Always play z push for predictive cross activity back animation (947a27ec) · Commits · e / os / android_frameworks_base

libs/WindowManager/Shell/src/com/android/wm/shell/back/CrossActivityBackAnimation.kt

+33 −10

Original line number	Diff line number	Diff line
		@@ -109,6 +109,7 @@ abstract class CrossActivityBackAnimation(
		private val postCommitFlingSpring = SpringForce(SPRING_SCALE)
		.setStiffness(SpringForce.STIFFNESS_LOW)
		.setDampingRatio(SpringForce.DAMPING_RATIO_LOW_BOUNCY)
		protected var gestureProgress = 0f

		/** Background color to be used during the animation, also see [getBackgroundColor] */
		protected var customizedBackgroundColor = 0
		@@ -212,6 +213,7 @@ abstract class CrossActivityBackAnimation(

		private fun onGestureProgress(backEvent: BackEvent) {
		val progress = gestureInterpolator.getInterpolation(backEvent.progress)
		gestureProgress = progress
		currentClosingRect.setInterpolatedRectF(startClosingRect, targetClosingRect, progress)
		val yOffset = getYOffset(currentClosingRect, backEvent.touchY)
		currentClosingRect.offset(0f, yOffset)
		@@ -257,9 +259,11 @@ abstract class CrossActivityBackAnimation(
		}

		// kick off spring animation with the current velocity from the pre-commit phase, this
		// affects the scaling of the closing activity during post-commit
		// affects the scaling of the closing and/or opening activity during post-commit
		val startVelocity =
		if (gestureProgress < 0.1f) -DEFAULT_FLING_VELOCITY else -velocity * SPRING_SCALE
		val flingAnimation = SpringAnimation(postCommitFlingScale, SPRING_SCALE)
		.setStartVelocity(min(0f, -velocity * SPRING_SCALE))
		.setStartVelocity(startVelocity.coerceIn(-MAX_FLING_VELOCITY, 0f))
		.setStartValue(SPRING_SCALE)
		.setSpring(postCommitFlingSpring)
		flingAnimation.start()
		@@ -315,19 +319,22 @@ abstract class CrossActivityBackAnimation(
		isLetterboxed = false
		enteringHasSameLetterbox = false
		lastPostCommitFlingScale = SPRING_SCALE
		gestureProgress = 0f
		}

		protected fun applyTransform(
		leash: SurfaceControl?,
		rect: RectF,
		alpha: Float,
		baseTransformation: Transformation? = null
		baseTransformation: Transformation? = null,
		flingMode: FlingMode = FlingMode.NO_FLING
		) {
		if (leash == null \|\| !leash.isValid) return
		tempRectF.set(rect)
		if (leash == closingTarget?.leash) {
		lastPostCommitFlingScale = (postCommitFlingScale.value / SPRING_SCALE).coerceIn(
		minimumValue = MAX_FLING_SCALE, maximumValue = lastPostCommitFlingScale
		if (flingMode != FlingMode.NO_FLING) {
		lastPostCommitFlingScale = min(
		postCommitFlingScale.value / SPRING_SCALE,
		if (flingMode == FlingMode.FLING_BOUNCE) 1f else lastPostCommitFlingScale
		)
		// apply an additional scale to the closing target to account for fling velocity
		tempRectF.scaleCentered(lastPostCommitFlingScale)
		@@ -529,14 +536,30 @@ abstract class CrossActivityBackAnimation(
		private const val MAX_SCRIM_ALPHA_DARK = 0.8f
		private const val MAX_SCRIM_ALPHA_LIGHT = 0.2f
		private const val SPRING_SCALE = 100f
		private const val MAX_FLING_SCALE = 0.6f
		private const val MAX_FLING_VELOCITY = 1000f
		private const val DEFAULT_FLING_VELOCITY = 120f
		}

		enum class FlingMode {
		NO_FLING,

		/**
		* This is used for the closing target in custom cross-activity back animations. When the
		* back gesture is flung, the closing target shrinks a bit further with a spring motion.
		*/
		FLING_SHRINK,

		/**
		* This is used for the closing and opening target in the default cross-activity back
		* animation. When the back gesture is flung, the closing and opening targets shrink a
		* bit further and then bounce back with a spring motion.
		*/
		FLING_BOUNCE
		}
		}

