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qgsprocessingparameters.cpp
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qgsprocessingparameters.cpp
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/***************************************************************************
qgsprocessingparameters.cpp
---------------------------
begin : April 2017
copyright : (C) 2017 by Nyall Dawson
email : nyall dot dawson at gmail dot com
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "qgsprocessingparameters.h"
#include "qgsprocessingprovider.h"
#include "qgsprocessingcontext.h"
#include "qgsprocessingutils.h"
#include "qgsprocessingalgorithm.h"
#include "qgsvectorlayerfeatureiterator.h"
#include "qgsprocessingoutputs.h"
#include "qgssettings.h"
#include "qgsvectorfilewriter.h"
#include "qgsreferencedgeometry.h"
#include <functional>
bool QgsProcessingParameters::isDynamic( const QVariantMap ¶meters, const QString &name )
{
QVariant val = parameters.value( name );
if ( val.canConvert<QgsProperty>() )
return val.value< QgsProperty >().propertyType() != QgsProperty::StaticProperty;
else
return false;
}
QString QgsProcessingParameters::parameterAsString( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, const QgsProcessingContext &context )
{
if ( !definition )
return QString();
QVariant val = parameters.value( definition->name() );
if ( val.canConvert<QgsProperty>() )
return val.value< QgsProperty >().valueAsString( context.expressionContext(), definition->defaultValue().toString() );
if ( !val.isValid() )
{
// fall back to default
val = definition->defaultValue();
}
return val.toString();
}
QString QgsProcessingParameters::parameterAsExpression( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, const QgsProcessingContext &context )
{
if ( !definition )
return QString();
QVariant val = parameters.value( definition->name() );
if ( val.canConvert<QgsProperty>() )
return val.value< QgsProperty >().valueAsString( context.expressionContext(), definition->defaultValue().toString() );
if ( val.isValid() && !val.toString().isEmpty() )
{
QgsExpression e( val.toString() );
if ( e.isValid() )
return val.toString();
}
// fall back to default
return definition->defaultValue().toString();
}
double QgsProcessingParameters::parameterAsDouble( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, const QgsProcessingContext &context )
{
if ( !definition )
return 0;
QVariant val = parameters.value( definition->name() );
if ( val.canConvert<QgsProperty>() )
return val.value< QgsProperty >().valueAsDouble( context.expressionContext(), definition->defaultValue().toDouble() );
bool ok = false;
double res = val.toDouble( &ok );
if ( ok )
return res;
// fall back to default
val = definition->defaultValue();
return val.toDouble();
}
int QgsProcessingParameters::parameterAsInt( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, const QgsProcessingContext &context )
{
if ( !definition )
return 0;
QVariant val = parameters.value( definition->name() );
if ( val.canConvert<QgsProperty>() )
return val.value< QgsProperty >().valueAsInt( context.expressionContext(), definition->defaultValue().toInt() );
bool ok = false;
double dbl = val.toDouble( &ok );
if ( !ok )
{
// fall back to default
val = definition->defaultValue();
dbl = val.toDouble( &ok );
}
//String representations of doubles in QVariant will not convert to int
//work around this by first converting to double, and then checking whether the double is convertible to int
if ( ok )
{
double round = std::round( dbl );
if ( round > INT_MAX || round < -INT_MAX )
{
//double too large to fit in int
return 0;
}
return std::round( dbl );
}
return val.toInt();
}
int QgsProcessingParameters::parameterAsEnum( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, const QgsProcessingContext &context )
{
if ( !definition )
return 0;
int val = parameterAsInt( definition, parameters, context );
const QgsProcessingParameterEnum *enumDef = dynamic_cast< const QgsProcessingParameterEnum *>( definition );
