| /* |
| * Copyright 2020 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.ui.core.test |
| |
| import android.os.Build |
| import androidx.compose.Composable |
| import androidx.compose.mutableStateOf |
| import androidx.test.filters.SdkSuppress |
| import androidx.test.filters.SmallTest |
| import androidx.ui.core.Constraints |
| import androidx.ui.core.IntrinsicMeasurable |
| import androidx.ui.core.IntrinsicMeasureScope |
| import androidx.ui.core.Layout |
| import androidx.ui.core.LayoutDirection |
| import androidx.ui.core.LayoutModifier |
| import androidx.ui.core.Measurable |
| import androidx.ui.core.MeasureScope |
| import androidx.ui.core.Modifier |
| import androidx.ui.core.Ref |
| import androidx.ui.core.offset |
| import androidx.ui.core.onPositioned |
| import androidx.ui.core.setContent |
| import androidx.ui.geometry.Offset |
| import androidx.ui.graphics.Color |
| import androidx.ui.layout.Stack |
| import androidx.ui.layout.ltr |
| import androidx.ui.layout.padding |
| import androidx.ui.layout.rtl |
| import androidx.ui.layout.size |
| import androidx.ui.unit.Density |
| import androidx.ui.unit.Dp |
| import androidx.ui.unit.dp |
| import org.junit.Assert |
| 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 RtlLayoutTest { |
| @Suppress("DEPRECATION") |
| @get:Rule |
| val activityTestRule = |
| androidx.test.rule.ActivityTestRule<androidx.ui.framework.test.TestActivity>( |
| androidx.ui.framework.test.TestActivity::class.java |
| ) |
| private lateinit var activity: androidx.ui.framework.test.TestActivity |
| internal lateinit var density: Density |
| internal lateinit var countDownLatch: CountDownLatch |
| internal lateinit var position: Array<Ref<Offset>> |
| private val size = 100 |
| |
| @Before |
| fun setup() { |
| activity = activityTestRule.activity |
| density = Density(activity) |
| activity.hasFocusLatch.await(5, TimeUnit.SECONDS) |
| position = Array(3) { Ref<Offset>() } |
| countDownLatch = CountDownLatch(3) |
| } |
| |
| @Test |
| fun customLayout_absolutePositioning() = with(density) { |
| activityTestRule.runOnUiThreadIR { |
| activity.setContent { |
| CustomLayout(true, LayoutDirection.Ltr) |
| } |
| } |
| |
| countDownLatch.await(1, TimeUnit.SECONDS) |
| Assert.assertEquals(Offset(0f, 0f), position[0].value) |
| Assert.assertEquals(Offset(size.toFloat(), size.toFloat()), position[1].value) |
| Assert.assertEquals( |
| Offset( |
| (size * 2).toFloat(), |
| (size * 2).toFloat() |
| ), |
| position[2].value |
| ) |
| } |
| |
| @Test |
| fun customLayout_absolutePositioning_rtl() = with(density) { |
| activityTestRule.runOnUiThreadIR { |
| activity.setContent { |
| CustomLayout(true, LayoutDirection.Rtl) |
| } |
| } |
| |
| countDownLatch.await(1, TimeUnit.SECONDS) |
| Assert.assertEquals( |
| Offset(0f, 0f), |
| position[0].value |
| ) |
| Assert.assertEquals( |
| Offset( |
| size.toFloat(), |
| size.toFloat() |
| ), |
| position[1].value |
| ) |
| Assert.assertEquals( |
| Offset( |
| (size * 2).toFloat(), |
| (size * 2).toFloat() |
| ), |
| position[2].value |
| ) |
| } |
| |
| @Test |
| fun customLayout_positioning() = with(density) { |
| activityTestRule.runOnUiThreadIR { |
| activity.setContent { |
| CustomLayout(false, LayoutDirection.Ltr) |
| } |
| } |
| |
| countDownLatch.await(1, TimeUnit.SECONDS) |
