On Wednesday, August 23, 2017 at 1:29:51 PM UTC+2, Kirill Prazdnikov wrote:
>
> Is the FileReader "instanceof $wnd.FileReader"? (Walk up the chain)
>
>
> What is interesting, FileReader created with JSNI *is not*
> isInstanceOfFileReader,
>
> public static native FileReader newFileReader() /*-{
> return new FileReader();
> }-*/;
>
>
> but FileReader created with jsType and jsConstructor *is *
> isInstanceOfFileReader
>
> @JsType(isNative = true) public class FileReader { public FileReader() {}
> };
>
> isInstanceOfFileReader(fileReader) = true
>> isInstanceOfFileReader(fileReader2) = false
>
>
> The same for ArrayBuffer, one created with JSNI not a buffer passing
> isInstanceOfArrayBuffer, but one created with "new ArrayBuffer(10)" form
> java is passing isInstanceOfArrayBuffer.
>
> Both FileReaders can read files and both ArrayBuffer returned form reading
> *IS
> NOT *passing isInstanceOfArrayBuffer.
>
Using your JSNI above, the objects are created in an iframe (the one the
*.nocache.js creates and then loads *.cache.js into); the ones from
JsInterop are (correctly/expectedly) created in the HTML host page.
As Tony said, use $wnd.FileReader rather than FileReader (or better yet,
use JsInterop).
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