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#ifndef LLMR_STYLE_STYLE_PARSER
#define LLMR_STYLE_STYLE_PARSER
#include <rapidjson/document.h>
#include <llmr/style/style.hpp>
#include <llmr/map/source.hpp>
#include <llmr/style/filter_expression.hpp>
#include <llmr/style/class_properties.hpp>
#include <llmr/style/rasterize_properties.hpp>
#include <llmr/style/style_bucket.hpp>
#include <unordered_map>
#include <forward_list>
namespace llmr {
enum class ClassID : uint32_t;
class StyleLayer;
class StyleLayerGroup;
class StyleParser {
public:
using JSVal = const rapidjson::Value&;
void parse(JSVal document);
std::shared_ptr<StyleLayerGroup> getLayers() {
return root;
}
private:
void parseConstants(JSVal value);
JSVal replaceConstant(JSVal value);
void parseSources(JSVal value);
std::unique_ptr<StyleLayerGroup> createLayers(JSVal value);
std::shared_ptr<StyleLayer> createLayer(JSVal value);
void parseLayers();
void parseLayer(std::pair<JSVal, std::shared_ptr<StyleLayer>> &pair);
void parseStyles(JSVal value, std::map<ClassID, ClassProperties> &styles);
void parseStyle(JSVal, ClassProperties &properties);
std::unique_ptr<const RasterizeProperties> parseRasterize(JSVal value);
void parseReference(JSVal value, std::shared_ptr<StyleLayer> &layer);
void parseBucket(JSVal value, std::shared_ptr<StyleLayer> &layer);
void parseRender(JSVal value, std::shared_ptr<StyleLayer> &layer);
// Parses optional properties into a render bucket.
template<typename T>
bool parseRenderProperty(JSVal value, T &target, const char *name);
template <typename T, typename Parser>
bool parseRenderProperty(JSVal value, T &target, const char *name, Parser &parser);
// Parses optional properties into style class properties.
template <typename T>
bool parseStyleProperty(const char *property_name, PropertyKey key, ClassProperties &klass, JSVal value);
template <typename T>
bool parseStyleProperty(const char *property_name, const std::vector<PropertyKey> &keys, ClassProperties &klass, JSVal value);
FilterExpression parseFilter(JSVal, FilterExpression::Operator op);
FilterExpression parseFilter(JSVal);
Value parseValue(JSVal value);
std::forward_list<Value> parseValues(JSVal values);
private:
std::unordered_map<std::string, const rapidjson::Value *> constants;
std::unordered_map<std::string, const std::shared_ptr<Source>> sources;
// This stores the root layer.
std::shared_ptr<StyleLayerGroup> root;
// This maps ids to Layer objects, with all items being at the root level.
std::unordered_map<std::string, std::pair<JSVal, std::shared_ptr<StyleLayer>>> layers;
// Layer IDs that we have encountered previously while parsing this stylesheet.
std::set<std::string> existing_layer_ids;
// Store a stack of layers we're parsing right now. This is to prevent reference cycles.
std::forward_list<StyleLayer *> stack;
};
}
#endif
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