/***************************************************************************
qgsexpressionfunction.cpp
-------------------
begin : May 2017
copyright : (C) 2017 Matthias Kuhn
email : matthias@opengis.ch
***************************************************************************
* *
* 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 "qgsexpressionfunction.h"
#include "qgsexpressionutils.h"
#include "qgsexpressionnodeimpl.h"
#include "qgsfeaturerequest.h"
#include "qgsstringutils.h"
#include "qgsmultipoint.h"
#include "qgsgeometryutils.h"
#include "qgsmultilinestring.h"
#include "qgslinestring.h"
#include "qgscurvepolygon.h"
#include "qgsmaptopixelgeometrysimplifier.h"
#include "qgspolygon.h"
#include "qgstriangle.h"
#include "qgscurve.h"
#include "qgsregularpolygon.h"
#include "qgsmultipolygon.h"
#include "qgsogcutils.h"
#include "qgsdistancearea.h"
#include "qgsgeometryengine.h"
#include "qgsexpressionsorter.h"
#include "qgssymbollayerutils.h"
#include "qgsstyle.h"
#include "qgsexception.h"
#include "qgsmessagelog.h"
#include "qgsrasterlayer.h"
#include "qgsvectorlayer.h"
#include "qgsrasterbandstats.h"
#include "qgscolorramp.h"
#include "qgsfieldformatterregistry.h"
#include "qgsfieldformatter.h"
#include "qgsvectorlayerfeatureiterator.h"
const QString QgsExpressionFunction::helpText() const
{
return mHelpText.isEmpty() ? QgsExpression::helpText( mName ) : mHelpText;
}
QVariant QgsExpressionFunction::run( QgsExpressionNode::NodeList *args, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction *node )
{
Q_UNUSED( node )
// evaluate arguments
QVariantList argValues;
if ( args )
{
int arg = 0;
const QList< QgsExpressionNode * > argList = args->list();
for ( QgsExpressionNode *n : argList )
{
QVariant v;
if ( lazyEval() )
{
// Pass in the node for the function to eval as it needs.
v = QVariant::fromValue( n );
}
else
{
v = n->eval( parent, context );
ENSURE_NO_EVAL_ERROR;
bool defaultParamIsNull = mParameterList.count() > arg && mParameterList.at( arg ).optional() && !mParameterList.at( arg ).defaultValue().isValid();
if ( QgsExpressionUtils::isNull( v ) && !defaultParamIsNull && !handlesNull() )
return QVariant(); // all "normal" functions return NULL, when any QgsExpressionFunction::Parameter is NULL (so coalesce is abnormal)
}
argValues.append( v );
arg++;
}
}
return func( argValues, context, parent, node );
}
bool QgsExpressionFunction::usesGeometry( const QgsExpressionNodeFunction *node ) const
{
Q_UNUSED( node )
return true;
}
QStringList QgsExpressionFunction::aliases() const
{
return QStringList();
}
bool QgsExpressionFunction::isStatic( const QgsExpressionNodeFunction *node, QgsExpression *parent, const QgsExpressionContext *context ) const
{
Q_UNUSED( parent )
Q_UNUSED( context )
Q_UNUSED( node )
return false;
}
bool QgsExpressionFunction::prepare( const QgsExpressionNodeFunction *node, QgsExpression *parent, const QgsExpressionContext *context ) const
{
Q_UNUSED( parent )
Q_UNUSED( context )
Q_UNUSED( node )
return true;
}
QSet<QString> QgsExpressionFunction::referencedColumns( const QgsExpressionNodeFunction *node ) const
{
Q_UNUSED( node )
return QSet<QString>() << QgsFeatureRequest::ALL_ATTRIBUTES;
}
bool QgsExpressionFunction::isDeprecated() const
{
return mGroups.isEmpty() ? false : mGroups.contains( QStringLiteral( "deprecated" ) );
}
bool QgsExpressionFunction::operator==( const QgsExpressionFunction &other ) const
{
return ( QString::compare( mName, other.mName, Qt::CaseInsensitive ) == 0 );
}
bool QgsExpressionFunction::handlesNull() const
{
return mHandlesNull;
}
// doxygen doesn't like this constructor for some reason (maybe the function arguments?)
///@cond PRIVATE
QgsStaticExpressionFunction::QgsStaticExpressionFunction( const QString &fnname, const QgsExpressionFunction::ParameterList ¶ms,
FcnEval fcn,
const QString &group,
const QString &helpText,
const std::function < bool ( const QgsExpressionNodeFunction *node ) > &usesGeometry,
const std::function < QSet<QString>( const QgsExpressionNodeFunction *node ) > &referencedColumns,
bool lazyEval,
const QStringList &aliases,
bool handlesNull )
: QgsExpressionFunction( fnname, params, group, helpText, lazyEval, handlesNull )
, mFnc( fcn )
, mAliases( aliases )
, mUsesGeometry( false )
, mUsesGeometryFunc( usesGeometry )
, mReferencedColumnsFunc( referencedColumns )
{
}
///@endcond
QStringList QgsStaticExpressionFunction::aliases() const
{
return mAliases;
}
bool QgsStaticExpressionFunction::usesGeometry( const QgsExpressionNodeFunction *node ) const
{
if ( mUsesGeometryFunc )
return mUsesGeometryFunc( node );
else
return mUsesGeometry;
}
QSet<QString> QgsStaticExpressionFunction::referencedColumns( const QgsExpressionNodeFunction *node ) const
{
if ( mReferencedColumnsFunc )
return mReferencedColumnsFunc( node );
else
return mReferencedColumns;
}
bool QgsStaticExpressionFunction::isStatic( const QgsExpressionNodeFunction *node, QgsExpression *parent, const QgsExpressionContext *context ) const
{
if ( mIsStaticFunc )
return mIsStaticFunc( node, parent, context );
else
return mIsStatic;
}
bool QgsStaticExpressionFunction::prepare( const QgsExpressionNodeFunction *node, QgsExpression *parent, const QgsExpressionContext *context ) const
{
if ( mPrepareFunc )
return mPrepareFunc( node, parent, context );
return true;
}
void QgsStaticExpressionFunction::setIsStaticFunction( const std::function<bool ( const QgsExpressionNodeFunction *, QgsExpression *, const QgsExpressionContext * )> &isStatic )
{
mIsStaticFunc = isStatic;
}
void QgsStaticExpressionFunction::setIsStatic( bool isStatic )
{
mIsStaticFunc = nullptr;
mIsStatic = isStatic;
}
void QgsStaticExpressionFunction::setPrepareFunction( const std::function<bool ( const QgsExpressionNodeFunction *, QgsExpression *, const QgsExpressionContext * )> &prepareFunc )
{
mPrepareFunc = prepareFunc;
}
bool QgsExpressionFunction::allParamsStatic( const QgsExpressionNodeFunction *node, QgsExpression *parent, const QgsExpressionContext *context )
{
if ( node && node->args() )
{
const QList< QgsExpressionNode * > argList = node->args()->list();
for ( QgsExpressionNode *argNode : argList )
{
if ( !argNode->isStatic( parent, context ) )
return false;
}
}
return true;
}
static QVariant fcnGenerateSeries( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double start = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
double stop = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
double step = QgsExpressionUtils::getDoubleValue( values.at( 2 ), parent );
if ( step == 0.0 || ( step > 0.0 && start > stop ) || ( step < 0.0 && start < stop ) )
return QVariant();
QVariantList array;
int length = 1;
array << start;
double current = start + step;
while ( ( ( step > 0.0 && current <= stop ) || ( step < 0.0 && current >= stop ) ) && length <= 1000000 )
{
array << current;
current += step;
length++;
}
return array;
}
static QVariant fcnGetVariable( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
if ( !context )
return QVariant();
QString name = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
return context->variable( name );
}
static QVariant fcnEval( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
if ( !context )
return QVariant();
QString expString = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
QgsExpression expression( expString );
return expression.evaluate( context );
}
static QVariant fcnSqrt( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double x = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
return QVariant( std::sqrt( x ) );
}
static QVariant fcnAbs( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double val = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
return QVariant( std::fabs( val ) );
}
static QVariant fcnRadians( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double deg = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
return ( deg * M_PI ) / 180;
}
static QVariant fcnDegrees( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double rad = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
return ( 180 * rad ) / M_PI;
}
static QVariant fcnSin( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double x = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
return QVariant( std::sin( x ) );
}
static QVariant fcnCos( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double x = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
return QVariant( std::cos( x ) );
}
static QVariant fcnTan( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double x = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
return QVariant( std::tan( x ) );
}
static QVariant fcnAsin( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double x = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
return QVariant( std::asin( x ) );
}
static QVariant fcnAcos( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double x = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
return QVariant( std::acos( x ) );
}
static QVariant fcnAtan( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double x = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
return QVariant( std::atan( x ) );
}
static QVariant fcnAtan2( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double y = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
double x = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
return QVariant( std::atan2( y, x ) );
}
static QVariant fcnExp( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double x = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
return QVariant( std::exp( x ) );
}
static QVariant fcnLn( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double x = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
if ( x <= 0 )
return QVariant();
return QVariant( std::log( x ) );
}
static QVariant fcnLog10( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double x = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
if ( x <= 0 )
return QVariant();
return QVariant( log10( x ) );
}
static QVariant fcnLog( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double b = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
double x = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
if ( x <= 0 || b <= 0 )
return QVariant();
return QVariant( std::log( x ) / std::log( b ) );
}
static QVariant fcnRndF( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double min = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
double max = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
if ( max < min )
return QVariant();
// Return a random double in the range [min, max] (inclusive)
double f = static_cast< double >( qrand() ) / RAND_MAX;
return QVariant( min + f * ( max - min ) );
}
static QVariant fcnRnd( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
qlonglong min = QgsExpressionUtils::getIntValue( values.at( 0 ), parent );
qlonglong max = QgsExpressionUtils::getIntValue( values.at( 1 ), parent );
if ( max < min )
return QVariant();
// Return a random integer in the range [min, max] (inclusive)
return QVariant( min + ( qrand() % static_cast< qlonglong >( max - min + 1 ) ) );
}
static QVariant fcnLinearScale( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double val = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
double domainMin = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
double domainMax = QgsExpressionUtils::getDoubleValue( values.at( 2 ), parent );
double rangeMin = QgsExpressionUtils::getDoubleValue( values.at( 3 ), parent );
double rangeMax = QgsExpressionUtils::getDoubleValue( values.at( 4 ), parent );
if ( domainMin >= domainMax )
{
parent->setEvalErrorString( QObject::tr( "Domain max must be greater than domain min" ) );
return QVariant();
}
// outside of domain?
if ( val >= domainMax )
{
return rangeMax;
}
else if ( val <= domainMin )
{
return rangeMin;
}
// calculate linear scale
double m = ( rangeMax - rangeMin ) / ( domainMax - domainMin );
double c = rangeMin - ( domainMin * m );
// Return linearly scaled value
return QVariant( m * val + c );
}
static QVariant fcnExpScale( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double val = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
double domainMin = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
double domainMax = QgsExpressionUtils::getDoubleValue( values.at( 2 ), parent );
double rangeMin = QgsExpressionUtils::getDoubleValue( values.at( 3 ), parent );
double rangeMax = QgsExpressionUtils::getDoubleValue( values.at( 4 ), parent );
double exponent = QgsExpressionUtils::getDoubleValue( values.at( 5 ), parent );
if ( domainMin >= domainMax )
{
parent->setEvalErrorString( QObject::tr( "Domain max must be greater than domain min" ) );
return QVariant();
}
if ( exponent <= 0 )
{
parent->setEvalErrorString( QObject::tr( "Exponent must be greater than 0" ) );
return QVariant();
}
// outside of domain?
if ( val >= domainMax )
{
return rangeMax;
}
else if ( val <= domainMin )
{
return rangeMin;
}
// Return exponentially scaled value
return QVariant( ( ( rangeMax - rangeMin ) / std::pow( domainMax - domainMin, exponent ) ) * std::pow( val - domainMin, exponent ) + rangeMin );
}
static QVariant fcnMax( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariant result( QVariant::Double );
double maxVal = std::numeric_limits<double>::quiet_NaN();
for ( const QVariant &val : values )
{
double testVal = val.isNull() ? std::numeric_limits<double>::quiet_NaN() : QgsExpressionUtils::getDoubleValue( val, parent );
if ( std::isnan( maxVal ) )
{
maxVal = testVal;
}
else if ( !std::isnan( testVal ) )
{
maxVal = std::max( maxVal, testVal );
}
}
if ( !std::isnan( maxVal ) )
{
result = QVariant( maxVal );
}
return result;
}
static QVariant fcnMin( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariant result( QVariant::Double );
double minVal = std::numeric_limits<double>::quiet_NaN();
for ( const QVariant &val : values )
{
double testVal = val.isNull() ? std::numeric_limits<double>::quiet_NaN() : QgsExpressionUtils::getDoubleValue( val, parent );
if ( std::isnan( minVal ) )
{
minVal = testVal;
}
else if ( !std::isnan( testVal ) )
{
minVal = std::min( minVal, testVal );
}
}
if ( !std::isnan( minVal ) )
{
result = QVariant( minVal );
}
return result;
}
static QVariant fcnAggregate( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
//lazy eval, so we need to evaluate nodes now
//first node is layer id or name
QgsExpressionNode *node = QgsExpressionUtils::getNode( values.at( 0 ), parent );
ENSURE_NO_EVAL_ERROR;
QVariant value = node->eval( parent, context );
ENSURE_NO_EVAL_ERROR;
QgsVectorLayer *vl = QgsExpressionUtils::getVectorLayer( value, parent );
if ( !vl )
{
parent->setEvalErrorString( QObject::tr( "Cannot find layer with name or ID '%1'" ).arg( value.toString() ) );
return QVariant();
}
// second node is aggregate type
node = QgsExpressionUtils::getNode( values.at( 1 ), parent );
ENSURE_NO_EVAL_ERROR;
value = node->eval( parent, context );
ENSURE_NO_EVAL_ERROR;
bool ok = false;
QgsAggregateCalculator::Aggregate aggregate = QgsAggregateCalculator::stringToAggregate( QgsExpressionUtils::getStringValue( value, parent ), &ok );
if ( !ok )
{
parent->setEvalErrorString( QObject::tr( "No such aggregate '%1'" ).arg( value.toString() ) );
return QVariant();
}
// third node is subexpression (or field name)
node = QgsExpressionUtils::getNode( values.at( 2 ), parent );
ENSURE_NO_EVAL_ERROR;
QString subExpression = node->dump();
QgsAggregateCalculator::AggregateParameters parameters;
//optional forth node is filter
if ( values.count() > 3 )
{
node = QgsExpressionUtils::getNode( values.at( 3 ), parent );
ENSURE_NO_EVAL_ERROR;
QgsExpressionNodeLiteral *nl = dynamic_cast< QgsExpressionNodeLiteral * >( node );
if ( !nl || nl->value().isValid() )
parameters.filter = node->dump();
}
//optional fifth node is concatenator
if ( values.count() > 4 )
{
node = QgsExpressionUtils::getNode( values.at( 4 ), parent );
ENSURE_NO_EVAL_ERROR;
value = node->eval( parent, context );
ENSURE_NO_EVAL_ERROR;
parameters.delimiter = value.toString();
}
QVariant result;
if ( context )
{
QString cacheKey;
QgsExpression subExp( subExpression );
QgsExpression filterExp( parameters.filter );
if ( filterExp.referencedVariables().contains( QStringLiteral( "parent" ) )
|| filterExp.referencedVariables().contains( QString() )
|| subExp.referencedVariables().contains( QStringLiteral( "parent" ) )
|| subExp.referencedVariables().contains( QString() ) )
{
cacheKey = QStringLiteral( "aggfcn:%1:%2:%3:%4:%5%6" ).arg( vl->id(), QString::number( aggregate ), subExpression, parameters.filter,
QString::number( context->feature().id() ), QString( qHash( context->feature() ) ) );
}
else
{
cacheKey = QStringLiteral( "aggfcn:%1:%2:%3:%4" ).arg( vl->id(), QString::number( aggregate ), subExpression, parameters.filter );
}
if ( context && context->hasCachedValue( cacheKey ) )
return context->cachedValue( cacheKey );
QgsExpressionContext subContext( *context );
QgsExpressionContextScope *subScope = new QgsExpressionContextScope();
subScope->setVariable( QStringLiteral( "parent" ), context->feature() );
subContext.appendScope( subScope );
result = vl->aggregate( aggregate, subExpression, parameters, &subContext, &ok );
context->setCachedValue( cacheKey, result );
}
else
{
result = vl->aggregate( aggregate, subExpression, parameters, nullptr, &ok );
}
if ( !ok )
{
parent->setEvalErrorString( QObject::tr( "Could not calculate aggregate for: %1" ).arg( subExpression ) );
return QVariant();
}
return result;
}
static QVariant fcnAggregateRelation( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
if ( !context )
{
parent->setEvalErrorString( QObject::tr( "Cannot use relation aggregate function in this context" ) );
return QVariant();
}
// first step - find current layer
QgsVectorLayer *vl = QgsExpressionUtils::getVectorLayer( context->variable( QStringLiteral( "layer" ) ), parent );
if ( !vl )
{
parent->setEvalErrorString( QObject::tr( "Cannot use relation aggregate function in this context" ) );
return QVariant();
}
//lazy eval, so we need to evaluate nodes now
//first node is relation name
QgsExpressionNode *node = QgsExpressionUtils::getNode( values.at( 0 ), parent );
ENSURE_NO_EVAL_ERROR;
QVariant value = node->eval( parent, context );
ENSURE_NO_EVAL_ERROR;
QString relationId = value.toString();
// check relation exists
QgsRelation relation = QgsProject::instance()->relationManager()->relation( relationId );
if ( !relation.isValid() || relation.referencedLayer() != vl )
{
// check for relations by name
QList< QgsRelation > relations = QgsProject::instance()->relationManager()->relationsByName( relationId );
if ( relations.isEmpty() || relations.at( 0 ).referencedLayer() != vl )
{
parent->setEvalErrorString( QObject::tr( "Cannot find relation with id '%1'" ).arg( relationId ) );
return QVariant();
}
else
{
relation = relations.at( 0 );
}
}
QgsVectorLayer *childLayer = relation.referencingLayer();
// second node is aggregate type
node = QgsExpressionUtils::getNode( values.at( 1 ), parent );
ENSURE_NO_EVAL_ERROR;
value = node->eval( parent, context );
ENSURE_NO_EVAL_ERROR;
bool ok = false;
QgsAggregateCalculator::Aggregate aggregate = QgsAggregateCalculator::stringToAggregate( QgsExpressionUtils::getStringValue( value, parent ), &ok );
if ( !ok )
{
parent->setEvalErrorString( QObject::tr( "No such aggregate '%1'" ).arg( value.toString() ) );
return QVariant();
}
//third node is subexpression (or field name)
node = QgsExpressionUtils::getNode( values.at( 2 ), parent );
ENSURE_NO_EVAL_ERROR;
QString subExpression = node->dump();
//optional fourth node is concatenator
QgsAggregateCalculator::AggregateParameters parameters;
if ( values.count() > 3 )
{
node = QgsExpressionUtils::getNode( values.at( 3 ), parent );
ENSURE_NO_EVAL_ERROR;
value = node->eval( parent, context );
ENSURE_NO_EVAL_ERROR;
parameters.delimiter = value.toString();
}
FEAT_FROM_CONTEXT( context, f );
parameters.filter = relation.getRelatedFeaturesFilter( f );
QString cacheKey = QStringLiteral( "relagg:%1:%2:%3:%4" ).arg( vl->id(),
QString::number( static_cast< int >( aggregate ) ),
subExpression,
parameters.filter );