| Assert.assertEquals(Offset(0f, 0f), position[0].value) |
| Assert.assertEquals(Offset(size.toFloat(), size.toFloat()), position[1].value) |
| Assert.assertEquals( |
| Offset( |
| (size * 2).toFloat(), |
| (size * 2).toFloat() |
| ), |
| position[2].value |
| ) |
| } |
| |
| @Test |
| fun customLayout_positioning_rtl() = with(density) { |
| activityTestRule.runOnUiThreadIR { |
| activity.setContent { |
| CustomLayout(false, LayoutDirection.Rtl) |
| } |
| } |
| |
| countDownLatch.await(1, TimeUnit.SECONDS) |
| |
| countDownLatch.await(1, TimeUnit.SECONDS) |
| Assert.assertEquals( |
| Offset( |
| (size * 2).toFloat(), |
| 0f |
| ), |
| position[0].value |
| ) |
| Assert.assertEquals( |
| Offset(size.toFloat(), size.toFloat()), |
| position[1].value |
| ) |
| Assert.assertEquals(Offset(0f, (size * 2).toFloat()), position[2].value) |
| } |
| |
| @Test |
| fun customLayout_updatingDirectionCausesRemeasure() { |
| val direction = mutableStateOf(LayoutDirection.Rtl) |
| var latch = CountDownLatch(1) |
| var actualDirection: LayoutDirection? = null |
| |
| activityTestRule.runOnUiThread { |
| activity.setContent { |
| val children = @Composable { |
| Layout({}) { _, _ -> |
| actualDirection = layoutDirection |
| latch.countDown() |
| layout(100, 100) {} |
| } |
| } |
| Layout(children) { measurables, constraints -> |
| layout(100, 100) { |
| measurables.first().measure(constraints, direction.value) |
| .place(0, 0) |
| } |
| } |
| } |
| } |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| assertEquals(LayoutDirection.Rtl, actualDirection) |
| |
| latch = CountDownLatch(1) |
| activityTestRule.runOnUiThread { direction.value = LayoutDirection.Ltr } |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| assertEquals(LayoutDirection.Ltr, actualDirection) |
| } |
| |
| @Test |
| @SdkSuppress(minSdkVersion = Build.VERSION_CODES.O) |
| fun measurement_subsequentChanges() = with(density) { |
| // The layout is a 100.dp white square, wrapped by 10.dp blue padding, wrapped by |
| // 10.dp green padding, wrapped by 10.dp gray padding, wrapped by 10.dp magenta padding. |
| // The test is asserting layout direction changes using modifiers and Layouts, and also |
| // the propagation of layout direction across modifiers and layouts that are not changing |
| // it. Padding is also added to the start, but the obtained padding is visually symmetrical |
| // due to the layout direction changes. |
| activityTestRule.runOnUiThreadIR { |
| activity.setContent { |
| Stack( |
| Modifier |
| // White space padding. |
| .padding(10.dp) |
| // Magenta 10.dp padding. |
| .rtl |
| .background(Color.Magenta) |
| .padding(top = 10.dp, bottom = 10.dp) |
| .padding(start = 10.dp) |
| .ltr |
| .padding(start = 10.dp) |
| ) { |
| Stack(Modifier.rtl) { |
| Stack( |
| Modifier |
| // Gray 10.dp padding. |
| .background(Color.Gray) |
| .padding(top = 10.dp, bottom = 10.dp) |
| .padding(start = 10.dp) |
| .ltr |
| .padding(start = 10.dp) |
| ) { |
| UpdateLayoutDirection(LayoutDirection.Rtl) { |
| // Green 10.dp padding. |
| Stack( |
| Modifier |
| .background(Color.Green) |
| .padding(top = 10.dp, bottom = 10.dp) |
| .padding(start = 10.dp) |
| .ltr |
| .padding(start = 10.dp) |
| .rtl |
| ) { |
| // Blue 10.dp padding. |
| Stack(Modifier.background(Color.Blue)) { |
| Padding( |
| start = 10.dp, |
| top = 10.dp, |
| end = 0.dp, |
