Implements #1182 By adding a button to forget the saved password

main/ui/src/main/java/org/cryptomator/ui/controls/FontAwesome5Icon.java

@@ -26,6 +26,7 @@ public enum FontAwesome5Icon {
 	INFO_CIRCLE("\uF05A"), //
 	KEY("\uF084"), //
 	LINK("\uF0C1"), //
+	UNLINK("\uf127"),
 	LOCK("\uF023"), //
 	LOCK_OPEN("\uF3C1"), //
 	MAGIC("\uF0D0"), //

main/ui/src/main/java/org/cryptomator/ui/vaultoptions/MasterkeyOptionsController.java

@@ -1,13 +1,19 @@
 package org.cryptomator.ui.vaultoptions;
 
+import javafx.beans.binding.Bindings;
+import javafx.beans.binding.BooleanExpression;
+import javafx.beans.property.SimpleBooleanProperty;
 import javafx.fxml.FXML;
 import javafx.stage.Stage;
 import org.cryptomator.common.vaults.Vault;
+import org.cryptomator.keychain.KeychainAccessException;
+import org.cryptomator.keychain.KeychainManager;
 import org.cryptomator.ui.changepassword.ChangePasswordComponent;
 import org.cryptomator.ui.common.FxController;
 import org.cryptomator.ui.recoverykey.RecoveryKeyComponent;
 
 import javax.inject.Inject;
+import java.util.Optional;
 
 @VaultOptionsScoped
 public class MasterkeyOptionsController implements FxController {
@@ -16,13 +22,20 @@ public class MasterkeyOptionsController implements FxController {
 	private final Stage window;
 	private final ChangePasswordComponent.Builder changePasswordWindow;
 	private final RecoveryKeyComponent.Builder recoveryKeyWindow;
+	private final Optional<KeychainManager> keychainManagerOptional;
+	private final BooleanExpression passwordSaved;
+
 
 	@Inject
-	MasterkeyOptionsController(@VaultOptionsWindow Vault vault, @VaultOptionsWindow Stage window, ChangePasswordComponent.Builder changePasswordWindow, RecoveryKeyComponent.Builder recoveryKeyWindow) {
+	MasterkeyOptionsController(@VaultOptionsWindow Vault vault, @VaultOptionsWindow Stage window, ChangePasswordComponent.Builder changePasswordWindow, RecoveryKeyComponent.Builder recoveryKeyWindow, Optional<KeychainManager> keychainManagerOptional) {
 		this.vault = vault;
 		this.window = window;
 		this.changePasswordWindow = changePasswordWindow;
 		this.recoveryKeyWindow = recoveryKeyWindow;
+		this.keychainManagerOptional = keychainManagerOptional;
+		if (keychainManagerOptional.isPresent()) {
+			this.passwordSaved = Bindings.createBooleanBinding(this::isPasswordSaved, keychainManagerOptional.get().getPassphraseStoredProperty(vault.getId()));
+		} else this.passwordSaved = new SimpleBooleanProperty(false);
 	}
 
 	@FXML
@@ -39,4 +52,20 @@ public class MasterkeyOptionsController implements FxController {
 	public void showRecoverVaultDialogue() {
 		recoveryKeyWindow.vault(vault).owner(window).build().showRecoveryKeyRecoverWindow();
 	}
+
+	@FXML
+	public void removePasswordFromKeychain() throws KeychainAccessException {
+		keychainManagerOptional.get().deletePassphrase(vault.getId());
+		window.close();
+	}
+
+	public BooleanExpression passwordSavedProperty() {
+		return passwordSaved;
+	}
+
+	public boolean isPasswordSaved() {
+		if (keychainManagerOptional.isPresent() && vault != null) {
+			return keychainManagerOptional.get().getPassphraseStoredProperty(vault.getId()).get();
+		} else return false;
+	}
 }

main/ui/src/main/resources/fxml/vault_options_masterkey.fxml

@@ -16,14 +16,20 @@
 		<Insets topRightBottomLeft="12"/>
 	</padding>
 	<children>
-		<Button text="%vaultOptions.masterkey.changePasswordBtn" onAction="#changePassword" contentDisplay="LEFT">
-			<graphic>
-				<FontAwesome5IconView glyph="KEY"/>
-			</graphic>
-		</Button>
-		
+		<HBox spacing="6" alignment="CENTER">
+			<Button text="%vaultOptions.masterkey.changePasswordBtn" onAction="#changePassword" contentDisplay="LEFT">
+				<graphic>
+					<FontAwesome5IconView glyph="KEY"/>
+				</graphic>
+			</Button>
+			<Button text="%vaultOptions.masterkey.forgetSavedPasswordBtn" onAction="#removePasswordFromKeychain" contentDisplay="LEFT" visible="${controller.passwordSaved}" managed="${controller.passwordSaved}">
+				<graphic>
+					<FontAwesome5IconView glyph="UNLINK"/>
+				</graphic>
+			</Button>
+		</HBox>
 		<Region VBox.vgrow="ALWAYS"/>
-		
+
 		<Label maxWidth="-Infinity" text="%vaultOptions.masterkey.recoveryKeyExpanation" wrapText="true"/>
 		<HBox spacing="6" alignment="CENTER">
 			<Button text="%vaultOptions.masterkey.showRecoveryKeyBtn" onAction="#showRecoveryKey" contentDisplay="LEFT">

main/ui/src/main/resources/i18n/strings.properties

@@ -229,6 +229,7 @@ vaultOptions.mount.mountPoint.directoryPickerTitle=Pick an empty directory
 ## Master Key
 vaultOptions.masterkey=Password
 vaultOptions.masterkey.changePasswordBtn=Change Password
+vaultOptions.masterkey.forgetSavedPasswordBtn=Forget saved Password
 vaultOptions.masterkey.recoveryKeyExpanation=A recovery key is your only means to restore access to a vault if you lose your password.
 vaultOptions.masterkey.showRecoveryKeyBtn=Display Recovery Key
 vaultOptions.masterkey.recoverPasswordBtn=Recover Password