if ( context && context->hasCachedValue( cacheKey ) )
return context->cachedValue( cacheKey );
QVariant result;
ok = false;
QgsExpressionContext subContext( *context );
result = childLayer->aggregate( aggregate, subExpression, parameters, &subContext, &ok );
if ( !ok )
{
parent->setEvalErrorString( QObject::tr( "Could not calculate aggregate for: %1" ).arg( subExpression ) );
return QVariant();
}
// cache value
if ( context )
context->setCachedValue( cacheKey, result );
return result;
}
static QVariant fcnAggregateGeneric( QgsAggregateCalculator::Aggregate aggregate, const QVariantList &values, QgsAggregateCalculator::AggregateParameters parameters, const QgsExpressionContext *context, QgsExpression *parent )
{
if ( !context )
{
parent->setEvalErrorString( QObject::tr( "Cannot use aggregate function in this context" ) );
return QVariant();
}
// first step - find current layer
QgsVectorLayer *vl = QgsExpressionUtils::getVectorLayer( context->variable( QStringLiteral( "layer" ) ), parent );
if ( !vl )
{
parent->setEvalErrorString( QObject::tr( "Cannot use aggregate function in this context" ) );
return QVariant();
}
//lazy eval, so we need to evaluate nodes now
//first node is subexpression (or field name)
QgsExpressionNode *node = QgsExpressionUtils::getNode( values.at( 0 ), parent );
ENSURE_NO_EVAL_ERROR;
QString subExpression = node->dump();
//optional second node is group by
QString groupBy;
if ( values.count() > 1 )
{
node = QgsExpressionUtils::getNode( values.at( 1 ), parent );
ENSURE_NO_EVAL_ERROR;
QgsExpressionNodeLiteral *nl = dynamic_cast< QgsExpressionNodeLiteral * >( node );
if ( !nl || nl->value().isValid() )
groupBy = node->dump();
}
//optional third node is filter
if ( values.count() > 2 )
{
node = QgsExpressionUtils::getNode( values.at( 2 ), parent );
ENSURE_NO_EVAL_ERROR;
QgsExpressionNodeLiteral *nl = dynamic_cast< QgsExpressionNodeLiteral * >( node );
if ( !nl || nl->value().isValid() )
parameters.filter = node->dump();
}
// build up filter with group by
// find current group by value
if ( !groupBy.isEmpty() )
{
QgsExpression groupByExp( groupBy );
QVariant groupByValue = groupByExp.evaluate( context );
QString groupByClause = QStringLiteral( "%1 %2 %3" ).arg( groupBy,
groupByValue.isNull() ? QStringLiteral( "is" ) : QStringLiteral( "=" ),
QgsExpression::quotedValue( groupByValue ) );
if ( !parameters.filter.isEmpty() )
parameters.filter = QStringLiteral( "(%1) AND (%2)" ).arg( parameters.filter, groupByClause );
else
parameters.filter = groupByClause;
}
QString cacheKey = QStringLiteral( "agg:%1:%2:%3:%4" ).arg( vl->id(),
QString::number( static_cast< int >( aggregate ) ),
subExpression,
parameters.filter );
if ( context && context->hasCachedValue( cacheKey ) )
return context->cachedValue( cacheKey );
QVariant result;
bool ok = false;
QgsExpressionContext subContext( *context );
result = vl->aggregate( aggregate, subExpression, parameters, &subContext, &ok );
if ( !ok )
{
parent->setEvalErrorString( QObject::tr( "Could not calculate aggregate for: %1" ).arg( subExpression ) );
return QVariant();
}
// cache value
if ( context )
context->setCachedValue( cacheKey, result );
return result;
}
static QVariant fcnAggregateCount( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return fcnAggregateGeneric( QgsAggregateCalculator::Count, values, QgsAggregateCalculator::AggregateParameters(), context, parent );
}
static QVariant fcnAggregateCountDistinct( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return fcnAggregateGeneric( QgsAggregateCalculator::CountDistinct, values, QgsAggregateCalculator::AggregateParameters(), context, parent );
}
static QVariant fcnAggregateCountMissing( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return fcnAggregateGeneric( QgsAggregateCalculator::CountMissing, values, QgsAggregateCalculator::AggregateParameters(), context, parent );
}
static QVariant fcnAggregateMin( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return fcnAggregateGeneric( QgsAggregateCalculator::Min, values, QgsAggregateCalculator::AggregateParameters(), context, parent );
}
static QVariant fcnAggregateMax( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return fcnAggregateGeneric( QgsAggregateCalculator::Max, values, QgsAggregateCalculator::AggregateParameters(), context, parent );
}
static QVariant fcnAggregateSum( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return fcnAggregateGeneric( QgsAggregateCalculator::Sum, values, QgsAggregateCalculator::AggregateParameters(), context, parent );
}
static QVariant fcnAggregateMean( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return fcnAggregateGeneric( QgsAggregateCalculator::Mean, values, QgsAggregateCalculator::AggregateParameters(), context, parent );
}
static QVariant fcnAggregateMedian( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return fcnAggregateGeneric( QgsAggregateCalculator::Median, values, QgsAggregateCalculator::AggregateParameters(), context, parent );
}
static QVariant fcnAggregateStdev( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return fcnAggregateGeneric( QgsAggregateCalculator::StDevSample, values, QgsAggregateCalculator::AggregateParameters(), context, parent );
}
static QVariant fcnAggregateRange( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return fcnAggregateGeneric( QgsAggregateCalculator::Range, values, QgsAggregateCalculator::AggregateParameters(), context, parent );
}
static QVariant fcnAggregateMinority( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return fcnAggregateGeneric( QgsAggregateCalculator::Minority, values, QgsAggregateCalculator::AggregateParameters(), context, parent );
}
static QVariant fcnAggregateMajority( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return fcnAggregateGeneric( QgsAggregateCalculator::Majority, values, QgsAggregateCalculator::AggregateParameters(), context, parent );
}
static QVariant fcnAggregateQ1( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return fcnAggregateGeneric( QgsAggregateCalculator::FirstQuartile, values, QgsAggregateCalculator::AggregateParameters(), context, parent );
}
static QVariant fcnAggregateQ3( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return fcnAggregateGeneric( QgsAggregateCalculator::ThirdQuartile, values, QgsAggregateCalculator::AggregateParameters(), context, parent );
}
static QVariant fcnAggregateIQR( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return fcnAggregateGeneric( QgsAggregateCalculator::InterQuartileRange, values, QgsAggregateCalculator::AggregateParameters(), context, parent );
}
static QVariant fcnAggregateMinLength( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return fcnAggregateGeneric( QgsAggregateCalculator::StringMinimumLength, values, QgsAggregateCalculator::AggregateParameters(), context, parent );
}
static QVariant fcnAggregateMaxLength( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return fcnAggregateGeneric( QgsAggregateCalculator::StringMaximumLength, values, QgsAggregateCalculator::AggregateParameters(), context, parent );
}
static QVariant fcnAggregateCollectGeometry( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return fcnAggregateGeneric( QgsAggregateCalculator::GeometryCollect, values, QgsAggregateCalculator::AggregateParameters(), context, parent );
}
static QVariant fcnAggregateStringConcat( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsAggregateCalculator::AggregateParameters parameters;
//fourth node is concatenator
if ( values.count() > 3 )
{
QgsExpressionNode *node = QgsExpressionUtils::getNode( values.at( 3 ), parent );
ENSURE_NO_EVAL_ERROR;
QVariant value = node->eval( parent, context );
ENSURE_NO_EVAL_ERROR;
parameters.delimiter = value.toString();
}
return fcnAggregateGeneric( QgsAggregateCalculator::StringConcatenate, values, parameters, context, parent );
}
static QVariant fcnAggregateArray( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return fcnAggregateGeneric( QgsAggregateCalculator::ArrayAggregate, values, QgsAggregateCalculator::AggregateParameters(), context, parent );
}
static QVariant fcnClamp( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double minValue = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
double testValue = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
double maxValue = QgsExpressionUtils::getDoubleValue( values.at( 2 ), parent );
// force testValue to sit inside the range specified by the min and max value
if ( testValue <= minValue )
{
return QVariant( minValue );
}
else if ( testValue >= maxValue )
{
return QVariant( maxValue );
}
else
{
return QVariant( testValue );
}
}
static QVariant fcnFloor( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double x = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
return QVariant( std::floor( x ) );
}
static QVariant fcnCeil( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double x = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
return QVariant( std::ceil( x ) );
}
static QVariant fcnToInt( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return QVariant( QgsExpressionUtils::getIntValue( values.at( 0 ), parent ) );
}
static QVariant fcnToReal( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return QVariant( QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent ) );
}
static QVariant fcnToString( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return QVariant( QgsExpressionUtils::getStringValue( values.at( 0 ), parent ) );
}
static QVariant fcnToDateTime( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return QVariant( QgsExpressionUtils::getDateTimeValue( values.at( 0 ), parent ) );
}
static QVariant fcnCoalesce( const QVariantList &values, const QgsExpressionContext *, QgsExpression *, const QgsExpressionNodeFunction * )
{
for ( const QVariant &value : values )
{
if ( value.isNull() )
continue;
return value;
}
return QVariant();
}
static QVariant fcnLower( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QString str = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
return QVariant( str.toLower() );
}
static QVariant fcnUpper( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QString str = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
return QVariant( str.toUpper() );
}
static QVariant fcnTitle( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QString str = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
QStringList elems = str.split( ' ' );
for ( int i = 0; i < elems.size(); i++ )
{
if ( elems[i].size() > 1 )
elems[i] = elems[i].at( 0 ).toUpper() + elems[i].mid( 1 ).toLower();
}
return QVariant( elems.join( QStringLiteral( " " ) ) );
}
static QVariant fcnTrim( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QString str = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
return QVariant( str.trimmed() );
}
static QVariant fcnLevenshtein( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QString string1 = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
QString string2 = QgsExpressionUtils::getStringValue( values.at( 1 ), parent );
return QVariant( QgsStringUtils::levenshteinDistance( string1, string2, true ) );
}
static QVariant fcnLCS( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QString string1 = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
QString string2 = QgsExpressionUtils::getStringValue( values.at( 1 ), parent );
return QVariant( QgsStringUtils::longestCommonSubstring( string1, string2, true ) );
}
static QVariant fcnHamming( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QString string1 = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
QString string2 = QgsExpressionUtils::getStringValue( values.at( 1 ), parent );
int dist = QgsStringUtils::hammingDistance( string1, string2 );
return ( dist < 0 ? QVariant() : QVariant( QgsStringUtils::hammingDistance( string1, string2, true ) ) );
}
static QVariant fcnSoundex( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QString string = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
return QVariant( QgsStringUtils::soundex( string ) );
}
static QVariant fcnChar( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QChar character = QChar( QgsExpressionUtils::getNativeIntValue( values.at( 0 ), parent ) );
return QVariant( QString( character ) );
}
static QVariant fcnWordwrap( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
if ( values.length() == 2 || values.length() == 3 )
{
QString str = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
qlonglong wrap = QgsExpressionUtils::getIntValue( values.at( 1 ), parent );
if ( !str.isEmpty() && wrap != 0 )
{
QString newstr;
QRegExp rx;
QString customdelimiter = QgsExpressionUtils::getStringValue( values.at( 2 ), parent );
int delimiterlength;
if ( customdelimiter.length() > 0 )
{
rx.setPatternSyntax( QRegExp::FixedString );
rx.setPattern( customdelimiter );
delimiterlength = customdelimiter.length();
}
else
{
// \x200B is a ZERO-WIDTH SPACE, needed for worwrap to support a number of complex scripts (Indic, Arabic, etc.)
rx.setPattern( QStringLiteral( "[\\s\\x200B]" ) );
delimiterlength = 1;
}
QStringList lines = str.split( '\n' );
int strlength, strcurrent, strhit, lasthit;
for ( int i = 0; i < lines.size(); i++ )
{
strlength = lines[i].length();
strcurrent = 0;
strhit = 0;
lasthit = 0;
while ( strcurrent < strlength )
{
// positive wrap value = desired maximum line width to wrap
// negative wrap value = desired minimum line width before wrap
if ( wrap > 0 )
{
//first try to locate delimiter backwards
strhit = lines[i].lastIndexOf( rx, strcurrent + wrap );
if ( strhit == lasthit || strhit == -1 )
{
//if no new backward delimiter found, try to locate forward
strhit = lines[i].indexOf( rx, strcurrent + std::labs( wrap ) );
}
lasthit = strhit;
}
else
{
strhit = lines[i].indexOf( rx, strcurrent + std::labs( wrap ) );
}
if ( strhit > -1 )
{
newstr.append( lines[i].midRef( strcurrent, strhit - strcurrent ) );
newstr.append( '\n' );
strcurrent = strhit + delimiterlength;
}
else
{
newstr.append( lines[i].midRef( strcurrent ) );
strcurrent = strlength;
}
}
if ( i < lines.size() - 1 ) newstr.append( '\n' );
}
return QVariant( newstr );
}
}
return QVariant();
}
static QVariant fcnLength( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
// two variants, one for geometry, one for string
if ( values.at( 0 ).canConvert<QgsGeometry>() )
{
//geometry variant
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.type() != QgsWkbTypes::LineGeometry )
return QVariant();
return QVariant( geom.length() );
}
//otherwise fall back to string variant
QString str = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
return QVariant( str.length() );
}
static QVariant fcnReplace( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
if ( values.count() == 2 && values.at( 1 ).type() == QVariant::Map )
{
QString str = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
QVariantMap map = QgsExpressionUtils::getMapValue( values.at( 1 ), parent );
for ( QVariantMap::const_iterator it = map.constBegin(); it != map.constEnd(); ++it )
{
str = str.replace( it.key(), it.value().toString() );
}
return QVariant( str );
}
else if ( values.count() == 3 )
{
QString str = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
QVariantList before;
QVariantList after;
bool isSingleReplacement = false;
if ( values.at( 1 ).type() != QVariant::List && values.at( 2 ).type() != QVariant::StringList )
{
before = QVariantList() << QgsExpressionUtils::getStringValue( values.at( 1 ), parent );
}
else
{
before = QgsExpressionUtils::getListValue( values.at( 1 ), parent );
}
if ( values.at( 2 ).type() != QVariant::List && values.at( 2 ).type() != QVariant::StringList )
{
after = QVariantList() << QgsExpressionUtils::getStringValue( values.at( 2 ), parent );
isSingleReplacement = true;
}
else
{
after = QgsExpressionUtils::getListValue( values.at( 2 ), parent );
}
if ( !isSingleReplacement && before.length() != after.length() )
{
parent->setEvalErrorString( QObject::tr( "Invalid pair of array, length not identical" ) );
return QVariant();
}
for ( int i = 0; i < before.length(); i++ )
{
str = str.replace( before.at( i ).toString(), after.at( isSingleReplacement ? 0 : i ).toString() );
}
return QVariant( str );
}
else
{
parent->setEvalErrorString( QObject::tr( "Function replace requires 2 or 3 arguments" ) );
return QVariant();
}
}
static QVariant fcnRegexpReplace( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QString str = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
QString regexp = QgsExpressionUtils::getStringValue( values.at( 1 ), parent );
QString after = QgsExpressionUtils::getStringValue( values.at( 2 ), parent );
QRegularExpression re( regexp );
if ( !re.isValid() )
{
parent->setEvalErrorString( QObject::tr( "Invalid regular expression '%1': %2" ).arg( regexp, re.errorString() ) );
return QVariant();
}
return QVariant( str.replace( re, after ) );
}
static QVariant fcnRegexpMatch( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QString str = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
QString regexp = QgsExpressionUtils::getStringValue( values.at( 1 ), parent );
QRegularExpression re( regexp );
if ( !re.isValid() )
{
parent->setEvalErrorString( QObject::tr( "Invalid regular expression '%1': %2" ).arg( regexp, re.errorString() ) );
return QVariant();
}
return QVariant( ( str.indexOf( re ) + 1 ) );
}
static QVariant fcnRegexpMatches( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QString str = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
QString regexp = QgsExpressionUtils::getStringValue( values.at( 1 ), parent );
QString empty = QgsExpressionUtils::getStringValue( values.at( 2 ), parent );
QRegularExpression re( regexp );
if ( !re.isValid() )
{
parent->setEvalErrorString( QObject::tr( "Invalid regular expression '%1': %2" ).arg( regexp, re.errorString() ) );
return QVariant();
}
QRegularExpressionMatch matches = re.match( str );
if ( matches.hasMatch() )
{
QVariantList array;
QStringList list = matches.capturedTexts();
// Skip the first string to only return captured groups
for ( QStringList::const_iterator it = ++list.constBegin(); it != list.constEnd(); ++it )
{
array += ( !( *it ).isEmpty() ) ? *it : empty;
}
return QVariant( array );
}
else
{
return QVariant();
}
}
static QVariant fcnRegexpSubstr( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QString str = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
QString regexp = QgsExpressionUtils::getStringValue( values.at( 1 ), parent );
QRegularExpression re( regexp );
if ( !re.isValid() )
{
parent->setEvalErrorString( QObject::tr( "Invalid regular expression '%1': %2" ).arg( regexp, re.errorString() ) );
return QVariant();
}
// extract substring
QRegularExpressionMatch match = re.match( str );
if ( match.hasMatch() )
{
// return first capture
if ( match.lastCapturedIndex() > 0 )
{
// a capture group was present, so use that
return QVariant( match.captured( 1 ) );
}
else
{
// no capture group, so using all match
return QVariant( match.captured( 0 ) );
}
}
else
{
return QVariant( "" );
}
}
static QVariant fcnUuid( const QVariantList &, const QgsExpressionContext *, QgsExpression *, const QgsExpressionNodeFunction * )
{
return QUuid::createUuid().toString();
}
static QVariant fcnSubstr( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
if ( !values.at( 0 ).isValid() || !values.at( 1 ).isValid() )
return QVariant();
QString str = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
qlonglong from = QgsExpressionUtils::getIntValue( values.at( 1 ), parent );
qlonglong len = 0;
if ( values.at( 2 ).isValid() )
len = QgsExpressionUtils::getIntValue( values.at( 2 ), parent );
else
len = str.size();
if ( from < 0 )
{
from = str.size() + from;
if ( from < 0 )
{
from = 0;
}
}
else if ( from > 0 )
{
//account for the fact that substr() starts at 1
from -= 1;
}
if ( len < 0 )
{
len = str.size() + len - from;
if ( len < 0 )
{
len = 0;
}
}
return QVariant( str.mid( from, len ) );
}
static QVariant fcnFeatureId( const QVariantList &, const QgsExpressionContext *context, QgsExpression *, const QgsExpressionNodeFunction * )
{
FEAT_FROM_CONTEXT( context, f );
// TODO: handling of 64-bit feature ids?
