| /* |
| * 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. |
| */ |
| |
| @file:Suppress("Deprecation") |
| |
| package androidx.ui.core.test |
| |
| import android.graphics.Bitmap |
| import android.os.Build |
| import androidx.compose.Composable |
| import androidx.compose.State |
| import androidx.compose.emptyContent |
| import androidx.compose.getValue |
| import androidx.compose.mutableStateOf |
| import androidx.compose.onDispose |
| import androidx.compose.remember |
| import androidx.compose.setValue |
| import androidx.compose.state |
| import androidx.test.filters.SdkSuppress |
| import androidx.test.filters.SmallTest |
| import androidx.compose.ui.unit.Constraints |
| import androidx.ui.core.DensityAmbient |
| import androidx.ui.core.Layout |
| import androidx.compose.ui.unit.LayoutDirection |
| import androidx.ui.core.LayoutModifier |
| import androidx.ui.core.Measurable |
| import androidx.ui.core.MeasureBlock2 |
| import androidx.ui.core.MeasureScope |
| import androidx.ui.core.Modifier |
| import androidx.ui.core.Ref |
| import androidx.ui.core.WithConstraints |
| import androidx.ui.core.drawBehind |
| import androidx.ui.core.onPositioned |
| import androidx.ui.core.paint |
| import androidx.ui.core.setContent |
| import androidx.ui.framework.test.TestActivity |
| import androidx.compose.ui.geometry.Offset |
| import androidx.compose.ui.graphics.Color |
| import androidx.compose.ui.graphics.vector.VectorPainter |
| import androidx.compose.foundation.layout.Constraints |
| import androidx.compose.foundation.layout.DpConstraints |
| import androidx.compose.foundation.layout.ltr |
| import androidx.compose.foundation.layout.rtl |
| import androidx.compose.ui.unit.Density |
| import androidx.compose.ui.unit.Dp |
| import androidx.compose.ui.unit.IntSize |
| import androidx.compose.ui.unit.dp |
| import org.junit.Assert.assertEquals |
| import org.junit.Assert.assertTrue |
| import org.junit.Before |
| import org.junit.Rule |
| import org.junit.Test |
| import org.junit.runner.RunWith |
| import org.junit.runners.JUnit4 |
| import java.util.concurrent.CountDownLatch |
| import java.util.concurrent.TimeUnit |
| |
| @SmallTest |
| @RunWith(JUnit4::class) |
| class WithConstraintsTest { |
| |
| @Suppress("DEPRECATION") |
| @get:Rule |
| val rule = androidx.test.rule.ActivityTestRule<TestActivity>( |
| TestActivity::class.java |
| ) |
| @get:Rule |
| val excessiveAssertions = AndroidOwnerExtraAssertionsRule() |
| |
| private lateinit var activity: TestActivity |
| private lateinit var drawLatch: CountDownLatch |
| |
| @Before |
| fun setup() { |
| activity = rule.activity |
| activity.hasFocusLatch.await(5, TimeUnit.SECONDS) |
| drawLatch = CountDownLatch(1) |
| } |
| |
| @Test |
| fun withConstraintsTest() { |
| val size = 20 |
| |
| val countDownLatch = CountDownLatch(1) |
| val topConstraints = Ref<Constraints>() |
| val paddedConstraints = Ref<Constraints>() |
| val firstChildConstraints = Ref<Constraints>() |
| val secondChildConstraints = Ref<Constraints>() |
| rule.runOnUiThreadIR { |
| activity.setContent { |
| WithConstraints { |
| topConstraints.value = constraints |
| Padding(size = size) { |
| val drawModifier = Modifier.drawBehind { |
| countDownLatch.countDown() |
| } |
| WithConstraints(drawModifier) { |
| paddedConstraints.value = constraints |
| Layout(measureBlock = { _, childConstraints -> |
| firstChildConstraints.value = childConstraints |
| layout(size, size) { } |
| }, children = { }) |
| Layout(measureBlock = { _, chilConstraints -> |
| secondChildConstraints.value = chilConstraints |
| layout(size, size) { } |
| }, children = { }) |
| } |
| } |
| } |
| } |
| } |
| assertTrue(countDownLatch.await(1, TimeUnit.SECONDS)) |
| |
