| /* |
| * 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.compose.mutableStateOf |
| import androidx.test.filters.SmallTest |
| import androidx.ui.core.Alignment |
| import androidx.ui.core.Layout |
| import androidx.ui.core.LayoutCoordinates |
| import androidx.ui.core.Modifier |
| import androidx.ui.core.Ref |
| import androidx.ui.core.constrainHeight |
| import androidx.ui.core.constrainWidth |
| import androidx.ui.core.onPositioned |
| import androidx.ui.core.positionInRoot |
| import androidx.ui.geometry.Offset |
| import androidx.ui.unit.Dp |
| 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 ContainerTest : LayoutTest() { |
| @Test |
| fun testContainer_wrapsChild() = with(density) { |
| val sizeDp = 50.dp |
| val size = sizeDp.toIntPx() |
| |
| val positionedLatch = CountDownLatch(1) |
| val containerSize = Ref<IntSize>() |
| show { |
| Stack { |
| Container(Modifier.onPositioned { coordinates -> |
| containerSize.value = coordinates.size |
| positionedLatch.countDown() |
| }) { |
| EmptyBox(width = sizeDp, height = sizeDp) |
| } |
| } |
| } |
| assertTrue(positionedLatch.await(1, TimeUnit.SECONDS)) |
| |
| assertEquals(IntSize(size, size), containerSize.value) |
| } |
| |
| @Test |
| fun testContainer_appliesPaddingToChild() = with(density) { |
| val paddingDp = 20.dp |
| val padding = paddingDp.toIntPx() |
| val sizeDp = 50.dp |
| val size = sizeDp.toIntPx() |
| |
| val positionedLatch = CountDownLatch(2) |
| val containerSize = Ref<IntSize>() |
| val childPosition = Ref<Offset>() |
| show { |
| Stack { |
| Container( |
| padding = InnerPadding(paddingDp), |
| modifier = Modifier.onPositioned { coordinates -> |
| containerSize.value = coordinates.size |
| positionedLatch.countDown() |
| } |
| ) { |
| EmptyBox(width = sizeDp, height = sizeDp, |
| modifier = Modifier.onPositioned { coordinates -> |
| childPosition.value = coordinates.positionInRoot |
| positionedLatch.countDown() |
| } |
| ) |
| } |
| } |
| } |
| assertTrue(positionedLatch.await(1, TimeUnit.SECONDS)) |
| |
| val totalPadding = paddingDp.toIntPx() * 2 |
| assertEquals( |
| IntSize(size + totalPadding, size + totalPadding), |
| containerSize.value |
| ) |
| assertEquals(Offset(padding.toFloat(), padding.toFloat()), childPosition.value) |
| } |
| |
| @Test |
| fun testContainer_passesConstraintsToChild() = with(density) { |
| val sizeDp = 100.dp |
| val childWidthDp = 20.dp |
| val childWidth = childWidthDp.toIntPx() |
| val childHeightDp = 30.dp |
| val childHeight = childHeightDp.toIntPx() |
| val childConstraints = DpConstraints.fixed(childWidthDp, childHeightDp) |
| |
| val positionedLatch = CountDownLatch(4) |
| val containerSize = Ref<IntSize>() |
| val childSize = Array(3) { IntSize(0, 0) } |
| show { |
| Stack { |
| Row(Modifier.onPositioned { coordinates -> |
| containerSize.value = coordinates.size |
| positionedLatch.countDown() |
| }) { |
| Container(width = childWidthDp, height = childHeightDp) { |
| EmptyBox(width = sizeDp, height = sizeDp, |
| modifier = Modifier.onPositioned { coordinates -> |
| childSize[0] = coordinates.size |
| positionedLatch.countDown() |
| }) |
| } |
| Container(constraints = childConstraints) { |
| EmptyBox(width = sizeDp, height = sizeDp, |
| modifier = Modifier.onPositioned { coordinates -> |
