33818233cf
The `LayerTypeInfo` contains static meta data about certain layer type. Each layer module should have a single immutable `LayerTypeInfo` instance for the represented layer type. Both `LayerImpl` and `LayerFactory` from the module always refer to the same `LayerTypeInfo` instance, so address of this instance can be used as a layer module Id during the process life time.
79 lines
2.8 KiB
C++
79 lines
2.8 KiB
C++
#include <mbgl/style/layer.hpp>
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#include <mbgl/style/layers/symbol_layer.hpp>
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#include <mbgl/style/layers/background_layer.hpp>
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#include <mbgl/style/layers/circle_layer.hpp>
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#include <mbgl/style/layers/custom_layer.hpp>
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#include <mbgl/style/layers/fill_extrusion_layer.hpp>
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#include <mbgl/style/layers/fill_layer.hpp>
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#include <mbgl/style/layers/heatmap_layer.hpp>
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#include <mbgl/style/layers/hillshade_layer.hpp>
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#include <mbgl/style/layers/line_layer.hpp>
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#include <mbgl/style/layers/raster_layer.hpp>
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#include <mbgl/style/layers/symbol_layer.hpp>
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#include <map>
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#include <memory>
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#include <vector>
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namespace mbgl {
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namespace style {
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class LayerManagerBase : public LayerManager {
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public:
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LayerManagerBase();
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private:
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void addLayerType(std::unique_ptr<LayerFactory>);
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// LayerManager overrides.
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std::unique_ptr<Layer> createLayer(const std::string& type, const std::string& id, const conversion::Convertible& value, conversion::Error& error) noexcept final;
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std::vector<std::unique_ptr<LayerFactory>> factories;
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std::map<std::string, LayerFactory*> typeToFactory;
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};
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LayerManagerBase::LayerManagerBase() {
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addLayerType(std::make_unique<FillLayerFactory>());
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addLayerType(std::make_unique<LineLayerFactory>());
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addLayerType(std::make_unique<CircleLayerFactory>());
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addLayerType(std::make_unique<SymbolLayerFactory>());
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addLayerType(std::make_unique<RasterLayerFactory>());
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addLayerType(std::make_unique<BackgroundLayerFactory>());
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addLayerType(std::make_unique<HillshadeLayerFactory>());
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addLayerType(std::make_unique<FillExtrusionLayerFactory>());
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addLayerType(std::make_unique<HeatmapLayerFactory>());
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addLayerType(std::make_unique<CustomLayerFactory>());
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}
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void LayerManagerBase::addLayerType(std::unique_ptr<LayerFactory> factory) {
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std::string type{factory->getTypeInfo()->type};
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if (!type.empty()) {
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typeToFactory.emplace(std::make_pair(std::move(type), factory.get()));
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}
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factories.emplace_back(std::move(factory));
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}
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std::unique_ptr<Layer> LayerManagerBase::createLayer(const std::string& type,
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const std::string& id,
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const conversion::Convertible& value,
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conversion::Error& error) noexcept {
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auto search = typeToFactory.find(type);
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if (search != typeToFactory.end()) {
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auto layer = search->second->createLayer(id, value);
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if (!layer) {
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error.message = "Error parsing a layer of type: " + type;
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}
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return layer;
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}
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error.message = "Unsupported layer type: " + type;
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return nullptr;
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}
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// static
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LayerManager* LayerManager::get() noexcept {
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static LayerManagerBase impl;
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return &impl;
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}
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} // namespace style
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} // namespace mbgl
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