Add zoom in/out buttons to macOS

Modules/Legacy/Core/Resources/en.lproj/Localizable.strings

@@ -39,3 +39,12 @@
 "ToolPickerItem.magicToolItem" = "Magic Highlighter";
 // Menu item for the manual highlighter tool
 "ToolPickerItem.manualToolItem" = "Manual Highlighter";
+
+// Label for the zoom in toolbar item
+"ZoomInItem.label" = "Zoom In";
+
+// Label for the zoom toolbar item group
+"ZoomItemGroup.label" = "Zoom";
+
+// Label for the zoom out toolbar item
+"ZoomOutItem.label" = "Zoom Out";

Modules/Legacy/Core/Sources/Desktop/Toolbar Items/Zoom/ZoomInItem.swift

@@ -0,0 +1,24 @@
+//  Created by Geoff Pado on 9/2/25.
+//  Copyright © 2025 Cocoatype, LLC. All rights reserved.
+
+#if targetEnvironment(macCatalyst)
+import Foundation
+
+class ZoomInItem: NSToolbarItem {
+    static let identifier = NSToolbarItem.Identifier("ZoomInItem.identifier")
+    let delegate: ZoomItemDelegate
+
+    init(delegate: ZoomItemDelegate) {
+        self.delegate = delegate
+        super.init(itemIdentifier: Self.identifier)
+
+        image = UIImage(systemName: "plus.magnifyingglass")?
+            .applyingSymbolConfiguration(.init(scale: .large))
+        isBordered = true
+        label = CoreStrings.ZoomInItem.label
+
+        target = delegate
+        action = #selector(ZoomItemDelegate.zoomIn(_:))
+    }
+}
+#endif

Modules/Legacy/Core/Sources/Desktop/Toolbar Items/Zoom/ZoomItemDelegate.swift

@@ -0,0 +1,9 @@
+//  Created by Geoff Pado on 9/2/25.
+//  Copyright © 2025 Cocoatype, LLC. All rights reserved.
+
+#if targetEnvironment(macCatalyst)
+@objc @MainActor protocol ZoomItemDelegate: AnyObject {
+    @objc func zoomIn(_ sender: NSToolbarItem)
+    @objc func zoomOut(_ sender: NSToolbarItem)
+}
+#endif

Modules/Legacy/Core/Sources/Desktop/Toolbar Items/Zoom/ZoomItemGroup.swift

@@ -0,0 +1,23 @@
+//  Created by Geoff Pado on 9/2/25.
+//  Copyright © 2025 Cocoatype, LLC. All rights reserved.
+
+#if targetEnvironment(macCatalyst)
+import Foundation
+
+class ZoomItemGroup: NSToolbarItemGroup {
+    static let identifier = NSToolbarItem.Identifier("ZoomItemGroup.identifier")
+
+    static let zoomStops = [
+        0.05, 0.1, 0.15, 0.2, 0.3, 0.4, 0.5, 0.75, 1.0, 1.5,
+        2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0,
+        12.0, 13.0, 14.0, 15.0, 16.0, 17.0, 18.0, 19.0, 20.0, 21.0,
+        22.0, 23.0, 24.0, 25.0, 26.0, 27.0, 28.0, 29.0, 30.0,
+    ]
+
+    init(delegate: any ZoomItemDelegate) {
+        super.init(itemIdentifier: Self.identifier)
+        label = CoreStrings.ZoomItemGroup.label
+        subitems = [ZoomOutItem(delegate: delegate), ZoomInItem(delegate: delegate)]
+    }
+}
+#endif

