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#pragma once
#include <mbgl/text/glyph.hpp>
#include <mbgl/text/glyph_manager_observer.hpp>
#include <mbgl/text/glyph_range.hpp>
#include <mbgl/util/noncopyable.hpp>
#include <mbgl/util/font_stack.hpp>
#include <mbgl/util/immutable.hpp>
#include <string>
#include <unordered_map>
namespace mbgl {
class FileSource;
class AsyncRequest;
class Response;
class GlyphRequestor {
public:
virtual ~GlyphRequestor() = default;
virtual void onGlyphsAvailable(GlyphMap) = 0;
};
class GlyphManager : public util::noncopyable {
public:
GlyphManager(FileSource&);
~GlyphManager();
// Workers send a `getGlyphs` message to the main thread once they have determined
// their `GlyphDependencies`. If all glyphs are already locally available, GlyphManager
// will provide them to the requestor immediately. Otherwise, it makes a request on the
// FileSource is made for each range neeed, and notifies the observer when all are
// complete.
void getGlyphs(GlyphRequestor&, GlyphDependencies);
void removeRequestor(GlyphRequestor&);
void setURL(const std::string& url) {
glyphURL = url;
}
void setObserver(GlyphManagerObserver*);
private:
FileSource& fileSource;
std::string glyphURL;
struct GlyphRequest {
bool parsed = false;
std::unique_ptr<AsyncRequest> req;
std::unordered_map<GlyphRequestor*, std::shared_ptr<GlyphDependencies>> requestors;
};
struct Entry {
std::map<GlyphRange, GlyphRequest> ranges;
std::map<GlyphID, Immutable<Glyph>> glyphs;
};
std::unordered_map<FontStack, Entry, FontStackHash> entries;
GlyphRequest& requestRange(Entry&, const FontStack&, const GlyphRange&);
void processResponse(const Response&, const FontStack&, const GlyphRange&);
void notify(GlyphRequestor&, const GlyphDependencies&);
GlyphManagerObserver* observer = nullptr;
};
} // namespace mbgl
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