| childSize[1] = coordinates.size |
| positionedLatch.countDown() |
| }) |
| } |
| Container( |
| constraints = (childConstraints), |
| // These should have priority. |
| width = (childWidthDp * 2), |
| height = (childHeightDp * 2) |
| ) { |
| EmptyBox(width = sizeDp, height = sizeDp, |
| modifier = Modifier.onPositioned { coordinates -> |
| childSize[2] = coordinates.size |
| positionedLatch.countDown() |
| }) |
| } |
| } |
| } |
| } |
| assertTrue(positionedLatch.await(1, TimeUnit.SECONDS)) |
| |
| assertEquals(IntSize(childWidth, childHeight), childSize[0]) |
| assertEquals(IntSize(childWidth, childHeight), childSize[1]) |
| assertEquals( |
| IntSize((childWidthDp * 2).toIntPx(), (childHeightDp * 2).toIntPx()), |
| childSize[2] |
| ) |
| } |
| |
| @Test |
| fun testContainer_fillsAvailableSpace_whenSizeIsMax() = with(density) { |
| val sizeDp = 50.dp |
| val size = sizeDp.toIntPx() |
| |
| val positionedLatch = CountDownLatch(3) |
| val alignSize = Ref<IntSize>() |
| val containerSize = Ref<IntSize>() |
| val childSize = Ref<IntSize>() |
| val childPosition = Ref<Offset>() |
| show { |
| Container( |
| alignment = Alignment.TopStart, |
| modifier = Modifier.onPositioned { coordinates: LayoutCoordinates -> |
| alignSize.value = coordinates.size |
| positionedLatch.countDown() |
| } |
| ) { |
| Container( |
| expanded = true, |
| modifier = Modifier.onPositioned { coordinates: LayoutCoordinates -> |
| containerSize.value = coordinates.size |
| positionedLatch.countDown() |
| } |
| ) { |
| EmptyBox( |
| width = sizeDp, |
| height = sizeDp, |
| modifier = Modifier.onPositioned { coordinates: LayoutCoordinates -> |
| childSize.value = coordinates.size |
| childPosition.value = coordinates.positionInRoot |
| positionedLatch.countDown() |
| }) |
| } |
| } |
| } |
| assertTrue(positionedLatch.await(1, TimeUnit.SECONDS)) |
| |
| assertEquals(alignSize.value, containerSize.value) |
| assertEquals(IntSize(size, size), childSize.value) |
| assertEquals( |
| Offset( |
| (containerSize.value!!.width.toFloat() / 2 - size.toFloat() / 2) |
| .roundToInt().toFloat(), |
| (containerSize.value!!.height.toFloat() / 2 - size.toFloat() / 2) |
| .roundToInt().toFloat() |
| ), |
| childPosition.value |
| ) |
| } |
| |
| @Test |
| fun testContainer_respectsIncomingMinConstraints() = with(density) { |
| // Start with an even number of Int to avoid rounding issues due to different DPI |
| // I.e, if we fix Dp instead, it's possible that when we convert to Px, sizeDp can round |
| // down but sizeDp * 2 can round up, causing a 1 pixel test error. |
| val size = 200 |
| val sizeDp = size.toDp() |
| |
| val positionedLatch = CountDownLatch(2) |
| val containerSize = Ref<IntSize>() |
| val childSize = Ref<IntSize>() |
| val childPosition = Ref<Offset>() |
| show { |
| Stack { |
| val constraints = DpConstraints(minWidth = sizeDp * 2, minHeight = sizeDp * 2) |
| ConstrainedBox( |
| modifier = Modifier.onPositioned { coordinates: LayoutCoordinates -> |
| containerSize.value = coordinates.size |
| positionedLatch.countDown() |
| }, |
| constraints = constraints |
| ) { |
| Container(alignment = Alignment.BottomEnd) { |
| EmptyBox(width = sizeDp, height = sizeDp, |
| modifier = Modifier.onPositioned { coordinates: LayoutCoordinates -> |
| childSize.value = coordinates.size |