return QVariant( static_cast< int >( f.id() ) );
}
static QVariant fcnRasterValue( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsRasterLayer *layer = QgsExpressionUtils::getRasterLayer( values.at( 0 ), parent );
if ( !layer || !layer->dataProvider() )
{
parent->setEvalErrorString( QObject::tr( "Function `raster_value` requires a valid raster layer." ) );
return QVariant();
}
int bandNb = QgsExpressionUtils::getIntValue( values.at( 1 ), parent );
if ( bandNb < 1 || bandNb > layer->bandCount() )
{
parent->setEvalErrorString( QObject::tr( "Function `raster_value` requires a valid raster band number." ) );
return QVariant();
}
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 2 ), parent );
if ( geom.isNull() || geom.type() != QgsWkbTypes::PointGeometry )
{
parent->setEvalErrorString( QObject::tr( "Function `raster_value` requires a valid point geometry." ) );
return QVariant();
}
QgsPointXY point = geom.asPoint();
if ( geom.isMultipart() )
{
QgsMultiPointXY multiPoint = geom.asMultiPoint();
if ( multiPoint.count() == 1 )
{
point = multiPoint[0];
}
else
{
// if the geometry contains more than one part, return an undefined value
return QVariant();
}
}
double value = layer->dataProvider()->sample( point, bandNb );
return std::isnan( value ) ? QVariant() : value;
}
static QVariant fcnFeature( const QVariantList &, const QgsExpressionContext *context, QgsExpression *, const QgsExpressionNodeFunction * )
{
if ( !context )
return QVariant();
return context->feature();
}
static QVariant fcnAttribute( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsFeature feat = QgsExpressionUtils::getFeature( values.at( 0 ), parent );
QString attr = QgsExpressionUtils::getStringValue( values.at( 1 ), parent );
return feat.attribute( attr );
}
static QVariant fcnIsSelected( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsVectorLayer *layer = nullptr;
QgsFeature feature;
if ( values.isEmpty() )
{
feature = context->feature();
layer = QgsExpressionUtils::getVectorLayer( context->variable( QStringLiteral( "layer" ) ), parent );
}
else if ( values.size() == 1 )
{
layer = QgsExpressionUtils::getVectorLayer( context->variable( QStringLiteral( "layer" ) ), parent );
feature = QgsExpressionUtils::getFeature( values.at( 0 ), parent );
}
else if ( values.size() == 2 )
{
layer = QgsExpressionUtils::getVectorLayer( values.at( 0 ), parent );
feature = QgsExpressionUtils::getFeature( values.at( 1 ), parent );
}
else
{
parent->setEvalErrorString( QObject::tr( "Function `is_selected` requires no more than two parameters. %1 given." ).arg( values.length() ) );
return QVariant();
}
if ( !layer || !feature.isValid() )
{
return QVariant( QVariant::Bool );
}
return layer->selectedFeatureIds().contains( feature.id() );
}
static QVariant fcnNumSelected( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsVectorLayer *layer = nullptr;
if ( values.isEmpty() )
layer = QgsExpressionUtils::getVectorLayer( context->variable( QStringLiteral( "layer" ) ), parent );
else if ( values.count() == 1 )
layer = QgsExpressionUtils::getVectorLayer( values.at( 0 ), parent );
else
{
parent->setEvalErrorString( QObject::tr( "Function `num_selected` requires no more than one parameter. %1 given." ).arg( values.length() ) );
return QVariant();
}
if ( !layer )
{
return QVariant( QVariant::LongLong );
}
return layer->selectedFeatureCount();
}
static QVariant fcnConcat( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QString concat;
for ( const QVariant &value : values )
{
concat += QgsExpressionUtils::getStringValue( value, parent );
}
return concat;
}
static QVariant fcnStrpos( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QString string = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
return string.indexOf( QgsExpressionUtils::getStringValue( values.at( 1 ), parent ) ) + 1;
}
static QVariant fcnRight( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QString string = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
qlonglong pos = QgsExpressionUtils::getIntValue( values.at( 1 ), parent );
return string.right( pos );
}
static QVariant fcnLeft( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QString string = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
qlonglong pos = QgsExpressionUtils::getIntValue( values.at( 1 ), parent );
return string.left( pos );
}
static QVariant fcnRPad( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QString string = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
qlonglong length = QgsExpressionUtils::getIntValue( values.at( 1 ), parent );
QString fill = QgsExpressionUtils::getStringValue( values.at( 2 ), parent );
return string.leftJustified( length, fill.at( 0 ), true );
}
static QVariant fcnLPad( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QString string = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
qlonglong length = QgsExpressionUtils::getIntValue( values.at( 1 ), parent );
QString fill = QgsExpressionUtils::getStringValue( values.at( 2 ), parent );
return string.rightJustified( length, fill.at( 0 ), true );
}
static QVariant fcnFormatString( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QString string = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
for ( int n = 1; n < values.length(); n++ )
{
string = string.arg( QgsExpressionUtils::getStringValue( values.at( n ), parent ) );
}
return string;
}
static QVariant fcnNow( const QVariantList &, const QgsExpressionContext *, QgsExpression *, const QgsExpressionNodeFunction * )
{
return QVariant( QDateTime::currentDateTime() );
}
static QVariant fcnToDate( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return QVariant( QgsExpressionUtils::getDateValue( values.at( 0 ), parent ) );
}
static QVariant fcnToTime( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return QVariant( QgsExpressionUtils::getTimeValue( values.at( 0 ), parent ) );
}
static QVariant fcnToInterval( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return QVariant::fromValue( QgsExpressionUtils::getInterval( values.at( 0 ), parent ) );
}
static QVariant fcnAge( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QDateTime d1 = QgsExpressionUtils::getDateTimeValue( values.at( 0 ), parent );
QDateTime d2 = QgsExpressionUtils::getDateTimeValue( values.at( 1 ), parent );
qint64 seconds = d2.secsTo( d1 );
return QVariant::fromValue( QgsInterval( seconds ) );
}
static QVariant fcnDayOfWeek( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
if ( !values.at( 0 ).canConvert<QDate>() )
return QVariant();
QDate date = QgsExpressionUtils::getDateValue( values.at( 0 ), parent );
if ( !date.isValid() )
return QVariant();
// return dayOfWeek() % 7 so that values range from 0 (sun) to 6 (sat)
// (to match PostgreSQL behavior)
return date.dayOfWeek() % 7;
}
static QVariant fcnDay( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariant value = values.at( 0 );
QgsInterval inter = QgsExpressionUtils::getInterval( value, parent, false );
if ( inter.isValid() )
{
return QVariant( inter.days() );
}
else
{
QDateTime d1 = QgsExpressionUtils::getDateTimeValue( value, parent );
return QVariant( d1.date().day() );
}
}
static QVariant fcnYear( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariant value = values.at( 0 );
QgsInterval inter = QgsExpressionUtils::getInterval( value, parent, false );
if ( inter.isValid() )
{
return QVariant( inter.years() );
}
else
{
QDateTime d1 = QgsExpressionUtils::getDateTimeValue( value, parent );
return QVariant( d1.date().year() );
}
}
static QVariant fcnMonth( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariant value = values.at( 0 );
QgsInterval inter = QgsExpressionUtils::getInterval( value, parent, false );
if ( inter.isValid() )
{
return QVariant( inter.months() );
}
else
{
QDateTime d1 = QgsExpressionUtils::getDateTimeValue( value, parent );
return QVariant( d1.date().month() );
}
}
static QVariant fcnWeek( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariant value = values.at( 0 );
QgsInterval inter = QgsExpressionUtils::getInterval( value, parent, false );
if ( inter.isValid() )
{
return QVariant( inter.weeks() );
}
else
{
QDateTime d1 = QgsExpressionUtils::getDateTimeValue( value, parent );
return QVariant( d1.date().weekNumber() );
}
}
static QVariant fcnHour( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariant value = values.at( 0 );
QgsInterval inter = QgsExpressionUtils::getInterval( value, parent, false );
if ( inter.isValid() )
{
return QVariant( inter.hours() );
}
else
{
QTime t1 = QgsExpressionUtils::getTimeValue( value, parent );
return QVariant( t1.hour() );
}
}
static QVariant fcnMinute( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariant value = values.at( 0 );
QgsInterval inter = QgsExpressionUtils::getInterval( value, parent, false );
if ( inter.isValid() )
{
return QVariant( inter.minutes() );
}
else
{
QTime t1 = QgsExpressionUtils::getTimeValue( value, parent );
return QVariant( t1.minute() );
}
}
static QVariant fcnSeconds( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariant value = values.at( 0 );
QgsInterval inter = QgsExpressionUtils::getInterval( value, parent, false );
if ( inter.isValid() )
{
return QVariant( inter.seconds() );
}
else
{
QTime t1 = QgsExpressionUtils::getTimeValue( value, parent );
return QVariant( t1.second() );
}
}
static QVariant fcnEpoch( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QDateTime dt = QgsExpressionUtils::getDateTimeValue( values.at( 0 ), parent );
if ( dt.isValid() )
{
return QVariant( dt.toMSecsSinceEpoch() );
}
else
{
return QVariant();
}
}
#define ENSURE_GEOM_TYPE(f, g, geomtype) \
if ( !(f).hasGeometry() ) \
return QVariant(); \
QgsGeometry g = (f).geometry(); \
if ( (g).type() != (geomtype) ) \
return QVariant();
static QVariant fcnX( const QVariantList &, const QgsExpressionContext *context, QgsExpression *, const QgsExpressionNodeFunction * )
{
FEAT_FROM_CONTEXT( context, f );
ENSURE_GEOM_TYPE( f, g, QgsWkbTypes::PointGeometry );
if ( g.isMultipart() )
{
return g.asMultiPoint().at( 0 ).x();
}
else
{
return g.asPoint().x();
}
}
static QVariant fcnY( const QVariantList &, const QgsExpressionContext *context, QgsExpression *, const QgsExpressionNodeFunction * )
{
FEAT_FROM_CONTEXT( context, f );
ENSURE_GEOM_TYPE( f, g, QgsWkbTypes::PointGeometry );
if ( g.isMultipart() )
{
return g.asMultiPoint().at( 0 ).y();
}
else
{
return g.asPoint().y();
}
}
static QVariant fcnGeomX( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.isNull() )
return QVariant();
//if single point, return the point's x coordinate
if ( geom.type() == QgsWkbTypes::PointGeometry && !geom.isMultipart() )
{
return geom.asPoint().x();
}
//otherwise return centroid x
QgsGeometry centroid = geom.centroid();
QVariant result( centroid.asPoint().x() );
return result;
}
static QVariant fcnGeomY( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.isNull() )
return QVariant();
//if single point, return the point's y coordinate
if ( geom.type() == QgsWkbTypes::PointGeometry && !geom.isMultipart() )
{
return geom.asPoint().y();
}
//otherwise return centroid y
QgsGeometry centroid = geom.centroid();
QVariant result( centroid.asPoint().y() );
return result;
}
static QVariant fcnGeomZ( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.isNull() )
return QVariant(); //or 0?
//if single point, return the point's z coordinate
if ( geom.type() == QgsWkbTypes::PointGeometry && !geom.isMultipart() )
{
const QgsPoint *point = qgsgeometry_cast< const QgsPoint * >( geom.constGet() );
if ( point )
return point->z();
}
return QVariant();
}
static QVariant fcnGeomM( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.isNull() )
return QVariant(); //or 0?
//if single point, return the point's m value
if ( geom.type() == QgsWkbTypes::PointGeometry && !geom.isMultipart() )
{
const QgsPoint *point = qgsgeometry_cast< const QgsPoint * >( geom.constGet() );
if ( point )
return point->m();
}
return QVariant();
}
static QVariant fcnPointN( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.isNull() )
return QVariant();
//idx is 1 based
qlonglong idx = QgsExpressionUtils::getIntValue( values.at( 1 ), parent ) - 1;
QgsVertexId vId;
if ( idx < 0 || !geom.vertexIdFromVertexNr( idx, vId ) )
{
parent->setEvalErrorString( QObject::tr( "Point index is out of range" ) );
return QVariant();
}
QgsPoint point = geom.constGet()->vertexAt( vId );
return QVariant::fromValue( QgsGeometry( new QgsPoint( point ) ) );
}
static QVariant fcnStartPoint( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.isNull() )
return QVariant();
QgsVertexId vId;
if ( !geom.vertexIdFromVertexNr( 0, vId ) )
{
return QVariant();
}
QgsPoint point = geom.constGet()->vertexAt( vId );
return QVariant::fromValue( QgsGeometry( new QgsPoint( point ) ) );
}
static QVariant fcnEndPoint( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.isNull() )
return QVariant();
QgsVertexId vId;
if ( !geom.vertexIdFromVertexNr( geom.constGet()->nCoordinates() - 1, vId ) )
{
return QVariant();
}
QgsPoint point = geom.constGet()->vertexAt( vId );
return QVariant::fromValue( QgsGeometry( new QgsPoint( point ) ) );
}
static QVariant fcnNodesToPoints( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.isNull() )
return QVariant();
bool ignoreClosing = false;
if ( values.length() > 1 )
{
ignoreClosing = QgsExpressionUtils::getIntValue( values.at( 1 ), parent );
}
QgsMultiPoint *mp = new QgsMultiPoint();
const QgsCoordinateSequence sequence = geom.constGet()->coordinateSequence();
for ( const QgsRingSequence &part : sequence )
{
for ( const QgsPointSequence &ring : part )
{
bool skipLast = false;
if ( ignoreClosing && ring.count() > 2 && ring.first() == ring.last() )
{
skipLast = true;
}
for ( int i = 0; i < ( skipLast ? ring.count() - 1 : ring.count() ); ++ i )
{
mp->addGeometry( ring.at( i ).clone() );
}
}
}
return QVariant::fromValue( QgsGeometry( mp ) );
}
static QVariant fcnSegmentsToLines( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.isNull() )
return QVariant();
const QVector< QgsLineString * > linesToProcess = QgsGeometryUtils::extractLineStrings( geom.constGet() );
//OK, now we have a complete list of segmentized lines from the geometry
QgsMultiLineString *ml = new QgsMultiLineString();
for ( QgsLineString *line : linesToProcess )
{
for ( int i = 0; i < line->numPoints() - 1; ++i )
{
QgsLineString *segment = new QgsLineString();
segment->setPoints( QgsPointSequence()
<< line->pointN( i )
<< line->pointN( i + 1 ) );
ml->addGeometry( segment );
}
delete line;
}
return QVariant::fromValue( QgsGeometry( ml ) );
}
static QVariant fcnInteriorRingN( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.isNull() )
return QVariant();
const QgsCurvePolygon *curvePolygon = qgsgeometry_cast< const QgsCurvePolygon * >( geom.constGet() );
if ( !curvePolygon )
return QVariant();
//idx is 1 based
qlonglong idx = QgsExpressionUtils::getIntValue( values.at( 1 ), parent ) - 1;
if ( idx >= curvePolygon->numInteriorRings() || idx < 0 )
return QVariant();
QgsCurve *curve = static_cast< QgsCurve * >( curvePolygon->interiorRing( idx )->clone() );
QVariant result = curve ? QVariant::fromValue( QgsGeometry( curve ) ) : QVariant();
return result;
}
static QVariant fcnGeometryN( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.isNull() )
return QVariant();
const QgsGeometryCollection *collection = qgsgeometry_cast< const QgsGeometryCollection * >( geom.constGet() );
if ( !collection )
return QVariant();
//idx is 1 based
qlonglong idx = QgsExpressionUtils::getIntValue( values.at( 1 ), parent ) - 1;
if ( idx < 0 || idx >= collection->numGeometries() )
return QVariant();
QgsAbstractGeometry *part = collection->geometryN( idx )->clone();
QVariant result = part ? QVariant::fromValue( QgsGeometry( part ) ) : QVariant();
return result;
}
static QVariant fcnBoundary( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.isNull() )
return QVariant();
QgsAbstractGeometry *boundary = geom.constGet()->boundary();
if ( !boundary )
return QVariant();
return QVariant::fromValue( QgsGeometry( boundary ) );
}
static QVariant fcnLineMerge( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.isNull() )
return QVariant();
QgsGeometry merged = geom.mergeLines();
if ( merged.isNull() )
return QVariant();
return QVariant::fromValue( merged );
}
static QVariant fcnSimplify( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.isNull() )
return QVariant();
double tolerance = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
QgsGeometry simplified = geom.simplify( tolerance );
if ( simplified.isNull() )
return QVariant();
return simplified;
}
static QVariant fcnSimplifyVW( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.isNull() )
return QVariant();
double tolerance = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
QgsMapToPixelSimplifier simplifier( QgsMapToPixelSimplifier::SimplifyGeometry, tolerance, QgsMapToPixelSimplifier::Visvalingam );
QgsGeometry simplified = simplifier.simplify( geom );
if ( simplified.isNull() )
return QVariant();
return simplified;
}
static QVariant fcnSmooth( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.isNull() )
return QVariant();
int iterations = std::min( QgsExpressionUtils::getNativeIntValue( values.at( 1 ), parent ), 10 );
double offset = qBound( 0.0, QgsExpressionUtils::getDoubleValue( values.at( 2 ), parent ), 0.5 );
double minLength = QgsExpressionUtils::getDoubleValue( values.at( 3 ), parent );
double maxAngle = qBound( 0.0, QgsExpressionUtils::getDoubleValue( values.at( 4 ), parent ), 180.0 );
QgsGeometry smoothed = geom.smooth( iterations, offset, minLength, maxAngle );
if ( smoothed.isNull() )
return QVariant();
return smoothed;
}
static QVariant fcnMakePoint( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
if ( values.count() < 2 || values.count() > 4 )
{
parent->setEvalErrorString( QObject::tr( "Function make_point requires 2-4 arguments" ) );
return QVariant();
}
double x = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
double y = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
double z = values.count() >= 3 ? QgsExpressionUtils::getDoubleValue( values.at( 2 ), parent ) : 0.0;
double m = values.count() >= 4 ? QgsExpressionUtils::getDoubleValue( values.at( 3 ), parent ) : 0.0;
switch ( values.count() )
{
case 2:
return QVariant::fromValue( QgsGeometry( new QgsPoint( x, y ) ) );
case 3:
return QVariant::fromValue( QgsGeometry( new QgsPoint( QgsWkbTypes::PointZ, x, y, z ) ) );
case 4:
return QVariant::fromValue( QgsGeometry( new QgsPoint( QgsWkbTypes::PointZM, x, y, z, m ) ) );
}
return QVariant(); //avoid warning
}
static QVariant fcnMakePointM( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double x = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
double y = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
double m = QgsExpressionUtils::getDoubleValue( values.at( 2 ), parent );
return QVariant::fromValue( QgsGeometry( new QgsPoint( QgsWkbTypes::PointM, x, y, 0.0, m ) ) );
}
static QVariant fcnMakeLine( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
if ( values.count() < 2 )
{
return QVariant();
}
QgsLineString *lineString = new QgsLineString();
lineString->clear();
for ( const QVariant &value : values )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( value, parent );
if ( geom.isNull() )
continue;
if ( geom.type() != QgsWkbTypes::PointGeometry || geom.isMultipart() )
continue;
const QgsPoint *point = qgsgeometry_cast< const QgsPoint * >( geom.constGet() );
if ( !point )
continue;
lineString->addVertex( *point );
}
return QVariant::fromValue( QgsGeometry( lineString ) );
}
static QVariant fcnMakePolygon( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
if ( values.count() < 1 )
{
parent->setEvalErrorString( QObject::tr( "Function make_polygon requires an argument" ) );
return QVariant();
}
QgsGeometry outerRing = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( outerRing.type() != QgsWkbTypes::LineGeometry || outerRing.isMultipart() || outerRing.isNull() )
return QVariant();
QgsPolygon *polygon = new QgsPolygon();
polygon->setExteriorRing( qgsgeometry_cast< QgsCurve * >( outerRing.constGet()->clone() ) );
for ( int i = 1; i < values.count(); ++i )
{
QgsGeometry ringGeom = QgsExpressionUtils::getGeometry( values.at( i ), parent );
if ( ringGeom.isNull() )
continue;
if ( ringGeom.type() != QgsWkbTypes::LineGeometry || ringGeom.isMultipart() || ringGeom.isNull() )
continue;
polygon->addInteriorRing( qgsgeometry_cast< QgsCurve * >( ringGeom.constGet()->clone() ) );
}
return QVariant::fromValue( QgsGeometry( polygon ) );
}
static QVariant fcnMakeTriangle( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
std::unique_ptr<QgsTriangle> tr( new QgsTriangle() );
std::unique_ptr<QgsLineString> lineString( new QgsLineString() );
lineString->clear();
for ( const QVariant &value : values )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( value, parent );
if ( geom.isNull() )
return QVariant();
if ( geom.type() != QgsWkbTypes::PointGeometry || geom.isMultipart() )
return QVariant();
const QgsPoint *point = qgsgeometry_cast< const QgsPoint * >( geom.constGet() );
if ( !point )
return QVariant();
lineString->addVertex( *point );
}
tr->setExteriorRing( lineString.release() );
return QVariant::fromValue( QgsGeometry( tr.release() ) );
}
static QVariant fcnMakeCircle( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.isNull() )
return QVariant();
if ( geom.type() != QgsWkbTypes::PointGeometry || geom.isMultipart() )
return QVariant();
double radius = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
double segment = QgsExpressionUtils::getIntValue( values.at( 2 ), parent );
if ( segment < 3 )
{
parent->setEvalErrorString( QObject::tr( "Segment must be greater than 2" ) );
return QVariant();
}
const QgsPoint *point = qgsgeometry_cast< const QgsPoint * >( geom.constGet() );
QgsCircle circ( *point, radius );
return QVariant::fromValue( QgsGeometry( circ.toPolygon( segment ) ) );
}
static QVariant fcnMakeEllipse( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.isNull() )
return QVariant();
if ( geom.type() != QgsWkbTypes::PointGeometry || geom.isMultipart() )
return QVariant();
double majorAxis = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
double minorAxis = QgsExpressionUtils::getDoubleValue( values.at( 2 ), parent );
double azimuth = QgsExpressionUtils::getDoubleValue( values.at( 3 ), parent );
double segment = QgsExpressionUtils::getIntValue( values.at( 4 ), parent );
if ( segment < 3 )
