Hide prefetch option if not available

app/src/main/java/org/koitharu/kotatsu/settings/ContentSettingsFragment.kt

@@ -9,14 +9,13 @@ import androidx.preference.ListPreference
 import androidx.preference.Preference
 import com.google.android.material.snackbar.Snackbar
 import dagger.hilt.android.AndroidEntryPoint
-import java.io.File
-import javax.inject.Inject
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.base.ui.BasePreferenceFragment
 import org.koitharu.kotatsu.base.ui.dialog.StorageSelectDialog
+import org.koitharu.kotatsu.core.cache.ContentCache
 import org.koitharu.kotatsu.core.network.DoHProvider
 import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.local.data.LocalStorageManager
@@ -26,6 +25,8 @@ import org.koitharu.kotatsu.sync.ui.SyncSettingsIntent
 import org.koitharu.kotatsu.utils.ext.getStorageName
 import org.koitharu.kotatsu.utils.ext.setDefaultValueCompat
 import org.koitharu.kotatsu.utils.ext.viewLifecycleScope
+import java.io.File
+import javax.inject.Inject
 
 @AndroidEntryPoint
 class ContentSettingsFragment :
@@ -36,9 +37,12 @@ class ContentSettingsFragment :
 	@Inject
 	lateinit var storageManager: LocalStorageManager
 
+	@Inject
+	lateinit var contentCache: ContentCache
+
 	override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
 		addPreferencesFromResource(R.xml.pref_content)
-
+		findPreference<Preference>(AppSettings.KEY_PREFETCH_CONTENT)?.isVisible = contentCache.isCachingEnabled
 		findPreference<SliderPreference>(AppSettings.KEY_DOWNLOADS_PARALLELISM)?.run {
 			summary = value.toString()
 			setOnPreferenceChangeListener { preference, newValue ->
@@ -82,11 +86,13 @@ class ContentSettingsFragment :
 			AppSettings.KEY_LOCAL_STORAGE -> {
 				findPreference<Preference>(key)?.bindStorageName()
 			}
+
 			AppSettings.KEY_SUGGESTIONS -> {
 				findPreference<Preference>(AppSettings.KEY_SUGGESTIONS)?.setSummary(
 					if (settings.isSuggestionsEnabled) R.string.enabled else R.string.disabled,
 				)
 			}
+
 			AppSettings.KEY_SOURCES_HIDDEN -> {
 				bindRemoteSourcesSummary()
 			}
@@ -104,6 +110,7 @@ class ContentSettingsFragment :
 					.show()
 				true
 			}
+
 			AppSettings.KEY_SYNC -> {
 				val am = AccountManager.get(requireContext())
 				val accountType = getString(R.string.account_type_sync)
@@ -119,6 +126,7 @@ class ContentSettingsFragment :
 				}
 				true
 			}
+
 			else -> super.onPreferenceTreeClick(preference)
 		}
 	}

app/src/main/res/xml/pref_content.xml

@@ -1,7 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <PreferenceScreen
 	xmlns:android="http://schemas.android.com/apk/res/android"
-	xmlns:app="http://schemas.android.com/apk/res-auto">
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools">
 
 	<PreferenceScreen
 		android:fragment="org.koitharu.kotatsu.settings.sources.SourcesSettingsFragment"
@@ -25,7 +26,9 @@
 		android:entryValues="@array/values_network_policy"
 		android:key="prefetch_content"
 		android:title="@string/prefetch_content"
-		app:useSimpleSummaryProvider="true" />
+		app:isPreferenceVisible="false"
+		app:useSimpleSummaryProvider="true"
+		tools:isPreferenceVisible="true" />
 
 	<Preference
 		android:key="local_storage"