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qgsmapboxglstyleconverter.cpp
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qgsmapboxglstyleconverter.cpp
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/***************************************************************************
qgsmapboxglstyleconverter.cpp
--------------------------------------
Date : September 2020
Copyright : (C) 2020 by Nyall Dawson
Email : nyall dot dawson at gmail dot com
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
/*
* Ported from original work by Martin Dobias, and extended by the MapTiler team!
*/
#include "qgsmapboxglstyleconverter.h"
#include "qgsvectortilebasicrenderer.h"
#include "qgsvectortilebasiclabeling.h"
#include "qgssymbollayer.h"
#include "qgssymbollayerutils.h"
#include "qgslogger.h"
#include "qgsfillsymbollayer.h"
#include "qgslinesymbollayer.h"
#include "qgsfontutils.h"
#include "qgsjsonutils.h"
#include "qgspainteffect.h"
#include "qgseffectstack.h"
#include "qgsblureffect.h"
#include "qgsmarkersymbollayer.h"
#include "qgstextbackgroundsettings.h"
QgsMapBoxGlStyleConverter::QgsMapBoxGlStyleConverter()
{
}
QgsMapBoxGlStyleConverter::Result QgsMapBoxGlStyleConverter::convert( const QVariantMap &style, QgsMapBoxGlStyleConversionContext *context )
{
mError.clear();
mWarnings.clear();
if ( style.contains( QStringLiteral( "layers" ) ) )
{
parseLayers( style.value( QStringLiteral( "layers" ) ).toList(), context );
}
else
{
mError = QObject::tr( "Could not find layers list in JSON" );
return NoLayerList;
}
return Success;
}
QgsMapBoxGlStyleConverter::Result QgsMapBoxGlStyleConverter::convert( const QString &style, QgsMapBoxGlStyleConversionContext *context )
{
return convert( QgsJsonUtils::parseJson( style ).toMap(), context );
}
QgsMapBoxGlStyleConverter::~QgsMapBoxGlStyleConverter() = default;
void QgsMapBoxGlStyleConverter::parseLayers( const QVariantList &layers, QgsMapBoxGlStyleConversionContext *context )
{
std::unique_ptr< QgsMapBoxGlStyleConversionContext > tmpContext;
if ( !context )
{
tmpContext = qgis::make_unique< QgsMapBoxGlStyleConversionContext >();
context = tmpContext.get();
}
QList<QgsVectorTileBasicRendererStyle> rendererStyles;
QList<QgsVectorTileBasicLabelingStyle> labelingStyles;
for ( const QVariant &layer : layers )
{
const QVariantMap jsonLayer = layer.toMap();
const QString layerType = jsonLayer.value( QStringLiteral( "type" ) ).toString();
if ( layerType == QLatin1String( "background" ) )
continue;
const QString styleId = jsonLayer.value( QStringLiteral( "id" ) ).toString();
const QString layerName = jsonLayer.value( QStringLiteral( "source-layer" ) ).toString();
const int minZoom = jsonLayer.value( QStringLiteral( "minzoom" ), QStringLiteral( "-1" ) ).toInt();
const int maxZoom = jsonLayer.value( QStringLiteral( "maxzoom" ), QStringLiteral( "-1" ) ).toInt();
const bool enabled = jsonLayer.value( QStringLiteral( "visibility" ) ).toString() != QLatin1String( "none" );
QString filterExpression;
if ( jsonLayer.contains( QStringLiteral( "filter" ) ) )
{
filterExpression = parseExpression( jsonLayer.value( QStringLiteral( "filter" ) ).toList(), *context );
}
QgsVectorTileBasicRendererStyle rendererStyle;
QgsVectorTileBasicLabelingStyle labelingStyle;
bool hasRendererStyle = false;
bool hasLabelingStyle = false;
if ( layerType == QLatin1String( "fill" ) )
{
hasRendererStyle = parseFillLayer( jsonLayer, rendererStyle, *context );
}
else if ( layerType == QLatin1String( "line" ) )
{
hasRendererStyle = parseLineLayer( jsonLayer, rendererStyle, *context );
}
else if ( layerType == QLatin1String( "symbol" ) )
{
parseSymbolLayer( jsonLayer, rendererStyle, hasRendererStyle, labelingStyle, hasLabelingStyle, *context );
}
else
{
mWarnings << QObject::tr( "Skipping unknown layer type: %1" ).arg( layerType );
QgsDebugMsg( mWarnings.constLast() );
continue;
}
if ( hasRendererStyle )
{
rendererStyle.setStyleName( styleId );