{
parent->setEvalErrorString( QObject::tr( "Segment must be greater than 2" ) );
return QVariant();
}
const QgsPoint *point = qgsgeometry_cast< const QgsPoint * >( geom.constGet() );
QgsEllipse elp( *point, majorAxis, minorAxis, azimuth );
return QVariant::fromValue( QgsGeometry( elp.toPolygon( segment ) ) );
}
static QVariant fcnMakeRegularPolygon( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry pt1 = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( pt1.isNull() )
return QVariant();
if ( pt1.type() != QgsWkbTypes::PointGeometry || pt1.isMultipart() )
return QVariant();
QgsGeometry pt2 = QgsExpressionUtils::getGeometry( values.at( 1 ), parent );
if ( pt2.isNull() )
return QVariant();
if ( pt2.type() != QgsWkbTypes::PointGeometry || pt2.isMultipart() )
return QVariant();
unsigned int nbEdges = static_cast<unsigned int>( QgsExpressionUtils::getIntValue( values.at( 2 ), parent ) );
if ( nbEdges < 3 )
{
parent->setEvalErrorString( QObject::tr( "Number of edges/sides must be greater than 2" ) );
return QVariant();
}
QgsRegularPolygon::ConstructionOption option = static_cast< QgsRegularPolygon::ConstructionOption >( QgsExpressionUtils::getIntValue( values.at( 3 ), parent ) );
if ( ( option < QgsRegularPolygon::InscribedCircle ) || ( option > QgsRegularPolygon::CircumscribedCircle ) )
{
parent->setEvalErrorString( QObject::tr( "Option can be 0 (inscribed) or 1 (circumscribed)" ) );
return QVariant();
}
const QgsPoint *center = qgsgeometry_cast< const QgsPoint * >( pt1.constGet() );
const QgsPoint *corner = qgsgeometry_cast< const QgsPoint * >( pt2.constGet() );
QgsRegularPolygon rp = QgsRegularPolygon( *center, *corner, nbEdges, option );
return QVariant::fromValue( QgsGeometry( rp.toPolygon() ) );
}
static QVariant pointAt( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent ) // helper function
{
FEAT_FROM_CONTEXT( context, f );
qlonglong idx = QgsExpressionUtils::getIntValue( values.at( 0 ), parent );
QgsGeometry g = f.geometry();
if ( g.isNull() )
return QVariant();
if ( idx < 0 )
{
idx += g.constGet()->nCoordinates();
}
if ( idx < 0 || idx >= g.constGet()->nCoordinates() )
{
parent->setEvalErrorString( QObject::tr( "Index is out of range" ) );
return QVariant();
}
QgsPointXY p = g.vertexAt( idx );
return QVariant( QPointF( p.x(), p.y() ) );
}
static QVariant fcnXat( const QVariantList &values, const QgsExpressionContext *f, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariant v = pointAt( values, f, parent );
if ( v.type() == QVariant::PointF )
return QVariant( v.toPointF().x() );
else
return QVariant();
}
static QVariant fcnYat( const QVariantList &values, const QgsExpressionContext *f, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariant v = pointAt( values, f, parent );
if ( v.type() == QVariant::PointF )
return QVariant( v.toPointF().y() );
else
return QVariant();
}
static QVariant fcnGeometry( const QVariantList &, const QgsExpressionContext *context, QgsExpression *, const QgsExpressionNodeFunction * )
{
FEAT_FROM_CONTEXT( context, f );
QgsGeometry geom = f.geometry();
if ( !geom.isNull() )
return QVariant::fromValue( geom );
else
return QVariant( QVariant::UserType );
}
static QVariant fcnGeomFromWKT( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QString wkt = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
QgsGeometry geom = QgsGeometry::fromWkt( wkt );
QVariant result = !geom.isNull() ? QVariant::fromValue( geom ) : QVariant();
return result;
}
static QVariant fcnGeomFromGML( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QString gml = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
QgsGeometry geom = QgsOgcUtils::geometryFromGML( gml );
QVariant result = !geom.isNull() ? QVariant::fromValue( geom ) : QVariant();
return result;
}
static QVariant fcnGeomArea( const QVariantList &, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
FEAT_FROM_CONTEXT( context, f );
ENSURE_GEOM_TYPE( f, g, QgsWkbTypes::PolygonGeometry );
QgsDistanceArea *calc = parent->geomCalculator();
if ( calc )
{
double area = calc->measureArea( f.geometry() );
area = calc->convertAreaMeasurement( area, parent->areaUnits() );
return QVariant( area );
}
else
{
return QVariant( f.geometry().area() );
}
}
static QVariant fcnArea( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.type() != QgsWkbTypes::PolygonGeometry )
return QVariant();
return QVariant( geom.area() );
}
static QVariant fcnGeomLength( const QVariantList &, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
FEAT_FROM_CONTEXT( context, f );
ENSURE_GEOM_TYPE( f, g, QgsWkbTypes::LineGeometry );
QgsDistanceArea *calc = parent->geomCalculator();
if ( calc )
{
double len = calc->measureLength( f.geometry() );
len = calc->convertLengthMeasurement( len, parent->distanceUnits() );
return QVariant( len );
}
else
{
return QVariant( f.geometry().length() );
}
}
static QVariant fcnGeomPerimeter( const QVariantList &, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
FEAT_FROM_CONTEXT( context, f );
ENSURE_GEOM_TYPE( f, g, QgsWkbTypes::PolygonGeometry );
QgsDistanceArea *calc = parent->geomCalculator();
if ( calc )
{
double len = calc->measurePerimeter( f.geometry() );
len = calc->convertLengthMeasurement( len, parent->distanceUnits() );
return QVariant( len );
}
else
{
return f.geometry().isNull() ? QVariant( 0 ) : QVariant( f.geometry().constGet()->perimeter() );
}
}
static QVariant fcnPerimeter( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.type() != QgsWkbTypes::PolygonGeometry )
return QVariant();
//length for polygons = perimeter
return QVariant( geom.length() );
}
static QVariant fcnGeomNumPoints( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
return QVariant( geom.isNull() ? 0 : geom.constGet()->nCoordinates() );
}
static QVariant fcnGeomNumGeometries( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.isNull() )
return QVariant();
return QVariant( geom.constGet()->partCount() );
}
static QVariant fcnGeomNumInteriorRings( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.isNull() )
return QVariant();
const QgsCurvePolygon *curvePolygon = qgsgeometry_cast< const QgsCurvePolygon * >( geom.constGet() );
if ( curvePolygon )
return QVariant( curvePolygon->numInteriorRings() );
const QgsGeometryCollection *collection = qgsgeometry_cast< const QgsGeometryCollection * >( geom.constGet() );
if ( collection )
{
//find first CurvePolygon in collection
for ( int i = 0; i < collection->numGeometries(); ++i )
{
curvePolygon = qgsgeometry_cast< const QgsCurvePolygon *>( collection->geometryN( i ) );
if ( !curvePolygon )
continue;
return QVariant( curvePolygon->isEmpty() ? 0 : curvePolygon->numInteriorRings() );
}
}
return QVariant();
}
static QVariant fcnGeomNumRings( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.isNull() )
return QVariant();
const QgsCurvePolygon *curvePolygon = qgsgeometry_cast< const QgsCurvePolygon * >( geom.constGet() );
if ( curvePolygon )
return QVariant( curvePolygon->ringCount() );
bool foundPoly = false;
int ringCount = 0;
const QgsGeometryCollection *collection = qgsgeometry_cast< const QgsGeometryCollection * >( geom.constGet() );
if ( collection )
{
//find CurvePolygons in collection
for ( int i = 0; i < collection->numGeometries(); ++i )
{
curvePolygon = qgsgeometry_cast< QgsCurvePolygon *>( collection->geometryN( i ) );
if ( !curvePolygon )
continue;
foundPoly = true;
ringCount += curvePolygon->ringCount();
}
}
if ( !foundPoly )
return QVariant();
return QVariant( ringCount );
}
static QVariant fcnBounds( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry geomBounds = QgsGeometry::fromRect( geom.boundingBox() );
QVariant result = !geomBounds.isNull() ? QVariant::fromValue( geomBounds ) : QVariant();
return result;
}
static QVariant fcnBoundsWidth( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
return QVariant::fromValue( geom.boundingBox().width() );
}
static QVariant fcnBoundsHeight( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
return QVariant::fromValue( geom.boundingBox().height() );
}
static QVariant fcnXMin( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
return QVariant::fromValue( geom.boundingBox().xMinimum() );
}
static QVariant fcnXMax( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
return QVariant::fromValue( geom.boundingBox().xMaximum() );
}
static QVariant fcnYMin( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
return QVariant::fromValue( geom.boundingBox().yMinimum() );
}
static QVariant fcnYMax( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
return QVariant::fromValue( geom.boundingBox().yMaximum() );
}
static QVariant fcnFlipCoordinates( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.isNull() )
return QVariant();
std::unique_ptr< QgsAbstractGeometry > flipped( geom.constGet()->clone() );
flipped->swapXy();
return QVariant::fromValue( QgsGeometry( std::move( flipped ) ) );
}
static QVariant fcnIsClosed( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( fGeom.isNull() )
return QVariant();
const QgsCurve *curve = qgsgeometry_cast< const QgsCurve * >( fGeom.constGet() );
if ( !curve )
return QVariant();
return QVariant::fromValue( curve->isClosed() );
}
static QVariant fcnRelate( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
if ( values.length() < 2 || values.length() > 3 )
return QVariant();
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry sGeom = QgsExpressionUtils::getGeometry( values.at( 1 ), parent );
if ( fGeom.isNull() || sGeom.isNull() )
return QVariant();
std::unique_ptr<QgsGeometryEngine> engine( QgsGeometry::createGeometryEngine( fGeom.constGet() ) );
if ( values.length() == 2 )
{
//two geometry arguments, return relation
QString result = engine->relate( sGeom.constGet() );
return QVariant::fromValue( result );
}
else
{
//three arguments, test pattern
QString pattern = QgsExpressionUtils::getStringValue( values.at( 2 ), parent );
bool result = engine->relatePattern( sGeom.constGet(), pattern );
return QVariant::fromValue( result );
}
}
static QVariant fcnBbox( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry sGeom = QgsExpressionUtils::getGeometry( values.at( 1 ), parent );
return fGeom.intersects( sGeom.boundingBox() ) ? TVL_True : TVL_False;
}
static QVariant fcnDisjoint( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry sGeom = QgsExpressionUtils::getGeometry( values.at( 1 ), parent );
return fGeom.disjoint( sGeom ) ? TVL_True : TVL_False;
}
static QVariant fcnIntersects( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry sGeom = QgsExpressionUtils::getGeometry( values.at( 1 ), parent );
return fGeom.intersects( sGeom ) ? TVL_True : TVL_False;
}
static QVariant fcnTouches( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry sGeom = QgsExpressionUtils::getGeometry( values.at( 1 ), parent );
return fGeom.touches( sGeom ) ? TVL_True : TVL_False;
}
static QVariant fcnCrosses( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry sGeom = QgsExpressionUtils::getGeometry( values.at( 1 ), parent );
return fGeom.crosses( sGeom ) ? TVL_True : TVL_False;
}
static QVariant fcnContains( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry sGeom = QgsExpressionUtils::getGeometry( values.at( 1 ), parent );
return fGeom.contains( sGeom ) ? TVL_True : TVL_False;
}
static QVariant fcnOverlaps( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry sGeom = QgsExpressionUtils::getGeometry( values.at( 1 ), parent );
return fGeom.overlaps( sGeom ) ? TVL_True : TVL_False;
}
static QVariant fcnWithin( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry sGeom = QgsExpressionUtils::getGeometry( values.at( 1 ), parent );
return fGeom.within( sGeom ) ? TVL_True : TVL_False;
}
static QVariant fcnBuffer( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
if ( values.length() < 2 || values.length() > 3 )
return QVariant();
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
double dist = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
qlonglong seg = 8;
if ( values.length() == 3 )
seg = QgsExpressionUtils::getIntValue( values.at( 2 ), parent );
QgsGeometry geom = fGeom.buffer( dist, seg );
QVariant result = !geom.isNull() ? QVariant::fromValue( geom ) : QVariant();
return result;
}
static QVariant fcnWedgeBuffer( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
const QgsPoint *pt = qgsgeometry_cast<const QgsPoint *>( fGeom.constGet() );
if ( !pt )
{
parent->setEvalErrorString( QObject::tr( "Function `wedge_buffer` requires a point value for the center." ) );
return QVariant();
}
double azimuth = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
double width = QgsExpressionUtils::getDoubleValue( values.at( 2 ), parent );
double outerRadius = QgsExpressionUtils::getDoubleValue( values.at( 3 ), parent );
double innerRadius = QgsExpressionUtils::getDoubleValue( values.at( 4 ), parent );
QgsGeometry geom = QgsGeometry::createWedgeBuffer( *pt, azimuth, width, outerRadius, innerRadius );
QVariant result = !geom.isNull() ? QVariant::fromValue( geom ) : QVariant();
return result;
}
static QVariant fcnTaperedBuffer( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( fGeom.type() != QgsWkbTypes::LineGeometry )
{
parent->setEvalErrorString( QObject::tr( "Function `tapered_buffer` requires a line geometry." ) );
return QVariant();
}
double startWidth = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
double endWidth = QgsExpressionUtils::getDoubleValue( values.at( 2 ), parent );
int segments = static_cast< int >( QgsExpressionUtils::getIntValue( values.at( 3 ), parent ) );
QgsGeometry geom = fGeom.taperedBuffer( startWidth, endWidth, segments );
QVariant result = !geom.isNull() ? QVariant::fromValue( geom ) : QVariant();
return result;
}
static QVariant fcnBufferByM( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( fGeom.type() != QgsWkbTypes::LineGeometry )
{
parent->setEvalErrorString( QObject::tr( "Function `buffer_by_m` requires a line geometry." ) );
return QVariant();
}
int segments = static_cast< int >( QgsExpressionUtils::getIntValue( values.at( 1 ), parent ) );
QgsGeometry geom = fGeom.variableWidthBufferByM( segments );
QVariant result = !geom.isNull() ? QVariant::fromValue( geom ) : QVariant();
return result;
}
static QVariant fcnOffsetCurve( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
double dist = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
qlonglong segments = QgsExpressionUtils::getIntValue( values.at( 2 ), parent );
QgsGeometry::JoinStyle join = static_cast< QgsGeometry::JoinStyle >( QgsExpressionUtils::getIntValue( values.at( 3 ), parent ) );
if ( join < QgsGeometry::JoinStyleRound || join > QgsGeometry::JoinStyleBevel )
return QVariant();
double miterLimit = QgsExpressionUtils::getDoubleValue( values.at( 3 ), parent );
QgsGeometry geom = fGeom.offsetCurve( dist, segments, join, miterLimit );
QVariant result = !geom.isNull() ? QVariant::fromValue( geom ) : QVariant();
return result;
}
static QVariant fcnSingleSidedBuffer( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
double dist = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
qlonglong segments = QgsExpressionUtils::getIntValue( values.at( 2 ), parent );
QgsGeometry::JoinStyle join = static_cast< QgsGeometry::JoinStyle >( QgsExpressionUtils::getIntValue( values.at( 3 ), parent ) );
if ( join < QgsGeometry::JoinStyleRound || join > QgsGeometry::JoinStyleBevel )
return QVariant();
double miterLimit = QgsExpressionUtils::getDoubleValue( values.at( 3 ), parent );
QgsGeometry geom = fGeom.singleSidedBuffer( dist, segments, QgsGeometry::SideLeft, join, miterLimit );
QVariant result = !geom.isNull() ? QVariant::fromValue( geom ) : QVariant();
return result;
}
static QVariant fcnExtend( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
double distStart = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
double distEnd = QgsExpressionUtils::getDoubleValue( values.at( 2 ), parent );
QgsGeometry geom = fGeom.extendLine( distStart, distEnd );
QVariant result = !geom.isNull() ? QVariant::fromValue( geom ) : QVariant();
return result;
}
static QVariant fcnTranslate( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
double dx = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
double dy = QgsExpressionUtils::getDoubleValue( values.at( 2 ), parent );
fGeom.translate( dx, dy );
return QVariant::fromValue( fGeom );
}
static QVariant fcnCentroid( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry geom = fGeom.centroid();
QVariant result = !geom.isNull() ? QVariant::fromValue( geom ) : QVariant();
return result;
}
static QVariant fcnPointOnSurface( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry geom = fGeom.pointOnSurface();
QVariant result = !geom.isNull() ? QVariant::fromValue( geom ) : QVariant();
return result;
}
static QVariant fcnPoleOfInaccessibility( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
double tolerance = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
QgsGeometry geom = fGeom.poleOfInaccessibility( tolerance );
QVariant result = !geom.isNull() ? QVariant::fromValue( geom ) : QVariant();
return result;
}
static QVariant fcnConvexHull( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry geom = fGeom.convexHull();
QVariant result = !geom.isNull() ? QVariant::fromValue( geom ) : QVariant();
return result;
}
static QVariant fcnMinimalCircle( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
unsigned int segments = 36;
if ( values.length() == 2 )
segments = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
QgsGeometry geom = fGeom.minimalEnclosingCircle( segments );
QVariant result = !geom.isNull() ? QVariant::fromValue( geom ) : QVariant();
return result;
}
static QVariant fcnOrientedBBox( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry geom = fGeom.orientedMinimumBoundingBox( );
QVariant result = !geom.isNull() ? QVariant::fromValue( geom ) : QVariant();
return result;
}
static QVariant fcnDifference( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry sGeom = QgsExpressionUtils::getGeometry( values.at( 1 ), parent );
QgsGeometry geom = fGeom.difference( sGeom );
QVariant result = !geom.isNull() ? QVariant::fromValue( geom ) : QVariant();
return result;
}
static QVariant fcnReverse( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( fGeom.isNull() )
return QVariant();
QVariant result;
if ( !fGeom.isMultipart() )
{
const QgsCurve *curve = qgsgeometry_cast<const QgsCurve * >( fGeom.constGet() );
if ( !curve )
return QVariant();
QgsCurve *reversed = curve->reversed();
result = reversed ? QVariant::fromValue( QgsGeometry( reversed ) ) : QVariant();
}
else
{
const QgsGeometryCollection *collection = qgsgeometry_cast< const QgsGeometryCollection *>( fGeom.constGet() );
std::unique_ptr< QgsGeometryCollection > reversed( collection->createEmptyWithSameType() );
for ( int i = 0; i < collection->numGeometries(); ++i )
{
if ( const QgsCurve *curve = qgsgeometry_cast<const QgsCurve * >( collection->geometryN( i ) ) )
{
reversed->addGeometry( curve->reversed() );
}
else
{
reversed->addGeometry( collection->geometryN( i )->clone() );
}
}
result = reversed ? QVariant::fromValue( QgsGeometry( std::move( reversed ) ) ) : QVariant();
}
return result;
}
static QVariant fcnExteriorRing( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( fGeom.isNull() )
return QVariant();
const QgsCurvePolygon *curvePolygon = qgsgeometry_cast< const QgsCurvePolygon * >( fGeom.constGet() );
if ( !curvePolygon || !curvePolygon->exteriorRing() )
return QVariant();
QgsCurve *exterior = static_cast< QgsCurve * >( curvePolygon->exteriorRing()->clone() );
QVariant result = exterior ? QVariant::fromValue( QgsGeometry( exterior ) ) : QVariant();
return result;
}
static QVariant fcnDistance( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry sGeom = QgsExpressionUtils::getGeometry( values.at( 1 ), parent );
return QVariant( fGeom.distance( sGeom ) );
}
static QVariant fcnHausdorffDistance( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry g1 = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry g2 = QgsExpressionUtils::getGeometry( values.at( 1 ), parent );
double res = -1;
if ( values.length() == 3 && values.at( 2 ).isValid() )
{
double densify = QgsExpressionUtils::getDoubleValue( values.at( 2 ), parent );
densify = qBound( 0.0, densify, 1.0 );
res = g1.hausdorffDistanceDensify( g2, densify );
}
else
{
res = g1.hausdorffDistance( g2 );
}
return res > -1 ? QVariant( res ) : QVariant();
}
static QVariant fcnIntersection( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry sGeom = QgsExpressionUtils::getGeometry( values.at( 1 ), parent );
QgsGeometry geom = fGeom.intersection( sGeom );
QVariant result = !geom.isNull() ? QVariant::fromValue( geom ) : QVariant();
return result;
}
static QVariant fcnSymDifference( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry sGeom = QgsExpressionUtils::getGeometry( values.at( 1 ), parent );
QgsGeometry geom = fGeom.symDifference( sGeom );
QVariant result = !geom.isNull() ? QVariant::fromValue( geom ) : QVariant();
return result;
}
static QVariant fcnCombine( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry sGeom = QgsExpressionUtils::getGeometry( values.at( 1 ), parent );
QgsGeometry geom = fGeom.combine( sGeom );
QVariant result = !geom.isNull() ? QVariant::fromValue( geom ) : QVariant();
return result;
}
static QVariant fcnGeomToWKT( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
if ( values.length() < 1 || values.length() > 2 )
return QVariant();
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
qlonglong prec = 8;
if ( values.length() == 2 )
prec = QgsExpressionUtils::getIntValue( values.at( 1 ), parent );
QString wkt = fGeom.asWkt( prec );
return QVariant( wkt );
}
static QVariant fcnAzimuth( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
if ( values.length() != 2 )
{
parent->setEvalErrorString( QObject::tr( "Function `azimuth` requires exactly two parameters. %1 given." ).arg( values.length() ) );
return QVariant();
}
QgsGeometry fGeom1 = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry fGeom2 = QgsExpressionUtils::getGeometry( values.at( 1 ), parent );
const QgsPoint *pt1 = qgsgeometry_cast<const QgsPoint *>( fGeom1.constGet() );
const QgsPoint *pt2 = qgsgeometry_cast<const QgsPoint *>( fGeom2.constGet() );
if ( !pt1 || !pt2 )
{
parent->setEvalErrorString( QObject::tr( "Function `azimuth` requires two points as arguments." ) );
return QVariant();
}
// Code from PostGIS
if ( pt1->x() == pt2->x() )
{
if ( pt1->y() < pt2->y() )
