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/*
* 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.navigation.dynamicfeatures.fragment
import android.content.Context
import android.util.AttributeSet
import androidx.core.content.withStyledAttributes
import androidx.fragment.app.FragmentManager
import androidx.navigation.NavBackStackEntry
import androidx.navigation.NavOptions
import androidx.navigation.Navigator
import androidx.navigation.NavigatorProvider
import androidx.navigation.dynamicfeatures.DynamicExtras
import androidx.navigation.dynamicfeatures.DynamicInstallManager
import androidx.navigation.fragment.FragmentNavigator
/**
* The [Navigator] that enables navigating to destinations within dynamic feature modules.
*/
@Navigator.Name("fragment")
public class DynamicFragmentNavigator(
context: Context,
manager: FragmentManager,
containerId: Int,
private val installManager: DynamicInstallManager
) : FragmentNavigator(context, manager, containerId) {
override fun createDestination(): Destination = Destination(this)
override fun navigate(
entries: List<NavBackStackEntry>,
navOptions: NavOptions?,
navigatorExtras: Navigator.Extras?
) {
for (entry in entries) {
navigate(entry, navOptions, navigatorExtras)
}
}
private fun navigate(
entry: NavBackStackEntry,
navOptions: NavOptions?,
navigatorExtras: Navigator.Extras?
) {
val destination = entry.destination
val extras = navigatorExtras as? DynamicExtras
if (destination is Destination) {
val moduleName = destination.moduleName
if (moduleName != null && installManager.needsInstall(moduleName)) {
installManager.performInstall(entry, extras, moduleName)
return
}
}
super.navigate(
listOf(entry),
navOptions,
if (extras != null) extras.destinationExtras else navigatorExtras
)
}
/**
* Destination for dynamic feature navigator.
*/
public class Destination : FragmentNavigator.Destination {
public var moduleName: String? = null
@Suppress("unused")
public constructor(navigatorProvider: NavigatorProvider) : super(navigatorProvider)
public constructor(
fragmentNavigator: Navigator<out FragmentNavigator.Destination>
) : super(fragmentNavigator)
override fun onInflate(context: Context, attrs: AttributeSet) {
super.onInflate(context, attrs)
context.withStyledAttributes(attrs, R.styleable.DynamicFragmentNavigator) {
moduleName = getString(R.styleable.DynamicFragmentNavigator_moduleName)
}
}
override fun equals(other: Any?): Boolean {
if (this === other) return true
if (other == null || other !is Destination) return false
return super.equals(other) && moduleName == other.moduleName
}
override fun hashCode(): Int {
var result = super.hashCode()
result = 31 * result + moduleName.hashCode()
return result
}
}
}