Struct AssetSourceBuilder 

pub struct AssetSourceBuilder {
    pub reader: Box<dyn FnMut() -> Box<dyn ErasedAssetReader> + Send + Sync>,
    pub writer: Option<Box<dyn FnMut(bool) -> Option<Box<dyn ErasedAssetWriter>> + Send + Sync>>,
    pub watcher: Option<Box<dyn FnMut(Sender<AssetSourceEvent>) -> Option<Box<dyn AssetWatcher>> + Send + Sync>>,
    pub processed_reader: Option<Box<dyn FnMut() -> Box<dyn ErasedAssetReader> + Send + Sync>>,
    pub processed_writer: Option<Box<dyn FnMut(bool) -> Option<Box<dyn ErasedAssetWriter>> + Send + Sync>>,
    pub processed_watcher: Option<Box<dyn FnMut(Sender<AssetSourceEvent>) -> Option<Box<dyn AssetWatcher>> + Send + Sync>>,
    pub watch_warning: Option<&'static str>,
    pub processed_watch_warning: Option<&'static str>,
}

Metadata about an “asset source”, such as how to construct the AssetReader and AssetWriter for the source, and whether or not the source is processed.

Fields

reader: Box<dyn FnMut() -> Box<dyn ErasedAssetReader> + Send + Sync>

The ErasedAssetReader to use on the unprocessed asset.

writer: Option<Box<dyn FnMut(bool) -> Option<Box<dyn ErasedAssetWriter>> + Send + Sync>>

The ErasedAssetWriter to use on the unprocessed asset.

watcher: Option<Box<dyn FnMut(Sender<AssetSourceEvent>) -> Option<Box<dyn AssetWatcher>> + Send + Sync>>

The AssetWatcher to use for unprocessed assets, if any.

processed_reader: Option<Box<dyn FnMut() -> Box<dyn ErasedAssetReader> + Send + Sync>>

The ErasedAssetReader to use for processed assets.

processed_writer: Option<Box<dyn FnMut(bool) -> Option<Box<dyn ErasedAssetWriter>> + Send + Sync>>

The ErasedAssetWriter to use for processed assets.

processed_watcher: Option<Box<dyn FnMut(Sender<AssetSourceEvent>) -> Option<Box<dyn AssetWatcher>> + Send + Sync>>

The AssetWatcher to use for processed assets, if any.

watch_warning: Option<&'static str>

The warning message to display when watching an unprocessed asset fails.

processed_watch_warning: Option<&'static str>

The warning message to display when watching a processed asset fails.

Implementations

impl AssetSourceBuilder

pub fn new( reader: impl FnMut() -> Box<dyn ErasedAssetReader> + Send + Sync + 'static, ) -> AssetSourceBuilder

Creates a new builder, starting with the provided reader.

pub fn build( &mut self, id: AssetSourceId<'static>, watch: bool, watch_processed: bool, ) -> AssetSource

Builds a new AssetSource with the given id. If watch is true, the unprocessed source will watch for changes. If watch_processed is true, the processed source will watch for changes.

pub fn with_reader( self, reader: impl FnMut() -> Box<dyn ErasedAssetReader> + Send + Sync + 'static, ) -> Self

Will use the given reader function to construct unprocessed AssetReader instances.

pub fn with_writer( self, writer: impl FnMut(bool) -> Option<Box<dyn ErasedAssetWriter>> + Send + Sync + 'static, ) -> Self

Will use the given writer function to construct unprocessed AssetWriter instances.

pub fn with_watcher( self, watcher: impl FnMut(Sender<AssetSourceEvent>) -> Option<Box<dyn AssetWatcher>> + Send + Sync + 'static, ) -> Self

Will use the given watcher function to construct unprocessed AssetWatcher instances.

pub fn with_processed_reader( self, reader: impl FnMut() -> Box<dyn ErasedAssetReader> + Send + Sync + 'static, ) -> Self

Will use the given reader function to construct processed AssetReader instances.

pub fn with_processed_writer( self, writer: impl FnMut(bool) -> Option<Box<dyn ErasedAssetWriter>> + Send + Sync + 'static, ) -> Self

Will use the given writer function to construct processed AssetWriter instances.

pub fn with_processed_watcher( self, watcher: impl FnMut(Sender<AssetSourceEvent>) -> Option<Box<dyn AssetWatcher>> + Send + Sync + 'static, ) -> Self

Will use the given watcher function to construct processed AssetWatcher instances.

pub fn with_watch_warning(self, warning: &'static str) -> Self

Enables a warning for the unprocessed source watcher, which will print when watching is enabled and the unprocessed source doesn’t have a watcher.

pub fn with_processed_watch_warning(self, warning: &'static str) -> Self

Enables a warning for the processed source watcher, which will print when watching is enabled and the processed source doesn’t have a watcher.

pub fn platform_default(path: &str, processed_path: Option<&str>) -> Self

Returns a builder containing the “platform default source” for the given path and processed_path. For most platforms, this will use FileAssetReader / FileAssetWriter, but some platforms (such as Android) have their own default readers / writers / watchers.