Attachment 284985 Details for Bug 569529 – Reproducing snippet

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Reproducing snippet

Bug569529_macOS_LinkEatsCPU.java (text/plain), 1.72 KB, created by Alexandr Miloslavskiy

on 2020-12-07 13:28:12 EST

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Filename:

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Creator: Alexandr Miloslavskiy

Created: 2020-12-07 13:28:12 EST

Size: 1.72 KB

patch

obsolete

>/*******************************************************************************
> * Copyright (c) 2020 Syntevo and others.
> *
> * This program and the accompanying materials
> * are made available under the terms of the Eclipse Public License 2.0
> * which accompanies this distribution, and is available at
> * https://www.eclipse.org/legal/epl-2.0/
> *
> * SPDX-License-Identifier: EPL-2.0
> *
> * Contributors:
> *     Syntevo - initial API and implementation
> *******************************************************************************/
>
>import org.eclipse.swt.SWT;
>import org.eclipse.swt.layout.GridLayout;
>import org.eclipse.swt.widgets.*;
>
>import java.util.ArrayList;
>
>public class Bug569529_macOS_LinkEatsCPU {
>	public static void main(String[] args) {
>		System.setProperty("org.eclipse.swt.display.useSystemTheme", "true");
>
>		final Display display = new Display();
>
>		final Shell shell = new Shell(display);
>		shell.setLayout(new GridLayout(1, true));
>
>		final Label hint = new Label(shell, 0);
>		hint.setText(
>			"1) Use macOS with Dark Theme\n" +
>			"2) Notice that snippet constantly hogs CPU\n" +
>			"3) On macOS 11.0 BigSur, even invisible links will cause the problem"
>		);
>
>		final ArrayList<Link> links = new ArrayList<>();
>		Button btnShowHide = new Button(shell, 0);
>		btnShowHide.setText("Show/hide links");
>		btnShowHide.addListener(SWT.Selection, event -> {
>			for (Link link : links)
>			{
>				link.setVisible(!link.getVisible());
>			}
>		});
>
>		for (int i = 0; i < 10; i++)
>		{
>			Link link = new Link(shell, 0);
>			links.add(link);
>			link.setText("<a>This is link#" + i + "</a>");
>		}
>
>		shell.pack();
>		shell.open();
>
>		while (!shell.isDisposed()) {
>			if (!display.readAndDispatch()) {
>				display.sleep();
>			}
>		}
>
>		display.dispose();
>	}
>}

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Attachments on bug 569529: 284985