File indexing completed on 2025-01-05 03:59:02

 // SPDX-License-Identifier: LGPL-2.1-or-later
 //
 // SPDX-FileCopyrightText: 2009 Andrew Manson <g.real.ate@gmail.com>
 //
 
 #include "GeoLineStringGraphicsItem.h"
 
 #include <qmath.h>
 #include <QPainterPathStroker>
 
 #include <klocalizedstring.h>
 
 #include "GeoDataLineStyle.h"
 #include "GeoDataLabelStyle.h"
 #include "GeoDataPlacemark.h"
 #include "GeoDataPolyStyle.h"
 #include "GeoPainter.h"
 #include "StyleBuilder.h"
 #include "ViewportParams.h"
 #include "GeoDataStyle.h"
 #include "GeoDataColorStyle.h"
 #include "OsmPlacemarkData.h"
 
 #include "digikam_debug.h"
 
 namespace Marble
 {
 
 const GeoDataStyle *GeoLineStringGraphicsItem::s_previousStyle = nullptr;
 bool GeoLineStringGraphicsItem::s_paintInline = true;
 bool GeoLineStringGraphicsItem::s_paintOutline = true;
 
 GeoLineStringGraphicsItem::GeoLineStringGraphicsItem(const GeoDataPlacemark *placemark,
                                                      const GeoDataLineString *lineString) :
     GeoGraphicsItem(placemark),
     m_lineString(lineString),
     m_renderLineString(lineString),
     m_renderLabel(false),
     m_penWidth(0.0),
     m_name(placemark->name())
 {
     QString const category = StyleBuilder::visualCategoryName(placemark->visualCategory());
     QStringList paintLayers;
     paintLayers << QLatin1String("LineString/") + category + QLatin1String("/outline");
     paintLayers << QLatin1String("LineString/") + category + QLatin1String("/inline");
     if (!m_name.isEmpty()) {
         paintLayers << QLatin1String("LineString/") + category + QLatin1String("/label");
     }
     setPaintLayers(paintLayers);
 }
 
 GeoLineStringGraphicsItem::~GeoLineStringGraphicsItem()
 {
     qDeleteAll(m_cachedPolygons);
 }
 
 
 void GeoLineStringGraphicsItem::setLineString( const GeoDataLineString* lineString )
 {
     m_lineString = lineString;
     m_renderLineString = lineString;
 }
 
 const GeoDataLineString *GeoLineStringGraphicsItem::lineString() const
 {
     return m_lineString;
 }
 
 GeoDataLineString GeoLineStringGraphicsItem::merge(const QVector<const GeoDataLineString *> &lineStrings_)
 {
     if (lineStrings_.isEmpty()) {
         return GeoDataLineString();
     }
 
     Q_ASSERT(!lineStrings_.isEmpty());
     auto lineStrings = lineStrings_;
     GeoDataLineString result = *lineStrings.first();
     lineStrings.pop_front();
     for (bool matched = true; matched && !lineStrings.isEmpty();) {
         matched = false;
         for (auto lineString: lineStrings) {
             if (canMerge(result.first(), lineString->first())) {
                 result.remove(0);
                 result.reverse();
                 result << *lineString;
                 lineStrings.removeOne(lineString);
                 matched = true;
                 break;
             } else if (canMerge(result.last(), lineString->first())) {
                 result.remove(result.size()-1);
                 result << *lineString;
                 lineStrings.removeOne(lineString);
                 matched = true;
                 break;
             } else if (canMerge(result.first(), lineString->last())) {
                 GeoDataLineString behind = result;
                 result = *lineString;
                 behind.remove(0);
                 result << behind;
                 lineStrings.removeOne(lineString);
                 matched = true;
                 break;
             } else if (canMerge(result.last(), lineString->last())) {
                 GeoDataLineString behind = *lineString;
                 behind.reverse();
                 behind.remove(0);
                 result << behind;
                 lineStrings.removeOne(lineString);
                 matched = true;
                 break;
             }
         }
 
