Support Math rendering1.2.0

1 files changed, 46 insertions, 0 deletions

diff --git a/Sources/NorgUI/Math/NorgMathRenderer.swift b/Sources/NorgUI/Math/NorgMathRenderer.swift
new file mode 100644
index 0000000..4fcf60f
--- /dev/null
+++ b/Sources/NorgUI/Math/NorgMathRenderer.swift
@@ -0,0 +1,46 @@
+import SwiftUI
+
+#if canImport(UIKit)
+  import UIKit
+  public typealias PlatformImage = UIImage
+#elseif canImport(AppKit)
+  import AppKit
+  public typealias PlatformImage = NSImage
+#endif
+
+public enum NorgMathMode: Sendable {
+  case inline
+  case block
+}
+
+public struct NorgMathImage {
+  public let image: PlatformImage
+  public let size: CGSize
+  public let descent: CGFloat
+
+  public init(image: PlatformImage, size: CGSize, descent: CGFloat) {
+    self.image = image
+    self.size = size
+    self.descent = descent
+  }
+
+  public var swiftUIImage: Image {
+    #if canImport(UIKit)
+      Image(uiImage: image)
+    #elseif canImport(AppKit)
+      Image(nsImage: image)
+    #endif
+  }
+}
+
+/// Renders LaTeX-style math into an image for display.
+public protocol NorgMathRenderer: Sendable {
+  /// Render `latex` at the given point size and colour.
+  ///
+  /// - Returns: the rendered image, or `nil` if the input could not be
+  ///   rendered (the caller then keeps its text fallback).
+  @MainActor
+  func render(
+    latex: String, mode: NorgMathMode, fontSize: CGFloat, color: Color?
+  ) async -> NorgMathImage?
+}