use iris::prelude::*;

pub(crate) fn on_tap<Rsc: HasEvents>(
    rsc: &mut Rsc,
    ptr: WeakWidget<WidgetPtr>,
    list: WeakWidget<LazySpan>,
    f: impl Fn(&mut Rsc) + 'static,
) where
    Rsc::State: FocusHost + OpenUrl,
{
    ptr.on(CursorSense::drag_senses(), move |ctx, rsc: &mut Rsc| {
        let input = &ctx.data;
        let outcome = rsc
            .with_nearest_controller::<SelectionController, _>(list, |id, selection, rsc| {
                selection.drag(id, rsc, input)
            })
            .unwrap_or(SelectionInput::Tapped);
        if outcome == SelectionInput::Tapped {
            f(rsc);
        }
    })
    .add(rsc);
}

pub(crate) fn hold_edge(rsc: &mut impl UiRsc, list: WeakWidget<LazySpan>, key: RowKey) {
    if let Some((top, _bottom)) = list(rsc).extent(key) {
        list(rsc).note_tap(top);
    }
}