| val expectedPaddedConstraints = Constraints( |
| 0, |
| topConstraints.value!!.maxWidth - size * 2, |
| 0, |
| topConstraints.value!!.maxHeight - size * 2 |
| ) |
| assertEquals(expectedPaddedConstraints, paddedConstraints.value) |
| assertEquals(paddedConstraints.value, firstChildConstraints.value) |
| assertEquals(paddedConstraints.value, secondChildConstraints.value) |
| } |
| |
| @Suppress("UNUSED_ANONYMOUS_PARAMETER") |
| @SdkSuppress(minSdkVersion = Build.VERSION_CODES.O) |
| @Test |
| fun withConstraints_layoutListener() { |
| val green = Color.Green |
| val white = Color.White |
| val model = SquareModel(size = 20, outerColor = green, innerColor = white) |
| |
| rule.runOnUiThreadIR { |
| activity.setContent { |
| WithConstraints { |
| val outerModifier = Modifier.drawBehind { |
| drawRect(model.outerColor) |
| } |
| Layout(children = { |
| val innerModifier = Modifier.drawBehind { |
| drawLatch.countDown() |
| drawRect(model.innerColor) |
| } |
| Layout( |
| children = {}, |
| modifier = innerModifier |
| ) { measurables, constraints2 -> |
| layout(model.size, model.size) {} |
| } |
| }, modifier = outerModifier) { measurables, constraints3 -> |
| val placeable = measurables[0].measure( |
| Constraints.fixed( |
| model.size, |
| model.size |
| ) |
| ) |
| layout(model.size * 3, model.size * 3) { |
| placeable.place(model.size, model.size) |
| } |
| } |
| } |
| } |
| } |
| takeScreenShot(60).apply { |
| assertRect(color = white, size = 20) |
| assertRect(color = green, holeSize = 20) |
| } |
| |
| drawLatch = CountDownLatch(1) |
| rule.runOnUiThreadIR { |
| model.size = 10 |
| } |
| |
| takeScreenShot(30).apply { |
| assertRect(color = white, size = 10) |
| assertRect(color = green, holeSize = 10) |
| } |
| } |
| |
| /** |
| * WithConstraints will cause a requestLayout during layout in some circumstances. |
| * The test here is the minimal example from a bug. |
| */ |
| @SdkSuppress(minSdkVersion = Build.VERSION_CODES.O) |
| @Test |
| fun requestLayoutDuringLayout() { |
| val offset = mutableStateOf(0) |
| rule.runOnUiThreadIR { |
| activity.setContent { |
| Scroller( |
| modifier = countdownLatchBackgroundModifier(Color.Yellow), |
| onScrollPositionChanged = { position, _ -> |
| offset.value = position |
| }, |
| offset = offset |
| ) { |
| // Need to pass some param here to a separate function or else it works fine |
| TestLayout(5) |
| } |
| } |
| } |
| |
| takeScreenShot(30).apply { |
| assertRect(color = Color.Red, size = 10) |
| assertRect(color = Color.Yellow, holeSize = 10) |
| } |
| } |
| |
| @Test |
| fun subcomposionInsideWithConstraintsDoesntAffectModelReadsObserving() { |
| val model = mutableStateOf(0) |
| var latch = CountDownLatch(1) |
| |
| rule.runOnUiThreadIR { |
| activity.setContent { |
| WithConstraints { |
| // this block is called as a subcomposition from LayoutNode.measure() |
| // VectorPainter introduces additional subcomposition which is closing the |
| // current frame and opens a new one. our model reads during measure() |
| // wasn't possible to survide Frames swicth previously so the model read |
| // within the child Layout wasn't recorded |
| val background = Modifier.paint( |
| VectorPainter( |
| name = "testPainter", |
| defaultWidth = 10.dp, |
| defaultHeight = 10.dp |
| ) { _, _ -> |
| /* intentionally empty */ |
| } |
| ) |
| Layout(modifier = background, children = {}) { _, _ -> |
| // read the model |
| model.value |
| latch.countDown() |
| layout(10, 10) {} |
| } |
| } |
| } |
| } |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| |
| latch = CountDownLatch(1) |
| rule.runOnUiThread { model.value++ } |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| } |
| |
| @Test |
