Apply editor widget project upgrades in any case

src/core/qgsprojectfiletransform.cpp

@@ -35,7 +35,7 @@
 typedef QgsProjectVersion PFV;
 
 
-QgsProjectFileTransform::transform QgsProjectFileTransform::transformers[] =
+QgsProjectFileTransform::TransformItem QgsProjectFileTransform::sTransformers[] =
 {
   {PFV( 0, 8, 0 ), PFV( 0, 8, 1 ), &QgsProjectFileTransform::transformNull},
   {PFV( 0, 8, 1 ), PFV( 0, 9, 0 ), &QgsProjectFileTransform::transform081to090},
@@ -60,7 +60,10 @@ QgsProjectFileTransform::transform QgsProjectFileTransform::transformers[] =
   {PFV( 2, 0, 0 ), PFV( 2, 1, 0 ), &QgsProjectFileTransform::transformNull},
   {PFV( 2, 1, 0 ), PFV( 2, 2, 0 ), &QgsProjectFileTransform::transformNull},
   {PFV( 2, 2, 0 ), PFV( 2, 3, 0 ), &QgsProjectFileTransform::transform2200to2300},
-  {PFV( 2, 18, 0 ), PFV( 2, 99, 0 ), &QgsProjectFileTransform::transform2180to2990},
+  // A transformer with a NULL from version means that it should be run when upgrading
+  // from any version and will take care that it's not going to cause trouble if it's
+  // run several times on the same file.
+  {PFV(), PFV( 2, 99, 0 ), &QgsProjectFileTransform::transform2990},
 };
 
 bool QgsProjectFileTransform::updateRevision( const QgsProjectVersion& newVersion )
@@ -68,15 +71,16 @@ bool QgsProjectFileTransform::updateRevision( const QgsProjectVersion& newVersio
   Q_UNUSED( newVersion );
   bool returnValue = false;
 
-  if ( ! mDom.isNull() )
+  if ( !mDom.isNull() )
   {
-    for ( std::size_t i = 0; i < sizeof( transformers ) / sizeof( transform ); i++ )
+    for ( std::size_t i = 0; i < sizeof( sTransformers ) / sizeof( TransformItem ); i++ )
     {
-      if ( transformers[i].from == mCurrentVersion )
+      const TransformItem& transformer = sTransformers[i];
+      if ( transformer.from == mCurrentVersion || transformer.from.isNull() )
       {
         // Run the transformer, and update the revision in every case
-        ( this->*( transformers[i].transformFunc ) )();
-        mCurrentVersion = transformers[i].to;
+        ( this->*( transformer.transformFunc ) )();
+        mCurrentVersion = transformer.to;
         returnValue = true;
       }
     }
@@ -614,7 +618,7 @@ void QgsProjectFileTransform::transform2200to2300()
   }
 }
 
-void QgsProjectFileTransform::transform2180to2990()
+void QgsProjectFileTransform::transform2990()
 {
   QDomNodeList mapLayers = mDom.elementsByTagName( QStringLiteral( "maplayer" ) );
 

src/core/qgsprojectfiletransform.h

@@ -28,7 +28,6 @@
 
 #include <QString>
 #include <QDomDocument>
-#include <vector>
 #include "qgsprojectversion.h"
 
 class QgsRasterLayer;
@@ -69,9 +68,9 @@ class CORE_EXPORT QgsProjectFileTransform
       QgsProjectVersion from;
       QgsProjectVersion to;
       void ( QgsProjectFileTransform::* transformFunc )();
-    } transform;
+    } TransformItem;
 
-    static transform transformers[];
+    static TransformItem sTransformers[];
 
     QDomDocument mDom;
     QgsProjectVersion mCurrentVersion;
@@ -88,7 +87,7 @@ class CORE_EXPORT QgsProjectFileTransform
     void transform1400to1500();
     void transform1800to1900();
     void transform2200to2300();
-    void transform2180to2990();
+    void transform2990();
 
     //helper functions
     static int rasterBandNumber( const QDomElement &rasterPropertiesElem, const QString &bandName, QgsRasterLayer *rlayer );

src/core/qgsprojectversion.cpp

@@ -100,3 +100,8 @@ QString QgsProjectVersion::text()
     return QStringLiteral( "%1.%2.%3-%4" ).arg( mMajor ).arg( mMinor ).arg( mSub ).arg( mName );
   }
 }
+
+bool QgsProjectVersion::isNull() const
+{
+  return mMajor == 0 && mMinor == 0 && mSub == 0;
+}

src/core/qgsprojectversion.h

@@ -32,6 +32,9 @@ class CORE_EXPORT QgsProjectVersion
 
   public:
 
+    /**
+     * Creates a new NULL version
+     */
     QgsProjectVersion()
         : mMajor( 0 )
         , mMinor( 0 )
@@ -45,6 +48,11 @@ class CORE_EXPORT QgsProjectVersion
     int subVersion()   { return mSub;}
     QString text();
 
+    /**
+     * Returns true if this is a NULL project version.
+     */
+    bool isNull() const;
+
     /** Boolean equal operator
      */
     bool operator==( const QgsProjectVersion &other ) const;