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package soup.gdg.navigation.sample.navigation |
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import android.content.Context |
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import android.os.Bundle |
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import android.util.AttributeSet |
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import android.util.Log |
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import androidx.annotation.CallSuper |
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import androidx.annotation.IdRes |
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import androidx.fragment.app.DialogFragment |
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import androidx.fragment.app.Fragment |
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import androidx.fragment.app.FragmentManager |
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import androidx.navigation.NavDestination |
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import androidx.navigation.NavOptions |
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import androidx.navigation.Navigator |
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import androidx.navigation.NavigatorProvider |
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import androidx.navigation.fragment.FragmentNavigator |
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import androidx.navigation.fragment.R |
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@Navigator.Name("dialog_fragment") |
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class DialogFragmentNavigator( |
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private val context: Context, |
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private val fragmentManager: FragmentManager |
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) : Navigator<DialogFragmentNavigator.Destination>() { |
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companion object { |
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private const val TAG = "DialogFragmentNavigator" |
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} |
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override fun navigate( |
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destination: Destination, |
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args: Bundle?, |
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navOptions: NavOptions?, |
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navigatorExtras: Extras? |
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): NavDestination? { |
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if (fragmentManager.isStateSaved) { |
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Log.i(TAG, "Ignoring navigate() call: FragmentManager has already saved its state") |
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return null |
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} |
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var className = destination.getClassName() |
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if (className[0] == '.') { |
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className = context.packageName + className |
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} |
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val frag = instantiateDialogFragment(context, fragmentManager, className) |
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frag.arguments = args |
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@IdRes val destId = destination.id |
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frag.setTargetFragment( |
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fragmentManager.primaryNavigationFragment, |
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destId /* requestCode */ |
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) |
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frag.show(fragmentManager, "dialog-$destId") |
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return null |
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} |
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private fun instantiateDialogFragment( |
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context: Context, |
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fragmentManager: FragmentManager, |
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className: String |
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): DialogFragment { |
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return fragmentManager.fragmentFactory.instantiate(context.classLoader, className) |
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as DialogFragment |
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} |
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override fun createDestination(): Destination { |
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return Destination(this) |
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} |
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override fun popBackStack(): Boolean { |
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return true |
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} |
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@NavDestination.ClassType(Fragment::class) |
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class Destination : NavDestination { |
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private var className: String? = null |
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constructor(navigatorProvider: NavigatorProvider) : |
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super(navigatorProvider.getNavigator(FragmentNavigator::class.java)) |
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constructor(fragmentNavigator: Navigator<out Destination>) : |
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super(fragmentNavigator) |
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@CallSuper |
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override fun onInflate(context: Context, attrs: AttributeSet) { |
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super.onInflate(context, attrs) |
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val a = context.resources.obtainAttributes(attrs, R.styleable.FragmentNavigator) |
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val className = a.getString(R.styleable.FragmentNavigator_android_name) |
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if (className != null) { |
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setClassName(className) |
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} |
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a.recycle() |
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} |
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fun setClassName(className: String): Destination { |
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this.className = className |
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return this |
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} |
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fun getClassName(): String { |
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return className ?: throw IllegalStateException("Fragment class was not set") |
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} |
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} |
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} |
