From 82cec88397fb885a3d52f24162c9ca7725c91a06 Mon Sep 17 00:00:00 2001
From: Jamie Garside <jgarside@google.com>
Date: Tue, 13 Sep 2022 00:15:13 +0100
Subject: [PATCH] Add large screen clock motion - method 2.

When the clock moves on a large screen (e.g. when locking/unlocking the
device), this adds a subtle offset for each digit of the clock.

This hooks a new transition in to the existing clock move transition,
which just forwards progress through to the actual clock. This also adds
a feature flag (210) to enable/disable this, since it needs a little
more polish yet.

As above, this needs more polish (tweaking the time and/or easing), but
this at least gets something moving to start with :).

Bug: 199051139
Test: Manually verified.
Change-Id: Icec0bcfdb431d24b9405c5dfe8993016f687cac5
---
 .../systemui/animation/TextAnimator.kt        |   8 +
 .../systemui/animation/TextInterpolator.kt    |   8 +-
 .../systemui/plugins/ClockProviderPlugin.kt   |  12 ++
 .../layout/keyguard_clock_switch.xml          |   1 +
 .../shared/clocks/AnimatableClockView.kt      | 175 +++++++++++++++++-
 .../shared/clocks/DefaultClockController.kt   |  12 ++
 .../KeyguardClockSwitchController.java        |   7 +-
 .../KeyguardStatusViewController.java         |   6 +
 .../src/com/android/systemui/flags/Flags.java |   6 +
 .../NotificationPanelViewController.java      |  86 ++++++++-
 .../KeyguardClockSwitchControllerTest.java    |  15 ++
 .../KeyguardStatusViewControllerTest.java     |  16 ++
 12 files changed, 344 insertions(+), 8 deletions(-)

diff --git a/packages/SystemUI/animation/src/com/android/systemui/animation/TextAnimator.kt b/packages/SystemUI/animation/src/com/android/systemui/animation/TextAnimator.kt
index 6780fb7fafe37..65d6c83d74a8f 100644
--- a/packages/SystemUI/animation/src/com/android/systemui/animation/TextAnimator.kt
+++ b/packages/SystemUI/animation/src/com/android/systemui/animation/TextAnimator.kt
@@ -82,6 +82,14 @@ class TextAnimator(layout: Layout, private val invalidateCallback: () -> Unit) {
         /** Mutable Y coordinate of the glyph position relative from the baseline. */
         var y: Float = 0f
 
+        /**
+         * The current line of text being drawn, in a multi-line TextView.
+         */
+        var lineNo: Int = 0
+
+        /**
+         * Mutable text size of the glyph in pixels.
+         */
         /** Mutable text size of the glyph in pixels. */
         var textSize: Float = 0f
 
diff --git a/packages/SystemUI/animation/src/com/android/systemui/animation/TextInterpolator.kt b/packages/SystemUI/animation/src/com/android/systemui/animation/TextInterpolator.kt
index db14fdf5930b7..f9fb42cd1670a 100644
--- a/packages/SystemUI/animation/src/com/android/systemui/animation/TextInterpolator.kt
+++ b/packages/SystemUI/animation/src/com/android/systemui/animation/TextInterpolator.kt
@@ -231,7 +231,9 @@ class TextInterpolator(layout: Layout) {
                     val origin = layout.getDrawOrigin(lineNo)
                     canvas.translate(origin, layout.getLineBaseline(lineNo).toFloat())
 
-                    run.fontRuns.forEach { fontRun -> drawFontRun(canvas, run, fontRun, tmpPaint) }
+                    run.fontRuns.forEach { fontRun ->
+                        drawFontRun(canvas, run, fontRun, lineNo, tmpPaint)
+                    }
                 } finally {
                     canvas.restore()
                 }
@@ -341,7 +343,7 @@ class TextInterpolator(layout: Layout) {
     var glyphFilter: GlyphCallback? = null
 
