Allow accessibility talk back resize widgets (b6c1e106) · Commits · e / os / android_frameworks_base

packages/SystemUI/compose/features/src/com/android/systemui/communal/ui/compose/CommunalHub.kt

+46 −0

Original line number	Diff line number	Diff line
		@@ -181,9 +181,11 @@ import com.android.systemui.communal.ui.viewmodel.BaseCommunalViewModel
		import com.android.systemui.communal.ui.viewmodel.CommunalEditModeViewModel
		import com.android.systemui.communal.ui.viewmodel.CommunalViewModel
		import com.android.systemui.communal.ui.viewmodel.ResizeInfo
		import com.android.systemui.communal.ui.viewmodel.ResizeableItemFrameViewModel
		import com.android.systemui.communal.util.DensityUtils.Companion.adjustedDp
		import com.android.systemui.communal.widgets.SmartspaceAppWidgetHostView
		import com.android.systemui.communal.widgets.WidgetConfigurator
		import com.android.systemui.lifecycle.rememberViewModel
		import com.android.systemui.res.R
		import com.android.systemui.statusbar.phone.SystemUIDialogFactory
		import kotlin.math.max
		@@ -665,6 +667,7 @@ private fun ResizableItemFrameWrapper(
		maxHeightPx: Int,
		modifier: Modifier = Modifier,
		alpha: () -> Float = { 1f },
		viewModel: ResizeableItemFrameViewModel,
		onResize: (info: ResizeInfo) -> Unit = {},
		content: @Composable (modifier: Modifier) -> Unit,
		) {
		@@ -680,6 +683,7 @@ private fun ResizableItemFrameWrapper(
		enabled = enabled,
		alpha = alpha,
		modifier = modifier,
		viewModel = viewModel,
		onResize = onResize,
		minHeightPx = minHeightPx,
		maxHeightPx = maxHeightPx,
		@@ -796,6 +800,14 @@ private fun BoxScope.CommunalHubLazyGrid(
		false
		}

		val resizeableItemFrameViewModel =
		rememberViewModel(
		key = item.size.span,
		traceName = "ResizeableItemFrame.viewModel.$index",
		) {
		ResizeableItemFrameViewModel()
		}

		if (viewModel.isEditMode && dragDropState != null) {
		val isItemDragging = dragDropState.draggingItemKey == item.key
		val outlineAlpha by
		@@ -821,6 +833,7 @@ private fun BoxScope.CommunalHubLazyGrid(
		)
		}
		.thenIf(isItemDragging) { Modifier.zIndex(1f) },
		viewModel = resizeableItemFrameViewModel,
		onResize = { resizeInfo -> contentListState.resize(index, resizeInfo) },
		minHeightPx = widgetSizeInfo.minHeightPx,
		maxHeightPx = widgetSizeInfo.maxHeightPx,
		@@ -843,6 +856,7 @@ private fun BoxScope.CommunalHubLazyGrid(
		contentListState = contentListState,
		interactionHandler = interactionHandler,
		widgetSection = widgetSection,
		resizeableItemFrameViewModel = resizeableItemFrameViewModel,
		)
		}
		}
		@@ -857,6 +871,7 @@ private fun BoxScope.CommunalHubLazyGrid(
		contentListState = contentListState,
		interactionHandler = interactionHandler,
		widgetSection = widgetSection,
		resizeableItemFrameViewModel = resizeableItemFrameViewModel,
		)
		}
		}
		@@ -1080,6 +1095,7 @@ private fun CommunalContent(
		contentListState: ContentListState,
		interactionHandler: RemoteViews.InteractionHandler?,
		widgetSection: CommunalAppWidgetSection,
		resizeableItemFrameViewModel: ResizeableItemFrameViewModel,
		) {
		when (model) {
		is CommunalContentModel.WidgetContent.Widget ->
		@@ -1093,6 +1109,7 @@ private fun CommunalContent(
		index,
		contentListState,
		widgetSection,
		resizeableItemFrameViewModel,
		)
		is CommunalContentModel.WidgetPlaceholder -> HighlightedItem(modifier)
		is CommunalContentModel.WidgetContent.DisabledWidget ->
		@@ -1223,7 +1240,9 @@ private fun WidgetContent(
		index: Int,
		contentListState: ContentListState,
		widgetSection: CommunalAppWidgetSection,
		resizeableItemFrameViewModel: ResizeableItemFrameViewModel,
		) {
		val coroutineScope = rememberCoroutineScope()
		val context = LocalContext.current
		val accessibilityLabel =
		remember(model, context) {
		@@ -1234,6 +1253,10 @@ private fun WidgetContent(
		val placeWidgetActionLabel = stringResource(R.string.accessibility_action_label_place_widget)
		val unselectWidgetActionLabel =
		stringResource(R.string.accessibility_action_label_unselect_widget)