rendererStyle.setLayerName( layerName );
rendererStyle.setFilterExpression( filterExpression );
rendererStyle.setMinZoomLevel( minZoom );
rendererStyle.setMaxZoomLevel( maxZoom );
rendererStyle.setEnabled( enabled );
rendererStyles.append( rendererStyle );
}
if ( hasLabelingStyle )
{
labelingStyle.setStyleName( styleId );
labelingStyle.setLayerName( layerName );
labelingStyle.setFilterExpression( filterExpression );
labelingStyle.setMinZoomLevel( minZoom );
labelingStyle.setMaxZoomLevel( maxZoom );
labelingStyle.setEnabled( enabled );
labelingStyles.append( labelingStyle );
}
mWarnings.append( context->warnings() );
context->clearWarnings();
}
mRenderer = qgis::make_unique< QgsVectorTileBasicRenderer >();
QgsVectorTileBasicRenderer *renderer = dynamic_cast< QgsVectorTileBasicRenderer *>( mRenderer.get() );
renderer->setStyles( rendererStyles );
mLabeling = qgis::make_unique< QgsVectorTileBasicLabeling >();
QgsVectorTileBasicLabeling *labeling = dynamic_cast< QgsVectorTileBasicLabeling * >( mLabeling.get() );
labeling->setStyles( labelingStyles );
}
bool QgsMapBoxGlStyleConverter::parseFillLayer( const QVariantMap &jsonLayer, QgsVectorTileBasicRendererStyle &style, QgsMapBoxGlStyleConversionContext &context )
{
if ( !jsonLayer.contains( QStringLiteral( "paint" ) ) )
{
context.pushWarning( QObject::tr( "Style layer %1 has no paint property, skipping" ).arg( jsonLayer.value( QStringLiteral( "id" ) ).toString() ) );
return false;
}
const QVariantMap jsonPaint = jsonLayer.value( QStringLiteral( "paint" ) ).toMap();
QgsPropertyCollection ddProperties;
QgsPropertyCollection ddRasterProperties;
// fill color
QColor fillColor;
if ( jsonPaint.contains( QStringLiteral( "fill-color" ) ) )
{
const QVariant jsonFillColor = jsonPaint.value( QStringLiteral( "fill-color" ) );
switch ( jsonFillColor.type() )
{
case QVariant::Map:
ddProperties.setProperty( QgsSymbolLayer::PropertyFillColor, parseInterpolateColorByZoom( jsonFillColor.toMap(), context, &fillColor ) );
break;
case QVariant::List:
case QVariant::StringList:
ddProperties.setProperty( QgsSymbolLayer::PropertyFillColor, parseValueList( jsonFillColor.toList(), PropertyType::Color, context, 1, 255, &fillColor ) );
break;
case QVariant::String:
fillColor = parseColor( jsonFillColor.toString(), context );
break;
default:
{
context.pushWarning( QObject::tr( "Skipping non-implemented color expression" ) );
break;
}
}
}
QColor fillOutlineColor;
if ( !jsonPaint.contains( QStringLiteral( "fill-outline-color" ) ) )
{
// fill-outline-color
if ( fillColor.isValid() )
fillOutlineColor = fillColor;
else
{
// use fill color data defined property
if ( ddProperties.isActive( QgsSymbolLayer::PropertyFillColor ) )
ddProperties.setProperty( QgsSymbolLayer::PropertyStrokeColor, ddProperties.property( QgsSymbolLayer::PropertyFillColor ) );
}
}
else
{
const QVariant jsonFillOutlineColor = jsonPaint.value( QStringLiteral( "fill-outline-color" ) );
switch ( jsonFillOutlineColor.type() )
{
case QVariant::Map:
ddProperties.setProperty( QgsSymbolLayer::PropertyStrokeColor, parseInterpolateColorByZoom( jsonFillOutlineColor.toMap(), context, &fillOutlineColor ) );
break;
case QVariant::List:
case QVariant::StringList:
ddProperties.setProperty( QgsSymbolLayer::PropertyStrokeColor, parseValueList( jsonFillOutlineColor.toList(), PropertyType::Color, context, 1, 255, &fillOutlineColor ) );
break;
case QVariant::String:
fillOutlineColor = parseColor( jsonFillOutlineColor.toString(), context );
break;
default:
context.pushWarning( QObject::tr( "Skipping non-implemented color expression" ) );
break;
}
}
double fillOpacity = -1.0;
double rasterOpacity = -1.0;
if ( jsonPaint.contains( QStringLiteral( "fill-opacity" ) ) )
{
const QVariant jsonFillOpacity = jsonPaint.value( QStringLiteral( "fill-opacity" ) );
switch ( jsonFillOpacity.type() )
{
case QVariant::Int:
case QVariant::Double:
fillOpacity = jsonFillOpacity.toDouble();