| fun withConstraintCallbackIsNotExecutedWithInnerRecompositions() { |
| val model = mutableStateOf(0) |
| var latch = CountDownLatch(1) |
| var recompositionsCount1 = 0 |
| var recompositionsCount2 = 0 |
| |
| rule.runOnUiThreadIR { |
| activity.setContent { |
| WithConstraints { |
| recompositionsCount1++ |
| Container(100, 100) { |
| model.value // model read |
| recompositionsCount2++ |
| latch.countDown() |
| } |
| } |
| } |
| } |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| |
| latch = CountDownLatch(1) |
| rule.runOnUiThread { model.value++ } |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| assertEquals(1, recompositionsCount1) |
| assertEquals(2, recompositionsCount2) |
| } |
| |
| @Test |
| fun updateConstraintsRecomposingWithConstraints() { |
| val model = mutableStateOf(50) |
| var latch = CountDownLatch(1) |
| var actualConstraints: Constraints? = null |
| |
| rule.runOnUiThreadIR { |
| activity.setContent { |
| ChangingConstraintsLayout(model) { |
| WithConstraints { |
| actualConstraints = constraints |
| assertEquals(1, latch.count) |
| latch.countDown() |
| Container(width = 100, height = 100, children = emptyContent()) |
| } |
| } |
| } |
| } |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| assertEquals(Constraints.fixed(50, 50), actualConstraints) |
| |
| latch = CountDownLatch(1) |
| rule.runOnUiThread { model.value = 100 } |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| assertEquals(Constraints.fixed(100, 100), actualConstraints) |
| } |
| |
| @Test |
| fun updateLayoutDirectionRecomposingWithConstraints() { |
| val direction = mutableStateOf(LayoutDirection.Rtl) |
| var latch = CountDownLatch(1) |
| var actualDirection: LayoutDirection? = null |
| |
| rule.runOnUiThreadIR { |
| activity.setContent { |
| ChangingLayoutDirectionLayout(direction) { |
| WithConstraints { |
| actualDirection = layoutDirection |
| assertEquals(1, latch.count) |
| latch.countDown() |
| Container(width = 100, height = 100, children = emptyContent()) |
| } |
| } |
| } |
| } |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| assertEquals(LayoutDirection.Rtl, actualDirection) |
| |
| latch = CountDownLatch(1) |
| rule.runOnUiThread { direction.value = LayoutDirection.Ltr } |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| assertEquals(LayoutDirection.Ltr, actualDirection) |
| } |
| |
| @Test |
| fun withConstsraintsBehavesAsWrap() { |
| val size = mutableStateOf(50) |
| var withConstLatch = CountDownLatch(1) |
| var childLatch = CountDownLatch(1) |
| var withConstSize: IntSize? = null |
| var childSize: IntSize? = null |
| |
| rule.runOnUiThreadIR { |
| activity.setContent { |
| Container(width = 200, height = 200) { |
| WithConstraints(modifier = Modifier.onPositioned { |
| // OnPositioned can be fired multiple times with the same value |
| // for example when requestLayout() was triggered on ComposeView. |
| // if we called twice, let's make sure we got the correct values. |
| assertTrue(withConstSize == null || withConstSize == it.size) |
| withConstSize = it.size |
| withConstLatch.countDown() |
| }) { |
| Container(width = size.value, height = size.value, |
| modifier = Modifier.onPositioned { |
| // OnPositioned can be fired multiple times with the same value |
| // for example when requestLayout() was triggered on ComposeView. |
| // if we called twice, let's make sure we got the correct values. |
| assertTrue(childSize == null || childSize == it.size) |
| childSize = it.size |
| childLatch.countDown() |
| }) { |
| } |
| } |
| } |
| } |
| } |
| assertTrue(withConstLatch.await(1, TimeUnit.SECONDS)) |
| assertTrue(childLatch.await(1, TimeUnit.SECONDS)) |
| var expectedSize = IntSize(50, 50) |
| assertEquals(expectedSize, withConstSize) |
