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#import "MWMTextView.h"
#import "Common.h"
@interface MWMTextView ()
@property (nonatomic) UILabel * placeholderView;
@end
@implementation MWMTextView
- (instancetype)initWithCoder:(NSCoder *)coder
{
self = [super initWithCoder:coder];
if (self)
[self prepare];
return self;
}
- (instancetype)initWithFrame:(CGRect)frame textContainer:(NSTextContainer *)textContainer
{
self = [super initWithFrame:frame textContainer:textContainer];
if (self)
[self prepare];
return self;
}
- (void)prepare
{
[self setTextContainerInset:UIEdgeInsetsZero];
[self updatePlaceholderVisibility];
NSNotificationCenter * defaultCenter = [NSNotificationCenter defaultCenter];
[defaultCenter addObserver:self selector:@selector(textDidChange:)
name:UITextViewTextDidChangeNotification object:self];
self.clipsToBounds = YES;
}
- (UILabel *)placeholderView
{
if (!_placeholderView)
{
_placeholderView = [[UILabel alloc] initWithFrame:self.bounds];
_placeholderView.opaque = NO;
_placeholderView.backgroundColor = [UIColor clearColor];
_placeholderView.textColor = [UIColor lightGrayColor];
_placeholderView.textAlignment = self.textAlignment;
_placeholderView.userInteractionEnabled = NO;
_placeholderView.font = self.font;
_placeholderView.isAccessibilityElement = NO;
_placeholderView.numberOfLines = 0;
}
return _placeholderView;
}
#pragma mark - Setters
- (void)setPlaceholder:(NSString *)placeholder
{
_placeholder = placeholder.copy;
self.placeholderView.text = placeholder;
[self resizePlaceholderFrame];
}
- (void)setFont:(UIFont *)font
{
[super setFont:font];
self.placeholderView.font = font;
}
- (void)setAttributedText:(NSAttributedString *)attributedText
{
[super setAttributedText:attributedText];
[self updatePlaceholderVisibility];
}
- (void)setText:(NSString *)text
{
[super setText:text];
[self updatePlaceholderVisibility];
}
- (void)setTextAlignment:(NSTextAlignment)textAlignment
{
[super setTextAlignment:textAlignment];
self.placeholderView.textAlignment = textAlignment;
}
- (void)setTextContainerInset:(UIEdgeInsets)textContainerInset
{
[super setTextContainerInset:textContainerInset];
[self updatePlaceholderInset:textContainerInset];
}
- (void)layoutSubviews
{
[super layoutSubviews];
[self resizePlaceholderFrame];
}
- (void)resizePlaceholderFrame
{
[self.placeholderView sizeToFit];
}
- (void)textDidChange:(NSNotification *)aNotification
{
[self updatePlaceholderVisibility];
}
- (void)updatePlaceholderInset:(UIEdgeInsets)inset
{
CGFloat const kDefaultPlaceholderLeftInset = 5.0;
self.placeholderView.frame = CGRectMake(inset.left + kDefaultPlaceholderLeftInset, inset.top, self.bounds.size.width - inset.right, self.bounds.size.height - inset.bottom);
[self resizePlaceholderFrame];
}
- (void)updatePlaceholderVisibility
{
if (!self.text.length)
{
[self addSubview:self.placeholderView];
[self sendSubviewToBack:self.placeholderView];
}
else
{
[self.placeholderView removeFromSuperview];
}
}
@end
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