return 0.0;
else if ( pt1->y() > pt2->y() )
return M_PI;
else
return 0;
}
if ( pt1->y() == pt2->y() )
{
if ( pt1->x() < pt2->x() )
return M_PI_2;
else if ( pt1->x() > pt2->x() )
return M_PI + ( M_PI_2 );
else
return 0;
}
if ( pt1->x() < pt2->x() )
{
if ( pt1->y() < pt2->y() )
{
return std::atan( std::fabs( pt1->x() - pt2->x() ) / std::fabs( pt1->y() - pt2->y() ) );
}
else /* ( pt1->y() > pt2->y() ) - equality case handled above */
{
return std::atan( std::fabs( pt1->y() - pt2->y() ) / std::fabs( pt1->x() - pt2->x() ) )
+ ( M_PI_2 );
}
}
else /* ( pt1->x() > pt2->x() ) - equality case handled above */
{
if ( pt1->y() > pt2->y() )
{
return std::atan( std::fabs( pt1->x() - pt2->x() ) / std::fabs( pt1->y() - pt2->y() ) )
+ M_PI;
}
else /* ( pt1->y() < pt2->y() ) - equality case handled above */
{
return std::atan( std::fabs( pt1->y() - pt2->y() ) / std::fabs( pt1->x() - pt2->x() ) )
+ ( M_PI + ( M_PI_2 ) );
}
}
}
static QVariant fcnProject( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( geom.type() != QgsWkbTypes::PointGeometry )
{
parent->setEvalErrorString( QStringLiteral( "'project' requires a point geometry" ) );
return QVariant();
}
double distance = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
double azimuth = QgsExpressionUtils::getDoubleValue( values.at( 2 ), parent );
double inclination = QgsExpressionUtils::getDoubleValue( values.at( 3 ), parent );
const QgsPoint *p = static_cast<const QgsPoint *>( geom.constGet() );
QgsPoint newPoint = p->project( distance, 180.0 * azimuth / M_PI, 180.0 * inclination / M_PI );
return QVariant::fromValue( QgsGeometry( new QgsPoint( newPoint ) ) );
}
static QVariant fcnInclination( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom1 = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry fGeom2 = QgsExpressionUtils::getGeometry( values.at( 1 ), parent );
const QgsPoint *pt1 = qgsgeometry_cast<const QgsPoint *>( fGeom1.constGet() );
const QgsPoint *pt2 = qgsgeometry_cast<const QgsPoint *>( fGeom2.constGet() );
if ( ( fGeom1.type() != QgsWkbTypes::PointGeometry ) || ( fGeom2.type() != QgsWkbTypes::PointGeometry ) ||
!pt1 || !pt2 )
{
parent->setEvalErrorString( QStringLiteral( "Function 'inclination' requires two points as arguments." ) );
return QVariant();
}
return pt1->inclination( *pt2 );
}
static QVariant fcnExtrude( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
if ( values.length() != 3 )
return QVariant();
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
double x = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
double y = QgsExpressionUtils::getDoubleValue( values.at( 2 ), parent );
QgsGeometry geom = fGeom.extrude( x, y );
QVariant result = geom.constGet() ? QVariant::fromValue( geom ) : QVariant();
return result;
}
static QVariant fcnOrderParts( const QVariantList &values, const QgsExpressionContext *ctx, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
if ( values.length() < 2 )
return QVariant();
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( !fGeom.isMultipart() )
return values.at( 0 );
QString expString = QgsExpressionUtils::getStringValue( values.at( 1 ), parent );
QVariant cachedExpression;
if ( ctx )
cachedExpression = ctx->cachedValue( expString );
QgsExpression expression;
if ( cachedExpression.isValid() )
{
expression = cachedExpression.value<QgsExpression>();
}
else
expression = QgsExpression( expString );
bool asc = values.value( 2 ).toBool();
QgsExpressionContext *unconstedContext = nullptr;
QgsFeature f;
if ( ctx )
{
// ExpressionSorter wants a modifiable expression context, but it will return it in the same shape after
// so no reason to worry
unconstedContext = const_cast<QgsExpressionContext *>( ctx );
f = ctx->feature();
}
else
{
// If there's no context provided, create a fake one
unconstedContext = new QgsExpressionContext();
}
const QgsGeometryCollection *collection = qgsgeometry_cast<const QgsGeometryCollection *>( fGeom.constGet() );
Q_ASSERT( collection ); // Should have failed the multipart check above
QgsFeatureRequest::OrderBy orderBy;
orderBy.append( QgsFeatureRequest::OrderByClause( expression, asc ) );
QgsExpressionSorter sorter( orderBy );
QList<QgsFeature> partFeatures;
partFeatures.reserve( collection->partCount() );
for ( int i = 0; i < collection->partCount(); ++i )
{
f.setGeometry( QgsGeometry( collection->geometryN( i )->clone() ) );
partFeatures << f;
}
sorter.sortFeatures( partFeatures, unconstedContext );
QgsGeometryCollection *orderedGeom = qgsgeometry_cast<QgsGeometryCollection *>( fGeom.constGet()->clone() );
Q_ASSERT( orderedGeom );
while ( orderedGeom->partCount() )
orderedGeom->removeGeometry( 0 );
for ( const QgsFeature &feature : qgis::as_const( partFeatures ) )
{
orderedGeom->addGeometry( feature.geometry().constGet()->clone() );
}
QVariant result = QVariant::fromValue( QgsGeometry( orderedGeom ) );
if ( !ctx )
delete unconstedContext;
return result;
}
static QVariant fcnClosestPoint( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fromGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry toGeom = QgsExpressionUtils::getGeometry( values.at( 1 ), parent );
QgsGeometry geom = fromGeom.nearestPoint( toGeom );
QVariant result = !geom.isNull() ? QVariant::fromValue( geom ) : QVariant();
return result;
}
static QVariant fcnShortestLine( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fromGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry toGeom = QgsExpressionUtils::getGeometry( values.at( 1 ), parent );
QgsGeometry geom = fromGeom.shortestLine( toGeom );
QVariant result = !geom.isNull() ? QVariant::fromValue( geom ) : QVariant();
return result;
}
static QVariant fcnLineInterpolatePoint( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry lineGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
double distance = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
QgsGeometry geom = lineGeom.interpolate( distance );
QVariant result = !geom.isNull() ? QVariant::fromValue( geom ) : QVariant();
return result;
}
static QVariant fcnLineSubset( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry lineGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
if ( lineGeom.type() != QgsWkbTypes::LineGeometry )
{
parent->setEvalErrorString( QObject::tr( "line_substring requires a curve geometry input" ) );
return QVariant();
}
const QgsCurve *curve = nullptr;
if ( !lineGeom.isMultipart() )
curve = qgsgeometry_cast< const QgsCurve * >( lineGeom.constGet() );
else
{
if ( const QgsGeometryCollection *collection = qgsgeometry_cast< const QgsGeometryCollection * >( lineGeom.constGet() ) )
{
if ( collection->numGeometries() > 0 )
{
curve = qgsgeometry_cast< const QgsCurve * >( collection->geometryN( 0 ) );
}
}
}
if ( !curve )
return QVariant();
double startDistance = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
double endDistance = QgsExpressionUtils::getDoubleValue( values.at( 2 ), parent );
std::unique_ptr< QgsCurve > substring( curve->curveSubstring( startDistance, endDistance ) );
QgsGeometry result( std::move( substring ) );
return !result.isNull() ? QVariant::fromValue( result ) : QVariant();
}
static QVariant fcnLineInterpolateAngle( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry lineGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
double distance = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
return lineGeom.interpolateAngle( distance ) * 180.0 / M_PI;
}
static QVariant fcnAngleAtVertex( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
qlonglong vertex = QgsExpressionUtils::getIntValue( values.at( 1 ), parent );
return geom.angleAtVertex( vertex ) * 180.0 / M_PI;
}
static QVariant fcnDistanceToVertex( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry geom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
qlonglong vertex = QgsExpressionUtils::getIntValue( values.at( 1 ), parent );
return geom.distanceToVertex( vertex );
}
static QVariant fcnLineLocatePoint( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry lineGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QgsGeometry pointGeom = QgsExpressionUtils::getGeometry( values.at( 1 ), parent );
double distance = lineGeom.lineLocatePoint( pointGeom );
return distance >= 0 ? distance : QVariant();
}
static QVariant fcnRound( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
if ( values.length() == 2 && values.at( 1 ).toInt() != 0 )
{
double number = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
double scaler = std::pow( 10.0, QgsExpressionUtils::getIntValue( values.at( 1 ), parent ) );
return QVariant( std::round( number * scaler ) / scaler );
}
if ( values.length() >= 1 )
{
double number = QgsExpressionUtils::getIntValue( values.at( 0 ), parent );
return QVariant( qlonglong( std::round( number ) ) );
}
return QVariant();
}
static QVariant fcnPi( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
Q_UNUSED( values );
Q_UNUSED( parent );
return M_PI;
}
static QVariant fcnFormatNumber( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
double value = QgsExpressionUtils::getDoubleValue( values.at( 0 ), parent );
int places = QgsExpressionUtils::getIntValue( values.at( 1 ), parent );
if ( places < 0 )
{
parent->setEvalErrorString( QObject::tr( "Number of places must be positive" ) );
return QVariant();
}
QLocale locale = QLocale();
locale.setNumberOptions( locale.numberOptions() &= ~QLocale::NumberOption::OmitGroupSeparator );
return locale.toString( value, 'f', places );
}
static QVariant fcnFormatDate( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QDateTime dt = QgsExpressionUtils::getDateTimeValue( values.at( 0 ), parent );
QString format = QgsExpressionUtils::getStringValue( values.at( 1 ), parent );
return dt.toString( format );
}
static QVariant fcnColorGrayscaleAverage( const QVariantList &values, const QgsExpressionContext *, QgsExpression *, const QgsExpressionNodeFunction * )
{
QColor color = QgsSymbolLayerUtils::decodeColor( values.at( 0 ).toString() );
int avg = ( color.red() + color.green() + color.blue() ) / 3;
int alpha = color.alpha();
color.setRgb( avg, avg, avg, alpha );
return QgsSymbolLayerUtils::encodeColor( color );
}
static QVariant fcnColorMixRgb( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QColor color1 = QgsSymbolLayerUtils::decodeColor( values.at( 0 ).toString() );
QColor color2 = QgsSymbolLayerUtils::decodeColor( values.at( 1 ).toString() );
double ratio = QgsExpressionUtils::getDoubleValue( values.at( 2 ), parent );
if ( ratio > 1 )
{
ratio = 1;
}
else if ( ratio < 0 )
{
ratio = 0;
}
int red = color1.red() * ( 1 - ratio ) + color2.red() * ratio;
int green = color1.green() * ( 1 - ratio ) + color2.green() * ratio;
int blue = color1.blue() * ( 1 - ratio ) + color2.blue() * ratio;
int alpha = color1.alpha() * ( 1 - ratio ) + color2.alpha() * ratio;
QColor newColor( red, green, blue, alpha );
return QgsSymbolLayerUtils::encodeColor( newColor );
}
static QVariant fcnColorRgb( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
int red = QgsExpressionUtils::getIntValue( values.at( 0 ), parent );
int green = QgsExpressionUtils::getIntValue( values.at( 1 ), parent );
int blue = QgsExpressionUtils::getIntValue( values.at( 2 ), parent );
QColor color = QColor( red, green, blue );
if ( ! color.isValid() )
{
parent->setEvalErrorString( QObject::tr( "Cannot convert '%1:%2:%3' to color" ).arg( red ).arg( green ).arg( blue ) );
color = QColor( 0, 0, 0 );
}
return QStringLiteral( "%1,%2,%3" ).arg( color.red() ).arg( color.green() ).arg( color.blue() );
}
static QVariant fcnIf( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsExpressionNode *node = QgsExpressionUtils::getNode( values.at( 0 ), parent );
ENSURE_NO_EVAL_ERROR;
QVariant value = node->eval( parent, context );
ENSURE_NO_EVAL_ERROR;
if ( value.toBool() )
{
node = QgsExpressionUtils::getNode( values.at( 1 ), parent );
ENSURE_NO_EVAL_ERROR;
value = node->eval( parent, context );
ENSURE_NO_EVAL_ERROR;
}
else
{
node = QgsExpressionUtils::getNode( values.at( 2 ), parent );
ENSURE_NO_EVAL_ERROR;
value = node->eval( parent, context );
ENSURE_NO_EVAL_ERROR;
}
return value;
}
static QVariant fncColorRgba( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
int red = QgsExpressionUtils::getIntValue( values.at( 0 ), parent );
int green = QgsExpressionUtils::getIntValue( values.at( 1 ), parent );
int blue = QgsExpressionUtils::getIntValue( values.at( 2 ), parent );
int alpha = QgsExpressionUtils::getIntValue( values.at( 3 ), parent );
QColor color = QColor( red, green, blue, alpha );
if ( ! color.isValid() )
{
parent->setEvalErrorString( QObject::tr( "Cannot convert '%1:%2:%3:%4' to color" ).arg( red ).arg( green ).arg( blue ).arg( alpha ) );
color = QColor( 0, 0, 0 );
}
return QgsSymbolLayerUtils::encodeColor( color );
}
QVariant fcnRampColor( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGradientColorRamp expRamp;
const QgsColorRamp *ramp = nullptr;
if ( values.at( 0 ).canConvert<QgsGradientColorRamp>() )
{
expRamp = QgsExpressionUtils::getRamp( values.at( 0 ), parent );
ramp = &expRamp;
}
else
{
QString rampName = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
ramp = QgsStyle::defaultStyle()->colorRampRef( rampName );
if ( ! ramp )
{
parent->setEvalErrorString( QObject::tr( "\"%1\" is not a valid color ramp" ).arg( rampName ) );
return QVariant();
}
}
double value = QgsExpressionUtils::getDoubleValue( values.at( 1 ), parent );
QColor color = ramp->color( value );
return QgsSymbolLayerUtils::encodeColor( color );
}
static QVariant fcnColorHsl( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
// Hue ranges from 0 - 360
double hue = QgsExpressionUtils::getIntValue( values.at( 0 ), parent ) / 360.0;
// Saturation ranges from 0 - 100
double saturation = QgsExpressionUtils::getIntValue( values.at( 1 ), parent ) / 100.0;
// Lightness ranges from 0 - 100
double lightness = QgsExpressionUtils::getIntValue( values.at( 2 ), parent ) / 100.0;
QColor color = QColor::fromHslF( hue, saturation, lightness );
if ( ! color.isValid() )
{
parent->setEvalErrorString( QObject::tr( "Cannot convert '%1:%2:%3' to color" ).arg( hue ).arg( saturation ).arg( lightness ) );
color = QColor( 0, 0, 0 );
}
return QStringLiteral( "%1,%2,%3" ).arg( color.red() ).arg( color.green() ).arg( color.blue() );
}
static QVariant fncColorHsla( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
// Hue ranges from 0 - 360
double hue = QgsExpressionUtils::getIntValue( values.at( 0 ), parent ) / 360.0;
// Saturation ranges from 0 - 100
double saturation = QgsExpressionUtils::getIntValue( values.at( 1 ), parent ) / 100.0;
// Lightness ranges from 0 - 100
double lightness = QgsExpressionUtils::getIntValue( values.at( 2 ), parent ) / 100.0;
// Alpha ranges from 0 - 255
double alpha = QgsExpressionUtils::getIntValue( values.at( 3 ), parent ) / 255.0;
QColor color = QColor::fromHslF( hue, saturation, lightness, alpha );
if ( ! color.isValid() )
{
parent->setEvalErrorString( QObject::tr( "Cannot convert '%1:%2:%3:%4' to color" ).arg( hue ).arg( saturation ).arg( lightness ).arg( alpha ) );
color = QColor( 0, 0, 0 );
}
return QgsSymbolLayerUtils::encodeColor( color );
}
static QVariant fcnColorHsv( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
// Hue ranges from 0 - 360
double hue = QgsExpressionUtils::getIntValue( values.at( 0 ), parent ) / 360.0;
// Saturation ranges from 0 - 100
double saturation = QgsExpressionUtils::getIntValue( values.at( 1 ), parent ) / 100.0;
// Value ranges from 0 - 100
double value = QgsExpressionUtils::getIntValue( values.at( 2 ), parent ) / 100.0;
QColor color = QColor::fromHsvF( hue, saturation, value );
if ( ! color.isValid() )
{
parent->setEvalErrorString( QObject::tr( "Cannot convert '%1:%2:%3' to color" ).arg( hue ).arg( saturation ).arg( value ) );
color = QColor( 0, 0, 0 );
}
return QStringLiteral( "%1,%2,%3" ).arg( color.red() ).arg( color.green() ).arg( color.blue() );
}
static QVariant fncColorHsva( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
// Hue ranges from 0 - 360
double hue = QgsExpressionUtils::getIntValue( values.at( 0 ), parent ) / 360.0;
// Saturation ranges from 0 - 100
double saturation = QgsExpressionUtils::getIntValue( values.at( 1 ), parent ) / 100.0;
// Value ranges from 0 - 100
double value = QgsExpressionUtils::getIntValue( values.at( 2 ), parent ) / 100.0;
// Alpha ranges from 0 - 255
double alpha = QgsExpressionUtils::getIntValue( values.at( 3 ), parent ) / 255.0;
QColor color = QColor::fromHsvF( hue, saturation, value, alpha );
if ( ! color.isValid() )
{
parent->setEvalErrorString( QObject::tr( "Cannot convert '%1:%2:%3:%4' to color" ).arg( hue ).arg( saturation ).arg( value ).arg( alpha ) );
color = QColor( 0, 0, 0 );
}
return QgsSymbolLayerUtils::encodeColor( color );
}
static QVariant fcnColorCmyk( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
// Cyan ranges from 0 - 100
double cyan = QgsExpressionUtils::getIntValue( values.at( 0 ), parent ) / 100.0;
// Magenta ranges from 0 - 100
double magenta = QgsExpressionUtils::getIntValue( values.at( 1 ), parent ) / 100.0;
// Yellow ranges from 0 - 100
double yellow = QgsExpressionUtils::getIntValue( values.at( 2 ), parent ) / 100.0;
// Black ranges from 0 - 100
double black = QgsExpressionUtils::getIntValue( values.at( 3 ), parent ) / 100.0;
QColor color = QColor::fromCmykF( cyan, magenta, yellow, black );
if ( ! color.isValid() )
{
parent->setEvalErrorString( QObject::tr( "Cannot convert '%1:%2:%3:%4' to color" ).arg( cyan ).arg( magenta ).arg( yellow ).arg( black ) );
color = QColor( 0, 0, 0 );
}
return QStringLiteral( "%1,%2,%3" ).arg( color.red() ).arg( color.green() ).arg( color.blue() );
}
static QVariant fncColorCmyka( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
// Cyan ranges from 0 - 100
double cyan = QgsExpressionUtils::getIntValue( values.at( 0 ), parent ) / 100.0;
// Magenta ranges from 0 - 100
double magenta = QgsExpressionUtils::getIntValue( values.at( 1 ), parent ) / 100.0;
// Yellow ranges from 0 - 100
double yellow = QgsExpressionUtils::getIntValue( values.at( 2 ), parent ) / 100.0;
// Black ranges from 0 - 100
double black = QgsExpressionUtils::getIntValue( values.at( 3 ), parent ) / 100.0;
// Alpha ranges from 0 - 255
double alpha = QgsExpressionUtils::getIntValue( values.at( 4 ), parent ) / 255.0;
QColor color = QColor::fromCmykF( cyan, magenta, yellow, black, alpha );
if ( ! color.isValid() )
{
parent->setEvalErrorString( QObject::tr( "Cannot convert '%1:%2:%3:%4:%5' to color" ).arg( cyan ).arg( magenta ).arg( yellow ).arg( black ).arg( alpha ) );
color = QColor( 0, 0, 0 );
}
return QgsSymbolLayerUtils::encodeColor( color );
}
static QVariant fncColorPart( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QColor color = QgsSymbolLayerUtils::decodeColor( values.at( 0 ).toString() );
if ( ! color.isValid() )
{
parent->setEvalErrorString( QObject::tr( "Cannot convert '%1' to color" ).arg( values.at( 0 ).toString() ) );
return QVariant();
}
QString part = QgsExpressionUtils::getStringValue( values.at( 1 ), parent );
if ( part.compare( QLatin1String( "red" ), Qt::CaseInsensitive ) == 0 )
return color.red();
else if ( part.compare( QLatin1String( "green" ), Qt::CaseInsensitive ) == 0 )
return color.green();
else if ( part.compare( QLatin1String( "blue" ), Qt::CaseInsensitive ) == 0 )
return color.blue();
else if ( part.compare( QLatin1String( "alpha" ), Qt::CaseInsensitive ) == 0 )
return color.alpha();
else if ( part.compare( QLatin1String( "hue" ), Qt::CaseInsensitive ) == 0 )
return color.hsvHueF() * 360;
else if ( part.compare( QLatin1String( "saturation" ), Qt::CaseInsensitive ) == 0 )
return color.hsvSaturationF() * 100;
else if ( part.compare( QLatin1String( "value" ), Qt::CaseInsensitive ) == 0 )
return color.valueF() * 100;
else if ( part.compare( QLatin1String( "hsl_hue" ), Qt::CaseInsensitive ) == 0 )
return color.hslHueF() * 360;
else if ( part.compare( QLatin1String( "hsl_saturation" ), Qt::CaseInsensitive ) == 0 )
return color.hslSaturationF() * 100;
else if ( part.compare( QLatin1String( "lightness" ), Qt::CaseInsensitive ) == 0 )
return color.lightnessF() * 100;
else if ( part.compare( QLatin1String( "cyan" ), Qt::CaseInsensitive ) == 0 )
return color.cyanF() * 100;
else if ( part.compare( QLatin1String( "magenta" ), Qt::CaseInsensitive ) == 0 )
return color.magentaF() * 100;
else if ( part.compare( QLatin1String( "yellow" ), Qt::CaseInsensitive ) == 0 )
return color.yellowF() * 100;
else if ( part.compare( QLatin1String( "black" ), Qt::CaseInsensitive ) == 0 )
return color.blackF() * 100;
parent->setEvalErrorString( QObject::tr( "Unknown color component '%1'" ).arg( part ) );
return QVariant();
}
static QVariant fcnCreateRamp( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
const QVariantMap map = QgsExpressionUtils::getMapValue( values.at( 0 ), parent );
if ( map.count() < 1 )
{
parent->setEvalErrorString( QObject::tr( "A minimum of two colors is required to create a ramp" ) );
return QVariant();
}
QList< QColor > colors;
QgsGradientStopsList stops;
for ( QVariantMap::const_iterator it = map.constBegin(); it != map.constEnd(); ++it )
{
colors << QgsSymbolLayerUtils::decodeColor( it.value().toString() );
if ( !colors.last().isValid() )
{
parent->setEvalErrorString( QObject::tr( "Cannot convert '%1' to color" ).arg( it.value().toString() ) );
return QVariant();
}
double step = it.key().toDouble();
if ( it == map.constBegin() )
{
if ( step != 0.0 )
stops << QgsGradientStop( step, colors.last() );
}
else if ( it == map.constEnd() )
{
if ( step != 1.0 )
stops << QgsGradientStop( step, colors.last() );
}
else
{
stops << QgsGradientStop( step, colors.last() );
}
}
bool discrete = values.at( 1 ).toBool();
return QVariant::fromValue( QgsGradientColorRamp( colors.first(), colors.last(), discrete, stops ) );
}
static QVariant fncSetColorPart( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QColor color = QgsSymbolLayerUtils::decodeColor( values.at( 0 ).toString() );
if ( ! color.isValid() )
{
parent->setEvalErrorString( QObject::tr( "Cannot convert '%1' to color" ).arg( values.at( 0 ).toString() ) );
return QVariant();
}
QString part = QgsExpressionUtils::getStringValue( values.at( 1 ), parent );
int value = QgsExpressionUtils::getIntValue( values.at( 2 ), parent );
if ( part.compare( QLatin1String( "red" ), Qt::CaseInsensitive ) == 0 )
color.setRed( value );
else if ( part.compare( QLatin1String( "green" ), Qt::CaseInsensitive ) == 0 )
color.setGreen( value );
