//
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// IQTextView.m
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// https://github.com/hackiftekhar/IQKeyboardManager
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// Copyright (c) 2013-16 Iftekhar Qurashi.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#import "IQTextView.h"
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#import <UIKit/NSTextContainer.h>
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#import <UIKit/UIAccessibility.h>
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#import <UIKit/UILabel.h>
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#import <UIKit/UINibLoading.h>
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@interface IQTextView ()
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@property(nullable, nonatomic, strong) UILabel *IQ_PlaceholderLabel;
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@end
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@implementation IQTextView
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@synthesize placeholder = _placeholder;
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@synthesize IQ_PlaceholderLabel = _IQ_PlaceholderLabel;
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@synthesize placeholderTextColor = _placeholderTextColor;
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-(void)initialize
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{
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[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(refreshPlaceholder) name:UITextViewTextDidChangeNotification object:self];
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}
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-(void)dealloc
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{
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[_IQ_PlaceholderLabel removeFromSuperview];
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_IQ_PlaceholderLabel = nil;
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[[NSNotificationCenter defaultCenter] removeObserver:self];
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}
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- (instancetype)init
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{
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self = [super init];
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if (self) {
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[self initialize];
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}
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return self;
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}
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-(void)awakeFromNib
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{
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[super awakeFromNib];
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[self initialize];
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}
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-(void)refreshPlaceholder
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{
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if([[self text] length] || [[self attributedText] length])
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{
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if (self.IQ_PlaceholderLabel.alpha != 0) {
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[self.IQ_PlaceholderLabel setAlpha:0];
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[self setNeedsLayout];
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[self layoutIfNeeded];
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}
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}
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else if(self.IQ_PlaceholderLabel.alpha != 1)
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{
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[self.IQ_PlaceholderLabel setAlpha:1];
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[self setNeedsLayout];
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[self layoutIfNeeded];
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}
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}
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- (void)setText:(NSString *)text
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{
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[super setText:text];
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[self refreshPlaceholder];
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}
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-(void)setAttributedText:(NSAttributedString *)attributedText
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{
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[super setAttributedText:attributedText];
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[self refreshPlaceholder];
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}
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-(void)setFont:(UIFont *)font
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{
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[super setFont:font];
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self.IQ_PlaceholderLabel.font = self.font;
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[self setNeedsLayout];
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[self layoutIfNeeded];
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}
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-(void)setTextAlignment:(NSTextAlignment)textAlignment
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{
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[super setTextAlignment:textAlignment];
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self.IQ_PlaceholderLabel.textAlignment = textAlignment;
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[self setNeedsLayout];
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[self layoutIfNeeded];
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}
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-(void)layoutSubviews
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{
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[super layoutSubviews];
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self.IQ_PlaceholderLabel.frame = [self placeholderExpectedFrame];
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}
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-(void)setPlaceholder:(NSString *)placeholder
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{
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_placeholder = placeholder;
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self.IQ_PlaceholderLabel.text = placeholder;
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[self refreshPlaceholder];
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}
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-(void)setAttributedPlaceholder:(NSAttributedString *)attributedPlaceholder
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{
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_attributedPlaceholder = attributedPlaceholder;
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self.IQ_PlaceholderLabel.attributedText = attributedPlaceholder;
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[self refreshPlaceholder];
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}
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-(void)setPlaceholderTextColor:(UIColor*)placeholderTextColor
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{
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_placeholderTextColor = placeholderTextColor;
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self.IQ_PlaceholderLabel.textColor = placeholderTextColor;
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}
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-(UIEdgeInsets)placeholderInsets
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{
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return UIEdgeInsetsMake(self.textContainerInset.top, self.textContainerInset.left + self.textContainer.lineFragmentPadding, self.textContainerInset.bottom, self.textContainerInset.right + self.textContainer.lineFragmentPadding);
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}
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-(CGRect)placeholderExpectedFrame
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{
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UIEdgeInsets placeholderInsets = [self placeholderInsets];
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CGFloat maxWidth = CGRectGetWidth(self.frame)-placeholderInsets.left-placeholderInsets.right;
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CGSize expectedSize = [self.IQ_PlaceholderLabel sizeThatFits:CGSizeMake(maxWidth, CGRectGetHeight(self.frame)-placeholderInsets.top-placeholderInsets.bottom)];
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return CGRectMake(placeholderInsets.left, placeholderInsets.top, maxWidth, expectedSize.height);
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}
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-(UILabel*)IQ_PlaceholderLabel
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{
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if (_IQ_PlaceholderLabel == nil)
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{
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_IQ_PlaceholderLabel = [[UILabel alloc] init];
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_IQ_PlaceholderLabel.autoresizingMask = (UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight);
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_IQ_PlaceholderLabel.lineBreakMode = NSLineBreakByWordWrapping;
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_IQ_PlaceholderLabel.numberOfLines = 0;
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_IQ_PlaceholderLabel.font = self.font;
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_IQ_PlaceholderLabel.textAlignment = self.textAlignment;
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_IQ_PlaceholderLabel.backgroundColor = [UIColor clearColor];
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_IQ_PlaceholderLabel.isAccessibilityElement = NO;
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#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 130000
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if (@available(iOS 13.0, *)) {
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_IQ_PlaceholderLabel.textColor = [UIColor systemGrayColor];
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} else
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#endif
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{
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_IQ_PlaceholderLabel.textColor = [UIColor lightTextColor];
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}
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_IQ_PlaceholderLabel.alpha = 0;
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[self addSubview:_IQ_PlaceholderLabel];
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}
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return _IQ_PlaceholderLabel;
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}
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//When any text changes on textField, the delegate getter is called. At this time we refresh the textView's placeholder
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-(id<UITextViewDelegate>)delegate
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{
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[self refreshPlaceholder];
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return [super delegate];
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}
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-(CGSize)intrinsicContentSize
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{
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if (self.hasText) {
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return [super intrinsicContentSize];
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}
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UIEdgeInsets placeholderInsets = [self placeholderInsets];
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CGSize newSize = [super intrinsicContentSize];
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newSize.height = [self placeholderExpectedFrame].size.height + placeholderInsets.top + placeholderInsets.bottom;
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return newSize;
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}
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@end
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