feat: add anti aliasing support for thumbnails

resources/l10n/Localizable.strings

@@ -1,4 +1,4 @@
-/* No comment provided by engineer. */
+/* No comment provided by engineer. */
 "About" = "About";
 
 /* Menubar option. %@ is AltTab */
@@ -310,6 +310,9 @@
 /* No comment provided by engineer. */
 "This permission is needed to show screenshots and titles of open windows" = "This permission is needed to show screenshots and titles of open windows";
 
+/* No comment provided by engineer. */
+"Thumbnail Anti Aliasing:" = "Thumbnail Anti Aliasing:";
+
 /* No comment provided by engineer. */
 "Updates policy:" = "Updates policy:";
 

resources/l10n/ar.lproj/Localizable.strings

@@ -338,6 +338,9 @@
 /*No comment provided by engineer.*/
 "This permission is needed to show screenshots and titles of open windows" = "This permission is needed to show screenshots and titles of open windows";
 
+/* No comment provided by engineer. */
+"Thumbnail Anti Aliasing:" = "إخفاء النوافذ المصغرة:";
+
 /*No comment provided by engineer.*/
 "Updates policy:" = "سياسة التحديثات:";
 

resources/l10n/de.lproj/Localizable.strings

@@ -338,6 +338,9 @@
 /*No comment provided by engineer.*/
 "This permission is needed to show screenshots and titles of open windows" = "Diese Erlaubnis is nötig um Bildschirmaufnahmen und Titel offener Fenster anzuzeigen";
 
+/* No comment provided by engineer. */
+"Thumbnail Anti Aliasing:" = "Fenster-Miniaturansichten ausblenden:";
+
 /*No comment provided by engineer.*/
 "Updates policy:" = "Update Richtlinie:";
 

resources/l10n/en.lproj/Localizable.strings

@@ -338,6 +338,9 @@
 /*No comment provided by engineer.*/
 "This permission is needed to show screenshots and titles of open windows" = "This permission is needed to show screenshots and titles of open windows";
 
+/* No comment provided by engineer. */
+"Thumbnail Anti Aliasing:" = "Thumbnail Anti Aliasing:";
+
 /*No comment provided by engineer.*/
 "Updates policy:" = "Updates policy:";
 

resources/l10n/es.lproj/Localizable.strings

@@ -338,6 +338,9 @@
 /*No comment provided by engineer.*/
 "This permission is needed to show screenshots and titles of open windows" = "Este permiso es necesario para mostrar capturas de pantalla y títulos de ventanas abiertas";
 
+/* No comment provided by engineer. */
+"Thumbnail Anti Aliasing:" = "Ocultar miniaturas de ventana:";
+
 /*No comment provided by engineer.*/
 "Updates policy:" = "Política de actualizaciones:";
 

resources/l10n/fi.lproj/Localizable.strings

@@ -338,6 +338,9 @@
 /*No comment provided by engineer.*/
 "This permission is needed to show screenshots and titles of open windows" = "Tarvitaan ikkunoiden otsikoiden ja pikkukuvien näyttämiseen";
 
+/* No comment provided by engineer. */
+"Thumbnail Anti Aliasing:" = "Piilota ikkunan pikkukuvat:";
+
 /*No comment provided by engineer.*/
 "Updates policy:" = "Päivityspolitiikka:";
 

resources/l10n/fr.lproj/Localizable.strings

@@ -338,6 +338,9 @@
 /*No comment provided by engineer.*/
 "This permission is needed to show screenshots and titles of open windows" = "Cette permission est nécessaire pour afficher les miniatures et titres des fenêtres ouvertes";
 
+/* No comment provided by engineer. */
+"Thumbnail Anti Aliasing:" = "Masquer les miniatures de fenêtre:";
+
 /*No comment provided by engineer.*/
 "Updates policy:" = "Politique de mise-à-jour :";
 

resources/l10n/hu.lproj/Localizable.strings

@@ -338,6 +338,9 @@
 /*No comment provided by engineer.*/
 "This permission is needed to show screenshots and titles of open windows" = "Ez a jogosultság ahhoz szükséges hogy megjeleníthessük a képernyőképeket és csempéket a nyitott ablakokhoz";
 
