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#include <mbgl/style/layer.hpp>
#include <mbgl/style/layer_impl.hpp>
#include <mbgl/style/layer_observer.hpp>
#include <mbgl/style/conversion/constant.hpp>
#include <mbgl/style/conversion/filter.hpp>
#include <mbgl/style/conversion_impl.hpp>
#include <mbgl/style/layers/symbol_layer.hpp>
#include <mbgl/style/layers/background_layer.hpp>
#include <mbgl/style/layers/circle_layer.hpp>
#include <mbgl/style/layers/fill_extrusion_layer.hpp>
#include <mbgl/style/layers/fill_layer.hpp>
#include <mbgl/style/layers/heatmap_layer.hpp>
#include <mbgl/style/layers/hillshade_layer.hpp>
#include <mbgl/style/layers/line_layer.hpp>
#include <mbgl/style/layers/raster_layer.hpp>
#include <mbgl/style/layers/symbol_layer.hpp>
namespace mbgl {
namespace style {
static LayerObserver nullObserver;
Layer::Layer(Immutable<Impl> impl)
: baseImpl(std::move(impl)),
observer(&nullObserver) {
}
Layer::~Layer() = default;
LayerType Layer::getType() const {
return baseImpl->type;
}
std::string Layer::getID() const {
return baseImpl->id;
}
std::string Layer::getSourceID() const {
return baseImpl->source;
}
std::string Layer::getSourceLayer() const {
return baseImpl->sourceLayer;
}
void Layer::setSourceLayer(const std::string& sourceLayer) {
auto impl_ = mutableBaseImpl();
impl_->sourceLayer = sourceLayer;
baseImpl = std::move(impl_);
}
const Filter& Layer::getFilter() const {
return baseImpl->filter;
}
void Layer::setFilter(const Filter& filter) {
auto impl_ = mutableBaseImpl();
impl_->filter = filter;
baseImpl = std::move(impl_);
observer->onLayerChanged(*this);
}
VisibilityType Layer::getVisibility() const {
return baseImpl->visibility;
}
void Layer::setVisibility(VisibilityType value) {
if (value == getVisibility())
return;
auto impl_ = mutableBaseImpl();
impl_->visibility = value;
baseImpl = std::move(impl_);
observer->onLayerChanged(*this);
}
float Layer::getMinZoom() const {
return baseImpl->minZoom;
}
float Layer::getMaxZoom() const {
return baseImpl->maxZoom;
}
void Layer::setMinZoom(float minZoom) {
auto impl_ = mutableBaseImpl();
impl_->minZoom = minZoom;
baseImpl = std::move(impl_);
observer->onLayerChanged(*this);
}
void Layer::setMaxZoom(float maxZoom) {
auto impl_ = mutableBaseImpl();
impl_->maxZoom = maxZoom;
baseImpl = std::move(impl_);
observer->onLayerChanged(*this);
}
void Layer::setObserver(LayerObserver* observer_) {
observer = observer_ ? observer_ : &nullObserver;
}
optional<conversion::Error> Layer::setVisibility(const conversion::Convertible& value) {
using namespace conversion;
if (isUndefined(value)) {
setVisibility(VisibilityType::Visible);
return nullopt;
}
Error error;
optional<VisibilityType> visibility = convert<VisibilityType>(value, error);
if (!visibility) {
return error;
}
setVisibility(*visibility);
return nullopt;
}
optional<std::string> LayerFactory::getSource(const conversion::Convertible& value) const {
auto sourceValue = objectMember(value, "source");
if (!sourceValue) {
return nullopt;
}
optional<std::string> source = toString(*sourceValue);
if (!source) {
return nullopt;
}
return source;
}
bool LayerFactory::initSourceLayerAndFilter(Layer* layer, const conversion::Convertible& value) const {
auto sourceLayerValue = objectMember(value, "source-layer");
if (sourceLayerValue) {
optional<std::string> sourceLayer = toString(*sourceLayerValue);
if (!sourceLayer) {
return false;
}
layer->setSourceLayer(*sourceLayer);
}
auto filterValue = objectMember(value, "filter");
if (filterValue) {
conversion::Error error;
optional<Filter> filter = conversion::convert<Filter>(*filterValue, error);
if (!filter) {
return false;
}
layer->setFilter(*filter);
}
return true;
}
// TODO: Move the LayerManager implementation to the dedicated .cpp file per platform.
class LayerManagerImpl : public LayerManager {
public:
void addLayerFactory(LayerFactory* factory) {
factories.emplace(std::make_pair(factory->type(), std::unique_ptr<LayerFactory>(factory)));
}
private:
// LayerManager overrides.
std::unique_ptr<Layer> createLayer(const std::string& type, const std::string& id, const conversion::Convertible& value, conversion::Error& error) final;
std::unordered_map<std::string, std::unique_ptr<LayerFactory>> factories;
};
std::unique_ptr<Layer> LayerManagerImpl::createLayer(const std::string& type, const std::string& id, const conversion::Convertible& value, conversion::Error& error) {
auto search = factories.find(type);
if (search != factories.end()) {
if (auto layer = search->second->createLayer(id, value)) {
return layer;
}
error.message = "Error parsing a layer of type: " + type;
} else {
error.message = "Unsupported layer type: " + type;
}
return nullptr;
}
// static
LayerManager* LayerManager::get() {
static LayerManager* instance = nullptr;
if (instance == nullptr) {
static LayerManagerImpl impl;
impl.addLayerFactory(new FillLayerFactory);
impl.addLayerFactory(new LineLayerFactory);
impl.addLayerFactory(new CircleLayerFactory);
impl.addLayerFactory(new SymbolLayerFactory);
impl.addLayerFactory(new RasterLayerFactory);
impl.addLayerFactory(new BackgroundLayerFactory);
impl.addLayerFactory(new HillshadeLayerFactory);
impl.addLayerFactory(new FillExtrusionLayerFactory);
impl.addLayerFactory(new HeatmapLayerFactory);
instance = &impl;
}
return instance;
}
} // namespace style
} // namespace mbgl
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