rasterOpacity = fillOpacity;
break;
case QVariant::Map:
if ( ddProperties.isActive( QgsSymbolLayer::PropertyFillColor ) )
{
context.pushWarning( QObject::tr( "Could not set opacity of layer %1, opacity already defined in fill color" ).arg( jsonLayer.value( QStringLiteral( "id" ) ).toString() ) );
}
else
{
ddProperties.setProperty( QgsSymbolLayer::PropertyFillColor, parseInterpolateOpacityByZoom( jsonFillOpacity.toMap(), fillColor.isValid() ? fillColor.alpha() : 255 ) );
ddProperties.setProperty( QgsSymbolLayer::PropertyStrokeColor, parseInterpolateOpacityByZoom( jsonFillOpacity.toMap(), fillOutlineColor.isValid() ? fillOutlineColor.alpha() : 255 ) );
ddRasterProperties.setProperty( QgsSymbolLayer::PropertyOpacity, parseInterpolateByZoom( jsonFillOpacity.toMap(), context, 100, &rasterOpacity ) );
}
break;
case QVariant::List:
case QVariant::StringList:
if ( ddProperties.isActive( QgsSymbolLayer::PropertyFillColor ) )
{
context.pushWarning( QObject::tr( "Could not set opacity of layer %1, opacity already defined in fill color" ).arg( jsonLayer.value( QStringLiteral( "id" ) ).toString() ) );
}
else
{
ddProperties.setProperty( QgsSymbolLayer::PropertyFillColor, parseValueList( jsonFillOpacity.toList(), PropertyType::Opacity, context, 1, fillColor.isValid() ? fillColor.alpha() : 255 ) );
ddProperties.setProperty( QgsSymbolLayer::PropertyStrokeColor, parseValueList( jsonFillOpacity.toList(), PropertyType::Opacity, context, 1, fillOutlineColor.isValid() ? fillOutlineColor.alpha() : 255 ) );
ddRasterProperties.setProperty( QgsSymbolLayer::PropertyOpacity, parseValueList( jsonFillOpacity.toList(), PropertyType::Numeric, context, 100, 255, nullptr, &rasterOpacity ) );
}
break;
default:
context.pushWarning( QObject::tr( "Skipping non-implemented opacity expression" ) );
break;
}
}
// fill-translate
QPointF fillTranslate;
if ( jsonPaint.contains( QStringLiteral( "fill-translate" ) ) )
{
const QVariant jsonFillTranslate = jsonPaint.value( QStringLiteral( "fill-translate" ) );
switch ( jsonFillTranslate.type() )
{
case QVariant::Map:
ddProperties.setProperty( QgsSymbolLayer::PropertyOffset, parseInterpolatePointByZoom( jsonFillTranslate.toMap(), context, context.pixelSizeConversionFactor(), &fillTranslate ) );
break;
case QVariant::List:
case QVariant::StringList:
fillTranslate = QPointF( jsonFillTranslate.toList().value( 0 ).toDouble() * context.pixelSizeConversionFactor(),
jsonFillTranslate.toList().value( 1 ).toDouble() * context.pixelSizeConversionFactor() );
break;
default:
context.pushWarning( QObject::tr( "Skipping non-implemented fill-translate expression" ) );
break;
}
}
std::unique_ptr< QgsSymbol > symbol( QgsSymbol::defaultSymbol( QgsWkbTypes::PolygonGeometry ) );
QgsSimpleFillSymbolLayer *fillSymbol = dynamic_cast< QgsSimpleFillSymbolLayer * >( symbol->symbolLayer( 0 ) );
// set render units
symbol->setOutputUnit( context.targetUnit() );
fillSymbol->setOutputUnit( context.targetUnit() );
if ( !fillTranslate.isNull() )
{
fillSymbol->setOffset( fillTranslate );
}
fillSymbol->setOffsetUnit( context.targetUnit() );
if ( jsonPaint.contains( QStringLiteral( "fill-pattern" ) ) )
{
// get fill-pattern to set sprite
const QVariant fillPatternJson = jsonPaint.value( QStringLiteral( "fill-pattern" ) );
// fill-pattern can be String or Object
// String: {"fill-pattern": "dash-t"}
// Object: {"fill-pattern":{"stops":[[11,"wetland8"],[12,"wetland16"]]}}
QSize spriteSize;
QString spriteProperty, spriteSizeProperty;
const QString sprite = retrieveSpriteAsBase64( fillPatternJson, context, spriteSize, spriteProperty, spriteSizeProperty );
if ( !sprite.isEmpty() )
{
// when fill-pattern exists, set and insert QgsRasterFillSymbolLayer
QgsRasterFillSymbolLayer *rasterFill = new QgsRasterFillSymbolLayer();
rasterFill->setImageFilePath( sprite );
rasterFill->setCoordinateMode( QgsRasterFillSymbolLayer::Viewport );
if ( rasterOpacity >= 0 )
{
rasterFill->setOpacity( rasterOpacity );
