[Flexiglass] Determine the z position of HUNs with the SceneContainer stack (9fd5292c) · Commits · e / os / android_frameworks_base

packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/StackScrollAlgorithm.java

+103 −45

Original line number	Diff line number	Diff line
		@@ -16,6 +16,8 @@

		package com.android.systemui.statusbar.notification.stack;

		import static androidx.core.math.MathUtils.clamp;

		import android.annotation.NonNull;
		import android.annotation.Nullable;
		import android.content.Context;
		@@ -899,11 +901,33 @@ public class StackScrollAlgorithm {
		if (shouldHunBeVisibleWhenScrolled(row.mustStayOnScreen(),
		childState.headsUpIsVisible, row.showingPulsing(),
		ambientState.isOnKeyguard(), row.getEntry().isStickyAndNotDemoted())) {
		// the height of this child before clamping it to the top
		float unmodifiedChildHeight = childState.height;
		clampHunToTop(
		/* headsUpTop = */ headsUpTranslation,
		/* collapsedHeight = */ row.getCollapsedHeight(),
		/* viewState = */ childState
		);
		float baseZ = ambientState.getBaseZHeight();
		if (headsUpTranslation < ambientState.getStackTop()) {
		// HUN displayed above the stack top, it needs a fix shadow
		childState.setZTranslation(baseZ + mPinnedZTranslationExtra);
		} else {
		// HUN displayed within the stack, add a shadow if it overlaps with
		// other elements.
		//
		// Views stack vertically from the top. Add the HUN's original height
		// (before clamping) to the stack top, to determine the starting
		// point for the remaining content.
		float scrollingContentTop =
		ambientState.getStackTop() + unmodifiedChildHeight;
		updateZTranslationForHunInStack(
		/* scrollingContentTop = */ scrollingContentTop,
		/* scrollingContentTopPadding = */ mGapHeight,
		/* baseZ = */ baseZ,
		/* viewState = */ childState
		);
		}
		if (isTopEntry && row.isAboveShelf()) {
		clampHunToMaxTranslation(
		/* headsUpTop = */ headsUpTranslation,
		@@ -1040,8 +1064,30 @@ public class StackScrollAlgorithm {
		// Transition from collapsed pinned state to fully expanded state
		// when the pinned HUN approaches its actual location (when scrolling back to top).
		final float distToRealY = newTranslation - viewState.getYTranslation();
		viewState.height = (int) Math.max(viewState.height - distToRealY, collapsedHeight);
		final float availableHeight = viewState.height - distToRealY;

		viewState.setYTranslation(newTranslation);
		viewState.height = (int) Math.max(availableHeight, collapsedHeight);
		}

		@VisibleForTesting
		void updateZTranslationForHunInStack(float scrollingContentTop,
		float scrollingContentTopPadding, float baseZ, ExpandableViewState viewState) {
		if (SceneContainerFlag.isUnexpectedlyInLegacyMode()) return;
		float hunBottom = viewState.getYTranslation() + viewState.height;
		float overlap = Math.max(0f, hunBottom - scrollingContentTop);

		float shadowFraction = 1f;
		if (scrollingContentTopPadding > 0f) {
		// scrollingContentTopPadding makes a gap between the bottom of the HUN and the top
		// of the scrolling content. Use this to animate to the full shadow.
		shadowFraction = clamp(overlap / scrollingContentTopPadding, 0f, 1f);
		}

		if (overlap > 0.0f) {
		// add a shadow to this HUN, because it overlaps with the scrolling stack
		viewState.setZTranslation(baseZ + shadowFraction * mPinnedZTranslationExtra);
		}
		}

		// Pin HUN to bottom of expanded QS
		@@ -1151,6 +1197,15 @@ public class StackScrollAlgorithm {
		ExpandableViewState childViewState = child.getViewState();
		float baseZ = ambientState.getBaseZHeight();

