Replaced xml navigation with self-handled

app/build.gradle

@@ -1,6 +1,6 @@
 apply plugin: 'com.android.application'
-apply plugin: 'kotlin-android-extensions'
 apply plugin: 'kotlin-android'
+apply plugin: 'kotlin-android-extensions'
 apply plugin: 'kotlin-kapt'
 
 kapt {
@@ -80,4 +80,7 @@ dependencies {
         exclude group: 'androidx.work', module: 'work-runtime-ktx'
         exclude group: 'androidx.room', module: 'room-runtime'
     }
+
+    def navigation = "3.2.0"
+    implementation "com.ncapdevi:frag-nav:${navigation}"
 }

app/src/main/java/com/topjohnwu/magisk/model/navigation/MagiskNavigationEvent.kt

@@ -0,0 +1,82 @@
+package com.topjohnwu.magisk.model.navigation
+
+import android.os.Bundle
+import androidx.annotation.AnimRes
+import androidx.annotation.AnimatorRes
+import androidx.fragment.app.Fragment
+import com.skoumal.teanity.viewevents.NavigationDslMarker
+import com.skoumal.teanity.viewevents.ViewEvent
+import kotlin.reflect.KClass
+
+class MagiskNavigationEvent(
+    val navDirections: MagiskNavDirectionsBuilder,
+    val navOptions: MagiskNavOptions,
+    val animOptions: MagiskAnimBuilder
+) : ViewEvent() {
+
+    companion object {
+        operator fun invoke(builder: Builder.() -> Unit) = Builder().apply(builder).build()
+    }
+
+    @NavigationDslMarker
+    class Builder {
+
+        private var animOptions: MagiskAnimBuilder = MagiskAnimBuilder()
+        private var navOptions: MagiskNavOptions = MagiskNavOptions()
+        private val directionsBuilder = MagiskNavDirectionsBuilder()
+
+        fun args(builder: Bundle.() -> Unit) = directionsBuilder.args(builder)
+
+        fun navAnim(builder: MagiskAnimBuilder.() -> Unit) {
+            animOptions = MagiskAnimBuilder().apply(builder)
+        }
+
+        fun navOptions(builder: MagiskNavOptions.() -> Unit) {
+            navOptions = MagiskNavOptions().apply(builder)
+        }
+
+        fun navDirections(builder: MagiskNavDirectionsBuilder.() -> Unit) {
+            directionsBuilder.apply(builder)
+        }
+
+        internal fun build() = MagiskNavigationEvent(directionsBuilder, navOptions, animOptions)
+    }
+}
+
+@NavigationDslMarker
+class MagiskNavDirectionsBuilder {
+
+    var destination: KClass<out Fragment>? = null
+    var isActivity: Boolean = false
+    val args: Bundle = Bundle()
+
+    fun args(builder: Bundle.() -> Unit) = args.apply(builder)
+
+}
+
+@NavigationDslMarker
+class MagiskNavOptions {
+    var popUpTo: KClass<*>? = null
+    var inclusive: Boolean = false
+    var clearTask: Boolean = false
+    var singleTop: Boolean = false
+}
+
+@NavigationDslMarker
+class MagiskAnimBuilder {
+    @AnimRes
+    @AnimatorRes
+    var enter = 0
+
+    @AnimRes
+    @AnimatorRes
+    var exit = 0
+
+    @AnimRes
+    @AnimatorRes
+    var popEnter = 0
+
+    @AnimRes
+    @AnimatorRes
+    var popExit = 0
+}

app/src/main/java/com/topjohnwu/magisk/model/navigation/Navigation.kt

@@ -1,34 +1,43 @@
 package com.topjohnwu.magisk.model.navigation
 
-import com.skoumal.teanity.viewevents.NavigationEvent
-import com.topjohnwu.magisk.R
+import com.topjohnwu.magisk.ui.hide.MagiskHideFragment
+import com.topjohnwu.magisk.ui.home.MagiskFragment
+import com.topjohnwu.magisk.ui.log.LogFragment
+import com.topjohnwu.magisk.ui.module.ModulesFragment
+import com.topjohnwu.magisk.ui.module.ReposFragment
+import com.topjohnwu.magisk.ui.settings.SettingsFragment
+import com.topjohnwu.magisk.ui.superuser.SuperuserFragment
 
 
 object Navigation {
 
-    fun home() = NavigationEvent {
-        navDirections { destination = R.id.magiskFragment }
-        navOptions { popUpTo = R.id.magiskFragment }
+    fun home() = MagiskNavigationEvent {
+        navDirections { destination = MagiskFragment::class }
+        navOptions { popUpTo = MagiskFragment::class }
     }
 
