feat: implement toggleMaximize for macOS (#7191)

Resolve #7030

macos/Sources/Features/Command Palette/TerminalCommandPalette.swift

@@ -29,7 +29,6 @@ struct TerminalCommandPaletteView: View {
             let key = String(cString: c.action_key)
             switch (key) {
             case "toggle_tab_overview",
-                 "toggle_maximize",
                 "toggle_window_decorations":
                 return false
             default:

macos/Sources/Features/Terminal/BaseTerminalController.swift

@@ -115,6 +115,11 @@ class BaseTerminalController: NSWindowController,
             selector: #selector(ghosttyCommandPaletteDidToggle(_:)),
             name: .ghosttyCommandPaletteDidToggle,
             object: nil)
+        center.addObserver(
+            self,
+            selector: #selector(ghosttyMaximizeDidToggle(_:)),
+            name: .ghosttyMaximizeDidToggle,
+            object: nil)
 
         // Listen for local events that we need to know of outside of
         // single surface handlers.
@@ -234,6 +239,13 @@ class BaseTerminalController: NSWindowController,
         toggleCommandPalette(nil)
     }
 
+    @objc private func ghosttyMaximizeDidToggle(_ notification: Notification) {
+        guard let window else { return }
+        guard let surfaceView = notification.object as? Ghostty.SurfaceView else { return }
+        guard surfaceTree?.contains(view: surfaceView) ?? false else { return }
+        window.zoom(nil)
+    }
+
     // MARK: Local Events
 
     private func localEventHandler(_ event: NSEvent) -> NSEvent? {

macos/Sources/Ghostty/Ghostty.App.swift

@@ -526,6 +526,9 @@ extension Ghostty {
             case GHOSTTY_ACTION_TOGGLE_COMMAND_PALETTE:
                 toggleCommandPalette(app, target: target)
 
+            case GHOSTTY_ACTION_TOGGLE_MAXIMIZE:
+                toggleMaximize(app, target: target)
+
             case GHOSTTY_ACTION_TOGGLE_QUICK_TERMINAL:
                 toggleQuickTerminal(app, target: target)
 
@@ -770,6 +773,29 @@ extension Ghostty {
             }
         }
 
+        private static func toggleMaximize(
+            _ app: ghostty_app_t,
+            target: ghostty_target_s
+        ) {
+            switch (target.tag) {
+            case GHOSTTY_TARGET_APP:
+                Ghostty.logger.warning("toggle maximize does nothing with an app target")
+                return
+
+            case GHOSTTY_TARGET_SURFACE:
+                guard let surface = target.target.surface else { return }
+                guard let surfaceView = self.surfaceView(from: surface) else { return }
+                NotificationCenter.default.post(
+                    name: .ghosttyMaximizeDidToggle,
+                    object: surfaceView
+                )
+
+
+            default:
+                assertionFailure()
+            }
+        }
+
         private static func toggleVisibility(
             _ app: ghostty_app_t,
             target: ghostty_target_s

macos/Sources/Ghostty/Package.swift

@@ -279,6 +279,9 @@ extension Notification.Name {
     /// Ring the bell
     static let ghosttyBellDidRing = Notification.Name("com.mitchellh.ghostty.ghosttyBellDidRing")
     static let ghosttyCommandPaletteDidToggle = Notification.Name("com.mitchellh.ghostty.commandPaletteDidToggle")
+
+    /// Toggle maximize of current window
+    static let ghosttyMaximizeDidToggle = Notification.Name("com.mitchellh.ghostty.maximizeDidToggle")
 }
 
 // NOTE: I am moving all of these to Notification.Name extensions over time. This