SunClipboard.java 文件源码

/**
 * Checks change of the {@code DataFlavor}s and, if necessary,
 * posts notifications on {@code FlavorEvent}s to the
 * AppContexts' EDTs.
 * The parameter {@code formats} is null iff we have just
 * failed to get formats available on the clipboard.
 *
 * @param formats data formats that have just been retrieved from
 *        this clipboard
 */
protected final void checkChange(final long[] formats) {
    if (Arrays.equals(formats, currentFormats)) {
        // we've been able to successfully get available on the clipboard
        // DataFlavors this and previous time and they are coincident;
        // don't notify
        return;
    }
    currentFormats = formats;

    for (final AppContext appContext : AppContext.getAppContexts()) {
        if (appContext == null || appContext.isDisposed()) {
            continue;
        }
        Set<FlavorListener> flavorListeners = getFlavorListeners(appContext);
        if (flavorListeners != null) {
            for (FlavorListener listener : flavorListeners) {
                if (listener != null) {
                    PeerEvent peerEvent = new PeerEvent(this,
                            () -> listener.flavorsChanged(new FlavorEvent(SunClipboard.this)),
                            PeerEvent.PRIORITY_EVENT);
                    SunToolkit.postEvent(appContext, peerEvent);
                }
            }
        }
    }
}