         if (!matched) {
             return GeoDataLineString();
         }
     }
     return lineStrings.isEmpty() ? result : GeoDataLineString();
 }
 
 void GeoLineStringGraphicsItem::setMergedLineString(const GeoDataLineString &mergedLineString)
 {
     m_mergedLineString = mergedLineString;
     m_renderLineString = mergedLineString.isEmpty() ? m_lineString : &m_mergedLineString;
 }
 
 const GeoDataLatLonAltBox& GeoLineStringGraphicsItem::latLonAltBox() const
 {
     return m_renderLineString->latLonAltBox();
 }
 
 void GeoLineStringGraphicsItem::paint(GeoPainter* painter, const ViewportParams* viewport , const QString &layer, int tileLevel)
 {
     setRenderContext(RenderContext(tileLevel));
 
     if (layer.endsWith(QLatin1String("/outline"))) {
         qDeleteAll(m_cachedPolygons);
         m_cachedPolygons.clear();
         m_cachedRegion = QRegion();
         painter->polygonsFromLineString(*m_renderLineString, m_cachedPolygons);
         if (m_cachedPolygons.empty()) {
             return;
         }
         if (painter->mapQuality() == HighQuality || painter->mapQuality() == PrintQuality) {
             paintOutline(painter, viewport);
         }
     } else if (layer.endsWith(QLatin1String("/inline"))) {
         if (m_cachedPolygons.empty()) {
             return;
         }
         paintInline(painter, viewport);
     } else if (layer.endsWith(QLatin1String("/label"))) {
         if (!m_cachedPolygons.empty()) {
             if (m_renderLabel) {
                 paintLabel(painter, viewport);
             }
         }
     } else {
         qDeleteAll(m_cachedPolygons);
         m_cachedPolygons.clear();
         m_cachedRegion = QRegion();
         painter->polygonsFromLineString(*m_renderLineString, m_cachedPolygons);
         if (m_cachedPolygons.empty()) {
             return;
         }
         if (s_previousStyle != style().data()) {
             configurePainterForLine(painter, viewport, false);
         }
         s_previousStyle = style().data();
         for(const QPolygonF* itPolygon: m_cachedPolygons) {
             painter->drawPolyline(*itPolygon);
         }
     }
 }
 
 bool GeoLineStringGraphicsItem::contains(const QPoint &screenPosition, const ViewportParams *) const
 {
     if (m_penWidth <= 0.0) {
         return false;
     }
 
     if (m_cachedRegion.isNull()) {
         QPainterPath painterPath;
         for (auto polygon: m_cachedPolygons) {
             painterPath.addPolygon(*polygon);
         }
         QPainterPathStroker stroker;
         qreal const margin = 6.0;
         stroker.setWidth(m_penWidth + margin);
         QPainterPath strokePath = stroker.createStroke(painterPath);
         m_cachedRegion = QRegion(strokePath.toFillPolygon().toPolygon(), Qt::WindingFill);
     }
     return m_cachedRegion.contains(screenPosition);
 }
 
