/
qgsprocessingparameters.cpp
8381 lines (7083 loc) · 278 KB
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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 "qgsprocessingregistry.h"
#include "qgsprocessingparametertype.h"
#include "qgsrasterfilewriter.h"
#include "qgsvectorlayer.h"
#include "qgsmeshlayer.h"
#include "qgspointcloudlayer.h"
#include "qgsannotationlayer.h"
#include "qgsapplication.h"
#include "qgslayoutmanager.h"
#include "qgsprintlayout.h"
#include "qgssymbollayerutils.h"
#include "qgsfileutils.h"
#include "qgsproviderregistry.h"
#include <functional>
#include <QRegularExpression>
QVariant QgsProcessingFeatureSourceDefinition::toVariant() const
{
QVariantMap map;
map.insert( QStringLiteral( "source" ), source.toVariant() );
map.insert( QStringLiteral( "selected_only" ), selectedFeaturesOnly );
map.insert( QStringLiteral( "feature_limit" ), featureLimit );
map.insert( QStringLiteral( "flags" ), static_cast< int >( flags ) );
map.insert( QStringLiteral( "geometry_check" ), static_cast< int >( geometryCheck ) );
return map;
}
bool QgsProcessingFeatureSourceDefinition::loadVariant( const QVariantMap &map )
{
source.loadVariant( map.value( QStringLiteral( "source" ) ) );
selectedFeaturesOnly = map.value( QStringLiteral( "selected_only" ), false ).toBool();
featureLimit = map.value( QStringLiteral( "feature_limit" ), -1 ).toLongLong();
flags = static_cast< Flags >( map.value( QStringLiteral( "flags" ), 0 ).toInt() );
geometryCheck = static_cast< QgsFeatureRequest::InvalidGeometryCheck >( map.value( QStringLiteral( "geometry_check" ), QgsFeatureRequest::GeometryAbortOnInvalid ).toInt() );
return true;
}
//
// QgsProcessingOutputLayerDefinition
//
void QgsProcessingOutputLayerDefinition::setRemappingDefinition( const QgsRemappingSinkDefinition &definition )
{
mUseRemapping = true;
mRemappingDefinition = definition;
}
QVariant QgsProcessingOutputLayerDefinition::toVariant() const
{
QVariantMap map;
map.insert( QStringLiteral( "sink" ), sink.toVariant() );
map.insert( QStringLiteral( "create_options" ), createOptions );
if ( mUseRemapping )
map.insert( QStringLiteral( "remapping" ), QVariant::fromValue( mRemappingDefinition ) );
return map;
}
bool QgsProcessingOutputLayerDefinition::loadVariant( const QVariantMap &map )
{
sink.loadVariant( map.value( QStringLiteral( "sink" ) ) );
createOptions = map.value( QStringLiteral( "create_options" ) ).toMap();
if ( map.contains( QStringLiteral( "remapping" ) ) )
{
mUseRemapping = true;
mRemappingDefinition = map.value( QStringLiteral( "remapping" ) ).value< QgsRemappingSinkDefinition >();
}
else
{
mUseRemapping = false;
}
return true;
}
bool QgsProcessingOutputLayerDefinition::operator==( const QgsProcessingOutputLayerDefinition &other ) const
{
return sink == other.sink && destinationProject == other.destinationProject && destinationName == other.destinationName && createOptions == other.createOptions
&& mUseRemapping == other.mUseRemapping && mRemappingDefinition == other.mRemappingDefinition;
}
bool QgsProcessingOutputLayerDefinition::operator!=( const QgsProcessingOutputLayerDefinition &other ) const
{
return !( *this == other );
}
bool QgsProcessingParameters::isDynamic( const QVariantMap ¶meters, const QString &name )
{
const 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();
return parameterAsString( definition, parameters.value( definition->name() ), context );
}
QString QgsProcessingParameters::parameterAsString( const QgsProcessingParameterDefinition *definition, const QVariant &value, const QgsProcessingContext &context )
{
if ( !definition )
return QString();
QVariant val = value;
if ( val.canConvert<QgsProperty>() )
return val.value< QgsProperty >().valueAsString( context.expressionContext(), definition->defaultValue().toString() );
if ( !val.isValid() )
{
// fall back to default
val = definition->defaultValue();
}
if ( val == QgsProcessing::TEMPORARY_OUTPUT )
{
