Fix highlighting in search suggestions

The provided suggestions should highlight the part that the user has
already typed as bold text. Currently this only works for the first
operator. For suggestions of any further operator no hightlighting is
done.

Change-Id: I0764d412c2fb7913d53b359409d32c208837c6e3
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>

gerrit-gwtui/src/main/java/com/google/gerrit/client/SearchSuggestOracle.java

@@ -93,17 +93,12 @@ public class SearchSuggestOracle extends HighlightSuggestOracle {
   @Override
   protected void onRequestSuggestions(Request request, Callback done) {
     final String query = request.getQuery();
-    int lastSpace = query.lastIndexOf(' ');
-    final String lastWord;
-    // NOTE: this method is not called if the query is empty.
-    if (lastSpace == query.length() - 1) {
+
+    final String lastWord = getLastWord(query);
+    if (lastWord == null) {
       // Starting a new word - don't show suggestions yet.
       done.onSuggestionsReady(request, null);
       return;
-    } else if (lastSpace == -1) {
-      lastWord = query;
-    } else {
-      lastWord = query.substring(lastSpace + 1);
     }
 
     final ArrayList<SearchSuggestion> r = new ArrayList<SearchSuggestOracle.SearchSuggestion>();
@@ -118,6 +113,22 @@ public class SearchSuggestOracle extends HighlightSuggestOracle {
     done.onSuggestionsReady(request, new Response(r));
   }
 
+  private String getLastWord(final String query) {
+    final int lastSpace = query.lastIndexOf(' ');
+    if (lastSpace == query.length() - 1) {
+      return null;
+    }
+    if (lastSpace == -1) {
+      return query;
+    }
+    return query.substring(lastSpace + 1);
+  }
+
+  @Override
+  protected String getQueryPattern(final String query) {
+    return super.getQueryPattern(getLastWord(query));
+  }
+
   private static class SearchSuggestion implements SuggestOracle.Suggestion {
     private final String suggestion;
     private final String fullQuery;