Trait veloren_common_assets::Source
pub trait Source {
// Required methods
fn read(&self, id: &str, ext: &str) -> Result<FileContent<'_>, Error>;
fn read_dir(
&self,
id: &str,
f: &mut dyn FnMut(DirEntry<'_>)
) -> Result<(), Error>;
fn exists(&self, entry: DirEntry<'_>) -> bool;
// Provided methods
fn make_source(&self) -> Option<Box<dyn Source + Send>> { ... }
fn configure_hot_reloading(
&self,
_events: EventSender
) -> Result<(), Box<dyn Error + Send + Sync>> { ... }
}Expand description
Bytes sources to load assets from.
This trait provides an abstraction over a basic filesystem, which is used to load assets independantly from the actual storage kind.
As a consumer of this library, you generally don’t need to use this trait,
exept when implementing [DirLoadable].
See module-level documentation for more informations.
Required Methods§
fn read(&self, id: &str, ext: &str) -> Result<FileContent<'_>, Error>
fn read(&self, id: &str, ext: &str) -> Result<FileContent<'_>, Error>
Try reading the source given an id and an extension.
If no error occurs, this function returns the raw content of the file as
a FileContent, so it can avoid copying bytes around if possible.
Most of the time, you won’t need to use this method, directly, as it is
done for you by an [AssetCache] when you load Assets.
fn read_dir(
&self,
id: &str,
f: &mut dyn FnMut(DirEntry<'_>)
) -> Result<(), Error>
fn read_dir( &self, id: &str, f: &mut dyn FnMut(DirEntry<'_>) ) -> Result<(), Error>
Reads the content of a directory.
If no error occurs, this function executes the given closure for each entry in the directory.
Example
use assets_manager::source::{DirEntry, FileSystem, Source};
// In "assets/example" directory, there are "giant_bat.ron",
// "goblin.ron", and other files that do not have "ron" extension.
let fs = FileSystem::new("assets")?;
let mut dir_content = Vec::new();
fs.read_dir("example.monsters", &mut |entry| {
if let DirEntry::File(id, ext) = entry {
if ext == "ron" {
dir_content.push(id.to_owned());
}
}
})?;
// Sort for equality comparison
dir_content.sort();
assert_eq!(dir_content, ["example.monsters.giant_bat", "example.monsters.goblin"]);fn exists(&self, entry: DirEntry<'_>) -> bool
fn exists(&self, entry: DirEntry<'_>) -> bool
Returns true if the entry points at an existing entity.
Example
use assets_manager::source::{DirEntry, FileSystem, Source};
let fs = FileSystem::new("assets")?;
assert!(fs.exists(DirEntry::File("example.monsters.goblin", "ron")));
assert!(!fs.exists(DirEntry::File("example.monsters.spider", "ron")));Provided Methods§
fn make_source(&self) -> Option<Box<dyn Source + Send>>
fn make_source(&self) -> Option<Box<dyn Source + Send>>
Returns a source to use with hot-reloading.
This method returns None when the source does not support
hot-reloading. In this case, configure_hot_reloading will never be
called.
fn configure_hot_reloading(
&self,
_events: EventSender
) -> Result<(), Box<dyn Error + Send + Sync>>
fn configure_hot_reloading( &self, _events: EventSender ) -> Result<(), Box<dyn Error + Send + Sync>>
Configures hot-reloading.
This method receives an EventSender to notify the hot-reloading
subsystem when assets should be reloaded. It returns a DynUpdateSender
to be notified of cache state changes.