if ( const QgsProcessingDestinationParameter *destParam = dynamic_cast< const QgsProcessingDestinationParameter * >( definition ) )
return destParam->generateTemporaryDestination();
}
return val.toString();
}
QString QgsProcessingParameters::parameterAsExpression( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, const QgsProcessingContext &context )
{
if ( !definition )
return QString();
return parameterAsExpression( definition, parameters.value( definition->name() ), context );
}
QString QgsProcessingParameters::parameterAsExpression( const QgsProcessingParameterDefinition *definition, const QVariant &value, const QgsProcessingContext &context )
{
if ( !definition )
return QString();
const QVariant val = value;
if ( val.canConvert<QgsProperty>() )
return val.value< QgsProperty >().valueAsString( context.expressionContext(), definition->defaultValue().toString() );
if ( val.isValid() && !val.toString().isEmpty() )
{
const 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;
return parameterAsDouble( definition, parameters.value( definition->name() ), context );
}
double QgsProcessingParameters::parameterAsDouble( const QgsProcessingParameterDefinition *definition, const QVariant &value, const QgsProcessingContext &context )
{
if ( !definition )
return 0;
QVariant val = value;
if ( val.canConvert<QgsProperty>() )
return val.value< QgsProperty >().valueAsDouble( context.expressionContext(), definition->defaultValue().toDouble() );
bool ok = false;
const 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;
return parameterAsInt( definition, parameters.value( definition->name() ), context );
}
int QgsProcessingParameters::parameterAsInt( const QgsProcessingParameterDefinition *definition, const QVariant &value, const QgsProcessingContext &context )
{
if ( !definition )
return 0;
QVariant val = value;
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 )
{
const double round = std::round( dbl );
if ( round > std::numeric_limits<int>::max() || round < -std::numeric_limits<int>::max() )
{
//double too large to fit in int
return 0;
}
return static_cast< int >( std::round( dbl ) );
}
return val.toInt();
}
QList< int > QgsProcessingParameters::parameterAsInts( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, const QgsProcessingContext &context )
{
if ( !definition )
return QList< int >();
return parameterAsInts( definition, parameters.value( definition->name() ), context );
}
QList< int > QgsProcessingParameters::parameterAsInts( const QgsProcessingParameterDefinition *definition, const QVariant &value, const QgsProcessingContext &context )
{
if ( !definition )
return QList< int >();
QList< int > resultList;
const QVariant val = value;
if ( val.isValid() )
{
if ( val.canConvert<QgsProperty>() )
resultList << val.value< QgsProperty >().valueAsInt( context.expressionContext(), definition->defaultValue().toInt() );
else if ( val.type() == QVariant::List )
{
const QVariantList list = val.toList();
for ( auto it = list.constBegin(); it != list.constEnd(); ++it )
resultList << it->toInt();
}
else
{
const QStringList parts = val.toString().split( ';' );
for ( auto it = parts.constBegin(); it != parts.constEnd(); ++it )
resultList << it->toInt();
}
}
if ( resultList.isEmpty() )
{
// check default
if ( definition->defaultValue().isValid() )
{
if ( definition->defaultValue().type() == QVariant::List )
{
const QVariantList list = definition->defaultValue().toList();
for ( auto it = list.constBegin(); it != list.constEnd(); ++it )
resultList << it->toInt();
}
else
{
const QStringList parts = definition->defaultValue().toString().split( ';' );
for ( auto it = parts.constBegin(); it != parts.constEnd(); ++it )
resultList << it->toInt();
}
}
}
return resultList;
}
QDateTime QgsProcessingParameters::parameterAsDateTime( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, const QgsProcessingContext &context )
{
if ( !definition )
return QDateTime();
return parameterAsDateTime( definition, parameters.value( definition->name() ), context );