else if ( part.compare( QLatin1String( "blue" ), Qt::CaseInsensitive ) == 0 )
color.setBlue( value );
else if ( part.compare( QLatin1String( "alpha" ), Qt::CaseInsensitive ) == 0 )
color.setAlpha( value );
else if ( part.compare( QLatin1String( "hue" ), Qt::CaseInsensitive ) == 0 )
color.setHsv( value, color.hsvSaturation(), color.value(), color.alpha() );
else if ( part.compare( QLatin1String( "saturation" ), Qt::CaseInsensitive ) == 0 )
color.setHsvF( color.hsvHueF(), value / 100.0, color.valueF(), color.alphaF() );
else if ( part.compare( QLatin1String( "value" ), Qt::CaseInsensitive ) == 0 )
color.setHsvF( color.hsvHueF(), color.hsvSaturationF(), value / 100.0, color.alphaF() );
else if ( part.compare( QLatin1String( "hsl_hue" ), Qt::CaseInsensitive ) == 0 )
color.setHsl( value, color.hslSaturation(), color.lightness(), color.alpha() );
else if ( part.compare( QLatin1String( "hsl_saturation" ), Qt::CaseInsensitive ) == 0 )
color.setHslF( color.hslHueF(), value / 100.0, color.lightnessF(), color.alphaF() );
else if ( part.compare( QLatin1String( "lightness" ), Qt::CaseInsensitive ) == 0 )
color.setHslF( color.hslHueF(), color.hslSaturationF(), value / 100.0, color.alphaF() );
else if ( part.compare( QLatin1String( "cyan" ), Qt::CaseInsensitive ) == 0 )
color.setCmykF( value / 100.0, color.magentaF(), color.yellowF(), color.blackF(), color.alphaF() );
else if ( part.compare( QLatin1String( "magenta" ), Qt::CaseInsensitive ) == 0 )
color.setCmykF( color.cyanF(), value / 100.0, color.yellowF(), color.blackF(), color.alphaF() );
else if ( part.compare( QLatin1String( "yellow" ), Qt::CaseInsensitive ) == 0 )
color.setCmykF( color.cyanF(), color.magentaF(), value / 100.0, color.blackF(), color.alphaF() );
else if ( part.compare( QLatin1String( "black" ), Qt::CaseInsensitive ) == 0 )
color.setCmykF( color.cyanF(), color.magentaF(), color.yellowF(), value / 100.0, color.alphaF() );
else
{
parent->setEvalErrorString( QObject::tr( "Unknown color component '%1'" ).arg( part ) );
return QVariant();
}
return QgsSymbolLayerUtils::encodeColor( color );
}
static QVariant fncDarker( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QColor color = QgsSymbolLayerUtils::decodeColor( values.at( 0 ).toString() );
if ( ! color.isValid() )
{
parent->setEvalErrorString( QObject::tr( "Cannot convert '%1' to color" ).arg( values.at( 0 ).toString() ) );
return QVariant();
}
color = color.darker( QgsExpressionUtils::getIntValue( values.at( 1 ), parent ) );
return QgsSymbolLayerUtils::encodeColor( color );
}
static QVariant fncLighter( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QColor color = QgsSymbolLayerUtils::decodeColor( values.at( 0 ).toString() );
if ( ! color.isValid() )
{
parent->setEvalErrorString( QObject::tr( "Cannot convert '%1' to color" ).arg( values.at( 0 ).toString() ) );
return QVariant();
}
color = color.lighter( QgsExpressionUtils::getIntValue( values.at( 1 ), parent ) );
return QgsSymbolLayerUtils::encodeColor( color );
}
static QVariant fcnGetGeometry( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsFeature feat = QgsExpressionUtils::getFeature( values.at( 0 ), parent );
QgsGeometry geom = feat.geometry();
if ( !geom.isNull() )
return QVariant::fromValue( geom );
return QVariant();
}
static QVariant fcnTransformGeometry( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsGeometry fGeom = QgsExpressionUtils::getGeometry( values.at( 0 ), parent );
QString sAuthId = QgsExpressionUtils::getStringValue( values.at( 1 ), parent );
QString dAuthId = QgsExpressionUtils::getStringValue( values.at( 2 ), parent );
QgsCoordinateReferenceSystem s = QgsCoordinateReferenceSystem::fromOgcWmsCrs( sAuthId );
if ( ! s.isValid() )
return QVariant::fromValue( fGeom );
QgsCoordinateReferenceSystem d = QgsCoordinateReferenceSystem::fromOgcWmsCrs( dAuthId );
if ( ! d.isValid() )
return QVariant::fromValue( fGeom );
Q_NOWARN_DEPRECATED_PUSH
QgsCoordinateTransform t( s, d );
Q_NOWARN_DEPRECATED_POP
try
{
if ( fGeom.transform( t ) == 0 )
return QVariant::fromValue( fGeom );
}
catch ( QgsCsException &cse )
{
QgsMessageLog::logMessage( QObject::tr( "Transform error caught in transform() function: %1" ).arg( cse.what() ) );
return QVariant();
}
return QVariant();
}
static QVariant fcnGetFeatureById( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariant result;
QgsVectorLayer *vl = QgsExpressionUtils::getVectorLayer( values.at( 0 ), parent );
if ( vl )
{
QgsFeatureId fid = QgsExpressionUtils::getIntValue( values.at( 1 ), parent );
QgsFeatureRequest req;
req.setFilterFid( fid );
req.setTimeout( 10000 );
req.setRequestMayBeNested( true );
QgsFeatureIterator fIt = vl->getFeatures( req );
QgsFeature fet;
if ( fIt.nextFeature( fet ) )
result = QVariant::fromValue( fet );
}
return result;
}
static QVariant fcnGetFeature( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
//arguments: 1. layer id / name, 2. key attribute, 3. eq value
std::unique_ptr<QgsVectorLayerFeatureSource> featureSource = QgsExpressionUtils::getFeatureSource( values.at( 0 ), parent );
//no layer found
if ( !featureSource )
{
return QVariant();
}
QString attribute = QgsExpressionUtils::getStringValue( values.at( 1 ), parent );
int attributeId = featureSource->fields().lookupField( attribute );
if ( attributeId == -1 )
{
return QVariant();
}
const QVariant &attVal = values.at( 2 );
const QString cacheValueKey = QStringLiteral( "getfeature:%1:%2:%3" ).arg( featureSource->id(), QString::number( attributeId ), attVal.toString() );
if ( context && context->hasCachedValue( cacheValueKey ) )
{
return context->cachedValue( cacheValueKey );
}
QgsFeatureRequest req;
req.setFilterExpression( QStringLiteral( "%1=%2" ).arg( QgsExpression::quotedColumnRef( attribute ),
QgsExpression::quotedString( attVal.toString() ) ) );
req.setLimit( 1 );
req.setTimeout( 10000 );
req.setRequestMayBeNested( true );
if ( !parent->needsGeometry() )
{
req.setFlags( QgsFeatureRequest::NoGeometry );
}
QgsFeatureIterator fIt = featureSource->getFeatures( req );
QgsFeature fet;
QVariant res;
if ( fIt.nextFeature( fet ) )
{
res = QVariant::fromValue( fet );
}
if ( context )
context->setCachedValue( cacheValueKey, res );
return res;
}
static QVariant fcnRepresentValue( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction *node )
{
QVariant result;
QString fieldName;
if ( context )
{
if ( !values.isEmpty() )
{
QgsExpressionNodeColumnRef *col = dynamic_cast<QgsExpressionNodeColumnRef *>( node->args()->at( 0 ) );
if ( col && ( values.size() == 1 || !values.at( 1 ).isValid() ) )
fieldName = col->name();
else if ( values.size() == 2 )
fieldName = QgsExpressionUtils::getStringValue( values.at( 1 ), parent );
}
QVariant value = values.at( 0 );
const QgsFields fields = context->fields();
int fieldIndex = fields.lookupField( fieldName );
if ( fieldIndex == -1 )
{
parent->setEvalErrorString( QCoreApplication::translate( "expression", "%1: Field not found %2" ).arg( QStringLiteral( "represent_value" ), fieldName ) );
}
else
{
QgsVectorLayer *layer = QgsExpressionUtils::getVectorLayer( context->variable( QStringLiteral( "layer" ) ), parent );
const QString cacheValueKey = QStringLiteral( "repvalfcnval:%1:%2:%3" ).arg( layer ? layer->id() : QStringLiteral( "[None]" ), fieldName, value.toString() );
if ( context->hasCachedValue( cacheValueKey ) )
{
return context->cachedValue( cacheValueKey );
}
const QgsEditorWidgetSetup setup = fields.at( fieldIndex ).editorWidgetSetup();
const QgsFieldFormatter *formatter = QgsApplication::fieldFormatterRegistry()->fieldFormatter( setup.type() );
const QString cacheKey = QStringLiteral( "repvalfcn:%1:%2" ).arg( layer ? layer->id() : QStringLiteral( "[None]" ), fieldName );
QVariant cache;
if ( !context->hasCachedValue( cacheKey ) )
{
cache = formatter->createCache( layer, fieldIndex, setup.config() );
context->setCachedValue( cacheKey, cache );
}
else
cache = context->cachedValue( cacheKey );
result = formatter->representValue( layer, fieldIndex, setup.config(), cache, value );
context->setCachedValue( cacheValueKey, result );
}
}
else
{
parent->setEvalErrorString( QCoreApplication::translate( "expression", "%1: function cannot be evaluated without a context." ).arg( QStringLiteral( "represent_value" ), fieldName ) );
}
return result;
}
static QVariant fcnGetLayerProperty( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QgsMapLayer *layer = QgsExpressionUtils::getMapLayer( values.at( 0 ), parent );
if ( !layer )
return QVariant();
QString layerProperty = QgsExpressionUtils::getStringValue( values.at( 1 ), parent );
if ( QString::compare( layerProperty, QStringLiteral( "name" ), Qt::CaseInsensitive ) == 0 )
return layer->name();
else if ( QString::compare( layerProperty, QStringLiteral( "id" ), Qt::CaseInsensitive ) == 0 )
return layer->id();
else if ( QString::compare( layerProperty, QStringLiteral( "title" ), Qt::CaseInsensitive ) == 0 )
return layer->title();
else if ( QString::compare( layerProperty, QStringLiteral( "abstract" ), Qt::CaseInsensitive ) == 0 )
return layer->abstract();
else if ( QString::compare( layerProperty, QStringLiteral( "keywords" ), Qt::CaseInsensitive ) == 0 )
return layer->keywordList();
else if ( QString::compare( layerProperty, QStringLiteral( "data_url" ), Qt::CaseInsensitive ) == 0 )
return layer->dataUrl();
else if ( QString::compare( layerProperty, QStringLiteral( "attribution" ), Qt::CaseInsensitive ) == 0 )
return layer->attribution();
else if ( QString::compare( layerProperty, QStringLiteral( "attribution_url" ), Qt::CaseInsensitive ) == 0 )
return layer->attributionUrl();
else if ( QString::compare( layerProperty, QStringLiteral( "source" ), Qt::CaseInsensitive ) == 0 )
return layer->publicSource();
else if ( QString::compare( layerProperty, QStringLiteral( "min_scale" ), Qt::CaseInsensitive ) == 0 )
return layer->minimumScale();
else if ( QString::compare( layerProperty, QStringLiteral( "max_scale" ), Qt::CaseInsensitive ) == 0 )
return layer->maximumScale();
else if ( QString::compare( layerProperty, QStringLiteral( "crs" ), Qt::CaseInsensitive ) == 0 )
return layer->crs().authid();
else if ( QString::compare( layerProperty, QStringLiteral( "crs_definition" ), Qt::CaseInsensitive ) == 0 )
return layer->crs().toProj4();
else if ( QString::compare( layerProperty, QStringLiteral( "crs_description" ), Qt::CaseInsensitive ) == 0 )
return layer->crs().description();
else if ( QString::compare( layerProperty, QStringLiteral( "extent" ), Qt::CaseInsensitive ) == 0 )
{
QgsGeometry extentGeom = QgsGeometry::fromRect( layer->extent() );
QVariant result = QVariant::fromValue( extentGeom );
return result;
}
else if ( QString::compare( layerProperty, QStringLiteral( "type" ), Qt::CaseInsensitive ) == 0 )
{
switch ( layer->type() )
{
case QgsMapLayer::VectorLayer:
return QCoreApplication::translate( "expressions", "Vector" );
case QgsMapLayer::RasterLayer:
return QCoreApplication::translate( "expressions", "Raster" );
case QgsMapLayer::MeshLayer:
return QCoreApplication::translate( "expressions", "Mesh" );
case QgsMapLayer::PluginLayer:
return QCoreApplication::translate( "expressions", "Plugin" );
}
}
else
{
//vector layer methods
QgsVectorLayer *vLayer = qobject_cast< QgsVectorLayer * >( layer );
if ( vLayer )
{
if ( QString::compare( layerProperty, QStringLiteral( "storage_type" ), Qt::CaseInsensitive ) == 0 )
return vLayer->storageType();
else if ( QString::compare( layerProperty, QStringLiteral( "geometry_type" ), Qt::CaseInsensitive ) == 0 )
return QgsWkbTypes::geometryDisplayString( vLayer->geometryType() );
else if ( QString::compare( layerProperty, QStringLiteral( "feature_count" ), Qt::CaseInsensitive ) == 0 )
return QVariant::fromValue( vLayer->featureCount() );
}
}
return QVariant();
}
static QVariant fcnGetRasterBandStat( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QString layerIdOrName = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
//try to find a matching layer by name
QgsMapLayer *layer = QgsProject::instance()->mapLayer( layerIdOrName ); //search by id first
if ( !layer )
{
QList<QgsMapLayer *> layersByName = QgsProject::instance()->mapLayersByName( layerIdOrName );
if ( !layersByName.isEmpty() )
{
layer = layersByName.at( 0 );
}
}
if ( !layer )
return QVariant();
QgsRasterLayer *rl = qobject_cast< QgsRasterLayer * >( layer );
if ( !rl )
return QVariant();
int band = QgsExpressionUtils::getIntValue( values.at( 1 ), parent );
if ( band < 1 || band > rl->bandCount() )
{
parent->setEvalErrorString( QObject::tr( "Invalid band number %1 for layer %2" ).arg( band ).arg( layerIdOrName ) );
return QVariant();
}
QString layerProperty = QgsExpressionUtils::getStringValue( values.at( 2 ), parent );
int stat = 0;
if ( QString::compare( layerProperty, QStringLiteral( "avg" ), Qt::CaseInsensitive ) == 0 )
stat = QgsRasterBandStats::Mean;
else if ( QString::compare( layerProperty, QStringLiteral( "stdev" ), Qt::CaseInsensitive ) == 0 )
stat = QgsRasterBandStats::StdDev;
else if ( QString::compare( layerProperty, QStringLiteral( "min" ), Qt::CaseInsensitive ) == 0 )
stat = QgsRasterBandStats::Min;
else if ( QString::compare( layerProperty, QStringLiteral( "max" ), Qt::CaseInsensitive ) == 0 )
stat = QgsRasterBandStats::Max;
else if ( QString::compare( layerProperty, QStringLiteral( "range" ), Qt::CaseInsensitive ) == 0 )
stat = QgsRasterBandStats::Range;
else if ( QString::compare( layerProperty, QStringLiteral( "sum" ), Qt::CaseInsensitive ) == 0 )
stat = QgsRasterBandStats::Sum;
else
{
parent->setEvalErrorString( QObject::tr( "Invalid raster statistic: '%1'" ).arg( layerProperty ) );
return QVariant();
}
QgsRasterBandStats stats = rl->dataProvider()->bandStatistics( band, stat );
switch ( stat )
{
case QgsRasterBandStats::Mean:
return stats.mean;
case QgsRasterBandStats::StdDev:
return stats.stdDev;
case QgsRasterBandStats::Min:
return stats.minimumValue;
case QgsRasterBandStats::Max:
return stats.maximumValue;
case QgsRasterBandStats::Range:
return stats.range;
case QgsRasterBandStats::Sum:
return stats.sum;
}
return QVariant();
}
static QVariant fcnArray( const QVariantList &values, const QgsExpressionContext *, QgsExpression *, const QgsExpressionNodeFunction * )
{
return values;
}
static QVariant fcnArrayLength( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return QgsExpressionUtils::getListValue( values.at( 0 ), parent ).length();
}
static QVariant fcnArrayContains( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return QVariant( QgsExpressionUtils::getListValue( values.at( 0 ), parent ).contains( values.at( 1 ) ) );
}
static QVariant fcnArrayFind( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return QgsExpressionUtils::getListValue( values.at( 0 ), parent ).indexOf( values.at( 1 ) );
}
static QVariant fcnArrayGet( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
const QVariantList list = QgsExpressionUtils::getListValue( values.at( 0 ), parent );
const qlonglong pos = QgsExpressionUtils::getIntValue( values.at( 1 ), parent );
if ( pos < 0 || pos >= list.length() ) return QVariant();
return list.at( pos );
}
static QVariant fcnArrayFirst( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
const QVariantList list = QgsExpressionUtils::getListValue( values.at( 0 ), parent );
return list.value( 0 );
}
static QVariant fcnArrayLast( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
const QVariantList list = QgsExpressionUtils::getListValue( values.at( 0 ), parent );
return list.value( list.size() - 1 );
}
static QVariant convertToSameType( const QVariant &value, QVariant::Type type )
{
QVariant result = value;
result.convert( type );
return result;
}
static QVariant fcnArrayAppend( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariantList list = QgsExpressionUtils::getListValue( values.at( 0 ), parent );
list.append( values.at( 1 ) );
return convertToSameType( list, values.at( 0 ).type() );
}
static QVariant fcnArrayPrepend( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariantList list = QgsExpressionUtils::getListValue( values.at( 0 ), parent );
list.prepend( values.at( 1 ) );
return convertToSameType( list, values.at( 0 ).type() );
}
static QVariant fcnArrayInsert( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariantList list = QgsExpressionUtils::getListValue( values.at( 0 ), parent );
list.insert( QgsExpressionUtils::getIntValue( values.at( 1 ), parent ), values.at( 2 ) );
return convertToSameType( list, values.at( 0 ).type() );
}
static QVariant fcnArrayRemoveAt( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariantList list = QgsExpressionUtils::getListValue( values.at( 0 ), parent );
list.removeAt( QgsExpressionUtils::getIntValue( values.at( 1 ), parent ) );
return convertToSameType( list, values.at( 0 ).type() );
}
static QVariant fcnArrayRemoveAll( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariantList list = QgsExpressionUtils::getListValue( values.at( 0 ), parent );
list.removeAll( values.at( 1 ) );
return convertToSameType( list, values.at( 0 ).type() );
}
static QVariant fcnArrayCat( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariantList list;
for ( const QVariant &cur : values )
{
list += QgsExpressionUtils::getListValue( cur, parent );
}
return convertToSameType( list, values.at( 0 ).type() );
}
static QVariant fcnArraySlice( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariantList list = QgsExpressionUtils::getListValue( values.at( 0 ), parent );
qlonglong start_pos = QgsExpressionUtils::getIntValue( values.at( 1 ), parent );
const qlonglong end_pos = QgsExpressionUtils::getIntValue( values.at( 2 ), parent );
qlonglong slice_length = 0;
// negative positions means positions taken relative to the end of the array
if ( start_pos < 0 )
{
start_pos = list.length() + start_pos;
}
if ( end_pos >= 0 )
{
slice_length = end_pos - start_pos + 1;
}
else
{
slice_length = list.length() + end_pos - start_pos + 1;
}
//avoid negative lengths in QList.mid function
if ( slice_length < 0 )
{
slice_length = 0;
}
list = list.mid( start_pos, slice_length );
return list;
}
static QVariant fcnArrayReverse( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariantList list = QgsExpressionUtils::getListValue( values.at( 0 ), parent );
std::reverse( list.begin(), list.end() );
return list;
}
static QVariant fcnArrayIntersect( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
const QVariantList array1 = QgsExpressionUtils::getListValue( values.at( 0 ), parent );
const QVariantList array2 = QgsExpressionUtils::getListValue( values.at( 1 ), parent );
for ( const QVariant &cur : array2 )
{
if ( array1.contains( cur ) )
return QVariant( true );
}
return QVariant( false );
}
static QVariant fcnArrayDistinct( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariantList array = QgsExpressionUtils::getListValue( values.at( 0 ), parent );
QVariantList distinct;
for ( QVariantList::const_iterator it = array.constBegin(); it != array.constEnd(); ++it )
{
if ( !distinct.contains( *it ) )
{
distinct += ( *it );
}
}
return distinct;
}
static QVariant fcnArrayToString( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariantList array = QgsExpressionUtils::getListValue( values.at( 0 ), parent );
QString delimiter = QgsExpressionUtils::getStringValue( values.at( 1 ), parent );
QString empty = QgsExpressionUtils::getStringValue( values.at( 2 ), parent );
QString str;
for ( QVariantList::const_iterator it = array.constBegin(); it != array.constEnd(); ++it )
{
str += ( !( *it ).toString().isEmpty() ) ? ( *it ).toString() : empty;
if ( it != ( array.constEnd() - 1 ) )
{
str += delimiter;
}
}
return QVariant( str );
}
static QVariant fcnStringToArray( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QString str = QgsExpressionUtils::getStringValue( values.at( 0 ), parent );
QString delimiter = QgsExpressionUtils::getStringValue( values.at( 1 ), parent );
QString empty = QgsExpressionUtils::getStringValue( values.at( 2 ), parent );
QStringList list = str.split( delimiter );
QVariantList array;
for ( QStringList::const_iterator it = list.constBegin(); it != list.constEnd(); ++it )
{
array += ( !( *it ).isEmpty() ) ? *it : empty;
}
return array;
}
static QVariant fcnMap( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariantMap result;
for ( int i = 0; i + 1 < values.length(); i += 2 )
{
result.insert( QgsExpressionUtils::getStringValue( values.at( i ), parent ), values.at( i + 1 ) );
}
return result;
}
static QVariant fcnMapGet( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return QgsExpressionUtils::getMapValue( values.at( 0 ), parent ).value( values.at( 1 ).toString() );
}
static QVariant fcnMapExist( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return QgsExpressionUtils::getMapValue( values.at( 0 ), parent ).contains( values.at( 1 ).toString() );
}
static QVariant fcnMapDelete( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariantMap map = QgsExpressionUtils::getMapValue( values.at( 0 ), parent );
map.remove( values.at( 1 ).toString() );
return map;
}
static QVariant fcnMapInsert( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariantMap map = QgsExpressionUtils::getMapValue( values.at( 0 ), parent );
map.insert( values.at( 1 ).toString(), values.at( 2 ) );
return map;
}
static QVariant fcnMapConcat( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
QVariantMap result;
for ( const QVariant &cur : values )
{
const QVariantMap curMap = QgsExpressionUtils::getMapValue( cur, parent );
for ( QVariantMap::const_iterator it = curMap.constBegin(); it != curMap.constEnd(); ++it )
result.insert( it.key(), it.value() );
}
return result;
}
static QVariant fcnMapAKeys( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return QStringList( QgsExpressionUtils::getMapValue( values.at( 0 ), parent ).keys() );
}
static QVariant fcnMapAVals( const QVariantList &values, const QgsExpressionContext *, QgsExpression *parent, const QgsExpressionNodeFunction * )
{
return QgsExpressionUtils::getMapValue( values.at( 0 ), parent ).values();
}
static QVariant fcnEnvVar( const QVariantList &values, const QgsExpressionContext *, QgsExpression *, const QgsExpressionNodeFunction * )
{
QString envVarName = values.at( 0 ).toString();
return QProcessEnvironment::systemEnvironment().value( envVarName );
}
const QList<QgsExpressionFunction *> &QgsExpression::Functions()
{
// The construction of the list isn't thread-safe, and without the mutex,
// crashes in the WFS provider may occur, since it can parse expressions
// in parallel.