 void GeoLineStringGraphicsItem::handleRelationUpdate(const QVector<const GeoDataRelation *> &relations)
 {
     QHash<GeoDataRelation::RelationType, QStringList> names;
     for (auto relation: relations) {
         auto const ref = relation->osmData().tagValue(QStringLiteral("ref"));
         if (relation->isVisible() && !ref.isEmpty()) {
             names[relation->relationType()] << ref;
         }
     }
     if (names.isEmpty()) {
         m_name = feature()->name();
     } else {
         QStringList namesList;
         for (auto iter = names.begin(); iter != names.end(); ++iter) {
             QString value;
             switch (iter.key()) {
             case GeoDataRelation::UnknownType:
             case GeoDataRelation::RouteRoad: break;
             case GeoDataRelation::RouteDetour: value = i18n("Detour"); break;
             case GeoDataRelation::RouteFerry: value = i18n("Ferry Route"); break;
             case GeoDataRelation::RouteTrain: value = i18n("Train"); break;
             case GeoDataRelation::RouteSubway: value = i18n("Subway"); break;
             case GeoDataRelation::RouteTram: value = i18n("Tram"); break;
             case GeoDataRelation::RouteBus: value = i18n("Bus"); break;
             case GeoDataRelation::RouteTrolleyBus: value = i18n("Trolley Bus"); break;
             case GeoDataRelation::RouteBicycle: value = i18n("Bicycle Route"); break;
             case GeoDataRelation::RouteMountainbike: value = i18n("Mountainbike Route"); break;
             case GeoDataRelation::RouteFoot: value = i18n("Walking Route"); break;
             case GeoDataRelation::RouteHiking: value = i18n("Hiking Route"); break;
             case GeoDataRelation::RouteHorse: value = i18n("Bridleway"); break;
             case GeoDataRelation::RouteInlineSkates: value = i18n("Inline Skates Route"); break;
             case GeoDataRelation::RouteSkiDownhill: value = i18n("Downhill Piste"); break;
             case GeoDataRelation::RouteSkiNordic: value = i18n("Nordic Ski Trail"); break;
             case GeoDataRelation::RouteSkitour: value = i18n("Skitour"); break;
             case GeoDataRelation::RouteSled: value = i18n("Sled Trail"); break;
             }
 
             QStringList &references = iter.value();
             std::sort(references.begin(), references.end());
             auto const last = std::unique(references.begin(), references.end());
             references.erase(last, references.end());
             auto const routes = references.join(QLatin1String(", "));
             namesList << (value.isEmpty() ? routes : QStringLiteral("%1 %2").arg(value, routes));
         }
         auto const allRoutes = namesList.join(QStringLiteral("; "));
         if (feature()->name().isEmpty()) {
             m_name = allRoutes;
         } else {
             m_name = QStringLiteral("%1 (%2)").arg(feature()->name(), allRoutes);
         }
     }
 }
 
 void GeoLineStringGraphicsItem::paintInline(GeoPainter* painter, const ViewportParams* viewport)
 {
     if ( ( !viewport->resolves( m_renderLineString->latLonAltBox(), 2) ) ) {
         return;
     }
 
     if (s_previousStyle != style().data()) {
         s_paintInline = configurePainterForLine(painter, viewport, false);
     }
     s_previousStyle = style().data();
 
     if (s_paintInline) {
       m_renderLabel = painter->pen().widthF() >= 6.0f;
       m_penWidth = painter->pen().widthF();
       for(const QPolygonF* itPolygon: m_cachedPolygons) {
           painter->drawPolyline(*itPolygon);
       }
     }
 }
 
 void GeoLineStringGraphicsItem::paintOutline(GeoPainter *painter, const ViewportParams *viewport) const
 {
     if ( ( !viewport->resolves( m_renderLineString->latLonAltBox(), 2) ) ) {
         return;
     }
 
     if (s_previousStyle != style().data()) {
         s_paintOutline = configurePainterForLine(painter, viewport, true);
     }
     s_previousStyle = style().data();
 
     if (s_paintOutline) {
         for(const QPolygonF* itPolygon: m_cachedPolygons) {
             painter->drawPolyline(*itPolygon);
         }
     }
 
 }
 
 void GeoLineStringGraphicsItem::paintLabel(GeoPainter *painter, const ViewportParams *viewport) const
 {
     if ( ( !viewport->resolves( m_renderLineString->latLonAltBox(), 2) ) ) {
         return;
     }
 
     LabelPositionFlags labelPositionFlags = NoLabel;
     bool isValid  = configurePainterForLabel(painter, viewport, labelPositionFlags);
 
     if (isValid) {
         GeoDataStyle::ConstPtr style = this->style();
 
