/** Override to improve matching accuracy */
@Override
public ICompletionProposal[] computeCompletionProposals(ITextViewer viewer, int offset) {
ITextSelection selection = (ITextSelection) viewer.getSelectionProvider().getSelection();
// adjust offset to end of normalized selection
if (selection.getOffset() == offset) {
offset = selection.getOffset() + selection.getLength();
}
String prefix = extractPrefix(viewer, offset);
Region region = new Region(offset - prefix.length(), prefix.length());
TemplateContext context = createContext(viewer, region);
if (context == null) {
return new ICompletionProposal[0];
}
Region selectionRegion = new Region(selection.getOffset(), selection.getLength());
TemplateContext selectionContext = createContext(viewer, selectionRegion);
int lineOffset = 0;
try {
IRegion lineInformationOfOffset = viewer.getDocument().getLineInformationOfOffset(offset);
lineOffset = offset - lineInformationOfOffset.getOffset();
} catch (BadLocationException e1) {
// ignore
}
String selectionText = selection.getText();
context.setVariable("selection", selectionText); // $NON-NLS-1$
selectionContext.setVariable("selection", selectionText); // $NON-NLS-1$
context.setVariable("text", selectionText); // $NON-NLS-1$
selectionContext.setVariable("text", selectionText); // $NON-NLS-1$
Template[] templates = getTemplates(context.getContextType().getId());
List<ICompletionProposal> matches = new ArrayList<>(templates.length);
for (Template template : templates) {
try {
context.getContextType().validate(template.getPattern());
} catch (TemplateException e) {
continue;
}
if (!template.matches(prefix, context.getContextType().getId())) {
continue;
}
boolean selectionBasedMatch = isSelectionBasedMatch(template, context);
if (template.getName().startsWith(prefix) || selectionBasedMatch) {
int relevance = getRelevance(template, lineOffset, prefix);
if (selectionBasedMatch) {
matches.add(
createProposal(template, selectionContext, (IRegion) selectionRegion, relevance));
} else {
matches.add(createProposal(template, context, (IRegion) region, relevance));
}
}
}
Collections.sort(matches, proposalComparator);
return matches.toArray(new ICompletionProposal[matches.size()]);
}
