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#import "MWMSearchCategoriesManager.h"
#import "MWMSearchHistoryManager.h"
#import "MWMSearchTabbedCollectionViewCell.h"
#import "MWMSearchTabbedViewController.h"
#import "MWMSearchTabbedViewLayout.h"
#import "MWMSearchTabbedViewProtocol.h"
#import "UIKitCategories.h"
static NSString * const kCollectionCell = @"MWMSearchTabbedCollectionViewCell";
typedef NS_ENUM(NSInteger, MWMSearchTabbedViewCell)
{
MWMSearchTabbedViewCellHistory,
MWMSearchTabbedViewCellCategories,
MWMSearchTabbedViewCellCount
};
BOOL isOffsetInButton(CGFloat offset, MWMSearchTabButtonsView * button)
{
CGRect const frame = button.frame;
CGFloat const left = frame.origin.x;
CGFloat const right = left + frame.size.width;
return left <= offset && offset <= right;
}
@interface MWMSearchTabbedViewController () <UICollectionViewDataSource, UIScrollViewDelegate>
@property (weak, nonatomic) IBOutlet UICollectionView * tablesCollectionView;
@property (weak, nonatomic) MWMSearchTabButtonsView * selectedButton;
@property (nonatomic) MWMSearchHistoryManager * historyManager;
@property (nonatomic) MWMSearchCategoriesManager * categoriesManager;
@property (nonatomic) BOOL isRotating;
@end
@implementation MWMSearchTabbedViewController
- (instancetype)init
{
self = [super init];
if (self)
[self setupDataSources];
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
[self setupCollectionView];
self.selectedButtonTag = 0;
}
- (void)viewWillAppear:(BOOL)animated
{
[self.tablesCollectionView reloadData];
[self refreshScrollPosition];
[super viewWillAppear:animated];
}
#pragma mark - Layout
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
duration:(NSTimeInterval)duration
{
self.isRotating = YES;
[UIView animateWithDuration:duration animations:^
{
[self refreshScrollPosition];
}
completion:^(BOOL finished)
{
[self refreshScrollPosition];
self.isRotating = NO;
}];
}
- (void)viewWillTransitionToSize:(CGSize)size
withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator
{
self.isRotating = YES;
[coordinator animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext> context)
{
[self refreshScrollPosition];
}
completion:^(id<UIViewControllerTransitionCoordinatorContext> context)
{
self.isRotating = NO;
}];
}
#pragma mark - Setup
- (void)setupCollectionView
{
[self.tablesCollectionView registerNib:[UINib nibWithNibName:kCollectionCell bundle:nil]
forCellWithReuseIdentifier:kCollectionCell];
((MWMSearchTabbedViewLayout *)self.tablesCollectionView.collectionViewLayout).tablesCount =
MWMSearchTabbedViewCellCount;
}
- (void)setupDataSources
{
self.categoriesManager = [[MWMSearchCategoriesManager alloc] init];
self.historyManager = [[MWMSearchHistoryManager alloc] init];
}
- (void)tabButtonPressed:(MWMSearchTabButtonsView *)sender
{
dispatch_async(dispatch_get_main_queue(), ^
{
[self.tablesCollectionView
scrollToItemAtIndexPath:[NSIndexPath indexPathForItem:sender.tag inSection:0]
atScrollPosition:UICollectionViewScrollPositionCenteredHorizontally
animated:YES];
});
}
- (void)updateScrollPosition:(CGFloat)position
{
self.scrollIndicatorOffset.constant = nearbyint(position);
CGFloat const btnMid = position + 0.5 * self.scrollIndicator.width;
if (self.selectedButton && isOffsetInButton(btnMid, self.selectedButton))
return;
[self.tabButtons enumerateObjectsUsingBlock:^(MWMSearchTabButtonsView * btn, NSUInteger idx, BOOL *stop)
{
if (isOffsetInButton(btnMid, btn))
{
self.selectedButton = btn;
*stop = YES;
}
}];
}
- (void)refreshScrollPosition
{
self.scrollIndicatorOffset.constant = nearbyint(self.selectedButton.minX);
[self tabButtonPressed:self.selectedButton];
}
#pragma mark - UICollectionViewDataSource
- (NSInteger)collectionView:(nonnull UICollectionView *)collectionView
numberOfItemsInSection:(NSInteger)section
{
return MWMSearchTabbedViewCellCount;
}
- (nonnull UICollectionViewCell *)collectionView:(nonnull UICollectionView *)collectionView
cellForItemAtIndexPath:(nonnull NSIndexPath *)indexPath
{
MWMSearchTabbedCollectionViewCell * cell =
[collectionView dequeueReusableCellWithReuseIdentifier:kCollectionCell
forIndexPath:indexPath];
MWMSearchTabbedViewCell cellType = static_cast<MWMSearchTabbedViewCell>(indexPath.item);
switch (cellType)
{
case MWMSearchTabbedViewCellHistory:
[self.historyManager attachCell:cell];
break;
case MWMSearchTabbedViewCellCategories:
[self.categoriesManager attachCell:cell];
break;
default:
break;
}
return cell;
}
#pragma mark - UIScrollViewDelegate
- (void)scrollViewDidScroll:(nonnull UIScrollView *)scrollView
{
if (self.isRotating)
return;
CGFloat const scrollOffset = scrollView.contentOffset.x;
CGFloat const indWidth = self.scrollIndicator.width;
CGFloat const scrWidth = self.view.width;
[self updateScrollPosition:scrollOffset * indWidth / scrWidth];
}
#pragma mark - Properties
- (void)setSelectedButton:(MWMSearchTabButtonsView *)selectedButton
{
[self.tabButtons enumerateObjectsUsingBlock:^(MWMSearchTabButtonsView * btn, NSUInteger idx, BOOL *stop)
{
btn.selected = NO;
}];
_selectedButton = selectedButton;
selectedButton.selected = YES;
}
- (void)setDelegate:(id<MWMSearchTabbedViewProtocol>)delegate
{
_delegate = self.categoriesManager.delegate = self.historyManager.delegate = delegate;
}
- (void)setSelectedButtonTag:(NSInteger)selectedButtonTag
{
[self.tabButtons enumerateObjectsUsingBlock:^(MWMSearchTabButtonsView * btn, NSUInteger idx, BOOL * stop)
{
if (btn.tag == selectedButtonTag)
{
self.selectedButton = btn;
*stop = YES;
}
}];
[self updateScrollPosition:self.selectedButton.minX];
[self.tablesCollectionView
scrollToItemAtIndexPath:[NSIndexPath indexPathForItem:selectedButtonTag inSection:0]
atScrollPosition:UICollectionViewScrollPositionCenteredHorizontally
animated:NO];
}
- (NSInteger)selectedButtonTag
{
return self.selectedButton.tag;
}
@end
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