| childPosition.value = |
| coordinates.positionInRoot |
| positionedLatch.countDown() |
| }) |
| } |
| } |
| } |
| } |
| assertTrue(positionedLatch.await(1, TimeUnit.SECONDS)) |
| |
| assertEquals( |
| IntSize((sizeDp * 2).toIntPx(), (sizeDp * 2).toIntPx()), |
| containerSize.value |
| ) |
| assertEquals(IntSize(size, size), childSize.value) |
| assertEquals(Offset(size.toFloat(), size.toFloat()), childPosition.value) |
| } |
| |
| @Test |
| fun testContainer_hasTheRightSize_withPaddingAndNoChildren() = with(density) { |
| val sizeDp = 50.dp |
| val size = sizeDp.toIntPx() |
| |
| val containerSize = Ref<IntSize>() |
| val latch = CountDownLatch(1) |
| show { |
| Stack { |
| Container(width = sizeDp, height = sizeDp, padding = InnerPadding(10.dp), |
| modifier = Modifier.onPositioned { coordinates: LayoutCoordinates -> |
| containerSize.value = coordinates.size |
| latch.countDown() |
| }) { |
| } |
| } |
| } |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| |
| assertEquals(IntSize(size, size), containerSize.value) |
| } |
| |
| @Test |
| fun testContainer_correctlyAppliesNonSymmetricPadding() = with(density) { |
| val childSizeDp = 50.toDp() |
| val paddingLeft = 8.toDp() |
| val paddingTop = 7.toDp() |
| val paddingRight = 5.toDp() |
| val paddingBottom = 10.toDp() |
| val innerPadding = InnerPadding( |
| start = paddingLeft, |
| top = paddingTop, |
| end = paddingRight, |
| bottom = paddingBottom |
| ) |
| val expectedSize = IntSize( |
| childSizeDp.toIntPx() + paddingLeft.toIntPx() + paddingRight.toIntPx(), |
| childSizeDp.toIntPx() + paddingTop.toIntPx() + paddingBottom.toIntPx() |
| ) |
| |
| var containerSize: IntSize? = null |
| val latch = CountDownLatch(1) |
| show { |
| Stack { |
| Container( |
| Modifier.onPositioned { coordinates: LayoutCoordinates -> |
| containerSize = coordinates.size |
| latch.countDown() |
| }, |
| padding = innerPadding |
| ) { |
| Spacer(Modifier.preferredSize(width = childSizeDp, height = childSizeDp)) |
| } |
| } |
| } |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| |
| assertEquals(expectedSize, containerSize) |
| } |
| |
| @Test |
| fun testContainer_contentSmallerThanPaddingIsCentered() = with(density) { |
| val containerSize = 50.toDp() |
| val padding = 10.toDp() |
| val childSize = 5.toDp() |
| val innerPadding = InnerPadding(padding) |
| |
| var childCoordinates: LayoutCoordinates? = null |
| val latch = CountDownLatch(1) |
| show { |
| Stack { |
| Container(width = containerSize, height = containerSize, padding = innerPadding) { |
| Spacer( |
| Modifier.preferredSize(width = childSize, height = childSize) + |
| Modifier.onPositioned { coordinates: LayoutCoordinates -> |
| childCoordinates = coordinates |
| latch.countDown() |
| }) |
| } |
| } |
| } |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| |
| val centeringOffset = padding.toIntPx() + |
| ((containerSize.toIntPx() - padding.toIntPx() * 2 - |
| childSize.toIntPx()) / 2f).roundToInt() |
| val childPosition = childCoordinates!!.parentCoordinates!!.childToLocal( |
| childCoordinates!!, |
| Offset.Zero |
| ) |
| assertEquals( |
| Offset(centeringOffset.toFloat(), centeringOffset.toFloat()), |
| childPosition |
| ) |
| assertEquals(IntSize(childSize.toIntPx(), childSize.toIntPx()), childCoordinates!!.size) |