| assertEquals(expectedSize, childSize) |
| |
| withConstSize = null |
| childSize = null |
| withConstLatch = CountDownLatch(1) |
| childLatch = CountDownLatch(1) |
| rule.runOnUiThread { size.value = 100 } |
| |
| assertTrue(withConstLatch.await(1, TimeUnit.SECONDS)) |
| assertTrue(childLatch.await(1, TimeUnit.SECONDS)) |
| expectedSize = IntSize(100, 100) |
| assertEquals(expectedSize, withConstSize) |
| assertEquals(expectedSize, childSize) |
| } |
| |
| @SdkSuppress(minSdkVersion = Build.VERSION_CODES.O) |
| @Test |
| fun withConstraintsIsNotSwallowingInnerRemeasureRequest() { |
| val model = mutableStateOf(100) |
| |
| rule.runOnUiThreadIR { |
| activity.setContent { |
| Container(100, 100, backgroundModifier(Color.Red)) { |
| ChangingConstraintsLayout(model) { |
| WithConstraints { |
| val receivedConstraints = constraints |
| Container(100, 100, infiniteConstraints) { |
| Container(100, 100) { |
| Layout( |
| {}, |
| countdownLatchBackgroundModifier(Color.Yellow) |
| ) { _, _ -> |
| // the same as the value inside ValueModel |
| val size = receivedConstraints.maxWidth |
| layout(size, size) {} |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| takeScreenShot(100).apply { |
| assertRect(color = Color.Yellow) |
| } |
| |
| drawLatch = CountDownLatch(1) |
| rule.runOnUiThread { |
| model.value = 50 |
| } |
| takeScreenShot(100).apply { |
| assertRect(color = Color.Red, holeSize = 50) |
| assertRect(color = Color.Yellow, size = 50) |
| } |
| } |
| |
| @Test |
| fun updateModelInMeasuringAndReadItInCompositionWorksInsideWithConstraints() { |
| val latch = CountDownLatch(1) |
| rule.runOnUiThread { |
| activity.setContent { |
| Container(width = 100, height = 100) { |
| WithConstraints { |
| // this replicates the popular pattern we currently use |
| // where we save some data calculated in the measuring block |
| // and then use it in the next composition frame |
| var model by state { false } |
| Layout({ |
| if (model) { |
| latch.countDown() |
| } |
| }) { _, _ -> |
| if (!model) { |
| model = true |
| } |
| layout(100, 100) {} |
| } |
| } |
| } |
| } |
| } |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| } |
| |
| @SdkSuppress(minSdkVersion = Build.VERSION_CODES.O) |
| @Test |
| fun removeLayoutNodeFromWithConstraintsDuringOnMeasure() { |
| val model = mutableStateOf(100) |
| drawLatch = CountDownLatch(2) |
| |
| rule.runOnUiThreadIR { |
| activity.setContent { |
| Container( |
| 100, 100, |
| modifier = countdownLatchBackgroundModifier(Color.Red) |
| ) { |
| // this component changes the constraints which triggers subcomposition |
| // within onMeasure block |
| ChangingConstraintsLayout(model) { |
| WithConstraints { |
| if (constraints.maxWidth == 100) { |
| // we will stop emmitting this layouts after constraints change |
| // Additional Container is needed so the Layout will be |
| // marked as not affecting parent size which means the Layout |
| // will be added into relayoutNodes List separately |
| Container(100, 100) { |
| Layout( |
| children = {}, |
| modifier = countdownLatchBackgroundModifier(Color.Yellow) |
| ) { _, _ -> |
| layout(model.value, model.value) {} |
| } |
| } |
| } |
| } |
| Container(100, 100, Modifier, emptyContent()) |
| } |
| } |
| } |
| } |
| takeScreenShot(100).apply { |
| assertRect(color = Color.Yellow) |
| } |
| |
| drawLatch = CountDownLatch(1) |
| rule.runOnUiThread { |
| model.value = 50 |
| } |
| |
| takeScreenShot(100).apply { |
| assertRect(color = Color.Red) |
| } |
| } |
| |
| @Test |
| fun withConstraintsSiblingWhichIsChangingTheModelInsideMeasureBlock() { |
| // WithConstraints is calling FrameManager.nextFrame() after composition |
| // so this code was causing an issue as the model value change is triggering |
