feat: Updating text style modifiers

Sources/CliDocCore/Modifiers/TextStyle.swift

@@ -0,0 +1,124 @@
+import Rainbow
+
+public extension TextNode {
+
+  @inlinable
+  func color(_ color: NamedColor) -> some TextNode {
+    textStyle(.color(color))
+  }
+
+  @inlinable
+  func color(_ bit8: UInt8) -> some TextNode {
+    textStyle(.color(bit8: bit8))
+  }
+
+  @inlinable
+  func color(red: UInt8, green: UInt8, blue: UInt8) -> some TextNode {
+    textStyle(.color(rgb: (red, green, blue)))
+  }
+
+  @inlinable
+  func textStyle<S: TextStyle>(_ styles: S...) -> some TextNode {
+    styles.reduce(render()) { string, style in
+      style.render(content: string).render()
+    }
+  }
+
+  @inlinable
+  func bold() -> some TextNode { textStyle(.bold) }
+
+  @inlinable
+  func dim() -> some TextNode { textStyle(.dim) }
+
+  @inlinable
+  func italic() -> some TextNode { textStyle(.italic) }
+
+  @inlinable
+  func underline() -> some TextNode { textStyle(.underline) }
+
+  @inlinable
+  func blink() -> some TextNode { textStyle(.blink) }
+
+  @inlinable
+  func strikeThrough() -> some TextNode { textStyle(.strikeThrough) }
+
+}
+
+// TODO: Remove string restraint.
+public protocol TextStyle: NodeModifier where Content == String {}
+
+public extension TextStyle where Self == StyledText {
+  @inlinable
+  static var bold: Self { .init(.bold) }
+
+  @inlinable
+  static var dim: Self { .init(.dim) }
+
+  @inlinable
+  static var italic: Self { .init(.italic) }
+
+  @inlinable
+  static var underline: Self { .init(.underline) }
+
+  @inlinable
+  static var blink: Self { .init(.blink) }
+
+  @inlinable
+  static var swap: Self { .init(.swap) }
+
+  @inlinable
+  static var strikeThrough: Self { .init(.strikethrough) }
+}
+
+public extension TextStyle where Self == ColorTextStyle {
+
+  @inlinable
+  static func color(_ name: NamedColor) -> Self {
+    .init(.named(name))
+  }
+
+  @inlinable
+  static func color(bit8: UInt8) -> Self {
+    .init(.bit8(bit8))
+  }
+
+  @inlinable
+  static func color(rgb: RGB) -> Self {
+    .init(.bit24(rgb))
+  }
+}
+
+public struct ColorTextStyle: TextStyle {
+  enum Location {
+    case foreground(ColorType)
+    case background(ColorType)
+  }
+
+  @usableFromInline
+  let color: ColorType
+
+  @usableFromInline
+  init(_ color: ColorType) {
+    self.color = color
+  }
+
+  @inlinable
+  public func render(content: String) -> some TextNode {
+    content.applyingColor(color)
+  }
+}
+
+public struct StyledText: TextStyle {
+  @usableFromInline
+  let style: Style
+
+  @usableFromInline
+  init(_ style: Style) {
+    self.style = style
+  }
+
+  @inlinable
+  public func render(content: String) -> some TextNode {
+    content.applyingStyle(style)
+  }
+}