add context menu

crates/core/tests/context_menu.rs

@@ -0,0 +1,129 @@
+use std::{cell::RefCell, rc::Rc};
+
+use gpui::{
+    Context, IntoElement, MouseButton, ParentElement as _, Render, Styled as _, TestAppContext,
+    VisualTestContext, Window, div, point, px,
+};
+use gpui_native_core::context_menu::ContextMenu;
+use gpui_native_core::menu::MenuItem;
+use gpui_native_theme::Theme;
+
+type Actions = Rc<RefCell<Vec<&'static str>>>;
+
+struct Harness {
+    actions: Actions,
+}
+
+impl Render for Harness {
+    fn render(&mut self, _window: &mut Window, _cx: &mut Context<Self>) -> impl IntoElement {
+        let actions = self.actions.clone();
+        div().size_full().p_4().child(
+            ContextMenu::new("ctx")
+                .target(|_, _| div().h(px(40.)).w(px(200.)).child("Row").into_any_element())
+                .items({
+                    let actions = actions.clone();
+                    move |_, _| {
+                        vec![
+                            MenuItem::new("Rename").handler({
+                                let actions = actions.clone();
+                                move |_, _| actions.borrow_mut().push("rename")
+                            }),
+                            MenuItem::new("Delete").handler({
+                                let actions = actions.clone();
+                                move |_, _| actions.borrow_mut().push("delete")
+                            }),
+                        ]
+                    }
+                }),
+        )
+    }
+}
+
+/// The target row rides the `p_4` band: `16..216` horizontally, `16..56`
+/// vertically, so right-clicks land near `(100, 30)`.
+fn context_window() -> (TestAppContext, VisualTestContext, Actions) {
+    let mut cx = TestAppContext::single();
+    cx.update(Theme::init);
+    let actions = Rc::new(RefCell::new(Vec::new()));
+    let harness_actions = actions.clone();
+    let window = cx.add_window(move |_, _| Harness {
+        actions: harness_actions,
+    });
+    let mut visual = VisualTestContext::from_window(window.into(), &cx);
+    visual.update(|window, cx| {
+        window.draw(cx).clear(cx);
+    });
+    (cx, visual, actions)
+}
+
+fn right_click(visual: &mut VisualTestContext, position: gpui::Point<gpui::Pixels>) {
+    visual.simulate_mouse_down(position, MouseButton::Right, gpui::Modifiers::default());
+    visual.simulate_mouse_up(position, MouseButton::Right, gpui::Modifiers::default());
+}
+
+fn click(visual: &mut VisualTestContext, position: gpui::Point<gpui::Pixels>) {
+    visual.simulate_mouse_down(position, MouseButton::Left, gpui::Modifiers::default());
+    visual.simulate_mouse_up(position, MouseButton::Left, gpui::Modifiers::default());
+}
+
+fn draw(visual: &mut VisualTestContext) {
+    visual.update(|window, cx| {
+        window.draw(cx).clear(cx);
+    });
+}
+
+#[test]
+fn right_click_opens_the_menu_and_items_activate() {
+    let (_cx, mut visual, actions) = context_window();
+
+    right_click(&mut visual, point(px(100.), px(30.)));
+    draw(&mut visual);
+    // The panel claims focus, so the first item is keyboard-highlighted.
+    visual.simulate_keystrokes("enter");
+    draw(&mut visual);
+    assert_eq!(*actions.borrow(), vec!["rename"]);
+
+    // The menu closed with the choice, so Enter reports nothing more.
+    visual.simulate_keystrokes("enter");
+    draw(&mut visual);
+    assert_eq!(*actions.borrow(), vec!["rename"]);
+
+    // Right-click again reopens; Down reaches the second item.
+    right_click(&mut visual, point(px(100.), px(30.)));
+    draw(&mut visual);
+    visual.simulate_keystrokes("down");
+    visual.simulate_keystrokes("enter");
+    draw(&mut visual);
+    assert_eq!(*actions.borrow(), vec!["rename", "delete"]);
+}
+
+#[test]
+fn a_left_click_on_the_target_does_not_open_the_menu() {
+    let (_cx, mut visual, actions) = context_window();
+
+    click(&mut visual, point(px(100.), px(30.)));
+    draw(&mut visual);
+    visual.simulate_keystrokes("enter");
+    draw(&mut visual);
+    assert_eq!(*actions.borrow(), Vec::<&str>::new());
+}
+
+#[test]
+fn a_click_outside_closes_the_menu() {
+    let (_cx, mut visual, actions) = context_window();
+
+    right_click(&mut visual, point(px(100.), px(30.)));
+    draw(&mut visual);
+    click(&mut visual, point(px(450.), px(300.)));
+    draw(&mut visual);
+    visual.simulate_keystrokes("enter");
+    draw(&mut visual);
+    assert_eq!(*actions.borrow(), Vec::<&str>::new());
+
+    // A right-click outside the target never opens it either.
+    right_click(&mut visual, point(px(450.), px(300.)));
+    draw(&mut visual);
+    visual.simulate_keystrokes("enter");
+    draw(&mut visual);
+    assert_eq!(*actions.borrow(), Vec::<&str>::new());
+}