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#pragma once
#include <mbgl/style/conversion.hpp>
#include <mbgl/style/conversion/geojson.hpp>
#include <mbgl/util/optional.hpp>
#include <QVariant>
#include <QColor>
#include <QMapbox>
#include "qt_geojson.hpp"
namespace mbgl {
namespace style {
namespace conversion {
template <>
class ConversionTraits<QVariant> {
public:
static bool isUndefined(const QVariant& value) {
return value.isNull() || !value.isValid();
}
static bool isArray(const QVariant& value) {
return value.canConvert(QVariant::List);
}
static std::size_t arrayLength(const QVariant& value) {
return value.toList().size();
}
static QVariant arrayMember(const QVariant& value, std::size_t i) {
return value.toList()[i];
}
static bool isObject(const QVariant& value) {
return value.canConvert(QVariant::Map)
|| value.type() == QVariant::ByteArray
#if QT_VERSION >= 0x050000
|| QString(value.typeName()) == QStringLiteral("QMapbox::Feature");
#else
|| QString(value.typeName()) == QString("QMapbox::Feature");
#endif
}
static optional<QVariant> objectMember(const QVariant& value, const char* key) {
auto map = value.toMap();
auto iter = map.constFind(key);
if (iter != map.constEnd()) {
return iter.value();
} else {
return {};
}
}
template <class Fn>
static optional<Error> eachMember(const QVariant& value, Fn&& fn) {
auto map = value.toMap();
auto iter = map.constBegin();
while (iter != map.constEnd()) {
optional<Error> result = fn(iter.key().toStdString(), QVariant(iter.value()));
if (result) {
return result;
}
++iter;
}
return {};
}
static optional<bool> toBool(const QVariant& value) {
if (value.type() == QVariant::Bool) {
return value.toBool();
} else {
return {};
}
}
static optional<float> toNumber(const QVariant& value) {
if (value.type() == QVariant::Int || value.type() == QVariant::Double) {
return value.toFloat();
} else {
return {};
}
}
static optional<double> toDouble(const QVariant& value) {
if (value.type() == QVariant::Int || value.type() == QVariant::Double) {
return value.toDouble();
} else {
return {};
}
}
static optional<std::string> toString(const QVariant& value) {
if (value.type() == QVariant::String) {
return value.toString().toStdString();
} else if (value.type() == QVariant::Color) {
return value.value<QColor>().name().toStdString();
} else {
return {};
}
}
static optional<Value> toValue(const QVariant& value) {
if (value.type() == QVariant::Bool) {
return { value.toBool() };
} else if (value.type() == QVariant::String) {
return { value.toString().toStdString() };
} else if (value.type() == QVariant::Color) {
return { value.value<QColor>().name().toStdString() };
} else if (value.type() == QVariant::Int) {
return { int64_t(value.toInt()) };
} else if (value.canConvert(QVariant::Double)) {
return { value.toDouble() };
} else {
return {};
}
}
static optional<GeoJSON> toGeoJSON(const QVariant& value, Error& error) {
#if QT_VERSION >= 0x050000
if (value.typeName() == QStringLiteral("QMapbox::Feature")) {
#else
if (value.typeName() == QString("QMapbox::Feature")) {
#endif
return GeoJSON { asMapboxGLFeature(value.value<QMapbox::Feature>()) };
} else if (value.type() != QVariant::ByteArray) {
error = { "JSON data must be in QByteArray" };
return {};
}
QByteArray data = value.toByteArray();
return parseGeoJSON(std::string(data.constData(), data.size()), error);
}
};
template <class T, class...Args>
optional<T> convert(const QVariant& value, Error& error, Args&&...args) {
return convert<T>(Convertible(value), error, std::forward<Args>(args)...);
}
} // namespace conversion
} // namespace style
} // namespace mbgl
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