Mark unused symbols.

src/plugins/cppeditor/cppeditor.cpp

@@ -949,16 +949,22 @@ void CPPEditor::updateMethodBoxIndex()
 
 static void highlightUses(QTextDocument *doc,
                           const QTextCharFormat &format,
+                          const QTextCharFormat &unusedFormat,
                           const QList<SemanticInfo::Use> &uses,
                           QList<QTextEdit::ExtraSelection> *selections)
 {
-    if (uses.size() <= 1)
-        return;
+    bool isUnused = false;
+    if (uses.size() == 1)
+        isUnused = true;
 
     foreach (const SemanticInfo::Use &use, uses) {
         QTextEdit::ExtraSelection sel;
 
+        if (isUnused)
+            sel.format = unusedFormat;
+        else
             sel.format = format;
+
         sel.cursor = QTextCursor(doc);
 
         const int anchor = doc->findBlockByNumber(use.line - 1).position() + use.column - 1;
@@ -1708,6 +1714,7 @@ void CPPEditor::setFontSettings(const TextEditor::FontSettings &fs)
     highlighter->rehighlight();
 
     m_occurrencesFormat = fs.toTextCharFormat(QLatin1String(TextEditor::Constants::C_OCCURRENCES));
+    m_occurrencesUnusedFormat = fs.toTextCharFormat(QLatin1String(TextEditor::Constants::C_OCCURRENCES_UNUSED));
     m_occurrenceRenameFormat = fs.toTextCharFormat(QLatin1String(TextEditor::Constants::C_OCCURRENCES_RENAME));
 }
 
@@ -1786,11 +1793,9 @@ void CPPEditor::updateSemanticInfo(const SemanticInfo &semanticInfo)
             }
         }
 
-        if (! good)
-            continue;
-
-        highlightUses(document(), m_occurrencesFormat, uses, &selections);
-        break; // done
+        if (uses.size() == 1 || good)
+            highlightUses(document(), m_occurrencesFormat, m_occurrencesUnusedFormat,
+                          uses, &selections);
     }
 
     setExtraSelections(CodeSemanticsSelection, selections);

src/plugins/cppeditor/cppeditor.h

@@ -281,6 +281,7 @@ private:
     QTimer *m_updateMethodBoxTimer;
     QTimer *m_updateUsesTimer;
     QTextCharFormat m_occurrencesFormat;
+    QTextCharFormat m_occurrencesUnusedFormat;
     QTextCharFormat m_occurrenceRenameFormat;
 
     QList<QTextEdit::ExtraSelection> m_renameSelections;

src/plugins/texteditor/fontsettingspage.cpp

@@ -251,6 +251,8 @@ QColor FormatDescription::foreground() const
         } else {
             return m_format.foreground();
         }
+    } else if (m_name == QLatin1String(Constants::C_OCCURRENCES_UNUSED)) {
+        return Qt::lightGray;
     } else if (m_name == QLatin1String(Constants::C_PARENTHESES)) {
         return QColor(Qt::red);
     }

src/plugins/texteditor/texteditorconstants.h

@@ -80,6 +80,7 @@ const char * const C_PARENTHESES         = "Parentheses";
 const char * const C_CURRENT_LINE        = "CurrentLine";
 const char * const C_CURRENT_LINE_NUMBER = "CurrentLineNumber";
 const char * const C_OCCURRENCES         = "Occurrences";
+const char * const C_OCCURRENCES_UNUSED  = "Occurrences.Unused";
 const char * const C_OCCURRENCES_RENAME  = "Occurrences.Rename";
 
 const char * const C_NUMBER              = "Number";

src/plugins/texteditor/texteditorsettings.cpp

@@ -78,6 +78,7 @@ TextEditorSettings::TextEditorSettings(QObject *parent)
     formatDescriptions.append(currentLineNumber);
 
     formatDescriptions.append(FormatDescription(QLatin1String(C_OCCURRENCES), tr("Occurrences")));
+    formatDescriptions.append(FormatDescription(QLatin1String(C_OCCURRENCES_UNUSED), tr("Unused Occurrence")));
     formatDescriptions.append(FormatDescription(QLatin1String(C_OCCURRENCES_RENAME), tr("Renaming Occurrence")));
 
     // Standard categories