Add an is<PropertyName>Immutable to know if a property is immutable

Summary:
Add a utility function is<Parameter>Immutable to access immutability quickly.
Generated classes uses them internally to avoid code redundance.

Sample:
```
    /**
      Set blocked-by-default
    */
    void setBlockedByDefault( bool v )
    {
      if (v != mBlockedByDefault && !isBlockedByDefaultImmutable() )  {
        mBlockedByDefault = v;
        Q_EMIT blockedByDefaultChanged();
      }
    }

    /**
      Is blocked-by-default Immutable
    */
    bool isBlockedByDefaultImmutable()
    {
      return isImmutable( QStringLiteral( "blockedByDefault" ) );
    }
```

```
    /**
      Set org.kde.ActivityManager.ResourceScoringEnabled
    */
    void setResourceScoringEnabled( bool v )
    {
      if (!isResourceScoringEnabledImmutable() )
        mResourceScoringEnabled = v;
    }

    /**
      Is org.kde.ActivityManager.ResourceScoringEnabled Immutable
    */
    bool isResourceScoringEnabledImmutable()
    {
      return isImmutable( QStringLiteral( "resourceScoringEnabled" ) );
    }
```

Reviewers: ervin, #frameworks, dfaure

Reviewed By: ervin

Subscribers: dfaure, tcanabrava, kde-frameworks-devel

Tags: #frameworks

Differential Revision: https://phabricator.kde.org/D26368

1 files changed, 20 insertions, 2 deletions

diff --git a/autotests/kconfig_compiler/test8c.h.ref b/autotests/kconfig_compiler/test8c.h.ref
index 57469dca..7e96da0b 100644
--- a/autotests/kconfig_compiler/test8c.h.ref
+++ b/autotests/kconfig_compiler/test8c.h.ref
@@ -22,7 +22,7 @@ class Test8c : public KConfigSkeleton
     static
     void setFont( const QFont & v )
     {
-      if (!self()->isImmutable( QStringLiteral( "Font" ) ))
+      if (!self()->isFontImmutable())
         self()->mFont = v;
     }
 
@@ -36,12 +36,21 @@ class Test8c : public KConfigSkeleton
     }
 
     /**
+      Is Font Immutable
+    */
+    static
+    bool isFontImmutable()
+    {
+      return self()->isImmutable( QStringLiteral( "Font" ) );
+    }
+
+    /**
       Set TitleFont
     */
     static
     void setTitleFont( const QFont & v )
     {
-      if (!self()->isImmutable( QStringLiteral( "TitleFont" ) ))
+      if (!self()->isTitleFontImmutable())
         self()->mTitleFont = v;
     }
 
@@ -54,6 +63,15 @@ class Test8c : public KConfigSkeleton
       return self()->mTitleFont;
     }
 
+    /**
+      Is TitleFont Immutable
+    */
+    static
+    bool isTitleFontImmutable()
+    {
+      return self()->isImmutable( QStringLiteral( "TitleFont" ) );
+    }
+
   protected:
     Test8c(KSharedConfig::Ptr config, QObject *parent = nullptr);
     friend class Test8cHelper;