}
if ( !spriteProperty.isEmpty() )
{
ddRasterProperties.setProperty( QgsSymbolLayer::PropertyFile, QgsProperty::fromExpression( spriteProperty ) );
}
rasterFill->setDataDefinedProperties( ddRasterProperties );
symbol->appendSymbolLayer( rasterFill );
}
}
fillSymbol->setDataDefinedProperties( ddProperties );
if ( fillOpacity != -1 )
{
symbol->setOpacity( fillOpacity );
}
if ( fillOutlineColor.isValid() )
{
fillSymbol->setStrokeColor( fillOutlineColor );
}
else
{
fillSymbol->setStrokeStyle( Qt::NoPen );
}
if ( fillColor.isValid() )
{
fillSymbol->setFillColor( fillColor );
}
else
{
fillSymbol->setBrushStyle( Qt::NoBrush );
}
style.setGeometryType( QgsWkbTypes::PolygonGeometry );
style.setSymbol( symbol.release() );
return true;
}
bool QgsMapBoxGlStyleConverter::parseLineLayer( const QVariantMap &jsonLayer, QgsVectorTileBasicRendererStyle &style, QgsMapBoxGlStyleConversionContext &context )
{
if ( !jsonLayer.contains( QStringLiteral( "paint" ) ) )
{
context.pushWarning( QObject::tr( "Style layer %1 has no paint property, skipping" ).arg( jsonLayer.value( QStringLiteral( "id" ) ).toString() ) );
return false;
}
const QVariantMap jsonPaint = jsonLayer.value( QStringLiteral( "paint" ) ).toMap();
QgsPropertyCollection ddProperties;
// line color
QColor lineColor;
if ( jsonPaint.contains( QStringLiteral( "line-color" ) ) )
{
const QVariant jsonLineColor = jsonPaint.value( QStringLiteral( "line-color" ) );
switch ( jsonLineColor.type() )
{
case QVariant::Map:
ddProperties.setProperty( QgsSymbolLayer::PropertyFillColor, parseInterpolateColorByZoom( jsonLineColor.toMap(), context, &lineColor ) );
ddProperties.setProperty( QgsSymbolLayer::PropertyStrokeColor, ddProperties.property( QgsSymbolLayer::PropertyFillColor ) );
break;
case QVariant::List:
case QVariant::StringList:
ddProperties.setProperty( QgsSymbolLayer::PropertyFillColor, parseValueList( jsonLineColor.toList(), PropertyType::Color, context, 1, 255, &lineColor ) );
ddProperties.setProperty( QgsSymbolLayer::PropertyStrokeColor, ddProperties.property( QgsSymbolLayer::PropertyFillColor ) );
break;
case QVariant::String:
lineColor = parseColor( jsonLineColor.toString(), context );
break;
default:
context.pushWarning( QObject::tr( "Skipping non-implemented color expression" ) );
break;
}
}
double lineWidth = 1.0;
if ( jsonPaint.contains( QStringLiteral( "line-width" ) ) )
{
const QVariant jsonLineWidth = jsonPaint.value( QStringLiteral( "line-width" ) );
switch ( jsonLineWidth.type() )
{
case QVariant::Int:
case QVariant::Double:
lineWidth = jsonLineWidth.toDouble() * context.pixelSizeConversionFactor();
break;
case QVariant::Map:
lineWidth = -1;
ddProperties.setProperty( QgsSymbolLayer::PropertyStrokeWidth, parseInterpolateByZoom( jsonLineWidth.toMap(), context, context.pixelSizeConversionFactor(), &lineWidth ) );
break;
case QVariant::List:
case QVariant::StringList:
ddProperties.setProperty( QgsSymbolLayer::PropertyStrokeWidth, parseValueList( jsonLineWidth.toList(), PropertyType::Numeric, context, context.pixelSizeConversionFactor(), 255, nullptr, &lineWidth ) );
break;
default:
context.pushWarning( QObject::tr( "Skipping non-implemented line-width expression" ) );
break;
}
}
double lineOffset = 0.0;
if ( jsonPaint.contains( QStringLiteral( "line-offset" ) ) )
{
const QVariant jsonLineOffset = jsonPaint.value( QStringLiteral( "line-offset" ) );
switch ( jsonLineOffset.type() )
{
case QVariant::Int:
case QVariant::Double:
lineOffset = -jsonLineOffset.toDouble() * context.pixelSizeConversionFactor();
break;
case QVariant::Map:
lineWidth = -1;
ddProperties.setProperty( QgsSymbolLayer::PropertyOffset, parseInterpolateByZoom( jsonLineOffset.toMap(), context, context.pixelSizeConversionFactor() * -1, &lineOffset ) );
break;
case QVariant::List:
case QVariant::StringList:
ddProperties.setProperty( QgsSymbolLayer::PropertyOffset, parseValueList( jsonLineOffset.toList(), PropertyType::Numeric, context, context.pixelSizeConversionFactor() * -1, 255, nullptr, &lineOffset ) );