		if (SceneContainerFlag.isEnabled()) {
		// SceneContainer flags off this logic, and just sets the baseZ because:
		// - there are no overlapping HUNs anymore, no need for multiplying their shadows
		// - shadows for HUNs overlapping with the stack are now set from updateHeadsUpStates
		// - shadows for HUNs overlapping with the shelf are NOT set anymore, because it only
		// happens on AOD/Pulsing, where they're displayed on a black background so a shadow
		// wouldn't be visible.
		childViewState.setZTranslation(baseZ);
		} else {
		if (child.mustStayOnScreen() && !childViewState.headsUpIsVisible
		&& !ambientState.isDozingAndNotPulsing(child)
		&& childViewState.getYTranslation() < ambientState.getTopPadding()
		@@ -1162,7 +1217,7 @@ public class StackScrollAlgorithm {
		} else {
		// Handles HUN shadow when Shade is opened, and AmbientState.mScrollY > 0
		// Calculate the HUN's z-value based on its overlapping fraction with QQS Panel.
		// When scrolling down shade to make HUN back to in-position in Notification Panel,
		// When scrolling down shade to make HUN back to in-position in Notif Panel,
		// The overlapping fraction goes to 0, and shadows hides gradually.
		float overlap = ambientState.getTopPadding()
		+ ambientState.getStackTranslation() - childViewState.getYTranslation();
		@@ -1182,10 +1237,12 @@ public class StackScrollAlgorithm {
		float shelfStart = ambientState.getInnerHeight()
		- shelfHeight + ambientState.getTopPadding()
		+ ambientState.getStackTranslation();
		float notificationEnd = childViewState.getYTranslation() + child.getIntrinsicHeight()
		float notificationEnd =
		childViewState.getYTranslation() + child.getIntrinsicHeight()
		+ mPaddingBetweenElements;
		if (shelfStart > notificationEnd) {
		// When the notification doesn't overlap with Notification Shelf, there's no shadow
		// When the notification doesn't overlap with Notification Shelf,
		// there's no shadow
		childViewState.setZTranslation(baseZ);
		} else {
		// Give shadow to the notification if it overlaps with Notification Shelf
		@@ -1199,6 +1256,7 @@ public class StackScrollAlgorithm {
		} else {
		childViewState.setZTranslation(baseZ);
		}
		}

		// While HUN is showing and Shade is closed: headerVisibleAmount stays 0, shadow stays.
		// During HUN-to-Shade (eg. dragging down HUN to open Shade): headerVisibleAmount goes

packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/StackScrollAlgorithmTest.kt

+91 −2

Original line number	Diff line number	Diff line
		@@ -92,9 +92,12 @@ class StackScrollAlgorithmTest : SysuiTestCase() {
		private fun px(@DimenRes id: Int): Float =
		testableResources.resources.getDimensionPixelSize(id).toFloat()

		private val bigGap = px(R.dimen.notification_section_divider_height)
		private val smallGap = px(R.dimen.notification_section_divider_height_lockscreen)
		private val notifSectionDividerGap = px(R.dimen.notification_section_divider_height)
		private val scrimPadding = px(R.dimen.notification_side_paddings)
		private val baseZ by lazy { ambientState.baseZHeight }
		private val headsUpZ = px(R.dimen.heads_up_pinned_elevation)
		private val bigGap = notifSectionDividerGap
		private val smallGap = px(R.dimen.notification_section_divider_height_lockscreen)

		@Before
		fun setUp() {
		@@ -219,6 +222,8 @@ class StackScrollAlgorithmTest : SysuiTestCase() {

		// Then: HUN is at the headsUpTop
		assertThat(notificationRow.viewState.yTranslation).isEqualTo(headsUpTop)
		// And: HUN is not elevated
		assertThat(notificationRow.viewState.zTranslation).isEqualTo(baseZ)
		// And: HUN has its full height
		assertThat(notificationRow.viewState.height).isEqualTo(intrinsicHeight)
		}
		@@ -243,6 +248,8 @@ class StackScrollAlgorithmTest : SysuiTestCase() {

		// Then: HUN is translated to the headsUpTop
		assertThat(notificationRow.viewState.yTranslation).isEqualTo(headsUpTop)
		// And: HUN is not elevated
		assertThat(notificationRow.viewState.zTranslation).isEqualTo(baseZ)
		// And: HUN is clipped to the available space
		// newTranslation = max(150, -25)
		// distToReal = 150 - (-25)
		@@ -270,6 +277,8 @@ class StackScrollAlgorithmTest : SysuiTestCase() {

		// Then: HUN is translated to the headsUpTop
		assertThat(notificationRow.viewState.yTranslation).isEqualTo(headsUpTop)
		// And: HUN fully elevated to baseZ + headsUpZ
		assertThat(notificationRow.viewState.zTranslation).isEqualTo(baseZ + headsUpZ)
		// And: HUN is clipped to its collapsed height
		assertThat(notificationRow.viewState.height).isEqualTo(collapsedHeight)
		}
		@@ -294,10 +303,87 @@ class StackScrollAlgorithmTest : SysuiTestCase() {