     // Draws single font run.
-    private fun drawFontRun(c: Canvas, line: Run, run: FontRun, paint: Paint) {
+    private fun drawFontRun(c: Canvas, line: Run, run: FontRun, lineNo: Int, paint: Paint) {
         var arrayIndex = 0
         val font = fontInterpolator.lerp(run.baseFont, run.targetFont, progress)
 
@@ -360,11 +362,13 @@ class TextInterpolator(layout: Layout) {
         tmpGlyph.font = font
         tmpGlyph.runStart = run.start
         tmpGlyph.runLength = run.end - run.start
+        tmpGlyph.lineNo = lineNo
 
         tmpPaintForGlyph.set(paint)
         var prevStart = run.start
 
         for (i in run.start until run.end) {
+            tmpGlyph.glyphIndex = i
             tmpGlyph.glyphId = line.glyphIds[i]
             tmpGlyph.x = MathUtils.lerp(line.baseX[i], line.targetX[i], progress)
             tmpGlyph.y = MathUtils.lerp(line.baseY[i], line.targetY[i], progress)
diff --git a/packages/SystemUI/plugin/src/com/android/systemui/plugins/ClockProviderPlugin.kt b/packages/SystemUI/plugin/src/com/android/systemui/plugins/ClockProviderPlugin.kt
index 1e74c3d68efc2..dabb43b6074d3 100644
--- a/packages/SystemUI/plugin/src/com/android/systemui/plugins/ClockProviderPlugin.kt
+++ b/packages/SystemUI/plugin/src/com/android/systemui/plugins/ClockProviderPlugin.kt
@@ -14,6 +14,7 @@
 package com.android.systemui.plugins
 
 import android.content.res.Resources
+import android.graphics.Rect
 import android.graphics.drawable.Drawable
 import android.view.View
 import com.android.systemui.plugins.annotations.ProvidesInterface
@@ -114,6 +115,17 @@ interface ClockAnimations {
 
     /** Runs the battery animation (if any). */
     fun charge() { }
+
+    /** Move the clock, for example, if the notification tray appears in split-shade mode. */
+    fun onPositionUpdated(fromRect: Rect, toRect: Rect, fraction: Float) { }
+
+    /**
+     * Whether this clock has a custom position update animation. If true, the keyguard will call
+     * `onPositionUpdated` to notify the clock of a position update animation. If false, a default
+     * animation will be used (e.g. a simple translation).
+     */
+    val hasCustomPositionUpdatedAnimation
+        get() = false
 }
 
 /** Events that have specific data about the related face */
diff --git a/packages/SystemUI/res-keyguard/layout/keyguard_clock_switch.xml b/packages/SystemUI/res-keyguard/layout/keyguard_clock_switch.xml
index 3ad7c8c4369ca..d64587dcf362f 100644
--- a/packages/SystemUI/res-keyguard/layout/keyguard_clock_switch.xml
+++ b/packages/SystemUI/res-keyguard/layout/keyguard_clock_switch.xml
@@ -37,6 +37,7 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:layout_marginTop="@dimen/keyguard_large_clock_top_margin"
+        android:clipChildren="false"
         android:visibility="gone" />
 
     <!-- Not quite optimal but needed to translate these items as a group. The
diff --git a/packages/SystemUI/shared/src/com/android/systemui/shared/clocks/AnimatableClockView.kt b/packages/SystemUI/shared/src/com/android/systemui/shared/clocks/AnimatableClockView.kt
index 860a5da44088e..134f3bc938474 100644
--- a/packages/SystemUI/shared/src/com/android/systemui/shared/clocks/AnimatableClockView.kt
+++ b/packages/SystemUI/shared/src/com/android/systemui/shared/clocks/AnimatableClockView.kt
@@ -20,16 +20,15 @@ import android.annotation.ColorInt
 import android.annotation.FloatRange
 import android.annotation.IntRange
 import android.annotation.SuppressLint
-import android.app.compat.ChangeIdStateCache.invalidate
 import android.content.Context
 import android.graphics.Canvas
+import android.graphics.Rect
 import android.text.Layout
 import android.text.TextUtils
 import android.text.format.DateFormat
 import android.util.AttributeSet
+import android.util.MathUtils
 import android.widget.TextView
-import com.android.internal.R.attr.contentDescription
-import com.android.internal.R.attr.format
 import com.android.internal.annotations.VisibleForTesting
 import com.android.systemui.animation.GlyphCallback
 import com.android.systemui.animation.Interpolators
@@ -39,6 +38,8 @@ import java.io.PrintWriter
 import java.util.Calendar
 import java.util.Locale
 import java.util.TimeZone
+import kotlin.math.max
+import kotlin.math.min
 
