Add results module

demo/build.gradle.kts

@@ -60,8 +60,9 @@ kotlinter {
 dependencies {
 	implementation(projects.bottomsheet)
 	implementation(projects.modalsheet)
+	implementation(projects.results)
 
-	implementation(libs.kotlin.serialization)
+	implementation(libs.kotlin.serialization.core)
 	implementation(libs.compose.material3)
 	implementation(libs.navigation.compose)
 }

demo/src/main/kotlin/dev/hrach/navigation/demo/Destinations.kt

@@ -19,5 +19,10 @@ internal object Destinations {
 	data object Modal2
 
 	@Serializable
-	data object BottomSheet
+	data object BottomSheet {
+		@Serializable
+		data class Result(
+			val id: Int,
+		)
+	}
 }

demo/src/main/kotlin/dev/hrach/navigation/demo/screens/BottomSheet.kt

@@ -14,14 +14,23 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
 import androidx.navigation.NavController
+import dev.hrach.navigation.demo.Destinations
+import dev.hrach.navigation.results.setResult
+import kotlin.random.Random
 
 @Composable
 internal fun BottomSheet(navController: NavController) {
 	Column(Modifier.padding(horizontal = 16.dp)) {
 		Text("This is a bottomsheet")
 		var value by rememberSaveable { mutableStateOf("") }
 		OutlinedTextField(value = value, onValueChange = { value = it })
-		OutlinedButton(onClick = { navController.popBackStack() }, Modifier.fillMaxWidth()) {
+		OutlinedButton(
+			onClick = {
+				navController.setResult(Destinations.BottomSheet.Result(Random.nextInt()))
+				navController.popBackStack()
+			},
+			modifier = Modifier.fillMaxWidth(),
+		) {
 			Text("Close")
 		}
 	}

demo/src/main/kotlin/dev/hrach/navigation/demo/screens/Home.kt

@@ -1,25 +1,53 @@
 package dev.hrach.navigation.demo.screens
 
+import android.annotation.SuppressLint
 import androidx.compose.foundation.layout.Column
 import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.saveable.rememberSaveable
+import androidx.compose.runtime.setValue
 import androidx.navigation.NavController
 import dev.hrach.navigation.demo.Destinations
+import dev.hrach.navigation.results.NavigationResultEffect
 
+@SuppressLint("UnrememberedGetBackStackEntry")
 @Composable
 internal fun Home(
 	navController: NavController,
+) {
+	var bottomSheetResult by rememberSaveable { mutableIntStateOf(-1) }
+	NavigationResultEffect<Destinations.BottomSheet.Result>(
+		backStackEntry = remember(navController) { navController.getBackStackEntry<Destinations.Home>() },
+		navController = navController,
+	) { result ->
+		bottomSheetResult = result.id
+	}
+	Home(
+		navigate = navController::navigate,
+		bottomSheetResult = bottomSheetResult,
+	)
+}
+
+@Composable
+private fun Home(
+	navigate: (Any) -> Unit,
+	bottomSheetResult: Int,
 ) {
 	Column {
 		Text("Home")
 
-		OutlinedButton(onClick = { navController.navigate(Destinations.Modal1) }) {
+		OutlinedButton(onClick = { navigate(Destinations.Modal1) }) {
 			Text("Modal 1")
 		}
 
-		OutlinedButton(onClick = { navController.navigate(Destinations.BottomSheet) }) {
+		OutlinedButton(onClick = { navigate(Destinations.BottomSheet) }) {
 			Text("BottomSheet")
 		}
+
+		Text("BottomSheetResult: $bottomSheetResult")
 	}
 }

demo/src/main/kotlin/dev/hrach/navigation/demo/screens/Modal1.kt

@@ -1,5 +1,6 @@
 package dev.hrach.navigation.demo.screens
 
+import android.annotation.SuppressLint
 import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.WindowInsets
@@ -10,24 +11,50 @@ import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.saveable.rememberSaveable
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.navigation.NavController
 import dev.hrach.navigation.demo.Destinations
+import dev.hrach.navigation.results.NavigationResultEffect
 
+@SuppressLint("UnrememberedGetBackStackEntry")
 @Composable
 internal fun Modal1(navController: NavController) {
+	var bottomSheetResult by rememberSaveable { mutableIntStateOf(-1) }
+	NavigationResultEffect<Destinations.BottomSheet.Result>(
+		backStackEntry = remember(navController) { navController.getBackStackEntry<Destinations.Modal1>() },
+		navController = navController,
+	) { result ->
+		bottomSheetResult = result.id
+	}
+	Modal1(
+		navigate = navController::navigate,
+		bottomSheetResult = bottomSheetResult,
+	)
+}
+
+@Composable
+private fun Modal1(
+	navigate: (Any) -> Unit,
+	bottomSheetResult: Int,
+) {
 	Column(
 		Modifier
 			.fillMaxSize()
 			.background(MaterialTheme.colorScheme.surface)
 			.windowInsetsPadding(WindowInsets.systemBars),
 	) {
 		Text("Modal 1")
-		OutlinedButton(onClick = { navController.navigate(Destinations.Modal2) }) {
+		OutlinedButton(onClick = { navigate(Destinations.Modal2) }) {
 			Text("Modal 2")
 		}
-		OutlinedButton(onClick = { navController.navigate(Destinations.BottomSheet) }) {
+		OutlinedButton(onClick = { navigate(Destinations.BottomSheet) }) {
 			Text("BottomSheet")
 		}
+		Text("BottomSheetResult: $bottomSheetResult")
 	}
 }

gradle/libs.versions.toml

@@ -5,8 +5,10 @@ minSdk = "21"
 
