Bug 147377 [Field Assist] - open proposal popup should close when there are no valid proposals left
bundles/org.eclipse.jface/src/org/eclipse/jface/fieldassist/ContentProposalAdapter.java
}
					}
					/*
					 * The triggering keystroke was not invoked. Check for
					 * autoactivation characters.
					 */
					if (e.character != 0) {
						boolean autoActivated = false;
						
						
						if (autoActivateString != null) {
							if (autoActivateString.indexOf(e.character) >= 0) {
								autoActivated = true;
							}
							
							
							
						} else if (triggerKeyStroke == null
								&& Character.isLetterOrDigit(e.character)) {
							autoActivated = true;
						}
						/*
						 * When autoactivating, we check the autoactivation
						 * delay.
						 */
						if (autoActivated) {
							e.doit = propagateKeys;
							if (autoActivationDelay > 0) {
								Runnable runnable = new Runnable() {
									public void run() {