use crate::prelude::*;
use winit::dpi::{PhysicalPosition, PhysicalSize};

impl<T: HasDefaultUiState> FocusHost for T {
    fn recent_click(&mut self) -> bool {
        crate::attr::recent_click(&mut self.default_state_mut().last_click)
    }

    fn set_focus(&mut self, id: Option<WeakWidget<TextEdit>>) {
        self.default_state_mut().focus = id;
    }

    fn is_focused(&self, id: WeakWidget<TextEdit>) -> bool {
        self.default_state().focus == Some(id)
    }

    fn focus_gained(&mut self, region: Option<PixelRegion>) {
        let state = self.default_state_mut();
        let Some(region) = region else { return };
        state.window.set_ime_allowed(true);
        state.window.set_ime_cursor_area(
            PhysicalPosition::<f32>::from(region.top_left.tuple()),
            PhysicalSize::<f32>::from(region.size().tuple()),
        );
    }
}