ratatui-kit 0.7.2

use crate::{Component, Props, State};
use ratatui::widgets::StatefulWidget;

// `T::State` 仍要求 Send + Sync,因 `State<T::State>` 需可存储于框架的
// SyncStorage 状态体系中;0.30 起 `StatefulWidget::State`
// 去掉了隐式 `Sized`,故显式补 `Sized`。

pub struct StatefulWidgetAdapterProps<T>
where
    T: StatefulWidget + 'static,
    T::State: Sized + Sync + Send + 'static,
{
    pub inner: T,
    pub state: State<T::State>,
}

impl<T> Props for StatefulWidgetAdapterProps<T>
where
    T: StatefulWidget + 'static,
    T::State: Sized + Sync + Send + 'static,
{
}

pub struct StatefulWidgetAdapter<T>
where
    T: StatefulWidget + 'static,
    T::State: Sized + Sync + Send + 'static,
{
    inner: T,
    state: State<T::State>,
}

impl<T> Component for StatefulWidgetAdapter<T>
where
    T: StatefulWidget + 'static + Unpin + Clone,
    T::State: Sized + Sync + Send + 'static + Unpin,
    // 0.30 起 `List`/`Table` 等实现了 `StatefulWidget for &T` 且 State 类型一致,
    // 借此约束即可在 draw 里按引用渲染。
    for<'a> &'a T: StatefulWidget<State = T::State>,
{
    type Props<'a> = StatefulWidgetAdapterProps<T>;

    fn new(props: &Self::Props<'_>) -> Self {
        Self {
            inner: props.inner.clone(),
            state: props.state,
        }
    }

    fn update(
        &mut self,
        props: &mut Self::Props<'_>,
        _hooks: crate::Hooks,
        _updater: &mut crate::ComponentUpdater,
    ) {
        self.inner = props.inner.clone();
        self.state = props.state;
    }

    fn draw(&mut self, drawer: &mut crate::ComponentDrawer<'_, '_>) {
        // 按引用渲染,免去每帧一次 clone。render_stateful_widget 泛型固定 W: StatefulWidget,
        // 故 `&List` 不会触发 Widget/StatefulWidget 的 render 方法歧义(E0034)。
        drawer.render_stateful_widget(&self.inner, drawer.area, &mut self.state.write_no_update());
    }
}