 /**
  * Displays the time with the hour positioned above the minutes. (ie: 09 above 30 is 9:30)
@@ -311,7 +312,24 @@ class AnimatableClockView @JvmOverloads constructor(
         )
     }
 
-    private val glyphFilter: GlyphCallback? = null // Add text animation tweak here.
+    // The offset of each glyph from where it should be.
+    private var glyphOffsets = mutableListOf(0.0f, 0.0f, 0.0f, 0.0f)
+
+    private var lastSeenAnimationProgress = 1.0f
+
+    // If the animation is being reversed, the target offset for each glyph for the "stop".
+    private var animationCancelStartPosition = mutableListOf(0.0f, 0.0f, 0.0f, 0.0f)
+    private var animationCancelStopPosition = 0.0f
+
+    // Whether the currently playing animation needed a stop (and thus, is shortened).
+    private var currentAnimationNeededStop = false
+
+    private val glyphFilter: GlyphCallback = { positionedGlyph, _ ->
+        val offset = positionedGlyph.lineNo * DIGITS_PER_LINE + positionedGlyph.glyphIndex
+        if (offset < glyphOffsets.size) {
+            positionedGlyph.x += glyphOffsets[offset]
+        }
+    }
 
     /**
      * Set text style with an optional animation.
@@ -421,6 +439,124 @@ class AnimatableClockView @JvmOverloads constructor(
         pw.println("    time=$time")
     }
 
