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
* Accept the current proposal.
		 */
		private void acceptCurrentProposal() {
			proposalAccepted(getSelectedProposal());
			close();
		}
		/*
		 * Request the proposals from the proposal provider, and recompute any
		 * caches. Repopulate the popup if it is open.
		 */
		private void recomputeProposals(String filterText) {
			setProposals(getProposals(filterText));
		}
		/*
		 * Filter the provided list of content proposals according to the filter
		 * text.
		 */
		private IContentProposal[] filterProposals(
				IContentProposal[] proposals, String filterString) {
			if (filterString.length() == 0)
				return proposals;
			
			
			
			ArrayList list = new ArrayList();
			for (int i = 0; i < proposals.length; i++) {
				String string = getString(proposals[i]);
				if (string.length() >= filterString.length()
						&& string.substring(0, filterString.length())
								.equalsIgnoreCase(filterString))