shared/model/SharedNotificationContainerPosition.kt
@@ -23,4 +23,6 @@ data class SharedNotificationContainerPosition(
 
     /** Whether any modifications to top/bottom are smoothly animated */
     val animate: Boolean = false,
-)
+) {
+    val height: Float = bottom - top
+}
diff --git a/packages/SystemUI/src/com/android/systemui/keyguard/domain/interactor/KeyguardInteractor.kt b/packages/SystemUI/src/com/android/systemui/keyguard/domain/interactor/KeyguardInteractor.kt
index e256b49be8f8..949c940bdebc 100644
--- a/packages/SystemUI/src/com/android/systemui/keyguard/domain/interactor/KeyguardInteractor.kt
+++ b/packages/SystemUI/src/com/android/systemui/keyguard/domain/interactor/KeyguardInteractor.kt
@@ -56,6 +56,7 @@ import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.distinctUntilChanged
 import kotlinx.coroutines.flow.filter
@@ -83,10 +84,18 @@ constructor(
     shadeRepository: ShadeRepository,
     sceneInteractorProvider: Provider<SceneInteractor>,
 ) {
-    /** Position information for the shared notification container. */
-    val sharedNotificationContainerPosition =
+    // TODO(b/296118689): move to a repository
+    private val _sharedNotificationContainerPosition =
         MutableStateFlow(SharedNotificationContainerPosition())
 
+    /** Position information for the shared notification container. */
+    val sharedNotificationContainerPosition: StateFlow<SharedNotificationContainerPosition> =
+        _sharedNotificationContainerPosition.asStateFlow()
+
+    fun setSharedNotificationContainerPosition(position: SharedNotificationContainerPosition) {
+        _sharedNotificationContainerPosition.value = position
+    }
+
     /**
      * The amount of doze the system is in, where `1.0` is fully dozing and `0.0` is not dozing at
      * all.
diff --git a/packages/SystemUI/src/com/android/systemui/keyguard/ui/view/layout/sections/DefaultNotificationStackScrollLayoutSection.kt b/packages/SystemUI/src/com/android/systemui/keyguard/ui/view/layout/sections/DefaultNotificationStackScrollLayoutSection.kt
index 165ee364c2c8..5673f997d23d 100644
--- a/packages/SystemUI/src/com/android/systemui/keyguard/ui/view/layout/sections/DefaultNotificationStackScrollLayoutSection.kt
+++ b/packages/SystemUI/src/com/android/systemui/keyguard/ui/view/layout/sections/DefaultNotificationStackScrollLayoutSection.kt
@@ -29,10 +29,13 @@ import com.android.systemui.flags.Flags
 import com.android.systemui.keyguard.shared.KeyguardShadeMigrationNssl
 import com.android.systemui.keyguard.ui.viewmodel.KeyguardSmartspaceViewModel
 import com.android.systemui.res.R
+import com.android.systemui.scene.shared.flag.SceneContainerFlags
 import com.android.systemui.shade.NotificationPanelView
+import com.android.systemui.statusbar.notification.stack.AmbientState
 import com.android.systemui.statusbar.notification.stack.NotificationStackScrollLayoutController
 import com.android.systemui.statusbar.notification.stack.NotificationStackSizeCalculator
 import com.android.systemui.statusbar.notification.stack.ui.view.SharedNotificationContainer
+import com.android.systemui.statusbar.notification.stack.ui.viewmodel.NotificationStackAppearanceViewModel
 import com.android.systemui.statusbar.notification.stack.ui.viewmodel.SharedNotificationContainerViewModel
 import javax.inject.Inject
 
@@ -42,18 +45,24 @@ class DefaultNotificationStackScrollLayoutSection
 constructor(
     context: Context,
     private val featureFlags: FeatureFlags,
+    sceneContainerFlags: SceneContainerFlags,
     notificationPanelView: NotificationPanelView,
     sharedNotificationContainer: SharedNotificationContainer,
     sharedNotificationContainerViewModel: SharedNotificationContainerViewModel,
+    notificationStackAppearanceViewModel: NotificationStackAppearanceViewModel,
+    ambientState: AmbientState,
     controller: NotificationStackScrollLayoutController,
     notificationStackSizeCalculator: NotificationStackSizeCalculator,
     private val smartspaceViewModel: KeyguardSmartspaceViewModel,
 ) :
     NotificationStackScrollLayoutSection(
         context,
+        sceneContainerFlags,
         notificationPanelView,
         sharedNotificationContainer,
         sharedNotificationContainerViewModel,
+        notificationStackAppearanceViewModel,
+        ambientState,
         controller,
         notificationStackSizeCalculator,
     ) {
diff --git a/packages/SystemUI/src/com/android/systemui/keyguard/ui/view/layout/sections/NotificationStackScrollLayoutSection.kt b/packages/SystemUI/src/com/android/systemui/keyguard/ui/view/layout/sections/NotificationStackScrollLayoutSection.kt
index 441f59d6df1d..a9e766e5f98d 100644
--- a/packages/SystemUI/src/com/android/systemui/keyguard/ui/view/layout/sections/NotificationStackScrollLayoutSection.kt
+++ b/packages/SystemUI/src/com/android/systemui/keyguard/ui/view/layout/sections/NotificationStackScrollLayoutSection.kt
@@ -24,20 +24,28 @@ import androidx.constraintlayout.widget.ConstraintLayout
 import com.android.systemui.keyguard.shared.KeyguardShadeMigrationNssl
 import com.android.systemui.keyguard.shared.model.KeyguardSection
 import com.android.systemui.res.R
+import com.android.systemui.scene.shared.flag.SceneContainerFlags
 import com.android.systemui.shade.NotificationPanelView
+import com.android.systemui.statusbar.notification.stack.AmbientState
 import com.android.systemui.statusbar.notification.stack.NotificationStackScrollLayoutController
 import com.android.systemui.statusbar.notification.stack.NotificationStackSizeCalculator
+import com.android.systemui.statusbar.notification.stack.shared.flexiNotifsEnabled
 import com.android.systemui.statusbar.notification.stack.ui.view.SharedNotificationContainer
+import com.android.systemui.statusbar.notification.stack.ui.viewbinder.NotificationStackAppearanceViewBinder
 import com.android.systemui.statusbar.notification.stack.ui.viewbinder.SharedNotificationContainerBinder
+import com.android.systemui.statusbar.notification.stack.ui.viewmodel.NotificationStackAppearanceViewModel
 import com.android.systemui.statusbar.notification.stack.ui.viewmodel.SharedNotificationContainerViewModel
 import kotlinx.coroutines.DisposableHandle
 
