From a251fe18fedfe7d20708f3a59c07467e19b350dc Mon Sep 17 00:00:00 2001
From: Dan Barber <github@danbarber.me>
Date: Tue, 12 Feb 2019 22:43:38 -0500
Subject: [PATCH] Change colour of borders depending on dark/light mode

---
 Persephone/Views/AlbumItem.swift | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/Persephone/Views/AlbumItem.swift b/Persephone/Views/AlbumItem.swift
index eadd9de..b9f4071 100644
--- a/Persephone/Views/AlbumItem.swift
+++ b/Persephone/Views/AlbumItem.swift
@@ -9,7 +9,9 @@
 import Cocoa
 
 class AlbumItem: NSCollectionViewItem {
-  let albumCoverBorderColor = NSColor.init(calibratedWhite: 1, alpha: 0.1)
+  let borderColorLight = NSColor.black.withAlphaComponent(0.1).cgColor
+  let borderColorDark = NSColor.white.withAlphaComponent(0.1).cgColor
+  var observer: NSKeyValueObservation?
 
   override func viewDidLoad() {
     super.viewDidLoad()
@@ -18,7 +20,13 @@ class AlbumItem: NSCollectionViewItem {
     albumCoverView.wantsLayer = true
     albumCoverView.layer?.cornerRadius = 3
     albumCoverView.layer?.borderWidth = 1
-    albumCoverView.layer?.borderColor = albumCoverBorderColor.cgColor
+    setAppearance()
+
+    if #available(OSX 10.14, *) {
+      observer = NSApp.observe(\.effectiveAppearance) { (app, _) in
+        self.setAppearance()
+      }
+    }
   }
 
   func setAlbum(_ album: MPDClient.Album) {
@@ -26,6 +34,17 @@ class AlbumItem: NSCollectionViewItem {
     albumArtist.stringValue = album.artist
   }
 
+  func setAppearance() {
+    if #available(OSX 10.14, *) {
+      let darkMode = NSApp.effectiveAppearance.bestMatch(from:
+        [.darkAqua, .aqua]) == .darkAqua
+
+      albumCoverView.layer?.borderColor = darkMode ? borderColorDark : borderColorLight
+    } else {
+      albumCoverView.layer?.borderColor = borderColorLight
+    }
+  }
+
   @IBOutlet var albumCoverView: NSImageView!
   @IBOutlet var albumTitle: NSTextField!
   @IBOutlet var albumArtist: NSTextField!