Use CompositionLocalProvider provide local navController

app/src/main/java/com/hippo/ehviewer/ui/login/CookieSignInScreen.kt

@@ -45,7 +45,6 @@ import androidx.compose.ui.text.style.TextDecoration
 import androidx.compose.ui.text.withStyle
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
-import androidx.navigation.NavController
 import com.hippo.ehviewer.EhApplication
 import com.hippo.ehviewer.R
 import com.hippo.ehviewer.client.EhCookieStore
@@ -62,7 +61,8 @@ import okhttp3.Cookie
 import java.util.Locale
 
 @Composable
-fun CookieSignInScene(navController: NavController) {
+fun CookieSignInScene() {
+    val navController = LocalNavController.current
     val clipboardManager = LocalClipboardManager.current
     val focusManager = LocalFocusManager.current
     val snackbarHostState = remember { SnackbarHostState() }

app/src/main/java/com/hippo/ehviewer/ui/login/LoginActivity.kt

@@ -2,11 +2,14 @@ package com.hippo.ehviewer.ui.login
 
 import android.os.Bundle
 import androidx.activity.compose.setContent
+import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.SideEffect
+import androidx.compose.runtime.compositionLocalOf
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.navigation.ActivityNavigator
+import androidx.navigation.NavController
 import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
 import androidx.navigation.compose.rememberNavController
@@ -23,26 +26,28 @@ class LoginActivity : EhActivity() {
             Mdc3Theme {
                 val navController = rememberNavController()
 
-                NavHost(navController = navController, startDestination = SIGN_IN_ROUTE_NAME) {
-                    composable(SIGN_IN_ROUTE_NAME) {
-                        SignInScreen(navController)
-                    }
+                CompositionLocalProvider(LocalNavController provides navController) {
+                    NavHost(navController = navController, startDestination = SIGN_IN_ROUTE_NAME) {
+                        composable(SIGN_IN_ROUTE_NAME) {
+                            SignInScreen()
+                        }
 
-                    composable(WEBVIEW_SIGN_IN_ROUTE_NAME) {
-                        WebviewSignInScreen(navController)
-                    }
+                        composable(WEBVIEW_SIGN_IN_ROUTE_NAME) {
+                            WebviewSignInScreen()
+                        }
 
-                    composable(COOKIE_SIGN_IN_ROUTE_NAME) {
-                        CookieSignInScene(navController)
-                    }
+                        composable(COOKIE_SIGN_IN_ROUTE_NAME) {
+                            CookieSignInScene()
+                        }
 
-                    composable(SELECT_SITE_ROUTE_NAME) {
-                        val selectSite by remember { mutableStateOf(Settings.getSelectSite()) }
-                        if (selectSite) {
-                            SelectSiteScreen()
-                        } else {
-                            SideEffect {
-                                finish()
+                        composable(SELECT_SITE_ROUTE_NAME) {
+                            val selectSite by remember { mutableStateOf(Settings.getSelectSite()) }
+                            if (selectSite) {
+                                SelectSiteScreen()
+                            } else {
+                                SideEffect {
+                                    finish()
+                                }
                             }
                         }
                     }
@@ -82,6 +87,8 @@ suspend fun postLogin() {
     }
 }
 
+val LocalNavController = compositionLocalOf<NavController> { error("CompositionLocal LocalNavController not present!") }
+
 const val SIGN_IN_ROUTE_NAME = "SignIn"
 const val WEBVIEW_SIGN_IN_ROUTE_NAME = "WebViewSignIn"
 const val COOKIE_SIGN_IN_ROUTE_NAME = "CookieSignIn"

app/src/main/java/com/hippo/ehviewer/ui/login/SignInScreen.kt

@@ -50,7 +50,6 @@ import androidx.compose.ui.text.input.VisualTransformation
 import androidx.compose.ui.text.style.TextDecoration
 import androidx.compose.ui.text.withStyle
 import androidx.compose.ui.unit.dp
-import androidx.navigation.NavController
 import com.hippo.ehviewer.R
 import com.hippo.ehviewer.Settings
 import com.hippo.ehviewer.UrlOpener
@@ -65,7 +64,8 @@ import kotlinx.coroutines.Job
 import rikka.core.util.ContextUtils.requireActivity
 
 @Composable
-fun SignInScreen(navController: NavController) {
+fun SignInScreen() {
+    val navController = LocalNavController.current
     val coroutineScope = rememberCoroutineScope()
     val focusManager = LocalFocusManager.current
     var isProgressIndicatorVisible by rememberSaveable { mutableStateOf(false) }

app/src/main/java/com/hippo/ehviewer/ui/login/WebviewSignInScreen.kt

@@ -10,7 +10,6 @@ import androidx.compose.runtime.Composable
 import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.viewinterop.AndroidView
-import androidx.navigation.NavController
 import com.hippo.ehviewer.EhApplication
 import com.hippo.ehviewer.client.EhCookieStore
 import com.hippo.ehviewer.client.EhUrl
@@ -23,7 +22,8 @@ import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
 
 @SuppressLint("SetJavaScriptEnabled")
 @Composable
-fun WebviewSignInScreen(navController: NavController) {
+fun WebviewSignInScreen() {
+    val navController = LocalNavController.current
     val context = LocalContext.current
     val coroutineScope = rememberCoroutineScope()
     AndroidView(factory = {