lua: add window:maximize() and window:restore() methods

Implemented on macOS only for the moment.

refs: https://github.com/wez/wezterm/issues/284

wezterm-gui/src/scripting/guiwin.rs

@@ -50,6 +50,14 @@ impl UserData for GuiWin {
             this.window.set_window_position(euclid::point2(x, y));
             Ok(())
         });
+        methods.add_method("maximize", |_, this, _: ()| {
+            this.window.maximize();
+            Ok(())
+        });
+        methods.add_method("restore", |_, this, _: ()| {
+            this.window.restore();
+            Ok(())
+        });
         methods.add_method(
             "toast_notification",
             |_, _, (title, message, url, timeout): (String, String, Option<String>, Option<u64>)| {

window/src/lib.rs

@@ -289,6 +289,9 @@ pub trait WindowOps {
     /// and/or in the task manager/task switcher
     fn set_icon(&self, _image: Image) {}
 
+    fn maximize(&self) {}
+    fn restore(&self) {}
+
     fn toggle_fullscreen(&self) {}
 
     fn config_did_change(&self, _config: &config::ConfigHandle) {}

window/src/os/macos/window.rs

@@ -687,6 +687,20 @@ impl WindowOps for Window {
         });
     }
 
+    fn maximize(&self) {
+        Connection::with_window_inner(self.id, move |inner| {
+            inner.maximize();
+            Ok(())
+        });
+    }
+
+    fn restore(&self) {
+        Connection::with_window_inner(self.id, move |inner| {
+            inner.restore();
+            Ok(())
+        });
+    }
+
     fn set_resize_increments(&self, x: u16, y: u16) {
         Connection::with_window_inner(self.id, move |inner| {
             inner.set_resize_increments(x, y);
@@ -1030,6 +1044,26 @@ impl WindowInner {
         }
     }
 
+    fn is_zoomed(&self) -> bool {
+        unsafe { msg_send![*self.window, isZoomed] }
+    }
+
+    fn maximize(&mut self) {
+        if !self.is_zoomed() {
+            unsafe {
+                NSWindow::zoom_(*self.window, nil);
+            }
+        }
+    }
+
+    fn restore(&mut self) {
+        if self.is_zoomed() {
+            unsafe {
+                NSWindow::zoom_(*self.window, nil);
+            }
+        }
+    }
+
     fn toggle_fullscreen(&mut self) {
         let native_fullscreen = self.config.native_macos_fullscreen_mode;