Support .cursor attribute

krzyzanowskim · May 18, 2024 · cdc0d3e · cdc0d3e
1 parent 13d8b8b
commit cdc0d3e
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Showing 2 changed files with 38 additions and 4 deletions.
diff --git a/Package.swift b/Package.swift
@@ -12,7 +12,7 @@ let package = Package(
         )
     ],
     dependencies: [
-        .package(url: "/~https://github.com/krzyzanowskim/STTextKitPlus", from: "0.0.2")
+        .package(url: "/~https://github.com/krzyzanowskim/STTextKitPlus", from: "0.1.1")
     ],
     targets: [
         .target(

diff --git a/Sources/STTextView/STTextView.swift b/Sources/STTextView/STTextView.swift
@@ -657,9 +657,43 @@ import AVFoundation
         if isSelectable, visibleRect != .zero {
             addCursorRect(visibleRect, cursor: .iBeam)
 
-            // TODO: NSAttributedString.Key.cursor attribute
-            // TODO: .pointingHand for .link attribute rectangles
-            // addCursorRect(visibleRect, cursor: .pointingHand)
+            // This iteration may be performance intensive. I think it can be debounced without
+            // affecting the correctness
+            if let viewportRange = textLayoutManager.textViewportLayoutController.viewportRange,
+               let viewportAttributedString = textContentManager.attributedString(in: viewportRange)
+            {
+                viewportAttributedString.enumerateAttribute(.link, in: viewportAttributedString.range, options: .longestEffectiveRangeNotRequired) { attributeValue, attributeRange, stop in
+                    guard attributeValue != nil else {
+                        return
+                    }
+
+                    if let startLocation = textLayoutManager.location(viewportRange.location, offsetBy: attributeRange.location),
+                       let endLocation = textLayoutManager.location(startLocation, offsetBy: attributeRange.length),
+                       let linkTextRange = NSTextRange(location: startLocation, end: endLocation),
+                       let linkTypographicBounds = textLayoutManager.typographicBounds(in: linkTextRange)
+                    {
+                        addCursorRect(linkTypographicBounds, cursor: .pointingHand)
+                    } else {
+                        stop.pointee = true
+                    }
+                }
+
+                viewportAttributedString.enumerateAttribute(.cursor, in: viewportAttributedString.range, options: .longestEffectiveRangeNotRequired) { attributeValue, attributeRange, stop in
+                    guard let cursorValue = attributeValue as? NSCursor else {
+                        return
+                    }
+
+                    if let startLocation = textLayoutManager.location(viewportRange.location, offsetBy: attributeRange.location),
+                       let endLocation = textLayoutManager.location(startLocation, offsetBy: attributeRange.length),
+                       let linkTextRange = NSTextRange(location: startLocation, end: endLocation),
+                       let linkTypographicBounds = textLayoutManager.typographicBounds(in: linkTextRange)
+                    {
+                        addCursorRect(linkTypographicBounds, cursor: cursorValue)
+                    } else {
+                        stop.pointee = true
+                    }
+                }
+            }
         }
     }