-    fun superuser() = NavigationEvent {
-        navDirections { destination = R.id.superuserFragment }
+    fun superuser() = MagiskNavigationEvent {
+        navDirections { destination = SuperuserFragment::class }
     }
 
-    fun modules() = NavigationEvent {
-        navDirections { destination = R.id.modulesFragment }
+    fun modules() = MagiskNavigationEvent {
+        navDirections { destination = ModulesFragment::class }
     }
 
-    fun repos() = NavigationEvent {
-        navDirections { destination = R.id.reposFragment }
+    fun repos() = MagiskNavigationEvent {
+        navDirections { destination = ReposFragment::class }
     }
 
-    fun hide() = NavigationEvent {
-        navDirections { destination = R.id.magiskHideFragment }
+    fun hide() = MagiskNavigationEvent {
+        navDirections { destination = MagiskHideFragment::class }
     }
 
-    fun log() = NavigationEvent {
-        navDirections { destination = R.id.logFragment }
+    fun log() = MagiskNavigationEvent {
+        navDirections { destination = LogFragment::class }
+    }
+
+    fun settings() = MagiskNavigationEvent {
+        navDirections { destination = SettingsFragment::class }
     }
 
 

app/src/main/java/com/topjohnwu/magisk/model/navigation/Navigator.kt

@@ -0,0 +1,13 @@
+package com.topjohnwu.magisk.model.navigation
+
+import androidx.fragment.app.Fragment
+import kotlin.reflect.KClass
+
+interface Navigator {
+
+    //TODO Elevate Fragment to MagiskFragment<*,*> once everything is on board with it
+    val baseFragments: List<KClass<out Fragment>>
+
+    fun navigateTo(event: MagiskNavigationEvent)
+
+}

app/src/main/java/com/topjohnwu/magisk/ui/MainActivity.kt

@@ -3,23 +3,42 @@ package com.topjohnwu.magisk.ui
 import android.content.Intent
 import android.os.Bundle
 import androidx.core.view.GravityCompat
-import androidx.navigation.ui.setupWithNavController
+import androidx.fragment.app.Fragment
 import com.topjohnwu.magisk.ClassMap
 import com.topjohnwu.magisk.Config
 import com.topjohnwu.magisk.R
 import com.topjohnwu.magisk.databinding.ActivityMainBinding
 import com.topjohnwu.magisk.model.navigation.Navigation
 import com.topjohnwu.magisk.ui.base.MagiskActivity
+import com.topjohnwu.magisk.ui.hide.MagiskHideFragment
+import com.topjohnwu.magisk.ui.log.LogFragment
+import com.topjohnwu.magisk.ui.module.ModulesFragment
+import com.topjohnwu.magisk.ui.module.ReposFragment
+import com.topjohnwu.magisk.ui.settings.SettingsFragment
+import com.topjohnwu.magisk.ui.superuser.SuperuserFragment
 import com.topjohnwu.magisk.utils.Utils
 import com.topjohnwu.net.Networking
 import com.topjohnwu.superuser.Shell
 import org.koin.androidx.viewmodel.ext.android.viewModel
+import kotlin.reflect.KClass
+import com.topjohnwu.magisk.ui.home.MagiskFragment as HomeFragment
 
 open class MainActivity : MagiskActivity<MainViewModel, ActivityMainBinding>() {
 
     override val layoutRes: Int = R.layout.activity_main
     override val viewModel: MainViewModel by viewModel()
     override val navHostId: Int = R.id.main_nav_host
+    override val defaultPosition: Int = 0
+
+    override val baseFragments: List<KClass<out Fragment>> = listOf(
+        HomeFragment::class,
+        SuperuserFragment::class,
+        MagiskHideFragment::class,
+        ModulesFragment::class,
+        ReposFragment::class,
+        LogFragment::class,
+        SettingsFragment::class
+    )
 
