//
//  UITextView+MSRTL.m
//  YuMi
//
//  Created by duoban on 2024/4/11.
//

#import "UITextView+MSRTL.h"

@implementation UITextView (MSRTL)

+ (void)load {
  
        static dispatch_once_t onceToken;
        dispatch_once(&onceToken, ^{
            Method oldInitMethod = class_getInstanceMethod(self,@selector(initWithFrame:));
            Method newInitMethod = class_getInstanceMethod(self, @selector(msrtl_initWithFrame:));
            method_exchangeImplementations(oldInitMethod, newInitMethod);  //交换成功
            Method oldTextMethod = class_getInstanceMethod(self,@selector(setTextAlignment:));
            Method newTextMethod = class_getInstanceMethod(self, @selector(msrtl_setTextAlignment:));
            method_exchangeImplementations(oldTextMethod, newTextMethod);  //交换成功
            
//            Method oldTextMethod1 = class_getInstanceMethod(self,@selector(setPlaceholder:));
//            Method newTextMethod1 = class_getInstanceMethod(self, @selector(msrtl_setPlaceholder:));
//            method_exchangeImplementations(oldTextMethod1, newTextMethod1);  //交换成功
//            
//            
//            Method oldMethod = class_getInstanceMethod(self,@selector(setAttributedPlaceholder:));
//            Method newMethod = class_getInstanceMethod(self, @selector(msrtl_setAttributedPlaceholder:));
//            method_exchangeImplementations(oldMethod, newMethod);  //交换成功
        });
    
    
}
- (instancetype)msrtl_initWithFrame:(CGRect)frame {
    if ([self msrtl_initWithFrame:frame]) {
        self.textAlignment = NSTextAlignmentNatural;
    }
    return self;
}
- (void)msrtl_setTextAlignment:(NSTextAlignment)textAlignment {
    if (isMSRTL()) {
        if (textAlignment == NSTextAlignmentNatural || textAlignment == NSTextAlignmentLeft) {
            textAlignment = NSTextAlignmentRight;
        } else if (textAlignment == NSTextAlignmentRight) {
            textAlignment = NSTextAlignmentLeft;
        }
    }
    [self msrtl_setTextAlignment:textAlignment];
}
- (void)msrtl_setAttributedPlaceholder:(NSAttributedString *)attributedPlaceholder{
    NSMutableAttributedString *att = [[NSMutableAttributedString alloc]initWithAttributedString:attributedPlaceholder];
    NSMutableParagraphStyle *paragraph = [[NSMutableParagraphStyle alloc] init];
    NSTextAlignment textAli = isMSRTL() ? NSTextAlignmentRight : NSTextAlignmentLeft;
    paragraph.alignment = textAli;
    [att addAttributes:@{NSParagraphStyleAttributeName: paragraph} range:[attributedPlaceholder.string rangeOfString:attributedPlaceholder.string]];
    [self msrtl_setAttributedPlaceholder:att];
    
}
- (void)msrtl_setPlaceholder:(NSString *)placeholder {
//    NSAttributedString * attribute = [[NSAttributedString alloc] initWithString:placeholder];
    //        self.attributedPlaceholder = attribute;
}

@end