if ( enumDef && val >= enumDef->options().size() )
{
return enumDef->defaultValue().toInt();
}
return val;
}
QList<int> QgsProcessingParameters::parameterAsEnums( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, const QgsProcessingContext &context )
{
if ( !definition )
return QList<int>();
QVariantList resultList;
QVariant val = parameters.value( definition->name() );
if ( val.canConvert<QgsProperty>() )
resultList << val.value< QgsProperty >().valueAsString( context.expressionContext(), definition->defaultValue().toString() );
else if ( val.type() == QVariant::List )
{
Q_FOREACH ( const QVariant &var, val.toList() )
resultList << var;
}
else if ( val.type() == QVariant::String )
{
Q_FOREACH ( const QString &var, val.toString().split( ',' ) )
resultList << var;
}
else
resultList << val;
if ( resultList.isEmpty() )
return QList< int >();
if ( ( !val.isValid() || !resultList.at( 0 ).isValid() ) && definition )
{
resultList.clear();
// check default
if ( definition->defaultValue().type() == QVariant::List )
{
Q_FOREACH ( const QVariant &var, definition->defaultValue().toList() )
resultList << var;
}
else if ( definition->defaultValue().type() == QVariant::String )
{
Q_FOREACH ( const QString &var, definition->defaultValue().toString().split( ',' ) )
resultList << var;
}
else
resultList << definition->defaultValue();
}
QList< int > result;
const QgsProcessingParameterEnum *enumDef = dynamic_cast< const QgsProcessingParameterEnum *>( definition );
Q_FOREACH ( const QVariant &var, resultList )
{
int resInt = var.toInt();
if ( !enumDef || resInt < enumDef->options().size() )
{
result << resInt;
}
}
return result;
}
bool QgsProcessingParameters::parameterAsBool( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, const QgsProcessingContext &context )
{
if ( !definition )
return false;
QVariant def = definition->defaultValue();
QVariant val = parameters.value( definition->name() );
if ( val.canConvert<QgsProperty>() )
return val.value< QgsProperty >().valueAsBool( context.expressionContext(), def.toBool() );
else if ( val.isValid() )
return val.toBool();
else
return def.toBool();
}
QgsFeatureSink *QgsProcessingParameters::parameterAsSink( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, const QgsFields &fields,
QgsWkbTypes::Type geometryType, const QgsCoordinateReferenceSystem &crs,
QgsProcessingContext &context, QString &destinationIdentifier )
{
QVariant val;
if ( definition )
{
val = parameters.value( definition->name() );
}
QgsProject *destinationProject = nullptr;
QString destName;
QVariantMap createOptions;
if ( val.canConvert<QgsProcessingOutputLayerDefinition>() )
{
// input is a QgsProcessingOutputLayerDefinition - get extra properties from it
QgsProcessingOutputLayerDefinition fromVar = qvariant_cast<QgsProcessingOutputLayerDefinition>( val );
destinationProject = fromVar.destinationProject;
createOptions = fromVar.createOptions;
val = fromVar.sink;
destName = fromVar.destinationName;
}
QString dest;
if ( val.canConvert<QgsProperty>() )
{
dest = val.value< QgsProperty >().valueAsString( context.expressionContext(), definition->defaultValue().toString() );
}
else if ( !val.isValid() || val.toString().isEmpty() )
{
if ( definition && definition->flags() & QgsProcessingParameterDefinition::FlagOptional && !definition->defaultValue().isValid() )
{
// unset, optional sink, no default => no sink
return nullptr;
}
// fall back to default
dest = definition->defaultValue().toString();
}
else
{
dest = val.toString();
}
if ( dest.isEmpty() )
return nullptr;
std::unique_ptr< QgsFeatureSink > sink( QgsProcessingUtils::createFeatureSink( dest, context, fields, geometryType, crs, createOptions ) );
destinationIdentifier = dest;
if ( destinationProject )
{
if ( destName.isEmpty() && definition )
{
destName = definition->description();
}
QString outputName;
if ( definition )
outputName = definition->name();
context.addLayerToLoadOnCompletion( destinationIdentifier, QgsProcessingContext::LayerDetails( destName, destinationProject, outputName ) );
