feat: AttributedString initializer based on SwiftUI Font.

laosb · Feb 23, 2024 · 9053844 · 9053844
1 parent 6eeb716
commit 9053844
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Showing 2 changed files with 42 additions and 0 deletions.
diff --git a/Sources/EasyRichText/ERTFontUtils.swift b/Sources/EasyRichText/ERTFontUtils.swift
@@ -6,6 +6,9 @@
 //
 
 import Foundation
+#if canImport(SwiftUI)
+import SwiftUI
+#endif
 #if canImport(AppKit)
 import AppKit
 #elseif canImport(UIKit)
@@ -52,4 +55,30 @@ public struct ERTFontUtils {
  return self.font(font, with: traits)
  }
  #endif
+
+ #if canImport(SwiftUI)
+ #if canImport(UIKit)
+ public func uiFont(from font: Font) -> UIFont? {
+ var attributedString = AttributedString()
+ attributedString.swiftUI.font = font
+ let nsAttributedString = NSAttributedString(attributedString)
+ let font = nsAttributedString.attribute(.font, at: 0, effectiveRange: nil) as? UIFont
+ return font
+ }
+ public func ctFont(from font: Font) -> CTFont? {
+ uiFont(from: font) as CTFont?
+ }
+ #elseif canImport(AppKit)
+ public func nsFont(from font: Font) -> NSFont? {
+ var attributedString = AttributedString()
+ attributedString.swiftUI.font = font
+ let nsAttributedString = NSAttributedString(attributedString)
+ let font = nsAttributedString.attribute(.font, at: 0, effectiveRange: nil) as? NSFont
+ return font
+ }
+ public func ctFont(from font: Font) -> CTFont? {
+ nsFont(from: font) as CTFont?
+ }
+ #endif
+ #endif
 }
diff --git a/Sources/EasyRichText/Models/ERTRichText.swift b/Sources/EasyRichText/Models/ERTRichText.swift
@@ -43,6 +43,19 @@ public extension ERTRichText {
  self.segments = [.init(text: string)]
  }
 
+ func attributedString(defaultFont: CTFont) -> AttributedString {
+ segments.map { $0.attributedString(defaultFont: defaultFont) }.reduce(AttributedString(), +)
+ }
+ func attributedString(defaultFont: Font) -> AttributedString {
+ let ctFont = ERTFontUtils.default.ctFont(from: defaultFont)
+ #if canImport(AppKit)
+ let fallbackFont = NSFont.preferredFont(forTextStyle: .body)
+ #elseif canImport(UIKit)
+ let fallbackFont = UIFont.preferredFont(forTextStyle: .body)
+ #endif
+ return attributedString(defaultFont: ctFont ?? fallbackFont)
+ }
+
  func nsAttributedString(defaultFont: CTFont) -> NSAttributedString {
  ERTAttributedStringBridge.default.nsAttributedString(for: attributedString(defaultFont: defaultFont))
  }