Revert "Always enable predictive nav" (#616)

* Revert "Always enable predictive nav"

This reverts commit 0333a8c679.

* Disable predictive nav animations by default

app/src/main/kotlin/androidx/navigation/compose/NavHost.kt

@@ -29,6 +29,7 @@ import androidx.compose.animation.core.SeekableTransitionState
 import androidx.compose.animation.core.rememberTransition
 import androidx.compose.animation.core.snap
 import androidx.compose.animation.core.tween
+import androidx.compose.animation.core.updateTransition
 import androidx.compose.animation.fadeIn
 import androidx.compose.animation.fadeOut
 import androidx.compose.animation.togetherWith
@@ -55,6 +56,8 @@ import androidx.navigation.NavHostController
 import androidx.navigation.Navigator
 import androidx.navigation.createGraph
 import androidx.navigation.get
+import com.hippo.ehviewer.Settings
+import com.hippo.ehviewer.collectAsState
 import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.NonCancellable
 import kotlinx.coroutines.withContext
@@ -246,10 +249,15 @@ public fun NavHost(
     val zIndices = remember { mutableMapOf<String, Float>() }
 
     if (backStackEntry != null) {
+        val enablePredictiveBack by Settings.predictiveNavAnim.collectAsState()
         val transitionState = remember { SeekableTransitionState(backStackEntry) }
-        val transition = rememberTransition(transitionState, label = "entry")
+        val transition = if (enablePredictiveBack) {
-        LaunchedEffect(backStackEntry) {
+            LaunchedEffect(backStackEntry) {
-            transitionState.animateTo(backStackEntry)
+                transitionState.animateTo(backStackEntry)
+            }
+            rememberTransition(transitionState, label = "entry")
+        } else {
+            updateTransition(backStackEntry, label = "entry")
         }
 
         var inPredictiveBack by remember { mutableStateOf(false) }

app/src/main/kotlin/com/hippo/ehviewer/Settings.kt

@@ -109,6 +109,7 @@ object Settings : DataStorePreferences(null) {
     val listThumbSize = intPref("list_tile_size", 40)
     val languageFilter = intPref("language_filter", -1)
     val meteredNetworkWarning = boolPref("cellular_network_warning", false)
+    val predictiveNavAnim = boolPref("predictive_nav_anim_2", false)
     val blackDarkTheme = boolPref("black_dark_theme", false)
 
     var downloadScheme by stringOrNullPref("image_scheme", null)

app/src/main/kotlin/com/hippo/ehviewer/ui/settings/AdvancedScreen.kt

@@ -179,6 +179,10 @@ fun AdvancedScreen(navigator: DestinationsNavigator) {
                 title = stringResource(id = R.string.preload_thumb_aggressively),
                 value = Settings::preloadThumbAggressively,
             )
+            SwitchPreference(
+                title = stringResource(id = R.string.predictive_nav_anim),
+                value = Settings.predictiveNavAnim::value,
+            )
             IntSliderPreference(
                 maxValue = 5,
                 minValue = 1,

app/src/main/res/values-zh-rCN/strings.xml

@@ -508,6 +508,7 @@
     <string name="list_tile_thumb_size">详情模式下缩略图大小</string>
     <string name="account_name">账户</string>
     <string name="preload_thumb_aggressively">激进地预载缩略图</string>
+    <string name="predictive_nav_anim">[实验性] 预见式返回导航动画</string>
     <string name="auto_updates">自动检查更新</string>
     <string name="update_frequency_never">从不</string>
     <string name="update_frequency_daily">每天</string>

app/src/main/res/values/strings.xml

@@ -571,6 +571,7 @@
     <string name="list_tile_thumb_size">Thumb size in detail mode</string>
     <string name="account_name">Account</string>
     <string name="preload_thumb_aggressively">Preload thumbs aggressively</string>
+    <string name="predictive_nav_anim">[Experimental] Predictive back navigation animations</string>
     <string name="user_agent">User Agent</string>
     <string name="auto_updates">Automatically check for updates</string>
     <string name="update_frequency_never">Never</string>