kmpdfkit_demo/PDFViewer/Source/PDFKeyboardToolbar/PDFKTFontNamePopBgView.m

//
//  PDFKTFontNamePopBgView.m
//  PDFReader
//
//  Copyright © 2014-2022 PDF Technologies, Inc. All Rights Reserved.
//
//  The PDF Reader Sample applications are licensed with a modified BSD license.
//  Please see License for details. This notice may not be removed from this file.
//

#import "PDFKTFontNamePopBgView.h"

#define CONTENT_INSET 3.0
#define CAP_INSET 20.0
#define ARROW_BASE 42.0
#define ARROW_HEIGHT 16.0

@interface PDFKTFontNamePopBgView ()
{
    UIImageView *_borderImageView;
    UIImageView *_arrowView;
    CGFloat _arrowOffset;
    UIPopoverArrowDirection _arrowDirection;
}

@end

@implementation PDFKTFontNamePopBgView

- (instancetype)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        
        self.backgroundColor = [UIColor clearColor];
        self.layer.shadowOffset = CGSizeZero;
        self.layer.shadowColor = [[UIColor clearColor] CGColor];
        self.layer.cornerRadius = 0.0;
        
        _borderImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"text_bg"]];
        _arrowView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"text_arrow_bg"]];
        
        [self addSubview:_borderImageView];
        [self addSubview:_arrowView];
    }
    
    return self;
}

- (CGFloat) arrowOffset
{
    return _arrowOffset;
}

- (void) setArrowOffset:(CGFloat)arrowOffset
{
    _arrowOffset = arrowOffset;
}

- (UIPopoverArrowDirection)arrowDirection
{
    return _arrowDirection;
}

- (void)setArrowDirection:(UIPopoverArrowDirection)arrowDirection
{
    _arrowDirection = arrowDirection;
}


+(UIEdgeInsets)contentViewInsets
{
    return UIEdgeInsetsMake(CONTENT_INSET, CONTENT_INSET, CONTENT_INSET, CONTENT_INSET);
}

+(CGFloat)arrowHeight
{
    return ARROW_HEIGHT;
}

+(CGFloat)arrowBase
{
    return ARROW_BASE;
}

+ (BOOL)wantsDefaultContentAppearance
{
    return NO;
}

-  (void)layoutSubviews {
    [super layoutSubviews];
    
    CGFloat _height = self.frame.size.height;
    CGFloat _width = self.frame.size.width;
    CGFloat _left = 0.0;
    CGFloat _top = 0.0;
    CGFloat _coordinate = 0.0;
    CGAffineTransform _rotation = CGAffineTransformIdentity;
    
    
    switch (self.arrowDirection) {
        case UIPopoverArrowDirectionUp:
            _top += ARROW_HEIGHT;
            _height -= ARROW_HEIGHT;
            _coordinate = ((self.frame.size.width / 2) + self.arrowOffset) - (ARROW_BASE/2);
            _arrowView.frame = CGRectMake(_coordinate, 0, ARROW_BASE, ARROW_HEIGHT);
            _rotation = CGAffineTransformMakeRotation( M_PI );
            break;
            
        case UIPopoverArrowDirectionDown:
            _height -= ARROW_HEIGHT;
            _coordinate = ((self.frame.size.width / 2) + self.arrowOffset) - (ARROW_BASE/2);
            _arrowView.frame = CGRectMake(_coordinate, _height, ARROW_BASE, ARROW_HEIGHT);
            break;
            
        case UIPopoverArrowDirectionLeft:
            _left += ARROW_BASE;
            _width -= ARROW_BASE;
            _coordinate = ((self.frame.size.height / 2) + self.arrowOffset) - (ARROW_HEIGHT/2);
            _arrowView.frame = CGRectMake(0, _coordinate, ARROW_BASE, ARROW_HEIGHT);
            _rotation = CGAffineTransformMakeRotation( M_PI_2 );
            break;
            
        case UIPopoverArrowDirectionRight:
            _width -= ARROW_BASE;
            _coordinate = ((self.frame.size.height / 2) + self.arrowOffset)- (ARROW_HEIGHT/2);
            _arrowView.frame = CGRectMake(_width, _coordinate, ARROW_BASE, ARROW_HEIGHT);
            _rotation = CGAffineTransformMakeRotation( -M_PI_2 );
            
            break;
    }
    
    _borderImageView.frame =  CGRectMake(_left, _top, _width, _height);
    
    [_arrowView setTransform:_rotation];
}

- (void)dealloc
{
    [_borderImageView release];
    [_arrowView release];
    [super dealloc];
}

@end