+/* No comment provided by engineer. */
+"Thumbnail Anti Aliasing:" = "Az ablak miniatűrjeinek elrejtése:";
+
 /*No comment provided by engineer.*/
 "Updates policy:" = "Frissítési beállítások:";
 

resources/l10n/id.lproj/Localizable.strings

@@ -338,6 +338,9 @@
 /*No comment provided by engineer.*/
 "This permission is needed to show screenshots and titles of open windows" = "Izin ini diperlukan untuk menampilkan tangkapan layar dan judul jendela yang terbuka";
 
+/* No comment provided by engineer. */
+"Thumbnail Anti Aliasing:" = "Sembunyikan thumbnail jendela:";
+
 /*No comment provided by engineer.*/
 "Updates policy:" = "Kebijakan pembaruan:";
 

resources/l10n/it.lproj/Localizable.strings

@@ -338,6 +338,9 @@
 /*No comment provided by engineer.*/
 "This permission is needed to show screenshots and titles of open windows" = "This permission is needed to show screenshots and titles of open windows";
 
+/* No comment provided by engineer. */
+"Thumbnail Anti Aliasing:" = "Nascondi le miniature delle finestre:";
+
 /*No comment provided by engineer.*/
 "Updates policy:" = "Politica sugli aggiornamenti:";
 

resources/l10n/ja.lproj/Localizable.strings

@@ -338,6 +338,9 @@
 /*No comment provided by engineer.*/
 "This permission is needed to show screenshots and titles of open windows" = "こちらの許可は、スクリーンショットと開いているウィンドウを表示するのに必要です。";
 
+/* No comment provided by engineer. */
+"Thumbnail Anti Aliasing:" = "ウィンドウのサムネイルを非表示にする:";
+
 /*No comment provided by engineer.*/
 "Updates policy:" = "アップデートポリシー：";
 

resources/l10n/ko.lproj/Localizable.strings

@@ -338,6 +338,9 @@
 /*No comment provided by engineer.*/
 "This permission is needed to show screenshots and titles of open windows" = "이 권한은 윈도우의 이미지와 제목을 띄울 수 있게 해줍니다";
 
+/* No comment provided by engineer. */
+"Thumbnail Anti Aliasing:" = "창 축소판 숨기기:";
+
 /*No comment provided by engineer.*/
 "Updates policy:" = "업데이트 방법:";
 

resources/l10n/nl.lproj/Localizable.strings

@@ -338,6 +338,9 @@
 /*No comment provided by engineer.*/
 "This permission is needed to show screenshots and titles of open windows" = "Deze permissie is nodig om screenshots en titels van geopende vensters te tonen";
 
+/* No comment provided by engineer. */
+"Thumbnail Anti Aliasing:" = "Verberg vensterminiaturen:";
+
 /*No comment provided by engineer.*/
 "Updates policy:" = "Updatebeleid:";
 

resources/l10n/no.lproj/Localizable.strings

@@ -338,6 +338,9 @@
 /*No comment provided by engineer.*/
 "This permission is needed to show screenshots and titles of open windows" = "Denne tillatelsen er nødvendig for å kunne vise skjermbilde og tittel på åpne vinduer";
 
+/* No comment provided by engineer. */
+"Thumbnail Anti Aliasing:" = "Skjul miniatyrbilder av vinduer:";
+
 /*No comment provided by engineer.*/
 "Updates policy:" = "Oppdateringspolicy:";
 

resources/l10n/pl.lproj/Localizable.strings

@@ -339,6 +339,9 @@
 /*No comment provided by engineer.*/
 "This permission is needed to show screenshots and titles of open windows" = "To uprawnienie jest potrzebne do wyświetlania zrzutów ekranu i tytułów otwartych okien";
 