// The mutex needs to be recursive.
static QMutex sFunctionsMutex( QMutex::Recursive );
QMutexLocker locker( &sFunctionsMutex );
if ( sFunctions.isEmpty() )
{
QgsExpressionFunction::ParameterList aggParams = QgsExpressionFunction::ParameterList()
<< QgsExpressionFunction::Parameter( QStringLiteral( "expression" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "group_by" ), true )
<< QgsExpressionFunction::Parameter( QStringLiteral( "filter" ), true );
sFunctions
<< new QgsStaticExpressionFunction( QStringLiteral( "sqrt" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ), fcnSqrt, QStringLiteral( "Math" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "radians" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "degrees" ) ), fcnRadians, QStringLiteral( "Math" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "degrees" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "radians" ) ), fcnDegrees, QStringLiteral( "Math" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "azimuth" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "point_a" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "point_b" ) ), fcnAzimuth, QStringList() << QStringLiteral( "Math" ) << QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "inclination" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "point_a" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "point_b" ) ), fcnInclination, QStringList() << QStringLiteral( "Math" ) << QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "project" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "point" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "distance" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "azimuth" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "elevation" ), true, M_PI_2 ), fcnProject, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "abs" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ), fcnAbs, QStringLiteral( "Math" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "cos" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "angle" ) ), fcnCos, QStringLiteral( "Math" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "sin" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "angle" ) ), fcnSin, QStringLiteral( "Math" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "tan" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "angle" ) ), fcnTan, QStringLiteral( "Math" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "asin" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ), fcnAsin, QStringLiteral( "Math" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "acos" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ), fcnAcos, QStringLiteral( "Math" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "atan" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ), fcnAtan, QStringLiteral( "Math" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "atan2" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "dx" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "dy" ) ), fcnAtan2, QStringLiteral( "Math" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "exp" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ), fcnExp, QStringLiteral( "Math" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "ln" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ), fcnLn, QStringLiteral( "Math" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "log10" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ), fcnLog10, QStringLiteral( "Math" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "log" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "base" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ), fcnLog, QStringLiteral( "Math" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "round" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "places" ), true, 0 ), fcnRound, QStringLiteral( "Math" ) );
QgsStaticExpressionFunction *randFunc = new QgsStaticExpressionFunction( QStringLiteral( "rand" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "min" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "max" ) ), fcnRnd, QStringLiteral( "Math" ) );
randFunc->setIsStatic( false );
sFunctions << randFunc;
QgsStaticExpressionFunction *randfFunc = new QgsStaticExpressionFunction( QStringLiteral( "randf" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "min" ), true, 0.0 ) << QgsExpressionFunction::Parameter( QStringLiteral( "max" ), true, 1.0 ), fcnRndF, QStringLiteral( "Math" ) );
randfFunc->setIsStatic( false );
sFunctions << randfFunc;
sFunctions
<< new QgsStaticExpressionFunction( QStringLiteral( "max" ), -1, fcnMax, QStringLiteral( "Math" ), QString(), false, QSet<QString>(), false, QStringList(), /* handlesNull = */ true )
<< new QgsStaticExpressionFunction( QStringLiteral( "min" ), -1, fcnMin, QStringLiteral( "Math" ), QString(), false, QSet<QString>(), false, QStringList(), /* handlesNull = */ true )
<< new QgsStaticExpressionFunction( QStringLiteral( "clamp" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "min" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "max" ) ), fcnClamp, QStringLiteral( "Math" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "scale_linear" ), 5, fcnLinearScale, QStringLiteral( "Math" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "scale_exp" ), 6, fcnExpScale, QStringLiteral( "Math" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "floor" ), 1, fcnFloor, QStringLiteral( "Math" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "ceil" ), 1, fcnCeil, QStringLiteral( "Math" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "pi" ), 0, fcnPi, QStringLiteral( "Math" ), QString(), false, QSet<QString>(), false, QStringList() << QStringLiteral( "$pi" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "to_int" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ), fcnToInt, QStringLiteral( "Conversions" ), QString(), false, QSet<QString>(), false, QStringList() << QStringLiteral( "toint" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "to_real" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ), fcnToReal, QStringLiteral( "Conversions" ), QString(), false, QSet<QString>(), false, QStringList() << QStringLiteral( "toreal" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "to_string" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ), fcnToString, QStringList() << QStringLiteral( "Conversions" ) << QStringLiteral( "String" ), QString(), false, QSet<QString>(), false, QStringList() << QStringLiteral( "tostring" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "to_datetime" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ), fcnToDateTime, QStringList() << QStringLiteral( "Conversions" ) << QStringLiteral( "Date and Time" ), QString(), false, QSet<QString>(), false, QStringList() << QStringLiteral( "todatetime" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "to_date" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ), fcnToDate, QStringList() << QStringLiteral( "Conversions" ) << QStringLiteral( "Date and Time" ), QString(), false, QSet<QString>(), false, QStringList() << QStringLiteral( "todate" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "to_time" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ), fcnToTime, QStringList() << QStringLiteral( "Conversions" ) << QStringLiteral( "Date and Time" ), QString(), false, QSet<QString>(), false, QStringList() << QStringLiteral( "totime" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "to_interval" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ), fcnToInterval, QStringList() << QStringLiteral( "Conversions" ) << QStringLiteral( "Date and Time" ), QString(), false, QSet<QString>(), false, QStringList() << QStringLiteral( "tointerval" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "coalesce" ), -1, fcnCoalesce, QStringLiteral( "Conditionals" ), QString(), false, QSet<QString>(), false, QStringList(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "if" ), 3, fcnIf, QStringLiteral( "Conditionals" ), QString(), false, QSet<QString>(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "aggregate" ),
QgsExpressionFunction::ParameterList()
<< QgsExpressionFunction::Parameter( QStringLiteral( "layer" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "aggregate" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "expression" ), false, QVariant(), true )
<< QgsExpressionFunction::Parameter( QStringLiteral( "filter" ), true, QVariant(), true )
<< QgsExpressionFunction::Parameter( QStringLiteral( "concatenator" ), true ),
fcnAggregate,
QStringLiteral( "Aggregates" ),
QString(),
[]( const QgsExpressionNodeFunction * node )
{
// usesGeometry callback: return true if @parent variable is referenced
if ( !node )
return true;
if ( !node->args() )
return false;
QSet<QString> referencedVars;
if ( node->args()->count() > 2 )
{
QgsExpressionNode *subExpressionNode = node->args()->at( 2 );
referencedVars = subExpressionNode->referencedVariables();
}
if ( node->args()->count() > 3 )
{
QgsExpressionNode *filterNode = node->args()->at( 3 );
referencedVars.unite( filterNode->referencedVariables() );
}
return referencedVars.contains( QStringLiteral( "parent" ) ) || referencedVars.contains( QString() );
},
[]( const QgsExpressionNodeFunction * node )
{
// referencedColumns callback: return AllAttributes if @parent variable is referenced
if ( !node )
return QSet<QString>() << QgsFeatureRequest::ALL_ATTRIBUTES;
if ( !node->args() )
return QSet<QString>();
QSet<QString> referencedCols;
QSet<QString> referencedVars;
if ( node->args()->count() > 2 )
{
QgsExpressionNode *subExpressionNode = node->args()->at( 2 );
referencedVars = subExpressionNode->referencedVariables();
referencedCols = subExpressionNode->referencedColumns();
}
if ( node->args()->count() > 3 )
{
QgsExpressionNode *filterNode = node->args()->at( 3 );
referencedVars = filterNode->referencedVariables();
referencedCols.unite( filterNode->referencedColumns() );
}
if ( referencedVars.contains( QStringLiteral( "parent" ) ) || referencedVars.contains( QString() ) )
return QSet<QString>() << QgsFeatureRequest::ALL_ATTRIBUTES;
else
return referencedCols;
},
true
)
<< new QgsStaticExpressionFunction( QStringLiteral( "relation_aggregate" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "relation" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "aggregate" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "expression" ), false, QVariant(), true ) << QgsExpressionFunction::Parameter( QStringLiteral( "concatenator" ), true ),
fcnAggregateRelation, QStringLiteral( "Aggregates" ), QString(), false, QSet<QString>() << QgsFeatureRequest::ALL_ATTRIBUTES, true )
<< new QgsStaticExpressionFunction( QStringLiteral( "count" ), aggParams, fcnAggregateCount, QStringLiteral( "Aggregates" ), QString(), false, QSet<QString>(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "count_distinct" ), aggParams, fcnAggregateCountDistinct, QStringLiteral( "Aggregates" ), QString(), false, QSet<QString>(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "count_missing" ), aggParams, fcnAggregateCountMissing, QStringLiteral( "Aggregates" ), QString(), false, QSet<QString>(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "minimum" ), aggParams, fcnAggregateMin, QStringLiteral( "Aggregates" ), QString(), false, QSet<QString>(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "maximum" ), aggParams, fcnAggregateMax, QStringLiteral( "Aggregates" ), QString(), false, QSet<QString>(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "sum" ), aggParams, fcnAggregateSum, QStringLiteral( "Aggregates" ), QString(), false, QSet<QString>(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "mean" ), aggParams, fcnAggregateMean, QStringLiteral( "Aggregates" ), QString(), false, QSet<QString>(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "median" ), aggParams, fcnAggregateMedian, QStringLiteral( "Aggregates" ), QString(), false, QSet<QString>(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "stdev" ), aggParams, fcnAggregateStdev, QStringLiteral( "Aggregates" ), QString(), false, QSet<QString>(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "range" ), aggParams, fcnAggregateRange, QStringLiteral( "Aggregates" ), QString(), false, QSet<QString>(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "minority" ), aggParams, fcnAggregateMinority, QStringLiteral( "Aggregates" ), QString(), false, QSet<QString>(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "majority" ), aggParams, fcnAggregateMajority, QStringLiteral( "Aggregates" ), QString(), false, QSet<QString>(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "q1" ), aggParams, fcnAggregateQ1, QStringLiteral( "Aggregates" ), QString(), false, QSet<QString>(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "q3" ), aggParams, fcnAggregateQ3, QStringLiteral( "Aggregates" ), QString(), false, QSet<QString>(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "iqr" ), aggParams, fcnAggregateIQR, QStringLiteral( "Aggregates" ), QString(), false, QSet<QString>(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "min_length" ), aggParams, fcnAggregateMinLength, QStringLiteral( "Aggregates" ), QString(), false, QSet<QString>(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "max_length" ), aggParams, fcnAggregateMaxLength, QStringLiteral( "Aggregates" ), QString(), false, QSet<QString>(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "collect" ), aggParams, fcnAggregateCollectGeometry, QStringLiteral( "Aggregates" ), QString(), false, QSet<QString>(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "concatenate" ), aggParams << QgsExpressionFunction::Parameter( QStringLiteral( "concatenator" ), true ), fcnAggregateStringConcat, QStringLiteral( "Aggregates" ), QString(), false, QSet<QString>(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "array_agg" ), aggParams, fcnAggregateArray, QStringLiteral( "Aggregates" ), QString(), false, QSet<QString>(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "regexp_match" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "string" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "regex" ) ), fcnRegexpMatch, QStringList() << QStringLiteral( "Conditionals" ) << QStringLiteral( "String" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "regexp_matches" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "string" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "regex" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "emptyvalue" ), true, "" ), fcnRegexpMatches, QStringLiteral( "Arrays" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "now" ), 0, fcnNow, QStringLiteral( "Date and Time" ), QString(), false, QSet<QString>(), false, QStringList() << QStringLiteral( "$now" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "age" ), 2, fcnAge, QStringLiteral( "Date and Time" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "year" ), 1, fcnYear, QStringLiteral( "Date and Time" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "month" ), 1, fcnMonth, QStringLiteral( "Date and Time" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "week" ), 1, fcnWeek, QStringLiteral( "Date and Time" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "day" ), 1, fcnDay, QStringLiteral( "Date and Time" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "hour" ), 1, fcnHour, QStringLiteral( "Date and Time" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "minute" ), 1, fcnMinute, QStringLiteral( "Date and Time" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "second" ), 1, fcnSeconds, QStringLiteral( "Date and Time" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "epoch" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "date" ) ), fcnEpoch, QStringLiteral( "Date and Time" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "day_of_week" ), 1, fcnDayOfWeek, QStringLiteral( "Date and Time" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "lower" ), 1, fcnLower, QStringLiteral( "String" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "upper" ), 1, fcnUpper, QStringLiteral( "String" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "title" ), 1, fcnTitle, QStringLiteral( "String" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "trim" ), 1, fcnTrim, QStringLiteral( "String" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "levenshtein" ), 2, fcnLevenshtein, QStringLiteral( "Fuzzy Matching" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "longest_common_substring" ), 2, fcnLCS, QStringLiteral( "Fuzzy Matching" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "hamming_distance" ), 2, fcnHamming, QStringLiteral( "Fuzzy Matching" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "soundex" ), 1, fcnSoundex, QStringLiteral( "Fuzzy Matching" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "char" ), 1, fcnChar, QStringLiteral( "String" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "wordwrap" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "text" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "length" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "delimiter" ), true, "" ), fcnWordwrap, QStringLiteral( "String" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "length" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "text" ), true, "" ), fcnLength, QStringList() << QStringLiteral( "String" ) << QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "replace" ), -1, fcnReplace, QStringLiteral( "String" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "regexp_replace" ), 3, fcnRegexpReplace, QStringLiteral( "String" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "regexp_substr" ), 2, fcnRegexpSubstr, QStringLiteral( "String" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "substr" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "string" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "start " ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "length" ), true ), fcnSubstr, QStringLiteral( "String" ), QString(),
false, QSet< QString >(), false, QStringList(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "concat" ), -1, fcnConcat, QStringLiteral( "String" ), QString(), false, QSet<QString>(), false, QStringList(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "strpos" ), 2, fcnStrpos, QStringLiteral( "String" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "left" ), 2, fcnLeft, QStringLiteral( "String" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "right" ), 2, fcnRight, QStringLiteral( "String" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "rpad" ), 3, fcnRPad, QStringLiteral( "String" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "lpad" ), 3, fcnLPad, QStringLiteral( "String" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "format" ), -1, fcnFormatString, QStringLiteral( "String" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "format_number" ), 2, fcnFormatNumber, QStringLiteral( "String" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "format_date" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "date" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "format" ) ), fcnFormatDate, QStringList() << QStringLiteral( "String" ) << QStringLiteral( "Date and Time" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "color_grayscale_average" ), 1, fcnColorGrayscaleAverage, QStringLiteral( "Color" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "color_mix_rgb" ), 3, fcnColorMixRgb, QStringLiteral( "Color" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "color_rgb" ), 3, fcnColorRgb, QStringLiteral( "Color" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "color_rgba" ), 4, fncColorRgba, QStringLiteral( "Color" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "ramp_color" ), 2, fcnRampColor, QStringLiteral( "Color" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "create_ramp" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "map" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "discrete" ), true, false ), fcnCreateRamp, QStringLiteral( "Color" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "color_hsl" ), 3, fcnColorHsl, QStringLiteral( "Color" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "color_hsla" ), 4, fncColorHsla, QStringLiteral( "Color" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "color_hsv" ), 3, fcnColorHsv, QStringLiteral( "Color" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "color_hsva" ), 4, fncColorHsva, QStringLiteral( "Color" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "color_cmyk" ), 4, fcnColorCmyk, QStringLiteral( "Color" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "color_cmyka" ), 5, fncColorCmyka, QStringLiteral( "Color" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "color_part" ), 2, fncColorPart, QStringLiteral( "Color" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "darker" ), 2, fncDarker, QStringLiteral( "Color" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "lighter" ), 2, fncLighter, QStringLiteral( "Color" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "set_color_part" ), 3, fncSetColorPart, QStringLiteral( "Color" ) );
QgsStaticExpressionFunction *geomFunc = new QgsStaticExpressionFunction( QStringLiteral( "$geometry" ), 0, fcnGeometry, QStringLiteral( "GeometryGroup" ), QString(), true );
geomFunc->setIsStatic( false );
sFunctions << geomFunc;
QgsStaticExpressionFunction *areaFunc = new QgsStaticExpressionFunction( QStringLiteral( "$area" ), 0, fcnGeomArea, QStringLiteral( "GeometryGroup" ), QString(), true );
areaFunc->setIsStatic( false );
sFunctions << areaFunc;
sFunctions << new QgsStaticExpressionFunction( QStringLiteral( "area" ), 1, fcnArea, QStringLiteral( "GeometryGroup" ) );
QgsStaticExpressionFunction *lengthFunc = new QgsStaticExpressionFunction( QStringLiteral( "$length" ), 0, fcnGeomLength, QStringLiteral( "GeometryGroup" ), QString(), true );
lengthFunc->setIsStatic( false );
sFunctions << lengthFunc;
QgsStaticExpressionFunction *perimeterFunc = new QgsStaticExpressionFunction( QStringLiteral( "$perimeter" ), 0, fcnGeomPerimeter, QStringLiteral( "GeometryGroup" ), QString(), true );
perimeterFunc->setIsStatic( false );
sFunctions << perimeterFunc;
sFunctions << new QgsStaticExpressionFunction( QStringLiteral( "perimeter" ), 1, fcnPerimeter, QStringLiteral( "GeometryGroup" ) );
QgsStaticExpressionFunction *xFunc = new QgsStaticExpressionFunction( QStringLiteral( "$x" ), 0, fcnX, QStringLiteral( "GeometryGroup" ), QString(), true );
xFunc->setIsStatic( false );
sFunctions << xFunc;
QgsStaticExpressionFunction *yFunc = new QgsStaticExpressionFunction( QStringLiteral( "$y" ), 0, fcnY, QStringLiteral( "GeometryGroup" ), QString(), true );
yFunc->setIsStatic( false );
sFunctions << yFunc;
sFunctions
<< new QgsStaticExpressionFunction( QStringLiteral( "x" ), 1, fcnGeomX, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "y" ), 1, fcnGeomY, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "z" ), 1, fcnGeomZ, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "m" ), 1, fcnGeomM, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "point_n" ), 2, fcnPointN, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "start_point" ), 1, fcnStartPoint, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "end_point" ), 1, fcnEndPoint, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "nodes_to_points" ), -1, fcnNodesToPoints, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "segments_to_lines" ), 1, fcnSegmentsToLines, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "make_point" ), -1, fcnMakePoint, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "make_point_m" ), 3, fcnMakePointM, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "make_line" ), -1, fcnMakeLine, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "make_polygon" ), -1, fcnMakePolygon, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "make_triangle" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) ),
fcnMakeTriangle, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "make_circle" ), QgsExpressionFunction::ParameterList()
<< QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "radius" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "segments" ), true, 36 ),
fcnMakeCircle, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "make_ellipse" ), QgsExpressionFunction::ParameterList()
<< QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "semi_major_axis" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "semi_minor_axis" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "azimuth" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "segments" ), true, 36 ),
fcnMakeEllipse, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "make_regular_polygon" ), QgsExpressionFunction::ParameterList()
<< QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "number_sides" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "circle" ), true, 0 ),
fcnMakeRegularPolygon, QStringLiteral( "GeometryGroup" ) );
QgsStaticExpressionFunction *xAtFunc = new QgsStaticExpressionFunction( QStringLiteral( "$x_at" ), 1, fcnXat, QStringLiteral( "GeometryGroup" ), QString(), true, QSet<QString>(), false, QStringList() << QStringLiteral( "xat" ) << QStringLiteral( "x_at" ) );
xAtFunc->setIsStatic( false );
sFunctions << xAtFunc;
QgsStaticExpressionFunction *yAtFunc = new QgsStaticExpressionFunction( QStringLiteral( "$y_at" ), 1, fcnYat, QStringLiteral( "GeometryGroup" ), QString(), true, QSet<QString>(), false, QStringList() << QStringLiteral( "yat" ) << QStringLiteral( "y_at" ) );
yAtFunc->setIsStatic( false );
sFunctions << yAtFunc;
sFunctions
<< new QgsStaticExpressionFunction( QStringLiteral( "x_min" ), 1, fcnXMin, QStringLiteral( "GeometryGroup" ), QString(), false, QSet<QString>(), false, QStringList() << QStringLiteral( "xmin" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "x_max" ), 1, fcnXMax, QStringLiteral( "GeometryGroup" ), QString(), false, QSet<QString>(), false, QStringList() << QStringLiteral( "xmax" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "y_min" ), 1, fcnYMin, QStringLiteral( "GeometryGroup" ), QString(), false, QSet<QString>(), false, QStringList() << QStringLiteral( "ymin" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "y_max" ), 1, fcnYMax, QStringLiteral( "GeometryGroup" ), QString(), false, QSet<QString>(), false, QStringList() << QStringLiteral( "ymax" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "geom_from_wkt" ), 1, fcnGeomFromWKT, QStringLiteral( "GeometryGroup" ), QString(), false, QSet<QString>(), false, QStringList() << QStringLiteral( "geomFromWKT" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "geom_from_gml" ), 1, fcnGeomFromGML, QStringLiteral( "GeometryGroup" ), QString(), false, QSet<QString>(), false, QStringList() << QStringLiteral( "geomFromGML" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "flip_coordinates" ), 1, fcnFlipCoordinates, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "relate" ), -1, fcnRelate, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "intersects_bbox" ), 2, fcnBbox, QStringLiteral( "GeometryGroup" ), QString(), false, QSet<QString>(), false, QStringList() << QStringLiteral( "bbox" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "disjoint" ), 2, fcnDisjoint, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "intersects" ), 2, fcnIntersects, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "touches" ), 2, fcnTouches, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "crosses" ), 2, fcnCrosses, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "contains" ), 2, fcnContains, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "overlaps" ), 2, fcnOverlaps, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "within" ), 2, fcnWithin, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "translate" ), 3, fcnTranslate, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "buffer" ), -1, fcnBuffer, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "wedge_buffer" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "center" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "azimuth" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "width" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "outer_radius" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "inner_radius" ), true, 0.0 ), fcnWedgeBuffer, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "tapered_buffer" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "start_width" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "end_width" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "segments" ), true, 8.0 )
