e3968e2963
# Objective - Some imports are only used with certain features. ## Solution - Gate them! ## Testing - CI
76 lines
2.1 KiB
Rust
76 lines
2.1 KiB
Rust
use crate::ron;
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use bevy_ecs::{
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reflect::AppTypeRegistry,
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world::{FromWorld, World},
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};
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use bevy_reflect::TypeRegistryArc;
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use thiserror::Error;
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#[cfg(feature = "serialize")]
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use {
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crate::{serde::SceneDeserializer, DynamicScene},
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bevy_asset::{io::Reader, AssetLoader, LoadContext},
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serde::de::DeserializeSeed,
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};
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/// Asset loader for a Bevy dynamic scene (`.scn` / `.scn.ron`).
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///
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/// The loader handles assets serialized with [`DynamicScene::serialize`].
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#[derive(Debug)]
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pub struct SceneLoader {
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#[cfg_attr(
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not(feature = "serialize"),
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expect(dead_code, reason = "only used with `serialize` feature")
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)]
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type_registry: TypeRegistryArc,
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}
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impl FromWorld for SceneLoader {
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fn from_world(world: &mut World) -> Self {
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let type_registry = world.resource::<AppTypeRegistry>();
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SceneLoader {
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type_registry: type_registry.0.clone(),
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}
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}
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}
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/// Possible errors that can be produced by [`SceneLoader`]
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#[non_exhaustive]
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#[derive(Debug, Error)]
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pub enum SceneLoaderError {
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/// An [IO Error](std::io::Error)
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#[error("Error while trying to read the scene file: {0}")]
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Io(#[from] std::io::Error),
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/// A [RON Error](ron::error::SpannedError)
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#[error("Could not parse RON: {0}")]
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RonSpannedError(#[from] ron::error::SpannedError),
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}
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#[cfg(feature = "serialize")]
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impl AssetLoader for SceneLoader {
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type Asset = DynamicScene;
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type Settings = ();
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type Error = SceneLoaderError;
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async fn load(
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&self,
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reader: &mut dyn Reader,
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_settings: &(),
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_load_context: &mut LoadContext<'_>,
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) -> Result<Self::Asset, Self::Error> {
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let mut bytes = Vec::new();
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reader.read_to_end(&mut bytes).await?;
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let mut deserializer = ron::de::Deserializer::from_bytes(&bytes)?;
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let scene_deserializer = SceneDeserializer {
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type_registry: &self.type_registry.read(),
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};
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Ok(scene_deserializer
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.deserialize(&mut deserializer)
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.map_err(|e| deserializer.span_error(e))?)
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}
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fn extensions(&self) -> &[&str] {
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&["scn", "scn.ron"]
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}
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}
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