| /* |
| * Copyright 2019 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package androidx.compose.foundation.layout |
| |
| import androidx.compose.Composable |
| import androidx.test.filters.SmallTest |
| import androidx.ui.core.Alignment |
| import androidx.ui.core.Constraints |
| import androidx.ui.core.Layout |
| import androidx.ui.core.LayoutCoordinates |
| import androidx.ui.core.Modifier |
| import androidx.ui.core.Ref |
| import androidx.ui.core.enforce |
| import androidx.ui.core.onPositioned |
| import androidx.ui.geometry.Offset |
| import androidx.ui.unit.IntOffset |
| import androidx.ui.unit.IntSize |
| import androidx.ui.unit.dp |
| import org.junit.Assert.assertEquals |
| import org.junit.Assert.assertTrue |
| import org.junit.Test |
| import org.junit.runner.RunWith |
| import org.junit.runners.JUnit4 |
| import java.util.concurrent.CountDownLatch |
| import java.util.concurrent.TimeUnit |
| import kotlin.math.roundToInt |
| |
| @SmallTest |
| @RunWith(JUnit4::class) |
| class LayoutAlignTest : LayoutTest() { |
| @Test |
| fun test2DAlignedModifier() = with(density) { |
| val sizeDp = 50.dp |
| val size = sizeDp.toIntPx() |
| |
| val positionedLatch = CountDownLatch(2) |
| val alignSize = Ref<IntSize>() |
| val alignPosition = Ref<Offset>() |
| val childSize = Ref<IntSize>() |
| val childPosition = Ref<Offset>() |
| show { |
| Container(Modifier.saveLayoutInfo(alignSize, alignPosition, positionedLatch)) { |
| Container( |
| Modifier.fillMaxSize() |
| .wrapContentSize(Alignment.BottomEnd) |
| .preferredSize(sizeDp) |
| .saveLayoutInfo(childSize, childPosition, positionedLatch) |
| ) { |
| } |
| } |
| } |
| assertTrue(positionedLatch.await(1, TimeUnit.SECONDS)) |
| |
| val root = findOwnerView() |
| waitForDraw(root) |
| |
| assertEquals(IntSize(root.width, root.height), alignSize.value) |
| assertEquals(Offset(0f, 0f), alignPosition.value) |
| assertEquals(IntSize(size, size), childSize.value) |
| assertEquals( |
| Offset(root.width - size.toFloat(), root.height - size.toFloat()), |
| childPosition.value |
| ) |
| } |
| |
| @Test |
| fun test1DAlignedModifier() = with(density) { |
| val sizeDp = 50.dp |
| val size = sizeDp.toIntPx() |
| |
| val positionedLatch = CountDownLatch(2) |
| val alignSize = Ref<IntSize>() |
| val alignPosition = Ref<Offset>() |
| val childSize = Ref<IntSize>() |
| val childPosition = Ref<Offset>() |
| show { |
| Container( |
| Modifier.saveLayoutInfo( |
| size = alignSize, |
| position = alignPosition, |
| positionedLatch = positionedLatch |
| ) |
| ) { |
| Container( |
| Modifier.fillMaxSize() |
| .wrapContentWidth(Alignment.End) |
| .preferredWidth(sizeDp) |
| .saveLayoutInfo(childSize, childPosition, positionedLatch) |
| ) { |
| } |
| } |
| } |
| assertTrue(positionedLatch.await(1, TimeUnit.SECONDS)) |
| |
| val root = findOwnerView() |
| waitForDraw(root) |
| |
| assertEquals(IntSize(root.width, root.height), alignSize.value) |
| assertEquals(Offset(0f, 0f), alignPosition.value) |
| assertEquals(IntSize(size, root.height), childSize.value) |
| assertEquals(Offset(root.width - size.toFloat(), 0f), childPosition.value) |
| } |
| |
| @Test |
| fun testAlignedModifier_rtl() = with(density) { |
| val sizeDp = 200.toDp() |
| val size = sizeDp.toIntPx() |
| |
| val positionedLatch = CountDownLatch(3) |
| val childSize = Array(3) { Ref<IntSize>() } |
| val childPosition = Array(3) { Ref<Offset>() } |
