| /* |
| * Copyright 2023 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.material3.adaptive |
| |
| import android.app.Activity |
| import androidx.compose.material3.windowsizeclass.ExperimentalMaterial3WindowSizeClassApi |
| import androidx.compose.material3.windowsizeclass.WindowSizeClass |
| import androidx.compose.runtime.Composable |
| import androidx.compose.runtime.State |
| import androidx.compose.runtime.collectAsState |
| import androidx.compose.runtime.mutableStateOf |
| import androidx.compose.runtime.remember |
| import androidx.compose.ui.platform.LocalConfiguration |
| import androidx.compose.ui.platform.LocalContext |
| import androidx.compose.ui.platform.LocalDensity |
| import androidx.compose.ui.unit.IntSize |
| import androidx.compose.ui.unit.toSize |
| import androidx.window.layout.FoldingFeature |
| import androidx.window.layout.WindowInfoTracker |
| import androidx.window.layout.WindowMetricsCalculator |
| import kotlinx.coroutines.flow.map |
| |
| /** |
| * Calculates and returns [WindowAdaptiveInfo] of the provided context. It's a convenient function |
| * that uses the Material default [WindowSizeClass.calculateFromSize] and [calculatePosture] |
| * functions to retrieve [WindowSizeClass] and [Posture]. |
| * |
| * @return [WindowAdaptiveInfo] of the provided context |
| */ |
| @ExperimentalMaterial3AdaptiveApi |
| @OptIn(ExperimentalMaterial3WindowSizeClassApi::class) |
| @Composable |
| fun currentWindowAdaptiveInfo(): WindowAdaptiveInfo = |
| WindowAdaptiveInfo( |
| WindowSizeClass.calculateFromSize( |
| with(LocalDensity.current) { |
| collectWindowSizeAsState().value.toSize().toDpSize() |
| } |
| ), |
| calculatePosture(collectFoldingFeaturesAsState().value) |
| ) |
| |
| /** |
| * Collects the current window size from [WindowMetricsCalculator] in to a [State]. |
| * |
| * @return a [State] of [IntSize] that represents the current window size. |
| */ |
| @ExperimentalMaterial3AdaptiveApi |
| @Composable |
| fun collectWindowSizeAsState(): State<IntSize> { |
| val size = remember { |
| mutableStateOf(IntSize(0, 0)) |
| } |
| |
| // Observe view configuration changes and recalculate the size class on each change. We can't |
| // use Activity#onConfigurationChanged as this will sometimes fail to be called on different |
| // API levels, hence why this function needs to be @Composable so we can observe the |
| // ComposeView's configuration changes. |
| val context = LocalContext.current |
| size.value = remember(context, LocalConfiguration.current) { |
| val windowBounds = |
| WindowMetricsCalculator |
| .getOrCreate() |
| .computeCurrentWindowMetrics(context) |
| .bounds |
| IntSize(windowBounds.width(), windowBounds.height()) |
| } |
| |
| return size |
| } |
| |
| /** |
| * Collects the current window folding features from [WindowInfoTracker] in to a [State]. |
| * |
| * @return a [State] of a [FoldingFeature] list. |
| */ |
| @ExperimentalMaterial3AdaptiveApi |
| @Composable |
| fun collectFoldingFeaturesAsState(): State<List<FoldingFeature>> { |
| val context = LocalContext.current |
| return remember(context) { |
| if (context is Activity) { |
| // TODO(b/284347941) remove the instance check after the test bug is fixed. |
| WindowInfoTracker |
| .getOrCreate(context) |
| .windowLayoutInfo(context) |
| } else { |
| WindowInfoTracker |
| .getOrCreate(context) |
| .windowLayoutInfo(context) |
| }.map { it.displayFeatures.filterIsInstance<FoldingFeature>() } |
| }.collectAsState(emptyList()) |
| } |
