[processing] Allow CRS parameters to be set to a direct QgsCoordinateReferenceSystem object

Author: nyalldawson

src/core/processing/qgsprocessingparameters.cpp

@@ -687,7 +687,12 @@ QgsCoordinateReferenceSystem QgsProcessingParameters::parameterAsCrs( const QgsP
 
   QVariant val = value;
 
-  if ( val.canConvert<QgsProcessingFeatureSourceDefinition>() )
+  if ( val.canConvert<QgsCoordinateReferenceSystem>() )
+  {
+    // input is a QgsCoordinateReferenceSystem - done!
+    return val.value< QgsCoordinateReferenceSystem >();
+  }
+  else if ( val.canConvert<QgsProcessingFeatureSourceDefinition>() )
   {
     // input is a QgsProcessingFeatureSourceDefinition - get extra properties from it
     QgsProcessingFeatureSourceDefinition fromVar = qvariant_cast<QgsProcessingFeatureSourceDefinition>( val );
@@ -1717,7 +1722,11 @@ bool QgsProcessingParameterCrs::checkValueIsAcceptable( const QVariant &input, Q
   if ( !input.isValid() )
     return mFlags & FlagOptional;
 
-  if ( input.canConvert<QgsProcessingFeatureSourceDefinition>() )
+  if ( input.canConvert<QgsCoordinateReferenceSystem>() )
+  {
+    return true;
+  }
+  else if ( input.canConvert<QgsProcessingFeatureSourceDefinition>() )
   {
     return true;
   }
@@ -1746,6 +1755,14 @@ QString QgsProcessingParameterCrs::valueAsPythonString( const QVariant &value, Q
   if ( !value.isValid() )
     return QStringLiteral( "None" );
 
+  if ( value.canConvert<QgsCoordinateReferenceSystem>() )
+  {
+    if ( !value.value< QgsCoordinateReferenceSystem >().isValid() )
+      return QStringLiteral( "QgsCoordinateReferenceSystem()" );
+    else
+      return QStringLiteral( "QgsCoordinateReferenceSystem('%1')" ).arg( value.value< QgsCoordinateReferenceSystem >().authid() );
+  }
+
   if ( value.canConvert<QgsProperty>() )
     return QStringLiteral( "QgsProperty.fromExpression('%1')" ).arg( value.value< QgsProperty >().asExpression() );
 

src/core/processing/qgsprocessingparametertypeimpl.h

@@ -257,6 +257,7 @@ class CORE_EXPORT QgsProcessingParameterTypeCrs : public QgsProcessingParameterT
              << QObject::tr( "str: layer ID. CRS of layer is used." )
              << QObject::tr( "str: layer name. CRS of layer is used." )
              << QObject::tr( "str: layer source. CRS of layer is used." )
+             << QObject::tr( "QgsCoordinateReferenceSystem" )
              << QObject::tr( "QgsMapLayer: CRS of layer is used" )
              << QObject::tr( "QgsProcessingFeatureSourceDefinition: CRS of source is used" )
              << QStringLiteral( "QgsProperty" );

tests/src/analysis/testqgsprocessing.cpp

@@ -2125,6 +2125,8 @@ void TestQgsProcessing::parameterCrs()
   QVERIFY( def->checkValueIsAcceptable( "EPSG:12003" ) );
   QVERIFY( def->checkValueIsAcceptable( "EPSG:3111" ) );
   QVERIFY( def->checkValueIsAcceptable( QVariant::fromValue( r1 ) ) );
+  QVERIFY( def->checkValueIsAcceptable( QgsCoordinateReferenceSystem() ) );
+  QVERIFY( def->checkValueIsAcceptable( QgsCoordinateReferenceSystem( QStringLiteral( "EPSG:3111" ) ) ) );
   QVERIFY( !def->checkValueIsAcceptable( "" ) );
   QVERIFY( !def->checkValueIsAcceptable( QVariant() ) );
   QVERIFY( def->checkValueIsAcceptable( QgsProcessingFeatureSourceDefinition( r1->id() ) ) );
@@ -2139,6 +2141,12 @@ void TestQgsProcessing::parameterCrs()
   params.insert( "non_optional",  QVariant::fromValue( v1 ) );
   QCOMPARE( QgsProcessingParameters::parameterAsCrs( def.get(), params, context ).authid(), QString( "EPSG:3111" ) );
 
+  // using QgsCoordinateReferenceSystem
+  params.insert( "non_optional",  QgsCoordinateReferenceSystem( "EPSG:28356" ) );
+  QCOMPARE( QgsProcessingParameters::parameterAsCrs( def.get(), params, context ).authid(), QString( "EPSG:28356" ) );
+  params.insert( "non_optional",  QgsCoordinateReferenceSystem() );
+  QVERIFY( !QgsProcessingParameters::parameterAsCrs( def.get(), params, context ).isValid() );
+
   // special ProjectCrs string
   params.insert( "non_optional",  QStringLiteral( "ProjectCrs" ) );
   QCOMPARE( QgsProcessingParameters::parameterAsCrs( def.get(), params, context ).authid(), QString( "EPSG:28353" ) );
@@ -2172,6 +2180,8 @@ void TestQgsProcessing::parameterCrs()
   QCOMPARE( QgsProcessingParameters::parameterAsCrs( def.get(), params, context ).authid(), QString( "EPSG:3111" ) );
 
   QCOMPARE( def->valueAsPythonString( QVariant(), context ), QStringLiteral( "None" ) );
+  QCOMPARE( def->valueAsPythonString( QgsCoordinateReferenceSystem( "EPSG:3111" ), context ), QStringLiteral( "QgsCoordinateReferenceSystem('EPSG:3111')" ) );
+  QCOMPARE( def->valueAsPythonString( QgsCoordinateReferenceSystem(), context ), QStringLiteral( "QgsCoordinateReferenceSystem()" ) );
   QCOMPARE( def->valueAsPythonString( "EPSG:12003", context ), QStringLiteral( "'EPSG:12003'" ) );
   QCOMPARE( def->valueAsPythonString( "ProjectCrs", context ), QStringLiteral( "'ProjectCrs'" ) );
   QCOMPARE( def->valueAsPythonString( QStringLiteral( "c:\\test\\new data\\test.dat" ), context ), QStringLiteral( "'c:\\\\test\\\\new data\\\\test.dat'" ) );