diff options
Diffstat (limited to 'platform/qt/src/qt_geojson.cpp')
-rw-r--r-- | platform/qt/src/qt_geojson.cpp | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/platform/qt/src/qt_geojson.cpp b/platform/qt/src/qt_geojson.cpp new file mode 100644 index 0000000000..80377de64d --- /dev/null +++ b/platform/qt/src/qt_geojson.cpp @@ -0,0 +1,166 @@ +#include "qt_geojson.hpp" +#include <mapbox/geojson.hpp> +#include <mbgl/util/geometry.hpp> +#include <mbgl/util/feature.hpp> + +namespace QMapbox { + +mbgl::Point<double> asMapboxGLPoint(const QMapbox::Coordinate &coordinate) { + return mbgl::Point<double> { coordinate.second, coordinate.first }; +} + +mbgl::MultiPoint<double> asMapboxGLMultiPoint(const QMapbox::Coordinates &multiPoint) { + mbgl::MultiPoint<double> mbglMultiPoint; + mbglMultiPoint.reserve(multiPoint.size()); + for (const auto &point: multiPoint) { + mbglMultiPoint.emplace_back(asMapboxGLPoint(point)); + } + return mbglMultiPoint; +}; + +mbgl::LineString<double> asMapboxGLLineString(const QMapbox::Coordinates &lineString) { + mbgl::LineString<double> mbglLineString; + mbglLineString.reserve(lineString.size()); + for (const auto &coordinate : lineString) { + mbglLineString.emplace_back(asMapboxGLPoint(coordinate)); + } + return mbglLineString; +}; + +mbgl::MultiLineString<double> asMapboxGLMultiLineString(const QMapbox::CoordinatesCollection &multiLineString) { + mbgl::MultiLineString<double> mbglMultiLineString; + mbglMultiLineString.reserve(multiLineString.size()); + for (const auto &lineString : multiLineString) { + mbglMultiLineString.emplace_back(std::forward<mbgl::LineString<double>>(asMapboxGLLineString(lineString))); + } + return mbglMultiLineString; +}; + +mbgl::Polygon<double> asMapboxGLPolygon(const QMapbox::CoordinatesCollection &polygon) { + mbgl::Polygon<double> mbglPolygon; + mbglPolygon.reserve(polygon.size()); + for (const auto &linearRing : polygon) { + mbgl::LinearRing<double> mbglLinearRing; + mbglLinearRing.reserve(linearRing.size()); + for (const auto &coordinate: linearRing) { + mbglLinearRing.emplace_back(asMapboxGLPoint(coordinate)); + } + mbglPolygon.emplace_back(std::move(mbglLinearRing)); + } + return mbglPolygon; +}; + +mbgl::MultiPolygon<double> asMapboxGLMultiPolygon(const QMapbox::CoordinatesCollections &multiPolygon) { + mbgl::MultiPolygon<double> mbglMultiPolygon; + mbglMultiPolygon.reserve(multiPolygon.size()); + for (const auto &polygon : multiPolygon) { + mbglMultiPolygon.emplace_back(std::forward<mbgl::Polygon<double>>(asMapboxGLPolygon(polygon))); + } + return mbglMultiPolygon; +}; + +mbgl::Value asMapboxGLPropertyValue(const QVariant &value) { + auto valueList = [](const QVariantList &list) { + std::vector<mbgl::Value> mbglList; + mbglList.reserve(list.size()); + for (const auto& listValue : list) { + mbglList.emplace_back(asMapboxGLPropertyValue(listValue)); + } + return mbglList; + }; + + auto valueMap = [](const QVariantMap &map) { + std::unordered_map<std::string, mbgl::Value> mbglMap; + mbglMap.reserve(map.size()); + auto it = map.constBegin(); + while (it != map.constEnd()) { + mbglMap.emplace(std::make_pair(it.key().toStdString(), asMapboxGLPropertyValue(it.value()))); + ++it; + } + return mbglMap; + }; + + switch (value.type()) { +#if QT_VERSION >= 0x050000 + case QMetaType::UnknownType: +#else + case QVariant::Invalid: +#endif + return mbgl::NullValue {}; + case QMetaType::Bool: + return { value.toBool() }; + case QMetaType::ULongLong: + return { uint64_t(value.toULongLong()) }; + case QMetaType::LongLong: + return { int64_t(value.toLongLong()) }; + case QMetaType::Double: + return { value.toDouble() }; + case QMetaType::QString: + return { value.toString().toStdString() }; + case QMetaType::QVariantList: + return valueList(value.toList()); + case QMetaType::QVariantMap: + return valueMap(value.toMap()); + default: + qWarning() << "Unsupported feature property value:" << value; + return {}; + } +} + +mbgl::FeatureIdentifier asMapboxGLFeatureIdentifier(const QVariant &id) { + switch (id.type()) { +#if QT_VERSION >= 0x050000 + case QMetaType::UnknownType: +#else + case QVariant::Invalid: +#endif + return {}; + case QMetaType::ULongLong: + return { uint64_t(id.toULongLong()) }; + case QMetaType::LongLong: + return { int64_t(id.toLongLong()) }; + case QMetaType::Double: + return { id.toDouble() }; + case QMetaType::QString: + return { id.toString().toStdString() }; + default: + qWarning() << "Unsupported feature identifier:" << id; + return {}; + } +} + +mbgl::Feature asMapboxGLFeature(const QMapbox::Feature &feature) { + mbgl::PropertyMap properties; + properties.reserve(feature.properties.size()); + auto it = feature.properties.constBegin(); + while (it != feature.properties.constEnd()) { + properties.emplace(std::make_pair(it.key().toStdString(), asMapboxGLPropertyValue(it.value()))); + } + + mbgl::FeatureIdentifier id = asMapboxGLFeatureIdentifier(feature.id); + + if (feature.type == QMapbox::Feature::PointType) { + const QMapbox::Coordinates &points = feature.geometry.first().first(); + if (points.size() == 1) { + return { asMapboxGLPoint(points.first()), std::move(properties), std::move(id) }; + } else { + return { asMapboxGLMultiPoint(points), std::move(properties), std::move(id) }; + } + } else if (feature.type == QMapbox::Feature::LineStringType) { + const QMapbox::CoordinatesCollection &lineStrings = feature.geometry.first(); + if (lineStrings.size() == 1) { + return { asMapboxGLLineString(lineStrings.first()), std::move(properties), std::move(id) }; + } else { + return { asMapboxGLMultiLineString(lineStrings), std::move(properties), std::move(id) }; + } + } else { // PolygonType + const QMapbox::CoordinatesCollections &polygons = feature.geometry; + if (polygons.size() == 1) { + return { asMapboxGLPolygon(polygons.first()), std::move(properties), std::move(id) }; + } else { + return { asMapboxGLMultiPolygon(polygons), std::move(properties), std::move(id) }; + } + } +}; + +} // namespace QMapbox |