| bottom = 10.dp |
| ) { |
| UpdateLayoutDirection(LayoutDirection.Ltr) { |
| Padding( |
| start = 10.dp, |
| top = 0.dp, |
| end = 0.dp, |
| bottom = 0.dp |
| ) { |
| Stack(Modifier |
| .background(Color.White) |
| .size(100.dp)) {} |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| activityTestRule.waitAndScreenShot().apply { |
| val center = 200.dp.toIntPx() / 2 |
| assertRect( |
| Color.Magenta, 161.dp.toIntPx(), 179.dp.toIntPx(), center, center |
| ) |
| assertRect(Color.Gray, 141.dp.toIntPx(), 159.dp.toIntPx(), center, center) |
| assertRect(Color.Green, 121.dp.toIntPx(), 139.dp.toIntPx(), center, center) |
| assertRect(Color.Blue, 101.dp.toIntPx(), 119.dp.toIntPx(), center, center) |
| } |
| Unit |
| } |
| |
| @Test |
| fun intrinsics_subsequentChanges() { |
| val latch = CountDownLatch(1) |
| activityTestRule.runOnUiThreadIR { |
| activity.setContent { |
| Stack(Modifier |
| .queryIntrinsics() |
| .rtl |
| .assertLayoutDirection(LayoutDirection.Rtl) |
| .ltr |
| .assertLayoutDirection(LayoutDirection.Ltr) |
| .rtl |
| ) { |
| Layout( |
| children = {}, |
| minIntrinsicWidthMeasureBlock = { _, _ -> |
| assertEquals(LayoutDirection.Rtl, layoutDirection) |
| 0 |
| }, |
| minIntrinsicHeightMeasureBlock = { _, _ -> |
| assertEquals(LayoutDirection.Rtl, layoutDirection) |
| 0 |
| }, |
| maxIntrinsicWidthMeasureBlock = { _, _ -> |
| assertEquals(LayoutDirection.Rtl, layoutDirection) |
| 0 |
| }, |
| maxIntrinsicHeightMeasureBlock = { _, _ -> |
| assertEquals(LayoutDirection.Rtl, layoutDirection) |
| 0 |
| } |
| ) { _, _ -> |
| assertEquals(LayoutDirection.Rtl, layoutDirection) |
| latch.countDown() |
| layout(0, 0) {} |
| } |
| } |
| } |
| } |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| } |
| |
| @Composable |
| private fun CustomLayout( |
| absolutePositioning: Boolean, |
| testLayoutDirection: LayoutDirection |
| ) { |
| val modifier = when (testLayoutDirection) { |
| LayoutDirection.Ltr -> Modifier.ltr |
| LayoutDirection.Rtl -> Modifier.rtl |
| } |
| Layout( |
| children = @Composable { |
| FixedSize(size, modifier = saveLayoutInfo(position[0], countDownLatch)) { |
| } |
| FixedSize(size, modifier = saveLayoutInfo(position[1], countDownLatch)) { |
| } |
| FixedSize(size, modifier = saveLayoutInfo(position[2], countDownLatch)) { |
| } |
| }, |
| modifier = modifier |
| ) { measurables, constraints -> |
| val placeables = measurables.map { it.measure(constraints) } |
| val width = placeables.fold(0) { sum, p -> sum + p.width } |
| val height = placeables.fold(0) { sum, p -> sum + p.height } |
| layout(width, height) { |
| var x = 0f |
| var y = 0f |
| for (placeable in placeables) { |
| if (absolutePositioning) { |
| placeable.placeAbsolute(Offset(x, y)) |
| } else { |
| placeable.place(Offset(x, y)) |
| } |
| x += placeable.width.toFloat() |
| y += placeable.height.toFloat() |
| } |
| } |
| } |
| } |
| |
| @Composable |
| private fun UpdateLayoutDirection(ld: LayoutDirection, children: @Composable () -> Unit) { |
| Layout(children) { measurables, constraints -> |
| val placeable = measurables[0].measure(constraints, ld) |
| layout(placeable.width, placeable.height) { |
| placeable.place(0, 0) |
| } |
| } |
| } |
| |
| @Composable |
| private fun Padding( |
| start: Dp, |
| top: Dp, |
| end: Dp, |
| bottom: Dp, |
| children: @Composable () -> Unit |
