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#pragma once
#include <mbgl/util/noncopyable.hpp>
#include <mbgl/util/chrono.hpp>
#include <mbgl/util/optional.hpp>
#include <mbgl/util/feature.hpp>
#include <mbgl/util/tile_coordinate.hpp>
#include <mbgl/tile/tile_id.hpp>
#include <mbgl/renderer/bucket.hpp>
#include <mbgl/tile/geometry_tile_data.hpp>
#include <mbgl/storage/resource.hpp>
#include <string>
#include <memory>
#include <functional>
#include <unordered_map>
namespace mbgl {
class DebugBucket;
class TransformState;
class TileObserver;
class PlacementConfig;
class QueryOptions;
namespace style {
class Layer;
} // namespace style
class Tile : private util::noncopyable {
public:
Tile(OverscaledTileID);
virtual ~Tile();
void setObserver(TileObserver* observer);
// Tiles can have two states: optional or required.
// - optional means that only low-cost actions should be taken to obtain the data
// (e.g. load from cache, but accept stale data)
// - required means that every effort should be taken to obtain the data (e.g. load
// from internet and keep the data fresh if it expires)
using Necessity = Resource::Necessity;
virtual void setNecessity(Necessity) = 0;
// Mark this tile as no longer needed and cancel any pending work.
virtual void cancel() = 0;
virtual Bucket* getBucket(const style::Layer&) = 0;
virtual void setPlacementConfig(const PlacementConfig&) {}
virtual void symbolDependenciesChanged() {};
virtual void redoLayout() {}
virtual void queryRenderedFeatures(
std::unordered_map<std::string, std::vector<Feature>>& result,
const GeometryCoordinates& queryGeometry,
const TransformState&,
const QueryOptions& options);
void setTriedOptional();
// Returns true when the tile source has received a first response, regardless of whether a load
// error occurred or actual data was loaded.
bool hasTriedOptional() const {
return triedOptional;
}
// Tile data considered "Renderable" can be used for rendering. Data in
// partial state is still waiting for network resources but can also
// be rendered, although layers will be missing.
bool isRenderable() const {
return availableData != DataAvailability::None;
}
bool isComplete() const {
return availableData == DataAvailability::All;
}
void dumpDebugLogs() const;
const OverscaledTileID id;
optional<Timestamp> modified;
optional<Timestamp> expires;
// Contains the tile ID string for painting debug information.
std::unique_ptr<DebugBucket> debugBucket;
protected:
bool triedOptional = false;
enum class DataAvailability : uint8_t {
// Still waiting for data to load or parse.
None,
// Tile is partially parsed, some buckets are still waiting for dependencies
// to arrive, but it is good for rendering. Partial tiles can also be re-parsed,
// but might remain in the same state if dependencies are still missing.
Some,
// Tile is fully parsed, and all buckets are available if they exist.
All,
};
DataAvailability availableData = DataAvailability::None;
TileObserver* observer = nullptr;
};
} // namespace mbgl
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