/*
* Tracks changes of available formats.
* NOTE: This method may be called by privileged threads.
* DO NOT INVOKE CLIENT CODE ON THIS THREAD!
*/
private void checkChange(XSelectionEvent xse) {
final long propertyAtom = xse.get_property();
if (propertyAtom != getTargetsPropertyAtom().getAtom()) {
// wrong atom
return;
}
final XAtom selectionAtom = XAtom.get(xse.get_selection());
final XSelection changedSelection = XSelection.getSelection(selectionAtom);
if (null == changedSelection || changedSelection != selection) {
// unknown selection - do nothing
return;
}
isSelectionNotifyProcessed = true;
if (selection.isOwner()) {
// selection is owner - do not need formats
return;
}
long[] formats = null;
if (propertyAtom == XConstants.None) {
// We treat None property atom as "empty selection".
formats = new long[0];
} else {
WindowPropertyGetter targetsGetter =
new WindowPropertyGetter(
XWindow.getXAWTRootWindow().getWindow(),
XAtom.get(propertyAtom),
0,
XSelection.MAX_LENGTH,
true,
XConstants.AnyPropertyType);
try {
targetsGetter.execute();
formats = XSelection.getFormats(targetsGetter);
} finally {
targetsGetter.dispose();
}
}
checkChange(formats);
}
/** NOTICE: Right now returns only decorated top-levels (not Window) */
static boolean isToplevelWindow(long window) {
if (XToolkit.windowToXWindow(window) instanceof XDecoratedPeer) {
return true;
}
XToolkit.awtLock();
try {
WindowPropertyGetter wpg =
new WindowPropertyGetter(window, XWM.XA_WM_STATE, 0, 1, false, XWM.XA_WM_STATE);
try {
wpg.execute(XErrorHandler.IgnoreBadWindowHandler.getInstance());
if (wpg.getActualType() == XWM.XA_WM_STATE.getAtom()) {
return true;
}
} finally {
wpg.dispose();
}
return false;
} finally {
XToolkit.awtUnlock();
}
}