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use crate::widget::{
    node::{WidgetNode, WidgetNodePrefab},
    unit::{WidgetUnit, WidgetUnitData},
    WidgetId,
};
use serde::{Deserialize, Serialize};
use std::convert::TryFrom;

#[derive(Debug, Default, Clone, Serialize, Deserialize)]
pub struct AreaBox {
    #[serde(default)]
    pub id: WidgetId,
    #[serde(default)]
    pub slot: Box<WidgetUnit>,
}

impl WidgetUnitData for AreaBox {
    fn id(&self) -> &WidgetId {
        &self.id
    }

    fn get_children(&self) -> Vec<&WidgetUnit> {
        vec![&self.slot]
    }
}

impl TryFrom<AreaBoxNode> for AreaBox {
    type Error = ();

    fn try_from(node: AreaBoxNode) -> Result<Self, Self::Error> {
        let AreaBoxNode { id, slot, .. } = node;
        Ok(Self {
            id,
            slot: Box::new(WidgetUnit::try_from(*slot)?),
        })
    }
}

#[derive(Debug, Default, Clone)]
pub struct AreaBoxNode {
    pub id: WidgetId,
    pub slot: Box<WidgetNode>,
}

impl Into<WidgetNode> for AreaBoxNode {
    fn into(self) -> WidgetNode {
        WidgetNode::Unit(self.into())
    }
}

#[derive(Debug, Default, Clone, Serialize, Deserialize)]
pub(crate) struct AreaBoxNodePrefab {
    #[serde(default)]
    pub id: WidgetId,
    #[serde(default)]
    pub slot: Box<WidgetNodePrefab>,
}