143 lines
2.0 KiB
JavaScript
143 lines
2.0 KiB
JavaScript
class LoadingManager {
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constructor( onLoad, onProgress, onError ) {
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const scope = this;
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let isLoading = false;
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let itemsLoaded = 0;
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let itemsTotal = 0;
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let urlModifier = undefined;
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const handlers = [];
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// Refer to #5689 for the reason why we don't set .onStart
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// in the constructor
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this.onStart = undefined;
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this.onLoad = onLoad;
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this.onProgress = onProgress;
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this.onError = onError;
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this.itemStart = function ( url ) {
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itemsTotal ++;
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if ( isLoading === false ) {
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if ( scope.onStart !== undefined ) {
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scope.onStart( url, itemsLoaded, itemsTotal );
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}
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}
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isLoading = true;
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};
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this.itemEnd = function ( url ) {
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itemsLoaded ++;
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if ( scope.onProgress !== undefined ) {
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scope.onProgress( url, itemsLoaded, itemsTotal );
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}
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if ( itemsLoaded === itemsTotal ) {
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isLoading = false;
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if ( scope.onLoad !== undefined ) {
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scope.onLoad();
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}
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}
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};
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this.itemError = function ( url ) {
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if ( scope.onError !== undefined ) {
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scope.onError( url );
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}
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};
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this.resolveURL = function ( url ) {
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if ( urlModifier ) {
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return urlModifier( url );
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}
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return url;
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};
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this.setURLModifier = function ( transform ) {
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urlModifier = transform;
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return this;
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};
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this.addHandler = function ( regex, loader ) {
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handlers.push( regex, loader );
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return this;
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};
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this.removeHandler = function ( regex ) {
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const index = handlers.indexOf( regex );
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if ( index !== - 1 ) {
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handlers.splice( index, 2 );
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}
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return this;
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};
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this.getHandler = function ( file ) {
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for ( let i = 0, l = handlers.length; i < l; i += 2 ) {
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const regex = handlers[ i ];
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const loader = handlers[ i + 1 ];
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if ( regex.global ) regex.lastIndex = 0; // see #17920
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if ( regex.test( file ) ) {
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return loader;
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}
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}
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return null;
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};
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}
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}
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const DefaultLoadingManager = /*@__PURE__*/ new LoadingManager();
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export { DefaultLoadingManager, LoadingManager };
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