     /*override fun getDarkTheme(): Int {
         return R.style.AppTheme_Dark
@@ -35,7 +54,6 @@ open class MainActivity : MagiskActivity<MainViewModel, ActivityMainBinding>() {
         checkHideSection()
         setSupportActionBar(binding.mainInclude.mainToolbar)
 
-        binding.navView.setupWithNavController(navController)
     }
 
     override fun onBackPressed() {

app/src/main/java/com/topjohnwu/magisk/ui/MainViewModel.kt

@@ -1,5 +1,7 @@
 package com.topjohnwu.magisk.ui
 
+import android.view.MenuItem
+import com.topjohnwu.magisk.R
 import com.topjohnwu.magisk.model.navigation.Navigation
 import com.topjohnwu.magisk.ui.base.MagiskViewModel
 
@@ -8,4 +10,18 @@ class MainViewModel : MagiskViewModel() {
 
     fun navPressed() = Navigation.Main.OPEN_NAV.publish()
 
+    fun navigationItemPressed(item: MenuItem): Boolean {
+        when (item.itemId) {
+            R.id.magiskFragment -> Navigation.home()
+            R.id.superuserFragment -> Navigation.superuser()
+            R.id.magiskHideFragment -> Navigation.hide()
+            R.id.modulesFragment -> Navigation.modules()
+            R.id.reposFragment -> Navigation.repos()
+            R.id.logFragment -> Navigation.log()
+            R.id.settings -> Navigation.settings()
+            else -> null
+        }?.publish()?.let { return@navigationItemPressed true }
+        return false
+    }
+
 }

app/src/main/java/com/topjohnwu/magisk/ui/base/MagiskActivity.kt

@@ -1,13 +1,126 @@
 package com.topjohnwu.magisk.ui.base
 
+import android.content.Intent
+import android.os.Bundle
+import androidx.annotation.CallSuper
 import androidx.core.net.toUri
 import androidx.databinding.ViewDataBinding
+import androidx.fragment.app.Fragment
+import com.ncapdevi.fragnav.FragNavController
+import com.ncapdevi.fragnav.FragNavTransactionOptions
+import com.skoumal.teanity.viewevents.ViewEvent
+import com.topjohnwu.magisk.model.navigation.MagiskAnimBuilder
+import com.topjohnwu.magisk.model.navigation.MagiskNavigationEvent
+import com.topjohnwu.magisk.model.navigation.Navigator
 import com.topjohnwu.magisk.utils.Utils
+import timber.log.Timber
+import kotlin.reflect.KClass
 
