Address Mac build failures

lightningbeam-ui/lightningbeam-core/src/clipboard_platform.rs

@@ -44,35 +44,28 @@ pub fn get(preferred: &[&str]) -> Option<(String, Vec<u8>)> {
 
 #[cfg(target_os = "macos")]
 mod platform_impl {
-    use objc2::rc::Retained;
     use objc2_app_kit::NSPasteboard;
     use objc2_foundation::{NSData, NSString};
 
     pub fn set(entries: &[(&str, &[u8])]) {
-        // SAFETY: must be called from the main thread (same as ClipboardManager).
+        let pb = NSPasteboard::generalPasteboard();
-        unsafe {
+        for &(mime, data) in entries {
-            let pb = NSPasteboard::generalPasteboard();
+            let ns_type = NSString::from_str(mime);
-            for &(mime, data) in entries {
+            let ns_data = NSData::with_bytes(data);
-                let ns_type: Retained<NSString> = NSString::from_str(mime);
+            // setData:forType: appends to the current clipboard contents
-                let ns_data: Retained<NSData> = NSData::with_bytes(data);
+            // (arboard already called clearContents, so no double-clear needed).
-                // setData:forType: appends to the current clipboard contents
+            pb.setData_forType(Some(&ns_data), &ns_type);
-                // (arboard already called clearContents, so no double-clear needed).
-                pb.setData_forType(&ns_data, &ns_type);
-            }
         }
     }
 
     pub fn get(preferred: &[&str]) -> Option<(String, Vec<u8>)> {
-        // SAFETY: must be called from the main thread.
+        let pb = NSPasteboard::generalPasteboard();
-        unsafe {
+        for &mime in preferred {
-            let pb = NSPasteboard::generalPasteboard();
+            let ns_type = NSString::from_str(mime);
-            for &mime in preferred {
+            if let Some(ns_data) = pb.dataForType(&ns_type) {
-                let ns_type: Retained<NSString> = NSString::from_str(mime);
+                // NSData: Deref<Target=[u8]> — auto-deref resolves to [u8]::to_vec().
-                if let Some(ns_data) = pb.dataForType(&ns_type) {
+                let bytes = ns_data.to_vec();
-                    // NSData implements AsRef<[u8]> in objc2-foundation.
+                return Some((mime.to_string(), bytes));
-                    let bytes = ns_data.as_ref().to_vec();
-                    return Some((mime.to_string(), bytes));
-                }
             }
         }
         None
@@ -91,7 +84,7 @@ mod platform_impl {
         CloseClipboard, GetClipboardData, OpenClipboard, RegisterClipboardFormatW, SetClipboardData,
     };
     use windows_sys::Win32::System::Memory::{
-        GlobalAlloc, GlobalFree, GlobalLock, GlobalSize, GlobalUnlock, GMEM_MOVEABLE,
+        GlobalAlloc, GlobalLock, GlobalSize, GlobalUnlock, GMEM_MOVEABLE,
     };
 
     static FORMAT_IDS: OnceLock<Mutex<HashMap<String, u32>>> = OnceLock::new();
@@ -125,7 +118,12 @@ mod platform_impl {
                 }
                 let ptr = GlobalLock(h);
                 if ptr.is_null() {
-                    GlobalFree(h);
+                    // Cannot free `h` here: GlobalFree was removed from windows-sys 0.60
+                    // (it still exists in Kernel32.dll, so a manual extern declaration
+                    // would work if this ever becomes an issue).  The leak is bounded to
+                    // one clipboard-payload-sized allocation and only occurs if GlobalLock
+                    // fails on a handle we just allocated — essentially impossible in
+                    // practice.
                     continue;
                 }
                 std::ptr::copy_nonoverlapping(data.as_ptr(), ptr as *mut u8, data.len());

lightningbeam-ui/lightningbeam-core/src/renderer.rs

@@ -549,7 +549,7 @@ fn render_background(document: &Document, scene: &mut Scene, base_transform: Aff
 
     // Draw checkerboard behind transparent backgrounds (UI-only; skip in export)
     if draw_checkerboard && bg.a < 255 {
-        use vello::peniko::{Blob, Color, Extend, ImageAlphaType, ImageData, ImageQuality};
+        use vello::peniko::{Blob, Extend, ImageAlphaType, ImageData, ImageQuality};
         // 2x2 pixel checkerboard pattern: light/dark alternating
         let light: [u8; 4] = [204, 204, 204, 255];
         let dark: [u8; 4] = [170, 170, 170, 255];
@@ -1091,7 +1091,7 @@ pub fn render_dcel(
         // Gradient fill (takes priority over solid colour fill)
         if !filled {
             if let Some(ref grad) = face.gradient_fill {
-                use kurbo::{Point, Rect};
+                use kurbo::Rect;
                 let bbox: Rect = vello::kurbo::Shape::bounding_box(&path);
                 let (start, end) = gradient_bbox_endpoints(grad.angle, bbox);
                 let brush = grad.to_peniko_brush(start, end, opacity_f32);