/** Recycles the passed in <code>HeavyWeightPopup</code>. */
private static void recycleHeavyWeightPopup(HeavyWeightPopup popup) {
synchronized (HeavyWeightPopup.class) {
List<HeavyWeightPopup> cache;
Window window = SwingUtilities.getWindowAncestor(popup.getComponent());
Map<Window, List<HeavyWeightPopup>> heavyPopupCache = getHeavyWeightPopupCache();
if (window instanceof Popup.DefaultFrame || !window.isVisible()) {
// If the Window isn't visible, we don't cache it as we
// likely won't ever get a windowClosed event to clean up.
// We also don't cache DefaultFrames as this indicates
// there wasn't a valid Window parent, and thus we don't
// know when to clean up.
popup._dispose();
return;
} else if (heavyPopupCache.containsKey(window)) {
cache = heavyPopupCache.get(window);
} else {
cache = new ArrayList<HeavyWeightPopup>();
heavyPopupCache.put(window, cache);
// Clean up if the Window is closed
final Window w = window;
w.addWindowListener(
new WindowAdapter() {
public void windowClosed(WindowEvent e) {
List<HeavyWeightPopup> popups;
synchronized (HeavyWeightPopup.class) {
Map<Window, List<HeavyWeightPopup>> heavyPopupCache2 =
getHeavyWeightPopupCache();
popups = heavyPopupCache2.remove(w);
}
if (popups != null) {
for (int counter = popups.size() - 1; counter >= 0; counter--) {
popups.get(counter)._dispose();
}
}
}
});
}
if (cache.size() < MAX_CACHE_SIZE) {
cache.add(popup);
} else {
popup._dispose();
}
}
}
/** Returns either a new or recycled <code>Popup</code> containing the specified children. */
static Popup getHeavyWeightPopup(Component owner, Component contents, int ownerX, int ownerY) {
Window window = (owner != null) ? SwingUtilities.getWindowAncestor(owner) : null;
HeavyWeightPopup popup = null;
if (window != null) {
popup = getRecycledHeavyWeightPopup(window);
}
boolean focusPopup = false;
if (contents != null && contents.isFocusable()) {
if (contents instanceof JPopupMenu) {
JPopupMenu jpm = (JPopupMenu) contents;
Component popComps[] = jpm.getComponents();
for (Component popComp : popComps) {
if (!(popComp instanceof MenuElement) && !(popComp instanceof JSeparator)) {
focusPopup = true;
break;
}
}
}
}
if (popup == null
|| ((JWindow) popup.getComponent()).getFocusableWindowState() != focusPopup) {
if (popup != null) {
// The recycled popup can't serve us well
// dispose it and create new one
popup._dispose();
}
popup = new HeavyWeightPopup();
}
popup.reset(owner, contents, ownerX, ownerY);
if (focusPopup) {
JWindow wnd = (JWindow) popup.getComponent();
wnd.setFocusableWindowState(true);
// Set window name. We need this in BasicPopupMenuUI
// to identify focusable popup window.
wnd.setName("###focusableSwingPopup###");
}
return popup;
}
/** Creates a heavy weight popup. */
private Popup getHeavyWeightPopup(Component owner, Component contents, int ownerX, int ownerY) {
if (GraphicsEnvironment.isHeadless()) {
return getMediumWeightPopup(owner, contents, ownerX, ownerY);
}
return HeavyWeightPopup.getHeavyWeightPopup(owner, contents, ownerX, ownerY);
}
