[bc25] Add an animated transition for `NotificationsShadeScene`.

This is a basic transition for the shade from both `Gone` and
`Lockscreen` scenes. Once a motion spec is available, this transition
will be revised and improved.

Test: Manually tested by opening and closing the notifications shade on
a foldable device both in a folded and unfolded configuration.
Test: Unit tests build and pass.
Bug: 342463447
Flag: com.android.systemui.dual_shade

Change-Id: I47eb0e460250b5069c724b1453a5efdd8d28f9bb

4 files changed, 122 insertions, 0 deletions

diff --git a/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/SceneContainerTransitions.kt b/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/SceneContainerTransitions.kt
index cbaa89438f2e..34ea511b7156 100644
--- a/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/SceneContainerTransitions.kt
+++ b/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/SceneContainerTransitions.kt
@@ -8,12 +8,14 @@ import com.android.systemui.scene.shared.model.Scenes
 import com.android.systemui.scene.shared.model.TransitionKeys.SlightlyFasterShadeCollapse
 import com.android.systemui.scene.shared.model.TransitionKeys.ToSplitShade
 import com.android.systemui.scene.ui.composable.transitions.bouncerToGoneTransition
+import com.android.systemui.scene.ui.composable.transitions.goneToNotificationsShadeTransition
 import com.android.systemui.scene.ui.composable.transitions.goneToQuickSettingsTransition
 import com.android.systemui.scene.ui.composable.transitions.goneToShadeTransition
 import com.android.systemui.scene.ui.composable.transitions.goneToSplitShadeTransition
 import com.android.systemui.scene.ui.composable.transitions.lockscreenToBouncerTransition
 import com.android.systemui.scene.ui.composable.transitions.lockscreenToCommunalTransition
 import com.android.systemui.scene.ui.composable.transitions.lockscreenToGoneTransition
+import com.android.systemui.scene.ui.composable.transitions.lockscreenToNotificationsShadeTransition
 import com.android.systemui.scene.ui.composable.transitions.lockscreenToQuickSettingsTransition
 import com.android.systemui.scene.ui.composable.transitions.lockscreenToShadeTransition
 import com.android.systemui.scene.ui.composable.transitions.lockscreenToSplitShadeTransition
@@ -37,6 +39,7 @@ val SceneContainerTransitions = transitions {
     // Scene transitions
 
     from(Scenes.Bouncer, to = Scenes.Gone) { bouncerToGoneTransition() }
+    from(Scenes.Gone, to = Scenes.NotificationsShade) { goneToNotificationsShadeTransition() }
     from(Scenes.Gone, to = Scenes.Shade) { goneToShadeTransition() }
     from(
         Scenes.Gone,
@@ -55,6 +58,9 @@ val SceneContainerTransitions = transitions {
     from(Scenes.Gone, to = Scenes.QuickSettings) { goneToQuickSettingsTransition() }
     from(Scenes.Lockscreen, to = Scenes.Bouncer) { lockscreenToBouncerTransition() }
     from(Scenes.Lockscreen, to = Scenes.Communal) { lockscreenToCommunalTransition() }
+    from(Scenes.Lockscreen, to = Scenes.NotificationsShade) {
+        lockscreenToNotificationsShadeTransition()
+    }
     from(Scenes.Lockscreen, to = Scenes.Shade) { lockscreenToShadeTransition() }
     from(
         Scenes.Lockscreen,
diff --git a/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/transitions/FromGoneToNotificationsShadeTransition.kt b/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/transitions/FromGoneToNotificationsShadeTransition.kt
new file mode 100644
index 000000000000..48ec198a790a
--- /dev/null
+++ b/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/transitions/FromGoneToNotificationsShadeTransition.kt
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2024 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.scene.ui.composable.transitions
+
+import com.android.compose.animation.scene.TransitionBuilder
+
+fun TransitionBuilder.goneToNotificationsShadeTransition(
+    durationScale: Double = 1.0,
+) {
+    toNotificationsShadeTransition(durationScale)
+}
diff --git a/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/transitions/FromLockscreenToNotificationsShadeTransition.kt b/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/transitions/FromLockscreenToNotificationsShadeTransition.kt
new file mode 100644
index 000000000000..372e4a1af482
--- /dev/null
+++ b/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/transitions/FromLockscreenToNotificationsShadeTransition.kt
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2024 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.scene.ui.composable.transitions
+
+import com.android.compose.animation.scene.TransitionBuilder
+
+fun TransitionBuilder.lockscreenToNotificationsShadeTransition(
+    durationScale: Double = 1.0,
+) {
+    toNotificationsShadeTransition(durationScale)
+}
diff --git a/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/transitions/ToNotificationsShadeTransition.kt b/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/transitions/ToNotificationsShadeTransition.kt
new file mode 100644
index 000000000000..a6b268d59bf4
--- /dev/null
+++ b/packages/SystemUI/compose/features/src/com/android/systemui/scene/ui/composable/transitions/ToNotificationsShadeTransition.kt
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2024 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.scene.ui.composable.transitions
+
+import androidx.compose.animation.core.Spring
+import androidx.compose.animation.core.spring
+import androidx.compose.animation.core.tween
+import androidx.compose.foundation.gestures.Orientation
+import androidx.compose.ui.unit.IntSize
+import com.android.compose.animation.scene.Edge
+import com.android.compose.animation.scene.TransitionBuilder
+import com.android.compose.animation.scene.UserActionDistance
+import com.android.compose.animation.scene.UserActionDistanceScope
+import com.android.systemui.notifications.ui.composable.Notifications
+import com.android.systemui.shade.ui.composable.OverlayShade
+import com.android.systemui.shade.ui.composable.Shade
+import com.android.systemui.shade.ui.composable.ShadeHeader
+import kotlin.time.Duration.Companion.milliseconds
+
+fun TransitionBuilder.toNotificationsShadeTransition(
+    durationScale: Double = 1.0,
+) {
+    spec = tween(durationMillis = (DefaultDuration * durationScale).inWholeMilliseconds.toInt())
+    swipeSpec =
+        spring(
+            stiffness = Spring.StiffnessMediumLow,
+            visibilityThreshold = Shade.Dimensions.ScrimVisibilityThreshold,
+        )
+    distance =
+        object : UserActionDistance {
+            override fun UserActionDistanceScope.absoluteDistance(
+                fromSceneSize: IntSize,
+                orientation: Orientation,
+            ): Float {
+                return fromSceneSize.height.toFloat() * 2 / 3f
+            }
+        }
+
+    translate(OverlayShade.Elements.PanelBackground, Edge.Top)
+    translate(Notifications.Elements.NotificationScrim, Edge.Top)
+
+    fractionRange(end = .5f) { fade(OverlayShade.Elements.Scrim) }
+
+    fractionRange(start = .5f) {
+        fade(ShadeHeader.Elements.Clock)
+        fade(ShadeHeader.Elements.ExpandedContent)
+        fade(ShadeHeader.Elements.PrivacyChip)
+        fade(Notifications.Elements.NotificationScrim)
+    }
+}
+
+private val DefaultDuration = 300.milliseconds