| /* |
| * 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.ui.core |
| |
| import androidx.compose.runtime.Composable |
| import androidx.compose.runtime.MutableState |
| import androidx.compose.runtime.state |
| import androidx.test.filters.LargeTest |
| import androidx.ui.benchmark.ComposeBenchmarkRule |
| import androidx.ui.benchmark.toggleStateBenchmarkLayout |
| import androidx.compose.foundation.Box |
| import androidx.compose.foundation.ContentGravity |
| import androidx.ui.integration.test.ToggleableTestCase |
| import androidx.compose.foundation.layout.Stack |
| import androidx.compose.foundation.layout.preferredSize |
| import androidx.ui.test.ComposeTestCase |
| import androidx.compose.ui.unit.Dp |
| import androidx.compose.ui.unit.dp |
| import org.junit.Rule |
| import org.junit.Test |
| import org.junit.runner.RunWith |
| import org.junit.runners.JUnit4 |
| |
| @LargeTest |
| @RunWith(JUnit4::class) |
| class OnPositionedBenchmark { |
| |
| @get:Rule |
| val benchmarkRule = ComposeBenchmarkRule() |
| |
| @Test |
| fun deepHierarchyOnPositioned_layout() { |
| benchmarkRule.toggleStateBenchmarkLayout({ |
| DeepHierarchyOnPositionedTestCase() |
| }) |
| } |
| } |
| |
| private class DeepHierarchyOnPositionedTestCase : |
| ComposeTestCase, ToggleableTestCase { |
| |
| private lateinit var state: MutableState<Dp> |
| |
| @Composable |
| override fun emitContent() { |
| val size = state { 200.dp } |
| this.state = size |
| Stack { |
| Box(Modifier.preferredSize(size.value), gravity = ContentGravity.Center) { |
| StaticChildren(100) |
| } |
| } |
| } |
| |
| @Composable |
| private fun StaticChildren(count: Int) { |
| if (count > 0) { |
| val modifier = if (count == 1) { |
| Modifier.onPositioned { it.size } |
| } else { |
| Modifier |
| } |
| Box(Modifier.preferredSize(100.dp).then(modifier), gravity = ContentGravity.Center) { |
| StaticChildren(count - 1) |
| } |
| } |
| } |
| |
| override fun toggleState() { |
| state.value = if (state.value == 200.dp) 150.dp else 200.dp |
| } |
| } |