Center stacked menu bar titles

Sources/CodexBar/MenuBarLayoutRenderer.swift

@@ -91,6 +91,7 @@ final class MenuBarLayoutTitleCache {
 @MainActor
 final class MenuBarLayoutRenderer {
     private static let missingValue = "–"
+    private static let stackedBaselineOffset: CGFloat = -3 // Center multi-line NSStatusBarButton titles.
 
     private struct TokenStyle {
         let font: NSFont
@@ -138,11 +139,14 @@ final class MenuBarLayoutRenderer {
             paragraphStyle.maximumLineHeight = 9.5
             paragraphStyle.lineSpacing = -1
         }
-        let attributes: [NSAttributedString.Key: Any] = [
+        var attributes: [NSAttributedString.Key: Any] = [
             .font: font,
             .foregroundColor: foregroundColor,
             .paragraphStyle: paragraphStyle,
         ]
+        if isStacked {
+            attributes[.baselineOffset] = Self.stackedBaselineOffset
+        }
         let result = NSMutableAttributedString()
         var accessibilityLines: [String] = []
 

Tests/CodexBarTests/MenuBarLayoutRendererTests.swift

@@ -129,6 +129,29 @@ struct MenuBarLayoutRendererTests {
         #expect(bounds.height <= 22)
     }
 
+    @Test
+    func `stacked titles apply a vertical centering offset`() throws {
+        let renderer = MenuBarLayoutRenderer()
+        let stacked = renderer.render(
+            layout: MenuBarLayout(lines: [
+                [.percent(window: .automatic)],
+                [.resetCountdown],
+            ]),
+            data: self.data(),
+            icon: nil,
+            options: self.options())
+        let resetIndex = (stacked.attributedTitle.string as NSString).range(of: "in 2h").location
+        let singleLine = renderer.render(
+            layout: MenuBarLayout(lines: [[.percent(window: .automatic), .resetCountdown]]),
+            data: self.data(),
+            icon: nil,
+            options: self.options())
+
+        #expect(try #require(self.baselineOffset(in: stacked.attributedTitle, at: 0)) == -3)
+        #expect(try #require(self.baselineOffset(in: stacked.attributedTitle, at: resetIndex)) == -3)
+        #expect(self.baselineOffset(in: singleLine.attributedTitle, at: 0) == nil)
+    }
+
     @Test
     func `two line icon uses compact paragraph metrics`() {
         let renderer = MenuBarLayoutRenderer()
@@ -303,4 +326,15 @@ struct MenuBarLayoutRendererTests {
         }
         return try totalBrightness / CGFloat(#require(visiblePixelCount > 0 ? visiblePixelCount : nil))
     }
+
+    private func baselineOffset(in title: NSAttributedString, at index: Int) -> CGFloat? {
+        let value = title.attribute(.baselineOffset, at: index, effectiveRange: nil)
+        if let value = value as? CGFloat {
+            return value
+        }
+        if let value = value as? NSNumber {
+            return CGFloat(truncating: value)
+        }
+        return nil
+    }
 }