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resource.hpp
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resource.hpp
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#pragma once
#include <mbgl/storage/response.hpp>
#include <mbgl/util/bitmask_operations.hpp>
#include <mbgl/util/optional.hpp>
#include <mbgl/util/font_stack.hpp>
#include <mbgl/util/tileset.hpp>
#include <string>
namespace mbgl {
class Resource {
public:
enum Kind : uint8_t {
Unknown = 0,
Style,
Source,
Tile,
Glyphs,
SpriteImage,
SpriteJSON,
Image
};
enum class Priority : bool {
Regular,
Low
};
enum class Usage : bool {
Online,
Offline
};
enum class StoragePolicy : bool { Permanent, Volatile };
struct TileData {
std::string urlTemplate;
uint8_t pixelRatio;
int32_t x;
int32_t y;
int8_t z;
};
enum class LoadingMethod : uint8_t {
None = 0b00,
Cache = 0b01,
Network = 0b10,
CacheOnly = Cache,
NetworkOnly = Network,
All = Cache | Network,
};
Resource(Kind kind_,
std::string url_,
optional<TileData> tileData_ = {},
LoadingMethod loadingMethod_ = LoadingMethod::All)
: kind(kind_),
loadingMethod(loadingMethod_),
url(std::move(url_)),
tileData(std::move(tileData_)) {
}
void setPriority(Priority p) { priority = p; }
void setUsage(Usage u) { usage = u; }
bool hasLoadingMethod(LoadingMethod method) const;
static Resource style(const std::string& url);
static Resource source(const std::string& url);
static Resource tile(const std::string& urlTemplate,
float pixelRatio,
int32_t x,
int32_t y,
int8_t z,
Tileset::Scheme scheme,
LoadingMethod = LoadingMethod::All);
static Resource glyphs(const std::string& urlTemplate,
const FontStack& fontStack,
const std::pair<uint16_t, uint16_t>& glyphRange);
static Resource spriteImage(const std::string& base, float pixelRatio);
static Resource spriteJSON(const std::string& base, float pixelRatio);
static Resource image(const std::string& url);
Kind kind;
LoadingMethod loadingMethod;
Usage usage{ Usage::Online };
Priority priority{ Priority::Regular };
std::string url;
// Includes auxiliary data if this is a tile request.
optional<TileData> tileData;
optional<Timestamp> priorModified = {};
optional<Timestamp> priorExpires = {};
optional<std::string> priorEtag = {};
std::shared_ptr<const std::string> priorData;
Duration minimumUpdateInterval{Duration::zero()};
StoragePolicy storagePolicy{StoragePolicy::Permanent};
};
inline bool Resource::hasLoadingMethod(Resource::LoadingMethod method) const {
return (loadingMethod & method);
}
} // namespace mbgl