//
//  HKHTextField.m
//  myhome
//
//  Created by hkh on 16/9/19.
//
//

#import "HKHTextField.h"
#import "Pub.h"

@interface HKHTextField()

@property (nonatomic)  int maxLength;               // 可以输入的最大长度.默认值是 INT32_MAX
@property (nonatomic)  BOOL exitOnKeyReturn;        // 键盘的 return/done ..etc 按下，是否隐藏键盘。 默认是 true
@end

@implementation HKHTextField

// called by code
- (instancetype)init
{
    self = [super init];
    if (self) {
        [self customeInit];
    }
    return self;
}

// call when init from storyboard/xib/nib file
- (instancetype)initWithCoder:(NSCoder *)coder
{
    self = [super initWithCoder:coder];
    if (self) {
        [self customeInit];
    }
    return self;
}

// called by code
- (instancetype)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        [self customeInit];
    }
    return self;
}

// 自定义属性的初始化
-(void) customeInit {
    _maxLength = INT32_MAX;
    _exitOnKeyReturn = true;
    // return 按下，键盘隐藏
    [self addTarget:self action:@selector(onEndOnExit) forControlEvents:UIControlEventEditingDidEndOnExit];
    [self addTarget:self action:@selector(onEditingDidBegin) forControlEvents:UIControlEventEditingDidBegin];
}

-(void) setMaxLength:(int)maxLen {
    _maxLength = maxLen;
    // UITextField的最大长度
    [self addTarget:self action:@selector(textDidChanged:) forControlEvents:UIControlEventEditingChanged];
}

/**
 *  when textfiled's text did changed, and not end editing, this action will be call.
 *  At this moment, wo can check the length.
 **/
-(void) textDidChanged:(UITextField*)tf {
    if(tf.text.length > _maxLength) {
        tf.text = [tf.text substringToIndex:_maxLength-1];
    }
}

/**
 * enable/disable the software keyboard hide function when user tap the keyboard return key
 *
 **/
-(void) setExitOnKeyReturn:(BOOL)exit {
    if (exit && self.exitOnKeyReturn) {
        return;
    }
    
    if (exit) {
        [self customeInit];
    } else {
        _exitOnKeyReturn = false;
        [self removeTarget:self action:@selector(textDidChanged:) forControlEvents:UIControlEventEditingDidEndOnExit];
    }
}

-(void) onEditingDidBegin {
    NSLog(@"onEditingDidBegin");
    [Pub getApp].activeTextField = self;
}
-(void) onEndOnExit {
    [self resignFirstResponder];
    [Pub getApp].activeTextField = nil;
}

@end