//
//  MQMessageFormTextView.m
//  MeiQiaSDK
//
//  Created by bingoogolapple on 16/5/6.
//  Copyright © 2016年 MeiQia Inc. All rights reserved.
//

#import "MQMessageFormTextView.h"

@implementation MQMessageFormTextView

- (instancetype)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(textDidChange) name:UITextViewTextDidChangeNotification object:self];
    }
    return self;
}

- (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (void)textDidChange {
    [self setNeedsDisplay];
}

- (void)setPlaceholder:(NSString *)placeholder {
    _placeholder = [placeholder copy];
    [self setNeedsDisplay];
}

- (void)setTintColor:(UIColor *)tintColor {
    [super setTintColor:tintColor];
    [self setNeedsDisplay];
}

- (void)setAttributedText:(NSAttributedString *)attributedText {
    [super setAttributedText:attributedText];
    [self setNeedsDisplay];
}

- (void)setText:(NSString *)text {
    [super setText:text];
    [self setNeedsDisplay];
}

- (void)setFont:(UIFont *)font {
    [super setFont:font];
    [self setNeedsDisplay];
}

- (void)setFrame:(CGRect)frame {
    [super setFrame:frame];
    [self setNeedsDisplay];
}

- (void)drawRect:(CGRect)rect {
    // 如果有输入文字，就直接返回，不画占位文字
    if (self.hasText) return;
    
    // 文字属性
    NSMutableDictionary *attrs = [NSMutableDictionary dictionary];
    attrs[NSFontAttributeName] = self.font;
    attrs[NSForegroundColorAttributeName] = self.tintColor;
    
    rect.origin.x = 5;
    rect.origin.y = 8;
    rect.size.width -= 2 * rect.origin.x;
    rect.size.height -= 2 * rect.origin.y;
    
    [self.placeholder drawInRect:rect withAttributes:attrs];
}

@end