changed password input to use block based api

MacPass/MPDocumentWindowController.m

@@ -323,7 +323,10 @@ typedef void (^MPPasswordChangedBlock)(BOOL didChangePassword);
     self.passwordInputController = [[MPPasswordInputController alloc] init];
   }
   [self _setContentViewController:self.passwordInputController];
-  [self.passwordInputController requestPassword];
+  __weak MPDocumentWindowController *welf = self;
+  [self.passwordInputController requestPassword:^BOOL(NSString *password, NSURL *keyURL, NSError *__autoreleasing *error) {
+    return [((MPDocument *)welf.document) unlockWithPassword:password keyFileURL:keyURL error:error];
+  }];
 }
 
 - (void)editPassword:(id)sender {

MacPass/MPPasswordInputController.h

@@ -8,8 +8,12 @@
 
 #import "MPViewController.h"
 
+@class KPKCompositeKey;
+
 @interface MPPasswordInputController : MPViewController
 
-- (void)requestPassword;
+typedef BOOL (^passwordInputCompletionBlock)(NSString *password, NSURL *keyURL, NSError *__autoreleasing*error);
+
+- (void)requestPassword:(passwordInputCompletionBlock)completionHandler;
 
 @end

MacPass/MPPasswordInputController.m

@@ -29,7 +29,7 @@
 
 @property (assign) BOOL showPassword;
 @property (nonatomic, assign) BOOL enablePassword;
-
+@property (copy) passwordInputCompletionBlock completionHandler;
 @end
 
 @implementation MPPasswordInputController
@@ -66,8 +66,8 @@
   return self.passwordTextField;
 }
 
-- (void)requestPassword {
-  // show warning if read-only mode!
+- (void)requestPassword:(passwordInputCompletionBlock)completionHandler {
+  self.completionHandler = completionHandler;
   [self _reset];
 }
 
@@ -87,15 +87,12 @@
 #pragma mark -
 #pragma mark Private
 - (IBAction)_decrypt:(id)sender {
-  /* reset show password */
-  MPDocument *document = self.windowController.document;
-  if(document) {
+
   NSError *error = nil;
   /* No password is different than an empty password */
   NSString *password = self.enablePassword ? self.passwordTextField.stringValue : nil;
-    if(![document unlockWithPassword:password
-                          keyFileURL:self.keyPathControl.URL
-                               error:&error]) {
+  if(self.completionHandler) {
+    if(!self.completionHandler(password, self.keyPathControl.URL, &error)) {
       [self _showError:error];
       [self.view.window shakeWindow:nil];
     }