Merge "Prevent unnecessary recompositions on communal container" into main

) {

    val coroutineScope = rememberCoroutineScope()

    val currentSceneKey: SceneKey by viewModel.currentScene.collectAsStateWithLifecycle()

    val touchesAllowed by viewModel.touchesAllowed.collectAsStateWithLifecycle()

    val backgroundType by

        viewModel.communalBackground.collectAsStateWithLifecycle(

            initialValue = CommunalBackgroundType.ANIMATED

            canChangeScene = { toScene -> viewModel.canChangeScene(toScene) },

            transitions = if (viewModel.v2FlagEnabled()) sceneTransitionsV2 else sceneTransitions,

        )

    val isUiBlurred by viewModel.isUiBlurred.collectAsStateWithLifecycle()

    val detector = remember { CommunalSwipeDetector() }

    DisposableEffect(state) {

        onDispose { viewModel.setTransitionState(null) }

    }

    val blurRadius = with(LocalDensity.current) { viewModel.blurRadiusPx.toDp() }

    val swipeFromHubInLandscape by

        viewModel.swipeFromHubInLandscape.collectAsStateWithLifecycle(false)

    SceneTransitionLayout(

        state = state,

        modifier = modifier.fillMaxSize().thenIf(isUiBlurred) { Modifier.blur(blurRadius) },

        modifier = modifier.fillMaxSize(),

        swipeSourceDetector = detector,

        swipeDetector = detector,

    ) {

                        UserActionResult(CommunalScenes.Blank, CommunalTransitionKeys.SwipeUp),

                ),

        ) {

            val touchesAllowed by viewModel.touchesAllowed.collectAsStateWithLifecycle()

            CommunalScene(

                backgroundType = backgroundType,

                colors = colors,

                ambientStatusBarSection = ambientStatusBarSection,

                viewModel = viewModel,

            )

        }

    }

    // Touches on the notification shade in blank areas fall through to the glanceable hub. When the

    // shade is showing, we block all touches in order to prevent this unwanted behavior.

            // Touches on the notification shade in blank areas fall through to the glanceable hub.

            // When the shade is showing, we block all touches in order to prevent this unwanted

            // behavior.

            Box(modifier = Modifier.fillMaxSize().allowGestures(touchesAllowed))

        }

    }

}

/** Scene containing the glanceable hub UI. */

@Composable

    modifier: Modifier = Modifier,

) {

    val isFocusable by viewModel.isFocusable.collectAsStateWithLifecycle(initialValue = false)

    val isBlurred by viewModel.isUiBlurred.collectAsStateWithLifecycle()

    val blurRadius = with(LocalDensity.current) { viewModel.blurRadiusPx.toDp() }

    Box(

        modifier =

            Modifier.element(Communal.Elements.Scrim)

                .fillMaxSize()

                .thenIf(isBlurred) { Modifier.blur(blurRadius) }

                .then(

                    if (isFocusable) {

                        Modifier.focusable()