+    fun moveForSplitShade(fromRect: Rect, toRect: Rect, fraction: Float) {
+        // Do we need to cancel an in-flight animation?
+        // Need to also check against 0.0f here; we can sometimes get two calls with fraction == 0,
+        // which trips up the check otherwise.
+        if (lastSeenAnimationProgress != 1.0f &&
+                lastSeenAnimationProgress != 0.0f &&
+                fraction == 0.0f) {
+            // New animation, but need to stop the old one. Figure out where each glyph currently
+            // is in relation to the box position. After that, use the leading digit's current
+            // position as the stop target.
+            currentAnimationNeededStop = true
+
+            // We assume that the current glyph offsets would be relative to the "from" position.
+            val moveAmount = toRect.left - fromRect.left
+
+            // Remap the current glyph offsets to be relative to the new "end" position, and figure
+            // out the start/end positions for the stop animation.
+            for (i in 0 until NUM_DIGITS) {
+                glyphOffsets[i] = -moveAmount + glyphOffsets[i]
+                animationCancelStartPosition[i] = glyphOffsets[i]
+            }
+
+            // Use the leading digit's offset as the stop position.
+            if (toRect.left > fromRect.left) {
+                // It _was_ moving left
+                animationCancelStopPosition = glyphOffsets[0]
+            } else {
+                // It was moving right
+                animationCancelStopPosition = glyphOffsets[1]
+            }
+        }
+
+        // Is there a cancellation in progress?
+        if (currentAnimationNeededStop && fraction < ANIMATION_CANCELLATION_TIME) {
+            val animationStopProgress = MathUtils.constrainedMap(
+                    0.0f, 1.0f, 0.0f, ANIMATION_CANCELLATION_TIME, fraction
+            )
+
+            // One of the digits has already stopped.
+            val animationStopStep = 1.0f / (NUM_DIGITS - 1)
+
+            for (i in 0 until NUM_DIGITS) {
+                val stopAmount = if (toRect.left > fromRect.left) {
+                    // It was moving left (before flipping)
+                    MOVE_LEFT_DELAYS[i] * animationStopStep
+                } else {
+                    // It was moving right (before flipping)
+                    MOVE_RIGHT_DELAYS[i] * animationStopStep
+                }
+
+                // Leading digit stops immediately.
+                if (stopAmount == 0.0f) {
+                    glyphOffsets[i] = animationCancelStopPosition
+                } else {
+                    val actualStopAmount = MathUtils.constrainedMap(
+                            0.0f, 1.0f, 0.0f, stopAmount, animationStopProgress
+                    )
+                    val easedProgress = MOVE_INTERPOLATOR.getInterpolation(actualStopAmount)
+                    val glyphMoveAmount =
+                            animationCancelStopPosition - animationCancelStartPosition[i]
+                    glyphOffsets[i] =
+                            animationCancelStartPosition[i] + glyphMoveAmount * easedProgress
+                }
+            }
+        } else {
+            // Normal part of the animation.
+            // Do we need to remap the animation progress to take account of the cancellation?
+            val actualFraction = if (currentAnimationNeededStop) {
+                MathUtils.constrainedMap(
+                        0.0f, 1.0f, ANIMATION_CANCELLATION_TIME, 1.0f, fraction
+                )
+            } else {
+                fraction
+            }
+
+            val digitFractions = (0 until NUM_DIGITS).map {
+                // The delay for each digit, in terms of fraction (i.e. the digit should not move
+                // during 0.0 - 0.1).
+                val initialDelay = if (toRect.left > fromRect.left) {
+                    MOVE_RIGHT_DELAYS[it] * MOVE_DIGIT_STEP
+                } else {
+                    MOVE_LEFT_DELAYS[it] * MOVE_DIGIT_STEP
+                }
+
+                val f = MathUtils.constrainedMap(
+                        0.0f, 1.0f,
+                        initialDelay, initialDelay + AVAILABLE_ANIMATION_TIME,
+                        actualFraction
+                )
+                MOVE_INTERPOLATOR.getInterpolation(max(min(f, 1.0f), 0.0f))
+            }
+
+            // Was there an animation halt?
+            val moveAmount = if (currentAnimationNeededStop) {
+                // Only need to animate over the remaining space if the animation was aborted.
+                -animationCancelStopPosition
+            } else {
+                toRect.left.toFloat() - fromRect.left.toFloat()
+            }
+
+            for (i in 0 until NUM_DIGITS) {
+                glyphOffsets[i] = -moveAmount + (moveAmount * digitFractions[i])
+            }
+        }
+
+        invalidate()
+
+        if (fraction == 1.0f) {
+            // Reset
+            currentAnimationNeededStop = false
+        }
+
+        lastSeenAnimationProgress = fraction
+
+        // Ensure that the actual clock container is always in the "end" position.
+        this.setLeftTopRightBottom(toRect.left, toRect.top, toRect.right, toRect.bottom)
+    }
+
     // DateFormat.getBestDateTimePattern is extremely expensive, and refresh is called often.
     // This is an optimization to ensure we only recompute the patterns when the inputs change.
     private object Patterns {
@@ -458,5 +594,36 @@ class AnimatableClockView @JvmOverloads constructor(
         private const val APPEAR_ANIM_DURATION: Long = 350
         private const val CHARGE_ANIM_DURATION_PHASE_0: Long = 500
         private const val CHARGE_ANIM_DURATION_PHASE_1: Long = 1000
+
+        // Constants for the animation
+        private val MOVE_INTERPOLATOR = Interpolators.STANDARD
+
+        // Calculate the positions of all of the digits...
+        // Offset each digit by, say, 0.1
+        // This means that each digit needs to move over a slice of "fractions", i.e. digit 0 should
+        // move from 0.0 - 0.7, digit 1 from 0.1 - 0.8, digit 2 from 0.2 - 0.9, and digit 3
+        // from 0.3 - 1.0.
+        private const val NUM_DIGITS = 4
+        private const val DIGITS_PER_LINE = 2
+
+        // How much of "fraction" to spend on canceling the animation, if needed
+        private const val ANIMATION_CANCELLATION_TIME = 0.4f
+
+        // Delays. Each digit's animation should have a slight delay, so we get a nice
+        // "stepping" effect. When moving right, the second digit of the hour should move first.
+        // When moving left, the first digit of the hour should move first. The lists encode
+        // the delay for each digit (hour[0], hour[1], minute[0], minute[1]), to be multiplied
+        // by delayMultiplier.
+        private val MOVE_LEFT_DELAYS = listOf(0, 1, 2, 3)
+        private val MOVE_RIGHT_DELAYS = listOf(1, 0, 3, 2)
+
+        // How much delay to apply to each subsequent digit. This is measured in terms of "fraction"
+        // (i.e. a value of 0.1 would cause a digit to wait until fraction had hit 0.1, or 0.2 etc
+        // before moving).
+        private const val MOVE_DIGIT_STEP = 0.1f
+
+        // Total available transition time for each digit, taking into account the step. If step is
+        // 0.1, then digit 0 would animate over 0.0 - 0.7, making availableTime 0.7.
+        private val AVAILABLE_ANIMATION_TIME = 1.0f - MOVE_DIGIT_STEP * (NUM_DIGITS - 1)
     }
 }
diff --git a/packages/SystemUI/shared/src/com/android/systemui/shared/clocks/DefaultClockController.kt b/packages/SystemUI/shared/src/com/android/systemui/shared/clocks/DefaultClockController.kt
index b88795157a43e..6fd61daee6ffe 100644
--- a/packages/SystemUI/shared/src/com/android/systemui/shared/clocks/DefaultClockController.kt
+++ b/packages/SystemUI/shared/src/com/android/systemui/shared/clocks/DefaultClockController.kt
@@ -16,6 +16,7 @@ package com.android.systemui.shared.clocks
 import android.content.Context
 import android.content.res.Resources
 import android.graphics.Color
+import android.graphics.Rect
 import android.icu.text.NumberFormat
 import android.util.TypedValue
 import android.view.LayoutInflater
@@ -130,6 +131,10 @@ class DefaultClockController(
             lp.topMargin = (-0.5f * view.bottom).toInt()
             view.setLayoutParams(lp)
         }
+
+        fun moveForSplitShade(fromRect: Rect, toRect: Rect, fraction: Float) {
+            view.moveForSplitShade(fromRect, toRect, fraction)
+        }
     }
 