         // Activate the lines below to paint a label background which
         // prevents antialiasing overpainting glitches, but leads to
         // other glitches.
         //QColor const color = style->polyStyle().paintedColor();
         //painter->setBackground(QBrush(color));
         //painter->setBackgroundMode(Qt::OpaqueMode);
 
         const GeoDataLabelStyle& labelStyle = style->labelStyle();
         painter->drawLabelsForPolygons(m_cachedPolygons, m_name, FollowLine,
                                labelStyle.paintedColor());
     }
 }
 
 
 bool  GeoLineStringGraphicsItem::configurePainterForLine(GeoPainter *painter, const ViewportParams *viewport, const bool isOutline) const
 {
     QPen currentPen = painter->pen();
     GeoDataStyle::ConstPtr style = this->style();
     if (!style) {
         painter->setPen( QPen() );
         painter->setBackground(QBrush(Qt::transparent));
         painter->setBackgroundMode(Qt::TransparentMode);
     }
     else {
         if (isOutline && !style->polyStyle().outline()) {
             return false;
         }
 
         const GeoDataLineStyle& lineStyle = style->lineStyle();
 
         // To save performance we avoid making changes to the painter's pen.
         // So we first take a copy of the actual painter pen, make changes to it
         // and only if the resulting pen is different from the actual pen
         // we replace the painter's pen with our new pen.
 
         // We want to avoid the mandatory detach in QPen::setColor(),
         // so we carefully check whether applying the setter is needed
         const QColor linePaintedColor = (!isOutline && (lineStyle.cosmeticOutline() && lineStyle.penStyle() == Qt::SolidLine))
                                         ? style->polyStyle().paintedColor()
                                         : lineStyle.paintedColor();
         if (currentPen.color() != linePaintedColor) {
             if (linePaintedColor.alpha() == 255) {
                 currentPen.setColor(linePaintedColor);
             }
             else {
                 if ( painter->mapQuality() != Marble::HighQuality
                         && painter->mapQuality() != Marble::PrintQuality ) {
                     QColor penColor = linePaintedColor;
                     if (penColor.alpha() != 0) {
                         penColor.setAlpha( 255 );
                     }
                     if (currentPen.color() != penColor) {
                         currentPen.setColor( penColor );
                     }
                 }
                 else {
                     currentPen.setColor(linePaintedColor);
                 }
             }
         }
 
         const float lineWidth = lineStyle.width();
         const float linePhysicalWidth = lineStyle.physicalWidth();
         float newLineWidth = lineWidth;
         if (linePhysicalWidth != 0.0) {
           const float scaledLinePhysicalWidth = float(viewport->radius()) / EARTH_RADIUS * linePhysicalWidth;
           newLineWidth = scaledLinePhysicalWidth > lineWidth
                          ? scaledLinePhysicalWidth
                          : lineWidth;
         }
 
         if (!isOutline && lineStyle.cosmeticOutline() && lineStyle.penStyle() == Qt::SolidLine) {
             if (newLineWidth > 2.5) {
               newLineWidth -= 2.0;
             }
         }
 
         const qreal lineDrawThreshold = isOutline ? 2.5 : 0.5;
 
         // We want to avoid the mandatory detach in QPen::setWidthF(),
         // so we carefully check whether applying the setter is needed
         if (currentPen.widthF() != newLineWidth && newLineWidth != 0.0) {
           if (newLineWidth < lineDrawThreshold) {
               if (painter->pen().style() != Qt::NoPen) {
                   painter->setPen(Qt::NoPen);
               }
               return false; // Don't draw any outline and abort painter configuration early
           }
           currentPen.setWidthF(newLineWidth);
         }
 
         // No need to avoid detaches inside QPen::setCapsStyle() since Qt does that for us
         const Qt::PenCapStyle lineCapStyle = lineStyle.capStyle();
         currentPen.setCapStyle(lineCapStyle);
 
