feat: fade launcher list edges beneath bars

2026-10-14 12:27:33 +02:00
parent 3fd9519169
commit f3d173d245
3 changed files with 59 additions and 1 deletions
@@ -0,0 +1,29 @@
+import AppKit
+import Testing
+@testable import Conjure
+
+@Test @MainActor
+func launcherFadesStayAtViewportEdgesAfterScrollingAndResizing() throws {
+    _ = NSApplication.shared
+    let scroll = LauncherScrollView(frame: NSRect(x: 0, y: 0, width: 200, height: 120))
+    scroll.documentView = NSView(frame: NSRect(x: 0, y: 0, width: 200, height: 600))
+    for height in [120, 240] {
+        scroll.frame.size.height = CGFloat(height)
+        scroll.contentView.scroll(to: NSPoint(x: 0, y: 80))
+        scroll.layoutSubtreeIfNeeded()
+        let mask = try #require(scroll.layer?.mask)
+        let context = try #require(CGContext(data: nil, width: 200, height: height,
+            bitsPerComponent: 8, bytesPerRow: 800, space: CGColorSpaceCreateDeviceRGB(),
+            bitmapInfo: CGImageAlphaInfo.premultipliedLast.rawValue))
+        mask.render(in: context)
+        let pixels = try #require(context.data?.assumingMemoryBound(to: UInt8.self))
+        func alpha(_ y: Int) -> UInt8 { pixels[y * 800 + 100 * 4 + 3] }
+        #expect(alpha(0) < 20)
+        #expect(alpha(8) > 80 && alpha(8) < 180)
+        #expect(alpha(20) == 255)
+        #expect(alpha(height / 2) == 255)
+        #expect(alpha(height - 21) == 255)
+        #expect(alpha(height - 9) > 80 && alpha(height - 9) < 180)
+        #expect(alpha(height - 1) < 20)
+    }
+}