featherVoice/TUIKit/TIMCommon/CommonModel/TUIFloatViewController.m

//
//  TUIFloatTitleView.m
//  TUI
//
//  Created by wyl on 2023/1/16.
//  Copyright © 2023 Tencent. All rights reserved.
//

#import "TUIFloatViewController.h"
#import <TIMCommon/TIMDefine.h>

typedef enum : NSUInteger {
    FLEX_TOP,
    FLEX_Bottom,
} FLEX_Location;

@interface TUIFloatTitleView ()

@end

@implementation TUIFloatTitleView

- (instancetype)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        [self setupView];
    }
    return self;
}

- (void)setupView {
    self.titleLabel = [[UILabel alloc] init];
    self.titleLabel.text = @"";
    self.titleLabel.font = [UIFont boldSystemFontOfSize:kScale390(20)];
    [self addSubview:self.titleLabel];

    self.subTitleLabel = [[UILabel alloc] init];
    self.subTitleLabel.text = @"";
    self.subTitleLabel.font = [UIFont systemFontOfSize:kScale390(12)];
    self.subTitleLabel.tintColor = [UIColor grayColor];
    [self addSubview:self.subTitleLabel];

    self.leftButton = [UIButton buttonWithType:UIButtonTypeCustom];
    [self addSubview:self.leftButton];
    [self.leftButton setTitle:TIMCommonLocalizableString(TUIKitCreateCancel) forState:UIControlStateNormal];
    self.leftButton.titleLabel.font = [UIFont systemFontOfSize:kScale390(16)];
    [self.leftButton addTarget:self action:@selector(leftButtonClick) forControlEvents:UIControlEventTouchUpInside];
    [self.leftButton setTitleColor:[UIColor tui_colorWithHex:@"#0365F9"] forState:UIControlStateNormal];

    self.rightButton = [UIButton buttonWithType:UIButtonTypeCustom];
    [self addSubview:self.rightButton];
    [self.rightButton setTitle:TIMCommonLocalizableString(TUIKitCreateNext) forState:UIControlStateNormal];
    self.rightButton.titleLabel.font = [UIFont systemFontOfSize:kScale390(16)];
    [self.rightButton addTarget:self action:@selector(rightButtonClick) forControlEvents:UIControlEventTouchUpInside];
    [self.rightButton setTitleColor:[UIColor tui_colorWithHex:@"#0365F9"] forState:UIControlStateNormal];
}

- (void)layoutSubviews {
    [super layoutSubviews];

    [self.titleLabel sizeToFit];
    [self.subTitleLabel sizeToFit];

    if (self.subTitleLabel.isHidden || self.subTitleLabel.text.length == 0) {
        self.titleLabel.frame = CGRectMake((self.frame.size.width - self.titleLabel.frame.size.width) * 0.5, kScale390(23.5), self.titleLabel.frame.size.width,
                                           self.titleLabel.frame.size.height);
    } else {
        self.titleLabel.frame = CGRectMake((self.frame.size.width - self.titleLabel.frame.size.width) * 0.5, kScale390(17.5), self.titleLabel.frame.size.width,
                                           self.titleLabel.frame.size.height);

        self.subTitleLabel.frame = CGRectMake((self.frame.size.width - self.subTitleLabel.frame.size.width) * 0.5,
                                              self.titleLabel.frame.origin.y + self.titleLabel.frame.size.height + kScale390(1),
                                              self.subTitleLabel.frame.size.width, self.subTitleLabel.frame.size.height);
    }

    [self.leftButton sizeToFit];
    self.leftButton.frame = CGRectMake(kScale390(15), kScale390(23.5), self.leftButton.frame.size.width, self.leftButton.frame.size.height);

    [self.rightButton sizeToFit];
    self.rightButton.frame = CGRectMake(self.frame.size.width - self.rightButton.frame.size.width - kScale390(14), kScale390(23.5),
                                        self.rightButton.frame.size.width, self.rightButton.frame.size.height);
    if (isRTL()){
        [self.leftButton resetFrameToFitRTL];
        [self.rightButton resetFrameToFitRTL];
    }
}
- (void)leftButtonClick {
    if (self.leftButtonClickCallback) {
        self.leftButtonClickCallback();
    }
}

- (void)rightButtonClick {
    if (self.rightButtonClickCallback) {
        self.rightButtonClickCallback();
    }
}

- (void)setTitleText:(NSString *)mainText subTitleText:(NSString *)secondText leftBtnText:(NSString *)leftBtnText rightBtnText:(NSString *)rightBtnText {
    self.titleLabel.text = mainText;
    self.subTitleLabel.text = secondText;
    [self.leftButton setTitle:leftBtnText forState:UIControlStateNormal];
    [self.rightButton setTitle:rightBtnText forState:UIControlStateNormal];
}
@end

@interface TUIFloatViewController ()

@property(nonatomic, assign) CGFloat topMargin;

@property(nonatomic, assign) FLEX_Location currentLoaction;

@property(nonatomic, strong) UIPanGestureRecognizer *panCover;

@property(nonatomic, strong) UITapGestureRecognizer *singleTap;

@end

@implementation TUIFloatViewController

- (void)appendChildViewController:(UIViewController<TUIFloatSubViewControllerProtocol> *)vc topMargin:(CGFloat)topMargin {
    self.childVC = vc;
    self.topMargin = topMargin;

