FileDialog on macOS Sequoia/Tahoe returns wrong extension (and appends it twice)

[orionll]

To Reproduce

1. Run the following slightly modified Snippet 72:

import org.eclipse.swt.widgets.FileDialog;

import org.eclipse.swt.*;
import org.eclipse.swt.widgets.*;

public class Main {
	public static void main(String[] args) {
		Display display = new Display();
		Shell shell = new Shell(display);
		shell.setText("Snippet 72");
		shell.open();
		FileDialog dialog = new FileDialog(shell, SWT.SAVE);
		String[] filterNames = new String[] { "ABC (*.abcd)", "PNG (*.png)", "JPG (*.jpg)" };
		String[] filterExtensions = new String[] { "*.abcd", "*.png", "*.jpg" };
		dialog.setFilterNames(filterNames);
		dialog.setFilterExtensions(filterExtensions);
		dialog.setFileName("myfile");
		dialog.setOverwrite(true);
		System.out.println("Save to: " + dialog.open());
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}
}

2. When a macOS file dialog is shown, select the second file extension (i.e. *.png).
3. Click Save

The program prints .../myfile.abcd.abcd.

Expected behavior
The program must have printed .../myfile.png instead.

Environment:
macOS Sequoia
macOS Tahoe

(older versions of macOS aren't affected)

[fedejeanne]

Thank you for reporting it @orionll ! Would you be open to provide a PR to fix this issue?

[orionll]

@fedejeanne I'm primarily a Windows developer, so I have no knowledge of macOS API and programming model. From what I googled, it looks like the method NSSavePanel.filename was deprecated many years ago (in OS X 10.7 Lion). The doc says to use NSSavePanel.URL instead. Can someone who knows macOS programming model better than me make this replacement?

[vogella]

Lets try Copilot for this.

[vogella]

@orionll or @fedejeanne can you test the suggested change? I have no Mac

[elsazac]

with the above snippet, for me, its still printing .../myfile.abcd.abcd instead of .../myfile.png