 abstract class NotificationStackScrollLayoutSection
 constructor(
     protected val context: Context,
+    private val sceneContainerFlags: SceneContainerFlags,
     private val notificationPanelView: NotificationPanelView,
     private val sharedNotificationContainer: SharedNotificationContainer,
     private val sharedNotificationContainerViewModel: SharedNotificationContainerViewModel,
+    private val notificationStackAppearanceViewModel: NotificationStackAppearanceViewModel,
+    private val ambientState: AmbientState,
     private val controller: NotificationStackScrollLayoutController,
     private val notificationStackSizeCalculator: NotificationStackSizeCalculator,
 ) : KeyguardSection() {
@@ -68,9 +76,19 @@ constructor(
             SharedNotificationContainerBinder.bind(
                 sharedNotificationContainer,
                 sharedNotificationContainerViewModel,
+                sceneContainerFlags,
                 controller,
                 notificationStackSizeCalculator,
             )
+        if (sceneContainerFlags.flexiNotifsEnabled()) {
+            NotificationStackAppearanceViewBinder.bind(
+                sharedNotificationContainer,
+                notificationStackAppearanceViewModel,
+                sceneContainerFlags,
+                ambientState,
+                controller,
+            )
+        }
     }
 
     override fun removeViews(constraintLayout: ConstraintLayout) {
diff --git a/packages/SystemUI/src/com/android/systemui/keyguard/ui/view/layout/sections/SplitShadeNotificationStackScrollLayoutSection.kt b/packages/SystemUI/src/com/android/systemui/keyguard/ui/view/layout/sections/SplitShadeNotificationStackScrollLayoutSection.kt
index 2c45da63edb4..ab68ecd920ff 100644
--- a/packages/SystemUI/src/com/android/systemui/keyguard/ui/view/layout/sections/SplitShadeNotificationStackScrollLayoutSection.kt
+++ b/packages/SystemUI/src/com/android/systemui/keyguard/ui/view/layout/sections/SplitShadeNotificationStackScrollLayoutSection.kt
@@ -29,10 +29,13 @@ import com.android.systemui.flags.Flags
 import com.android.systemui.keyguard.shared.KeyguardShadeMigrationNssl
 import com.android.systemui.keyguard.ui.viewmodel.KeyguardSmartspaceViewModel
 import com.android.systemui.res.R
+import com.android.systemui.scene.shared.flag.SceneContainerFlags
 import com.android.systemui.shade.NotificationPanelView
+import com.android.systemui.statusbar.notification.stack.AmbientState
 import com.android.systemui.statusbar.notification.stack.NotificationStackScrollLayoutController
 import com.android.systemui.statusbar.notification.stack.NotificationStackSizeCalculator
 import com.android.systemui.statusbar.notification.stack.ui.view.SharedNotificationContainer
+import com.android.systemui.statusbar.notification.stack.ui.viewmodel.NotificationStackAppearanceViewModel
 import com.android.systemui.statusbar.notification.stack.ui.viewmodel.SharedNotificationContainerViewModel
 import javax.inject.Inject
 
@@ -42,18 +45,24 @@ class SplitShadeNotificationStackScrollLayoutSection
 constructor(
     context: Context,
     private val featureFlags: FeatureFlags,
+    sceneContainerFlags: SceneContainerFlags,
     notificationPanelView: NotificationPanelView,
     sharedNotificationContainer: SharedNotificationContainer,
     sharedNotificationContainerViewModel: SharedNotificationContainerViewModel,
+    notificationStackAppearanceViewModel: NotificationStackAppearanceViewModel,
+    ambientState: AmbientState,
     controller: NotificationStackScrollLayoutController,
     notificationStackSizeCalculator: NotificationStackSizeCalculator,
     private val smartspaceViewModel: KeyguardSmartspaceViewModel,
 ) :
     NotificationStackScrollLayoutSection(
         context,
+        sceneContainerFlags,
         notificationPanelView,
         sharedNotificationContainer,
         sharedNotificationContainerViewModel,
+        notificationStackAppearanceViewModel,
+        ambientState,
         controller,
         notificationStackSizeCalculator,
     ) {
diff --git a/packages/SystemUI/src/com/android/systemui/keyguard/ui/viewmodel/KeyguardRootViewModel.kt b/packages/SystemUI/src/com/android/systemui/keyguard/ui/viewmodel/KeyguardRootViewModel.kt
index 60f75f03609c..56cbd36f8cc5 100644
--- a/packages/SystemUI/src/com/android/systemui/keyguard/ui/viewmodel/KeyguardRootViewModel.kt
+++ b/packages/SystemUI/src/com/android/systemui/keyguard/ui/viewmodel/KeyguardRootViewModel.kt
@@ -49,6 +49,7 @@ import javax.inject.Provider
 import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.distinctUntilChanged
 import kotlinx.coroutines.flow.filter
@@ -99,6 +100,10 @@ constructor(
 
     val goneToAodTransition = keyguardTransitionInteractor.goneToAodTransition
 
+    /** the shared notification container position *on the lockscreen* */
+    val notificationPositionOnLockscreen: StateFlow<SharedNotificationContainerPosition>
+        get() = keyguardInteractor.sharedNotificationContainerPosition
+
     /** An observable for the alpha level for the entire keyguard root view. */
     val alpha: Flow<Float> =
         previewMode.flatMapLatest {
@@ -249,8 +254,9 @@ constructor(
         if (previewMode.value.isInPreviewMode) {
             return
         }
-        keyguardInteractor.sharedNotificationContainerPosition.value =
+        keyguardInteractor.setSharedNotificationContainerPosition(
             SharedNotificationContainerPosition(top, bottom)
+        )
     }
 
