More vim fixes and move some more things out of app.rs

crates/gpui/src/app/menu.rs

@@ -0,0 +1,52 @@
+use crate::{Action, App, ForegroundPlatform, MutableAppContext};
+
+pub struct Menu<'a> {
+    pub name: &'a str,
+    pub items: Vec<MenuItem<'a>>,
+}
+
+pub enum MenuItem<'a> {
+    Separator,
+    Submenu(Menu<'a>),
+    Action {
+        name: &'a str,
+        action: Box<dyn Action>,
+    },
+}
+
+impl MutableAppContext {
+    pub fn set_menus(&mut self, menus: Vec<Menu>) {
+        self.foreground_platform
+            .set_menus(menus, &self.keystroke_matcher);
+    }
+}
+
+pub(crate) fn setup_menu_handlers(foreground_platform: &dyn ForegroundPlatform, app: &App) {
+    foreground_platform.on_will_open_menu(Box::new({
+        let cx = app.0.clone();
+        move || {
+            let mut cx = cx.borrow_mut();
+            cx.keystroke_matcher.clear_pending();
+        }
+    }));
+    foreground_platform.on_validate_menu_command(Box::new({
+        let cx = app.0.clone();
+        move |action| {
+            let cx = cx.borrow_mut();
+            !cx.keystroke_matcher.has_pending_keystrokes() && cx.is_action_available(action)
+        }
+    }));
+    foreground_platform.on_menu_command(Box::new({
+        let cx = app.0.clone();
+        move |action| {
+            let mut cx = cx.borrow_mut();
+            if let Some(key_window_id) = cx.cx.platform.key_window_id() {
+                if let Some(view_id) = cx.focused_view_id(key_window_id) {
+                    cx.handle_dispatch_action_from_effect(key_window_id, Some(view_id), action);
+                    return;
+                }
+            }
+            cx.dispatch_global_action_any(action);
+        }
+    }));
+}