Show full CRS WKT for custom CRS in layer properties

python/core/auto_generated/qgscoordinatereferencesystem.sip.in

@@ -648,7 +648,14 @@ Returns the descriptive name of the CRS, e.g., "WGS 84" or "GDA 94 / Vicgrid94".
 .. seealso:: :py:func:`userFriendlyIdentifier`
 %End
 
-    QString userFriendlyIdentifier( bool shortString = false ) const;
+    enum IdentifierType
+    {
+      ShortString,
+      MediumString,
+      FullString,
+    };
+
+    QString userFriendlyIdentifier( IdentifierType type = MediumString ) const;
 %Docstring
 Returns a user friendly identifier for the CRS.
 
@@ -659,8 +666,6 @@ of the CRS.
 In most cases this is the best method to use when showing a friendly identifier for the CRS to a
 user.
 
-If ``shortString`` is ``True`` than an abbreviated identifier will be returned.
-
 .. seealso:: :py:func:`description`
 
 .. versionadded:: 3.10.3

src/app/qgsappcoordinateoperationhandlers.cpp

@@ -70,8 +70,8 @@ void QgsAppMissingGridHandler::onMissingRequiredGrid( const QgsCoordinateReferen
   if ( !shouldWarnAboutPair( sourceCrs, destinationCrs ) )
     return;
 
-  const QString shortMessage = tr( "No transform available between %1 and %2" ).arg( sourceCrs.userFriendlyIdentifier( true ),
-                               destinationCrs.userFriendlyIdentifier( true ) );
+  const QString shortMessage = tr( "No transform available between %1 and %2" ).arg( sourceCrs.userFriendlyIdentifier( QgsCoordinateReferenceSystem::ShortString ),
+                               destinationCrs.userFriendlyIdentifier( QgsCoordinateReferenceSystem::ShortString ) );
 
   QString downloadMessage;
   const QString gridName = grid.shortName;
@@ -117,8 +117,8 @@ void QgsAppMissingGridHandler::onMissingPreferredGrid( const QgsCoordinateRefere
   if ( !shouldWarnAboutPair( sourceCrs, destinationCrs ) )
     return;
 
-  const QString shortMessage = tr( "Cannot use preferred transform between %1 and %2" ).arg( sourceCrs.userFriendlyIdentifier( true ),
-                               destinationCrs.userFriendlyIdentifier( true ) );
+  const QString shortMessage = tr( "Cannot use preferred transform between %1 and %2" ).arg( sourceCrs.userFriendlyIdentifier( QgsCoordinateReferenceSystem::ShortString ),
+                               destinationCrs.userFriendlyIdentifier( QgsCoordinateReferenceSystem::ShortString ) );
 
   QString gridMessage;
   QString downloadMessage;
@@ -185,7 +185,7 @@ void QgsAppMissingGridHandler::onCoordinateOperationCreationError( const QgsCoor
   if ( !shouldWarnAboutPairForCurrentProject( sourceCrs, destinationCrs ) )
     return;
 
-  const QString shortMessage = tr( "No transform available between %1 and %2" ).arg( sourceCrs.userFriendlyIdentifier( true ), destinationCrs.userFriendlyIdentifier( true ) );
+  const QString shortMessage = tr( "No transform available between %1 and %2" ).arg( sourceCrs.userFriendlyIdentifier( QgsCoordinateReferenceSystem::ShortString ), destinationCrs.userFriendlyIdentifier( QgsCoordinateReferenceSystem::ShortString ) );
   const QString longMessage = tr( "<p>No transform is available between <i>%1</i> and <i>%2</i>.</p><p style=\"color: red\">%3</p>" ).arg( sourceCrs.userFriendlyIdentifier(), destinationCrs.userFriendlyIdentifier(), error );
 
   QgsMessageBar *bar = QgisApp::instance()->messageBar();
@@ -209,8 +209,8 @@ void QgsAppMissingGridHandler::onMissingGridUsedByContextHandler( const QgsCoord
   if ( !shouldWarnAboutPairForCurrentProject( sourceCrs, destinationCrs ) )
     return;
 
-  const QString shortMessage = tr( "Cannot use project transform between %1 and %2" ).arg( sourceCrs.userFriendlyIdentifier( true ),
-                               destinationCrs.userFriendlyIdentifier( true ) );
+  const QString shortMessage = tr( "Cannot use project transform between %1 and %2" ).arg( sourceCrs.userFriendlyIdentifier( QgsCoordinateReferenceSystem::ShortString ),
+                               destinationCrs.userFriendlyIdentifier( QgsCoordinateReferenceSystem::ShortString ) );
 
