Allow to add readonly manga directories

app/src/main/kotlin/org/koitharu/kotatsu/core/ui/BaseActivity.kt

@@ -98,6 +98,10 @@ abstract class BaseActivity<B : ViewBinding> :
 	}
 
 	override fun onSupportNavigateUp(): Boolean {
+		if (supportFragmentManager.backStackEntryCount > 0) {
+			supportFragmentManager.popBackStack()
+			return false
+		}
 		dispatchNavigateUp()
 		return true
 	}

app/src/main/kotlin/org/koitharu/kotatsu/settings/storage/MangaDirectorySelectDialog.kt

@@ -29,7 +29,7 @@ class MangaDirectorySelectDialog : AlertDialogFragment<DialogDirectorySelectBind
 	OnListItemClickListener<DirectoryModel> {
 
 	private val viewModel: MangaDirectorySelectViewModel by viewModels()
-	private val pickFileTreeLauncher = registerForActivityResult(ActivityResultContracts.OpenDocumentTree()) {
+	private val pickFileTreeLauncher = registerForActivityResult(PickDirectoryContract()) {
 		if (it != null) viewModel.onCustomDirectoryPicked(it)
 	}
 	private val permissionRequestLauncher = registerForActivityResult(

app/src/main/kotlin/org/koitharu/kotatsu/settings/storage/PickDirectoryContract.kt

@@ -0,0 +1,19 @@
+package org.koitharu.kotatsu.settings.storage
+
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import androidx.activity.result.contract.ActivityResultContracts
+
+class PickDirectoryContract : ActivityResultContracts.OpenDocumentTree() {
+
+	override fun createIntent(context: Context, input: Uri?): Intent {
+		val intent = super.createIntent(context, input)
+		intent.addFlags(
+			Intent.FLAG_GRANT_READ_URI_PERMISSION
+				or Intent.FLAG_GRANT_WRITE_URI_PERMISSION
+				or Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION,
+		)
+		return intent
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/settings/storage/directories/MangaDirectoriesActivity.kt

@@ -26,6 +26,7 @@ import org.koitharu.kotatsu.core.util.ext.tryLaunch
 import org.koitharu.kotatsu.databinding.ActivityMangaDirectoriesBinding
 import org.koitharu.kotatsu.settings.storage.DirectoryDiffCallback
 import org.koitharu.kotatsu.settings.storage.DirectoryModel
+import org.koitharu.kotatsu.settings.storage.PickDirectoryContract
 import org.koitharu.kotatsu.settings.storage.RequestStorageManagerPermissionContract
 
 @AndroidEntryPoint
@@ -33,7 +34,7 @@ class MangaDirectoriesActivity : BaseActivity<ActivityMangaDirectoriesBinding>()
 	OnListItemClickListener<DirectoryModel>, View.OnClickListener {
 
 	private val viewModel: MangaDirectoriesViewModel by viewModels()
-	private val pickFileTreeLauncher = registerForActivityResult(ActivityResultContracts.OpenDocumentTree()) {
+	private val pickFileTreeLauncher = registerForActivityResult(PickDirectoryContract()) {
 		if (it != null) viewModel.onCustomDirectoryPicked(it)
 	}
 	private val permissionRequestLauncher = registerForActivityResult(

app/src/main/kotlin/org/koitharu/kotatsu/settings/storage/directories/MangaDirectoriesViewModel.kt

@@ -37,7 +37,7 @@ class MangaDirectoriesViewModel @Inject constructor(
 			val dir = requireNotNull(storageManager.resolveUri(uri)) {
 				"Cannot resolve file name of \"$uri\""
 			}
-			if (!dir.canWrite()) {
+			if (!dir.canRead()) {
 				throw AccessDeniedException(dir)
 			}
 			if (dir !in storageManager.getApplicationStorageDirs()) {