Introduce reset_window_size keybinding and apprt action

Related to #6035

This implements the keybind/action portion of #5974 so that this can
have a binding and so that other apprts can respond to this and
implement it this way.

include/ghostty.h

@@ -580,6 +580,7 @@ typedef enum {
   GHOSTTY_ACTION_TOGGLE_SPLIT_ZOOM,
   GHOSTTY_ACTION_PRESENT_TERMINAL,
   GHOSTTY_ACTION_SIZE_LIMIT,
+  GHOSTTY_ACTION_RESET_WINDOW_SIZE,
   GHOSTTY_ACTION_INITIAL_SIZE,
   GHOSTTY_ACTION_CELL_SIZE,
   GHOSTTY_ACTION_INSPECTOR,

macos/Sources/App/macOS/AppDelegate.swift

@@ -51,6 +51,7 @@ class AppDelegate: NSObject,
     @IBOutlet private var menuSelectSplitBelow: NSMenuItem?
     @IBOutlet private var menuSelectSplitLeft: NSMenuItem?
     @IBOutlet private var menuSelectSplitRight: NSMenuItem?
+    @IBOutlet private var menuReturnToDefaultSize: NSMenuItem?
 
     @IBOutlet private var menuIncreaseFontSize: NSMenuItem?
     @IBOutlet private var menuDecreaseFontSize: NSMenuItem?
@@ -386,6 +387,7 @@ class AppDelegate: NSObject,
         syncMenuShortcut(config, action: "resize_split:right,10", menuItem: self.menuMoveSplitDividerRight)
         syncMenuShortcut(config, action: "resize_split:left,10", menuItem: self.menuMoveSplitDividerLeft)
         syncMenuShortcut(config, action: "equalize_splits", menuItem: self.menuEqualizeSplits)
+        syncMenuShortcut(config, action: "reset_window_size", menuItem: self.menuReturnToDefaultSize)
 
         syncMenuShortcut(config, action: "increase_font_size:1", menuItem: self.menuIncreaseFontSize)
         syncMenuShortcut(config, action: "decrease_font_size:1", menuItem: self.menuDecreaseFontSize)

macos/Sources/App/macOS/MainMenu.xib

@@ -40,6 +40,7 @@
                 <outlet property="menuQuit" destination="4sb-4s-VLi" id="qYN-S1-6UW"/>
                 <outlet property="menuReloadConfig" destination="KKH-XX-5py" id="Wvp-7J-wqX"/>
                 <outlet property="menuResetFontSize" destination="Jah-MY-aLX" id="ger-qM-wrm"/>
+                <outlet property="menuReturnToDefaultSize" destination="Gbx-Vi-OGC" id="po9-qC-Iz6"/>
                 <outlet property="menuSecureInput" destination="oC6-w4-qI7" id="PCc-pe-Mda"/>
                 <outlet property="menuSelectAll" destination="q2h-lq-e4r" id="s98-r1-Jcv"/>
                 <outlet property="menuSelectSplitAbove" destination="0yU-hC-8xF" id="aPc-lS-own"/>

macos/Sources/Features/Terminal/TerminalController.swift

@@ -68,6 +68,12 @@ class TerminalController: BaseTerminalController {
             selector: #selector(onCloseTab),
             name: .ghosttyCloseTab,
             object: nil)
+        center.addObserver(
+            self,
+            selector: #selector(onResetWindowSize),
+            name: .ghosttyResetWindowSize,
+            object: nil
+        )
         center.addObserver(
             self,
             selector: #selector(ghosttyConfigDidChange(_:)),
@@ -612,7 +618,7 @@ class TerminalController: BaseTerminalController {
         window.close()
     }
 
-    @IBAction func returnToDefaultSize(_ sender: Any) {
+    @IBAction func returnToDefaultSize(_ sender: Any?) {
         guard let defaultSize else { return }
         window?.setFrame(defaultSize, display: true)
     }
@@ -830,6 +836,12 @@ class TerminalController: BaseTerminalController {
         closeTab(self)
     }
 