     /** Is there an expanded pulse, are we animating in response? */
diff --git a/packages/SystemUI/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenSceneViewModel.kt b/packages/SystemUI/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenSceneViewModel.kt
index c03e4d950cae..539db7fb1ae3 100644
--- a/packages/SystemUI/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenSceneViewModel.kt
+++ b/packages/SystemUI/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenSceneViewModel.kt
@@ -21,6 +21,7 @@ import com.android.systemui.dagger.SysUISingleton
 import com.android.systemui.dagger.qualifiers.Application
 import com.android.systemui.deviceentry.domain.interactor.DeviceEntryInteractor
 import com.android.systemui.scene.shared.model.SceneKey
+import com.android.systemui.statusbar.notification.stack.ui.viewmodel.NotificationsPlaceholderViewModel
 import javax.inject.Inject
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.flow.SharingStarted
@@ -37,6 +38,8 @@ constructor(
     deviceEntryInteractor: DeviceEntryInteractor,
     communalInteractor: CommunalInteractor,
     val longPress: KeyguardLongPressViewModel,
+    val keyguardRoot: KeyguardRootViewModel,
+    val notifications: NotificationsPlaceholderViewModel,
 ) {
     /** The key of the scene we should switch to when swiping up. */
     val upDestinationSceneKey: StateFlow<SceneKey> =
diff --git a/packages/SystemUI/src/com/android/systemui/qs/ui/viewmodel/QuickSettingsSceneViewModel.kt b/packages/SystemUI/src/com/android/systemui/qs/ui/viewmodel/QuickSettingsSceneViewModel.kt
index 3941fd75ebaa..346d5c30a63e 100644
--- a/packages/SystemUI/src/com/android/systemui/qs/ui/viewmodel/QuickSettingsSceneViewModel.kt
+++ b/packages/SystemUI/src/com/android/systemui/qs/ui/viewmodel/QuickSettingsSceneViewModel.kt
@@ -24,6 +24,7 @@ import com.android.systemui.scene.shared.model.SceneKey
 import com.android.systemui.scene.shared.model.SceneModel
 import com.android.systemui.scene.shared.model.UserAction
 import com.android.systemui.shade.ui.viewmodel.ShadeHeaderViewModel
+import com.android.systemui.statusbar.notification.stack.ui.viewmodel.NotificationsPlaceholderViewModel
 import javax.inject.Inject
 import kotlinx.coroutines.flow.map
 
@@ -35,6 +36,7 @@ constructor(
     private val deviceEntryInteractor: DeviceEntryInteractor,
     val shadeHeaderViewModel: ShadeHeaderViewModel,
     val qsSceneAdapter: QSSceneAdapter,
+    val notifications: NotificationsPlaceholderViewModel,
 ) {
     /** Notifies that some content in quick settings was clicked. */
     fun onContentClicked() = deviceEntryInteractor.attemptDeviceEntry()
diff --git a/packages/SystemUI/src/com/android/systemui/scene/domain/startable/SceneContainerStartable.kt b/packages/SystemUI/src/com/android/systemui/scene/domain/startable/SceneContainerStartable.kt
index 8def457423e4..f3f9c916d705 100644
--- a/packages/SystemUI/src/com/android/systemui/scene/domain/startable/SceneContainerStartable.kt
+++ b/packages/SystemUI/src/com/android/systemui/scene/domain/startable/SceneContainerStartable.kt
@@ -97,6 +97,7 @@ constructor(
     /** Updates the visibility of the scene container. */
     private fun hydrateVisibility() {
         applicationScope.launch {
+            // TODO(b/296114544): Combine with some global hun state to make it visible!
             sceneInteractor.transitionState
                 .mapNotNull { state ->
                     when (state) {
diff --git a/packages/SystemUI/src/com/android/systemui/scene/ui/view/SceneWindowRootView.kt b/packages/SystemUI/src/com/android/systemui/scene/ui/view/SceneWindowRootView.kt
index 7fc409445f50..c88a04c24044 100644
--- a/packages/SystemUI/src/com/android/systemui/scene/ui/view/SceneWindowRootView.kt
+++ b/packages/SystemUI/src/com/android/systemui/scene/ui/view/SceneWindowRootView.kt
@@ -4,9 +4,11 @@ import android.content.Context
 import android.util.AttributeSet
 import android.view.View
 import android.view.WindowInsets
+import com.android.systemui.scene.shared.flag.SceneContainerFlags
 import com.android.systemui.scene.shared.model.Scene
 import com.android.systemui.scene.shared.model.SceneContainerConfig
 import com.android.systemui.scene.ui.viewmodel.SceneContainerViewModel
+import com.android.systemui.statusbar.notification.stack.ui.view.SharedNotificationContainer
 import kotlinx.coroutines.flow.MutableStateFlow
 
