Remember last focused window position for next startup

macos/Ghostty.xcodeproj/project.pbxproj

@@ -72,6 +72,7 @@
 		A5A2A3CA2D4445E30033CF96 /* Dock.swift in Sources */ = {isa = PBXBuildFile; fileRef = A5A2A3C92D4445E20033CF96 /* Dock.swift */; };
 		A5A2A3CC2D444ABB0033CF96 /* NSApplication+Extension.swift in Sources */ = {isa = PBXBuildFile; fileRef = A5A2A3CB2D444AB80033CF96 /* NSApplication+Extension.swift */; };
 		A5A6F72A2CC41B8900B232A5 /* Xcode.swift in Sources */ = {isa = PBXBuildFile; fileRef = A5A6F7292CC41B8700B232A5 /* Xcode.swift */; };
+		A5AEB1652D5BE7D000513529 /* LastWindowPosition.swift in Sources */ = {isa = PBXBuildFile; fileRef = A5AEB1642D5BE7BF00513529 /* LastWindowPosition.swift */; };
 		A5B30539299BEAAB0047F10C /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = A5B30538299BEAAB0047F10C /* Assets.xcassets */; };
 		A5CA378C2D2A4DEB00931030 /* KeyboardLayout.swift in Sources */ = {isa = PBXBuildFile; fileRef = A5CA378B2D2A4DE800931030 /* KeyboardLayout.swift */; };
 		A5CA378E2D31D6C300931030 /* Weak.swift in Sources */ = {isa = PBXBuildFile; fileRef = A5CA378D2D31D6C100931030 /* Weak.swift */; };
@@ -168,6 +169,7 @@
 		A5A2A3C92D4445E20033CF96 /* Dock.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Dock.swift; sourceTree = "<group>"; };
 		A5A2A3CB2D444AB80033CF96 /* NSApplication+Extension.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "NSApplication+Extension.swift"; sourceTree = "<group>"; };
 		A5A6F7292CC41B8700B232A5 /* Xcode.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Xcode.swift; sourceTree = "<group>"; };
+		A5AEB1642D5BE7BF00513529 /* LastWindowPosition.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LastWindowPosition.swift; sourceTree = "<group>"; };
 		A5B30531299BEAAA0047F10C /* Ghostty.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Ghostty.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		A5B30538299BEAAB0047F10C /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
 		A5B3053D299BEAAB0047F10C /* Ghostty.entitlements */ = {isa = PBXFileReference; lastKnownFileType = text.plist.entitlements; path = Ghostty.entitlements; sourceTree = "<group>"; };
@@ -270,6 +272,7 @@
 		A534263D2A7DCBB000EBB7A2 /* Helpers */ = {
 			isa = PBXGroup;
 			children = (
+				A5AEB1642D5BE7BF00513529 /* LastWindowPosition.swift */,
 				A5A6F7292CC41B8700B232A5 /* Xcode.swift */,
 				A5CEAFFE29C2410700646FDA /* Backport.swift */,
 				A5333E1B2B5A1CE3008AEFF7 /* CrossKit.swift */,
@@ -623,6 +626,7 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				A5AEB1652D5BE7D000513529 /* LastWindowPosition.swift in Sources */,
 				A59630A42AF059BB00D64628 /* Ghostty.SplitNode.swift in Sources */,
 				A514C8D62B54A16400493A16 /* Ghostty.Config.swift in Sources */,
 				A54B0CEB2D0CFB4C00CBEFF8 /* NSImage+Extension.swift in Sources */,

macos/Sources/Features/Terminal/TerminalController.swift

@@ -283,9 +283,12 @@ class TerminalController: BaseTerminalController {
     private func setInitialWindowPosition(x: Int16?, y: Int16?, windowDecorations: Bool) {
         guard let window else { return }
 
-        // If we don't have both an X and Y we center.
+        // If we don't have an X/Y then we try to use the previously saved window pos.
         guard let x, let y else {
+            if (!LastWindowPosition.shared.restore(window)) {
                 window.center()
+            }
+
             return
         }
 
@@ -490,6 +493,20 @@ class TerminalController: BaseTerminalController {
     override func windowDidMove(_ notification: Notification) {
         super.windowDidMove(notification)
         self.fixTabBar()
+
+        // Whenever we move save our last position for the next start.
+        if let window {
+            LastWindowPosition.shared.save(window)
+        }
+    }
+
+    func windowDidBecomeMain(_ notification: Notification) {
+        // Whenever we get focused, use that as our last window position for
+        // restart. This differs from Terminal.app but matches iTerm2 behavior
+        // and I think its sensible.
+        if let window {
+            LastWindowPosition.shared.save(window)
+        }
     }
 
     // Called when the window will be encoded. We handle the data encoding here in the

macos/Sources/Helpers/LastWindowPosition.swift

@@ -0,0 +1,34 @@
+import Cocoa
+
+/// Manages the persistence and restoration of window positions across app launches.
+class LastWindowPosition {
+    static let shared = LastWindowPosition()
+
+    private let positionKey = "NSWindowLastPosition"
+
+    func save(_ window: NSWindow) {
+        let origin = window.frame.origin
+        let point = [origin.x, origin.y]
+        UserDefaults.standard.set(point, forKey: positionKey)
+    }
+
+    func restore(_ window: NSWindow) -> Bool {
+        guard let points = UserDefaults.standard.array(forKey: positionKey) as? [Double],
+              points.count == 2 else { return false }
+
+        let lastPosition = CGPoint(x: points[0], y: points[1])
+
+        guard let screen = window.screen ?? NSScreen.main else { return false }
+        let visibleFrame = screen.visibleFrame
+
+        var newFrame = window.frame
+        newFrame.origin = lastPosition
+        if !visibleFrame.contains(newFrame.origin) {
+            newFrame.origin.x = max(visibleFrame.minX, min(visibleFrame.maxX - newFrame.width, newFrame.origin.x))
+            newFrame.origin.y = max(visibleFrame.minY, min(visibleFrame.maxY - newFrame.height, newFrame.origin.y))
+        }
+
+        window.setFrame(newFrame, display: true)
+        return true
+    }
+}