}
return sink.release();
}
QgsProcessingFeatureSource *QgsProcessingParameters::parameterAsSource( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context )
{
if ( !definition )
return nullptr;
QVariant val = parameters.value( definition->name() );
return QgsProcessingUtils::variantToSource( val, context, definition->defaultValue() );
}
QString QgsProcessingParameters::parameterAsCompatibleSourceLayerPath( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context, const QStringList &compatibleFormats, const QString &preferredFormat, QgsProcessingFeedback *feedback )
{
if ( !definition )
return QString();
QVariant val = parameters.value( definition->name() );
bool selectedFeaturesOnly = false;
if ( val.canConvert<QgsProcessingFeatureSourceDefinition>() )
{
// input is a QgsProcessingFeatureSourceDefinition - get extra properties from it
QgsProcessingFeatureSourceDefinition fromVar = qvariant_cast<QgsProcessingFeatureSourceDefinition>( val );
selectedFeaturesOnly = fromVar.selectedFeaturesOnly;
val = fromVar.source;
}
QString layerRef;
if ( val.canConvert<QgsProperty>() )
{
layerRef = val.value< QgsProperty >().valueAsString( context.expressionContext(), definition->defaultValue().toString() );
}
else if ( !val.isValid() || val.toString().isEmpty() )
{
// fall back to default
layerRef = definition->defaultValue().toString();
}
else
{
layerRef = val.toString();
}
if ( layerRef.isEmpty() )
return QString();
QgsVectorLayer *vl = qobject_cast< QgsVectorLayer *>( QgsProcessingUtils::mapLayerFromString( layerRef, context ) );
if ( !vl )
return QString();
return QgsProcessingUtils::convertToCompatibleFormat( vl, selectedFeaturesOnly, definition->name(),
compatibleFormats, preferredFormat, context, feedback );
}
QgsMapLayer *QgsProcessingParameters::parameterAsLayer( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context )
{
if ( !definition )
return nullptr;
QVariant val = parameters.value( definition->name() );
if ( val.canConvert<QgsProperty>() )
{
val = val.value< QgsProperty >().valueAsString( context.expressionContext(), definition->defaultValue().toString() );
}
if ( QgsMapLayer *layer = qobject_cast< QgsMapLayer * >( qvariant_cast<QObject *>( val ) ) )
{
return layer;
}
if ( !val.isValid() || val.toString().isEmpty() )
{
// fall back to default
val = definition->defaultValue();
}
if ( QgsMapLayer *layer = qobject_cast< QgsMapLayer * >( qvariant_cast<QObject *>( val ) ) )
{
return layer;
}
QString layerRef = val.toString();
if ( layerRef.isEmpty() )
layerRef = definition->defaultValue().toString();
if ( layerRef.isEmpty() )
return nullptr;
return QgsProcessingUtils::mapLayerFromString( layerRef, context );
}
QgsRasterLayer *QgsProcessingParameters::parameterAsRasterLayer( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context )
{
return qobject_cast< QgsRasterLayer *>( parameterAsLayer( definition, parameters, context ) );
}
QString QgsProcessingParameters::parameterAsOutputLayer( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context )
{
QVariant val;
if ( definition )
{
val = parameters.value( definition->name() );
}
QgsProject *destinationProject = nullptr;
QVariantMap createOptions;
QString destName;
if ( val.canConvert<QgsProcessingOutputLayerDefinition>() )
{
// input is a QgsProcessingOutputLayerDefinition - get extra properties from it
QgsProcessingOutputLayerDefinition fromVar = qvariant_cast<QgsProcessingOutputLayerDefinition>( val );
destinationProject = fromVar.destinationProject;
createOptions = fromVar.createOptions;
val = fromVar.sink;
destName = fromVar.destinationName;
}
QString dest;
if ( val.canConvert<QgsProperty>() )
{
dest = val.value< QgsProperty >().valueAsString( context.expressionContext(), definition->defaultValue().toString() );
}
else if ( definition && ( !val.isValid() || val.toString().isEmpty() ) )
{
// fall back to default
dest = definition->defaultValue().toString();
}
else
{
dest = val.toString();
}