 /** A root view of the main SysUI window that supports scenes. */
@@ -27,6 +29,8 @@ class SceneWindowRootView(
     fun init(
         viewModel: SceneContainerViewModel,
         containerConfig: SceneContainerConfig,
+        sharedNotificationContainer: SharedNotificationContainer,
+        flags: SceneContainerFlags,
         scenes: Set<Scene>,
         layoutInsetController: LayoutInsetsController,
     ) {
@@ -37,6 +41,8 @@ class SceneWindowRootView(
             viewModel = viewModel,
             windowInsets = windowInsets,
             containerConfig = containerConfig,
+            sharedNotificationContainer = sharedNotificationContainer,
+            flags = flags,
             scenes = scenes,
             onVisibilityChangedInternal = { isVisible ->
                 super.setVisibility(if (isVisible) View.VISIBLE else View.INVISIBLE)
diff --git a/packages/SystemUI/src/com/android/systemui/scene/ui/view/SceneWindowRootViewBinder.kt b/packages/SystemUI/src/com/android/systemui/scene/ui/view/SceneWindowRootViewBinder.kt
index 17d6c9d319e8..4a839b8df9ba 100644
--- a/packages/SystemUI/src/com/android/systemui/scene/ui/view/SceneWindowRootViewBinder.kt
+++ b/packages/SystemUI/src/com/android/systemui/scene/ui/view/SceneWindowRootViewBinder.kt
@@ -31,10 +31,13 @@ import androidx.lifecycle.repeatOnLifecycle
 import com.android.systemui.compose.ComposeFacade
 import com.android.systemui.lifecycle.repeatWhenAttached
 import com.android.systemui.res.R
+import com.android.systemui.scene.shared.flag.SceneContainerFlags
 import com.android.systemui.scene.shared.model.Scene
 import com.android.systemui.scene.shared.model.SceneContainerConfig
 import com.android.systemui.scene.shared.model.SceneKey
 import com.android.systemui.scene.ui.viewmodel.SceneContainerViewModel
+import com.android.systemui.statusbar.notification.stack.shared.flexiNotifsEnabled
+import com.android.systemui.statusbar.notification.stack.ui.view.SharedNotificationContainer
 import java.time.Instant
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.launch
@@ -47,6 +50,8 @@ object SceneWindowRootViewBinder {
         viewModel: SceneContainerViewModel,
         windowInsets: StateFlow<WindowInsets?>,
         containerConfig: SceneContainerConfig,
+        sharedNotificationContainer: SharedNotificationContainer,
+        flags: SceneContainerFlags,
         scenes: Set<Scene>,
         onVisibilityChangedInternal: (isVisible: Boolean) -> Unit,
     ) {
@@ -91,6 +96,13 @@ object SceneWindowRootViewBinder {
                     val legacyView = view.requireViewById<View>(R.id.legacy_window_root)
                     view.addView(createVisibilityToggleView(legacyView))
 
+                    if (flags.flexiNotifsEnabled()) {
+                        (sharedNotificationContainer.parent as? ViewGroup)?.removeView(
+                            sharedNotificationContainer
+                        )
+                        view.addView(sharedNotificationContainer)
+                    }
+
                     launch {
                         viewModel.isVisible.collect { isVisible ->
                             onVisibilityChangedInternal(isVisible)
diff --git a/packages/SystemUI/src/com/android/systemui/shade/ShadeViewProviderModule.kt b/packages/SystemUI/src/com/android/systemui/shade/ShadeViewProviderModule.kt
index 37073a6b5a50..e5657d334ff6 100644
--- a/packages/SystemUI/src/com/android/systemui/shade/ShadeViewProviderModule.kt
+++ b/packages/SystemUI/src/com/android/systemui/shade/ShadeViewProviderModule.kt
@@ -68,6 +68,7 @@ abstract class ShadeViewProviderModule {
             sceneContainerFlags: SceneContainerFlags,
             viewModelProvider: Provider<SceneContainerViewModel>,
             containerConfigProvider: Provider<SceneContainerConfig>,
+            flagsProvider: Provider<SceneContainerFlags>,
             scenesProvider: Provider<Set<@JvmSuppressWildcards Scene>>,
             layoutInsetController: NotificationInsetsController,
         ): WindowRootView {
@@ -77,6 +78,9 @@ abstract class ShadeViewProviderModule {
                 sceneWindowRootView.init(
                     viewModel = viewModelProvider.get(),
                     containerConfig = containerConfigProvider.get(),
+                    sharedNotificationContainer =
+                        sceneWindowRootView.requireViewById(R.id.shared_notification_container),
+                    flags = flagsProvider.get(),
                     scenes = scenesProvider.get(),
                     layoutInsetController = layoutInsetController,
                 )
diff --git a/packages/SystemUI/src/com/android/systemui/shade/ui/viewmodel/ShadeSceneViewModel.kt b/packages/SystemUI/src/com/android/systemui/shade/ui/viewmodel/ShadeSceneViewModel.kt
index af880816914f..2a071def083a 100644
--- a/packages/SystemUI/src/com/android/systemui/shade/ui/viewmodel/ShadeSceneViewModel.kt
+++ b/packages/SystemUI/src/com/android/systemui/shade/ui/viewmodel/ShadeSceneViewModel.kt
@@ -21,12 +21,13 @@ import com.android.systemui.dagger.qualifiers.Application
 import com.android.systemui.deviceentry.domain.interactor.DeviceEntryInteractor
 import com.android.systemui.qs.ui.adapter.QSSceneAdapter
 import com.android.systemui.scene.shared.model.SceneKey
+import com.android.systemui.statusbar.notification.stack.ui.viewmodel.NotificationsPlaceholderViewModel
+import javax.inject.Inject
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.stateIn
-import javax.inject.Inject
 
