// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#import "ios/chrome/browser/ui/autofill/manual_fill/keyboard_observer_helper.h"

#if !defined(__has_feature) || !__has_feature(objc_arc)
#error "This file requires ARC support."
#endif

@interface KeyboardObserverHelper ()

// Boolean to check if the keyboard was actually dismissed.
@property(nonatomic) BOOL keyboardOnScreen;

@end

@implementation KeyboardObserverHelper

- (instancetype)init {
  self = [super init];
  if (self) {
    [[NSNotificationCenter defaultCenter]
        addObserver:self
           selector:@selector(keyboardWillShow:)
               name:UIKeyboardWillShowNotification
             object:nil];
    [[NSNotificationCenter defaultCenter]
        addObserver:self
           selector:@selector(keyboardWillHide:)
               name:UIKeyboardWillHideNotification
             object:nil];
    [[NSNotificationCenter defaultCenter]
        addObserver:self
           selector:@selector(keyboardDidHide:)
               name:UIKeyboardDidHideNotification
             object:nil];
  }
  return self;
}

- (void)keyboardWillShow:(NSNotification*)notification {
  self.keyboardOnScreen = YES;
}

- (void)keyboardWillHide:(NSNotification*)notification {
  self.keyboardOnScreen = NO;
  dispatch_async(dispatch_get_main_queue(), ^{
    if (self.keyboardOnScreen) {
      [self.delegate keyboardDidStayOnScreen];
    }
  });
}

- (void)keyboardDidHide:(NSNotification*)notification {
  dispatch_async(dispatch_get_main_queue(), ^{
    if (!self.keyboardOnScreen) {
      [self.delegate keyboardDidHide];
    }
  });
}

@end