if ( destinationProject )
{
QString outputName;
if ( destName.isEmpty() && definition )
{
destName = definition->description();
}
if ( definition )
outputName = definition->name();
context.addLayerToLoadOnCompletion( dest, QgsProcessingContext::LayerDetails( destName, destinationProject, outputName ) );
}
return dest;
}
QString QgsProcessingParameters::parameterAsFileOutput( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context )
{
QVariant val;
if ( definition )
{
val = parameters.value( definition->name() );
}
if ( val.canConvert<QgsProcessingOutputLayerDefinition>() )
{
// input is a QgsProcessingOutputLayerDefinition - get extra properties from it
QgsProcessingOutputLayerDefinition fromVar = qvariant_cast<QgsProcessingOutputLayerDefinition>( val );
val = fromVar.sink;
}
QString dest;
if ( val.canConvert<QgsProperty>() )
{
dest = val.value< QgsProperty >().valueAsString( context.expressionContext(), definition->defaultValue().toString() );
}
else if ( !val.isValid() || val.toString().isEmpty() )
{
// fall back to default
dest = definition->defaultValue().toString();
}
else
{
dest = val.toString();
}
return dest;
}
QgsVectorLayer *QgsProcessingParameters::parameterAsVectorLayer( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context )
{
return qobject_cast< QgsVectorLayer *>( parameterAsLayer( definition, parameters, context ) );
}
QgsCoordinateReferenceSystem QgsProcessingParameters::parameterAsCrs( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context )
{
if ( !definition )
return QgsCoordinateReferenceSystem();
QVariant val = parameters.value( definition->name() );
QString crsText = parameterAsString( definition, parameters, context );
if ( crsText.isEmpty() )
crsText = definition->defaultValue().toString();
if ( crsText.isEmpty() )
return QgsCoordinateReferenceSystem();
// maybe special string
if ( context.project() && crsText.compare( QStringLiteral( "ProjectCrs" ), Qt::CaseInsensitive ) == 0 )
return context.project()->crs();
// maybe a map layer reference
if ( QgsMapLayer *layer = qobject_cast< QgsMapLayer * >( qvariant_cast<QObject *>( val ) ) )
return layer->crs();
else if ( QgsMapLayer *layer = QgsProcessingUtils::mapLayerFromString( crsText, context ) )
return layer->crs();
// else CRS from string
QgsCoordinateReferenceSystem crs;
crs.createFromString( crsText );
return crs;
}
QgsRectangle QgsProcessingParameters::parameterAsExtent( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context,
const QgsCoordinateReferenceSystem &crs )
{
if ( !definition )
return QgsRectangle();
QVariant val = parameters.value( definition->name() );
if ( val.canConvert< QgsRectangle >() )
{
return val.value<QgsRectangle>();
}
if ( val.canConvert< QgsReferencedRectangle >() )
{
QgsReferencedRectangle rr = val.value<QgsReferencedRectangle>();
if ( crs.isValid() && rr.crs().isValid() && crs != rr.crs() )
{
QgsCoordinateTransform ct( rr.crs(), crs, context.project() );
try
{
return ct.transformBoundingBox( rr );
}
catch ( QgsCsException & )
{
QgsMessageLog::logMessage( QObject::tr( "Error transforming extent geometry" ) );
}
}
return rr;
}
// maybe parameter is a direct layer value?
QgsMapLayer *layer = qobject_cast< QgsMapLayer * >( qvariant_cast<QObject *>( val ) );
QString rectText;
if ( val.canConvert<QgsProperty>() )
rectText = val.value< QgsProperty >().valueAsString( context.expressionContext(), definition->defaultValue().toString() );
else
rectText = val.toString();
if ( rectText.isEmpty() && !layer )
return QgsRectangle();
QRegularExpression rx( "^(.*?)\\s*,\\s*(.*?),\\s*(.*?),\\s*(.*?)\\s*(?:\\[(.*)\\])?\\s*$" );
QRegularExpressionMatch match = rx.match( rectText );
if ( match.hasMatch() )
{
bool xMinOk = false;
double xMin = match.captured( 1 ).toDouble( &xMinOk );
bool xMaxOk = false;
double xMax = match.captured( 2 ).toDouble( &xMaxOk );
bool yMinOk = false;
double yMin = match.captured( 3 ).toDouble( &yMinOk );
bool yMaxOk = false;
double yMax = match.captured( 4 ).toDouble( &yMaxOk );
