add special case in annotator for SimpleMatcher.does_nothing

common/python/nomadcore/annotator.py

@@ -42,20 +42,43 @@ class Annotator(object):
             return 1
         # classify match
         full = match and match.start() == 0 and match.end() == len(line)
-        ignore = not match and (RE_EMPTY.match(line) or (
-            self.coverageIgnore is not None and
-            self.coverageIgnore.match(line)))
+        ignore = False
+        matcher_does_nothing = False
+        if match:
+            if matcher.does_nothing:
+                matcher_does_nothing = True
+        else:
+            m2 = RE_EMPTY.match(line)
+            if m2:
+                ignore = True
+                match = m2
+            elif self.coverageIgnore is not None:
+                m2 = self.coverageIgnore.match(line)
+                if m2:
+                    ignore = True
+                    match = m2
 
         # setup match label
-        if match:
-            matchlabel = ('' if full else 'p_') + ('end' if targetStartEnd else 'start')
+        matchlabel = ''
+        if ignore:
+            matchlabel = 'ign'
+        elif match:
+            if matcher_does_nothing:
+                matchlabel='n_'
+            if not full:
+                matchlabel += 'p_'
+            matchlabel += 'end' if targetStartEnd else 'start'
         else:
-            matchlabel = 'ign' if ignore else 'no'
+            matchlabel = 'no'
         # highlight line
-        if match:
+        if ignore:
+            highlighted = self.matchHighlighter.highlight(
+                match, line, linecolor=ANSI.FG_BLUE)
+        elif matcher_does_nothing:
+            highlighted = self.matchHighlighter.highlight(
+                match, line, linecolor=ANSI.FG_MAGENTA)
+        elif match:
             highlighted = self.matchHighlighter.highlight(match, line)
-        elif ignore:
-            highlighted = ANSI.FG_BLUE + self.matchHighlighter.with_ANSI_RESET(line)
         else:
             highlighted = line
         # set matcher name