   QString gridMessage;
   QString downloadMessage;

src/core/qgscoordinatereferencesystem.cpp

@@ -1283,22 +1283,25 @@ QString QgsCoordinateReferenceSystem::description() const
   }
 }
 
-QString QgsCoordinateReferenceSystem::userFriendlyIdentifier( bool shortString ) const
+QString QgsCoordinateReferenceSystem::userFriendlyIdentifier( IdentifierType type ) const
 {
   if ( !authid().isEmpty() )
   {
-    if ( !shortString && !description().isEmpty() )
+    if ( type != ShortString && !description().isEmpty() )
       return QStringLiteral( "%1 - %2" ).arg( authid(), description() );
     return authid();
   }
   else if ( !description().isEmpty() )
     return description();
-  else if ( shortString )
+  else if ( type == ShortString )
     return QObject::tr( "Unknown CRS" );
   else if ( !toWkt( WKT2_2018 ).isEmpty() )
-    return QObject::tr( "Unknown CRS: %1" ).arg( toWkt( WKT2_2018 ).left( 50 ) + QString( QChar( 0x2026 ) ) );
+    return QObject::tr( "Unknown CRS: %1" ).arg(
+             type == MediumString ? ( toWkt( WKT2_2018 ).left( 50 ) + QString( QChar( 0x2026 ) ) )
+             : toWkt( WKT2_2018 ) );
   else if ( !toProj().isEmpty() )
-    return QObject::tr( "Unknown CRS: %1" ).arg( toProj().left( 50 ) + QString( QChar( 0x2026 ) ) );
+    return QObject::tr( "Unknown CRS: %1" ).arg( type == MediumString ? ( toProj().left( 50 ) + QString( QChar( 0x2026 ) ) )
+           : toProj() );
   else
     return QString();
 }

src/core/qgscoordinatereferencesystem.h

@@ -608,6 +608,18 @@ class CORE_EXPORT QgsCoordinateReferenceSystem
      */
     QString description() const;
 
+    /**
+     * Type of identifier string to create.
+     *
+     * \since QGIS 3.10.3
+     */
+    enum IdentifierType
+    {
+      ShortString, //!< A heavily abbreviated string, for use when a compact representation is required
+      MediumString, //!< A medium-length string, recommended for general purpose use
+      FullString, //!< Full definition -- possibly a very lengthy string, e.g. with no truncation of custom WKT definitions
+    };
+
     /**
      * Returns a user friendly identifier for the CRS.
      *
@@ -618,12 +630,10 @@ class CORE_EXPORT QgsCoordinateReferenceSystem
      * In most cases this is the best method to use when showing a friendly identifier for the CRS to a
      * user.
      *
-     * If \a shortString is TRUE than an abbreviated identifier will be returned.
-     *
      * \see description()
      * \since QGIS 3.10.3
      */
-    QString userFriendlyIdentifier( bool shortString = false ) const;
+    QString userFriendlyIdentifier( IdentifierType type = MediumString ) const;
 
     /**
      * Returns the projection acronym for the projection used by the CRS.

src/core/qgsvectorlayer.cpp

@@ -4900,7 +4900,7 @@ QString QgsVectorLayer::htmlMetadata() const
     myMetadata += QStringLiteral( "<tr><td class=\"highlight\">" ) + tr( "CRS" ) + QStringLiteral( "</td><td>" );
     if ( crs().isValid() )
     {
-      myMetadata += crs().userFriendlyIdentifier() + QStringLiteral( " - " );
+      myMetadata += crs().userFriendlyIdentifier( QgsCoordinateReferenceSystem::FullString ) + QStringLiteral( " - " );
       if ( crs().isGeographic() )
         myMetadata += tr( "Geographic" );
       else

src/core/raster/qgsrasterlayer.cpp

@@ -323,7 +323,7 @@ QString QgsRasterLayer::htmlMetadata() const
   myMetadata += QStringLiteral( "<tr><td class=\"highlight\">" ) % tr( "CRS" ) + QStringLiteral( "</td><td>" );
   if ( crs().isValid() )
   {
-    myMetadata += crs().userFriendlyIdentifier() % QStringLiteral( " - " );
+    myMetadata += crs().userFriendlyIdentifier( QgsCoordinateReferenceSystem::FullString ) % QStringLiteral( " - " );
     if ( crs().isGeographic() )
       myMetadata += tr( "Geographic" );
     else