break;
default:
context.pushWarning( QObject::tr( "Skipping non-implemented line-offset expression" ) );
break;
}
}
double lineOpacity = -1.0;
if ( jsonPaint.contains( QStringLiteral( "line-opacity" ) ) )
{
const QVariant jsonLineOpacity = jsonPaint.value( QStringLiteral( "line-opacity" ) );
switch ( jsonLineOpacity.type() )
{
case QVariant::Int:
case QVariant::Double:
lineOpacity = jsonLineOpacity.toDouble();
break;
case QVariant::Map:
if ( ddProperties.isActive( QgsSymbolLayer::PropertyStrokeColor ) )
{
context.pushWarning( QObject::tr( "Could not set opacity of layer %1, opacity already defined in stroke color" ).arg( jsonLayer.value( QStringLiteral( "id" ) ).toString() ) );
}
else
{
ddProperties.setProperty( QgsSymbolLayer::PropertyStrokeColor, parseInterpolateOpacityByZoom( jsonLineOpacity.toMap(), lineColor.isValid() ? lineColor.alpha() : 255 ) );
}
break;
case QVariant::List:
case QVariant::StringList:
if ( ddProperties.isActive( QgsSymbolLayer::PropertyStrokeColor ) )
{
context.pushWarning( QObject::tr( "Could not set opacity of layer %1, opacity already defined in stroke color" ).arg( jsonLayer.value( QStringLiteral( "id" ) ).toString() ) );
}
else
{
ddProperties.setProperty( QgsSymbolLayer::PropertyStrokeColor, parseValueList( jsonLineOpacity.toList(), PropertyType::Opacity, context, 1, lineColor.isValid() ? lineColor.alpha() : 255 ) );
}
break;
default:
context.pushWarning( QObject::tr( "Skipping non-implemented opacity expression" ) );
break;
}
}
QVector< double > dashVector;
if ( jsonPaint.contains( QStringLiteral( "line-dasharray" ) ) )
{
const QVariant jsonLineDashArray = jsonPaint.value( QStringLiteral( "line-dasharray" ) );
switch ( jsonLineDashArray.type() )
{
case QVariant::Map:
{
//TODO improve parsing (use PropertyCustomDash?)
const QVariantList dashSource = jsonLineDashArray.toMap().value( QStringLiteral( "stops" ) ).toList().last().toList().value( 1 ).toList();
for ( const QVariant &v : dashSource )
{
dashVector << v.toDouble() * context.pixelSizeConversionFactor();
}
break;
}
case QVariant::List:
case QVariant::StringList:
{
const QVariantList dashSource = jsonLineDashArray.toList();
for ( const QVariant &v : dashSource )
{
dashVector << v.toDouble() * context.pixelSizeConversionFactor();
}
break;
}
default:
context.pushWarning( QObject::tr( "Skipping non-implemented dash vector expression" ) );
break;
}
}
Qt::PenCapStyle penCapStyle = Qt::FlatCap;
Qt::PenJoinStyle penJoinStyle = Qt::MiterJoin;
if ( jsonLayer.contains( QStringLiteral( "layout" ) ) )
{
const QVariantMap jsonLayout = jsonLayer.value( QStringLiteral( "layout" ) ).toMap();
if ( jsonLayout.contains( QStringLiteral( "line-cap" ) ) )
{
penCapStyle = parseCapStyle( jsonLayout.value( QStringLiteral( "line-cap" ) ).toString() );
}
if ( jsonLayout.contains( QStringLiteral( "line-join" ) ) )
{
penJoinStyle = parseJoinStyle( jsonLayout.value( QStringLiteral( "line-join" ) ).toString() );
}
}
std::unique_ptr< QgsSymbol > symbol( QgsSymbol::defaultSymbol( QgsWkbTypes::LineGeometry ) );
QgsSimpleLineSymbolLayer *lineSymbol = dynamic_cast< QgsSimpleLineSymbolLayer * >( symbol->symbolLayer( 0 ) );
// set render units
symbol->setOutputUnit( context.targetUnit() );
lineSymbol->setOutputUnit( context.targetUnit() );
lineSymbol->setPenCapStyle( penCapStyle );
lineSymbol->setPenJoinStyle( penJoinStyle );
lineSymbol->setDataDefinedProperties( ddProperties );
lineSymbol->setOffset( lineOffset );
lineSymbol->setOffsetUnit( context.targetUnit() );
if ( lineOpacity != -1 )
{
symbol->setOpacity( lineOpacity );
}
if ( lineColor.isValid() )
{
lineSymbol->setColor( lineColor );
}
if ( lineWidth != -1 )
{
lineSymbol->setWidth( lineWidth );
}
if ( !dashVector.empty() )
{
lineSymbol->setUseCustomDashPattern( true );
lineSymbol->setCustomDashVector( dashVector );
}
style.setGeometryType( QgsWkbTypes::LineGeometry );