+/* No comment provided by engineer. */
+"Thumbnail Anti Aliasing:" = "Ukryj miniatury okien:";
+
 /*No comment provided by engineer.*/
 "Updates policy:" = "Zasady aktualizacji:";
 

resources/l10n/pt-BR.lproj/Localizable.strings

@@ -338,6 +338,9 @@
 /*No comment provided by engineer.*/
 "This permission is needed to show screenshots and titles of open windows" = "Esta permissão é necessária para exibir pré-visualizações e títulos das janelas abertas";
 
+/* No comment provided by engineer. */
+"Thumbnail Anti Aliasing:" = "Ocultar miniaturas de janela:";
+
 /*No comment provided by engineer.*/
 "Updates policy:" = "Política de atualizações:";
 

resources/l10n/pt.lproj/Localizable.strings

@@ -338,6 +338,9 @@
 /*No comment provided by engineer.*/
 "This permission is needed to show screenshots and titles of open windows" = "Esta permissão é necessária para mostrar capturas de ecrã e títulos das janelas abertas";
 
+/* No comment provided by engineer. */
+"Thumbnail Anti Aliasing:" = "Ocultar miniaturas de janela:";
+
 /*No comment provided by engineer.*/
 "Updates policy:" = "Regras de actualização:";
 

resources/l10n/ru.lproj/Localizable.strings

@@ -338,6 +338,9 @@
 /*No comment provided by engineer.*/
 "This permission is needed to show screenshots and titles of open windows" = "Это разрешение нужно для показа скриншотов и заголовков открытых окон";
 
+/* No comment provided by engineer. */
+"Thumbnail Anti Aliasing:" = "Скрыть эскизы окон:";
+
 /*No comment provided by engineer.*/
 "Updates policy:" = "Правило обновлений:";
 

resources/l10n/sk.lproj/Localizable.strings

@@ -338,6 +338,9 @@
 /*No comment provided by engineer.*/
 "This permission is needed to show screenshots and titles of open windows" = "Toto povolenie je potrebné na zobrazovanie snímok obrazovky a názvov otvorených okien";
 
+/* No comment provided by engineer. */
+"Thumbnail Anti Aliasing:" = "Skryť miniatúry okien:";
+
 /*No comment provided by engineer.*/
 "Updates policy:" = "Pravidlá aktualizácií:";
 

resources/l10n/sl.lproj/Localizable.strings

@@ -338,6 +338,9 @@
 /*No comment provided by engineer.*/
 "This permission is needed to show screenshots and titles of open windows" = "This permission is needed to show screenshots and titles of open windows";
 
+/* No comment provided by engineer. */
+"Thumbnail Anti Aliasing:" = "Skrij sličice oken:";
+
 /*No comment provided by engineer.*/
 "Updates policy:" = "Politika posodobitev:";
 

resources/l10n/tr.lproj/Localizable.strings

@@ -338,6 +338,9 @@
 /*No comment provided by engineer.*/
 "This permission is needed to show screenshots and titles of open windows" = "This permission is needed to show screenshots and titles of open windows";
 
+/* No comment provided by engineer. */
+"Thumbnail Anti Aliasing:" = "Pencere küçük resimlerini gizle:";
+
 /*No comment provided by engineer.*/
 "Updates policy:" = "Güncelleme politikası:";
 

resources/l10n/zh-CN.lproj/Localizable.strings

@@ -338,6 +338,9 @@
 /*No comment provided by engineer.*/
 "This permission is needed to show screenshots and titles of open windows" = "需要此权限以显示窗口截屏与标题";
 
+/* No comment provided by engineer. */
+"Thumbnail Anti Aliasing:" = "使用抗锯齿缩略图:";
+
 /*No comment provided by engineer.*/
 "Updates policy:" = "更新方式：";
 

resources/l10n/zh-TW.lproj/Localizable.strings

@@ -338,6 +338,9 @@
 /*No comment provided by engineer.*/
 "This permission is needed to show screenshots and titles of open windows" = "需要取得此權限，才能顯示打開視窗的截圖與標題資訊";
 
