SWT Browser widget does not open target="_blank" links

[flaviodonze]

Describe the bug
Up to Eclipse version 2024-12 if a link with target="_blank" was clicked within a SWT Browser widget a new window with the according link was opened. In 2024-09 this was working, after 2024-12 and with the current integration I20250218-0600 no window is opened.
This happens with the Edge -Dorg.eclipse.swt.browser.DefaultType=edge.

To Reproduce
A standalone SWT snippet to reproduce the behavior (see below).
Also attached a complete project with different target definitions (2024-09, 2024-12, 4.35-builds): browser-app.zip

---

package browserapp;

import org.eclipse.swt.SWT;
import org.eclipse.swt.browser.Browser;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.part.ViewPart;

public class View extends ViewPart {
	public static final String ID = "browser-app.view";

	@Override
	public void createPartControl(Composite parent) {
		parent.setLayout(new RowLayout());
		Button runButton = new Button(parent, SWT.PUSH);
		runButton.setText("open");
		runButton.addSelectionListener(new SelectionAdapter() {
			@Override
			public void widgetSelected(SelectionEvent e) {
				Shell shell = new Shell(Display.getDefault().getActiveShell(), SWT.CLOSE);
				shell.setLayout(new FillLayout(SWT.HORIZONTAL));

				Browser browser = new Browser(shell, SWT.NONE);
				browser.setUrl("https://github.com/eclipse-platform/eclipse.platform.swt");
				shell.open();
			}
		});
	}

	@Override
	public void setFocus() {
	}
}

Expected behavior
target="_blank" link opens a new window.

Environment:

1. Select the platform(s) on which the behavior is seen:

• • All OS
• • Windows
• • Linux
• • macOS

2. Additional OS info (e.g. OS version, Linux Desktop, etc)
   Windows 11

3. JRE/JDK version
   JDK 21.0.6

Version since
Eclipse or SWT version since when the behavior is seen: 2024-12 (4.34)

[sratz]

Thanks for bringing this up. I've created #1846 to change the default and make Edge behave more like IE did.

In general, the behavior is highly platform dependent, as WebKit on Linux/macOS do not support creating new windows out-of-the-box.

As a workaround, you could do

browser.addOpenWindowListener(e -> e.required = false);

[flaviodonze]

Thanks for the workaround, it works great with 2024-12 and I20250218-0600.

To clarify, the test application was executed with -Dorg.eclipse.swt.browser.DefaultType=edge. I edited the issue text.