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Commit 5a834336 authored by omarmt's avatar omarmt
Browse files

PriorityNestedScrollConnection: make onStop suspendable and add onCancel 

The onStop lambda is now a suspend function. This allows for performing
long-running operations, such as animations, within the onStop callback.

The onCancel lambda has been added, this lambda will be invoked when the
nested scrolling operation is canceled, for example, if the user cannot
scroll anymore.

Test: atest PriorityNestedScrollConnectionTest
Bug: 370949877
Flag: com.android.systemui.scene_container
Change-Id: I4cc652fe4f6baac800e1484e7bddfbf5510de2b1
parent 40c5c231

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

+8 −2
Original line number Diff line number Diff line
@@ -73,13 +73,19 @@ fun NotificationScrimNestedScrollConnection( 
            snapScrimOffset(currentHeight + amountConsumed)

            amountConsumed

        },

        // Don't consume the velocity on pre/post fling

        onStop = { velocityAvailable ->

            onStop(velocityAvailable)

            if (scrimOffset() < minScrimOffset()) {

                animateScrimOffset(minScrimOffset())

            }

            { 0f }

            // Don't consume the velocity on pre/post fling

            0f

        },

        onCancel = {

            onStop(0f)

            if (scrimOffset() < minScrimOffset()) {

                animateScrimOffset(minScrimOffset())

            }

        },

    )

}

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

+2 −1
Original line number Diff line number Diff line
@@ -104,7 +104,8 @@ fun NotificationStackNestedScrollConnection( 
        },

        onStop = { velocityAvailable ->

            onStop(velocityAvailable)

            suspend { velocityAvailable }

            velocityAvailable

        },

        onCancel = { onStop(0f) },

    )

}

packages/SystemUI/compose/scene/src/com/android/compose/animation/scene/DraggableHandler.kt

+14 −5
Original line number Diff line number Diff line
@@ -27,9 +27,10 @@ import com.android.compose.animation.scene.content.Content 
import com.android.compose.animation.scene.content.state.TransitionState

import com.android.compose.animation.scene.content.state.TransitionState.HasOverscrollProperties.Companion.DistanceUnspecified

import com.android.compose.nestedscroll.PriorityNestedScrollConnection

import com.android.compose.nestedscroll.SuspendedValue

import kotlin.math.absoluteValue



internal typealias SuspendedValue<T> = suspend () -> T



internal interface DraggableHandler {

    /**

     * Start a drag in the given [startedPosition], with the given [overSlop] and number of
@@ -712,10 +713,18 @@ internal class NestedScrollHandlerImpl( 
            },

            onStop = { velocityAvailable ->

                val controller = dragController ?: error("Should be called after onStart")



                try {

                    controller

                        .onStop(velocity = velocityAvailable, canChangeContent = canChangeScene)

                    .also { dragController = null }

                        .invoke()

                } finally {

                    dragController = null

                }

            },

            onCancel = {

                val controller = dragController ?: error("Should be called after onStart")

                controller.onStop(velocity = 0f, canChangeContent = canChangeScene)

                dragController = null

            },

        )

    }

packages/SystemUI/compose/scene/src/com/android/compose/animation/scene/SwipeAnimation.kt

+0 −1
Original line number Diff line number Diff line
@@ -27,7 +27,6 @@ import androidx.compose.runtime.setValue 
import androidx.compose.ui.unit.IntSize

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

import com.android.compose.animation.scene.content.state.TransitionState.HasOverscrollProperties.Companion.DistanceUnspecified

import com.android.compose.nestedscroll.SuspendedValue

import kotlin.math.absoluteValue

import kotlinx.coroutines.CompletableDeferred

packages/SystemUI/compose/scene/src/com/android/compose/nestedscroll/LargeTopAppBarNestedScrollConnection.kt

+2 −1
Original line number Diff line number Diff line
@@ -70,6 +70,7 @@ fun LargeTopAppBarNestedScrollConnection( 
            amountConsumed

        },

        // Don't consume the velocity on pre/post fling

        onStop = { { 0f } },

        onStop = { 0f },

        onCancel = { /* do nothing */ },

    )

}