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Commit 9e7ee4ab authored by Alejandro Nijamkin's avatar Alejandro Nijamkin
Browse files

[flexiglass] Improved structured concurrency in SceneContainer. 

In an effort to improve performance by leveraging structured
concurrency:

1. Changed Scene.destinationScenes from StateFlow to just Flow
2. Changed SceneContainer to collect only the destinationScenes of the
   current scene
3. Added Scene.activate to hydrate scenes
4. Changed SceneContainer to call activate on the current scene and
   cancel the one that was previously activated
5. Removed @Application CoroutineScope from scene view-model classes
   that didn't need it anymore (more cleanup to come)

Bug: 354270224
Test: manually ran a smoke test on Flexiglass: can change scenes to
shade, QS, and bouncer over lockscreen, can unlock, can change to shade
and QS, and re-lock.
Flag: com.android.systemui.scene_container

Change-Id: I3dfee72630322e0cb93ac76324be9d935e3a67f1
parent 1c80a98d

packages/SystemUI/compose/features/src/com/android/systemui/bouncer/ui/composable/BouncerScene.kt

+2 −2
Original line number Diff line number Diff line
@@ -33,7 +33,7 @@ import com.android.systemui.dagger.SysUISingleton 
import com.android.systemui.scene.shared.model.Scenes

import com.android.systemui.scene.ui.composable.ComposableScene

import javax.inject.Inject

import kotlinx.coroutines.flow.StateFlow

import kotlinx.coroutines.flow.Flow



object Bouncer {

    object Elements {
@@ -56,7 +56,7 @@ constructor( 
) : ComposableScene {

    override val key = Scenes.Bouncer



    override val destinationScenes: StateFlow<Map<UserAction, UserActionResult>> =

    override val destinationScenes: Flow<Map<UserAction, UserActionResult>> =

        viewModel.destinationScenes



    @Composable

packages/SystemUI/compose/features/src/com/android/systemui/communal/ui/compose/CommunalScene.kt

+2 −2
Original line number Diff line number Diff line
@@ -30,8 +30,8 @@ import com.android.systemui.scene.shared.model.Scenes 
import com.android.systemui.scene.ui.composable.ComposableScene

import com.android.systemui.statusbar.phone.SystemUIDialogFactory

import javax.inject.Inject

import kotlinx.coroutines.flow.Flow

import kotlinx.coroutines.flow.MutableStateFlow

import kotlinx.coroutines.flow.StateFlow

import kotlinx.coroutines.flow.asStateFlow



/** The communal scene shows glanceable hub when the device is locked and docked. */
@@ -45,7 +45,7 @@ constructor( 
) : ComposableScene {

    override val key = Scenes.Communal



    override val destinationScenes: StateFlow<Map<UserAction, UserActionResult>> =

    override val destinationScenes: Flow<Map<UserAction, UserActionResult>> =

        MutableStateFlow<Map<UserAction, UserActionResult>>(

                mapOf(

                    Swipe(SwipeDirection.Right) to UserActionResult(Scenes.Lockscreen),

packages/SystemUI/compose/features/src/com/android/systemui/keyguard/ui/composable/LockscreenScene.kt

+2 −2
Original line number Diff line number Diff line
@@ -30,7 +30,7 @@ import com.android.systemui.scene.shared.model.Scenes 
import com.android.systemui.scene.ui.composable.ComposableScene

import dagger.Lazy

import javax.inject.Inject

import kotlinx.coroutines.flow.StateFlow

import kotlinx.coroutines.flow.Flow



/** The lock screen scene shows when the device is locked. */

@SysUISingleton
@@ -42,7 +42,7 @@ constructor( 
) : ComposableScene {

    override val key = Scenes.Lockscreen



    override val destinationScenes: StateFlow<Map<UserAction, UserActionResult>> =

    override val destinationScenes: Flow<Map<UserAction, UserActionResult>> =

        viewModel.destinationScenes



    @Composable

packages/SystemUI/compose/features/src/com/android/systemui/notifications/ui/composable/NotificationsShadeScene.kt

+2 −2
Original line number Diff line number Diff line
@@ -44,7 +44,7 @@ import com.android.systemui.statusbar.phone.ui.TintedIconManager 
import dagger.Lazy

import java.util.Optional

import javax.inject.Inject

import kotlinx.coroutines.flow.StateFlow

import kotlinx.coroutines.flow.Flow



@SysUISingleton

class NotificationsShadeScene
@@ -64,7 +64,7 @@ constructor( 


    override val key = Scenes.NotificationsShade



    override val destinationScenes: StateFlow<Map<UserAction, UserActionResult>> =

    override val destinationScenes: Flow<Map<UserAction, UserActionResult>> =

        sceneViewModel.destinationScenes



    @Composable

packages/SystemUI/compose/features/src/com/android/systemui/qs/ui/composable/QuickSettingsScene.kt

+5 −11
Original line number Diff line number Diff line
@@ -69,6 +69,8 @@ import androidx.compose.ui.unit.dp 
import androidx.lifecycle.compose.collectAsStateWithLifecycle

import com.android.compose.animation.scene.SceneScope

import com.android.compose.animation.scene.TransitionState

import com.android.compose.animation.scene.UserAction

import com.android.compose.animation.scene.UserActionResult

import com.android.compose.animation.scene.animateSceneDpAsState

import com.android.compose.animation.scene.animateSceneFloatAsState

import com.android.compose.modifiers.thenIf
@@ -79,7 +81,6 @@ import com.android.systemui.common.ui.compose.windowinsets.LocalDisplayCutout 
import com.android.systemui.common.ui.compose.windowinsets.LocalRawScreenHeight

import com.android.systemui.compose.modifiers.sysuiResTag

import com.android.systemui.dagger.SysUISingleton

import com.android.systemui.dagger.qualifiers.Application

import com.android.systemui.media.controls.ui.composable.MediaCarousel

import com.android.systemui.media.controls.ui.controller.MediaCarouselController

import com.android.systemui.media.controls.ui.view.MediaHost
@@ -109,16 +110,13 @@ import dagger.Lazy 
import javax.inject.Inject

import javax.inject.Named

import kotlin.math.roundToInt

import kotlinx.coroutines.CoroutineScope

import kotlinx.coroutines.flow.SharingStarted

import kotlinx.coroutines.flow.stateIn

import kotlinx.coroutines.flow.Flow



/** The Quick Settings (AKA "QS") scene shows the quick setting tiles. */

@SysUISingleton

class QuickSettingsScene

@Inject

constructor(

    @Application private val applicationScope: CoroutineScope,

    private val shadeSession: SaveableSession,

    private val notificationStackScrollView: Lazy<NotificationScrollView>,

    private val viewModel: QuickSettingsSceneViewModel,
@@ -131,12 +129,8 @@ constructor( 
) : ComposableScene {

    override val key = Scenes.QuickSettings



    override val destinationScenes =

        viewModel.destinationScenes.stateIn(

            scope = applicationScope,

            started = SharingStarted.WhileSubscribed(),

            initialValue = emptyMap(),

        )

    override val destinationScenes: Flow<Map<UserAction, UserActionResult>> =

        viewModel.destinationScenes



    @Composable

    override fun SceneScope.Content(