}
QDateTime QgsProcessingParameters::parameterAsDateTime( const QgsProcessingParameterDefinition *definition, const QVariant &value, const QgsProcessingContext &context )
{
if ( !definition )
return QDateTime();
QVariant val = value;
if ( val.canConvert<QgsProperty>() )
val = val.value< QgsProperty >().value( context.expressionContext(), definition->defaultValue() );
QDateTime d = val.toDateTime();
if ( !d.isValid() && val.type() == QVariant::String )
{
d = QDateTime::fromString( val.toString() );
}
if ( !d.isValid() )
{
// fall back to default
val = definition->defaultValue();
d = val.toDateTime();
}
if ( !d.isValid() && val.type() == QVariant::String )
{
d = QDateTime::fromString( val.toString() );
}
return d;
}
QDate QgsProcessingParameters::parameterAsDate( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, const QgsProcessingContext &context )
{
if ( !definition )
return QDate();
return parameterAsDate( definition, parameters.value( definition->name() ), context );
}
QDate QgsProcessingParameters::parameterAsDate( const QgsProcessingParameterDefinition *definition, const QVariant &value, const QgsProcessingContext &context )
{
if ( !definition )
return QDate();
QVariant val = value;
if ( val.canConvert<QgsProperty>() )
val = val.value< QgsProperty >().value( context.expressionContext(), definition->defaultValue() );
QDate d = val.toDate();
if ( !d.isValid() && val.type() == QVariant::String )
{
d = QDate::fromString( val.toString() );
}
if ( !d.isValid() )
{
// fall back to default
val = definition->defaultValue();
d = val.toDate();
}
if ( !d.isValid() && val.type() == QVariant::String )
{
d = QDate::fromString( val.toString() );
}
return d;
}
QTime QgsProcessingParameters::parameterAsTime( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, const QgsProcessingContext &context )
{
if ( !definition )
return QTime();
return parameterAsTime( definition, parameters.value( definition->name() ), context );
}
QTime QgsProcessingParameters::parameterAsTime( const QgsProcessingParameterDefinition *definition, const QVariant &value, const QgsProcessingContext &context )
{
if ( !definition )
return QTime();
QVariant val = value;
if ( val.canConvert<QgsProperty>() )
val = val.value< QgsProperty >().value( context.expressionContext(), definition->defaultValue() );
QTime d;
if ( val.type() == QVariant::DateTime )
d = val.toDateTime().time();
else
d = val.toTime();
if ( !d.isValid() && val.type() == QVariant::String )
{
d = QTime::fromString( val.toString() );
}
if ( !d.isValid() )
{
// fall back to default
val = definition->defaultValue();
d = val.toTime();
}
if ( !d.isValid() && val.type() == QVariant::String )
{
d = QTime::fromString( val.toString() );
}
return d;
}
int QgsProcessingParameters::parameterAsEnum( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, const QgsProcessingContext &context )
{
if ( !definition )
return 0;
return parameterAsEnum( definition, parameters.value( definition->name() ), context );
}
int QgsProcessingParameters::parameterAsEnum( const QgsProcessingParameterDefinition *definition, const QVariant &value, const QgsProcessingContext &context )
{
if ( !definition )
return 0;
const int val = parameterAsInt( definition, value, 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>();
return parameterAsEnums( definition, parameters.value( definition->name() ), context );
}
QList<int> QgsProcessingParameters::parameterAsEnums( const QgsProcessingParameterDefinition *definition, const QVariant &value, const QgsProcessingContext &context )
{
if ( !definition )
return QList<int>();
QVariantList resultList;
const QVariant val = value;
if ( val.canConvert<QgsProperty>() )
resultList << val.value< QgsProperty >().valueAsString( context.expressionContext(), definition->defaultValue().toString() );
else if ( val.type() == QVariant::List )
{
const auto constToList = val.toList();
for ( const QVariant &var : constToList )
resultList << var;