 /** Models UI state and handles user input for the shade scene. */
 @SysUISingleton
@@ -37,6 +38,7 @@ constructor(
     private val deviceEntryInteractor: DeviceEntryInteractor,
     val qsSceneAdapter: QSSceneAdapter,
     val shadeHeaderViewModel: ShadeHeaderViewModel,
+    val notifications: NotificationsPlaceholderViewModel,
 ) {
     /** The key of the scene we should switch to when swiping up. */
     val upDestinationSceneKey: StateFlow<SceneKey> =
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/data/repository/NotificationStackAppearanceRepository.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/data/repository/NotificationStackAppearanceRepository.kt
new file mode 100644
index 000000000000..7c10663bbb50
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/data/repository/NotificationStackAppearanceRepository.kt
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package com.android.systemui.statusbar.notification.stack.data.repository
+
+import com.android.systemui.common.shared.model.SharedNotificationContainerPosition
+import com.android.systemui.dagger.SysUISingleton
+import javax.inject.Inject
+import kotlinx.coroutines.flow.MutableStateFlow
+
+/** A repository which holds state about and controlling the appearance of the NSSL */
+@SysUISingleton
+class NotificationStackAppearanceRepository @Inject constructor() {
+    /** The position of the notification stack in the current scene */
+    val stackPosition = MutableStateFlow(SharedNotificationContainerPosition(0f, 0f))
+}
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/domain/interactor/NotificationStackAppearanceInteractor.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/domain/interactor/NotificationStackAppearanceInteractor.kt
new file mode 100644
index 000000000000..820fe0b1f11e
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/domain/interactor/NotificationStackAppearanceInteractor.kt
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package com.android.systemui.statusbar.notification.stack.domain.interactor
+
+import com.android.systemui.common.shared.model.SharedNotificationContainerPosition
+import com.android.systemui.dagger.SysUISingleton
+import com.android.systemui.statusbar.notification.stack.data.repository.NotificationStackAppearanceRepository
+import javax.inject.Inject
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+
+/** An interactor which controls the appearance of the NSSL */
+@SysUISingleton
+class NotificationStackAppearanceInteractor
+@Inject
+constructor(
+    private val repository: NotificationStackAppearanceRepository,
+) {
+    /** The position of the notification stack in the current scene */
+    val stackPosition: StateFlow<SharedNotificationContainerPosition>
+        get() = repository.stackPosition.asStateFlow()
+
+    /** Sets the position of the notification stack in the current scene */
+    fun setStackPosition(position: SharedNotificationContainerPosition) {
+        check(position.top <= position.bottom) { "Invalid position: $position" }
+        repository.stackPosition.value = position
+    }
+}
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/shared/SceneContainerFlagsExtension.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/shared/SceneContainerFlagsExtension.kt
new file mode 100644
index 000000000000..5a71bd6fa116
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/shared/SceneContainerFlagsExtension.kt
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.systemui.statusbar.notification.stack.shared
+
+import com.android.systemui.scene.shared.flag.SceneContainerFlags
+
+private const val FLEXI_NOTIFS = false
+
+/**
+ * Returns whether flexiglass is displaying notifications, which is currently an optional piece of
+ * flexiglass
+ */
+fun SceneContainerFlags.flexiNotifsEnabled() = FLEXI_NOTIFS && isEnabled()
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewbinder/NotificationStackAppearanceViewBinder.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewbinder/NotificationStackAppearanceViewBinder.kt
new file mode 100644
index 000000000000..4d6a6ee98b7d
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewbinder/NotificationStackAppearanceViewBinder.kt
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.systemui.statusbar.notification.stack.ui.viewbinder
+
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.repeatOnLifecycle
+import com.android.systemui.lifecycle.repeatWhenAttached
+import com.android.systemui.scene.shared.flag.SceneContainerFlags
+import com.android.systemui.statusbar.notification.stack.AmbientState
+import com.android.systemui.statusbar.notification.stack.NotificationStackScrollLayoutController
+import com.android.systemui.statusbar.notification.stack.ui.view.SharedNotificationContainer
+import com.android.systemui.statusbar.notification.stack.ui.viewmodel.NotificationStackAppearanceViewModel
+import kotlinx.coroutines.launch
+
+/** Binds the shared notification container to its view-model. */
+object NotificationStackAppearanceViewBinder {
+
+    @JvmStatic
+    fun bind(
+        view: SharedNotificationContainer,
+        viewModel: NotificationStackAppearanceViewModel,
+        sceneContainerFlags: SceneContainerFlags,
+        ambientState: AmbientState,
+        controller: NotificationStackScrollLayoutController,
+    ) {
+        view.repeatWhenAttached {
+            repeatOnLifecycle(Lifecycle.State.CREATED) {
+                launch {
+                    viewModel.stackPosition.collect {
+                        controller.updateTopPadding(
+                            it.top,
+                            controller.isAddOrRemoveAnimationPending
+                        )
+                    }
+                }
+                launch {
+                    viewModel.expandFraction.collect {
+                        ambientState.expansionFraction = it
+                        controller.expandedHeight = it * controller.view.height
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewbinder/SharedNotificationContainerBinder.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewbinder/SharedNotificationContainerBinder.kt
index 0ff1bec84d16..44006fc3fd4e 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewbinder/SharedNotificationContainerBinder.kt
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewbinder/SharedNotificationContainerBinder.kt
@@ -19,8 +19,10 @@ package com.android.systemui.statusbar.notification.stack.ui.viewbinder
 import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.repeatOnLifecycle
 import com.android.systemui.lifecycle.repeatWhenAttached
+import com.android.systemui.scene.shared.flag.SceneContainerFlags
 import com.android.systemui.statusbar.notification.stack.NotificationStackScrollLayoutController
 import com.android.systemui.statusbar.notification.stack.NotificationStackSizeCalculator
+import com.android.systemui.statusbar.notification.stack.shared.flexiNotifsEnabled
 import com.android.systemui.statusbar.notification.stack.ui.view.SharedNotificationContainer
 import com.android.systemui.statusbar.notification.stack.ui.viewmodel.SharedNotificationContainerViewModel
 import kotlinx.coroutines.DisposableHandle
@@ -33,6 +35,7 @@ object SharedNotificationContainerBinder {
     fun bind(
         view: SharedNotificationContainer,
         viewModel: SharedNotificationContainerViewModel,
+        sceneContainerFlags: SceneContainerFlags,
         controller: NotificationStackScrollLayoutController,
         notificationStackSizeCalculator: NotificationStackSizeCalculator,
     ): DisposableHandle {
@@ -68,10 +71,12 @@ object SharedNotificationContainerBinder {
                             .collect { controller.setMaxDisplayedNotifications(it) }
                     }
 
-                    launch {
-                        viewModel.position.collect {
-                            val animate = it.animate || controller.isAddOrRemoveAnimationPending()
-                            controller.updateTopPadding(it.top, animate)
+                    if (!sceneContainerFlags.flexiNotifsEnabled()) {
+                        launch {
+                            viewModel.position.collect {
+                                val animate = it.animate || controller.isAddOrRemoveAnimationPending
+                                controller.updateTopPadding(it.top, animate)
+                            }
                         }
                     }
 