    [self addChildViewController:vc];
    [self.containerView addSubview:vc.view];
}

- (void)viewDidLoad {
    [super viewDidLoad];

    self.view.backgroundColor = [UIColor tui_colorWithHex:@"#000000" alpha:0.6];
    self.modalPresentationStyle = UIModalPresentationCustom;

    self.containerView.backgroundColor = [UIColor whiteColor];

    self.topImgView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:TIMCommonImagePath(@"icon_flex_arrow")]];
    [self.topGestureView addSubview:self.topImgView];
    self.topImgView.hidden = YES;

    @weakify(self);
    self.topGestureView.leftButtonClickCallback = ^{
      @strongify(self);
      if ([self.childVC respondsToSelector:@selector(floatControllerLeftButtonClick)]) {
          [self.childVC performSelector:@selector(floatControllerLeftButtonClick)];
      }
    };
    self.topGestureView.rightButtonClickCallback = ^{
      @strongify(self);
      if ([self.childVC respondsToSelector:@selector(floatControllerRightButtonClick)]) {
          [self.childVC performSelector:@selector(floatControllerRightButtonClick)];
      }
    };
    [self addSingleTapGesture];

    if (!_currentLoaction) {
        self.currentLoaction = FLEX_TOP;
    }

    [self updateSubContainerView];
}

- (void)addSingleTapGesture {
    // When clicking on the shadow, the page disappears
    self.view.userInteractionEnabled = YES;
    UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(singleTap:)];
    singleTap.cancelsTouchesInView = NO;
    [self.view addGestureRecognizer:singleTap];
}

- (void)singleTap:(UITapGestureRecognizer *)tap {
    CGPoint translation = [tap locationInView:self.containerView];

    if (translation.x < 0 || translation.y < 0) {
        [self dismissViewControllerAnimated:YES completion:nil];
    } else if (translation.x > self.containerView.frame.size.width || translation.y > self.containerView.frame.size.height) {
        [self dismissViewControllerAnimated:YES completion:nil];
    }
}

- (void)setnormalTop {
    self.currentLoaction = FLEX_TOP;
}

- (void)setNormalBottom {
    self.currentLoaction = FLEX_Bottom;
}

- (void)setCurrentLoaction:(FLEX_Location)currentLoaction {
    _currentLoaction = currentLoaction;
    if (currentLoaction == FLEX_TOP) {
        self.containerView.frame = CGRectMake(0, self.topMargin, self.view.frame.size.width, self.view.frame.size.height - self.topMargin);
    } else if (currentLoaction == FLEX_Bottom) {
        self.containerView.frame = CGRectMake(0, self.view.frame.size.height - kScale390(393), self.view.frame.size.width, kScale390(393));
    }
}

- (void)floatDismissViewControllerAnimated:(BOOL)flag completion:(void (^)(void))completion {
    [self dismissViewControllerAnimated:flag completion:completion];
}
#pragma mark - lazy

- (UIView *)containerView {
    if (_containerView == nil) {
        _containerView = [[UIView alloc] init];
        _containerView.layer.cornerRadius = kScale390(12);
        [self.view addSubview:_containerView];
    }
    return _containerView;
}

- (UIView *)topGestureView {
    if (_topGestureView == nil) {
        _topGestureView = [[TUIFloatTitleView alloc] init];
        //        [_topGestureView addGestureRecognizer:self.panCover];
        [self.containerView addSubview:_topGestureView];
    }
    return _topGestureView;
}

- (UIPanGestureRecognizer *)panCover {
    if (_panCover == nil) {
        _panCover = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(onPanCover:)];
    }
    return _panCover;
}

- (void)onPanCover:(UIPanGestureRecognizer *)pan {
    CGPoint translation = [pan translationInView:self.topGestureView];
    CGFloat absX = fabs(translation.x);
    CGFloat absY = fabs(translation.y);

    if (MAX(absX, absY) < 2) return;
    if (absX > absY) {
        if (translation.x < 0) {
            // scroll left
        } else {
            // scroll right
        }
    } else if (absY > absX) {
        if (translation.y < 0) {
            // scroll up
            [self.topGestureView removeGestureRecognizer:self.panCover];
            [UIView animateWithDuration:0.3
                animations:^{
                  self.currentLoaction = FLEX_TOP;
                  [self.topGestureView addGestureRecognizer:self.panCover];
                }
                completion:^(BOOL finished) {
                  if (finished) {
                      [self updateSubContainerView];
                  }
                }];
        } else {
            // scroll down
            if (self.currentLoaction == FLEX_Bottom) {
                [self dismissViewControllerAnimated:YES completion:nil];
            }
            [self.topGestureView removeGestureRecognizer:self.panCover];
            [UIView animateWithDuration:0.3
                animations:^{
                  self.currentLoaction = FLEX_Bottom;
                  [self.topGestureView addGestureRecognizer:self.panCover];
                }
                completion:^(BOOL finished) {
                  if (finished) {
                      dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.3 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
                        [self updateSubContainerView];
                      });
                  }
                }];
        }
    }
}

- (void)updateSubContainerView {
    self.topGestureView.frame = CGRectMake(0, 0, self.containerView.frame.size.width, kScale390(68.5));
    self.topImgView.frame = CGRectMake((self.topGestureView.frame.size.width - kScale390(24)) * 0.5, kScale390(22), kScale390(24), kScale390(6));

    self.childVC.view.frame = CGRectMake(0, self.topGestureView.frame.origin.y + self.topGestureView.frame.size.height, self.containerView.frame.size.width,
                                         self.containerView.frame.size.height - self.topGestureView.frame.size.height);
}
@end