| // remeasuring while our parent is measuring right now and this child was |
| // already measured |
| val drawlatch = CountDownLatch(1) |
| rule.runOnUiThread { |
| activity.setContent { |
| val state = state { false } |
| var lastLayoutValue: Boolean = false |
| val drawModifier = Modifier.drawBehind { |
| // this verifies the layout was remeasured before being drawn |
| assertTrue(lastLayoutValue) |
| drawlatch.countDown() |
| } |
| Layout(children = {}, modifier = drawModifier) { _, _ -> |
| lastLayoutValue = state.value |
| // this registers the value read |
| if (!state.value) { |
| // change the value right inside the measure block |
| // it will cause one more remeasure pass as we also read this value |
| state.value = true |
| } |
| layout(100, 100) {} |
| } |
| WithConstraints {} |
| } |
| } |
| assertTrue(drawlatch.await(1, TimeUnit.SECONDS)) |
| } |
| |
| @Test |
| fun allTheStepsCalledExactlyOnce() { |
| val outerComposeLatch = CountDownLatch(1) |
| val outerMeasureLatch = CountDownLatch(1) |
| val outerLayoutLatch = CountDownLatch(1) |
| val innerComposeLatch = CountDownLatch(1) |
| val innerMeasureLatch = CountDownLatch(1) |
| val innerLayoutLatch = CountDownLatch(1) |
| rule.runOnUiThread { |
| activity.setContent { |
| assertEquals(1, outerComposeLatch.count) |
| outerComposeLatch.countDown() |
| val children = @Composable { |
| Layout(children = { |
| WithConstraints { |
| assertEquals(1, innerComposeLatch.count) |
| innerComposeLatch.countDown() |
| Layout(children = emptyContent()) { _, _ -> |
| assertEquals(1, innerMeasureLatch.count) |
| innerMeasureLatch.countDown() |
| layout(100, 100) { |
| assertEquals(1, innerLayoutLatch.count) |
| innerLayoutLatch.countDown() |
| } |
| } |
| } |
| }) { measurables, constraints -> |
| assertEquals(1, outerMeasureLatch.count) |
| outerMeasureLatch.countDown() |
| layout(100, 100) { |
| assertEquals(1, outerLayoutLatch.count) |
| outerLayoutLatch.countDown() |
| measurables.forEach { it.measure(constraints).place(0, 0) } |
| } |
| } |
| } |
| |
| Layout(children) { measurables, _ -> |
| layout(100, 100) { |
| // we fix the constraints used by children so if the constraints given |
| // by the android view will change it would not affect the test |
| val constraints = Constraints(maxWidth = 100, maxHeight = 100) |
| measurables.first().measure(constraints).place(0, 0) |
| } |
| } |
| } |
| } |
| assertTrue(outerComposeLatch.await(1, TimeUnit.SECONDS)) |
| assertTrue(outerMeasureLatch.await(1, TimeUnit.SECONDS)) |
| assertTrue(outerLayoutLatch.await(1, TimeUnit.SECONDS)) |
| assertTrue(innerComposeLatch.await(1, TimeUnit.SECONDS)) |
| assertTrue(innerMeasureLatch.await(1, TimeUnit.SECONDS)) |
| assertTrue(innerLayoutLatch.await(1, TimeUnit.SECONDS)) |
| } |
| |
| @Test |
| fun triggerRootRemeasureWhileRootIsLayouting() { |
| rule.runOnUiThread { |
| activity.setContent { |
| val state = state { 0 } |
| ContainerChildrenAffectsParentSize(100, 100) { |
| WithConstraints { |
| Layout( |
| children = {}, |
| modifier = countdownLatchBackgroundModifier(Color.Transparent) |
| ) { _, _ -> |
| // read and write once inside measureBlock |
| if (state.value == 0) { |
| state.value = 1 |
| } |
| layout(100, 100) {} |
| } |
| } |
| Container(100, 100) { |
| WithConstraints {} |
| } |
| } |
| } |
| } |
| |
| assertTrue(drawLatch.await(1, TimeUnit.SECONDS)) |
| // before the fix this was failing our internal assertions in AndroidOwner |
| // so nothing else to assert, apart from not crashing |
| } |
| |
| @Test |
| fun withConstraints_getsCorrectLayoutDirection() { |
| var latch = CountDownLatch(1) |
| var resultLayoutDirection: LayoutDirection? = null |
| rule.runOnUiThreadIR { |
| activity.setContent { |
| Layout( |