     inner class DefaultClockEvents : ClockEvents {
@@ -209,6 +214,13 @@ class DefaultClockController(
                 clocks.forEach { it.animateDoze(dozeState.isActive, !hasJumped) }
             }
         }
+
+        override fun onPositionUpdated(fromRect: Rect, toRect: Rect, fraction: Float) {
+            largeClock.moveForSplitShade(fromRect, toRect, fraction)
+        }
+
+        override val hasCustomPositionUpdatedAnimation: Boolean
+            get() = true
     }
 
     private class AnimationState(
diff --git a/packages/SystemUI/src/com/android/keyguard/KeyguardClockSwitchController.java b/packages/SystemUI/src/com/android/keyguard/KeyguardClockSwitchController.java
index b450ec35db322..20d064b960d26 100644
--- a/packages/SystemUI/src/com/android/keyguard/KeyguardClockSwitchController.java
+++ b/packages/SystemUI/src/com/android/keyguard/KeyguardClockSwitchController.java
@@ -40,6 +40,7 @@ import com.android.systemui.dump.DumpManager;
 import com.android.systemui.flags.FeatureFlags;
 import com.android.systemui.flags.Flags;
 import com.android.systemui.keyguard.KeyguardUnlockAnimationController;
+import com.android.systemui.plugins.ClockAnimations;
 import com.android.systemui.plugins.ClockController;
 import com.android.systemui.plugins.statusbar.StatusBarStateController;
 import com.android.systemui.shared.clocks.ClockRegistry;
@@ -404,5 +405,9 @@ public class KeyguardClockSwitchController extends ViewController<KeyguardClockS
             clock.dump(pw);
         }
     }
-}
 
