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Tiny markdown parser, makes tutorial screens editing much simpler

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relikd
2020-08-31 17:10:11 +02:00
parent ff4218981f
commit 8bb77ef741
13 changed files with 182 additions and 94 deletions
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39
main/Extensions/Font.swift
View File

@@ -6,6 +6,7 @@ extension UIFont {
}
func bold() -> UIFont { withTraits(traits: .traitBold) }
func italic() -> UIFont { withTraits(traits: .traitItalic) }
func boldItalic() -> UIFont { withTraits(traits: [.traitBold, .traitItalic]) }
func monoSpace() -> UIFont {
let traits = fontDescriptor.object(forKey: .traits) as? [UIFontDescriptor.TraitKey: Any] ?? [:]
let weight = (traits[.weight] as? CGFloat) ?? UIFont.Weight.regular.rawValue
@@ -13,24 +14,29 @@ extension UIFont {
}
}
extension NSAttributedString {
static func image(_ img: UIImage) -> Self {
extension NSMutableAttributedString {
convenience init(image: UIImage, centered: Bool = false) {
self.init()
let att = NSTextAttachment()
att.image = img
return self.init(attachment: att)
att.image = image
append(.init(attachment: att))
if centered {
let ps = NSMutableParagraphStyle()
ps.alignment = .center
addAttribute(.paragraphStyle, value: ps, range: .init(location: 0, length: length))
}
}
}
extension NSMutableAttributedString {
static private var def: UIFont = .preferredFont(forTextStyle: .body)
@discardableResult func normal(_ str: String, _ style: UIFont.TextStyle = .body) -> Self { append(str, withFont: .preferredFont(forTextStyle: style)) }
@discardableResult func bold(_ str: String, _ style: UIFont.TextStyle = .body) -> Self { append(str, withFont: UIFont.preferredFont(forTextStyle: style).bold()) }
@discardableResult func italic(_ str: String, _ style: UIFont.TextStyle = .body) -> Self { append(str, withFont: UIFont.preferredFont(forTextStyle: style).italic()) }
@discardableResult func boldItalic(_ str: String, _ style: UIFont.TextStyle = .body) -> Self { append(str, withFont: UIFont.preferredFont(forTextStyle: style).boldItalic()) }
func normal(_ str: String, _ style: UIFont.TextStyle = .body) -> Self { append(str, withFont: .preferredFont(forTextStyle: style)) }
func bold(_ str: String, _ style: UIFont.TextStyle = .body) -> Self { append(str, withFont: UIFont.preferredFont(forTextStyle: style).bold()) }
func italic(_ str: String, _ style: UIFont.TextStyle = .body) -> Self { append(str, withFont: UIFont.preferredFont(forTextStyle: style).italic()) }
func h1(_ str: String) -> Self { normal(str, .title1) }
func h2(_ str: String) -> Self { normal(str, .title2) }
func h3(_ str: String) -> Self { normal(str, .title3) }
@discardableResult func h1(_ str: String) -> Self { normal(str, .title1) }
@discardableResult func h2(_ str: String) -> Self { normal(str, .title2) }
@discardableResult func h3(_ str: String) -> Self { normal(str, .title3) }
private func append(_ str: String, withFont: UIFont) -> Self {
append(NSAttributedString(string: str, attributes: [
@@ -39,13 +45,4 @@ extension NSMutableAttributedString {
]))
return self
}
func centered(_ content: NSAttributedString) -> Self {
let before = length
append(content)
let ps = NSMutableParagraphStyle()
ps.alignment = .center
addAttribute(.paragraphStyle, value: ps, range: .init(location: before, length: content.length))
return self
}
}

6
main/Extensions/String.swift
View File

@@ -47,3 +47,9 @@ private var listOfSLDs: [String : [String : Bool]] = {
}
return res
}()
extension NSString {
func substring(from: Int, to: Int) -> String {
substring(with: NSRange(location: from, length: to - from))
}
}