| /* |
| * 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. |
| */ |
| |
| @file:Suppress("DEPRECATION") |
| |
| package androidx.compose.ui.layout |
| |
| import android.view.View |
| import android.view.ViewGroup |
| import android.widget.FrameLayout |
| import android.widget.LinearLayout |
| import android.widget.ScrollView |
| import androidx.compose.foundation.Box |
| import androidx.compose.foundation.layout.size |
| import androidx.compose.runtime.Composable |
| import androidx.compose.runtime.Recomposer |
| import androidx.compose.runtime.emptyContent |
| import androidx.compose.runtime.getValue |
| import androidx.compose.runtime.mutableStateOf |
| import androidx.compose.runtime.setValue |
| import androidx.compose.ui.AtLeastSize |
| import androidx.compose.ui.FixedSize |
| import androidx.compose.ui.Layout |
| import androidx.compose.ui.Modifier |
| import androidx.compose.ui.PaddingModifier |
| import androidx.compose.ui.SimpleRow |
| import androidx.compose.ui.Wrap |
| import androidx.compose.ui.geometry.Offset |
| import androidx.compose.ui.geometry.Rect |
| import androidx.compose.ui.onChildPositioned |
| import androidx.compose.ui.onPositioned |
| import androidx.compose.ui.platform.DensityAmbient |
| import androidx.compose.ui.platform.setContent |
| import androidx.compose.ui.runOnUiThreadIR |
| import androidx.compose.ui.test.TestActivity |
| import androidx.compose.ui.unit.Constraints |
| import androidx.test.filters.SmallTest |
| import org.junit.Assert.assertEquals |
| import org.junit.Assert.assertFalse |
| import org.junit.Assert.assertNotNull |
| 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 OnPositionedTest { |
| |
| @Suppress("DEPRECATION") |
| @get:Rule |
| val rule = androidx.test.rule.ActivityTestRule<TestActivity>(TestActivity::class.java) |
| private lateinit var activity: TestActivity |
| |
| @Before |
| fun setup() { |
| activity = rule.activity |
| activity.hasFocusLatch.await(5, TimeUnit.SECONDS) |
| } |
| |
| @Test |
| fun handlesChildrenNodeMoveCorrectly() { |
| val size = 50 |
| var index by mutableStateOf(0) |
| var latch = CountDownLatch(2) |
| var wrap1Position = 0f |
| var wrap2Position = 0f |
| rule.runOnUiThread { |
| activity.setContent { |
| SimpleRow { |
| for (i in 0 until 2) { |
| if (index == i) { |
| Wrap( |
| minWidth = size, |
| minHeight = size, |
| modifier = Modifier.onPositioned { coordinates -> |
| wrap1Position = coordinates.globalPosition.x |
| latch.countDown() |
| } |
| ) |
| } else { |
| Wrap( |
| minWidth = size, |
| minHeight = size, |
| modifier = Modifier.onPositioned { coordinates -> |
| wrap2Position = coordinates.globalPosition.x |
| latch.countDown() |
| } |
| ) |
| } |
| } |
| } |
| } |
| } |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| assertEquals(0f, wrap1Position) |
| assertEquals(size.toFloat(), wrap2Position) |
| latch = CountDownLatch(2) |
| rule.runOnUiThread { |
| index = 1 |
| } |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| assertEquals(size.toFloat(), wrap1Position) |
| assertEquals(0f, wrap2Position) |
| } |
| |
| @Test |
| fun callbacksAreCalledWhenChildResized() { |
| var size by mutableStateOf(10) |
| var realSize = 0 |
| var realChildSize = 0 |
| var latch = CountDownLatch(1) |
| var childLatch = CountDownLatch(1) |
| rule.runOnUiThreadIR { |
| activity.setContent { |
| AtLeastSize(size = 20, modifier = Modifier.onChildPositioned { |
| realSize = it.size.width |
| latch.countDown() |
| }) { |
| Wrap(minWidth = size, minHeight = size, modifier = Modifier.onPositioned { |
| realChildSize = it.size.width |
| childLatch.countDown() |
| }) |
| } |
| } |
| } |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| assertTrue(childLatch.await(1, TimeUnit.SECONDS)) |
| assertEquals(10, realSize) |
| assertEquals(10, realChildSize) |
| |
| latch = CountDownLatch(1) |
| childLatch = CountDownLatch(1) |
| rule.runOnUiThread { |
