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Allow text to be both bold and italic #150

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Allow text to be both bold and italic #150

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202f34a
scaledFont(for:)
gsbernstein Jan 31, 2024
f7e7e0b
allow text to be both bold and italic
gsbernstein Jan 31, 2024
9b259c4
indentation
gsbernstein Mar 26, 2024
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325 changes: 167 additions & 158 deletions Sources/SwiftyMarkdown/SwiftyMarkdown+iOS.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -12,163 +12,172 @@ import Foundation
import UIKit

extension SwiftyMarkdown {

func font( for line : SwiftyLine, characterOverride : CharacterStyle? = nil ) -> UIFont {
let textStyle : UIFont.TextStyle
var fontName : String?
var fontSize : CGFloat?

var globalBold = false
var globalItalic = false

let style : FontProperties
// What type are we and is there a font name set?
switch line.lineStyle as! MarkdownLineStyle {
case .h1:
style = self.h1
if #available(iOS 9, *) {
textStyle = UIFont.TextStyle.title1
} else {
textStyle = UIFont.TextStyle.headline
}
case .h2:
style = self.h2
if #available(iOS 9, *) {
textStyle = UIFont.TextStyle.title2
} else {
textStyle = UIFont.TextStyle.headline
}
case .h3:
style = self.h3
if #available(iOS 9, *) {
textStyle = UIFont.TextStyle.title2
} else {
textStyle = UIFont.TextStyle.subheadline
}
case .h4:
style = self.h4
textStyle = UIFont.TextStyle.headline
case .h5:
style = self.h5
textStyle = UIFont.TextStyle.subheadline
case .h6:
style = self.h6
textStyle = UIFont.TextStyle.footnote
case .codeblock:
style = self.code
textStyle = UIFont.TextStyle.body
case .blockquote:
style = self.blockquotes
textStyle = UIFont.TextStyle.body
default:
style = self.body
textStyle = UIFont.TextStyle.body
}

fontName = style.fontName
fontSize = style.fontSize
switch style.fontStyle {
case .bold:
globalBold = true
case .italic:
globalItalic = true
case .boldItalic:
globalItalic = true
globalBold = true
case .normal:
break
}

if fontName == nil {
fontName = body.fontName
}

if let characterOverride = characterOverride {
switch characterOverride {
case .code:
fontName = code.fontName ?? fontName
fontSize = code.fontSize
case .link:
fontName = link.fontName ?? fontName
fontSize = link.fontSize
case .bold:
fontName = bold.fontName ?? fontName
fontSize = bold.fontSize
globalBold = true
case .italic:
fontName = italic.fontName ?? fontName
fontSize = italic.fontSize
globalItalic = true
case .strikethrough:
fontName = strikethrough.fontName ?? fontName
fontSize = strikethrough.fontSize
default:
break
}
}

fontSize = fontSize == 0.0 ? nil : fontSize
var font : UIFont
if let existentFontName = fontName {
font = UIFont.preferredFont(forTextStyle: textStyle)
let finalSize : CGFloat
if let existentFontSize = fontSize {
finalSize = existentFontSize
} else {
let styleDescriptor = UIFontDescriptor.preferredFontDescriptor(withTextStyle: textStyle)
finalSize = styleDescriptor.fontAttributes[.size] as? CGFloat ?? CGFloat(14)
}

if let customFont = UIFont(name: existentFontName, size: finalSize) {
let fontMetrics = UIFontMetrics(forTextStyle: textStyle)
font = fontMetrics.scaledFont(for: customFont)
} else {
font = UIFont.preferredFont(forTextStyle: textStyle)
}
} else {
font = UIFont.preferredFont(forTextStyle: textStyle)
}

if globalItalic, let italicDescriptor = font.fontDescriptor.withSymbolicTraits(.traitItalic) {
font = UIFont(descriptor: italicDescriptor, size: fontSize ?? 0)
}
if globalBold, let boldDescriptor = font.fontDescriptor.withSymbolicTraits(.traitBold) {
font = UIFont(descriptor: boldDescriptor, size: fontSize ?? 0)
}

return font

}

func color( for line : SwiftyLine ) -> UIColor {
// What type are we and is there a font name set?
switch line.lineStyle as! MarkdownLineStyle {
case .yaml:
return body.color
case .h1, .previousH1:
return h1.color
case .h2, .previousH2:
return h2.color
case .h3:
return h3.color
case .h4:
return h4.color
case .h5:
return h5.color
case .h6:
return h6.color
case .body:
return body.color
case .codeblock:
return code.color
case .blockquote:
return blockquotes.color
case .unorderedList, .unorderedListIndentFirstOrder, .unorderedListIndentSecondOrder, .orderedList, .orderedListIndentFirstOrder, .orderedListIndentSecondOrder:
return body.color
case .referencedLink:
return link.color
}
}


func font( for line : SwiftyLine, characterOverride : CharacterStyle? = nil ) -> UIFont {
let textStyle : UIFont.TextStyle
var fontName : String?
var fontSize : CGFloat?

