[Bug 100300] JDK7 looses focus under e16 window manager (original) (raw)

Jaime Peñalba jpenalbae at gmail.com
Wed Feb 27 07:45:11 PST 2013

Last week I reported the following bug: https://bugs.openjdk.java.net/show_bug.cgi?id=100300 but Anthony Petrov suggested me to bring the topic here.

First of all this bug has been introduced on JDK7 as JDK6 works perfectly under enlightenmenet e16 window manager.

To reproduce this bug just run any java application under the window manager e16 using JDK7. All my tests have been done using version "e16-1.0.11" and openjdk-7u6-fcs-src-b24-28_aug_2012.zip. Here are the e16 binaries which I compiled and which I'm using: http://www.painsec.com/writeups/resources/misc/e16-1.0.11-bin.tar.bz2

Steps to reproduce the bug:

The problem is that once the java window loose the focus it never regains it again loosing the ability to input text although mouse clicks still work fine.

I'm not used to X11 programming neither to hacking the OpenJDK, anyway trying to hunt the bug I found that a proper focus event is handled in the following manner:

    at sun.awt.X11.XWindowPeer.handleFocusEvent(XWindowPeer.java:806)

at sun.awt.X11.XDecoratedPeer.handleFocusEvent(XDecoratedPeer.java:225) at sun.awt.X11.XFocusProxyWindow.handleFocusEvent(XFocusProxyWindow.java:77) at sun.awt.X11.XFocusProxyWindow.dispatchEvent(XFocusProxyWindow.java:70) at sun.awt.X11.XBaseWindow.dispatchToWindow(XBaseWindow.java:1066) at sun.awt.X11.XToolkit.dispatchEvent(XToolkit.java:577) at sun.awt.X11.XToolkit.run(XToolkit.java:686) at sun.awt.X11.XToolkit.run(XToolkit.java:607) at java.lang.Thread.run(Thread.java:722)

But under e16 the event gets lost at:

    at sun.awt.X11.XBaseWindow.dispatchToWindow(XBaseWindow.java:1066)

at sun.awt.X11.XToolkit.dispatchEvent(XToolkit.java:577) at sun.awt.X11.XToolkit.run(XToolkit.java:686) at sun.awt.X11.XToolkit.run(XToolkit.java:607

The code sun.awt.X11.XBaseWindow.dispatchToWindow is as follows

/**

* Dispatches event to the grab Window or event source window depending * on whether the grab is active and on the event type */ static void dispatchToWindow(XEvent ev) { XBaseWindow target = XAwtState.getGrabWindow(); if (target == null || !isGrabbedEvent(ev, target)) { target = XToolkit.windowToXWindow(ev.getxany().getwindow()); } if (target != null && target.checkInitialised()) { target.dispatchEvent(ev); } }

After some tinkering I discovered that the obtained "XBaseWindow target" points to a "XContentWindow" object instead of a "XFocusProxyWindow" object as expected, and the "XContentWindow" class extending "XWindow" doesn't have a "dispatchEvent()" method so the event gets lost forever.

I don't know why XContentWindow is catching the event instead of XFocusProxyWindow, looks like the real bug is because of that, but I didn't managed to trace why the event is being associated with XContentWindow.

As an ugly workaround I implemented the "dispatchEvent()" and "handleFocusEvent()" under the "XContentWindow" class calling to "parentFrame.handleFocusEvent(xev)" where parentFrame should be the real main window (XDecoratedPeer). This dirty hack works, but I don't think that this is the way to do it, as JDK6 works fine without implementing these methods under the "XContentWindow" class.

Below is a patch for the dirty workaround:

--- openjdk/jdk/src/solaris/classes/sun/awt/X11/XContentWindow.java

2012-08-29 01:15:20.000000000 +0200 +++ openjdk7-mod/jdk/src/solaris/classes/sun/awt/X11/XContentWindow.java 2013-02-21 00:20:45.174245553 +0100 @@ -184,4 +184,33 @@ public String toString() { return getClass().getName() + "[" + getBounds() + "]"; } + + public void dispatchEvent(XEvent ev) { + int type = ev.gettype(); + + switch (type) + { + case XConstants.FocusIn: + case XConstants.FocusOut: + System.out.println("DISPATCHING FOCUS ON CONTENT WINDOW"); + handleFocusEvent(ev); + break; + } + super.dispatchEvent(ev); + } + + public void handleFocusEvent(XEvent xev) { + int type = xev.gettype(); + + switch (type) + { + case XConstants.FocusIn: + case XConstants.FocusOut: + System.out.println("HANDLING FOCUS EVENT ON CONTENT WINDOW"); + break; + } + + parentFrame.handleFocusEvent(xev); + } + }

This bug is really annoying me as I cannot use JDK7 under e16. Does anyone have idea why the XcontentWindow is raising the event?

Regards, Jaime. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://mail.openjdk.java.net/pipermail/awt-dev/attachments/20130227/dfcab900/attachment.html

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