}
else if ( val.type() == QVariant::String )
{
const auto constSplit = val.toString().split( ',' );
for ( const QString &var : constSplit )
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 )
{
const auto constToList = definition->defaultValue().toList();
for ( const QVariant &var : constToList )
resultList << var;
}
else if ( definition->defaultValue().type() == QVariant::String )
{
const auto constSplit = definition->defaultValue().toString().split( ',' );
for ( const QString &var : constSplit )
resultList << var;
}
else
resultList << definition->defaultValue();
}
QList< int > result;
const QgsProcessingParameterEnum *enumDef = dynamic_cast< const QgsProcessingParameterEnum *>( definition );
const auto constResultList = resultList;
for ( const QVariant &var : constResultList )
{
const int resInt = var.toInt();
if ( !enumDef || resInt < enumDef->options().size() )
{
result << resInt;
}
}
return result;
}
QString QgsProcessingParameters::parameterAsEnumString( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, const QgsProcessingContext &context )
{
if ( !definition )
return QString();
return parameterAsEnumString( definition, parameters.value( definition->name() ), context );
}
QString QgsProcessingParameters::parameterAsEnumString( const QgsProcessingParameterDefinition *definition, const QVariant &value, const QgsProcessingContext &context )
{
if ( !definition )
return QString();
QString enumText = parameterAsString( definition, value, context );
const QgsProcessingParameterEnum *enumDef = dynamic_cast< const QgsProcessingParameterEnum *>( definition );
if ( enumText.isEmpty() || !enumDef->options().contains( enumText ) )
enumText = definition->defaultValue().toString();
return enumText;
}
QStringList QgsProcessingParameters::parameterAsEnumStrings( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, const QgsProcessingContext &context )
{
if ( !definition )
return QStringList();
return parameterAsEnumStrings( definition, parameters.value( definition->name() ), context );
}
QStringList QgsProcessingParameters::parameterAsEnumStrings( const QgsProcessingParameterDefinition *definition, const QVariant &value, const QgsProcessingContext &context )
{
if ( !definition )
return QStringList();
const QVariant val = value;
QStringList enumValues;
std::function< void( const QVariant &var ) > processVariant;
processVariant = [ &enumValues, &context, &definition, &processVariant ]( const QVariant & var )
{
if ( var.type() == QVariant::List )
{
const auto constToList = var.toList();
for ( const QVariant &listVar : constToList )
{
processVariant( listVar );
}
}
else if ( var.type() == QVariant::StringList )
{
const auto constToStringList = var.toStringList();
for ( const QString &s : constToStringList )
{
processVariant( s );
}
}
else if ( var.canConvert<QgsProperty>() )
processVariant( var.value< QgsProperty >().valueAsString( context.expressionContext(), definition->defaultValue().toString() ) );
else
{
const QStringList parts = var.toString().split( ',' );
for ( const QString &s : parts )
{
enumValues << s;
}
}
};
processVariant( val );
const QgsProcessingParameterEnum *enumDef = dynamic_cast< const QgsProcessingParameterEnum *>( definition );
// check that values are valid enum values. The resulting set will be empty
// if all values are present in the enumDef->options(), otherwise it will contain
// values which are invalid
#if QT_VERSION < QT_VERSION_CHECK(5, 14, 0)
QSet<QString> subtraction = enumValues.toSet().subtract( enumDef->options().toSet() );
#else
const QStringList options = enumDef->options();
const QSet<QString> subtraction = QSet<QString>( enumValues.begin(), enumValues.end() ).subtract( QSet<QString>( options.begin(), options.end() ) );
#endif
if ( enumValues.isEmpty() || !subtraction.isEmpty() )
{
enumValues.clear();
processVariant( definition->defaultValue() );
}
return enumValues;
}