		val shrinkWidgetLabel = stringResource(R.string.accessibility_action_label_shrink_widget)
		val expandWidgetLabel = stringResource(R.string.accessibility_action_label_expand_widget)

		val selectedKey by viewModel.selectedKey.collectAsStateWithLifecycle()
		val selectedIndex =
		selectedKey?.let { key -> contentListState.list.indexOfFirst { it.key == key } }
		@@ -1292,6 +1315,29 @@ private fun WidgetContent(
		true
		}
		val actions = mutableListOf(deleteAction)

		if (communalWidgetResizing() && resizeableItemFrameViewModel.canShrink()) {
		actions.add(
		CustomAccessibilityAction(shrinkWidgetLabel) {
		coroutineScope.launch {
		resizeableItemFrameViewModel.shrinkToNextAnchor()
		}
		true
		}
		)
		}

		if (communalWidgetResizing() && resizeableItemFrameViewModel.canExpand()) {
		actions.add(
		CustomAccessibilityAction(expandWidgetLabel) {
		coroutineScope.launch {
		resizeableItemFrameViewModel.expandToNextAnchor()
		}
		true
		}
		)
		}

		if (selectedIndex != null && selectedIndex != index) {
		actions.add(
		CustomAccessibilityAction(placeWidgetActionLabel) {

packages/SystemUI/compose/features/src/com/android/systemui/communal/ui/compose/ResizeableItemFrame.kt

+1 −6

Original line number	Diff line number	Diff line
		@@ -56,7 +56,6 @@ import com.android.compose.modifiers.thenIf
		import com.android.systemui.communal.ui.viewmodel.DragHandle
		import com.android.systemui.communal.ui.viewmodel.ResizeInfo
		import com.android.systemui.communal.ui.viewmodel.ResizeableItemFrameViewModel
		import com.android.systemui.lifecycle.rememberViewModel
		import kotlinx.coroutines.flow.collectLatest
		import kotlinx.coroutines.flow.combine

		@@ -192,16 +191,12 @@ fun ResizableItemFrame(
		maxHeightPx: Int = Int.MAX_VALUE,
		resizeMultiple: Int = 1,
		alpha: () -> Float = { 1f },
		viewModel: ResizeableItemFrameViewModel,
		onResize: (info: ResizeInfo) -> Unit = {},
		content: @Composable () -> Unit,
		) {
		val brush = SolidColor(outlineColor)
		val onResizeUpdated by rememberUpdatedState(onResize)
		val viewModel =
		rememberViewModel(key = currentSpan, traceName = "ResizeableItemFrame.viewModel") {
		ResizeableItemFrameViewModel()
		}

		val dragHandleHeight = verticalArrangement.spacing - outlinePadding * 2
		val isDragging by
		remember(viewModel) {

packages/SystemUI/multivalentTests/src/com/android/systemui/communal/ui/viewmodel/ResizeableItemFrameViewModelTest.kt

+100 −0

Original line number	Diff line number	Diff line
		@@ -366,6 +366,106 @@ class ResizeableItemFrameViewModelTest : SysuiTestCase() {
		assertThat(bottomState.anchors.toList()).containsExactly(0 to 0f)
		}

		@Test
		fun testCanExpand_atTopPosition_withMultipleAnchors_returnsTrue() =
		testScope.runTest {
		val twoRowGrid = singleSpanGrid.copy(totalSpans = 2, currentSpan = 1, currentRow = 0)

		updateGridLayout(twoRowGrid)
		assertThat(underTest.canExpand()).isTrue()
		assertThat(underTest.bottomDragState.anchors.toList())
		.containsAtLeast(0 to 0f, 1 to 45f)
		}