if ( xMinOk && xMaxOk && yMinOk && yMaxOk )
{
QgsRectangle rect( xMin, yMin, xMax, yMax );
QgsCoordinateReferenceSystem rectCrs( match.captured( 5 ) );
if ( crs.isValid() && rectCrs.isValid() && crs != rectCrs )
{
QgsCoordinateTransform ct( rectCrs, crs, context.project() );
try
{
return ct.transformBoundingBox( rect );
}
catch ( QgsCsException & )
{
QgsMessageLog::logMessage( QObject::tr( "Error transforming extent geometry" ) );
}
}
return rect;
}
}
// try as layer extent
if ( !layer )
layer = QgsProcessingUtils::mapLayerFromString( rectText, context );
if ( layer )
{
QgsRectangle rect = layer->extent();
if ( crs.isValid() && layer->crs().isValid() && crs != layer->crs() )
{
QgsCoordinateTransform ct( layer->crs(), crs, context.project() );
try
{
return ct.transformBoundingBox( rect );
}
catch ( QgsCsException & )
{
QgsMessageLog::logMessage( QObject::tr( "Error transforming extent geometry" ) );
}
}
return rect;
}
return QgsRectangle();
}
QgsGeometry QgsProcessingParameters::parameterAsExtentGeometry( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context, const QgsCoordinateReferenceSystem &crs )
{
if ( !definition )
return QgsGeometry();
QVariant val = parameters.value( definition->name() );
if ( val.canConvert< QgsReferencedRectangle >() )
{
QgsReferencedRectangle rr = val.value<QgsReferencedRectangle>();
QgsGeometry g = QgsGeometry::fromRect( rr );
if ( crs.isValid() && rr.crs().isValid() && crs != rr.crs() )
{
g = g.densifyByCount( 20 );
QgsCoordinateTransform ct( rr.crs(), crs, context.project() );
try
{
g.transform( ct );
}
catch ( QgsCsException & )
{
QgsMessageLog::logMessage( QObject::tr( "Error transforming extent geometry" ) );
}
return g;
}
}
QString rectText;
if ( val.canConvert<QgsProperty>() )
rectText = val.value< QgsProperty >().valueAsString( context.expressionContext(), definition->defaultValue().toString() );
else
rectText = val.toString();
if ( !rectText.isEmpty() )
{
QRegularExpression rx( "^(.*?)\\s*,\\s*(.*?),\\s*(.*?),\\s*(.*?)\\s*(?:\\[(.*)\\])?\\s*$" );
QRegularExpressionMatch match = rx.match( rectText );
if ( match.hasMatch() )
{
bool xMinOk = false;
double xMin = match.captured( 1 ).toDouble( &xMinOk );
bool xMaxOk = false;
double xMax = match.captured( 2 ).toDouble( &xMaxOk );
bool yMinOk = false;
double yMin = match.captured( 3 ).toDouble( &yMinOk );
bool yMaxOk = false;
double yMax = match.captured( 4 ).toDouble( &yMaxOk );
if ( xMinOk && xMaxOk && yMinOk && yMaxOk )
{
QgsRectangle rect( xMin, yMin, xMax, yMax );
QgsCoordinateReferenceSystem rectCrs( match.captured( 5 ) );
QgsGeometry g = QgsGeometry::fromRect( rect );
if ( crs.isValid() && rectCrs.isValid() && crs != rectCrs )
{
g = g.densifyByCount( 20 );
QgsCoordinateTransform ct( rectCrs, crs, context.project() );
try
{
g.transform( ct );
}
catch ( QgsCsException & )
{
QgsMessageLog::logMessage( QObject::tr( "Error transforming extent geometry" ) );
}
return g;
}
}
}
}
// try as layer extent
// maybe parameter is a direct layer value?
QgsMapLayer *layer = qobject_cast< QgsMapLayer * >( qvariant_cast<QObject *>( val ) );
if ( !layer )
layer = QgsProcessingUtils::mapLayerFromString( rectText, context );
if ( layer )
{
QgsRectangle rect = layer->extent();
QgsGeometry g = QgsGeometry::fromRect( rect );
if ( crs.isValid() && layer->crs().isValid() && crs != layer->crs() )
{
g = g.densifyByCount( 20 );
QgsCoordinateTransform ct( layer->crs(), crs, context.project() );
try
{
g.transform( ct );
}
catch ( QgsCsException & )
{
QgsMessageLog::logMessage( QObject::tr( "Error transforming extent geometry" ) );
}
}
return g;
}
return QgsGeometry::fromRect( parameterAsExtent( definition, parameters, context, crs ) );
}
QgsCoordinateReferenceSystem QgsProcessingParameters::parameterAsExtentCrs( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context )
{
QVariant val = parameters.value( definition->name() );
if ( val.canConvert< QgsReferencedRectangle >() )
{
QgsReferencedRectangle rr = val.value<QgsReferencedRectangle>();
