849172 - Java applets don't get key release events from browser

Status: RESOLVED WONTFIX

(Core Graveyard :: Plug-ins, defect, P3)

Description

[grosskopf]

When I run a java applet in Firefox listening for key events, the applet gets KEY_PRESSED and KEY_TYPED events, but doesn't get KEY_RELEASED events.
I tested this with Mac OS X 10.8.2, Java 1.7.0_17 and FireFox 19.0.2.
The same applet gets KEY_RELEASED events when started in Safari (Mac OS) or FireFox (Windows 7).
This bug can be reproduced always.

Comment 1

[Benjamin Smedberg]

Can you provide a minimal testcase? At this point I don't think this is a priority for my team, so I'd be happy for a volunteer to take this.

Comment 2

[grosskopf]

Attachment: Test case applet

Open KeyReleaseTest.html in Firefox.

Comment 3

[grosskopf]

I added a minimal test case applet.
Open KeyReleaseTest.html in Firefox. You should see the applet as a red box (size 320x200 pixels). When you click it with your mouse you will see "Mouse pressed" on the console. Press a key and the output will be "Key pressed ..." and "Key typed ..." but no "Key released ...".
Here is the source code of the applet:

import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JApplet;

public class KeyReleaseTestApplet extends JApplet {
	
	public void init() {
		addMouseListener( new MouseAdapter() {
			public void mousePressed( MouseEvent e) {
				System.out.println( "Mouse pressed.");
				requestFocus();
			}
		});
		addKeyListener( new KeyListener() {
			
			public void keyTyped( KeyEvent e) {
				System.out.println( "Key typed. e="+e);
			}
			
			public void keyReleased( KeyEvent e) {
				System.out.println( "Key released. e="+e);
			}
			
			public void keyPressed( KeyEvent e) {
				System.out.println( "Key pressed. e="+e);
			}
		});
	}
	
	public void paint(Graphics gr) {
		gr.setColor( Color.red);
		gr.fillRect( 0,0,getWidth(), getHeight());
	}
}

Comment 4

[Benjamin Smedberg]

Thank you!

Comment 5

[Steven Michaud [:smichaud] (Retired)]

Reporter, does this bug also happen with older versions of Firefox?

And if not, would you be willing to test trunk (aka mozilla-central) nightlies to find out in which this bug started happening?

This is something a volunteer could do.  But knowing the regression range might make a volunteer more likely to be interested in working on this bug.

Comment 6

[grosskopf]

This bug appears in older versions, too. Probably since Firefox 13:

http://support.mozilla.org/de/questions/944755

Comment 7

[Scoobidiver (away)]

Can you run https://github.com/mozilla/mozregression to find a regression range?

Comment 8

[Benjamin Smedberg]

So far we don't know that it ever worked.

Comment 9

[grosskopf]

Running the mozregression tool I found that key released events worked until nightly build from 2011-01-20. In 2011-01-21 it is broken.

Comment 10

[Scoobidiver (away)]

The regression range is http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=efbf1fa4c70e&tochange=8d52e3b68ca6
I suspect bug 583499.

Comment 11

[Benjamin Smedberg]

That's a bit surprising, but I don't see anything else in the range.

Comment 12

[grosskopf]

I have an additional information:
The bug only appears with Java 7.

Comment 13

[grosskopf]

Since Java 1.7.0_21 it is broken in Safari, too. So maybe this is an Jave/Oracle issue.

Comment 14

[Virtual_ManPL [:Virtual] 🇵🇱 - (please needinfo? me - so I will see your comment/reply/question/etc.)]

I'm marking this bug as WONTFIX per bug #1269807.

For more information see - https://blog.mozilla.org/futurereleases/2015/10/08/npapi-plugins-in-firefox/