| children = @Composable { |
| WithConstraints { |
| resultLayoutDirection = layoutDirection |
| } |
| }, |
| modifier = layoutDirectionModifier(LayoutDirection.Rtl) |
| ) { m, c -> |
| val p = m.first().measure(c) |
| layout(0, 0) { |
| p.place(Offset.Zero) |
| latch.countDown() |
| } |
| } |
| } |
| } |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| assertEquals(LayoutDirection.Rtl, resultLayoutDirection) |
| } |
| |
| @Test |
| fun withConstraints_layoutDirectionSetByModifier() { |
| var latch = CountDownLatch(1) |
| var resultLayoutDirection: LayoutDirection? = null |
| rule.runOnUiThreadIR { |
| activity.setContent { |
| Layout( |
| children = @Composable { |
| WithConstraints( |
| modifier = layoutDirectionModifier(LayoutDirection.Rtl) |
| ) { |
| resultLayoutDirection = layoutDirection |
| latch.countDown() |
| } |
| }, |
| modifier = layoutDirectionModifier(LayoutDirection.Ltr) |
| ) { m, c -> |
| val p = m.first().measure(c) |
| layout(0, 0) { |
| p.place(Offset.Zero) |
| latch.countDown() |
| } |
| } |
| } |
| } |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| assertEquals(LayoutDirection.Rtl, resultLayoutDirection) |
| } |
| |
| @Test |
| fun withConstraintsChildIsMeasuredEvenWithDefaultConstraints() { |
| val compositionLatch = CountDownLatch(1) |
| val childMeasureLatch = CountDownLatch(1) |
| val zeroConstraints = Constraints.fixed(0, 0) |
| rule.runOnUiThreadIR { |
| activity.setContent { |
| Layout(measureBlock = { measurables, _ -> |
| layout(0, 0) { |
| // there was a bug when the child of WithConstraints wasn't marking |
| // needsRemeasure and it was only measured because the constraints |
| // have been changed. to verify needRemeasure is true we measure the |
| // children with the default zero constraints so it will be equals to the |
| // initial constraints |
| measurables.first().measure(zeroConstraints).place(0, 0) |
| } |
| }, children = { |
| WithConstraints { |
| compositionLatch.countDown() |
| Layout(children = {}) { _, _ -> |
| childMeasureLatch.countDown() |
| layout(0, 0) {} |
| } |
| } |
| }) |
| } |
| } |
| |
| assertTrue(compositionLatch.await(1, TimeUnit.SECONDS)) |
| assertTrue(childMeasureLatch.await(1, TimeUnit.SECONDS)) |
| } |
| |
| @Test |
| fun onDisposeInsideWithConstraintsCalled() { |
| var emit by mutableStateOf(true) |
| val composedLatch = CountDownLatch(1) |
| val disposedLatch = CountDownLatch(1) |
| rule.runOnUiThreadIR { |
| activity.setContent { |
| if (emit) { |
| WithConstraints { |
| composedLatch.countDown() |
| onDispose { |
| disposedLatch.countDown() |
| } |
| } |
| } |
| } |
| } |
| |
| assertTrue(composedLatch.await(1, TimeUnit.SECONDS)) |
| |
| rule.runOnUiThread { |
| emit = false |
| } |
| assertTrue(disposedLatch.await(1, TimeUnit.SECONDS)) |
| } |
| |
| @Test |
| fun dpOverloadsHaveCorrectValues() { |
| val dpConstraints = DpConstraints( |
| minWidth = 5.dp, |
| maxWidth = 7.dp, |
| minHeight = 9.dp, |
| maxHeight = 12.dp |
| ) |
| val latch = CountDownLatch(1) |
| var actualMinWidth: Dp = 0.dp |
| var actualMaxWidth: Dp = 0.dp |
| var actualMinHeight: Dp = 0.dp |
| var actualMaxHeight: Dp = 0.dp |
| var density: Density? = null |
| rule.runOnUiThreadIR { |
| activity.setContent { |
| Layout( |
| children = @Composable { |
| WithConstraints { |
| density = DensityAmbient.current |
| actualMinWidth = minWidth |
| actualMaxWidth = maxWidth |
| actualMinHeight = minHeight |
| actualMaxHeight = maxHeight |
| latch.countDown() |
| } |
| } |
| ) { m, _ -> |
| layout(0, 0) { |
| m.first().measure(Constraints(dpConstraints)).place(Offset.Zero) |
| } |
| } |
| } |
| } |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| with(density!!) { |
| assertEquals(dpConstraints.minWidth.toIntPx(), actualMinWidth.toIntPx()) |