Modules/Legacy/Core/Sources/Desktop/Toolbar Items/Zoom/ZoomOutItem.swift

@@ -0,0 +1,24 @@
+//  Created by Geoff Pado on 9/2/25.
+//  Copyright © 2025 Cocoatype, LLC. All rights reserved.
+
+#if targetEnvironment(macCatalyst)
+import Foundation
+
+class ZoomOutItem: NSToolbarItem {
+    static let identifier = NSToolbarItem.Identifier("ZoomOutItem.identifier")
+    let delegate: ZoomItemDelegate
+
+    init(delegate: ZoomItemDelegate) {
+        self.delegate = delegate
+        super.init(itemIdentifier: Self.identifier)
+
+        image = UIImage(systemName: "minus.magnifyingglass")?
+            .applyingSymbolConfiguration(.init(scale: .large))
+        isBordered = true
+        label = CoreStrings.ZoomOutItem.label
+
+        target = delegate
+        action = #selector(ZoomItemDelegate.zoomOut(_:))
+    }
+}
+#endif

Modules/Legacy/Core/Sources/Scene/DesktopSceneDelegate.swift

@@ -14,7 +14,8 @@ import Tools
 import UserActivities
 
 #if targetEnvironment(macCatalyst)
-class DesktopSceneDelegate: NSObject, UIWindowSceneDelegate, NSToolbarDelegate, ShareItemDelegate, ToolPickerItemDelegate, ColorPickerItemDelegate, SeekItemDelegate {
+class DesktopSceneDelegate: NSObject, UIWindowSceneDelegate, NSToolbarDelegate, ShareItemDelegate,
+                            ToolPickerItemDelegate, ColorPickerItemDelegate, SeekItemDelegate, ZoomItemDelegate {
     var window: DesktopAppWindow?
 
     func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
@@ -87,10 +88,31 @@ class DesktopSceneDelegate: NSObject, UIWindowSceneDelegate, NSToolbarDelegate,
         editingViewController?.toggleSeeking(sender)
     }
 
+    // MARK: ZoomItemDelegate
+
+    func zoomIn(_ sender: NSToolbarItem) {
+        guard let editingViewController else { return }
+        let currentScale = editingViewController.zoomScale
+        editingViewController.zoomScale = ZoomItemGroup.zoomStops.first(where: {
+            $0 > currentScale
+        }) ?? ZoomItemGroup.zoomStops.last ?? currentScale
+        print("zoom scale is \(editingViewController.zoomScale)")
+    }
+
+    func zoomOut(_ sender: NSToolbarItem) {
+        guard let editingViewController else { return }
+        let currentScale = editingViewController.zoomScale
+        editingViewController.zoomScale = ZoomItemGroup.zoomStops.reversed().first(where: {
+            $0 < currentScale
+        }) ?? ZoomItemGroup.zoomStops.first ?? currentScale
+        print("zoom scale is \(editingViewController.zoomScale)")
+    }
+
     // MARK: NSToolbarDelegate
 
     func toolbarDefaultItemIdentifiers(_ toolbar: NSToolbar) -> [NSToolbarItem.Identifier] {
         [
+            ZoomItemGroup.identifier,
             SeekItem.identifier,
             ColorPickerItem.identifier,
             ToolPickerItem.identifier,
@@ -108,6 +130,9 @@ class DesktopSceneDelegate: NSObject, UIWindowSceneDelegate, NSToolbarDelegate,
         case ShareItem.identifier: return ShareItem(delegate: self)
         case ColorPickerItem.identifier: return ColorPickerItem(delegate: self)
         case SeekItem.identifier: return SeekItem(delegate: self)
+        case ZoomInItem.identifier: return ZoomInItem(delegate: self)
+        case ZoomOutItem.identifier: return ZoomOutItem(delegate: self)
+        case ZoomItemGroup.identifier: return ZoomItemGroup(delegate: self)
         default: return nil
         }
     }

Modules/Legacy/Editing/Sources/Editing View/PhotoEditingViewController.swift

@@ -466,6 +466,13 @@ public class PhotoEditingViewController: UIViewController, UIScrollViewDelegate,
         return wordObservations + categoryObservations
     }
 
+    // MARK: Zoom
+
+    public var zoomScale: CGFloat {
+        get { photoEditingView.zoomScale }
+        set { photoEditingView.setZoomScale(newValue, animated: true) }
+    }
+
     // MARK: User Activity
 
     open override func updateUserActivityState(_ activity: NSUserActivity) {