HostServices.showDocument does not work on Mac

[mipastgt]

HostServices.showDocument does not work on Mac. It fails with a message saying that
AWT is currently not supported on Substrate VM. This is due to the fact that, only on the Mac, the HostServicesDelegate calls Desktop.getDesktop().browse to launch a browser. For other platforms Runtime.getRuntime().exec is used. I am wondering why this is not also done for the Mac. The single line Runtime.getRuntime().exec(new String[]{"open", uri}); would do the trick and is even better than, e.g., the current Linux variant which just searches through a list of browser names and picks the first one it finds. This change would fix the problem on Substrate VM and also remove the dependency on java.awt.Desktop. I have tested this on a standard VM as well as with substrate via the client-maven-plugin and it works without problem.

macOS 10.14.6
GraalVM 19.3.1
client-maven-plugin 0.1.15
jfx 15-ea+1

[jperedadnr]

Sorry for the late reply. Indeed it is weird that OpenJFX uses java.desktop only for Mac, and Runtime for the other platforms. This should be filed as a JBS issue that modifies the change that was done for https://bugs.openjdk.java.net/browse/JDK-8170624.
In the meantime, BrowserService in Attach 4.0.13 has now the implementation for desktop
https://github.com/gluonhq/attach/blob/master/modules/browser/src/main/java/com/gluonhq/attach/browser/impl/DesktopBrowserService.java
and this can be used on Mac instead of HostServices.

[mipastgt]

https://bugs.openjdk.java.net/browse/JDK-8274297