[browser] Avoid always opening every file using gdal to test for

update capabilities

This is no longer required - it was previously done in order to
detect if the item should expose the SetCrs capability, but
that's deprecated and unused.

Fixes #16807, fixes #20411, and avoids QGIS opening every file encountered in
the browser even when the Data Source setting is set to the
default (fast) "Check Extension" setting only.

Author: nyalldawson

src/providers/gdal/qgsgdaldataitems.cpp

@@ -48,14 +48,6 @@ QgsGdalLayerItem::QgsGdalLayerItem( QgsDataItem *parent,
   }
   else
     setState( Populated );
-
-  GDALAllRegister();
-  gdal::dataset_unique_ptr hDS( GDALOpen( mPath.toUtf8().constData(), GA_Update ) );
-
-  if ( hDS )
-  {
-    mCapabilities |= SetCrs;
-  }
 }
 
 

src/providers/ogr/qgsogrdataitems.cpp

@@ -53,30 +53,11 @@ QgsOgrLayerItem::QgsOgrLayerItem( QgsDataItem *parent,
   mIsSubLayer = isSubLayer;
   mToolTip = uri;
   setState( Populated ); // children are not expected
-
-  if ( mPath.endsWith( QLatin1String( ".shp" ), Qt::CaseInsensitive ) )
-  {
-    if ( OGRGetDriverCount() == 0 )
-    {
-      OGRRegisterAll();
-    }
-    gdal::dataset_unique_ptr hDataSource( GDALOpenEx( mPath.toUtf8().constData(), GDAL_OF_VECTOR | GDAL_OF_UPDATE, nullptr, nullptr, nullptr ) );
-    if ( hDataSource )
-    {
-      mCapabilities |= SetCrs;
-    }
-
-    // It it is impossible to assign a crs to an existing layer
-    // No OGR_L_SetSpatialRef : http://trac.osgeo.org/gdal/ticket/4032
-  }
 }
 
 
 bool QgsOgrLayerItem::setCrs( const QgsCoordinateReferenceSystem &crs )
 {
-  if ( !( mCapabilities & SetCrs ) )
-    return false;
-
   QString layerName = mPath.left( mPath.indexOf( QLatin1String( ".shp" ), Qt::CaseInsensitive ) );
   QString wkt = crs.toWkt();