Name: yyT116575 Date: 07/19/2001


java version "1.3.1"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1-b24)
Java HotSpot(TM) Client VM (build 1.3.1-b24, mixed mode)


Create a simple java program that displays a window (code to follow). The
window title begins with 'Esc'(B then the title string. This can be seen
most easily on the FVWM window manager compiled without multi-byte support.

If $LANG and $LC_CTYPE are set to en_US.ISO8859-1 or just about any other
language, then multi-byte chars are sent to the title bar of a window.


I used "xprop" to look at the property WM_NAME which is where the title
comes from.

Without LANG set, Java sets WM_NAME like this:
WM_NAME(COMPOUND_TEXT) = 0x54, 0x68, 0x69, 0x73, ...

With LANG set, Java sets WM_NAME like this:
WM_NAME(COMPOUND_TEXT) = 0x1b, 0x28, 0x42, 0x54, ...

The 0x54 is the first character of the windows title, an uppercase T.

So with LANG set, the characters "0x1b, 0x28, 0x42," ("Esc ( B") are
added to the window title.

If Fvwm is compiled with multibyte support, that string is passed thru
XmbTextPropertyToTextList() which removes the "Esc ( B" prefix.

I think this should be persued with Sun. So far I see 2 issues:

I don't see why fvwm should need to support Multibyte characters when
the language is explicitly set to en_US, or fr_CA, neither of these
languages are multibyte.

I don't think it's correct for Java to be setting the text property to
COMPOUND_TEXT when LANG isn't set. Normally the property on a title
would be STRING.

Here is the code to reproduce:
import javax.swing.*;

public class WindowTest {
  static void main (String[] args) {
    JFrame win = new JFrame ("This is the window Title");
    //win.setTitle ("Window Title 2");
    win.getContentPane().add (new JLabel ("Test the JWindow"));
    win.setSize (200, 200);
    win.pack();
    win.show ();
  }
}

Here is a url to image of the window created:

http://www.employees.org/~keiths/WindowTest.gif

I am running on Solaris 8 with FVWM 2.4.0. I've tested this in both 1.3.1 and
Java 1.4-beta.
(Review ID: 128437)
======================================================================