// Copyright 2018-present the Material Components for iOS authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#import "MDCFlexibleHeaderView.h"

API_DEPRECATED_BEGIN("Use a branded UINavigationController instead.", ios(12, API_TO_BE_DEPRECATED))

@interface MDCFlexibleHeaderView ()

/*
 The view controller from which the top safe area insets should be extracted.

 This is typically the root parent of the view controller that owns the flexible header view
 controller.
 */
@property(nonatomic, weak, nullable) UIViewController *topSafeAreaSourceViewController;

/*
 Whether to subtract additionalSafeAreaInsets from the extracted safeAreaInsets.

 Ignored if topSafeAreaSourceViewController is nil.
 */
@property(nonatomic) BOOL subtractsAdditionalSafeAreaInsets;

/*
 A behavioral flag affecting whether the flexible header view should extract top safe area insets
 from topSafeAreaSourceViewController or not.
 */
@property(nonatomic) BOOL inferTopSafeAreaInsetFromViewController;

/*
 Forces an extraction of the top safe area inset. Intended to be called any time the top safe area
 inset is known to have changed.
 */
- (void)topSafeAreaInsetDidChange;

/**
 The height of the top safe area guide.
 */
@property(nonatomic, readonly) CGFloat topSafeAreaGuideHeight;

#pragma mark - WebKit compatibility

/**
 Returns YES if the trackingScrollView is a scroll view of a WKWebView instance.
 */
- (BOOL)trackingScrollViewIsWebKit;

/**
 See MDCFlexibleHeaderViewController.h for documentation on this flag.
 */
@property(nonatomic) BOOL useAdditionalSafeAreaInsetsForWebKitScrollViews;

@end

API_DEPRECATED_END
