Re-ask only on wrong password

TODO.md

@@ -8,6 +8,7 @@ Here's a list of features that it would be nice to have in DroidFS. As this is a
 
 ## UX
 - File associations editor
+- Optional file discovery before file operations
 - Modifiable CryFS scrypt parameters
 - Alert dialog showing details of file operations
 - Internal file browser to select volumes

app/src/main/java/sushi/hardcore/droidfs/VolumeOpener.kt

@@ -190,7 +190,9 @@ class VolumeOpener(
                     .setTitle(R.string.open_volume_failed)
                     .setMessage(getErrorMsg(result))
                     .setPositiveButton(R.string.ok) { _, _ ->
-                        askForPassword(volume, isVolumeSaved, callbacks, savePasswordHash)
+                        if (result.worthRetry) {
+                            askForPassword(volume, isVolumeSaved, callbacks, savePasswordHash)
+                        }
                     }
                     .show()
             } else {

app/src/main/java/sushi/hardcore/droidfs/file_operations/FileOperationService.kt

@@ -20,6 +20,8 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.MainScope
 import kotlinx.coroutines.async
+import kotlinx.coroutines.coroutineScope
+import kotlinx.coroutines.withContext
 import kotlinx.coroutines.yield
 import sushi.hardcore.droidfs.Constants
 import sushi.hardcore.droidfs.R
@@ -124,18 +126,20 @@ class FileOperationService : Service() {
 
     private suspend fun <T> waitForTask(notification: FileOperationNotification, task: Deferred<T>): TaskResult<out T> {
         tasks[notification.notificationId] = task
-        return serviceScope.async {
-            try {
-                TaskResult.completed(task.await())
-            } catch (e: CancellationException) {
-                TaskResult.cancelled()
-            } catch (e: Throwable) {
-                e.printStackTrace()
-                TaskResult.error(e.localizedMessage)
-            } finally {
-                cancelNotification(notification)
+        return coroutineScope {
+            withContext(serviceScope.coroutineContext) {
+                try {
+                    TaskResult.completed(task.await())
+                } catch (e: CancellationException) {
+                    TaskResult.cancelled()
+                } catch (e: Throwable) {
+                    e.printStackTrace()
+                    TaskResult.error(e.localizedMessage)
+                } finally {
+                    cancelNotification(notification)
+                }
             }
-        }.await()
+        }
     }
 
     private suspend fun <T> volumeTask(

app/src/main/java/sushi/hardcore/droidfs/filesystems/CryfsVolume.kt

@@ -68,7 +68,10 @@ class CryfsVolume(private val fusePtr: Long): EncryptedVolume() {
                 result.errorCode = errorCode.value ?: 0
                 result.errorStringId = when (errorCode.value) {
                     // Values from src/cryfs/impl/ErrorCodes.h
-                    11 -> R.string.wrong_password
+                    11 -> {
+                        result.worthRetry = true
+                        R.string.wrong_password
+                    }
                     16 -> R.string.inaccessible_base_dir
                     19 -> R.string.config_load_error
                     20 -> R.string.filesystem_id_changed

app/src/main/java/sushi/hardcore/droidfs/filesystems/EncryptedVolume.kt

@@ -8,7 +8,6 @@ import sushi.hardcore.droidfs.Constants
 import sushi.hardcore.droidfs.VolumeData
 import sushi.hardcore.droidfs.explorers.ExplorerElement
 import sushi.hardcore.droidfs.util.ObjRef
-import sushi.hardcore.droidfs.util.PathUtils
 import java.io.File
 import java.io.FileOutputStream
 import java.io.InputStream
@@ -16,13 +15,19 @@ import java.io.OutputStream
 
 abstract class EncryptedVolume: Parcelable {
 
-    class InitResult(val errorCode: Int, val errorStringId: Int, val volume: EncryptedVolume?) {
+    class InitResult(
+        val errorCode: Int,
+        val errorStringId: Int,
+        val worthRetry: Boolean,
+        val volume: EncryptedVolume?,
+    ) {
         class Builder {
             var errorCode = 0
             var errorStringId = 0
+            var worthRetry = false
             var volume: EncryptedVolume? = null
 
-            fun build() = InitResult(errorCode, errorStringId, volume)
+            fun build() = InitResult(errorCode, errorStringId, worthRetry, volume)
         }
     }
 

app/src/main/java/sushi/hardcore/droidfs/filesystems/GocryptfsVolume.kt

@@ -83,7 +83,10 @@ class GocryptfsVolume(private val sessionID: Int): EncryptedVolume() {
                 result.errorCode = sessionId
                 result.errorStringId = when (sessionId) {
                     -1 -> R.string.config_load_error
-                    -2 -> R.string.wrong_password
+                    -2 -> {
+                        result.worthRetry = true
+                        R.string.wrong_password
+                    }
                     else -> 0
                 }
             } else {