		// The target will loose focus when alpha == 0, so keep a minimum value for it.
		private fun keepMinimumAlpha(transAlpha: Float): Float {
		return max(transAlpha.toDouble(), 0.005).toFloat()
		}
		private fun keepMinimumAlpha(transAlpha: Float) = max(transAlpha, 0.005f)

		private fun isDarkMode(context: Context): Boolean {
		return context.resources.configuration.uiMode and Configuration.UI_MODE_NIGHT_MASK ==

libs/WindowManager/Shell/src/com/android/wm/shell/back/CustomCrossActivityBackAnimation.kt

+12 −7

Original line number	Diff line number	Diff line
		@@ -57,7 +57,6 @@ class CustomCrossActivityBackAnimation(
		private var enterAnimation: Animation? = null
		private var closeAnimation: Animation? = null
		private val transformation = Transformation()
		private var gestureProgress = 0f

		override val allowEnteringYShift = false

		@@ -105,7 +104,6 @@ class CustomCrossActivityBackAnimation(
		}

		override fun getPreCommitEnteringBaseTransformation(progress: Float): Transformation {
		gestureProgress = progress
		transformation.clear()
		enterAnimation!!.getTransformationAt(progress * PRE_COMMIT_MAX_PROGRESS, transformation)
		return transformation
		@@ -134,7 +132,13 @@ class CustomCrossActivityBackAnimation(
		if (closingTarget == null \|\| enteringTarget == null) return

		val closingProgress = closeAnimation!!.getPostCommitProgress(linearProgress)
		applyTransform(closingTarget!!.leash, currentClosingRect, closingProgress, closeAnimation!!)
		applyTransform(
		closingTarget!!.leash,
		currentClosingRect,
		closingProgress,
		closeAnimation!!,
		FlingMode.FLING_SHRINK
		)
		val enteringProgress = MathUtils.lerp(
		gestureProgress * PRE_COMMIT_MAX_PROGRESS,
		1f,
		@@ -144,7 +148,8 @@ class CustomCrossActivityBackAnimation(
		enteringTarget!!.leash,
		currentEnteringRect,
		enteringProgress,
		enterAnimation!!
		enterAnimation!!,
		FlingMode.NO_FLING
		)
		applyTransaction()
		}
		@@ -153,11 +158,12 @@ class CustomCrossActivityBackAnimation(
		leash: SurfaceControl,
		rect: RectF,
		progress: Float,
		animation: Animation
		animation: Animation,
		flingMode: FlingMode
		) {
		transformation.clear()
		animation.getTransformationAt(progress, transformation)
		applyTransform(leash, rect, transformation.alpha, transformation)
		applyTransform(leash, rect, transformation.alpha, transformation, flingMode)
		}

		override fun finishAnimation() {
		@@ -166,7 +172,6 @@ class CustomCrossActivityBackAnimation(
		enterAnimation?.reset()
		enterAnimation = null
		transformation.clear()
		gestureProgress = 0f
		super.finishAnimation()
		}

libs/WindowManager/Shell/src/com/android/wm/shell/back/DefaultCrossActivityBackAnimation.kt

+12 −2

Original line number	Diff line number	Diff line
		@@ -90,9 +90,19 @@ constructor(
		val closingAlpha = max(1f - linearProgress * 5, 0f)
		val progress = postCommitInterpolator.getInterpolation(linearProgress)
		currentClosingRect.setInterpolatedRectF(startClosingRect, targetClosingRect, progress)
		applyTransform(closingTarget?.leash, currentClosingRect, closingAlpha)
		applyTransform(
		closingTarget?.leash,
		currentClosingRect,
		closingAlpha,
		flingMode = FlingMode.FLING_BOUNCE
		)
		currentEnteringRect.setInterpolatedRectF(startEnteringRect, targetEnteringRect, progress)
		applyTransform(enteringTarget?.leash, currentEnteringRect, 1f)
		applyTransform(
		enteringTarget?.leash,
		currentEnteringRect,
		1f,
		flingMode = FlingMode.FLING_BOUNCE
		)
		applyTransaction()
		}