quit giving out the debugger from the generator

it's leaky abstraction and makes porting to qml a bit more annoying

src/backtracegenerator.cpp

@@ -202,3 +202,13 @@ void BacktraceGenerator::setBackendPrepared()
 
     m_proc->start();
 }
+
+bool BacktraceGenerator::debuggerIsGDB() const
+{
+    return m_debugger.codeName() == QLatin1String("gdb");
+}
+
+QString BacktraceGenerator::debuggerName() const
+{
+    return m_debugger.displayName();
+}

src/backtracegenerator.h

@@ -49,14 +49,12 @@ public:
         return m_parsedBacktrace;
     }
 
-    const Debugger debugger() const
-    {
-        return m_debugger;
-    }
-
     // Called by manager when it is ready for us.
     void setBackendPrepared();
 
+    Q_INVOKABLE bool debuggerIsGDB() const;
+    Q_INVOKABLE QString debuggerName() const;
+
 public Q_SLOTS:
     void start();
 

src/backtracewidget.cpp

@@ -221,7 +221,7 @@ void BacktraceWidget::loadData()
         }
 
         // highlight if possible
-        if (m_btGenerator->debugger().codeName() == QLatin1String("gdb")) {
+        if (m_btGenerator->debuggerIsGDB()) {
             KSyntaxHighlighting::Repository repository;
             m_highlighter = new KSyntaxHighlighting::SyntaxHighlighter(ui.m_backtraceEdit->document());
             m_highlighter->setTheme((palette().color(QPalette::Base).lightness() < 128) ? repository.defaultTheme(KSyntaxHighlighting::Repository::DarkTheme)
@@ -322,7 +322,7 @@ void BacktraceWidget::loadData()
                                                "<strong>You need to first install the debugger "
                                                "application (%1) then click the <interface>Reload"
                                                "</interface> button.</strong>",
-                                               m_btGenerator->debugger().displayName()));
+                                               m_btGenerator->debuggerName()));
     }
 
     ui.m_reloadBacktraceButton->setEnabled(true);