style.setSymbol( symbol.release() );
return true;
}
void QgsMapBoxGlStyleConverter::parseSymbolLayer( const QVariantMap &jsonLayer, QgsVectorTileBasicRendererStyle &renderer, bool &hasRenderer, QgsVectorTileBasicLabelingStyle &labelingStyle, bool &hasLabeling, QgsMapBoxGlStyleConversionContext &context )
{
hasLabeling = false;
hasRenderer = false;
if ( !jsonLayer.contains( QStringLiteral( "layout" ) ) )
{
context.pushWarning( QObject::tr( "Style layer %1 has no layout property, skipping" ).arg( jsonLayer.value( QStringLiteral( "id" ) ).toString() ) );
return;
}
const QVariantMap jsonLayout = jsonLayer.value( QStringLiteral( "layout" ) ).toMap();
if ( !jsonLayout.contains( QStringLiteral( "text-field" ) ) )
{
hasRenderer = parseSymbolLayerAsRenderer( jsonLayer, renderer, context );
return;
}
if ( !jsonLayer.contains( QStringLiteral( "paint" ) ) )
{
context.pushWarning( QObject::tr( "Style layer %1 has no paint property, skipping" ).arg( jsonLayer.value( QStringLiteral( "id" ) ).toString() ) );
return;
}
const QVariantMap jsonPaint = jsonLayer.value( QStringLiteral( "paint" ) ).toMap();
QgsPropertyCollection ddLabelProperties;
double textSize = 16.0;
QString textSizeProperty;
if ( jsonLayout.contains( QStringLiteral( "text-size" ) ) )
{
const QVariant jsonTextSize = jsonLayout.value( QStringLiteral( "text-size" ) );
switch ( jsonTextSize.type() )
{
case QVariant::Int:
case QVariant::Double:
textSize = jsonTextSize.toDouble() * context.pixelSizeConversionFactor();
break;
case QVariant::Map:
textSize = -1;
textSizeProperty = parseInterpolateByZoom( jsonTextSize.toMap(), context, context.pixelSizeConversionFactor(), &textSize );
break;
case QVariant::List:
case QVariant::StringList:
textSize = -1;
textSizeProperty = parseValueList( jsonTextSize.toList(), PropertyType::Numeric, context, context.pixelSizeConversionFactor(), 255, nullptr, &textSize );
break;
default:
context.pushWarning( QObject::tr( "Skipping non-implemented text-size expression" ) );
break;
}
if ( !textSizeProperty.isEmpty() )
{
ddLabelProperties.setProperty( QgsPalLayerSettings::Size, textSizeProperty );
}
}
// em to character tends to underestimate, so scale up by ~40%
constexpr double EM_TO_CHARS = 1.4;
double textMaxWidth = -1;
if ( jsonLayout.contains( QStringLiteral( "text-max-width" ) ) )
{
const QVariant jsonTextMaxWidth = jsonLayout.value( QStringLiteral( "text-max-width" ) );
switch ( jsonTextMaxWidth.type() )
{
case QVariant::Int:
case QVariant::Double:
textMaxWidth = jsonTextMaxWidth.toDouble() * EM_TO_CHARS;
break;
case QVariant::Map:
ddLabelProperties.setProperty( QgsPalLayerSettings::AutoWrapLength, parseInterpolateByZoom( jsonTextMaxWidth.toMap(), context, EM_TO_CHARS, &textMaxWidth ) );
break;
case QVariant::List:
case QVariant::StringList:
ddLabelProperties.setProperty( QgsPalLayerSettings::AutoWrapLength, parseValueList( jsonTextMaxWidth.toList(), PropertyType::Numeric, context, EM_TO_CHARS, 255, nullptr, &textMaxWidth ) );
break;
default:
context.pushWarning( QObject::tr( "Skipping non-implemented text-max-width expression" ) );
break;
}
}
double textLetterSpacing = -1;
if ( jsonLayout.contains( QStringLiteral( "text-letter-spacing" ) ) )
{
const QVariant jsonTextLetterSpacing = jsonLayout.value( QStringLiteral( "text-letter-spacing" ) );
switch ( jsonTextLetterSpacing.type() )
{
case QVariant::Int:
case QVariant::Double:
textLetterSpacing = jsonTextLetterSpacing.toDouble();
break;
case QVariant::Map:
ddLabelProperties.setProperty( QgsPalLayerSettings::FontLetterSpacing, parseInterpolateByZoom( jsonTextLetterSpacing.toMap(), context, 1, &textLetterSpacing ) );
break;
case QVariant::List:
case QVariant::StringList:
ddLabelProperties.setProperty( QgsPalLayerSettings::FontLetterSpacing, parseValueList( jsonTextLetterSpacing.toList(), PropertyType::Numeric, context, 1, 255, nullptr, &textLetterSpacing ) );
break;
default:
context.pushWarning( QObject::tr( "Skipping non-implemented text-letter-spacing expression" ) );
break;
}
}
QFont textFont;
bool foundFont = false;
if ( jsonLayout.contains( QStringLiteral( "text-font" ) ) )
{
const QVariant jsonTextFont = jsonLayout.value( QStringLiteral( "text-font" ) );
if ( jsonTextFont.type() != QVariant::List && jsonTextFont.type() != QVariant::StringList && jsonTextFont.type() != QVariant::String )
{
context.pushWarning( QObject::tr( "Skipping non-implemented text-font expression" ) );
}
else
{
QString fontName;
switch ( jsonTextFont.type() )
{
case QVariant::List:
case QVariant::StringList:
fontName = jsonTextFont.toList().value( 0 ).toString();
break;
case QVariant::String:
fontName = jsonTextFont.toString();
break;
default:
break;
}
const QStringList textFontParts = fontName.split( ' ' );
for ( int i = 1; i < textFontParts.size(); ++i )
{
const QString candidateFontName = textFontParts.mid( 0, i ).join( ' ' );
const QString candidateFontStyle = textFontParts.mid( i ).join( ' ' );
if ( QgsFontUtils::fontFamilyHasStyle( candidateFontName, candidateFontStyle ) )
{
textFont = QFont( candidateFontName );
textFont.setStyleName( candidateFontStyle );
foundFont = true;
break;
}
}
if ( !foundFont )
{
// probably won't work, but we'll try anyway... maybe the json isn't following the spec correctly!!
textFont = QFont( fontName );
foundFont = true;
}
}
}
// text color
QColor textColor;
if ( jsonPaint.contains( QStringLiteral( "text-color" ) ) )
{
const QVariant jsonTextColor = jsonPaint.value( QStringLiteral( "text-color" ) );
switch ( jsonTextColor.type() )
{
case QVariant::Map:
ddLabelProperties.setProperty( QgsPalLayerSettings::Color, parseInterpolateColorByZoom( jsonTextColor.toMap(), context, &textColor ) );
break;
case QVariant::List:
case QVariant::StringList:
ddLabelProperties.setProperty( QgsPalLayerSettings::Color, parseValueList( jsonTextColor.toList(), PropertyType::Color, context, 1, 255, &textColor ) );
break;
case QVariant::String:
textColor = parseColor( jsonTextColor.toString(), context );
break;
default:
context.pushWarning( QObject::tr( "Skipping non-implemented text-color expression" ) );
break;
}
}
// buffer color
QColor bufferColor;
if ( jsonPaint.contains( QStringLiteral( "text-halo-color" ) ) )
{
const QVariant jsonBufferColor = jsonPaint.value( QStringLiteral( "text-halo-color" ) );
switch ( jsonBufferColor.type() )
{
case QVariant::Map:
ddLabelProperties.setProperty( QgsPalLayerSettings::BufferColor, parseInterpolateColorByZoom( jsonBufferColor.toMap(), context, &bufferColor ) );
break;
case QVariant::List:
case QVariant::StringList:
ddLabelProperties.setProperty( QgsPalLayerSettings::BufferColor, parseValueList( jsonBufferColor.toList(), PropertyType::Color, context, 1, 255, &bufferColor ) );
break;
case QVariant::String:
bufferColor = parseColor( jsonBufferColor.toString(), context );
break;
default:
context.pushWarning( QObject::tr( "Skipping non-implemented text-halo-color expression" ) );
break;
}
}
double bufferSize = 0.0;
if ( jsonPaint.contains( QStringLiteral( "text-halo-width" ) ) )
{
const QVariant jsonHaloWidth = jsonPaint.value( QStringLiteral( "text-halo-width" ) );
switch ( jsonHaloWidth.type() )
{
case QVariant::Int:
case QVariant::Double:
bufferSize = jsonHaloWidth.toDouble() * context.pixelSizeConversionFactor();
break;
case QVariant::Map:
bufferSize = 1;
ddLabelProperties.setProperty( QgsPalLayerSettings::BufferSize, parseInterpolateByZoom( jsonHaloWidth.toMap(), context, context.pixelSizeConversionFactor(), &bufferSize ) );
break;
case QVariant::List:
case QVariant::StringList:
bufferSize = 1;
ddLabelProperties.setProperty( QgsPalLayerSettings::BufferSize, parseValueList( jsonHaloWidth.toList(), PropertyType::Numeric, context, context.pixelSizeConversionFactor(), 255, nullptr, &bufferSize ) );
break;
default:
context.pushWarning( QObject::tr( "Skipping non-implemented text-halo-width expression" ) );
break;
}
}