+    /** Gets the animations for the current clock. */
+    public ClockAnimations getClockAnimations() {
+        return getClock().getAnimations();
+    }
+}
diff --git a/packages/SystemUI/src/com/android/keyguard/KeyguardStatusViewController.java b/packages/SystemUI/src/com/android/keyguard/KeyguardStatusViewController.java
index e9f06eddf2612..784974778af57 100644
--- a/packages/SystemUI/src/com/android/keyguard/KeyguardStatusViewController.java
+++ b/packages/SystemUI/src/com/android/keyguard/KeyguardStatusViewController.java
@@ -20,6 +20,7 @@ import android.graphics.Rect;
 import android.util.Slog;
 
 import com.android.keyguard.KeyguardClockSwitch.ClockSize;
+import com.android.systemui.plugins.ClockAnimations;
 import com.android.systemui.statusbar.notification.AnimatableProperty;
 import com.android.systemui.statusbar.notification.PropertyAnimator;
 import com.android.systemui.statusbar.notification.stack.AnimationProperties;
@@ -232,4 +233,9 @@ public class KeyguardStatusViewController extends ViewController<KeyguardStatusV
             mView.setClipBounds(null);
         }
     }
+
+    /** Gets the animations for the current clock. */
+    public ClockAnimations getClockAnimations() {
+        return mKeyguardClockSwitchController.getClockAnimations();
+    }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/flags/Flags.java b/packages/SystemUI/src/com/android/systemui/flags/Flags.java
index 3dbadb0f07c93..3968a0d50edd0 100644
--- a/packages/SystemUI/src/com/android/systemui/flags/Flags.java
+++ b/packages/SystemUI/src/com/android/systemui/flags/Flags.java
@@ -129,6 +129,12 @@ public class Flags {
      */
     public static final ReleasedFlag USER_CONTROLLER_USES_INTERACTOR = new ReleasedFlag(211);
 
+    /**
+     * Whether the clock on a wide lock screen should use the new "stepping" animation for moving
+     * the digits when the clock moves.
+     */
+    public static final UnreleasedFlag STEP_CLOCK_ANIMATION = new UnreleasedFlag(211);
+
     /***************************************/
     // 300 - power menu
     public static final ReleasedFlag POWER_MENU_LITE =
diff --git a/packages/SystemUI/src/com/android/systemui/shade/NotificationPanelViewController.java b/packages/SystemUI/src/com/android/systemui/shade/NotificationPanelViewController.java
index e3318127af931..b0bc6b8bff89b 100644
--- a/packages/SystemUI/src/com/android/systemui/shade/NotificationPanelViewController.java
+++ b/packages/SystemUI/src/com/android/systemui/shade/NotificationPanelViewController.java
@@ -79,7 +79,10 @@ import android.os.UserManager;
 import android.os.VibrationEffect;
 import android.provider.Settings;
 import android.transition.ChangeBounds;
+import android.transition.Transition;
 import android.transition.TransitionManager;
+import android.transition.TransitionSet;
+import android.transition.TransitionValues;
 import android.util.IndentingPrintWriter;
 import android.util.Log;
 import android.util.MathUtils;
@@ -1664,9 +1667,40 @@ public final class NotificationPanelViewController {
                     // horizontally properly.
                     transition.excludeTarget(R.id.status_view_media_container, true);
                 }
+
                 transition.setInterpolator(Interpolators.FAST_OUT_SLOW_IN);
                 transition.setDuration(StackStateAnimator.ANIMATION_DURATION_STANDARD);
-                TransitionManager.beginDelayedTransition(mNotificationContainerParent, transition);
+
+                boolean customClockAnimation =
+                        mKeyguardStatusViewController
+                                .getClockAnimations()
+                                .getHasCustomPositionUpdatedAnimation();
+
+                if (mFeatureFlags.isEnabled(Flags.STEP_CLOCK_ANIMATION) && customClockAnimation) {
+                    // Find the clock, so we can exclude it from this transition.
+                    FrameLayout clockContainerView =
+                            mView.findViewById(R.id.lockscreen_clock_view_large);
+                    View clockView = clockContainerView.getChildAt(0);
+
+                    transition.excludeTarget(clockView, /* exclude= */ true);
+
+                    TransitionSet set = new TransitionSet();
+                    set.addTransition(transition);
+
+                    SplitShadeTransitionAdapter adapter =
+                            new SplitShadeTransitionAdapter(mKeyguardStatusViewController);
+
+                    // Use linear here, so the actual clock can pick its own interpolator.
+                    adapter.setInterpolator(Interpolators.LINEAR);
+                    adapter.setDuration(StackStateAnimator.ANIMATION_DURATION_STANDARD);
+                    adapter.addTarget(clockView);
+                    set.addTransition(adapter);
+
+                    TransitionManager.beginDelayedTransition(mNotificationContainerParent, set);
+                } else {
+                    TransitionManager.beginDelayedTransition(
+                            mNotificationContainerParent, transition);
+                }
             }
 