+    @objc private func onResetWindowSize(notification: SwiftUI.Notification) {
+        guard let target = notification.object as? Ghostty.SurfaceView else { return }
+        guard surfaceTree?.contains(view: target) ?? false else { return }
+        returnToDefaultSize(nil)
+    }
+
     @objc private func onToggleFullscreen(notification: SwiftUI.Notification) {
         guard let target = notification.object as? Ghostty.SurfaceView else { return }
         guard target == self.focusedSurface else { return }

macos/Sources/Ghostty/Ghostty.App.swift

@@ -508,6 +508,9 @@ extension Ghostty {
             case GHOSTTY_ACTION_INITIAL_SIZE:
                 setInitialSize(app, target: target, v: action.action.initial_size)
 
+            case GHOSTTY_ACTION_RESET_WINDOW_SIZE:
+                resetWindowSize(app, target: target)
+
             case GHOSTTY_ACTION_CELL_SIZE:
                 setCellSize(app, target: target, v: action.action.cell_size)
 
@@ -1131,7 +1134,7 @@ extension Ghostty {
             v: ghostty_action_initial_size_s) {
             switch (target.tag) {
             case GHOSTTY_TARGET_APP:
-                Ghostty.logger.warning("mouse over link does nothing with an app target")
+                Ghostty.logger.warning("initial size does nothing with an app target")
                 return
 
             case GHOSTTY_TARGET_SURFACE:
@@ -1145,6 +1148,28 @@ extension Ghostty {
             }
         }
 
+        private static func resetWindowSize(
+            _ app: ghostty_app_t,
+            target: ghostty_target_s) {
+            switch (target.tag) {
+            case GHOSTTY_TARGET_APP:
+                Ghostty.logger.warning("reset window size 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: .ghosttyResetWindowSize,
+                    object: surfaceView
+                )
+
+
+            default:
+                assertionFailure()
+            }
+        }
+
         private static func setCellSize(
             _ app: ghostty_app_t,
             target: ghostty_target_s,

macos/Sources/Ghostty/Package.swift

@@ -247,6 +247,9 @@ extension Notification.Name {
 
     /// Close tab
     static let ghosttyCloseTab = Notification.Name("com.mitchellh.ghostty.closeTab")
+
+    /// Resize the window to a default size.
+    static let ghosttyResetWindowSize = Notification.Name("com.mitchellh.ghostty.resetWindowSize")
 }
 
 // NOTE: I am moving all of these to Notification.Name extensions over time. This

src/Surface.zig

@@ -4228,6 +4228,12 @@ pub fn performBindingAction(self: *Surface, action: input.Binding.Action) !bool
             {},
         ),
 
+        .reset_window_size => return try self.rt_app.performAction(
+            .{ .surface = self },
+            .reset_window_size,
+            {},
+        ),
+
         .toggle_maximize => return try self.rt_app.performAction(
             .{ .surface = self },
             .toggle_maximize,

src/apprt/action.zig

@@ -140,6 +140,10 @@ pub const Action = union(Key) {
     /// Sets a size limit (in pixels) for the target terminal.
     size_limit: SizeLimit,
 
+    /// Resets the window size to the default size. See the
+    /// `reset_window_size` keybinding for more information.
+    reset_window_size,
+
     /// Specifies the initial size of the target terminal.
     ///
     /// This may be sent once during the initialization of a surface
@@ -259,6 +263,7 @@ pub const Action = union(Key) {
         toggle_split_zoom,
         present_terminal,
         size_limit,
+        reset_window_size,
         initial_size,
         cell_size,
         inspector,

src/apprt/glfw.zig

@@ -240,6 +240,7 @@ pub const App = struct {
             .config_change,
             .toggle_maximize,
             .prompt_title,
+            .reset_window_size,
             => {
                 log.info("unimplemented action={}", .{action});
                 return false;

src/apprt/gtk/App.zig

@@ -512,6 +512,7 @@ pub fn performAction(
         .render_inspector,
         .renderer_health,
         .color_change,
+        .reset_window_size,
         => {
             log.warn("unimplemented action={}", .{action});
             return false;

src/input/Binding.zig

@@ -380,6 +380,11 @@ pub const Action = union(enum) {
     /// Equalize all splits in the current window
     equalize_splits: void,
 
+    /// Reset the window to the default size. The "default size" is the
+    /// size that a new window would be created with. This has no effect
+    /// if the window is fullscreen.
+    reset_window_size: void,
+
     /// Control the terminal inspector visibility.
     ///
     /// Arguments:
@@ -772,6 +777,7 @@ pub const Action = union(enum) {
             .toggle_fullscreen,
             .toggle_window_decorations,
             .toggle_secure_input,
+            .reset_window_size,
             .crash,
             => .surface,