| size = 15 |
| } |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| assertTrue(childLatch.await(1, TimeUnit.SECONDS)) |
| assertEquals(15, realSize) |
| assertEquals(15, realChildSize) |
| } |
| |
| @Test |
| fun callbackCalledForChildWhenParentMoved() { |
| var position by mutableStateOf(0) |
| var childGlobalPosition = Offset(0f, 0f) |
| var latch = CountDownLatch(1) |
| rule.runOnUiThreadIR { |
| activity.setContent { |
| Layout( |
| measureBlock = { measurables, constraints -> |
| layout(10, 10) { |
| measurables[0].measure(constraints).place(position, 0) |
| } |
| }, |
| children = { |
| Wrap( |
| minWidth = 10, |
| minHeight = 10 |
| ) { |
| Wrap( |
| minWidth = 10, |
| minHeight = 10, |
| modifier = Modifier.onPositioned { coordinates -> |
| childGlobalPosition = coordinates.positionInRoot |
| latch.countDown() |
| } |
| ) |
| } |
| } |
| ) |
| } |
| } |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| |
| latch = CountDownLatch(1) |
| rule.runOnUiThread { |
| position = 10 |
| } |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| assertEquals(Offset(10f, 0f), childGlobalPosition) |
| } |
| |
| @Test |
| fun callbacksAreCalledOnlyForPositionedChildren() { |
| val latch = CountDownLatch(1) |
| var wrap1OnPositionedCalled = false |
| var wrap2OnPositionedCalled = false |
| var onChildPositionedCalledTimes = 0 |
| rule.runOnUiThread { |
| activity.setContent { |
| Layout( |
| modifier = Modifier.onChildPositioned { |
| onChildPositionedCalledTimes++ |
| }, |
| measureBlock = { measurables, constraints -> |
| layout(10, 10) { |
| measurables[1].measure(constraints).place(0, 0) |
| } |
| }, |
| children = { |
| Wrap( |
| minWidth = 10, |
| minHeight = 10, |
| modifier = Modifier.onPositioned { |
| wrap1OnPositionedCalled = true |
| } |
| ) |
| Wrap( |
| minWidth = 10, |
| minHeight = 10, |
| modifier = Modifier.onPositioned { |
| wrap2OnPositionedCalled = true |
| } |
| ) { |
| Wrap( |
| minWidth = 10, |
| minHeight = 10, |
| modifier = Modifier.onPositioned { |
| latch.countDown() |
| } |
| ) |
| } |
| } |
| ) |
| } |
| } |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| assertFalse(wrap1OnPositionedCalled) |
| assertTrue(wrap2OnPositionedCalled) |
| assertEquals(1, onChildPositionedCalledTimes) |
| } |
| |
| @Test |
| fun testPositionInParent() { |
| val positionedLatch = CountDownLatch(1) |
| var coordinates: LayoutCoordinates? = null |
| |
| rule.runOnUiThread { |
| activity.setContent { |
| FixedSize(10, |
| PaddingModifier(5).then(Modifier.onPositioned { |
| coordinates = it |
| positionedLatch.countDown() |
| }) |
| ) { |
| } |
| } |
| } |
| assertTrue(positionedLatch.await(1, TimeUnit.SECONDS)) |
| |
| rule.runOnUiThread { |
| assertEquals(Offset(5f, 5f), coordinates!!.positionInParent) |
| |
| var root = coordinates!! |
| while (root.parentCoordinates != null) { |
| root = root.parentCoordinates!! |
| } |
| |
| assertEquals(Offset.Zero, root.positionInParent) |
| } |
| } |
| |
| @Test |
| fun testBoundsInParent() { |
| val positionedLatch = CountDownLatch(1) |
| var coordinates: LayoutCoordinates? = null |
| |
| rule.runOnUiThread { |
| activity.setContent { |
| FixedSize(10, |
| PaddingModifier(5).then(Modifier.onPositioned { |
| coordinates = it |
| positionedLatch.countDown() |
| }) |
| ) { |
| } |
| } |
| } |
| assertTrue(positionedLatch.await(1, TimeUnit.SECONDS)) |
| |
| rule.runOnUiThread { |
| assertEquals(Rect(5f, 5f, 15f, 15f), coordinates!!.boundsInParent) |
| |
| var root = coordinates!! |
| while (root.parentCoordinates != null) { |
| root = root.parentCoordinates!! |
| } |
| |
| assertEquals(Rect(0f, 0f, 20f, 20f), root.boundsInParent) |
| } |
| } |
| |
| @Test |
| fun onPositionedIsCalledWhenComposeContainerIsScrolled() { |
| var positionedLatch = CountDownLatch(1) |
| var coordinates: LayoutCoordinates? = null |
| var scrollView: ScrollView? = null |
