Show stack trace in UI for vaults in error state

main/ui/src/main/java/org/cryptomator/ui/common/ErrorModule.java

@@ -21,10 +21,11 @@ abstract class ErrorModule {
 	static FXMLLoaderFactory provideFxmlLoaderFactory(Map<Class<? extends FxController>, Provider<FxController>> factories, DefaultSceneFactory sceneFactory, ResourceBundle resourceBundle) {
 		return new FXMLLoaderFactory(factories, sceneFactory, resourceBundle);
 	}
-	
+
 	@Provides
 	@Named("stackTrace")
 	static String provideStackTrace(Throwable cause) {
+		// TODO deduplicate VaultDetailUnknownErrorController.java
 		ByteArrayOutputStream baos = new ByteArrayOutputStream();
 		cause.printStackTrace(new PrintStream(baos));
 		return baos.toString(StandardCharsets.UTF_8);

main/ui/src/main/java/org/cryptomator/ui/mainwindow/MainWindowModule.java

@@ -6,13 +6,9 @@ import dagger.Provides;
 import dagger.multibindings.IntoMap;
 import javafx.scene.Scene;
 import javafx.scene.image.Image;
-import javafx.scene.input.KeyCode;
-import javafx.scene.input.KeyCodeCombination;
-import javafx.scene.input.KeyCombination;
 import javafx.stage.Stage;
 import javafx.stage.StageStyle;
 import org.cryptomator.ui.addvaultwizard.AddVaultWizardComponent;
-import org.cryptomator.ui.common.DefaultSceneFactory;
 import org.cryptomator.ui.common.FXMLLoaderFactory;
 import org.cryptomator.ui.common.FxController;
 import org.cryptomator.ui.common.FxControllerKey;
@@ -87,7 +83,7 @@ abstract class MainWindowModule {
 	@IntoMap
 	@FxControllerKey(VaultDetailController.class)
 	abstract FxController bindVaultDetailController(VaultDetailController controller);
-	
+
 	@Binds
 	@IntoMap
 	@FxControllerKey(WelcomeController.class)
@@ -102,7 +98,7 @@ abstract class MainWindowModule {
 	@IntoMap
 	@FxControllerKey(VaultDetailUnlockedController.class)
 	abstract FxController bindVaultDetailUnlockedController(VaultDetailUnlockedController controller);
-	
+
 	@Binds
 	@IntoMap
 	@FxControllerKey(VaultDetailMissingVaultController.class)
@@ -113,11 +109,15 @@ abstract class MainWindowModule {
 	@FxControllerKey(VaultDetailNeedsMigrationController.class)
 	abstract FxController bindVaultDetailNeedsMigrationController(VaultDetailNeedsMigrationController controller);
 
+	@Binds
+	@IntoMap
+	@FxControllerKey(VaultDetailUnknownErrorController.class)
+	abstract FxController bindVaultDetailUnknownErrorController(VaultDetailUnknownErrorController controller);
+
 	@Binds
 	@IntoMap
 	@FxControllerKey(VaultListCellController.class)
 	abstract FxController bindVaultListCellController(VaultListCellController controller);
 
 
-
 }

main/ui/src/main/java/org/cryptomator/ui/mainwindow/VaultDetailUnknownErrorController.java

@@ -0,0 +1,40 @@
+package org.cryptomator.ui.mainwindow;
+
+import javafx.beans.binding.Binding;
+import javafx.beans.property.ObjectProperty;
+import org.cryptomator.common.vaults.Vault;
+import org.cryptomator.ui.common.FxController;
+import org.fxmisc.easybind.EasyBind;
+
+import javax.inject.Inject;
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+import java.nio.charset.StandardCharsets;
+
+@MainWindowScoped
+public class VaultDetailUnknownErrorController implements FxController {
+
+	private final Binding<String> stackTrace;
+
+	@Inject
+	public VaultDetailUnknownErrorController(ObjectProperty<Vault> vault) {
+		this.stackTrace = EasyBind.select(vault).selectObject(Vault::lastKnownExceptionProperty).map(this::provideStackTrace).orElse("");
+	}
+
+	private String provideStackTrace(Throwable cause) {
+		// TODO deduplicate ErrorModule.java
+		ByteArrayOutputStream baos = new ByteArrayOutputStream();
+		cause.printStackTrace(new PrintStream(baos));
+		return baos.toString(StandardCharsets.UTF_8);
+	}
+
+	/* Getter/Setter */
+
+	public Binding<String> stackTraceProperty() {
+		return stackTrace;
+	}
+
+	public String getStackTrace() {
+		return stackTrace.getValue();
+	}
+}

main/ui/src/main/java/org/cryptomator/ui/mainwindow/VaultListController.java

@@ -18,6 +18,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import javax.inject.Inject;
+import java.io.IOException;
 
 @MainWindowScoped
 public class VaultListController implements FxController {
@@ -68,8 +69,14 @@ public class VaultListController implements FxController {
 			case LOCKED:
 			case NEEDS_MIGRATION:
 			case MISSING:
-				VaultState determinedState = VaultListManager.determineVaultState(newValue.getPath());
-				newValue.setState(determinedState);
+				try {
+					VaultState determinedState = VaultListManager.determineVaultState(newValue.getPath());
+					newValue.setState(determinedState);
+				} catch (IOException e) {
+					LOG.warn("Failed to determine vault state for " + newValue.getPath(), e);
+					newValue.setState(VaultState.ERROR);
+					newValue.setLastKnownException(e);
+				}
 				break;
 			case ERROR:
 			case UNLOCKED:

main/ui/src/main/resources/fxml/vault_detail.fxml

@@ -52,5 +52,6 @@
 		<fx:include VBox.vgrow="ALWAYS" source="vault_detail_unlocked.fxml" visible="${controller.vault.unlocked}" managed="${controller.vault.unlocked}"/>
 		<fx:include VBox.vgrow="ALWAYS" source="vault_detail_missing.fxml" visible="${controller.vault.missing}" managed="${controller.vault.missing}"/>
 		<fx:include VBox.vgrow="ALWAYS" source="vault_detail_needsmigration.fxml" visible="${controller.vault.needsMigration}" managed="${controller.vault.needsMigration}"/>
+		<fx:include VBox.vgrow="ALWAYS" source="vault_detail_unknownerror.fxml" visible="${controller.vault.unknownError}" managed="${controller.vault.unknownError}"/>
 	</children>
 </VBox>

main/ui/src/main/resources/fxml/vault_detail_unknownerror.fxml

@@ -0,0 +1,15 @@
+<?import javafx.scene.control.Label?>
+<?import javafx.scene.control.TextArea?>
+<?import javafx.scene.layout.VBox?>
+<VBox xmlns="http://javafx.com/javafx"
+	  xmlns:fx="http://javafx.com/fxml"
+	  fx:controller="org.cryptomator.ui.mainwindow.VaultDetailUnknownErrorController"
+	  alignment="CENTER"
+	  spacing="24">
+	<children>
+		<Label text="%generic.error.title" wrapText="true"/>
+		<Label text="%generic.error.instruction" wrapText="true"/>
+
+		<TextArea VBox.vgrow="ALWAYS" text="${controller.stackTrace}" prefRowCount="5" editable="false"/>
+	</children>
+</VBox>