var globalBold = false
var globalItalic = false

let style : FontProperties
// What type are we and is there a font name set?
switch line.lineStyle as! MarkdownLineStyle {
case .h1:
style = self.h1
if #available(iOS 9, *) {
textStyle = UIFont.TextStyle.title1
} else {
textStyle = UIFont.TextStyle.headline
}
case .h2:
style = self.h2
if #available(iOS 9, *) {
textStyle = UIFont.TextStyle.title2
} else {
textStyle = UIFont.TextStyle.headline
}
case .h3:
style = self.h3
if #available(iOS 9, *) {
textStyle = UIFont.TextStyle.title2
} else {
textStyle = UIFont.TextStyle.subheadline
}
case .h4:
style = self.h4
textStyle = UIFont.TextStyle.headline
case .h5:
style = self.h5
textStyle = UIFont.TextStyle.subheadline
case .h6:
style = self.h6
textStyle = UIFont.TextStyle.footnote
case .codeblock:
style = self.code
textStyle = UIFont.TextStyle.body
case .blockquote:
style = self.blockquotes
textStyle = UIFont.TextStyle.body
default:
style = self.body
textStyle = UIFont.TextStyle.body
}

fontName = style.fontName
fontSize = style.fontSize
switch style.fontStyle {
case .bold:
globalBold = true
case .italic:
globalItalic = true
case .boldItalic:
globalItalic = true
globalBold = true
case .normal:
break
}

if fontName == nil {
fontName = body.fontName
}

if let characterOverride = characterOverride {
switch characterOverride {
case .code:
fontName = code.fontName ?? fontName
fontSize = code.fontSize
case .link:
fontName = link.fontName ?? fontName
fontSize = link.fontSize
case .bold:
fontName = bold.fontName ?? fontName
fontSize = bold.fontSize
globalBold = true
case .italic:
fontName = italic.fontName ?? fontName
fontSize = italic.fontSize
globalItalic = true
case .boldItalic:
globalBold = true
globalItalic = true
case .strikethrough:
fontName = strikethrough.fontName ?? fontName
fontSize = strikethrough.fontSize
default:
break
}
}

fontSize = fontSize == 0.0 ? nil : fontSize
var font : UIFont
if let existentFontName = fontName {
font = UIFont.preferredFont(forTextStyle: textStyle)
let finalSize : CGFloat
if let existentFontSize = fontSize {
finalSize = existentFontSize
} else {
let styleDescriptor = UIFontDescriptor.preferredFontDescriptor(withTextStyle: textStyle)
finalSize = styleDescriptor.fontAttributes[.size] as? CGFloat ?? CGFloat(14)
}

if let customFont = UIFont(name: existentFontName, size: finalSize) {
let fontMetrics = UIFontMetrics(forTextStyle: textStyle)
font = fontMetrics.scaledFont(for: customFont)
} else {
font = UIFont.preferredFont(forTextStyle: textStyle)
}
} else {
font = UIFont.preferredFont(forTextStyle: textStyle)
}

var traits: UIFontDescriptor.SymbolicTraits = []
if globalItalic {
traits.insert(.traitItalic)
}
if globalBold {
traits.insert(.traitBold)
}
if !traits.isEmpty, let descriptor = font.fontDescriptor.withSymbolicTraits(traits) {
let customFont = UIFont(descriptor: descriptor, size: fontSize ?? 0)
let fontMetrics = UIFontMetrics(forTextStyle: textStyle)
font = fontMetrics.scaledFont(for: customFont)
}

return font

}

func color( for line : SwiftyLine ) -> UIColor {
// What type are we and is there a font name set?
switch line.lineStyle as! MarkdownLineStyle {
case .yaml:
return body.color
case .h1, .previousH1:
return h1.color
case .h2, .previousH2:
return h2.color
case .h3:
return h3.color
case .h4:
return h4.color
case .h5:
return h5.color
case .h6:
return h6.color
case .body:
return body.color
case .codeblock:
return code.color
case .blockquote:
return blockquotes.color
case .unorderedList, .unorderedListIndentFirstOrder, .unorderedListIndentSecondOrder, .orderedList, .orderedListIndentFirstOrder, .orderedListIndentSecondOrder:
return body.color
case .referencedLink:
return link.color
}
}

}
#endif
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