+/* No comment provided by engineer. */
+"Thumbnail Anti Aliasing:" = "隱藏視窗縮圖:";
+
 /*No comment provided by engineer.*/
 "Updates policy:" = "更新策略：";
 

src/api-wrappers/HelperExtensions.swift

@@ -122,6 +122,15 @@ extension NSViewController {
 }
 
 extension NSImage {
+    func resizeToCopy(newSize: NSSize, interpolation : NSImageInterpolation = .default) -> NSImage {
+        let img = NSImage(size: newSize)
+        img.lockFocus()
+        NSGraphicsContext.current?.imageInterpolation = interpolation
+        draw(in: NSMakeRect(0, 0, newSize.width, newSize.height), from: NSMakeRect(0, 0, size.width, size.height), operation: .copy, fraction: 1)
+        img.unlockFocus()
+        return img
+    }
+
     // NSImage(named) caches/reuses NSImage objects; we force separate instances of images by using copy()
     static func initCopy(_ name: String) -> NSImage {
         return NSImage(named: name)!.copy() as! NSImage
@@ -136,12 +145,7 @@ extension NSImage {
     // copy and resize an image using high quality interpolation
     static func initResizedCopy(_ name: String, _ width: CGFloat, _ height: CGFloat) -> NSImage {
         let original = initCopy(name)
-        let img = NSImage(size: CGSize(width: width, height: height))
-        img.lockFocus()
-        NSGraphicsContext.current?.imageInterpolation = .high
-        original.draw(in: NSMakeRect(0, 0, width, height), from: NSMakeRect(0, 0, original.size.width, original.size.height), operation: .copy, fraction: 1)
-        img.unlockFocus()
-        return img
+        return original.resizeToCopy(newSize: CGSize(width: width, height: height), interpolation: .high)
     }
 
     func tinted(_ tint: NSColor) -> NSImage {

src/logic/Preferences.swift

@@ -61,6 +61,7 @@ class Preferences {
         "hideAppBadges": "false",
         "hideWindowlessApps": "false",
         "hideThumbnails": "false",
+        "thumbnailAntiAliasing": ThumbnailAntiAliasingPreference.none.rawValue,
     ]
 
     // constant values
@@ -119,6 +120,7 @@ class Preferences {
     static var showFullscreenWindows: [ShowHowPreference] { ["showFullscreenWindows", "showFullscreenWindows2"].map { defaults.macroPref($0, ShowHowPreference.allCases) } }
     static var shortcutStyle: [ShortcutStylePreference] { ["shortcutStyle", "shortcutStyle2"].map { defaults.macroPref($0, ShortcutStylePreference.allCases) } }
     static var menubarIcon: MenubarIconPreference { defaults.macroPref("menubarIcon", MenubarIconPreference.allCases) }
+    static var thumbnailAntiAliasing: ThumbnailAntiAliasingPreference { defaults.macroPref("thumbnailAntiAliasing", ThumbnailAntiAliasingPreference.allCases) }
 
     // derived values
     static var cellBorderWidth: CGFloat { theme.themeParameters.cellBorderWidth }
@@ -390,6 +392,22 @@ enum AlignThumbnailsPreference: String, CaseIterable, MacroPreference {
     }
 }
 
+enum ThumbnailAntiAliasingPreference: String, CaseIterable, MacroPreference {
+    case none = "0"
+    case low = "1"
+    case medium = "2"
+    case high = "3"
+
+    var localizedString: LocalizedString {
+        switch self {
+            case .none: return NSLocalizedString("None", comment: "")
+            case .low: return NSLocalizedString("Low", comment: "")
+            case .medium: return NSLocalizedString("Medium", comment: "")
+            case .high: return NSLocalizedString("High", comment: "")
+        }
+    }
+}
+
 enum ThemePreference: String, CaseIterable, MacroPreference {
     case macOs = "0"
     case windows10 = "1"