, fcnTaperedBuffer, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "buffer_by_m" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "segments" ), true, 8.0 )
, fcnBufferByM, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "offset_curve" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "distance" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "segments" ), true, 8.0 )
<< QgsExpressionFunction::Parameter( QStringLiteral( "join" ), true, QgsGeometry::JoinStyleRound )
<< QgsExpressionFunction::Parameter( QStringLiteral( "miter_limit" ), true, 2.0 ),
fcnOffsetCurve, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "single_sided_buffer" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "distance" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "segments" ), true, 8.0 )
<< QgsExpressionFunction::Parameter( QStringLiteral( "join" ), true, QgsGeometry::JoinStyleRound )
<< QgsExpressionFunction::Parameter( QStringLiteral( "miter_limit" ), true, 2.0 ),
fcnSingleSidedBuffer, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "extend" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "start_distance" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "end_distance" ) ),
fcnExtend, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "centroid" ), 1, fcnCentroid, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "point_on_surface" ), 1, fcnPointOnSurface, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "pole_of_inaccessibility" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "tolerance" ) ), fcnPoleOfInaccessibility, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "reverse" ), 1, fcnReverse, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "exterior_ring" ), 1, fcnExteriorRing, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "interior_ring_n" ), 2, fcnInteriorRingN, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "geometry_n" ), 2, fcnGeometryN, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "boundary" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) ), fcnBoundary, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "line_merge" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) ), fcnLineMerge, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "bounds" ), 1, fcnBounds, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "simplify" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "tolerance" ) ), fcnSimplify, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "simplify_vw" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "tolerance" ) ), fcnSimplifyVW, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "smooth" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "iterations" ), true, 1 )
<< QgsExpressionFunction::Parameter( QStringLiteral( "offset" ), true, 0.25 )
<< QgsExpressionFunction::Parameter( QStringLiteral( "min_length" ), true, -1 )
<< QgsExpressionFunction::Parameter( QStringLiteral( "max_angle" ), true, 180 ), fcnSmooth, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "num_points" ), 1, fcnGeomNumPoints, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "num_interior_rings" ), 1, fcnGeomNumInteriorRings, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "num_rings" ), 1, fcnGeomNumRings, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "num_geometries" ), 1, fcnGeomNumGeometries, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "bounds_width" ), 1, fcnBoundsWidth, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "bounds_height" ), 1, fcnBoundsHeight, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "is_closed" ), 1, fcnIsClosed, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "convex_hull" ), 1, fcnConvexHull, QStringLiteral( "GeometryGroup" ), QString(), false, QSet<QString>(), false, QStringList() << QStringLiteral( "convexHull" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "oriented_bbox" ), QgsExpressionFunction::ParameterList()
<< QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) ),
fcnOrientedBBox, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "minimal_circle" ), QgsExpressionFunction::ParameterList()
<< QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "segments" ), true, 36 ),
fcnMinimalCircle, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "difference" ), 2, fcnDifference, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "distance" ), 2, fcnDistance, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "hausdorff_distance" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "geometry1" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "geometry2" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "densify_fraction" ), true ), fcnHausdorffDistance, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "intersection" ), 2, fcnIntersection, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "sym_difference" ), 2, fcnSymDifference, QStringLiteral( "GeometryGroup" ), QString(), false, QSet<QString>(), false, QStringList() << QStringLiteral( "symDifference" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "combine" ), 2, fcnCombine, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "union" ), 2, fcnCombine, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "geom_to_wkt" ), -1, fcnGeomToWKT, QStringLiteral( "GeometryGroup" ), QString(), false, QSet<QString>(), false, QStringList() << QStringLiteral( "geomToWKT" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "geometry" ), 1, fcnGetGeometry, QStringLiteral( "GeometryGroup" ), QString(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "transform" ), 3, fcnTransformGeometry, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "extrude" ), 3, fcnExtrude, QStringLiteral( "GeometryGroup" ), QString() );;
QgsStaticExpressionFunction *orderPartsFunc = new QgsStaticExpressionFunction( QStringLiteral( "order_parts" ), 3, fcnOrderParts, QStringLiteral( "GeometryGroup" ), QString() );
orderPartsFunc->setIsStaticFunction(
[]( const QgsExpressionNodeFunction * node, QgsExpression * parent, const QgsExpressionContext * context )
{
const QList< QgsExpressionNode *> argList = node->args()->list();
for ( QgsExpressionNode *argNode : argList )
{
if ( !argNode->isStatic( parent, context ) )
return false;
}
if ( node->args()->count() > 1 )
{
QgsExpressionNode *argNode = node->args()->at( 1 );
QString expString = argNode->eval( parent, context ).toString();
QgsExpression e( expString );
if ( e.rootNode() && e.rootNode()->isStatic( parent, context ) )
return true;
}
return true;
} );
orderPartsFunc->setPrepareFunction( []( const QgsExpressionNodeFunction * node, QgsExpression * parent, const QgsExpressionContext * context )
{
if ( node->args()->count() > 1 )
{
QgsExpressionNode *argNode = node->args()->at( 1 );
QString expression = argNode->eval( parent, context ).toString();
QgsExpression e( expression );
e.prepare( context );
context->setCachedValue( expression, QVariant::fromValue( e ) );
}
return true;
}
);
sFunctions << orderPartsFunc;
sFunctions
<< new QgsStaticExpressionFunction( QStringLiteral( "closest_point" ), 2, fcnClosestPoint, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "shortest_line" ), 2, fcnShortestLine, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "line_interpolate_point" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "distance" ) ), fcnLineInterpolatePoint, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "line_interpolate_angle" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "distance" ) ), fcnLineInterpolateAngle, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "line_locate_point" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "point" ) ), fcnLineLocatePoint, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "angle_at_vertex" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "vertex" ) ), fcnAngleAtVertex, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "distance_to_vertex" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "vertex" ) ), fcnDistanceToVertex, QStringLiteral( "GeometryGroup" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "line_substring" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "geometry" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "start_distance" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "end_distance" ) ), fcnLineSubset, QStringLiteral( "GeometryGroup" ) );
// **Record** functions
QgsStaticExpressionFunction *idFunc = new QgsStaticExpressionFunction( QStringLiteral( "$id" ), 0, fcnFeatureId, QStringLiteral( "Record and Attributes" ) );
idFunc->setIsStatic( false );
sFunctions << idFunc;
QgsStaticExpressionFunction *currentFeatureFunc = new QgsStaticExpressionFunction( QStringLiteral( "$currentfeature" ), 0, fcnFeature, QStringLiteral( "Record and Attributes" ) );
currentFeatureFunc->setIsStatic( false );
sFunctions << currentFeatureFunc;
QgsStaticExpressionFunction *uuidFunc = new QgsStaticExpressionFunction( QStringLiteral( "uuid" ), 0, fcnUuid, QStringLiteral( "Record and Attributes" ), QString(), false, QSet<QString>(), false, QStringList() << QStringLiteral( "$uuid" ) );
uuidFunc->setIsStatic( false );
sFunctions << uuidFunc;
sFunctions
<< new QgsStaticExpressionFunction( QStringLiteral( "get_feature" ), 3, fcnGetFeature, QStringLiteral( "Record and Attributes" ), QString(), false, QSet<QString>(), false, QStringList() << QStringLiteral( "QgsExpressionUtils::getFeature" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "get_feature_by_id" ), 2, fcnGetFeatureById, QStringLiteral( "Record and Attributes" ), QString(), false, QSet<QString>(), false );
QgsStaticExpressionFunction *isSelectedFunc = new QgsStaticExpressionFunction(
QStringLiteral( "is_selected" ),
-1,
fcnIsSelected,
QStringLiteral( "Record and Attributes" ),
QString(),
false,
QSet<QString>()
);
isSelectedFunc->setIsStatic( false );
sFunctions << isSelectedFunc;
sFunctions
<< new QgsStaticExpressionFunction(
QStringLiteral( "num_selected" ),
-1,
fcnNumSelected,
QStringLiteral( "Record and Attributes" ),
QString(),
false,
QSet<QString>()
);
// **Fields and Values** functions
QgsStaticExpressionFunction *representValueFunc = new QgsStaticExpressionFunction( QStringLiteral( "represent_value" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "attribute" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "field_name" ), true ), fcnRepresentValue, QStringLiteral( "Record and Attributes" ) );
representValueFunc->setPrepareFunction( []( const QgsExpressionNodeFunction * node, QgsExpression * parent, const QgsExpressionContext * context )
{
Q_UNUSED( context )
if ( node->args()->count() == 1 )
{
QgsExpressionNodeColumnRef *colRef = dynamic_cast<QgsExpressionNodeColumnRef *>( node->args()->at( 0 ) );
if ( colRef )
{
return true;
}
else
{
parent->setEvalErrorString( tr( "If represent_value is called with 1 parameter, it must be an attribute." ) );
return false;
}
}
else if ( node->args()->count() == 2 )
{
return true;
}
else
{
parent->setEvalErrorString( tr( "represent_value must be called with exactly 1 or 2 parameters." ) );
return false;
}
}
);
sFunctions << representValueFunc;
// **General** functions
sFunctions
<< new QgsStaticExpressionFunction( QStringLiteral( "layer_property" ), 2, fcnGetLayerProperty, QStringLiteral( "General" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "raster_statistic" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "layer" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "band" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "statistic" ) ), fcnGetRasterBandStat, QStringLiteral( "Rasters" ) );
// **var** function
QgsStaticExpressionFunction *varFunction = new QgsStaticExpressionFunction( QStringLiteral( "var" ), 1, fcnGetVariable, QStringLiteral( "General" ) );
varFunction->setIsStaticFunction(
[]( const QgsExpressionNodeFunction * node, QgsExpression * parent, const QgsExpressionContext * context )
{
/* A variable node is static if it has a static name and the name can be found at prepare
* time and is tagged with isStatic.
* It is not static if a variable is set during iteration or not tagged isStatic.
* (e.g. geom_part variable)
*/
if ( node->args()->count() > 0 )
{
QgsExpressionNode *argNode = node->args()->at( 0 );
if ( !argNode->isStatic( parent, context ) )
return false;
QString varName = argNode->eval( parent, context ).toString();
const QgsExpressionContextScope *scope = context->activeScopeForVariable( varName );
return scope ? scope->isStatic( varName ) : false;
}
return false;
}
);
sFunctions
<< varFunction;
QgsStaticExpressionFunction *evalFunc = new QgsStaticExpressionFunction( QStringLiteral( "eval" ), 1, fcnEval, QStringLiteral( "General" ), QString(), true, QSet<QString>() << QgsFeatureRequest::ALL_ATTRIBUTES );
evalFunc->setIsStaticFunction(
[]( const QgsExpressionNodeFunction * node, QgsExpression * parent, const QgsExpressionContext * context )
{
if ( node->args()->count() > 0 )
{
QgsExpressionNode *argNode = node->args()->at( 0 );
if ( argNode->isStatic( parent, context ) )
{
QString expString = argNode->eval( parent, context ).toString();
QgsExpression e( expString );
if ( e.rootNode() && e.rootNode()->isStatic( parent, context ) )
return true;
}
}
return false;
} );
sFunctions << evalFunc;
sFunctions
<< new QgsStaticExpressionFunction( QStringLiteral( "env" ), 1, fcnEnvVar, QStringLiteral( "General" ), QString() )
<< new QgsWithVariableExpressionFunction()
<< new QgsStaticExpressionFunction( QStringLiteral( "attribute" ), 2, fcnAttribute, QStringLiteral( "Record and Attributes" ), QString(), false, QSet<QString>() << QgsFeatureRequest::ALL_ATTRIBUTES )
<< new QgsStaticExpressionFunction( QStringLiteral( "raster_value" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "layer" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "band" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "point" ) ), fcnRasterValue, QStringLiteral( "Rasters" ) )
// functions for arrays
<< new QgsArrayForeachExpressionFunction()
<< new QgsStaticExpressionFunction( QStringLiteral( "array" ), -1, fcnArray, QStringLiteral( "Arrays" ), QString(), false, QSet<QString>(), false, QStringList(), true )
<< new QgsStaticExpressionFunction( QStringLiteral( "array_length" ), 1, fcnArrayLength, QStringLiteral( "Arrays" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "array_contains" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "array" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ), fcnArrayContains, QStringLiteral( "Arrays" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "array_find" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "array" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ), fcnArrayFind, QStringLiteral( "Arrays" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "array_get" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "array" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "pos" ) ), fcnArrayGet, QStringLiteral( "Arrays" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "array_first" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "array" ) ), fcnArrayFirst, QStringLiteral( "Arrays" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "array_last" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "array" ) ), fcnArrayLast, QStringLiteral( "Arrays" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "array_append" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "array" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ), fcnArrayAppend, QStringLiteral( "Arrays" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "array_prepend" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "array" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ), fcnArrayPrepend, QStringLiteral( "Arrays" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "array_insert" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "array" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "pos" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ), fcnArrayInsert, QStringLiteral( "Arrays" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "array_remove_at" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "array" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "pos" ) ), fcnArrayRemoveAt, QStringLiteral( "Arrays" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "array_remove_all" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "array" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ), fcnArrayRemoveAll, QStringLiteral( "Arrays" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "array_cat" ), -1, fcnArrayCat, QStringLiteral( "Arrays" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "array_slice" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "array" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "start_pos" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "end_pos" ) ), fcnArraySlice, QStringLiteral( "Arrays" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "array_reverse" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "array" ) ), fcnArrayReverse, QStringLiteral( "Arrays" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "array_intersect" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "array1" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "array2" ) ), fcnArrayIntersect, QStringLiteral( "Arrays" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "array_distinct" ), 1, fcnArrayDistinct, QStringLiteral( "Arrays" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "array_to_string" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "array" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "delimiter" ), true, "," ) << QgsExpressionFunction::Parameter( QStringLiteral( "emptyvalue" ), true, "" ), fcnArrayToString, QStringLiteral( "Arrays" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "string_to_array" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "string" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "delimiter" ), true, "," ) << QgsExpressionFunction::Parameter( QStringLiteral( "emptyvalue" ), true, "" ), fcnStringToArray, QStringLiteral( "Arrays" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "generate_series" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "start" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "stop" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "step" ), true, 1.0 ), fcnGenerateSeries, QStringLiteral( "Arrays" ) )
//functions for maps
<< new QgsStaticExpressionFunction( QStringLiteral( "map" ), -1, fcnMap, QStringLiteral( "Maps" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "map_get" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "map" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "key" ) ), fcnMapGet, QStringLiteral( "Maps" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "map_exist" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "map" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "key" ) ), fcnMapExist, QStringLiteral( "Maps" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "map_delete" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "map" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "key" ) ), fcnMapDelete, QStringLiteral( "Maps" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "map_insert" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "map" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "key" ) ) << QgsExpressionFunction::Parameter( QStringLiteral( "value" ) ), fcnMapInsert, QStringLiteral( "Maps" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "map_concat" ), -1, fcnMapConcat, QStringLiteral( "Maps" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "map_akeys" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "map" ) ), fcnMapAKeys, QStringLiteral( "Maps" ) )
<< new QgsStaticExpressionFunction( QStringLiteral( "map_avals" ), QgsExpressionFunction::ParameterList() << QgsExpressionFunction::Parameter( QStringLiteral( "map" ) ), fcnMapAVals, QStringLiteral( "Maps" ) )
;
QgsExpressionContextUtils::registerContextFunctions();
//QgsExpression has ownership of all built-in functions
for ( QgsExpressionFunction *func : qgis::as_const( sFunctions ) )
{
sOwnedFunctions << func;
sBuiltinFunctions << func->name();
sBuiltinFunctions.append( func->aliases() );
}
}
return sFunctions;
}
QgsArrayForeachExpressionFunction::QgsArrayForeachExpressionFunction()
: QgsExpressionFunction( QStringLiteral( "array_foreach" ), 2, QCoreApplication::tr( "Arrays" ) )
{
}
bool QgsArrayForeachExpressionFunction::isStatic( const QgsExpressionNodeFunction *node, QgsExpression *parent, const QgsExpressionContext *context ) const
{
bool isStatic = false;
QgsExpressionNode::NodeList *args = node->args();
if ( args->count() < 2 )
return false;
if ( args->at( 0 )->isStatic( parent, context ) && args->at( 1 )->isStatic( parent, context ) )
{
isStatic = true;
}
return isStatic;
}
QVariant QgsArrayForeachExpressionFunction::run( QgsExpressionNode::NodeList *args, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction *node )
{
Q_UNUSED( node )
QVariantList result;
if ( args->count() < 2 )
// error
return result;
QVariantList array = args->at( 0 )->eval( parent, context ).toList();
QgsExpressionContext *subContext = const_cast<QgsExpressionContext *>( context );
if ( !context )
subContext = new QgsExpressionContext();
QgsExpressionContextScope *subScope = new QgsExpressionContextScope();
subContext->appendScope( subScope );
for ( QVariantList::const_iterator it = array.constBegin(); it != array.constEnd(); ++it )
{
subScope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "element" ), *it, true ) );
result << args->at( 1 )->eval( parent, subContext );
}
if ( !context )
delete subContext;
return result;
}
QVariant QgsArrayForeachExpressionFunction::func( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction *node )
{
// This is a dummy function, all the real handling is in run
Q_UNUSED( values )
Q_UNUSED( context )
Q_UNUSED( parent )
Q_UNUSED( node )
Q_ASSERT( false );
return QVariant();
}
bool QgsArrayForeachExpressionFunction::prepare( const QgsExpressionNodeFunction *node, QgsExpression *parent, const QgsExpressionContext *context ) const
{
QgsExpressionNode::NodeList *args = node->args();
if ( args->count() < 2 )
// error
return false;
args->at( 0 )->prepare( parent, context );
QgsExpressionContext subContext;
if ( context )
subContext = *context;
QgsExpressionContextScope *subScope = new QgsExpressionContextScope();
subScope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "element" ), QVariant(), true ) );
subContext.appendScope( subScope );
args->at( 1 )->prepare( parent, &subContext );
return true;
}
QgsWithVariableExpressionFunction::QgsWithVariableExpressionFunction()
: QgsExpressionFunction( QStringLiteral( "with_variable" ), QgsExpressionFunction::ParameterList() <<
QgsExpressionFunction::Parameter( QStringLiteral( "name" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "value" ) )
<< QgsExpressionFunction::Parameter( QStringLiteral( "expression" ) ),
QCoreApplication::tr( "General" ) )
{
}
bool QgsWithVariableExpressionFunction::isStatic( const QgsExpressionNodeFunction *node, QgsExpression *parent, const QgsExpressionContext *context ) const
{
bool isStatic = false;
QgsExpressionNode::NodeList *args = node->args();
if ( args->count() < 3 )
return false;
// We only need to check if the node evaluation is static, if both - name and value - are static.
if ( args->at( 0 )->isStatic( parent, context ) && args->at( 1 )->isStatic( parent, context ) )
{
QVariant name = args->at( 0 )->eval( parent, context );
QVariant value = args->at( 1 )->eval( parent, context );
// Temporarily append a new scope to provide the variable
appendTemporaryVariable( context, name.toString(), value );
if ( args->at( 2 )->isStatic( parent, context ) )
isStatic = true;
popTemporaryVariable( context );
}
return isStatic;
}
QVariant QgsWithVariableExpressionFunction::run( QgsExpressionNode::NodeList *args, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction *node )
{
Q_UNUSED( node )
QVariant result;
if ( args->count() < 3 )
// error
return result;
QVariant name = args->at( 0 )->eval( parent, context );
QVariant value = args->at( 1 )->eval( parent, context );
QgsExpressionContext *updatedContext = const_cast<QgsExpressionContext *>( context );
if ( !context )
updatedContext = new QgsExpressionContext();
appendTemporaryVariable( updatedContext, name.toString(), value );
result = args->at( 2 )->eval( parent, updatedContext );
popTemporaryVariable( updatedContext );
if ( !context )
delete updatedContext;
return result;
}
QVariant QgsWithVariableExpressionFunction::func( const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction *node )
{
// This is a dummy function, all the real handling is in run
Q_UNUSED( values )
Q_UNUSED( context )
Q_UNUSED( parent )
Q_UNUSED( node )
Q_ASSERT( false );
return QVariant();
}
bool QgsWithVariableExpressionFunction::prepare( const QgsExpressionNodeFunction *node, QgsExpression *parent, const QgsExpressionContext *context ) const
{
QgsExpressionNode::NodeList *args = node->args();
if ( args->count() < 3 )
// error
return false;
QVariant name = args->at( 0 )->prepare( parent, context );
QVariant value = args->at( 1 )->prepare( parent, context );
QgsExpressionContext *updatedContext = const_cast<QgsExpressionContext *>( context );
std::unique_ptr< QgsExpressionContext > tempContext;
if ( !context )
{
tempContext = qgis::make_unique< QgsExpressionContext >();
updatedContext = tempContext.get();
}
appendTemporaryVariable( updatedContext, name.toString(), value );
args->at( 2 )->prepare( parent, updatedContext );
if ( context )
popTemporaryVariable( updatedContext );
return true;
}
void QgsWithVariableExpressionFunction::popTemporaryVariable( const QgsExpressionContext *context ) const
{
QgsExpressionContext *updatedContext = const_cast<QgsExpressionContext *>( context );
delete updatedContext->popScope();
}
void QgsWithVariableExpressionFunction::appendTemporaryVariable( const QgsExpressionContext *context, const QString &name, const QVariant &value ) const
{
QgsExpressionContextScope *scope = new QgsExpressionContextScope();
scope->addVariable( QgsExpressionContextScope::StaticVariable( name, value, true ) );
QgsExpressionContext *updatedContext = const_cast<QgsExpressionContext *>( context );
updatedContext->appendScope( scope );
}