Bug 271339 [FieldAssist] Add CC text field content assist doesn't work as expected when narrowing suggestions
Continued typing in the text field should narrow the list of results displayed in the suggest list. On Carbon, this is how it works: # Open any Bugzilla bug in the Mylyn task editor # position the caret in the 'Add CC' field # press CTRL+Space # observe suggested values # start typing (slowly) 'dg' # notice that with each successive character the list is narrowed to fewer matching results # start typing backspace (slowly) to delete the characters in the text field # notice that the list is expanded to show additional matching results as the characters are deleted On Cocoa, typing in the text field after the suggest list is displayed causes the suggest list to go away.
bundles/org.eclipse.jface/src/org/eclipse/jface/fieldassist/ContentProposalAdapter.java
*            that the content of the popup will be filtered by the most
	 *            recently typed character. <code>FILTER_CUMULATIVE</code> is
	 *            deprecated and no longer recommended. It specifies that the
	 *            content of the popup will be filtered by a string containing
	 *            all the characters typed since the popup has been open.
	 */
	public void setFilterStyle(int filterStyle) {
		this.filterStyle = filterStyle;
	}
	/**
	 * Return the size, in pixels, of the content proposal popup.
	 * 
	 * @return a Point specifying the last width and height, in pixels, of the
	 *         content proposal popup.
	 */
	public Point getPopupSize() {
		return popupSize;
	}
	/**
	 * Set the size, in pixels, of the content proposal popup. This size will be
	 * used the next time the content proposal popup is opened.
	 * 
	 * @param size
	 *            a Point specifying the desired width and height, in pixels, of
	 *            the content proposal popup.
	 */
	public void setPopupSize(Point size) {
		popupSize = size;
	}
	/**