Merge pull request #817 from Gregvh/feature/375-readonly

Unlock vault with readonly flag if requested (fixes #375)

main/ui/src/main/java/org/cryptomator/ui/model/Vault.java

@@ -21,6 +21,7 @@ import org.cryptomator.common.settings.Settings;
 import org.cryptomator.common.settings.VaultSettings;
 import org.cryptomator.cryptofs.CryptoFileSystem;
 import org.cryptomator.cryptofs.CryptoFileSystemProperties;
+import org.cryptomator.cryptofs.CryptoFileSystemProperties.FileSystemFlags;
 import org.cryptomator.cryptofs.CryptoFileSystemProvider;
 import org.cryptomator.cryptolib.api.CryptoException;
 import org.cryptomator.cryptolib.api.InvalidPassphraseException;
@@ -38,6 +39,8 @@ import java.nio.file.NoSuchFileException;
 import java.nio.file.NotDirectoryException;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.Objects;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.function.Predicate;
@@ -78,9 +81,13 @@ public class Vault {
 	}
 
 	private CryptoFileSystem unlockCryptoFileSystem(CharSequence passphrase) throws NoSuchFileException, IOException, InvalidPassphraseException, CryptoException {
+		List<FileSystemFlags> flags = new ArrayList<>();
+		if (vaultSettings.usesReadOnlyMode().get()) {
+			flags.add(FileSystemFlags.READONLY);
+		}
 		CryptoFileSystemProperties fsProps = CryptoFileSystemProperties.cryptoFileSystemProperties() //
 				.withPassphrase(passphrase) //
-				.withFlags() //
+				.withFlags(flags) //
 				.withMasterkeyFilename(MASTERKEY_FILENAME) //
 				.build();
 		return CryptoFileSystemProvider.newFileSystem(getPath(), fsProps);