load method

@override dynamic load(dynamic url, Function onLoad, [ Function? onProgress, Function? onError, ])

Implementation

@override
load(url, Function onLoad, [Function? onProgress, Function? onError]) async {
  url ??= '';

  url = path + url;

  url = manager.resolveURL(url);

  FileLoader scope = this;

  var cached = Cache.get(url);

  if (cached != null) {
    scope.manager.itemStart(url);

    onLoad(cached);
    scope.manager.itemEnd(url);

    return cached;
  }

  // Check if request is duplicate

  if (loading[url] != null) {
    loading[url].add(
        {"onLoad": onLoad, "onProgress": onProgress, "onError": onError});

    return;
  }

  // Check for data: URI
  RegExp dataUriRegex = RegExp(r"^data:(.*?)(;base64)?,(.*)$");
  RegExpMatch? dataUriRegexResult = dataUriRegex.firstMatch(url);
  var request;

  // Safari can not handle Data URIs through XMLHttpRequest so process manually
  if (dataUriRegex.hasMatch(url)) {
    RegExpMatch? dataUriRegexResult = dataUriRegex.firstMatch(url)!;

    String? mimeType = dataUriRegexResult.group(1);
    bool isBase64 = dataUriRegexResult.group(2) != null;

    String? data = dataUriRegexResult.group(3)!;
    // data = decodeURIComponent( data );

    Uint8List? base64Data;

    if (isBase64) base64Data = convert.base64.decode(data);

    // try {

    var response;
    String responseType = (this.responseType).toLowerCase();

    switch (responseType) {
      case 'arraybuffer':
      case 'blob':
        if (responseType == 'blob') {
          // response = new Blob( [ view.buffer ], { type: mimeType } );
          throw (" FileLoader responseType: $responseType need support .... ");
        } else {
          response = base64Data;
        }

        break;

      case 'document':

        // var parser = new DOMParser();
        // response = parser.parseFromString( data, mimeType );

        throw ("FileLoader responseType: $responseType is not support ....  ");

        break;

      case 'json':
        response = convert.jsonDecode(data);

        break;

      default: // 'text' or other

        response = data;

        break;
    }

    // Wait for next browser tick like standard XMLHttpRequest event dispatching does
    Future.delayed(Duration.zero, () {
      onLoad(response);

      scope.manager.itemEnd(url);
    });

    // } catch ( error ) {

    // Wait for next browser tick like standard XMLHttpRequest event dispatching does
    // setTimeout( function () {

    // 	if ( onError ) onError( error );

    // 	scope.manager.itemError( url );
    // 	scope.manager.itemEnd( url );

    // }, 0 );

    //   Future.delayed(Duration.zero, () {

    // 		if ( onError != null ) onError( error );

    // 		scope.manager.itemError( url );
    // 		scope.manager.itemEnd( url );

    //   });

    // }

    return;
  }

  // Initialise array for duplicate requests

  loading[url] = [];

  loading[url]
      .add({"onLoad": onLoad, "onProgress": onProgress, "onError": onError});

  var callbacks = loading[url];

  dynamic respData;
  if (!kIsWeb && !url.startsWith("http")) {
    if (url.startsWith("assets") || url.startsWith("packages")) {
      if (responseType == "text") {
        respData = await rootBundle.loadString(url);
      } else {
        ByteData resp = await rootBundle.load(url);
        respData = Uint8List.view(resp.buffer);
      }
    } else {
      var file = File(url);

      if (responseType == "text") {
        respData = await file.readAsString();
      } else {
        respData = await file.readAsBytes();
      }
    }
  } else {
    if (url.startsWith("assets") || url.startsWith("packages")) {
      if (!kIsWeb)  // GL seems to cause an issue on web
        url = "assets/" + url;
    }

    http.Response response = await http.get(Uri.parse(url));

    if (response.statusCode != 200) {
      for (var i = 0, il = callbacks.length; i < il; i++) {
        var callback = callbacks[i];
        if (callback["onError"] != null) callback["onError"](response.body);
      }

      scope.manager.itemError(url);
      scope.manager.itemEnd(url);
    }

    if (responseType == "text") {
      respData = response.body;
    } else {
      respData = response.bodyBytes;
    }
  }

  loading.remove(url);

  // Add to cache only on HTTP success, so that we do not cache
  // error response bodies as proper responses to requests.
  Cache.add(url, respData);

  for (var i = 0, il = callbacks.length; i < il; i++) {
    var callback = callbacks[i];
    if (callback["onLoad"] != null) callback["onLoad"](respData);
  }

  scope.manager.itemEnd(url);

  return respData;

  // request = new XMLHttpRequest();
  // request.open( 'GET', url, true );
  // request.addEventListener( 'load', ( event ) {

  //   var response = this.response;

  //   var callbacks = loading[ url ];

  //   delete loading[ url ];

  //   if ( this.status == 200 || this.status == 0 ) {

  //     // Some browsers return HTTP Status 0 when using non-http protocol
  //     // e.g. 'file://' or 'data://'. Handle as success.

  //     if ( this.status == 0 ) {
  //       print( 'THREE.FileLoader: HTTP Status 0 received.' );
  //     }

  //     // Add to cache only on HTTP success, so that we do not cache
  //     // error response bodies as proper responses to requests.
  //     Cache.add( url, response );

  //     for ( var i = 0, il = callbacks.length; i < il; i ++ ) {

  //       var callback = callbacks[ i ];
  //       if ( callback.onLoad ) callback.onLoad( response );

  //     }

  //     scope.manager.itemEnd( url );

  //   } else {

  //     for ( var i = 0, il = callbacks.length; i < il; i ++ ) {

  //       var callback = callbacks[ i ];
  //       if ( callback.onError ) callback.onError( event );

  //     }

  //     scope.manager.itemError( url );
  //     scope.manager.itemEnd( url );

  //   }

  // }, false );

  // request.addEventListener( 'progress', ( event ) {

  //   var callbacks = loading[ url ];

  //   for ( var i = 0, il = callbacks.length; i < il; i ++ ) {

  //     var callback = callbacks[ i ];
  //     if ( callback.onProgress ) callback.onProgress( event );

  //   }

  // }, false );

  // request.addEventListener( 'error', ( event ) {

  //   var callbacks = loading[ url ];

  //   delete loading[ url ];

  //   for ( var i = 0, il = callbacks.length; i < il; i ++ ) {

  //     var callback = callbacks[ i ];
  //     if ( callback.onError ) callback.onError( event );

  //   }

  //   scope.manager.itemError( url );
  //   scope.manager.itemEnd( url );

  // }, false );

  // request.addEventListener( 'abort', ( event ) {

  //   var callbacks = loading[ url ];

  //   delete loading[ url ];

  //   for ( var i = 0, il = callbacks.length; i < il; i ++ ) {

  //     var callback = callbacks[ i ];
  //     if ( callback.onError ) callback.onError( event );

  //   }

  //   scope.manager.itemError( url );
  //   scope.manager.itemEnd( url );

  // }, false );

  // if ( this.responseType != null ) request.responseType = this.responseType;
  // if ( this.withCredentials != null ) request.withCredentials = this.withCredentials;

  // if ( request.overrideMimeType ) request.overrideMimeType( this.mimeType != null ? this.mimeType : 'text/plain' );

  // for ( var header in this.requestHeader ) {

  //   request.setRequestHeader( header, this.requestHeader[ header ] );

  // }

  // request.send( null );

  // scope.manager.itemStart( url );

  // return request;
}