Bug 125012 [Field Assist] Clarify lifecycle of the ILabelProvider used by ContentProposalAdapter
I20060119-0800 Clients who want to port their field content assistants from jface.text.contentassist to jface.fieldassist would expect to be able to supply an image in IContentProposal, e.g. with a 'Image getImage();' method as in ICompletionProposal. Without icons, e.g. proposals for java type names would look quite different from the ones you get in the java editor. There's also a lot more functionality in ICompletionProposal and the 4 ICompletionProposalExtension* interfaces. Some of those concepts must also be supported in fieldassist if clients such as the Find/Replace dialog and Java type completions in dialogs should switch (e.g. the additionalProposalInfo to show documentation for regex proposals, etc.). I can file separate bugs for these functionalities if you want to discuss them one by one.
bundles/org.eclipse.jface/src/org/eclipse/jface/fieldassist/ContentProposalAdapter.java
* Set the boolean flag that determines whether the adapter is enabled.
	 * 
	 * @param enabled
	 *            <code>true</code> if the adapter is enabled and responding
	 *            to user input, <code>false</code> if it is ignoring user
	 *            input.
	 * 
	 */
	public void setEnabled(boolean enabled) {
		
		
		if (isEnabled && !enabled) {
			if (popup != null)
				popup.close();
		}
		isEnabled = enabled;
	}
	/**
	 * Add the specified listener to the list of content proposal listeners that
	 * are notified when content proposals are chosen.
	 * </p>
	 * 
	 * @param listener
	 *            the IContentProposalListener to be added as a listener. Must
	 *            not be <code>null</code>. If an attempt is made to register
	 *            an instance which is already registered with this instance,
	 *            this method has no effect.
	 * 
	 * @see org.eclipse.jface.fieldassist.IContentProposalListener
	 */