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/**
* @author mrdoob / http://mrdoob.com/
*/
function LoadingManager( onLoad, onProgress, onError ) {
var scope = this;
var isLoading = false;
var itemsLoaded = 0;
var itemsTotal = 0;
var urlModifier = undefined;
// Refer to #5689 for the reason why we don't set .onStart
// in the constructor
this.onStart = undefined;
this.onLoad = onLoad;
this.onProgress = onProgress;
this.onError = onError;
this.itemStart = function ( url ) {
itemsTotal ++;
if ( isLoading === false ) {
if ( scope.onStart !== undefined ) {
scope.onStart( url, itemsLoaded, itemsTotal );
}
}
isLoading = true;
};
this.itemEnd = function ( url ) {
itemsLoaded ++;
if ( scope.onProgress !== undefined ) {
scope.onProgress( url, itemsLoaded, itemsTotal );
}
if ( itemsLoaded === itemsTotal ) {
isLoading = false;
if ( scope.onLoad !== undefined ) {
scope.onLoad();
}
}
};
this.itemError = function ( url ) {
if ( scope.onError !== undefined ) {
scope.onError( url );
}
};
this.resolveURL = function ( url ) {
if ( urlModifier ) {
return urlModifier( url );
}
return url;
};
this.setURLModifier = function ( transform ) {
urlModifier = transform;
return this;
};
}
var DefaultLoadingManager = new LoadingManager();
export { DefaultLoadingManager, LoadingManager };
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