Support typographicBounds in demo

PathText/Sources/PathText/LayoutManager.swift

@@ -22,6 +22,11 @@ struct PathTextLayoutManager {
         }
     }
 
+    public var typographicBounds: CGRect {
+        // FIXME: ensureLayout? Maybe pre-calculate this?
+        glyphRuns.reduce(.null) { $0.union($1.typographicBounds) }
+    }
+
     mutating func ensureGlyphs() {
         if needsGlyphGeneration { updateGlyphRuns() }
     }

PathText/Sources/PathText/UIKit.swift

@@ -59,5 +59,10 @@ public class PathTextView: UIView {
         context.textMatrix = CGAffineTransform(scaleX: 1, y: -1)
         layoutManager.draw(in: context)
     }
+
+    public var typographicBounds: CGRect {
+        layoutManager.ensureLayout()
+        return layoutManager.typographicBounds
+    }
 }
 #endif

PathTextDemo/ViewController.swift

@@ -53,7 +53,7 @@ class ViewController: UIViewController {
         var tightFrame = frame
         tightFrame.origin.y = 400
         let tightTextView = PathTextView(frame: tightFrame, text: text, path: path)
-        tightTextView.sizeToFit()
+        tightTextView.bounds = tightTextView.typographicBounds
         tightTextView.layer.borderColor = UIColor.red.cgColor
         tightTextView.layer.borderWidth = 1
         view.addSubview(tightTextView)