| class LoadingManager { |
|
|
| constructor( onLoad, onProgress, onError ) { |
|
|
| const scope = this; |
|
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| let isLoading = false; |
| let itemsLoaded = 0; |
| let itemsTotal = 0; |
| let urlModifier = undefined; |
| const handlers = []; |
|
|
| |
| |
|
|
| this.onStart = undefined; |
| this.onLoad = onLoad; |
| this.onProgress = onProgress; |
| this.onError = onError; |
|
|
| this.itemStart = function ( url ) { |
|
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| itemsTotal ++; |
|
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| if ( isLoading === false ) { |
|
|
| if ( scope.onStart !== undefined ) { |
|
|
| scope.onStart( url, itemsLoaded, itemsTotal ); |
|
|
| } |
|
|
| } |
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|
| isLoading = true; |
|
|
| }; |
|
|
| 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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| if ( itemsLoaded === itemsTotal ) { |
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| isLoading = false; |
|
|
| if ( scope.onLoad !== undefined ) { |
|
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| scope.onLoad(); |
|
|
| } |
|
|
| } |
|
|
| }; |
|
|
| this.itemError = function ( url ) { |
|
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| if ( scope.onError !== undefined ) { |
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| scope.onError( url ); |
|
|
| } |
|
|
| }; |
|
|
| this.resolveURL = function ( url ) { |
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| if ( urlModifier ) { |
|
|
| return urlModifier( url ); |
|
|
| } |
|
|
| return url; |
|
|
| }; |
|
|
| this.setURLModifier = function ( transform ) { |
|
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| urlModifier = transform; |
|
|
| return this; |
|
|
| }; |
|
|
| this.addHandler = function ( regex, loader ) { |
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| handlers.push( regex, loader ); |
|
|
| return this; |
|
|
| }; |
|
|
| this.removeHandler = function ( regex ) { |
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| const index = handlers.indexOf( regex ); |
|
|
| if ( index !== - 1 ) { |
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| handlers.splice( index, 2 ); |
|
|
| } |
|
|
| return this; |
|
|
| }; |
|
|
| 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 ]; |
| const loader = handlers[ i + 1 ]; |
|
|
| if ( regex.global ) regex.lastIndex = 0; |
|
|
| if ( regex.test( file ) ) { |
|
|
| return loader; |
|
|
| } |
|
|
| } |
|
|
| return null; |
|
|
| }; |
|
|
| } |
|
|
| } |
|
|
| const DefaultLoadingManager = new LoadingManager(); |
|
|
| export { DefaultLoadingManager, LoadingManager }; |
|
|