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/NotificationStackAppearanceViewModel.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/NotificationStackAppearanceViewModel.kt
new file mode 100644
index 000000000000..b86993486097
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/NotificationStackAppearanceViewModel.kt
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package com.android.systemui.statusbar.notification.stack.ui.viewmodel
+
+import com.android.systemui.common.shared.model.SharedNotificationContainerPosition
+import com.android.systemui.dagger.SysUISingleton
+import com.android.systemui.shade.domain.interactor.ShadeInteractor
+import com.android.systemui.statusbar.notification.stack.domain.interactor.NotificationStackAppearanceInteractor
+import javax.inject.Inject
+import kotlinx.coroutines.flow.Flow
+
+/** ViewModel which represents the state of the NSSL/Controller in the world of flexiglass */
+@SysUISingleton
+class NotificationStackAppearanceViewModel
+@Inject
+constructor(
+    stackAppearanceInteractor: NotificationStackAppearanceInteractor,
+    shadeInteractor: ShadeInteractor,
+) {
+    /** The expansion fraction from the top of the notification shade */
+    val expandFraction: Flow<Float> = shadeInteractor.shadeExpansion
+
+    /** The position of the notification stack in the current scene */
+    val stackPosition: Flow<SharedNotificationContainerPosition> =
+        stackAppearanceInteractor.stackPosition
+}
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/NotificationsPlaceholderViewModel.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/NotificationsPlaceholderViewModel.kt
new file mode 100644
index 000000000000..7def6feedb41
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/NotificationsPlaceholderViewModel.kt
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.systemui.statusbar.notification.stack.ui.viewmodel
+
+import com.android.systemui.common.shared.model.SharedNotificationContainerPosition
+import com.android.systemui.dagger.SysUISingleton
+import com.android.systemui.flags.FeatureFlagsClassic
+import com.android.systemui.flags.Flags
+import com.android.systemui.scene.shared.flag.SceneContainerFlags
+import com.android.systemui.statusbar.notification.stack.domain.interactor.NotificationStackAppearanceInteractor
+import com.android.systemui.statusbar.notification.stack.shared.flexiNotifsEnabled
+import javax.inject.Inject
+
+/**
+ * ViewModel used by the Notification placeholders inside the scene container to update the
+ * [NotificationStackAppearanceInteractor], and by extension control the NSSL.
+ */
+@SysUISingleton
+class NotificationsPlaceholderViewModel
+@Inject
+constructor(
+    private val interactor: NotificationStackAppearanceInteractor,
+    flags: SceneContainerFlags,
+    featureFlags: FeatureFlagsClassic,
+) {
+    /** DEBUG: whether the placeholder "Notifications" text should be shown. */
+    val isPlaceholderTextVisible: Boolean = !flags.flexiNotifsEnabled()
+
+    /** DEBUG: whether the placeholder should be made slightly visible for positional debugging. */
+    val isVisualDebuggingEnabled: Boolean = featureFlags.isEnabled(Flags.NSSL_DEBUG_LINES)
+
+    /** DEBUG: whether the debug logging should be output. */
+    val isDebugLoggingEnabled: Boolean = flags.flexiNotifsEnabled()
+
+    /** Sets the position of the notification stack in the current scene */
+    fun setPlaceholderPositionInWindow(top: Float, bottom: Float) {
+        interactor.setStackPosition(SharedNotificationContainerPosition(top, bottom))
+    }
+}
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/SharedNotificationContainerViewModel.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/SharedNotificationContainerViewModel.kt
index d6b6f75b3186..296ea884e5c3 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/SharedNotificationContainerViewModel.kt
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/SharedNotificationContainerViewModel.kt
@@ -18,6 +18,7 @@
 package com.android.systemui.statusbar.notification.stack.ui.viewmodel
 
 import com.android.systemui.common.shared.model.SharedNotificationContainerPosition
+import com.android.systemui.dagger.qualifiers.Application
 import com.android.systemui.keyguard.domain.interactor.KeyguardInteractor
 import com.android.systemui.keyguard.domain.interactor.KeyguardTransitionInteractor
 import com.android.systemui.keyguard.shared.model.KeyguardState
@@ -25,7 +26,10 @@ import com.android.systemui.shade.domain.interactor.ShadeInteractor
 import com.android.systemui.statusbar.notification.stack.domain.interactor.SharedNotificationContainerInteractor
 import com.android.systemui.util.kotlin.sample
 import javax.inject.Inject
+import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.combineTransform
 import kotlinx.coroutines.flow.distinctUntilChanged
@@ -33,12 +37,14 @@ import kotlinx.coroutines.flow.flatMapLatest
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.merge
 import kotlinx.coroutines.flow.onStart
+import kotlinx.coroutines.flow.stateIn
 