| assertEquals(dpConstraints.maxWidth.toIntPx(), actualMaxWidth.toIntPx()) |
| assertEquals(dpConstraints.minHeight.toIntPx(), actualMinHeight.toIntPx()) |
| assertEquals(dpConstraints.maxHeight.toIntPx(), actualMaxHeight.toIntPx()) |
| } |
| } |
| |
| private fun takeScreenShot(size: Int): Bitmap { |
| assertTrue(drawLatch.await(1, TimeUnit.SECONDS)) |
| val bitmap = rule.waitAndScreenShot() |
| assertEquals(size, bitmap.width) |
| assertEquals(size, bitmap.height) |
| return bitmap |
| } |
| |
| private fun countdownLatchBackgroundModifier(color: Color) = |
| Modifier.drawBehind { |
| drawRect(color) |
| drawLatch.countDown() |
| } |
| |
| private fun layoutDirectionModifier(ld: LayoutDirection) = when (ld) { |
| LayoutDirection.Ltr -> Modifier.ltr |
| LayoutDirection.Rtl -> Modifier.rtl |
| } |
| } |
| |
| @Composable |
| private fun TestLayout(@Suppress("UNUSED_PARAMETER") someInput: Int) { |
| Layout(children = { |
| WithConstraints { |
| NeedsOtherMeasurementComposable(10) |
| } |
| }) { measurables, constraints -> |
| val withConstraintsPlaceable = measurables[0].measure(constraints) |
| |
| layout(30, 30) { |
| withConstraintsPlaceable.place(10, 10) |
| } |
| } |
| } |
| |
| @Composable |
| private fun NeedsOtherMeasurementComposable(foo: Int) { |
| Layout( |
| children = {}, |
| modifier = backgroundModifier(Color.Red) |
| ) { _, _ -> |
| layout(foo, foo) { } |
| } |
| } |
| |
| @Composable |
| fun Container( |
| width: Int, |
| height: Int, |
| modifier: Modifier = Modifier, |
| children: @Composable () -> |
| Unit |
| ) { |
| Layout( |
| children = children, |
| modifier = modifier, |
| measureBlock = remember<MeasureBlock2>(width, height) { |
| { measurables, _ -> |
| val constraint = Constraints(maxWidth = width, maxHeight = height) |
| layout(width, height) { |
| measurables.forEach { |
| val placeable = it.measure(constraint) |
| placeable.place( |
| (width - placeable.width) / 2, |
| (height - placeable.height) / 2 |
| ) |
| } |
| } |
| } |
| } |
| ) |
| } |
| |
| @Composable |
| fun ContainerChildrenAffectsParentSize( |
| width: Int, |
| height: Int, |
| children: @Composable () -> Unit |
| ) { |
| Layout(children = children, measureBlock = remember<MeasureBlock2>(width, height) { |
| { measurables, _ -> |
| val constraint = Constraints(maxWidth = width, maxHeight = height) |
| val placeables = measurables.map { it.measure(constraint) } |
| layout(width, height) { |
| placeables.forEach { |
| it.place((width - width) / 2, (height - height) / 2) |
| } |
| } |
| } |
| }) |
| } |
| |
| @Composable |
| private fun ChangingConstraintsLayout(size: State<Int>, children: @Composable () -> Unit) { |
| Layout(children) { measurables, _ -> |
| layout(100, 100) { |
| val constraints = Constraints.fixed(size.value, size.value) |
| measurables.first().measure(constraints).place(0, 0) |
| } |
| } |
| } |
| |
| @Composable |
| private fun ChangingLayoutDirectionLayout( |
| direction: State<LayoutDirection>, |
| children: @Composable () -> Unit |
| ) { |
| Layout(children) { measurables, _ -> |
| layout(100, 100) { |
| val constraints = Constraints.fixed(100, 100) |
| measurables.first().measure(constraints, direction.value).place(0, 0) |
| } |
| } |
| } |
| |
| fun backgroundModifier(color: Color) = Modifier.drawBehind { |
| drawRect(color) |
| } |
| |
| val infiniteConstraints = object : LayoutModifier { |
| override fun MeasureScope.measure( |
| measurable: Measurable, |
| constraints: Constraints, |
| layoutDirection: LayoutDirection |
| ): MeasureScope.MeasureResult { |
| val placeable = measurable.measure(Constraints()) |
| return layout(constraints.maxWidth, constraints.maxHeight) { |
| placeable.place(0, 0) |
| } |
| } |
| } |