Merge "Don't animate in bouncer contents if initiated from dragging" into main

    // Give an extra delay for showing BouncerContent if face auth or active unlock may run.

    // This gives passive auth methods an opportunity to succeed before showing bouncer contents.

    val appearAnimationInterpolator = FastOutSlowInEasing

    val appearAnimationDuration = 250

    var appearAnimationDuration: Int by remember { mutableIntStateOf(0) }

    var appearAnimationDelay: Int by remember { mutableIntStateOf(0) }

    var startAppearAnimation: Boolean by remember { mutableStateOf(false) }

    val animatedAlpha: Float by

        appearAnimationDelay =

            BOUNCER_CONTENTS_PASSIVE_AUTH_DELAY.takeIf { viewModel.shouldDelayBouncerContent() }

                ?: 0

        // evaluate once when BouncerContent first shows; we don't animate if the

        // bouncer showing was initiated from a drag/fling

        appearAnimationDuration =

            if (!isDraggingToBouncer()) BOUNCER_CONTENTS_ALPHA_IN_ANIMATION_DURATION else 0

        startAppearAnimation = true

    }

                    alpha =

                        if (isDraggingToBouncer()) {

                            appearAnimationInterpolator.transform(

                                // animate in along with the layout's transition

                                layoutState.currentTransition!!.progress

                            )

                        } else {

                            // animate in separately from the layout's transition

                            animatedAlpha

                        }

                },

}

private const val BOUNCER_CONTENTS_PASSIVE_AUTH_DELAY = 500

private const val BOUNCER_CONTENTS_ALPHA_IN_ANIMATION_DURATION = 250