| var frameLayout: FrameLayout? = null |
| |
| rule.runOnUiThread { |
| scrollView = ScrollView(rule.activity) |
| activity.setContentView(scrollView, ViewGroup.LayoutParams(100, 100)) |
| frameLayout = FrameLayout(rule.activity) |
| scrollView!!.addView(frameLayout) |
| frameLayout?.setContent(Recomposer.current()) { |
| Layout({}, modifier = Modifier.onPositioned { |
| coordinates = it |
| positionedLatch.countDown() |
| }) { _, _ -> |
| layout(100, 200) {} |
| } |
| } |
| } |
| assertTrue(positionedLatch.await(1, TimeUnit.SECONDS)) |
| positionedLatch = CountDownLatch(1) |
| |
| rule.runOnUiThread { |
| scrollView!!.scrollBy(0, 50) |
| } |
| |
| assertTrue( |
| "OnPositioned is not called when the container scrolled", |
| positionedLatch.await(1, TimeUnit.SECONDS) |
| ) |
| // There is a bug on older devices where the location isn't exactly 50 |
| // pixels off of the start position, even though we've scrolled by 50 pixels. |
| val position = intArrayOf(0, 0) |
| rule.runOnUiThread { |
| frameLayout?.getLocationOnScreen(position) |
| } |
| assertEquals(position[1].toFloat(), coordinates!!.globalPosition.y) |
| } |
| |
| @Test |
| fun onPositionedIsCalledWhenComposeContainerPositionChanged() { |
| var positionedLatch = CountDownLatch(1) |
| var coordinates: LayoutCoordinates? = null |
| var topView: View? = null |
| |
| rule.runOnUiThread { |
| val linearLayout = LinearLayout(rule.activity) |
| linearLayout.orientation = LinearLayout.VERTICAL |
| activity.setContentView(linearLayout, ViewGroup.LayoutParams(100, 200)) |
| topView = View(rule.activity) |
| linearLayout.addView(topView!!, ViewGroup.LayoutParams(100, 100)) |
| val frameLayout = FrameLayout(rule.activity) |
| linearLayout.addView(frameLayout, ViewGroup.LayoutParams(100, 100)) |
| frameLayout.setContent(Recomposer.current()) { |
| Layout({}, modifier = Modifier.onPositioned { |
| coordinates = it |
| positionedLatch.countDown() |
| }) { _, constraints -> |
| layout(constraints.maxWidth, constraints.maxHeight) {} |
| } |
| } |
| } |
| assertTrue(positionedLatch.await(1, TimeUnit.SECONDS)) |
| val startY = coordinates!!.globalPosition.y |
| positionedLatch = CountDownLatch(1) |
| |
| rule.runOnUiThread { |
| topView!!.visibility = View.GONE |
| } |
| |
| assertTrue("OnPositioned is not called when the container moved", |
| positionedLatch.await(1, TimeUnit.SECONDS)) |
| assertEquals(startY - 100f, coordinates!!.globalPosition.y) |
| } |
| |
| @Test |
| fun onPositionedCalledInDifferentPartsOfHierarchy() { |
| var positionedLatch = CountDownLatch(2) |
| var coordinates1: LayoutCoordinates? = null |
| var coordinates2: LayoutCoordinates? = null |
| var size by mutableStateOf(10f) |
| |
| rule.runOnUiThread { |
| activity.setContent { |
| with(DensityAmbient.current) { |
| DelayedMeasure(50) { |
| Box(Modifier.size(25.toDp())) { |
| Box(Modifier.size(size.toDp()) |
| .onPositioned { |
| coordinates1 = it |
| positionedLatch.countDown() |
| }) |
| } |
| Box(Modifier.size(25.toDp())) { |
| Box(Modifier.size(size.toDp()) |
| .onPositioned { |
| coordinates2 = it |
| positionedLatch.countDown() |
| }) |
| } |
| } |
| } |
| } |
| } |
| assertTrue(positionedLatch.await(1, TimeUnit.SECONDS)) |
| assertNotNull(coordinates1) |
| assertNotNull(coordinates2) |
| positionedLatch = CountDownLatch(2) |
| |
| rule.runOnUiThread { |
| size = 15f |
| } |
| |
| assertTrue(positionedLatch.await(1, TimeUnit.SECONDS)) |
| } |
| } |
| |
| @Composable |
| fun DelayedMeasure( |
| size: Int, |
| modifier: Modifier = Modifier, |
| children: @Composable () -> Unit = emptyContent() |
| ) { |
| Layout(children = children, modifier = modifier) { measurables, _ -> |
| layout(size, size) { |
| val newConstraints = Constraints(maxWidth = size, maxHeight = size) |
| val placeables = measurables.map { m -> |
| m.measure(newConstraints) |
| } |
| placeables.forEach { child -> |
| child.place(0, 0) |
| } |
| } |
| } |
| } |