| ) { |
| Layout(children) { measurables, constraints -> |
| val childConstraints = constraints.offset( |
| -start.toIntPx() - end.toIntPx(), |
| -top.toIntPx() - bottom.toIntPx() |
| ) |
| val placeable = measurables[0].measure(childConstraints) |
| layout( |
| placeable.width + start.toIntPx() + end.toIntPx(), |
| placeable.height + top.toIntPx() + bottom.toIntPx() |
| ) { |
| placeable.place(start.toIntPx(), top.toIntPx()) |
| } |
| } |
| } |
| |
| private fun Modifier.queryIntrinsics() = this + object : LayoutModifier { |
| override fun MeasureScope.measure( |
| measurable: Measurable, |
| constraints: Constraints, |
| layoutDirection: LayoutDirection |
| ): MeasureScope.MeasureResult { |
| measurable.minIntrinsicWidth(0, layoutDirection) |
| measurable.minIntrinsicHeight(0, layoutDirection) |
| measurable.maxIntrinsicWidth(0, layoutDirection) |
| measurable.maxIntrinsicHeight(0, layoutDirection) |
| measurable.minIntrinsicWidth(0) |
| measurable.minIntrinsicHeight(0) |
| measurable.maxIntrinsicWidth(0) |
| measurable.maxIntrinsicHeight(0) |
| val placeable = measurable.measure(constraints) |
| return layout(placeable.width, placeable.height) { |
| placeable.place(0, 0) |
| } |
| } |
| } |
| |
| @Composable |
| private fun saveLayoutInfo( |
| position: Ref<Offset>, |
| countDownLatch: CountDownLatch |
| ): Modifier = Modifier.onPositioned { |
| position.value = it.localToRoot(Offset(0f, 0f)) |
| countDownLatch.countDown() |
| } |
| } |
| |
| private fun Modifier.assertLayoutDirection(expectedLayoutDirection: LayoutDirection): Modifier = |
| this + object : LayoutModifier { |
| override fun MeasureScope.measure( |
| measurable: Measurable, |
| constraints: Constraints, |
| layoutDirection: LayoutDirection |
| ): MeasureScope.MeasureResult { |
| assertEquals(expectedLayoutDirection, layoutDirection) |
| val placeable = measurable.measure(constraints) |
| return layout(placeable.width, placeable.height) { |
| placeable.place(0, 0) |
| } |
| } |
| |
| override fun IntrinsicMeasureScope.minIntrinsicWidth( |
| measurable: IntrinsicMeasurable, |
| height: Int, |
| layoutDirection: LayoutDirection |
| ): Int { |
| assertEquals(expectedLayoutDirection, layoutDirection) |
| measurable.minIntrinsicWidth(height) |
| return measurable.minIntrinsicWidth(height, layoutDirection) |
| } |
| |
| override fun IntrinsicMeasureScope.minIntrinsicHeight( |
| measurable: IntrinsicMeasurable, |
| width: Int, |
| layoutDirection: LayoutDirection |
| ): Int { |
| assertEquals(expectedLayoutDirection, layoutDirection) |
| measurable.minIntrinsicHeight(width) |
| return measurable.minIntrinsicHeight(width, layoutDirection) |
| } |
| |
| override fun IntrinsicMeasureScope.maxIntrinsicWidth( |
| measurable: IntrinsicMeasurable, |
| height: Int, |
| layoutDirection: LayoutDirection |
| ): Int { |
| assertEquals(expectedLayoutDirection, layoutDirection) |
| measurable.maxIntrinsicWidth(height) |
| return measurable.maxIntrinsicWidth(height, layoutDirection) |
| } |
| |
| override fun IntrinsicMeasureScope.maxIntrinsicHeight( |
| measurable: IntrinsicMeasurable, |
| width: Int, |
| layoutDirection: LayoutDirection |
| ): Int { |
| assertEquals(expectedLayoutDirection, layoutDirection) |
| measurable.maxIntrinsicHeight(width) |
| return measurable.maxIntrinsicHeight(width, layoutDirection) |
| } |
| } |