 /** View-model for the shared notification container, used by both the shade and keyguard spaces */
 class SharedNotificationContainerViewModel
 @Inject
 constructor(
     private val interactor: SharedNotificationContainerInteractor,
+    @Application applicationScope: CoroutineScope,
     keyguardInteractor: KeyguardInteractor,
     keyguardTransitionInteractor: KeyguardTransitionInteractor,
     private val shadeInteractor: ShadeInteractor,
@@ -103,32 +109,38 @@ constructor(
      *
      * When the shade is expanding, the position is controlled by... the shade.
      */
-    val position: Flow<SharedNotificationContainerPosition> =
-        isOnLockscreenWithoutShade.flatMapLatest { onLockscreen ->
-            if (onLockscreen) {
-                combine(
-                    keyguardInteractor.sharedNotificationContainerPosition,
-                    configurationBasedDimensions
-                ) { position, config ->
-                    if (config.useSplitShade) {
-                        position.copy(top = 0f)
-                    } else {
-                        position
+    val position: StateFlow<SharedNotificationContainerPosition> =
+        isOnLockscreenWithoutShade
+            .flatMapLatest { onLockscreen ->
+                if (onLockscreen) {
+                    combine(
+                        keyguardInteractor.sharedNotificationContainerPosition,
+                        configurationBasedDimensions
+                    ) { position, config ->
+                        if (config.useSplitShade) {
+                            position.copy(top = 0f)
+                        } else {
+                            position
+                        }
+                    }
+                } else {
+                    interactor.topPosition.sample(shadeInteractor.qsExpansion, ::Pair).map {
+                        (top, qsExpansion) ->
+                        // When QS expansion > 0, it should directly set the top padding so do not
+                        // animate it
+                        val animate = qsExpansion == 0f
+                        keyguardInteractor.sharedNotificationContainerPosition.value.copy(
+                            top = top,
+                            animate = animate
+                        )
                     }
-                }
-            } else {
-                interactor.topPosition.sample(shadeInteractor.qsExpansion, ::Pair).map {
-                    (top, qsExpansion) ->
-                    // When QS expansion > 0, it should directly set the top padding so do not
-                    // animate it
-                    val animate = qsExpansion == 0f
-                    keyguardInteractor.sharedNotificationContainerPosition.value.copy(
-                        top = top,
-                        animate = animate
-                    )
                 }
             }
-        }
+            .stateIn(
+                scope = applicationScope,
+                started = SharingStarted.WhileSubscribed(),
+                initialValue = SharedNotificationContainerPosition(0f, 0f),
+            )
 
     /**
      * Under certain scenarios, such as swiping up on the lockscreen, the container will need to be
diff --git a/packages/SystemUI/tests/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenSceneViewModelTest.kt b/packages/SystemUI/tests/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenSceneViewModelTest.kt
index 0b3bc9daa8b7..d07836d3abce 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenSceneViewModelTest.kt
+++ b/packages/SystemUI/tests/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenSceneViewModelTest.kt
@@ -94,6 +94,8 @@ class LockscreenSceneViewModelTest : SysuiTestCase() {
                 KeyguardLongPressViewModel(
                     interactor = mock(),
                 ),
+            keyguardRoot = utils.keyguardRootViewModel(),
+            notifications = utils.notificationsPlaceholderViewModel(),
         )
     }
 }
diff --git a/packages/SystemUI/tests/src/com/android/systemui/qs/ui/viewmodel/QuickSettingsSceneViewModelTest.kt b/packages/SystemUI/tests/src/com/android/systemui/qs/ui/viewmodel/QuickSettingsSceneViewModelTest.kt
index ef129c85ed37..5c325ae67369 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/qs/ui/viewmodel/QuickSettingsSceneViewModelTest.kt
+++ b/packages/SystemUI/tests/src/com/android/systemui/qs/ui/viewmodel/QuickSettingsSceneViewModelTest.kt
@@ -101,6 +101,7 @@ class QuickSettingsSceneViewModelTest : SysuiTestCase() {
                     ),
                 shadeHeaderViewModel = shadeHeaderViewModel,
                 qsSceneAdapter = qsFlexiglassAdapter,
+                notifications = utils.notificationsPlaceholderViewModel(),
             )
     }
 
diff --git a/packages/SystemUI/tests/src/com/android/systemui/scene/SceneFrameworkIntegrationTest.kt b/packages/SystemUI/tests/src/com/android/systemui/scene/SceneFrameworkIntegrationTest.kt
index 6a054cd9aff7..c3294ff2e26c 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/scene/SceneFrameworkIntegrationTest.kt
+++ b/packages/SystemUI/tests/src/com/android/systemui/scene/SceneFrameworkIntegrationTest.kt
@@ -152,6 +152,8 @@ class SceneFrameworkIntegrationTest : SysuiTestCase() {
                 KeyguardLongPressViewModel(
                     interactor = mock(),
                 ),
+            keyguardRoot = utils.keyguardRootViewModel(),
+            notifications = utils.notificationsPlaceholderViewModel(),
         )
 
     private val mobileIconsInteractor = FakeMobileIconsInteractor(FakeMobileMappingsProxy(), mock())
@@ -237,6 +239,7 @@ class SceneFrameworkIntegrationTest : SysuiTestCase() {
                 deviceEntryInteractor = deviceEntryInteractor,
                 shadeHeaderViewModel = shadeHeaderViewModel,
                 qsSceneAdapter = qsFlexiglassAdapter,
+                notifications = utils.notificationsPlaceholderViewModel(),
             )
 
         utils.deviceEntryRepository.setUnlocked(false)
diff --git a/packages/SystemUI/tests/src/com/android/systemui/shade/ui/viewmodel/ShadeSceneViewModelTest.kt b/packages/SystemUI/tests/src/com/android/systemui/shade/ui/viewmodel/ShadeSceneViewModelTest.kt
index 0d3b2b372610..e2640af136a7 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/shade/ui/viewmodel/ShadeSceneViewModelTest.kt
+++ b/packages/SystemUI/tests/src/com/android/systemui/shade/ui/viewmodel/ShadeSceneViewModelTest.kt
@@ -101,6 +101,7 @@ class ShadeSceneViewModelTest : SysuiTestCase() {
                 deviceEntryInteractor = deviceEntryInteractor,
                 shadeHeaderViewModel = shadeHeaderViewModel,
                 qsSceneAdapter = qsFlexiglassAdapter,
+                notifications = utils.notificationsPlaceholderViewModel(),
             )
     }
 
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/SharedNotificationContainerViewModelTest.kt b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/SharedNotificationContainerViewModelTest.kt
index db8f21714964..3d54fdf9e364 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/SharedNotificationContainerViewModelTest.kt
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/SharedNotificationContainerViewModelTest.kt
@@ -253,8 +253,9 @@ class SharedNotificationContainerViewModelTest : SysuiTestCase() {
             // Start on lockscreen
             showLockscreen()
 
