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#import "MWMToast.h"
#import "MWMCommon.h"
#import "SwiftBridge.h"
namespace
{
void * kContext = &kContext;
NSString * const kKeyPath = @"sublayers";
NSUInteger const kWordsPerSecond = 3;
} // namespace
@interface MWMToast ()
@property(nonatomic) IBOutlet UIView * rootView;
@property(nonatomic) IBOutlet UILabel * label;
@property(nonatomic) NSLayoutConstraint * bottomOffset;
@end
@implementation MWMToast
+ (void)showWithText:(NSString *)text
{
MWMToast * toast = [self toast];
toast.label.text = text;
toast.label.textColor = [UIColor blackPrimaryText];
toast.rootView.backgroundColor = [UIColor toastBackground];
[toast show];
}
+ (BOOL)affectsStatusBar { return [self toast].rootView.superview != nil; }
+ (UIStatusBarStyle)preferredStatusBarStyle
{
setStatusBarBackgroundColor([UIColor clearColor]);
return [UIColor isNightMode] ? UIStatusBarStyleLightContent : UIStatusBarStyleDefault;
}
+ (MWMToast *)toast
{
static MWMToast * toast;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
toast = [[super alloc] initToast];
});
return toast;
}
- (instancetype)initToast
{
self = [super init];
if (self)
{
[[NSBundle mainBundle] loadNibNamed:[[self class] className] owner:self options:nil];
self.rootView.translatesAutoresizingMaskIntoConstraints = NO;
}
return self;
}
- (void)configLayout
{
UIView * sv = self.rootView;
[sv removeFromSuperview];
auto tvc = [UIViewController topViewController];
UIView * ov = tvc.view;
if (!tvc.navigationController.navigationBarHidden)
ov = tvc.navigationController.navigationBar.superview;
[ov addSubview:sv];
NSLayoutConstraint * topOffset = [NSLayoutConstraint constraintWithItem:sv
attribute:NSLayoutAttributeTop
relatedBy:NSLayoutRelationEqual
toItem:ov
attribute:NSLayoutAttributeTop
multiplier:1
constant:0];
topOffset.priority = UILayoutPriorityDefaultLow;
self.bottomOffset = [NSLayoutConstraint constraintWithItem:sv
attribute:NSLayoutAttributeBottom
relatedBy:NSLayoutRelationEqual
toItem:ov
attribute:NSLayoutAttributeTop
multiplier:1
constant:0];
self.bottomOffset.priority = UILayoutPriorityDefaultHigh;
NSLayoutConstraint * leadingOffset =
[NSLayoutConstraint constraintWithItem:sv
attribute:NSLayoutAttributeLeading
relatedBy:NSLayoutRelationEqual
toItem:ov
attribute:NSLayoutAttributeLeading
multiplier:1
constant:0];
NSLayoutConstraint * trailingOffset =
[NSLayoutConstraint constraintWithItem:sv
attribute:NSLayoutAttributeTrailing
relatedBy:NSLayoutRelationEqual
toItem:ov
attribute:NSLayoutAttributeTrailing
multiplier:1
constant:0];
[ov addConstraints:@[ topOffset, self.bottomOffset, leadingOffset, trailingOffset ]];
[ov setNeedsLayout];
}
- (void)scheduleHide
{
[NSObject cancelPreviousPerformRequestsWithTarget:self];
NSString * text = self.label.text;
NSArray<NSString *> * words = [text componentsSeparatedByString:@" "];
NSTimeInterval const delay = MAX(2, 1 + words.count / kWordsPerSecond);
[self performSelector:@selector(hide) withObject:nil afterDelay:delay];
}
- (void)show
{
[self configLayout];
UIView * ov = [UIViewController topViewController].view;
runAsyncOnMainQueue(^{
[ov layoutIfNeeded];
self.bottomOffset.priority = UILayoutPriorityFittingSizeLevel;
[UIView animateWithDuration:kDefaultAnimationDuration
animations:^{
[ov layoutIfNeeded];
}
completion:^(BOOL finished) {
[self subscribe];
[[UIViewController topViewController] setNeedsStatusBarAppearanceUpdate];
[self scheduleHide];
}];
});
}
- (void)hide
{
[self unsubscribe];
UIView * ov = [UIViewController topViewController].view;
[ov layoutIfNeeded];
self.bottomOffset.priority = UILayoutPriorityDefaultHigh;
[UIView animateWithDuration:kDefaultAnimationDuration
animations:^{
[ov layoutIfNeeded];
}
completion:^(BOOL finished) {
[self.rootView removeFromSuperview];
[[UIViewController topViewController] setNeedsStatusBarAppearanceUpdate];
}];
}
- (void)subscribe
{
UIView * sv = self.rootView;
UIView * ov = sv.superview;
CALayer * ol = ov.layer;
[ol addObserver:self forKeyPath:kKeyPath options:NSKeyValueObservingOptionNew context:kContext];
}
- (void)unsubscribe
{
UIView * sv = self.rootView;
UIView * ov = sv.superview;
CALayer * ol = ov.layer;
[ol removeObserver:self forKeyPath:kKeyPath context:kContext];
}
- (void)observeValueForKeyPath:(NSString *)keyPath
ofObject:(id)object
change:(NSDictionary *)change
context:(void *)context
{
if (context == kContext)
{
UIView * sv = self.rootView;
UIView * ov = sv.superview;
[ov bringSubviewToFront:sv];
return;
}
[super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
}
@end
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