		@Test
		fun testCanExpand_atTopPosition_withSingleAnchors_returnsFalse() =
		testScope.runTest {
		val oneRowGrid = singleSpanGrid.copy(totalSpans = 1, currentSpan = 1, currentRow = 0)
		updateGridLayout(oneRowGrid)
		assertThat(underTest.canExpand()).isFalse()
		}

		@Test
		fun testCanExpand_atBottomPosition_withMultipleAnchors_returnsTrue() =
		testScope.runTest {
		val twoRowGrid = singleSpanGrid.copy(totalSpans = 2, currentSpan = 1, currentRow = 1)
		updateGridLayout(twoRowGrid)
		assertThat(underTest.canExpand()).isTrue()
		assertThat(underTest.topDragState.anchors.toList()).containsAtLeast(0 to 0f, -1 to -45f)
		}

		@Test
		fun testCanShrink_atMinimumHeight_returnsFalse() =
		testScope.runTest {
		val oneRowGrid = singleSpanGrid.copy(totalSpans = 1, currentSpan = 1, currentRow = 0)
		updateGridLayout(oneRowGrid)
		assertThat(underTest.canShrink()).isFalse()
		}

		@Test
		fun testCanShrink_atFullSize_checksBottomDragState() = runTestWithSnapshots {
		val twoSpanGrid = singleSpanGrid.copy(totalSpans = 2, currentSpan = 2, currentRow = 0)
		updateGridLayout(twoSpanGrid)

		assertThat(underTest.canShrink()).isTrue()
		assertThat(underTest.bottomDragState.anchors.toList()).containsAtLeast(0 to 0f, -1 to -45f)
		}

		@Test
		fun testResizeByAccessibility_expandFromBottom_usesTopDragState() = runTestWithSnapshots {
		val resizeInfo by collectLastValue(underTest.resizeInfo)

		val twoSpanGrid = singleSpanGrid.copy(totalSpans = 2, currentSpan = 1, currentRow = 1)
		updateGridLayout(twoSpanGrid)

		underTest.expandToNextAnchor()

		assertThat(resizeInfo).isEqualTo(ResizeInfo(1, DragHandle.TOP))
		}

		@Test
		fun testResizeByAccessibility_expandFromTop_usesBottomDragState() = runTestWithSnapshots {
		val resizeInfo by collectLastValue(underTest.resizeInfo)

		val twoSpanGrid = singleSpanGrid.copy(totalSpans = 2, currentSpan = 1, currentRow = 0)
		updateGridLayout(twoSpanGrid)

		underTest.expandToNextAnchor()

		assertThat(resizeInfo).isEqualTo(ResizeInfo(1, DragHandle.BOTTOM))
		}

		@Test
		fun testResizeByAccessibility_shrinkFromFull_usesBottomDragState() = runTestWithSnapshots {
		val resizeInfo by collectLastValue(underTest.resizeInfo)

		val twoSpanGrid = singleSpanGrid.copy(totalSpans = 2, currentSpan = 2, currentRow = 0)
		updateGridLayout(twoSpanGrid)

		underTest.shrinkToNextAnchor()

		assertThat(resizeInfo).isEqualTo(ResizeInfo(-1, DragHandle.BOTTOM))
		}

		@Test
		fun testResizeByAccessibility_cannotResizeAtMinSize() = runTestWithSnapshots {
		val resizeInfo by collectLastValue(underTest.resizeInfo)