src/logic/Windows.swift

@@ -167,12 +167,7 @@ class Windows {
                     window.refreshThumbnail()
                     DispatchQueue.main.async {
                         let view = ThumbnailsView.recycledViews[currentIndex]
-                        if view.thumbnail.image != window.thumbnail {
-                            let oldSize = view.thumbnail.frame.size
-                            view.thumbnail.image = window.thumbnail
-                            view.thumbnail.image?.size = oldSize
-                            view.thumbnail.frame.size = oldSize
-                        }
+                        view.updateThumbnailIfNeeded(window.thumbnail)
                     }
                 }
                 refreshThumbnailsAsync(screen, currentIndex + 1)

src/ui/main-window/ThumbnailView.swift

@@ -3,6 +3,7 @@ import Cocoa
 class ThumbnailView: NSStackView {
     var window_: Window?
     var thumbnail = NSImageView()
+    var thumbnailRaw = NSImage?(nil)
     var appIcon = NSImageView()
     var label = ThumbnailTitleView(Preferences.fontHeight)
     var fullscreenIcon = ThumbnailFontIconView(.circledPlusSign)
@@ -97,18 +98,43 @@ class ThumbnailView: NSStackView {
         edgeInsets.left = edgeInsets_
     }
 
+    private func getThumbnailInterpolationLevel() -> NSImageInterpolation {
+        if Preferences.thumbnailAntiAliasing == .high {
+            return .high
+        }
+        if Preferences.thumbnailAntiAliasing == .medium {
+            return .medium
+        }
+        if Preferences.thumbnailAntiAliasing == .low {
+            return .low
+        }
+        return .none
+    }
+
+    func updateThumbnailIfNeeded(_ image: NSImage?)
+    {
+        if thumbnailRaw != image {
+            let effectSize = thumbnail.frame.size
+            thumbnailRaw = image
+            let thumbnailAntiAliasing = getThumbnailInterpolationLevel()
+            if thumbnailAntiAliasing == .none {
+                thumbnail.image = image
+                thumbnail.image?.size = effectSize
+                thumbnail.setFrameSize(effectSize)
+            } else {
+                thumbnail.image = thumbnailRaw?.resizeToCopy(newSize: effectSize, interpolation: thumbnailAntiAliasing)
+            }
+        }
+    }
+
     func updateRecycledCellWithNewContent(_ element: Window, _ index: Int, _ newHeight: CGFloat, _ screen: NSScreen) {
         window_ = element
         assignIfDifferent(&thumbnail.isHidden, Preferences.hideThumbnails)
         if !Preferences.hideThumbnails {
-            thumbnail.image = element.thumbnail
-            if let image = thumbnail.image {
-                image.size = element.thumbnailFullSize!
-            }
             let (thumbnailWidth, thumbnailHeight) = ThumbnailView.thumbnailSize(element.thumbnail, screen)
             let thumbnailSize = NSSize(width: thumbnailWidth.rounded(), height: thumbnailHeight.rounded())
-            thumbnail.image?.size = thumbnailSize
             thumbnail.frame.size = thumbnailSize
+            updateThumbnailIfNeeded(element.thumbnail)
         }
         assignIfDifferent(&spacing, Preferences.hideThumbnails ? 0 : Preferences.intraCellPadding)
         assignIfDifferent(&hStackView.spacing, Preferences.fontHeight == 0 ? 0 : Preferences.intraCellPadding)

src/ui/preferences-window/tabs/AppearanceTab.swift

@@ -16,6 +16,7 @@ class AppearanceTab {
             LabelAndControl.makeLabelWithSlider(NSLocalizedString("Max width on screen:", comment: ""), "maxWidthOnScreen", 10, 100, 10, true, "%"),
             LabelAndControl.makeLabelWithSlider(NSLocalizedString("Max height on screen:", comment: ""), "maxHeightOnScreen", 10, 100, 10, true, "%"),
             LabelAndControl.makeLabelWithCheckbox(NSLocalizedString("Hide window thumbnails:", comment: ""), "hideThumbnails", extraAction: { _ in toggleRowsCount() }),
+            LabelAndControl.makeLabelWithDropdown(NSLocalizedString("Thumbnail Anti Aliasing:", comment: ""), "thumbnailAntiAliasing", ThumbnailAntiAliasingPreference.allCases),
             rowsCount,
             minWidthInRow,
             maxWidthInRow,