Start on app menus

crates/gpui2/src/platform/app_menu.rs

@@ -0,0 +1,96 @@
+use crate::{Action, AppContext, Platform};
+use util::ResultExt;
+
+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>,
+        os_action: Option<OsAction>,
+    },
+}
+
+impl<'a> MenuItem<'a> {
+    pub fn separator() -> Self {
+        Self::Separator
+    }
+
+    pub fn submenu(menu: Menu<'a>) -> Self {
+        Self::Submenu(menu)
+    }
+
+    pub fn action(name: &'a str, action: impl Action) -> Self {
+        Self::Action {
+            name,
+            action: Box::new(action),
+            os_action: None,
+        }
+    }
+
+    pub fn os_action(name: &'a str, action: impl Action, os_action: OsAction) -> Self {
+        Self::Action {
+            name,
+            action: Box::new(action),
+            os_action: Some(os_action),
+        }
+    }
+}
+
+#[derive(Copy, Clone, Eq, PartialEq)]
+pub enum OsAction {
+    Cut,
+    Copy,
+    Paste,
+    SelectAll,
+    Undo,
+    Redo,
+}
+
+pub(crate) fn init(platform: &dyn Platform, cx: &mut AppContext) {
+    platform.on_will_open_menu(Box::new({
+        let cx = cx.to_async();
+        move || {
+            cx.update(|cx| cx.clear_pending_keystrokes()).ok();
+        }
+    }));
+
+    platform.on_validate_menu_command(Box::new({
+        let cx = cx.to_async();
+        move |action| {
+            cx.update(|cx| cx.is_action_available(action))
+                .unwrap_or(false)
+        }
+    }));
+
+    platform.on_menu_command(Box::new({
+        let cx = cx.to_async();
+        move |action| {
+            cx.update(|cx| {
+                // if let Some(main_window) = cx.active_window() {
+                //     let dispatched = main_window
+                //         .update(&mut *cx, |cx| {
+                //             if let Some(view_id) = cx.focused_view_id() {
+                //                 cx.dispatch_action(Some(view_id), action);
+                //                 true
+                //             } else {
+                //                 false
+                //             }
+                //         })
+                //         .unwrap_or(false);
+
+                //     if dispatched {
+                //         return;
+                //     }
+                // }
+                // cx.dispatch_global_action_any(action);
+            })
+            .log_err();
+        }
+    }));
+}