wip: design

crates/ui/src/dock_area/invalid_panel.rs

@@ -0,0 +1,61 @@
+use super::PanelEvent;
+use crate::{
+    dock_area::panel::Panel,
+    dock_area::state::PanelState,
+    theme::{scale::ColorScaleStep, ActiveTheme},
+};
+use gpui::{
+    AppContext, EventEmitter, FocusHandle, FocusableView, ParentElement as _, Render, SharedString,
+    Styled as _, WindowContext,
+};
+
+pub(crate) struct InvalidPanel {
+    name: SharedString,
+    focus_handle: FocusHandle,
+    old_state: PanelState,
+}
+
+impl InvalidPanel {
+    pub(crate) fn new(name: &str, state: PanelState, cx: &mut WindowContext) -> Self {
+        Self {
+            focus_handle: cx.focus_handle(),
+            name: SharedString::from(name.to_owned()),
+            old_state: state,
+        }
+    }
+}
+
+impl Panel for InvalidPanel {
+    fn panel_id(&self) -> SharedString {
+        "InvalidPanel".into()
+    }
+
+    fn dump(&self, _cx: &AppContext) -> PanelState {
+        self.old_state.clone()
+    }
+}
+
+impl EventEmitter<PanelEvent> for InvalidPanel {}
+
+impl FocusableView for InvalidPanel {
+    fn focus_handle(&self, _: &AppContext) -> FocusHandle {
+        self.focus_handle.clone()
+    }
+}
+
+impl Render for InvalidPanel {
+    fn render(&mut self, cx: &mut gpui::ViewContext<Self>) -> impl gpui::IntoElement {
+        gpui::div()
+            .size_full()
+            .my_6()
+            .flex()
+            .flex_col()
+            .items_center()
+            .justify_center()
+            .text_color(cx.theme().base.step(cx, ColorScaleStep::ELEVEN))
+            .child(format!(
+                "The `{}` panel type is not registered in PanelRegistry.",
+                self.name.clone()
+            ))
+    }
+}