-            keyguardInteractor.sharedNotificationContainerPosition.value =
+            keyguardInteractor.setSharedNotificationContainerPosition(
                 SharedNotificationContainerPosition(top = 1f, bottom = 2f)
+            )
 
             assertThat(position)
                 .isEqualTo(SharedNotificationContainerPosition(top = 1f, bottom = 2f))
@@ -273,8 +274,9 @@ class SharedNotificationContainerViewModelTest : SysuiTestCase() {
             // Start on lockscreen
             showLockscreen()
 
-            keyguardInteractor.sharedNotificationContainerPosition.value =
+            keyguardInteractor.setSharedNotificationContainerPosition(
                 SharedNotificationContainerPosition(top = 1f, bottom = 2f)
+            )
             runCurrent()
 
             // Top should be overridden to 0f
@@ -327,8 +329,9 @@ class SharedNotificationContainerViewModelTest : SysuiTestCase() {
 
             overrideResource(R.bool.config_use_split_notification_shade, false)
             configurationRepository.onAnyConfigurationChange()
-            keyguardInteractor.sharedNotificationContainerPosition.value =
+            keyguardInteractor.setSharedNotificationContainerPosition(
                 SharedNotificationContainerPosition(top = 1f, bottom = 2f)
+            )
 
             assertThat(maxNotifications).isEqualTo(10)
 
@@ -349,8 +352,9 @@ class SharedNotificationContainerViewModelTest : SysuiTestCase() {
 
             overrideResource(R.bool.config_use_split_notification_shade, false)
             configurationRepository.onAnyConfigurationChange()
-            keyguardInteractor.sharedNotificationContainerPosition.value =
+            keyguardInteractor.setSharedNotificationContainerPosition(
                 SharedNotificationContainerPosition(top = 1f, bottom = 2f)
+            )
 
             assertThat(maxNotifications).isEqualTo(10)
 
@@ -383,8 +387,9 @@ class SharedNotificationContainerViewModelTest : SysuiTestCase() {
 
             overrideResource(R.bool.config_use_split_notification_shade, false)
             configurationRepository.onAnyConfigurationChange()
-            keyguardInteractor.sharedNotificationContainerPosition.value =
+            keyguardInteractor.setSharedNotificationContainerPosition(
                 SharedNotificationContainerPosition(top = 1f, bottom = 2f)
+            )
 
             // -1 means No Limit
             assertThat(maxNotifications).isEqualTo(-1)
diff --git a/packages/SystemUI/tests/utils/src/com/android/systemui/scene/SceneTestUtils.kt b/packages/SystemUI/tests/utils/src/com/android/systemui/scene/SceneTestUtils.kt
index 29e73b548b0b..2decb3e67c53 100644
--- a/packages/SystemUI/tests/utils/src/com/android/systemui/scene/SceneTestUtils.kt
+++ b/packages/SystemUI/tests/utils/src/com/android/systemui/scene/SceneTestUtils.kt
@@ -64,6 +64,7 @@ import com.android.systemui.keyguard.data.repository.FakeTrustRepository
 import com.android.systemui.keyguard.data.repository.KeyguardRepository
 import com.android.systemui.keyguard.data.repository.TrustRepository
 import com.android.systemui.keyguard.domain.interactor.KeyguardInteractor
+import com.android.systemui.keyguard.ui.viewmodel.KeyguardRootViewModel
 import com.android.systemui.kosmos.Kosmos
 import com.android.systemui.kosmos.testDispatcher
 import com.android.systemui.kosmos.testScope
@@ -78,6 +79,9 @@ import com.android.systemui.scene.shared.flag.FakeSceneContainerFlags
 import com.android.systemui.scene.shared.model.SceneContainerConfig
 import com.android.systemui.scene.shared.model.SceneKey
 import com.android.systemui.shade.data.repository.FakeShadeRepository
+import com.android.systemui.statusbar.notification.stack.data.repository.NotificationStackAppearanceRepository
+import com.android.systemui.statusbar.notification.stack.domain.interactor.NotificationStackAppearanceInteractor
+import com.android.systemui.statusbar.notification.stack.ui.viewmodel.NotificationsPlaceholderViewModel
 import com.android.systemui.statusbar.phone.ScreenOffAnimationController
 import com.android.systemui.statusbar.pipeline.mobile.data.repository.FakeMobileConnectionsRepository
 import com.android.systemui.statusbar.pipeline.mobile.data.repository.MobileConnectionsRepository
@@ -117,6 +121,7 @@ class SceneTestUtils(
         FakeFeatureFlagsClassic().apply {
             set(Flags.FACE_AUTH_REFACTOR, false)
             set(Flags.FULL_SCREEN_USER_SWITCHER, false)
+            set(Flags.NSSL_DEBUG_LINES, false)
         }
     val sceneContainerFlags = FakeSceneContainerFlags().apply { enabled = true }
     val deviceEntryRepository: FakeDeviceEntryRepository by lazy { FakeDeviceEntryRepository() }
@@ -271,6 +276,19 @@ class SceneTestUtils(
         )
     }
 
+    fun keyguardRootViewModel(): KeyguardRootViewModel = mock()
+
+    fun notificationsPlaceholderViewModel(): NotificationsPlaceholderViewModel {
+        return NotificationsPlaceholderViewModel(
+            interactor =
+                NotificationStackAppearanceInteractor(
+                    repository = NotificationStackAppearanceRepository(),
+                ),
+            flags = sceneContainerFlags,
+            featureFlags = featureFlags,
+        )
+    }
+
     fun bouncerViewModel(
         bouncerInteractor: BouncerInteractor,
         authenticationInteractor: AuthenticationInteractor,
author	Jeff DeCew <jeffdq@google.com>	2023-09-19 21:08:13 +0000
committer	Jeff DeCew <jeffdq@google.com>	2023-11-16 17:39:11 +0000
commit	cdd70211b3594163bf88b21dd62272ea5370f79d (patch)
tree	3976639900848bea93b47bbc61f7d750a62be480
parent	45d0bd1e7af185452b49ad81d45db45756f3edcc (diff)