 [libraries]
 
-kotlin-serialization = "org.jetbrains.kotlinx:kotlinx-serialization-core:1.6.3"
+kotlin-serialization-core = "org.jetbrains.kotlinx:kotlinx-serialization-core:1.6.3"
+kotlin-serialization-json = "org.jetbrains.kotlinx:kotlinx-serialization-json:1.6.3"
 appcompat = "androidx.appcompat:appcompat:1.6.1"
+androidx-lifecycle-runtime = "androidx.lifecycle:lifecycle-runtime:2.8.0"
 compose-material3 = "androidx.compose.material3:material3:1.3.0-beta01"
 navigation-compose = "androidx.navigation:navigation-compose:2.8.0-beta01"
 junit = { module = "junit:junit", version = "4.13.2" }

readme.md

@@ -12,13 +12,15 @@ Use Maven Central and these dependencies:
 dependencies {
 	implementation("dev.hrach.navigation:bottomsheet:<version>")
 	implementation("dev.hrach.navigation:modalsheet:<version>")
+	implementation("dev.hrach.navigation:results:<version>")
 }
 ```
 
 Components:
 
 - **BottomSheet** - Connects the official Material 3 BottomSheet with Jetpack Navigation.
 - **ModalSheet** - A custom destination type for Jetpack Navigation that brings fullscreen content with modal animation.
+- **Results** - Passing a result simply between destinations.
 
 Quick setup:
 
@@ -28,12 +30,44 @@ val bottomSheetNavigator = remember { BottomSheetNavigator() }
 val navController = rememberNavController(modalSheetNavigator, bottomSheetNavigator)
 
 NavHost(
-    navController = navController,
-    startDestination = Destinations.Home,
+	navController = navController,
+	startDestination = Destinations.Home,
 ) {
-    modalSheet<Destinations.Modal> { Modal1(navController) }
-    bottomSheet<Destinations.BottomSheet> { BottomSheet(navController) }
+	composable<Destinations.Home> { Home(navController) }
+	modalSheet<Destinations.Modal> { Modal(navController) }
+	bottomSheet<Destinations.BottomSheet> { BottomSheet(navController) }
 }
 ModalSheetHost(modalSheetNavigator)
 BottomSheetHost(bottomSheetNavigator)
 ```
+
+Results sharing:
+
+```kotlin
+object Destinations {
+	@Serializable
+	data object BottomSheet {
+		@Serializable
+		data class Result(
+			val id: Int,
+		)
+	}
+}
+
+@Composable
+fun Home(navController: NavController) {
+	NavigationResultEffect<Destinations.BottomSheet.Result>(
+		backStackEntry = remember(navController) { navController.getBackStackEntry<Destinations.Home>() },
+		navController = navController,
+	) { result ->
+		// process result -
+	}
+}
+
+@Composable
+fun BottomSheet(navController: NavController) {
+	OutlineButton(onClick = { navController.setResult(Destinations.BottomSheet.Result(42)) }) {
+		Text("Close")
+	}
+}
+```

results/.gitignore

@@ -0,0 +1 @@
+/build

results/build.gradle.kts

@@ -0,0 +1,61 @@
+@file:Suppress("UnstableApiUsage")
+
+plugins {
+	id("com.android.library")
+	id("org.jetbrains.kotlin.android")
+	id("org.jetbrains.kotlin.plugin.compose")
+	id("org.jetbrains.kotlinx.binary-compatibility-validator")
+	id("com.vanniktech.maven.publish")
+	id("com.gradleup.nmcp")
+	id("org.jmailen.kotlinter")
+}
+
+version = property("VERSION_NAME") as String
+
+android {
+	namespace = "dev.hrach.navigation.results"
+
+	compileSdk = libs.versions.compileSdk.get().toInt()
+
+	defaultConfig {
+		minSdk = libs.versions.minSdk.get().toInt()
+		testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+	}
+
+	buildFeatures {
+		compose = true
+		buildConfig = false
+	}
+
+	compileOptions {
+		sourceCompatibility = JavaVersion.VERSION_1_8
+		targetCompatibility = JavaVersion.VERSION_1_8
+	}
+
+	kotlinOptions {
+		freeCompilerArgs = freeCompilerArgs.toMutableList().apply {
+			add("-Xexplicit-api=strict")
+		}.toList()
+	}
+
+	lint {
+		disable.add("GradleDependency")
+		abortOnError = true
+		warningsAsErrors = true
+	}
+}
+
+nmcp {
+	publishAllPublications {}
+}
+
+kotlinter {
+	reporters = arrayOf("json")
+}
+
+dependencies {
+	implementation(libs.navigation.compose)
+	implementation(libs.kotlin.serialization.json)
+	implementation(libs.androidx.lifecycle.runtime)
+	testImplementation(libs.junit)
+}

results/gradle.properties

@@ -0,0 +1,4 @@
+POM_ARTIFACT_ID=results
+POM_NAME=Navigation Results sharing
+POM_DESCRIPTION=Results sharing between screens API for Jetpack Navigation Compose
+POM_PACKAGING=aar