if ( rr.crs().isValid() )
{
return rr.crs();
}
}
QRegularExpression rx( "^(.*?)\\s*,\\s*(.*?),\\s*(.*?),\\s*(.*?)\\s*(?:\\[(.*)\\])?\\s*$" );
QString valueAsString = parameterAsString( definition, parameters, context );
QRegularExpressionMatch match = rx.match( valueAsString );
if ( match.hasMatch() )
{
QgsCoordinateReferenceSystem crs( match.captured( 5 ) );
if ( crs.isValid() )
return crs;
}
// try as layer crs
if ( QgsMapLayer *layer = qobject_cast< QgsMapLayer * >( qvariant_cast<QObject *>( val ) ) )
return layer->crs();
else if ( QgsMapLayer *layer = QgsProcessingUtils::mapLayerFromString( valueAsString, context ) )
return layer->crs();
if ( context.project() )
return context.project()->crs();
else
return QgsCoordinateReferenceSystem();
}
QgsPointXY QgsProcessingParameters::parameterAsPoint( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context, const QgsCoordinateReferenceSystem &crs )
{
if ( !definition )
return QgsPointXY();
QVariant val = parameters.value( definition->name() );
if ( val.canConvert< QgsPointXY >() )
{
return val.value<QgsPointXY>();
}
if ( val.canConvert< QgsReferencedPointXY >() )
{
QgsReferencedPointXY rp = val.value<QgsReferencedPointXY>();
if ( crs.isValid() && rp.crs().isValid() && crs != rp.crs() )
{
QgsCoordinateTransform ct( rp.crs(), crs, context.project() );
try
{
return ct.transform( rp );
}
catch ( QgsCsException & )
{
QgsMessageLog::logMessage( QObject::tr( "Error transforming point geometry" ) );
}
}
return rp;
}
QString pointText = parameterAsString( definition, parameters, context );
if ( pointText.isEmpty() )
pointText = definition->defaultValue().toString();
if ( pointText.isEmpty() )
return QgsPointXY();
QRegularExpression rx( "^(.*?)\\s*,\\s*(.*?)\\s*(?:\\[(.*)\\])?\\s*$" );
QString valueAsString = parameterAsString( definition, parameters, context );
QRegularExpressionMatch match = rx.match( valueAsString );
if ( match.hasMatch() )
{
bool xOk = false;
double x = match.captured( 1 ).toDouble( &xOk );
bool yOk = false;
double y = match.captured( 2 ).toDouble( &yOk );
if ( xOk && yOk )
{
QgsPointXY pt( x, y );
QgsCoordinateReferenceSystem pointCrs( match.captured( 3 ) );
if ( crs.isValid() && pointCrs.isValid() && crs != pointCrs )
{
QgsCoordinateTransform ct( pointCrs, crs, context.project() );
try
{
return ct.transform( pt );
}
catch ( QgsCsException & )
{
QgsMessageLog::logMessage( QObject::tr( "Error transforming point geometry" ) );
}
}
return pt;
}
}
return QgsPointXY();
}
QgsCoordinateReferenceSystem QgsProcessingParameters::parameterAsPointCrs( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context )
{
QVariant val = parameters.value( definition->name() );
if ( val.canConvert< QgsReferencedPointXY >() )
{
QgsReferencedPointXY rr = val.value<QgsReferencedPointXY>();
if ( rr.crs().isValid() )
{
return rr.crs();
}
}
QRegularExpression rx( "^(.*?)\\s*,\\s*(.*?)\\s*(?:\\[(.*)\\])?\\s*$" );
QString valueAsString = parameterAsString( definition, parameters, context );
QRegularExpressionMatch match = rx.match( valueAsString );
if ( match.hasMatch() )
{
QgsCoordinateReferenceSystem crs( match.captured( 3 ) );
if ( crs.isValid() )
return crs;
}
if ( context.project() )
return context.project()->crs();
else
return QgsCoordinateReferenceSystem();
}
QString QgsProcessingParameters::parameterAsFile( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context )
{
if ( !definition )
return QString();
QString fileText = parameterAsString( definition, parameters, context );
if ( fileText.isEmpty() )
fileText = definition->defaultValue().toString();
return fileText;
}
QVariantList QgsProcessingParameters::parameterAsMatrix( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context )
{
if ( !definition )
return QVariantList();
QString resultString;
QVariant val = parameters.value( definition->name() );
if ( val.canConvert<QgsProperty>() )
resultString = val.value< QgsProperty >().valueAsString( context.expressionContext(), definition->defaultValue().toString() );
