Initial commit

HTML/ThreeJS/node_modules/three/src/loaders/FileLoader.js

@@ -0,0 +1,270 @@
+import { Cache } from './Cache.js';
+import { Loader } from './Loader.js';
+
+const loading = {};
+
+class FileLoader extends Loader {
+
+	constructor( manager ) {
+
+		super( manager );
+
+	}
+
+	load( url, onLoad, onProgress, onError ) {
+
+		if ( url === undefined ) url = '';
+
+		if ( this.path !== undefined ) url = this.path + url;
+
+		url = this.manager.resolveURL( url );
+
+		const cached = Cache.get( url );
+
+		if ( cached !== undefined ) {
+
+			this.manager.itemStart( url );
+
+			setTimeout( () => {
+
+				if ( onLoad ) onLoad( cached );
+
+				this.manager.itemEnd( url );
+
+			}, 0 );
+
+			return cached;
+
+		}
+
+		// Check if request is duplicate
+
+		if ( loading[ url ] !== undefined ) {
+
+			loading[ url ].push( {
+
+				onLoad: onLoad,
+				onProgress: onProgress,
+				onError: onError
+
+			} );
+
+			return;
+
+		}
+
+		// Initialise array for duplicate requests
+		loading[ url ] = [];
+
+		loading[ url ].push( {
+			onLoad: onLoad,
+			onProgress: onProgress,
+			onError: onError,
+		} );
+
+		// create request
+		const req = new Request( url, {
+			headers: new Headers( this.requestHeader ),
+			credentials: this.withCredentials ? 'include' : 'same-origin',
+			// An abort controller could be added within a future PR
+		} );
+
+		// record states ( avoid data race )
+		const mimeType = this.mimeType;
+		const responseType = this.responseType;
+
+		// start the fetch
+		fetch( req )
+			.then( response => {
+
+				if ( response.status === 200 || response.status === 0 ) {
+
+					// Some browsers return HTTP Status 0 when using non-http protocol
+					// e.g. 'file://' or 'data://'. Handle as success.
+
+					if ( response.status === 0 ) {
+
+						console.warn( 'THREE.FileLoader: HTTP Status 0 received.' );
+
+					}
+
+					// Workaround: Checking if response.body === undefined for Alipay browser #23548
+
+					if ( typeof ReadableStream === 'undefined' || response.body === undefined || response.body.getReader === undefined ) {
+
+						return response;
+
+					}
+
+					const callbacks = loading[ url ];
+					const reader = response.body.getReader();
+					const contentLength = response.headers.get( 'Content-Length' );
+					const total = contentLength ? parseInt( contentLength ) : 0;
+					const lengthComputable = total !== 0;
+					let loaded = 0;
+
+					// periodically read data into the new stream tracking while download progress
+					const stream = new ReadableStream( {
+						start( controller ) {
+
+							readData();
+
+							function readData() {
+
+								reader.read().then( ( { done, value } ) => {
+
+									if ( done ) {
+
+										controller.close();
+
+									} else {
+
+										loaded += value.byteLength;
+
+										const event = new ProgressEvent( 'progress', { lengthComputable, loaded, total } );
+										for ( let i = 0, il = callbacks.length; i < il; i ++ ) {
+
+											const callback = callbacks[ i ];
+											if ( callback.onProgress ) callback.onProgress( event );
+
+										}
+
+										controller.enqueue( value );
+										readData();
+
+									}
+
+								} );
+
+							}
+
+						}
+
+					} );
+
+					return new Response( stream );
+
+				} else {
+
+					throw Error( `fetch for "${response.url}" responded with ${response.status}: ${response.statusText}` );
+
+				}
+
+			} )
+			.then( response => {
+
+				switch ( responseType ) {
+
+					case 'arraybuffer':
+
+						return response.arrayBuffer();
+
+					case 'blob':
+
+						return response.blob();
+
+					case 'document':
+
+						return response.text()
+							.then( text => {
+
+								const parser = new DOMParser();
+								return parser.parseFromString( text, mimeType );
+
+							} );
+
+					case 'json':
+
+						return response.json();
+
+					default:
+
+						if ( mimeType === undefined ) {
+
+							return response.text();
+
+						} else {
+
+							// sniff encoding
+							const re = /charset="?([^;"\s]*)"?/i;
+							const exec = re.exec( mimeType );
+							const label = exec && exec[ 1 ] ? exec[ 1 ].toLowerCase() : undefined;
+							const decoder = new TextDecoder( label );
+							return response.arrayBuffer().then( ab => decoder.decode( ab ) );
+
+						}
+
+				}
+
+			} )
+			.then( data => {
+
+				// Add to cache only on HTTP success, so that we do not cache
+				// error response bodies as proper responses to requests.
+				Cache.add( url, data );
+
+				const callbacks = loading[ url ];
+				delete loading[ url ];
+
+				for ( let i = 0, il = callbacks.length; i < il; i ++ ) {
+
+					const callback = callbacks[ i ];
+					if ( callback.onLoad ) callback.onLoad( data );
+
+				}
+
+			} )
+			.catch( err => {
+
+				// Abort errors and other errors are handled the same
+
+				const callbacks = loading[ url ];
+
+				if ( callbacks === undefined ) {
+
+					// When onLoad was called and url was deleted in `loading`
+					this.manager.itemError( url );
+					throw err;
+
+				}
+
+				delete loading[ url ];
+
+				for ( let i = 0, il = callbacks.length; i < il; i ++ ) {
+
+					const callback = callbacks[ i ];
+					if ( callback.onError ) callback.onError( err );
+
+				}
+
+				this.manager.itemError( url );
+
+			} )
+			.finally( () => {
+
+				this.manager.itemEnd( url );
+
+			} );
+
+		this.manager.itemStart( url );
+
+	}
+
+	setResponseType( value ) {
+
+		this.responseType = value;
+		return this;
+
+	}
+
+	setMimeType( value ) {
+
+		this.mimeType = value;
+		return this;
+
+	}
+
+}
+
+
+export { FileLoader };