Mac: tiny improvement in monitors finding (#254)

Author: BoboTiG

CHANGELOG.md

@@ -4,6 +4,7 @@ See Git checking messages for full history.
 
 ## 8.0.4 (2023/xx/xx)
 - Linux: add failure handling to `XOpenDisplay()` call (fixes #246)
+- Mac: tiny improvement in moniors finding
 - Windows: refactored how internal handles are stored (fixes #198)
 - Windows: removed side effects when leaving the context manager, resources are all freed
 - CI: run tests via xvfb-run on GitHub Actions (#248)

src/mss/darwin.py

@@ -133,14 +133,13 @@ def _monitors_impl(self) -> None:
         display_count = c_uint32(0)
         active_displays = (c_uint32 * self.max_displays)()
         core.CGGetActiveDisplayList(self.max_displays, active_displays, ctypes.byref(display_count))
-        rotations = {0.0: "normal", 90.0: "right", -90.0: "left"}
         for idx in range(display_count.value):
             display = active_displays[idx]
             rect = core.CGDisplayBounds(display)
             rect = core.CGRectStandardize(rect)
             width, height = rect.size.width, rect.size.height
-            rot = core.CGDisplayRotation(display)
-            if rotations[rot] in ["left", "right"]:
+            if core.CGDisplayRotation(display) in {90.0, -90.0}:
+                # {0.0: "normal", 90.0: "right", -90.0: "left"}
                 width, height = height, width
             self._monitors.append(
                 {