else if ( val.type() == QVariant::List )
return val.toList();
else
resultString = val.toString();
if ( resultString.isEmpty() )
{
// check default
if ( definition->defaultValue().type() == QVariant::List )
return definition->defaultValue().toList();
else
resultString = definition->defaultValue().toString();
}
QVariantList result;
Q_FOREACH ( const QString &s, resultString.split( ',' ) )
result << s;
return result;
}
QList<QgsMapLayer *> QgsProcessingParameters::parameterAsLayerList( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context )
{
if ( !definition )
return QList<QgsMapLayer *>();
QVariant val = parameters.value( definition->name() );
if ( QgsMapLayer *layer = qobject_cast< QgsMapLayer * >( qvariant_cast<QObject *>( val ) ) )
{
return QList<QgsMapLayer *>() << layer;
}
QList<QgsMapLayer *> layers;
QStringList resultStringList;
std::function< void( const QVariant &var ) > processVariant;
processVariant = [ &resultStringList, &layers, &context, &definition, &processVariant ]( const QVariant & var )
{
if ( var.type() == QVariant::List )
{
Q_FOREACH ( const QVariant &listVar, var.toList() )
{
processVariant( listVar );
}
}
else if ( var.type() == QVariant::StringList )
{
Q_FOREACH ( const QString &s, var.toStringList() )
{
resultStringList << s;
}
}
else if ( var.canConvert<QgsProperty>() )
resultStringList << var.value< QgsProperty >().valueAsString( context.expressionContext(), definition->defaultValue().toString() );
else if ( QgsMapLayer *layer = qobject_cast< QgsMapLayer * >( qvariant_cast<QObject *>( var ) ) )
{
layers << layer;
}
else
{
resultStringList << var.toString();
}
};
processVariant( val );
if ( layers.isEmpty() && ( resultStringList.isEmpty() || resultStringList.at( 0 ).isEmpty() ) )
{
resultStringList.clear();
// check default
if ( QgsMapLayer *layer = qobject_cast< QgsMapLayer * >( qvariant_cast<QObject *>( definition->defaultValue() ) ) )
{
layers << layer;
}
else if ( definition->defaultValue().type() == QVariant::List )
{
Q_FOREACH ( const QVariant &var, definition->defaultValue().toList() )
{
if ( QgsMapLayer *layer = qobject_cast< QgsMapLayer * >( qvariant_cast<QObject *>( var ) ) )
{
layers << layer;
}
else
{
resultStringList << var.toString();
}
}
}
else
resultStringList << definition->defaultValue().toString();
}
Q_FOREACH ( const QString &s, resultStringList )
{
QgsMapLayer *layer = QgsProcessingUtils::mapLayerFromString( s, context );
if ( layer )
layers << layer;
}
return layers;
}
QList<double> QgsProcessingParameters::parameterAsRange( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context )
{
if ( !definition )
return QList<double>();
QStringList resultStringList;
QVariant val = parameters.value( definition->name() );
if ( val.canConvert<QgsProperty>() )
resultStringList << val.value< QgsProperty >().valueAsString( context.expressionContext(), definition->defaultValue().toString() );
else if ( val.type() == QVariant::List )
{
Q_FOREACH ( const QVariant &var, val.toList() )
resultStringList << var.toString();
}
else
resultStringList << val.toString();
if ( ( resultStringList.isEmpty() || ( resultStringList.size() == 1 && resultStringList.at( 0 ).isEmpty() ) ) )
{
resultStringList.clear();
// check default
if ( definition->defaultValue().type() == QVariant::List )
{
Q_FOREACH ( const QVariant &var, definition->defaultValue().toList() )
resultStringList << var.toString();
}
else
resultStringList << definition->defaultValue().toString();
}
if ( resultStringList.size() == 1 )
{
resultStringList = resultStringList.at( 0 ).split( ',' );
}
if ( resultStringList.size() < 2 )
return QList< double >() << 0.0 << 0.0;
return QList< double >() << resultStringList.at( 0 ).toDouble() << resultStringList.at( 1 ).toDouble();
}
QStringList QgsProcessingParameters::parameterAsFields( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context )
{
if ( !definition )
return QStringList();
QStringList resultStringList;
QVariant val = parameters.value( definition->name() );
if ( val.isValid() )
{