             constraintSet.applyTo(mNotificationContainerParent);
@@ -6238,4 +6272,54 @@ public final class NotificationPanelViewController {
             loadDimens();
         }
     }
+
+    static class SplitShadeTransitionAdapter extends Transition {
+        private static final String PROP_BOUNDS = "splitShadeTransitionAdapter:bounds";
+        private static final String[] TRANSITION_PROPERTIES = { PROP_BOUNDS };
+
+        private final KeyguardStatusViewController mController;
+
+        SplitShadeTransitionAdapter(KeyguardStatusViewController controller) {
+            mController = controller;
+        }
+
+        private void captureValues(TransitionValues transitionValues) {
+            Rect boundsRect = new Rect();
+            boundsRect.left = transitionValues.view.getLeft();
+            boundsRect.top = transitionValues.view.getTop();
+            boundsRect.right = transitionValues.view.getRight();
+            boundsRect.bottom = transitionValues.view.getBottom();
+            transitionValues.values.put(PROP_BOUNDS, boundsRect);
+        }
+
+        @Override
+        public void captureEndValues(TransitionValues transitionValues) {
+            captureValues(transitionValues);
+        }
+
+        @Override
+        public void captureStartValues(TransitionValues transitionValues) {
+            captureValues(transitionValues);
+        }
+
+        @Override
+        public Animator createAnimator(ViewGroup sceneRoot, TransitionValues startValues,
+                TransitionValues endValues) {
+            ValueAnimator anim = ValueAnimator.ofFloat(0, 1);
+
+            Rect from = (Rect) startValues.values.get(PROP_BOUNDS);
+            Rect to = (Rect) endValues.values.get(PROP_BOUNDS);
+
+            anim.addUpdateListener(
+                    animation -> mController.getClockAnimations().onPositionUpdated(
+                            from, to, animation.getAnimatedFraction()));
+
+            return anim;
+        }
+
+        @Override
+        public String[] getTransitionProperties() {
+            return TRANSITION_PROPERTIES;
+        }
+    }
 }
diff --git a/packages/SystemUI/tests/src/com/android/keyguard/KeyguardClockSwitchControllerTest.java b/packages/SystemUI/tests/src/com/android/keyguard/KeyguardClockSwitchControllerTest.java
index 400caa3a352a4..9b2bba6121065 100644
--- a/packages/SystemUI/tests/src/com/android/keyguard/KeyguardClockSwitchControllerTest.java
+++ b/packages/SystemUI/tests/src/com/android/keyguard/KeyguardClockSwitchControllerTest.java
@@ -29,6 +29,7 @@ import static org.mockito.Mockito.when;
 