         // No need to avoid detaches inside QPen::setStyle() since Qt does that for us
         if (painter->mapQuality() == HighQuality || painter->mapQuality() == PrintQuality) {
             const Qt::PenStyle linePenStyle = lineStyle.penStyle();
             currentPen.setStyle(linePenStyle);
 
             if (linePenStyle == Qt::CustomDashLine) {
                 // We want to avoid the mandatory detach in QPen::setDashPattern(),
                 // so we carefully check whether applying the setter is needed
                 if (currentPen.dashPattern() != lineStyle.dashPattern()) {
                   currentPen.setDashPattern(lineStyle.dashPattern());
                 }
             }
         } else {
             currentPen.setStyle(Qt::SolidLine);
         }
 
         if ( painter->pen() != currentPen ) {
             painter->setPen( currentPen );
         }
 
         // Set the background
 
         if (!isOutline) {
           if (lineStyle.background()) {
               QBrush brush = painter->background();
               brush.setColor(style->polyStyle().paintedColor());
               painter->setBackground( brush );
 
               painter->setBackgroundMode( Qt::OpaqueMode );
           }
           else {
               painter->setBackground(QBrush(Qt::transparent));
               painter->setBackgroundMode(Qt::TransparentMode);
           }
         }
         else {
             painter->setBackground(QBrush(Qt::transparent));
             painter->setBackgroundMode(Qt::TransparentMode);
         }
     }
 
     return true;
 }
 
 bool GeoLineStringGraphicsItem::configurePainterForLabel(GeoPainter *painter,  const ViewportParams *viewport, LabelPositionFlags &labelPositionFlags) const
 {
   QPen currentPen = painter->pen();
   GeoDataStyle::ConstPtr style = this->style();
   if (!style) {
       painter->setPen( QPen() );
   }
   else {
       const GeoDataLineStyle& lineStyle = style->lineStyle();
 
       // To save performance we avoid making changes to the painter's pen.
       // So we first take a copy of the actual painter pen, make changes to it
       // and only if the resulting pen is different from the actual pen
       // we replace the painter's pen with our new pen.
 
       // We want to avoid the mandatory detach in QPen::setColor(),
       // so we carefully check whether applying the setter is needed
 
       const float lineWidth = lineStyle.width();
       const float linePhysicalWidth = lineStyle.physicalWidth();
       float newLineWidth = lineWidth;
       if (linePhysicalWidth != 0.0) {
         const float scaledLinePhysicalWidth = float(viewport->radius()) / EARTH_RADIUS * linePhysicalWidth;
         newLineWidth = scaledLinePhysicalWidth > lineWidth
                        ? scaledLinePhysicalWidth
                        : lineWidth;
       }
 
       // We want to avoid the mandatory detach in QPen::setWidthF(),
       // so we carefully check whether applying the setter is needed
       if (currentPen.widthF() != newLineWidth && newLineWidth != 0.0) {
         if (newLineWidth < 6.0) {
             return false; // Don't draw any labels and abort painter configuration early
         }
         currentPen.setWidthF(newLineWidth);
       }
 
 
       if ( painter->pen() != currentPen ) {
           painter->setPen( currentPen );
       }
 //        else qCDebug(DIGIKAM_MARBLE_LOG) << "Detach and painter change successfully Avoided!" << Q_FUNC_INFO;
 
       if (painter->brush().color() != Qt::transparent) {
           painter->setBrush(QColor(Qt::transparent));
       }
       if (painter->backgroundMode() == Qt::OpaqueMode) {
           painter->setBackgroundMode(Qt::TransparentMode);
           painter->setBackground(QBrush(Qt::transparent));
       }
 
       // label styles
       const GeoDataLabelStyle& labelStyle = style->labelStyle();
       painter->setFont(labelStyle.font() );
       switch (labelStyle.alignment()) {
       case GeoDataLabelStyle::Corner:
       case GeoDataLabelStyle::Right:
           labelPositionFlags |= LineStart;
           break;
       case GeoDataLabelStyle::Center:
           labelPositionFlags |= LineCenter;
           break;
       }
   }
 
   return true;
 }
 
 bool GeoLineStringGraphicsItem::canMerge(const GeoDataCoordinates &a, const GeoDataCoordinates &b)
 {
     return a.sphericalDistanceTo(b) * EARTH_RADIUS < 0.1;
 }
 
 }