| show { |
| Stack(Modifier.rtl) { |
| Stack(Modifier.fillMaxSize().wrapContentSize(Alignment.TopStart)) { |
| Stack( |
| Modifier.preferredSize(sizeDp) |
| .saveLayoutInfo(childSize[0], childPosition[0], positionedLatch) |
| ) { |
| } |
| } |
| Stack(Modifier.fillMaxSize().wrapContentHeight(Alignment.CenterVertically)) { |
| Stack( |
| Modifier.preferredSize(sizeDp) |
| .saveLayoutInfo(childSize[1], childPosition[1], positionedLatch) |
| ) { |
| } |
| } |
| Stack(Modifier.fillMaxSize().wrapContentSize(Alignment.BottomEnd)) { |
| Stack( |
| Modifier.preferredSize(sizeDp) |
| .saveLayoutInfo(childSize[2], childPosition[2], positionedLatch) |
| ) { |
| } |
| } |
| } |
| } |
| assertTrue(positionedLatch.await(1, TimeUnit.SECONDS)) |
| |
| val root = findOwnerView() |
| waitForDraw(root) |
| |
| assertEquals( |
| Offset((root.width - size).toFloat(), 0f), |
| childPosition[0].value |
| ) |
| assertEquals( |
| Offset( |
| (root.width - size).toFloat(), |
| ((root.height - size) / 2).toFloat() |
| ), |
| childPosition[1].value |
| ) |
| assertEquals( |
| Offset(0f, (root.height - size).toFloat()), |
| childPosition[2].value |
| ) |
| } |
| |
| @Test |
| fun testModifier_wrapsContent() = with(density) { |
| val contentSize = 50.dp |
| val size = Ref<IntSize>() |
| val latch = CountDownLatch(1) |
| show { |
| Container { |
| Container(Modifier.saveLayoutInfo(size, Ref(), latch)) { |
| Container( |
| Modifier.wrapContentSize(Alignment.TopStart) |
| .preferredSize(contentSize) |
| ) {} |
| } |
| } |
| } |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| assertEquals(IntSize(contentSize.toIntPx(), contentSize.toIntPx()), size.value) |
| } |
| |
| @Test |
| fun testAlignedModifier_wrapsContent_whenMeasuredWithInfiniteConstraints() = with(density) { |
| val sizeDp = 50.dp |
| val size = sizeDp.toIntPx() |
| |
| val positionedLatch = CountDownLatch(2) |
| val alignSize = Ref<IntSize>() |
| val alignPosition = Ref<Offset>() |
| val childSize = Ref<IntSize>() |
| val childPosition = Ref<Offset>() |
| show { |
| Layout( |
| children = { |
| Container( |
| Modifier.saveLayoutInfo(alignSize, alignPosition, positionedLatch) |
| ) { |
| Container( |
| Modifier.wrapContentSize(Alignment.BottomEnd) |
| .preferredSize(sizeDp) |
| .saveLayoutInfo(childSize, childPosition, positionedLatch) |
| ) { |
| } |
| } |
| }, |
| measureBlock = { measurables, constraints -> |
| val placeable = measurables.first().measure(Constraints()) |
| layout(constraints.maxWidth, constraints.maxHeight) { |
| placeable.place(0, 0) |
| } |
| } |
| ) |
| } |
| assertTrue(positionedLatch.await(1, TimeUnit.SECONDS)) |
| |
| val root = findOwnerView() |
| waitForDraw(root) |
| |
| assertEquals(IntSize(size, size), alignSize.value) |
| assertEquals(Offset(0f, 0f), alignPosition.value) |
| assertEquals(IntSize(size, size), childSize.value) |
| assertEquals(Offset(0f, 0f), childPosition.value) |
| } |
| |
| @Test |
| fun testLayoutAlignModifier_respectsMinConstraints() = with(density) { |
| val sizeDp = 50.dp |
| val size = sizeDp.toIntPx() |
| val doubleSizeDp = sizeDp * 2 |
| val doubleSize = doubleSizeDp.toIntPx() |
| |
| val positionedLatch = CountDownLatch(2) |
| val wrapSize = Ref<IntSize>() |
| val childSize = Ref<IntSize>() |
| val childPosition = Ref<Offset>() |
| show { |
| Container(Modifier.wrapContentSize(Alignment.TopStart)) { |
| Layout( |
| modifier = Modifier.onPositioned { coordinates: LayoutCoordinates -> |