 
 abstract class MagiskActivity<ViewModel : MagiskViewModel, Binding : ViewDataBinding> :
-    MagiskLeanbackActivity<ViewModel, Binding>() {
+    MagiskLeanbackActivity<ViewModel, Binding>(), FragNavController.RootFragmentListener,
+    Navigator {
+
+    override val numberOfRootFragments: Int get() = baseFragments.size
+    override val baseFragments: List<KClass<out Fragment>> = listOf()
+
+    protected open val defaultPosition: Int = 0
+
+    protected val navigationController by lazy {
+        if (navHostId == 0) throw IllegalStateException("Did you forget to override \"navHostId\"?")
+        FragNavController(supportFragmentManager, navHostId)
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        navigationController.apply {
+            rootFragmentListener = this@MagiskActivity
+            initialize(defaultPosition, savedInstanceState)
+        }
+    }
+
+    override fun onSaveInstanceState(outState: Bundle) {
+        super.onSaveInstanceState(outState)
+        navigationController.onSaveInstanceState(outState)
+    }
+
+    @CallSuper
+    override fun onEventDispatched(event: ViewEvent) {
+        super.onEventDispatched(event)
+        when (event) {
+            is MagiskNavigationEvent -> navigateTo(event)
+        }
+    }
+
+    override fun getRootFragment(index: Int) = baseFragments[index].java.newInstance()
+
+    override fun navigateTo(event: MagiskNavigationEvent) {
+        val directions = event.navDirections
+
+        navigationController.defaultTransactionOptions = FragNavTransactionOptions.newBuilder()
+            .customAnimations(event.animOptions)
+            .build()
+
+        navigationController.currentStack
+            ?.indexOfFirst { it.javaClass == event.navOptions.popUpTo }
+            ?.let { if (it == -1) null else it } // invalidate if class is not found
+            ?.let { if (event.navOptions.inclusive) it + 1 else it }
+            ?.let { navigationController.popFragments(it) }
+
+        when (directions.isActivity) {
+            true -> navigateToActivity(event)
+            else -> navigateToFragment(event)
+        }
+    }
+
+    private fun navigateToActivity(event: MagiskNavigationEvent) {
+        val destination = event.navDirections.destination?.java ?: let {
+            Timber.e("Cannot navigate to null destination")
+            return
+        }
+        val options = event.navOptions
+
+        Intent(this, destination)
+            .putExtras(event.navDirections.args)
+            .apply {
+                if (options.singleTop) addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP)
+                if (options.clearTask) addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK)
+            }
+            .let { startActivity(it) }
+    }
+
+    private fun navigateToFragment(event: MagiskNavigationEvent) {
+        val destination = event.navDirections.destination?.java ?: let {
+            Timber.e("Cannot navigate to null destination")
+            return
+        }
+
+        when (val index = baseFragments.indexOfFirst { it.java.name == destination.name }) {
+            -1 -> destination.newInstance()
+                .apply { arguments = event.navDirections.args }
+                .let { navigationController.pushFragment(it) }
+            // When it's desired that fragments of same class are put on top of one another edit this
+            else -> navigationController.switchTab(index)
+        }
+    }
+
+    override fun onBackPressed() {
+        val fragment = navigationController.currentFrag as? MagiskFragment<*, *>
+
+        if (fragment?.onBackPressed() == true) {
+            return
+        }
+
+        try {
+            navigationController.popFragment()
+        } catch (e: UnsupportedOperationException) {
+            super.onBackPressed()
+        }
+    }
 
     fun openUrl(url: String) = Utils.openLink(this, url.toUri())
 
+    private fun FragNavTransactionOptions.Builder.customAnimations(options: MagiskAnimBuilder) =
+        customAnimations(options.enter, options.exit, options.popEnter, options.popExit)
+
 }

app/src/main/java/com/topjohnwu/magisk/ui/base/MagiskFragment.kt

@@ -1,16 +1,35 @@
 package com.topjohnwu.magisk.ui.base
 
+import androidx.annotation.CallSuper
 import androidx.databinding.ViewDataBinding
+import androidx.fragment.app.Fragment
 import com.skoumal.teanity.view.TeanityFragment
+import com.skoumal.teanity.viewevents.ViewEvent
+import com.topjohnwu.magisk.model.navigation.MagiskNavigationEvent
+import com.topjohnwu.magisk.model.navigation.Navigator
+import kotlin.reflect.KClass
 
 
 abstract class MagiskFragment<ViewModel : MagiskViewModel, Binding : ViewDataBinding> :
-    TeanityFragment<ViewModel, Binding>() {
+    TeanityFragment<ViewModel, Binding>(), Navigator {
 
     protected val magiskActivity get() = activity as MagiskActivity<*, *>
 
-    fun openLink(url: String) {
-        magiskActivity.openUrl(url)
+    // We don't need nested fragments
+    override val baseFragments: List<KClass<Fragment>> = listOf()
+
+    override fun navigateTo(event: MagiskNavigationEvent) = magiskActivity.navigateTo(event)
+
+    @CallSuper
+    override fun onEventDispatched(event: ViewEvent) {
+        super.onEventDispatched(event)
+        when (event) {
+            is MagiskNavigationEvent -> navigateTo(event)
+        }
     }
 