 import android.content.res.Resources;
 import android.database.ContentObserver;
+import android.graphics.Rect;
 import android.net.Uri;
 import android.os.UserHandle;
 import android.provider.Settings;
@@ -45,6 +46,7 @@ import com.android.systemui.SysuiTestCase;
 import com.android.systemui.dump.DumpManager;
 import com.android.systemui.flags.FeatureFlags;
 import com.android.systemui.keyguard.KeyguardUnlockAnimationController;
+import com.android.systemui.plugins.ClockAnimations;
 import com.android.systemui.plugins.ClockController;
 import com.android.systemui.plugins.statusbar.StatusBarStateController;
 import com.android.systemui.shared.clocks.AnimatableClockView;
@@ -262,6 +264,19 @@ public class KeyguardClockSwitchControllerTest extends SysuiTestCase {
         verify(mView).switchToClock(KeyguardClockSwitch.SMALL, /* animate */ true);
     }
 
+    @Test
+    public void testGetClockAnimationsForwardsToClock() {
+        ClockController mockClockController = mock(ClockController.class);
+        ClockAnimations mockClockAnimations = mock(ClockAnimations.class);
+        when(mClockEventController.getClock()).thenReturn(mockClockController);
+        when(mockClockController.getAnimations()).thenReturn(mockClockAnimations);
+
+        Rect r1 = new Rect(1, 2, 3, 4);
+        Rect r2 = new Rect(5, 6, 7, 8);
+        mController.getClockAnimations().onPositionUpdated(r1, r2, 0.2f);
+        verify(mockClockAnimations).onPositionUpdated(r1, r2, 0.2f);
+    }
+
     private void verifyAttachment(VerificationMode times) {
         verify(mClockRegistry, times).registerClockChangeListener(
                 any(ClockRegistry.ClockChangeListener.class));
diff --git a/packages/SystemUI/tests/src/com/android/keyguard/KeyguardStatusViewControllerTest.java b/packages/SystemUI/tests/src/com/android/keyguard/KeyguardStatusViewControllerTest.java
index 4dcaa7cf8c09f..c94c97c9b638c 100644
--- a/packages/SystemUI/tests/src/com/android/keyguard/KeyguardStatusViewControllerTest.java
+++ b/packages/SystemUI/tests/src/com/android/keyguard/KeyguardStatusViewControllerTest.java
@@ -16,12 +16,16 @@
 
 package com.android.keyguard;
 
+import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
 
+import android.graphics.Rect;
 import android.test.suitebuilder.annotation.SmallTest;
 import android.testing.AndroidTestingRunner;
 
 import com.android.systemui.SysuiTestCase;
+import com.android.systemui.plugins.ClockAnimations;
 import com.android.systemui.statusbar.phone.DozeParameters;
 import com.android.systemui.statusbar.phone.ScreenOffAnimationController;
 import com.android.systemui.statusbar.policy.ConfigurationController;
@@ -108,4 +112,16 @@ public class KeyguardStatusViewControllerTest extends SysuiTestCase {
         configurationListenerArgumentCaptor.getValue().onLocaleListChanged();
         verify(mKeyguardClockSwitchController).onLocaleListChanged();
     }
+
+    @Test
+    public void getClockAnimations_forwardsToClockSwitch() {
+        ClockAnimations mockClockAnimations = mock(ClockAnimations.class);
+        when(mKeyguardClockSwitchController.getClockAnimations()).thenReturn(mockClockAnimations);
+
+        Rect r1 = new Rect(1, 2, 3, 4);
+        Rect r2 = new Rect(5, 6, 7, 8);
+        mController.getClockAnimations().onPositionUpdated(r1, r2, 0.3f);
+
+        verify(mockClockAnimations).onPositionUpdated(r1, r2, 0.3f);
+    }
 }