session-ios/SignalMessaging/categories/UIFont+OWS.m
2018-04-11 09:34:37 -04:00

136 lines
3.1 KiB
Objective-C

//
// Copyright (c) 2018 Open Whisper Systems. All rights reserved.
//
#import "UIFont+OWS.h"
NS_ASSUME_NONNULL_BEGIN
@implementation UIFont (OWS)
+ (UIFont *)ows_thinFontWithSize:(CGFloat)size
{
return [UIFont systemFontOfSize:size weight:UIFontWeightThin];
}
+ (UIFont *)ows_lightFontWithSize:(CGFloat)size
{
return [UIFont systemFontOfSize:size weight:UIFontWeightLight];
}
+ (UIFont *)ows_regularFontWithSize:(CGFloat)size
{
return [UIFont systemFontOfSize:size weight:UIFontWeightRegular];
}
+ (UIFont *)ows_mediumFontWithSize:(CGFloat)size
{
return [UIFont systemFontOfSize:size weight:UIFontWeightMedium];
}
+ (UIFont *)ows_boldFontWithSize:(CGFloat)size
{
return [UIFont boldSystemFontOfSize:size];
}
#pragma mark - Icon Fonts
+ (UIFont *)ows_fontAwesomeFont:(CGFloat)size
{
return [UIFont fontWithName:@"FontAwesome" size:size];
}
+ (UIFont *)ows_dripIconsFont:(CGFloat)size
{
return [UIFont fontWithName:@"dripicons-v2" size:size];
}
+ (UIFont *)ows_elegantIconsFont:(CGFloat)size
{
return [UIFont fontWithName:@"ElegantIcons" size:size];
}
#pragma mark - Dynamic Type
+ (UIFont *)ows_dynamicTypeTitle1Font
{
return [UIFont preferredFontForTextStyle:UIFontTextStyleTitle1];
}
+ (UIFont *)ows_dynamicTypeTitle2Font
{
return [UIFont preferredFontForTextStyle:UIFontTextStyleTitle2];
}
+ (UIFont *)ows_dynamicTypeTitle3Font
{
return [UIFont preferredFontForTextStyle:UIFontTextStyleTitle3];
}
+ (UIFont *)ows_dynamicTypeHeadlineFont
{
return [UIFont preferredFontForTextStyle:UIFontTextStyleHeadline];
}
+ (UIFont *)ows_dynamicTypeSubheadlineFont
{
return [UIFont preferredFontForTextStyle:UIFontTextStyleSubheadline];
}
+ (UIFont *)ows_dynamicTypeBodyFont
{
return [UIFont preferredFontForTextStyle:UIFontTextStyleBody];
}
+ (UIFont *)ows_dynamicTypeFootnoteFont
{
return [UIFont preferredFontForTextStyle:UIFontTextStyleFootnote];
}
+ (UIFont *)ows_dynamicTypeCaption1Font
{
return [UIFont preferredFontForTextStyle:UIFontTextStyleCaption1];
}
+ (UIFont *)ows_dynamicTypeCaption2Font
{
return [UIFont preferredFontForTextStyle:UIFontTextStyleCaption2];
}
#pragma mark - Styles
- (UIFont *)ows_italic
{
return [self styleWithSymbolicTraits:UIFontDescriptorTraitItalic];
}
- (UIFont *)ows_bold
{
return [self styleWithSymbolicTraits:UIFontDescriptorTraitBold];
}
- (UIFont *)styleWithSymbolicTraits:(UIFontDescriptorSymbolicTraits)symbolicTraits
{
UIFontDescriptor *fontDescriptor = [self.fontDescriptor fontDescriptorWithSymbolicTraits:symbolicTraits];
UIFont *font = [UIFont fontWithDescriptor:fontDescriptor size:0];
OWSAssert(font);
return font ?: self;
}
- (UIFont *)ows_medium
{
// The recommended approach of deriving "medium" weight fonts for dynamic
// type fonts is:
//
// [UIFontDescriptor fontDescriptorByAddingAttributes:...]
//
// But this doesn't seem to work in practice on iOS 11 using UIFontWeightMedium.
UIFont *derivedFont = [UIFont systemFontOfSize:self.pointSize weight:UIFontWeightMedium];
return derivedFont;
}
@end
NS_ASSUME_NONNULL_END