bool QgsProcessingParameters::parameterAsBool( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, const QgsProcessingContext &context )
{
if ( !definition )
return false;
return parameterAsBool( definition, parameters.value( definition->name() ), context );
}
bool QgsProcessingParameters::parameterAsBoolean( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, const QgsProcessingContext &context )
{
if ( !definition )
return false;
return parameterAsBoolean( definition, parameters.value( definition->name() ), context );
}
bool QgsProcessingParameters::parameterAsBool( const QgsProcessingParameterDefinition *definition, const QVariant &value, const QgsProcessingContext &context )
{
if ( !definition )
return false;
const QVariant def = definition->defaultValue();
const QVariant val = value;
if ( val.canConvert<QgsProperty>() )
return val.value< QgsProperty >().valueAsBool( context.expressionContext(), def.toBool() );
else if ( val.isValid() )
return val.toBool();
else
return def.toBool();
}
bool QgsProcessingParameters::parameterAsBoolean( const QgsProcessingParameterDefinition *definition, const QVariant &value, const QgsProcessingContext &context )
{
if ( !definition )
return false;
const QVariant def = definition->defaultValue();
const QVariant val = value;
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, QgsFeatureSink::SinkFlags sinkFlags,
const QVariantMap &createOptions, const QStringList &datasourceOptions, const QStringList &layerOptions )
{
QVariant val;
if ( definition )
{
val = parameters.value( definition->name() );
}
return parameterAsSink( definition, val, fields, geometryType, crs, context, destinationIdentifier, sinkFlags, createOptions, datasourceOptions, layerOptions );
}
QgsFeatureSink *QgsProcessingParameters::parameterAsSink( const QgsProcessingParameterDefinition *definition, const QVariant &value, const QgsFields &fields, QgsWkbTypes::Type geometryType, const QgsCoordinateReferenceSystem &crs, QgsProcessingContext &context, QString &destinationIdentifier, QgsFeatureSink::SinkFlags sinkFlags, const QVariantMap &createOptions, const QStringList &datasourceOptions, const QStringList &layerOptions )
{
QVariantMap options = createOptions;
QVariant val = value;
QgsProject *destinationProject = nullptr;
QString destName;
QgsRemappingSinkDefinition remapDefinition;
bool useRemapDefinition = false;
if ( val.canConvert<QgsProcessingOutputLayerDefinition>() )
{
// input is a QgsProcessingOutputLayerDefinition - get extra properties from it
const QgsProcessingOutputLayerDefinition fromVar = qvariant_cast<QgsProcessingOutputLayerDefinition>( val );
destinationProject = fromVar.destinationProject;
options = fromVar.createOptions;
val = fromVar.sink;
destName = fromVar.destinationName;
if ( fromVar.useRemapping() )
{
useRemapDefinition = true;
remapDefinition = fromVar.remappingDefinition();
}
}
QString dest;
if ( definition && 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
if ( !definition )
{
throw QgsProcessingException( QObject::tr( "No parameter definition for the sink" ) );
}
dest = definition->defaultValue().toString();
}
else
{
dest = val.toString();
}
if ( dest == QgsProcessing::TEMPORARY_OUTPUT )
{
if ( const QgsProcessingDestinationParameter *destParam = dynamic_cast< const QgsProcessingDestinationParameter * >( definition ) )
dest = destParam->generateTemporaryDestination();
}
if ( dest.isEmpty() )
return nullptr;
std::unique_ptr< QgsFeatureSink > sink( QgsProcessingUtils::createFeatureSink( dest, context, fields, geometryType, crs, options, datasourceOptions, layerOptions, sinkFlags, useRemapDefinition ? &remapDefinition : nullptr ) );
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, QgsProcessingUtils::LayerHint::Vector ) );
}
return sink.release();
}
QgsProcessingFeatureSource *QgsProcessingParameters::parameterAsSource( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context )
{
if ( !definition )
return nullptr;
return parameterAsSource( definition, parameters.value( definition->name() ), context );