+    fun openLink(url: String) = magiskActivity.openUrl(url)
+
+    open fun onBackPressed(): Boolean = false
+
 }

app/src/main/java/com/topjohnwu/magisk/utils/DataBindingAdapters.kt

@@ -6,6 +6,8 @@ import androidx.annotation.DrawableRes
 import androidx.appcompat.widget.AppCompatImageView
 import androidx.appcompat.widget.Toolbar
 import androidx.databinding.BindingAdapter
+import androidx.drawerlayout.widget.DrawerLayout
+import com.google.android.material.navigation.NavigationView
 
 
 @BindingAdapter("onNavigationClick")
@@ -13,6 +15,17 @@ fun setOnNavigationClickedListener(view: Toolbar, listener: View.OnClickListener
     view.setNavigationOnClickListener(listener)
 }
 
+@BindingAdapter("onNavigationClick")
+fun setOnNavigationClickedListener(
+    view: NavigationView,
+    listener: NavigationView.OnNavigationItemSelectedListener
+) {
+    view.setNavigationItemSelectedListener {
+        (view.parent as? DrawerLayout)?.closeDrawers()
+        listener.onNavigationItemSelected(it)
+    }
+}
+
 @BindingAdapter("srcCompat")
 fun setImageResource(view: AppCompatImageView, @DrawableRes resId: Int) {
     view.setImageResource(resId)

app/src/main/res/layout/activity_main.xml

@@ -29,6 +29,7 @@
             android:layout_height="match_parent"
             android:layout_gravity="start"
             android:fitsSystemWindows="true"
+            onNavigationClick="@{(item) -> viewModel.navigationItemPressed(item)}"
             app:menu="@menu/drawer" />
 
     </androidx.drawerlayout.widget.DrawerLayout>

app/src/main/res/layout/activity_main_content.xml

@@ -31,15 +31,12 @@
 
         </com.google.android.material.appbar.AppBarLayout>
 
-        <fragment
+        <FrameLayout
             android:id="@+id/main_nav_host"
-            android:name="androidx.navigation.fragment.NavHostFragment"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:background="?android:windowBackground"
-            app:defaultNavHost="true"
-            app:layout_behavior="@string/appbar_scrolling_view_behavior"
-            app:navGraph="@navigation/navigation_main" />
+            app:layout_behavior="@string/appbar_scrolling_view_behavior" />
 
     </androidx.coordinatorlayout.widget.CoordinatorLayout>
 

app/src/main/res/navigation/navigation_main.xml

@@ -1,39 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<navigation xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:id="@+id/navigation_main"
-    app:startDestination="@id/magiskFragment">
-
-    <fragment
-        android:id="@+id/magiskFragment"
-        android:name="com.topjohnwu.magisk.ui.home.MagiskFragment"
-        android:label="fragment_magisk"
-        tools:layout="@layout/fragment_magisk" />
-    <fragment
-        android:id="@+id/superuserFragment"
-        android:name="com.topjohnwu.magisk.ui.superuser.SuperuserFragment"
-        android:label="fragment_superuser"
-        tools:layout="@layout/fragment_superuser" />
-    <fragment
-        android:id="@+id/modulesFragment"
-        android:name="com.topjohnwu.magisk.ui.module.ModulesFragment"
-        android:label="fragment_modules"
-        tools:layout="@layout/fragment_modules" />
-    <fragment
-        android:id="@+id/reposFragment"
-        android:name="com.topjohnwu.magisk.ui.module.ReposFragment"
-        android:label="fragment_repos"
-        tools:layout="@layout/fragment_repos" />
-    <fragment
-        android:id="@+id/magiskHideFragment"
-        android:name="com.topjohnwu.magisk.ui.hide.MagiskHideFragment"
-        android:label="fragment_magisk_hide"
-        tools:layout="@layout/fragment_magisk_hide" />
-    <fragment
-        android:id="@+id/logFragment"
-        android:name="com.topjohnwu.magisk.ui.log.LogFragment"
-        android:label="fragment_log"
-        tools:layout="@layout/fragment_log" />
-
-</navigation>

build.gradle

@@ -17,7 +17,6 @@ buildscript {
         classpath 'com.android.tools:r8:1.4.79'
         classpath 'com.android.tools.build:gradle:3.3.2'
         classpath 'org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.30'
-        classpath 'androidx.navigation:navigation-safe-args-gradle-plugin:2.0.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files