| } |
| |
| @Test |
| fun testContainer_childAffectsContainerSize() { |
| var layoutLatch = CountDownLatch(2) |
| val size = mutableStateOf(10.dp) |
| var measure = 0 |
| var layout = 0 |
| show { |
| Stack { |
| Layout(children = { |
| Container { |
| EmptyBox( |
| width = size.value, |
| height = 10.dp, |
| modifier = Modifier.onPositioned { layoutLatch.countDown() } |
| ) |
| } |
| }) { measurables, constraints -> |
| val placeable = measurables.first().measure(constraints) |
| ++measure |
| layout(placeable.width, placeable.height) { |
| placeable.place(0, 0) |
| ++layout |
| layoutLatch.countDown() |
| } |
| } |
| } |
| } |
| assertTrue(layoutLatch.await(1, TimeUnit.SECONDS)) |
| assertEquals(1, measure) |
| assertEquals(1, layout) |
| |
| layoutLatch = CountDownLatch(2) |
| activityTestRule.runOnUiThread { size.value = 20.dp } |
| assertTrue(layoutLatch.await(1, TimeUnit.SECONDS)) |
| assertEquals(2, measure) |
| assertEquals(2, layout) |
| } |
| |
| @Test |
| fun testContainer_childDoesNotAffectContainerSize_whenSizeIsMax() { |
| var layoutLatch = CountDownLatch(2) |
| val size = mutableStateOf(10.dp) |
| var measure = 0 |
| var layout = 0 |
| show { |
| Stack { |
| Layout(children = { |
| Container(expanded = true) { |
| EmptyBox( |
| width = size.value, |
| height = 10.dp, |
| modifier = Modifier.onPositioned { layoutLatch.countDown() } |
| ) |
| } |
| }) { measurables, constraints -> |
| val placeable = measurables.first().measure(constraints) |
| ++measure |
| layout(placeable.width, placeable.height) { |
| placeable.place(0, 0) |
| ++layout |
| layoutLatch.countDown() |
| } |
| } |
| } |
| } |
| assertTrue(layoutLatch.await(1, TimeUnit.SECONDS)) |
| assertEquals(1, measure) |
| assertEquals(1, layout) |
| |
| layoutLatch = CountDownLatch(1) |
| activityTestRule.runOnUiThread { size.value = 20.dp } |
| assertTrue(layoutLatch.await(1, TimeUnit.SECONDS)) |
| assertEquals(1, measure) |
| assertEquals(1, layout) |
| } |
| |
| @Test |
| fun testContainer_childDoesNotAffectContainerSize_whenFixedWidthAndHeight() { |
| var layoutLatch = CountDownLatch(2) |
| val size = mutableStateOf(10.dp) |
| var measure = 0 |
| var layout = 0 |
| show { |
| Stack { |
| Layout(children = { |
| Container(width = 20.dp, height = 20.dp) { |
| EmptyBox( |
| width = size.value, |
| height = 10.dp, |
| modifier = Modifier.onPositioned { layoutLatch.countDown() } |
| ) |
| } |
| }) { measurables, constraints -> |
| val placeable = measurables.first().measure(constraints) |
| ++measure |
| layout(placeable.width, placeable.height) { |
| placeable.place(0, 0) |
| ++layout |
| layoutLatch.countDown() |
| } |
| } |
| } |
| } |
| assertTrue(layoutLatch.await(1, TimeUnit.SECONDS)) |
| assertEquals(1, measure) |
| assertEquals(1, layout) |
| |
| layoutLatch = CountDownLatch(1) |
| activityTestRule.runOnUiThread { size.value = 20.dp } |
| assertTrue(layoutLatch.await(1, TimeUnit.SECONDS)) |
| assertEquals(1, measure) |
| assertEquals(1, layout) |
| } |
| |
| @Composable |
| fun EmptyBox(width: Dp, height: Dp, modifier: Modifier = Modifier) { |
| Layout(modifier = modifier, children = { }) { _, constraints -> |
| layout( |
| constraints.constrainWidth(width.toIntPx()), |
| constraints.constrainHeight(height.toIntPx()) |
| ) {} |
| } |
| } |
| } |