}
QgsProcessingFeatureSource *QgsProcessingParameters::parameterAsSource( const QgsProcessingParameterDefinition *definition, const QVariant &value, QgsProcessingContext &context )
{
if ( !definition )
return nullptr;
return QgsProcessingUtils::variantToSource( value, context, definition->defaultValue() );
}
QString parameterAsCompatibleSourceLayerPathInternal( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context, const QStringList &compatibleFormats, const QString &preferredFormat, QgsProcessingFeedback *feedback, QString *layerName )
{
if ( !definition )
return QString();
QVariant val = parameters.value( definition->name() );
bool selectedFeaturesOnly = false;
long long featureLimit = -1;
if ( val.canConvert<QgsProcessingFeatureSourceDefinition>() )
{
// input is a QgsProcessingFeatureSourceDefinition - get extra properties from it
const QgsProcessingFeatureSourceDefinition fromVar = qvariant_cast<QgsProcessingFeatureSourceDefinition>( val );
selectedFeaturesOnly = fromVar.selectedFeaturesOnly;
featureLimit = fromVar.featureLimit;
val = fromVar.source;
}
else if ( val.canConvert<QgsProcessingOutputLayerDefinition>() )
{
// input is a QgsProcessingOutputLayerDefinition - get extra properties from it
const QgsProcessingOutputLayerDefinition fromVar = qvariant_cast<QgsProcessingOutputLayerDefinition>( val );
val = fromVar.sink;
}
if ( val.canConvert<QgsProperty>() )
{
val = val.value< QgsProperty >().valueAsString( context.expressionContext(), definition->defaultValue().toString() );
}
QgsVectorLayer *vl = nullptr;
vl = qobject_cast< QgsVectorLayer * >( qvariant_cast<QObject *>( val ) );
if ( !vl )
{
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
val = definition->defaultValue();
// default value may be a vector layer
vl = qobject_cast< QgsVectorLayer * >( qvariant_cast<QObject *>( val ) );
if ( !vl )
layerRef = definition->defaultValue().toString();
}
else
{
layerRef = val.toString();
}
if ( !vl )
{
if ( layerRef.isEmpty() )
return QString();
vl = qobject_cast< QgsVectorLayer *>( QgsProcessingUtils::mapLayerFromString( layerRef, context, true, QgsProcessingUtils::LayerHint::Vector ) );
}
}
if ( !vl )
return QString();
if ( layerName )
return QgsProcessingUtils::convertToCompatibleFormatAndLayerName( vl, selectedFeaturesOnly, definition->name(),
compatibleFormats, preferredFormat, context, feedback, *layerName, featureLimit );
else
return QgsProcessingUtils::convertToCompatibleFormat( vl, selectedFeaturesOnly, definition->name(),
compatibleFormats, preferredFormat, context, feedback, featureLimit );
}
QString QgsProcessingParameters::parameterAsCompatibleSourceLayerPath( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context, const QStringList &compatibleFormats, const QString &preferredFormat, QgsProcessingFeedback *feedback )
{
return parameterAsCompatibleSourceLayerPathInternal( definition, parameters, context, compatibleFormats, preferredFormat, feedback, nullptr );
}
QString QgsProcessingParameters::parameterAsCompatibleSourceLayerPathAndLayerName( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context, const QStringList &compatibleFormats, const QString &preferredFormat, QgsProcessingFeedback *feedback, QString *layerName )
{
QString *destLayer = layerName;
QString tmp;
if ( destLayer )
destLayer->clear();
else
destLayer = &tmp;
return parameterAsCompatibleSourceLayerPathInternal( definition, parameters, context, compatibleFormats, preferredFormat, feedback, destLayer );
}
QgsMapLayer *QgsProcessingParameters::parameterAsLayer( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context, QgsProcessingUtils::LayerHint layerHint )
{
if ( !definition )
return nullptr;
return parameterAsLayer( definition, parameters.value( definition->name() ), context, layerHint );
}
QgsMapLayer *QgsProcessingParameters::parameterAsLayer( const QgsProcessingParameterDefinition *definition, const QVariant &value, QgsProcessingContext &context, QgsProcessingUtils::LayerHint layerHint )