double haloBlurSize = 0;
if ( jsonPaint.contains( QStringLiteral( "text-halo-blur" ) ) )
{
const QVariant jsonTextHaloBlur = jsonPaint.value( QStringLiteral( "text-halo-blur" ) );
switch ( jsonTextHaloBlur.type() )
{
case QVariant::Int:
case QVariant::Double:
{
haloBlurSize = jsonTextHaloBlur.toDouble() * context.pixelSizeConversionFactor();
break;
}
default:
context.pushWarning( QObject::tr( "Skipping non-implemented text-halo-width expression" ) );
break;
}
}
QgsTextFormat format;
format.setSizeUnit( context.targetUnit() );
if ( textColor.isValid() )
format.setColor( textColor );
if ( textSize >= 0 )
format.setSize( textSize );
if ( foundFont )
format.setFont( textFont );
if ( textLetterSpacing > 0 )
{
QFont f = format.font();
f.setLetterSpacing( QFont::AbsoluteSpacing, textLetterSpacing );
format.setFont( f );
}
if ( bufferSize > 0 )
{
format.buffer().setEnabled( true );
format.buffer().setSize( bufferSize );
format.buffer().setSizeUnit( context.targetUnit() );
format.buffer().setColor( bufferColor );
if ( haloBlurSize > 0 )
{
QgsEffectStack *stack = new QgsEffectStack();
QgsBlurEffect *blur = new QgsBlurEffect() ;
blur->setEnabled( true );
blur->setBlurUnit( context.targetUnit() );
blur->setBlurLevel( haloBlurSize );
blur->setBlurMethod( QgsBlurEffect::StackBlur );
stack->appendEffect( blur );
stack->setEnabled( true );
format.buffer().setPaintEffect( stack );
}
}
QgsPalLayerSettings labelSettings;
if ( textMaxWidth > 0 )
{
labelSettings.autoWrapLength = textMaxWidth;
}
// convert field name
auto processLabelField = []( const QString & string, bool & isExpression )->QString
{
// {field_name} is permitted in string -- if multiple fields are present, convert them to an expression
// but if single field is covered in {}, return it directly
const QRegularExpression singleFieldRx( QStringLiteral( "^{([^}]+)}$" ) );
QRegularExpressionMatch match = singleFieldRx.match( string );
if ( match.hasMatch() )
{
isExpression = false;
return match.captured( 1 );
}
const QRegularExpression multiFieldRx( QStringLiteral( "(?={[^}]+})" ) );
const QStringList parts = string.split( multiFieldRx );
if ( parts.size() > 1 )
{
isExpression = true;
QStringList res;
for ( const QString &part : parts )
{
if ( part.isEmpty() )
continue;
// part will start at a {field} reference
const QStringList split = part.split( '}' );
res << QgsExpression::quotedColumnRef( split.at( 0 ).mid( 1 ) );
if ( !split.at( 1 ).isEmpty() )
res << QgsExpression::quotedValue( split.at( 1 ) );
}
return QStringLiteral( "concat(%1)" ).arg( res.join( ',' ) );
}
else
{
isExpression = false;
return string;
}
};
if ( jsonLayout.contains( QStringLiteral( "text-field" ) ) )
{
const QVariant jsonTextField = jsonLayout.value( QStringLiteral( "text-field" ) );
switch ( jsonTextField.type() )
{
case QVariant::String:
{
labelSettings.fieldName = processLabelField( jsonTextField.toString(), labelSettings.isExpression );
break;
}
case QVariant::List:
case QVariant::StringList:
{
const QVariantList textFieldList = jsonTextField.toList();
/*
* e.g.
* "text-field": ["format",
* "foo", { "font-scale": 1.2 },
* "bar", { "font-scale": 0.8 }
* ]
*/
if ( textFieldList.size() > 2 && textFieldList.at( 0 ).toString() == QLatin1String( "format" ) )
{
QStringList parts;
for ( int i = 1; i < textFieldList.size(); ++i )
{
bool isExpression = false;
const QString part = processLabelField( textFieldList.at( i ).toString(), isExpression );
if ( !isExpression )
parts << QgsExpression::quotedColumnRef( part );
else
parts << part;
// TODO -- we could also translate font color, underline, overline, strikethrough to HTML tags!
i += 1;
}
labelSettings.fieldName = QStringLiteral( "concat(%1)" ).arg( parts.join( ',' ) );
labelSettings.isExpression = true;
}
else
{
/*
* e.g.
* "text-field": ["to-string", ["get", "name"]]
*/
labelSettings.fieldName = parseExpression( textFieldList, context );
labelSettings.isExpression = true;
}
break;