		// Then: HUN is translated to the headsUpTop
		assertThat(notificationRow.viewState.yTranslation).isEqualTo(headsUpTop)
		// And: HUN is elevated to baseZ + headsUpZ
		assertThat(notificationRow.viewState.zTranslation).isEqualTo(baseZ + headsUpZ)
		// And: HUN maintained its full height
		assertThat(notificationRow.viewState.height).isEqualTo(intrinsicHunHeight)
		}

		@Test
		@EnableSceneContainer
		fun updateZTranslationForHunInStack_fullOverlap_hunHasFullElevation() {
		// Given: the overlap equals to the top content padding
		val contentTop = 280f
		val contentTopPadding = 20f
		val viewState =
		ExpandableViewState().apply {
		height = 100
		yTranslation = 200f
		}

		// When
		stackScrollAlgorithm.updateZTranslationForHunInStack(
		/* scrollingContentTop = */ contentTop,
		/* scrollingContentTopPadding */ contentTopPadding,
		/* baseZ = */ 0f,
		/* viewState = */ viewState,
		)

		// Then: HUN is fully elevated to baseZ + headsUpZ
		assertThat(viewState.zTranslation).isEqualTo(headsUpZ)
		}

		@Test
		@EnableSceneContainer
		fun updateZTranslationForHunInStack_someOverlap_hunIsPartlyElevated() {
		// Given: the overlap is bigger than zero, but less than the top content padding
		val contentTop = 290f
		val contentTopPadding = 20f
		val viewState =
		ExpandableViewState().apply {
		height = 100
		yTranslation = 200f
		}

		// When
		stackScrollAlgorithm.updateZTranslationForHunInStack(
		/* scrollingContentTop = */ contentTop,
		/* scrollingContentTopPadding */ contentTopPadding,
		/* baseZ = */ 0f,
		/* viewState = */ viewState,
		)

		// Then: HUN is partly elevated
		assertThat(viewState.zTranslation).apply {
		isGreaterThan(0f)
		isLessThan(headsUpZ)
		}
		}

		@Test
		@EnableSceneContainer
		fun updateZTranslationForHunInStack_noOverlap_hunIsNotElevated() {
		// Given: no overlap between the content and the HUN
		val contentTop = 300f
		val contentTopPadding = 20f
		val viewState =
		ExpandableViewState().apply {
		height = 100
		yTranslation = 200f
		}

		// When
		stackScrollAlgorithm.updateZTranslationForHunInStack(
		/* scrollingContentTop = */ contentTop,
		/* scrollingContentTopPadding */ contentTopPadding,
		/* baseZ = */ 0f,
		/* viewState = */ viewState,
		)

		// Then: HUN is not elevated
		assertThat(viewState.zTranslation).isEqualTo(0f)
		}

		@Test
		@DisableSceneContainer
		@EnableFlags(NotificationsImprovedHunAnimation.FLAG_NAME)
		@@ -971,6 +1057,7 @@ class StackScrollAlgorithmTest : SysuiTestCase() {
		}

		@Test
		@DisableSceneContainer
		fun shadeOpened_hunFullyOverlapsQqsPanel_hunShouldHaveFullShadow() {
		// Given: shade is opened, yTranslation of HUN is 0,
		// the height of HUN equals to the height of QQS Panel,
		@@ -996,6 +1083,7 @@ class StackScrollAlgorithmTest : SysuiTestCase() {
		}

		@Test
		@DisableSceneContainer
		fun shadeOpened_hunPartiallyOverlapsQQS_hunShouldHavePartialShadow() {
		// Given: shade is opened, yTranslation of HUN is greater than 0,
		// the height of HUN is equal to the height of QQS Panel,
		@@ -1447,6 +1535,7 @@ class StackScrollAlgorithmTest : SysuiTestCase() {
		}
		stackScrollAlgorithm.setIsExpanded(true)

		whenever(notificationRow.headerVisibleAmount).thenReturn(1.0f)
		whenever(notificationRow.mustStayOnScreen()).thenReturn(true)
		whenever(notificationRow.isHeadsUp).thenReturn(true)
		whenever(notificationRow.collapsedHeight).thenReturn(collapsedHeight)