tests/src/core/testqgscoordinatereferencesystem.cpp

@@ -1553,16 +1553,17 @@ void TestQgsCoordinateReferenceSystem::displayIdentifier()
   crs = QgsCoordinateReferenceSystem( QStringLiteral( "EPSG:3111" ) );
   QCOMPARE( crs.userFriendlyIdentifier(), QStringLiteral( "EPSG:3111 - GDA94 / Vicgrid" ) );
   crs = QgsCoordinateReferenceSystem( QStringLiteral( "EPSG:4326" ) );
-  QCOMPARE( crs.userFriendlyIdentifier( true ), QStringLiteral( "EPSG:4326" ) );
+  QCOMPARE( crs.userFriendlyIdentifier( QgsCoordinateReferenceSystem::ShortString ), QStringLiteral( "EPSG:4326" ) );
 
   // non registered custom CRS
   crs = QgsCoordinateReferenceSystem::fromProj( QStringLiteral( "+proj=sterea +lat_0=47.9860018439082 +lon_0=19.0491441390302 +k=1 +x_0=500000 +y_0=500000 +ellps=bessel +towgs84=595.75,121.09,515.50,8.2270,-1.5193,5.5971,-2.6729 +units=m +vunits=m +no_defs" ) );
 #if PROJ_VERSION_MAJOR>=6
   QCOMPARE( crs.userFriendlyIdentifier(), QStringLiteral( "Unknown CRS: BOUNDCRS[SOURCECRS[COMPOUNDCRS[\"unknown\",PROJCRS[\"%1" ).arg( QString( QChar( 0x2026 ) ) ) );  //#spellok
+  QCOMPARE( crs.userFriendlyIdentifier( QgsCoordinateReferenceSystem::FullString ), QStringLiteral( R"""(Unknown CRS: BOUNDCRS[SOURCECRS[COMPOUNDCRS["unknown",PROJCRS["unknown",BASEGEOGCRS["unknown",DATUM["Unknown based on Bessel 1841 ellipsoid",ELLIPSOID["Bessel 1841",6377397.155,299.1528128,LENGTHUNIT["metre",1,ID["EPSG",9001]]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8901]]],CONVERSION["unknown",METHOD["Oblique Stereographic",ID["EPSG",9809]],PARAMETER["Latitude of natural origin",47.9860018439082,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",19.0491441390302,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["Scale factor at natural origin",1,SCALEUNIT["unity",1],ID["EPSG",8805]],PARAMETER["False easting",500000,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",500000,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]],VERTCRS["unknown",VDATUM["unknown"],CS[vertical,1],AXIS["gravity-related height (H)",up,LENGTHUNIT["metre",1,ID["EPSG",9001]]]]]],TARGETCRS[GEOGCRS["WGS 84",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],CS[ellipsoidal,2],AXIS["latitude",north,ORDER[1],ANGLEUNIT["degree",0.0174532925199433]],AXIS["longitude",east,ORDER[2],ANGLEUNIT["degree",0.0174532925199433]],ID["EPSG",4326]]],ABRIDGEDTRANSFORMATION["Transformation from unknown to WGS84",METHOD["Position Vector transformation (geog2D domain)",ID["EPSG",9606]],PARAMETER["X-axis translation",595.75,ID["EPSG",8605]],PARAMETER["Y-axis translation",121.09,ID["EPSG",8606]],PARAMETER["Z-axis translation",515.5,ID["EPSG",8607]],PARAMETER["X-axis rotation",8.227,ID["EPSG",8608]],PARAMETER["Y-axis rotation",-1.5193,ID["EPSG",8609]],PARAMETER["Z-axis rotation",5.5971,ID["EPSG",8610]],PARAMETER["Scale difference",0.9999973271,ID["EPSG",8611]]]])""" ) );
 #else
   QCOMPARE( crs.userFriendlyIdentifier(), QStringLiteral( "Unknown CRS: PROJCS[\"unnamed\",GEOGCS[\"Bessel 1841\",DATUM[\"unkno%1" ).arg( QString( QChar( 0x2026 ) ) ) );
 #endif
-  QCOMPARE( crs.userFriendlyIdentifier( true ), QStringLiteral( "Unknown CRS" ) );
+  QCOMPARE( crs.userFriendlyIdentifier( QgsCoordinateReferenceSystem::ShortString ), QStringLiteral( "Unknown CRS" ) );
   crs.saveAsUserCrs( QStringLiteral( "my test" ) );
 #if PROJ_VERSION_MAJOR>=6
   QCOMPARE( crs.userFriendlyIdentifier(), QStringLiteral( "USER:100011 - my test" ) );