{
if ( !definition )
return nullptr;
QVariant val = value;
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.canConvert<QgsProcessingOutputLayerDefinition>() )
{
// input is a QgsProcessingOutputLayerDefinition - get extra properties from it
const QgsProcessingOutputLayerDefinition fromVar = qvariant_cast<QgsProcessingOutputLayerDefinition>( val );
val = fromVar.sink;
}
if ( val.canConvert<QgsProperty>() && val.value< QgsProperty >().propertyType() == QgsProperty::StaticProperty )
{
val = val.value< QgsProperty >().staticValue();
}
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, true, layerHint );
}
QgsRasterLayer *QgsProcessingParameters::parameterAsRasterLayer( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context )
{
return qobject_cast< QgsRasterLayer *>( parameterAsLayer( definition, parameters, context, QgsProcessingUtils::LayerHint::Raster ) );
}
QgsRasterLayer *QgsProcessingParameters::parameterAsRasterLayer( const QgsProcessingParameterDefinition *definition, const QVariant &value, QgsProcessingContext &context )
{
return qobject_cast< QgsRasterLayer *>( parameterAsLayer( definition, value, context, QgsProcessingUtils::LayerHint::Raster ) );
}
QgsMeshLayer *QgsProcessingParameters::parameterAsMeshLayer( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context )
{
return qobject_cast< QgsMeshLayer *>( parameterAsLayer( definition, parameters, context, QgsProcessingUtils::LayerHint::Mesh ) );
}
QgsMeshLayer *QgsProcessingParameters::parameterAsMeshLayer( const QgsProcessingParameterDefinition *definition, const QVariant &value, QgsProcessingContext &context )
{
return qobject_cast< QgsMeshLayer *>( parameterAsLayer( definition, value, context, QgsProcessingUtils::LayerHint::Mesh ) );
}
QString QgsProcessingParameters::parameterAsOutputLayer( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context )
{
QVariant val;
if ( definition )
{
val = parameters.value( definition->name() );
}
return parameterAsOutputLayer( definition, val, context );
}
QString QgsProcessingParameters::parameterAsOutputLayer( const QgsProcessingParameterDefinition *definition, const QVariant &value, QgsProcessingContext &context )
{
QVariant val = value;
QgsProject *destinationProject = nullptr;
QString destName;
if ( val.canConvert<QgsProcessingOutputLayerDefinition>() )
{
// input is a QgsProcessingOutputLayerDefinition - get extra properties from it
const QgsProcessingOutputLayerDefinition fromVar = qvariant_cast<QgsProcessingOutputLayerDefinition>( val );
destinationProject = fromVar.destinationProject;
val = fromVar.sink;
destName = fromVar.destinationName;
}
QString dest;
if ( definition && 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 ( dest == QgsProcessing::TEMPORARY_OUTPUT )
{
if ( const QgsProcessingDestinationParameter *destParam = dynamic_cast< const QgsProcessingDestinationParameter * >( definition ) )
dest = destParam->generateTemporaryDestination();
}
if ( destinationProject )
{
QString outputName;
if ( destName.isEmpty() && definition )
{
destName = definition->description();
}
if ( definition )
outputName = definition->name();
QgsProcessingUtils::LayerHint layerTypeHint = QgsProcessingUtils::LayerHint::UnknownType;
if ( definition && definition->type() == QgsProcessingParameterVectorDestination::typeName() )
layerTypeHint = QgsProcessingUtils::LayerHint::Vector;
else if ( definition && definition->type() == QgsProcessingParameterRasterDestination::typeName() )
layerTypeHint = QgsProcessingUtils::LayerHint::Raster;
context.addLayerToLoadOnCompletion( dest, QgsProcessingContext::LayerDetails( destName, destinationProject, outputName, layerTypeHint ) );
}
return dest;
}
QString QgsProcessingParameters::parameterAsFileOutput( const QgsProcessingParameterDefinition *definition, const QVariantMap ¶meters, QgsProcessingContext &context )
{
QVariant val;
if ( definition )
{
val = parameters.value( definition->name() );