cswriter: improve colorization of source code ctx

Author: kdudka

abstract-writer.cc

@@ -109,9 +109,11 @@ AbstractWriter* createWriter(
 
 struct CtxEventDetector::Private {
     boost::regex reAnyCtxLine;
+    boost::regex reKeyCtxLine;
 
     Private():
-        reAnyCtxLine("^ *[0-9]+\\|(?:->)? .*$")
+        reAnyCtxLine("^ *[0-9]+\\|(?:->)? .*$"),
+        reKeyCtxLine("^ *[0-9]+\\|-> .*$")
     {
     }
 };
@@ -129,3 +131,8 @@ bool CtxEventDetector::isAnyCtxLine(const DefEvent &evt) const {
     return (evt.event == "#")
         && boost::regex_match(evt.msg, d->reAnyCtxLine);
 }
+
+bool CtxEventDetector::isKeyCtxLine(const DefEvent &evt) const {
+    return (evt.event == "#")
+        && boost::regex_match(evt.msg, d->reKeyCtxLine);
+}

abstract-writer.hh

@@ -78,6 +78,7 @@ class CtxEventDetector {
         ~CtxEventDetector();
 
         bool isAnyCtxLine(const DefEvent &evt) const;
+        bool isKeyCtxLine(const DefEvent &evt) const;
 
     private:
         struct Private;

cswriter.cc

@@ -74,9 +74,17 @@ void CovWriter::handleDef(const Defect &def) {
         if (0 < evt.column)
             str << evt.column << ":";
 
-        if (evt.event == "#")
+        if (evt.event == "#") {
             str << d->cw.setColor(C_LIGHT_CYAN) << "#";
 
+            static CtxEventDetector detector;
+            if (detector.isAnyCtxLine(evt)) {
+                const EColor color = detector.isKeyCtxLine(evt)
+                    ? C_WHITE
+                    : C_DARK_GRAY;
+                str << d->cw.setColor(color);
+            }
+        }
         else {
             str << " ";
             if (!evt.event.empty())