Bug 43207 Javadoc info for content assist only shown once
I20030916 Javadoc infos for content assist are only shown the first time an editor is opened. Afterwards, no javadoc is shown any more. - open a java source file (e.g. public class A { }) - Press Ctrl+Space to invoke content assist => works: selection in proposal list shows javadoc hover (if javadoc available) - Press Esc, press Ctrl+Space again => fails: selection in proposal list does not make any javadocs appear
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/link/contentassist/CompletionProposalPopup2.java
* 
	 * @return the location of this popup
	 */
	private Point getLocation() {
		StyledText text= fViewer.getTextWidget();
		Point selection= text.getSelection();
		Point p= text.getLocationAtOffset(selection.x);
		
		p.x -= fProposalShell.getBorderWidth();
		if (p.x < 0) p.x= 0;
		if (p.y < 0) p.y= 0;
		p= new Point(p.x, p.y + text.getLineHeight());
		p= text.toDisplay(p);
		if (p.x < 0) p.x= 0;
		if (p.y < 0) p.y= 0;
		return p;
	}
	/**
	 *Displays this popup and install the additional info controller, so that additional info
	 * is displayed when a proposal is selected and additional info is available.
	 */
	private void displayProposals() {
		if (fContentAssistant.addContentAssistListener(this, ContentAssistant2.PROPOSAL_SELECTOR)) {
			
			if (fDocumentListener == null)
				fDocumentListener=  new IDocumentListener()  {
					public void documentAboutToBeChanged(DocumentEvent event) {
						if (!fInserting)
							fDocumentEvents.add(event);
					}