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session-ios/Signal/src/ViewControllers/ConversationView/Cells/OWSLabel.m

77 lines
1.5 KiB
Objective-C

//
// Copyright (c) 2018 Open Whisper Systems. All rights reserved.
//
#import "OWSLabel.h"
NS_ASSUME_NONNULL_BEGIN
@interface OWSLabel ()
@property (nonatomic, nullable) NSValue *cachedSize;
@end
#pragma mark -
@implementation OWSLabel
- (void)setText:(nullable NSString *)text
{
if ([NSObject isNullableObject:text equalTo:self.text]) {
return;
}
[super setText:text];
self.cachedSize = nil;
}
- (void)setAttributedText:(nullable NSAttributedString *)attributedText
{
if ([NSObject isNullableObject:attributedText equalTo:self.attributedText]) {
return;
}
[super setAttributedText:attributedText];
self.cachedSize = nil;
}
- (void)setTextColor:(nullable UIColor *)textColor
{
if ([NSObject isNullableObject:textColor equalTo:self.textColor]) {
return;
}
[super setTextColor:textColor];
// No need to clear cached size here.
}
- (void)setFont:(nullable UIFont *)font
{
if ([NSObject isNullableObject:font equalTo:self.font]) {
return;
}
[super setFont:font];
self.cachedSize = nil;
}
- (void)setLineBreakMode:(NSLineBreakMode)lineBreakMode
{
if (self.lineBreakMode == lineBreakMode) {
return;
}
[super setLineBreakMode:lineBreakMode];
self.cachedSize = nil;
}
- (CGSize)sizeThatFits:(CGSize)size
{
if (self.cachedSize) {
return self.cachedSize.CGSizeValue;
}
CGSize result = [super sizeThatFits:size];
self.cachedSize = [NSValue valueWithCGSize:result];
return result;
}
@end
NS_ASSUME_NONNULL_END