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#ifndef MBGL_STYLE_STYLE_PARSER
#define MBGL_STYLE_STYLE_PARSER
#include <rapidjson/document.h>
#include <mbgl/style/style.hpp>
#include <mbgl/map/source.hpp>
#include <mbgl/style/filter_expression.hpp>
#include <mbgl/style/class_properties.hpp>
#include <mbgl/style/style_bucket.hpp>
#include <unordered_map>
#include <forward_list>
#include <tuple>
namespace mbgl {
enum class ClassID : uint32_t;
class StyleLayer;
class Source;
class StyleParser {
public:
using JSVal = const rapidjson::Value&;
enum Status : bool {
StyleParserFailure = 0,
StyleParserSuccess
};
template<typename T>
using Result = std::pair<Status, T>;
StyleParser(MapData& data);
void parse(JSVal document);
std::vector<std::unique_ptr<Source>>&& getSources() {
return std::move(sources);
}
std::vector<util::ptr<StyleLayer>> getLayers() {
return layers;
}
std::string getSprite() const {
return sprite;
}
std::string getGlyphURL() const {
return glyph_url;
}
private:
void parseSources(JSVal value);
void parseLayers(JSVal value);
void parseLayer(std::pair<JSVal, util::ptr<StyleLayer>> &pair);
void parsePaints(JSVal value, std::map<ClassID, ClassProperties> &paints);
void parsePaint(JSVal, ClassProperties &properties);
void parseReference(JSVal value, util::ptr<StyleLayer> &layer);
void parseBucket(JSVal value, util::ptr<StyleLayer> &layer);
void parseLayout(JSVal value, util::ptr<StyleBucket> &bucket);
void parseSprite(JSVal value);
void parseGlyphURL(JSVal value);
// Parses optional properties into a render bucket.
template<typename T>
Status parseRenderProperty(JSVal value, T &target, const char *name);
template <typename Parser, typename T>
Status parseRenderProperty(JSVal value, T &target, const char *name);
// Parses optional properties into style class properties.
template <typename T>
void parseVisibility(StyleBucket &bucket, JSVal value);
template <typename T>
Status parseOptionalProperty(const char *property_name, PropertyKey key, ClassProperties &klass, JSVal value);
template <typename T>
Status parseOptionalProperty(const char *property_name, PropertyKey key, ClassProperties &klass, JSVal value, const char *transition_name);
template <typename T>
Status setProperty(JSVal value, const char *property_name, PropertyKey key, ClassProperties &klass);
template <typename T>
Status setProperty(JSVal value, const char *property_name, PropertyKey key, ClassProperties &klass, JSVal transition);
template <typename T>
Result<T> parseProperty(JSVal value, const char *property_name);
template <typename T>
Result<T> parseProperty(JSVal value, const char *property_name, JSVal transition);
template <typename T>
Result<Function<T>> parseFunction(JSVal value, const char *);
template <typename T>
Result<PiecewiseConstantFunction<T>> parsePiecewiseConstantFunction(JSVal value, Duration duration);
template <typename T>
Result<std::vector<std::pair<float, T>>> parseStops(JSVal value, const char *property_name);
Result<std::vector<float>> parseFloatArray(JSVal value);
FilterExpression parseFilter(JSVal);
private:
std::uint8_t version;
std::vector<std::unique_ptr<Source>> sources;
std::vector<util::ptr<StyleLayer>> layers;
std::unordered_map<std::string, const Source*> sourcesMap;
std::unordered_map<std::string, std::pair<JSVal, util::ptr<StyleLayer>>> layersMap;
// Store a stack of layers we're parsing right now. This is to prevent reference cycles.
std::forward_list<StyleLayer *> stack;
// Base URL of the sprite image.
std::string sprite;
// URL template for glyph PBFs.
std::string glyph_url;
// Obtain default transition duration from map data.
MapData& data;
};
}
#endif
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