		// Set up grid at minimum size
		val minSizeGrid =
		singleSpanGrid.copy(
		totalSpans = 2,
		currentSpan = 1,
		minHeightPx = singleSpanGrid.minHeightPx,
		currentRow = 0,
		)
		updateGridLayout(minSizeGrid)

		underTest.shrinkToNextAnchor()

		assertThat(resizeInfo).isNull()
		}

		@Test(expected = IllegalArgumentException::class)
		fun testIllegalState_maxHeightLessThanMinHeight() =
		testScope.runTest {

packages/SystemUI/res/values/strings.xml

+4 −0

Original line number	Diff line number	Diff line
		@@ -1311,6 +1311,10 @@
		<string name="communal_widget_picker_description">Anyone can view widgets on your lock screen, even if your tablet\'s locked.</string>
		<!-- Label for accessibility action to unselect a widget in edit mode. [CHAR LIMIT=NONE] -->
		<string name="accessibility_action_label_unselect_widget">unselect widget</string>
		<!-- Label for accessibility action to shrink a widget in edit mode. [CHAR LIMIT=NONE] -->
		<string name="accessibility_action_label_shrink_widget">Decrease height</string>
		<!-- Label for accessibility action to expand a widget in edit mode. [CHAR LIMIT=NONE] -->
		<string name="accessibility_action_label_expand_widget">Increase height</string>
		<!-- Title shown above information regarding lock screen widgets. [CHAR LIMIT=50] -->
		<string name="communal_widgets_disclaimer_title">Lock screen widgets</string>
		<!-- Information about lock screen widgets presented to the user. [CHAR LIMIT=NONE] -->

packages/SystemUI/src/com/android/systemui/communal/ui/viewmodel/ResizeableItemFrameViewModel.kt

+67 −0

Original line number	Diff line number	Diff line
		@@ -17,6 +17,7 @@ package com.android.systemui.communal.ui.viewmodel

		import androidx.compose.foundation.gestures.AnchoredDraggableState
		import androidx.compose.foundation.gestures.DraggableAnchors
		import androidx.compose.foundation.gestures.snapTo
		import androidx.compose.runtime.snapshotFlow
		import com.android.app.tracing.coroutines.coroutineScopeTraced as coroutineScope
		import com.android.systemui.lifecycle.ExclusiveActivatable
		@@ -81,6 +82,72 @@ class ResizeableItemFrameViewModel : ExclusiveActivatable() {
		get() = roundDownToMultiple(getSpansForPx(minHeightPx))
		}

		/** Check if widget can expanded based on current drag states */
		fun canExpand(): Boolean {
		return getNextAnchor(bottomDragState, moveUp = false) != null \|\|
		getNextAnchor(topDragState, moveUp = true) != null
		}

		/** Check if widget can shrink based on current drag states */
		fun canShrink(): Boolean {
		return getNextAnchor(bottomDragState, moveUp = true) != null \|\|
		getNextAnchor(topDragState, moveUp = false) != null
		}

		/** Get the next anchor value in the specified direction */
		private fun getNextAnchor(state: AnchoredDraggableState<Int>, moveUp: Boolean): Int? {
		var nextAnchor: Int? = null
		var nextAnchorDiff = Int.MAX_VALUE
		val currentValue = state.currentValue

		for (i in 0 until state.anchors.size) {
		val anchor = state.anchors.anchorAt(i) ?: continue
		if (anchor == currentValue) continue

		val diff =
		if (moveUp) {
		currentValue - anchor
		} else {
		anchor - currentValue
		}

		if (diff in 1..<nextAnchorDiff) {
		nextAnchor = anchor
		nextAnchorDiff = diff
		}
		}

		return nextAnchor
		}

		/** Handle expansion to the next anchor */
		suspend fun expandToNextAnchor() {
		if (!canExpand()) return
		val bottomAnchor = getNextAnchor(state = bottomDragState, moveUp = false)
		if (bottomAnchor != null) {
		bottomDragState.snapTo(bottomAnchor)
		return
		}
		val topAnchor =
		getNextAnchor(
		state = topDragState,
		moveUp = true, // Moving up to expand
		)
		topAnchor?.let { topDragState.snapTo(it) }
		}

		/** Handle shrinking to the next anchor */
		suspend fun shrinkToNextAnchor() {
		if (!canShrink()) return
		val topAnchor = getNextAnchor(state = topDragState, moveUp = false)
		if (topAnchor != null) {
		topDragState.snapTo(topAnchor)
		return
		}
		val bottomAnchor = getNextAnchor(state = bottomDragState, moveUp = true)
		bottomAnchor?.let { bottomDragState.snapTo(it) }
		}

		/**
		* The layout information necessary in order to calculate the pixel offsets of the drag anchor
		* points.