| wrapSize.value = coordinates.size |
| positionedLatch.countDown() |
| }, |
| children = { |
| Container( |
| Modifier.wrapContentSize(Alignment.Center) |
| .preferredSize(sizeDp) |
| .saveLayoutInfo(childSize, childPosition, positionedLatch) |
| ) { |
| } |
| }, |
| measureBlock = { measurables, incomingConstraints -> |
| val measurable = measurables.first() |
| val constraints = Constraints( |
| minWidth = doubleSizeDp.toIntPx(), |
| minHeight = doubleSizeDp.toIntPx() |
| ).enforce(incomingConstraints) |
| val placeable = measurable.measure(constraints) |
| layout(placeable.width, placeable.height) { |
| placeable.place(Offset.Zero) |
| } |
| } |
| ) |
| } |
| } |
| assertTrue(positionedLatch.await(1, TimeUnit.SECONDS)) |
| |
| assertEquals(IntSize(doubleSize, doubleSize), wrapSize.value) |
| assertEquals(IntSize(size, size), childSize.value) |
| assertEquals( |
| Offset( |
| ((doubleSize - size) / 2f).roundToInt().toFloat(), |
| ((doubleSize - size) / 2f).roundToInt().toFloat() |
| ), |
| childPosition.value |
| ) |
| } |
| |
| // TODO(popam): this should be unit test instead |
| @Test |
| fun testAlignmentCoordinates_evenSize() { |
| val size = IntSize(2, 2) |
| assertEquals(IntOffset(0, 0), Alignment.TopStart.align(size)) |
| assertEquals(IntOffset(1, 0), Alignment.TopCenter.align(size)) |
| assertEquals(IntOffset(2, 0), Alignment.TopEnd.align(size)) |
| assertEquals(IntOffset(0, 1), Alignment.CenterStart.align(size)) |
| assertEquals(IntOffset(1, 1), Alignment.Center.align(size)) |
| assertEquals(IntOffset(2, 1), Alignment.CenterEnd.align(size)) |
| assertEquals(IntOffset(0, 2), Alignment.BottomStart.align(size)) |
| assertEquals(IntOffset(1, 2), Alignment.BottomCenter.align(size)) |
| assertEquals(IntOffset(2, 2), Alignment.BottomEnd.align(size)) |
| } |
| |
| // TODO(popam): this should be unit test instead |
| @Test |
| fun testAlignmentCoordinates_oddSize() { |
| val size = IntSize(3, 3) |
| assertEquals(IntOffset(0, 0), Alignment.TopStart.align(size)) |
| assertEquals(IntOffset(2, 0), Alignment.TopCenter.align(size)) |
| assertEquals(IntOffset(3, 0), Alignment.TopEnd.align(size)) |
| assertEquals(IntOffset(0, 2), Alignment.CenterStart.align(size)) |
| assertEquals(IntOffset(2, 2), Alignment.Center.align(size)) |
| assertEquals(IntOffset(3, 2), Alignment.CenterEnd.align(size)) |
| assertEquals(IntOffset(0, 3), Alignment.BottomStart.align(size)) |
| assertEquals(IntOffset(2, 3), Alignment.BottomCenter.align(size)) |
| assertEquals(IntOffset(3, 3), Alignment.BottomEnd.align(size)) |
| } |
| |
| @Test |
| fun test2DAlignedModifier_hasCorrectIntrinsicMeasurements() = with(density) { |
| testIntrinsics(@Composable { |
| Container(Modifier.wrapContentSize(Alignment.TopStart).aspectRatio(2f)) { } |
| }) { minIntrinsicWidth, minIntrinsicHeight, maxIntrinsicWidth, maxIntrinsicHeight -> |
| // Min width. |
| assertEquals(0, minIntrinsicWidth(0)) |
| assertEquals(25.dp.toIntPx() * 2, minIntrinsicWidth(25.dp.toIntPx())) |
| assertEquals(0.dp.toIntPx(), minIntrinsicWidth(Constraints.Infinity)) |
| |
| // Min height. |
| assertEquals(0, minIntrinsicWidth(0)) |
| assertEquals((50.dp.toIntPx() / 2f).roundToInt(), minIntrinsicHeight(50.dp.toIntPx())) |
| assertEquals(0.dp.toIntPx(), minIntrinsicHeight(Constraints.Infinity)) |
| |
| // Max width. |
| assertEquals(0, minIntrinsicWidth(0)) |
| assertEquals(25.dp.toIntPx() * 2, maxIntrinsicWidth(25.dp.toIntPx())) |
| assertEquals(0.dp.toIntPx(), maxIntrinsicWidth(Constraints.Infinity)) |
| |
| // Max height. |
| assertEquals(0, minIntrinsicWidth(0)) |
| assertEquals((50.dp.toIntPx() / 2f).roundToInt(), maxIntrinsicHeight(50.dp.toIntPx())) |
| assertEquals(0.dp.toIntPx(), maxIntrinsicHeight(Constraints.Infinity)) |
| } |
| } |
| |
| @Test |
| fun test1DAlignedModifier_hasCorrectIntrinsicMeasurements() = with(density) { |
| testIntrinsics({ |
| Container(Modifier.wrapContentHeight(Alignment.CenterVertically) |
| .aspectRatio(2f) |
| ) { } |
| }) { minIntrinsicWidth, minIntrinsicHeight, maxIntrinsicWidth, maxIntrinsicHeight -> |
| |
| // Min width. |
| assertEquals(0, minIntrinsicWidth(0)) |
| assertEquals(25.dp.toIntPx() * 2, minIntrinsicWidth(25.dp.toIntPx())) |
| assertEquals(0.dp.toIntPx(), minIntrinsicWidth(Constraints.Infinity)) |
| |
| // Min height. |
| assertEquals(0, minIntrinsicWidth(0)) |
| assertEquals((50.dp.toIntPx() / 2f).roundToInt(), minIntrinsicHeight(50.dp.toIntPx())) |
| assertEquals(0.dp.toIntPx(), minIntrinsicHeight(Constraints.Infinity)) |
| |
| // Max width. |
| assertEquals(0, minIntrinsicWidth(0)) |
| assertEquals(25.dp.toIntPx() * 2, maxIntrinsicWidth(25.dp.toIntPx())) |
| assertEquals(0.dp.toIntPx(), maxIntrinsicWidth(Constraints.Infinity)) |
| |
| // Max height. |
| assertEquals(0, minIntrinsicWidth(0)) |
| assertEquals((50.dp.toIntPx() / 2f).roundToInt(), maxIntrinsicHeight(50.dp.toIntPx())) |
| assertEquals(0.dp.toIntPx(), maxIntrinsicHeight(Constraints.Infinity)) |
| } |
| } |
| |
| @Test |
| fun testAlignedModifier_alignsCorrectly_whenOddDimensions_endAligned() = with(density) { |
| // Given a 100 x 100 pixel container, we want to make sure that when aligning a 1 x 1 pixel |
| // child to both ends (bottom, and right) we correctly position children at the last |
| // possible pixel, and avoid rounding issues. Previously we first centered the coordinates, |
| // and then aligned after, so the maths would actually be (99 / 2) * 2, which incorrectly |
| // ends up at 100 (Int rounds up) - so the last pixels in both directions just wouldn't |
| // be visible. |
| val parentSize = 100.toDp() |
| val childSizeDp = 1.toDp() |
| val childSizeIpx = childSizeDp.toIntPx() |
| |
| val positionedLatch = CountDownLatch(2) |
| val alignSize = Ref<IntSize>() |
| val alignPosition = Ref<Offset>() |
| val childSize = Ref<IntSize>() |
| val childPosition = Ref<Offset>() |
| show { |
| Layout( |
| children = { |
| Container( |
| Modifier.preferredSize(parentSize) |
| .saveLayoutInfo(alignSize, alignPosition, positionedLatch) |
| ) { |
| Container( |
| Modifier.fillMaxSize() |
| .wrapContentSize(Alignment.BottomEnd) |
| .preferredSize(childSizeDp) |
| .saveLayoutInfo(childSize, childPosition, positionedLatch) |
| ) { |
| } |
| } |
| }, measureBlock = { measurables, constraints -> |
| val placeable = measurables.first().measure(Constraints()) |
| layout(constraints.maxWidth, constraints.maxHeight) { |
| placeable.place(0, 0) |
| } |
| } |
| ) |
| } |
| positionedLatch.await(1, TimeUnit.SECONDS) |
| |
| val root = findOwnerView() |
| waitForDraw(root) |
| |
| assertEquals(IntSize(childSizeIpx, childSizeIpx), childSize.value) |
| assertEquals( |
| Offset( |
| (alignSize.value!!.width - childSizeIpx).toFloat(), |
| (alignSize.value!!.height - childSizeIpx).toFloat() |
| ), |
| childPosition.value |
| ) |
| } |
| } |