OSDText.hh

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#ifndef OSDTEXT_HH
#define OSDTEXT_HH
 
#include "OSDImageBasedWidget.hh"
#include "TTFFont.hh"
#include "stl.hh"
#include <array>
#include <memory>
 
namespace openmsx {
 
class OSDText final : public OSDImageBasedWidget
{
protected:
        static constexpr auto textProperties = [] {
                using namespace std::literals;
                return concatArray(
                        imageBasedProperties,
                        std::array{
                                "-text"sv, "-font"sv, "-size"sv,
                                "-wrap"sv, "-wrapw"sv, "-wraprelw"sv,
                        });
        }();
 
public:
        OSDText(Display& display, const TclObject& name);
 
        [[nodiscard]] std::span<const std::string_view> getProperties() const override {
                return textProperties;
        }
        void setProperty(Interpreter& interp,
                         std::string_view name, const TclObject& value) override;
        void getProperty(std::string_view name, TclObject& result) const override;
        [[nodiscard]] std::string_view getType() const override;
 
private:
        void invalidateLocal() override;
        [[nodiscard]] gl::vec2 getSize(const OutputSurface& output) const override;
        [[nodiscard]] uint8_t getFadedAlpha() const override;
        [[nodiscard]] std::unique_ptr<BaseImage> createSDL(OutputSurface& output) override;
        [[nodiscard]] std::unique_ptr<BaseImage> createGL (OutputSurface& output) override;
        template<typename IMAGE> [[nodiscard]] std::unique_ptr<BaseImage> create(
                OutputSurface& output);
 
        template<typename FindSplitPointFunc, typename CantSplitFunc>
        [[nodiscard]] size_t split(const std::string& line, unsigned maxWidth,
                FindSplitPointFunc findSplitPoint, CantSplitFunc cantSplit,
                bool removeTrailingSpaces) const;
        [[nodiscard]] size_t splitAtChar(const std::string& line, unsigned maxWidth) const;
        [[nodiscard]] size_t splitAtWord(const std::string& line, unsigned maxWidth) const;
        [[nodiscard]] std::string getCharWrappedText(const std::string& txt, unsigned maxWidth) const;
        [[nodiscard]] std::string getWordWrappedText(const std::string& txt, unsigned maxWidth) const;
 
private:
        enum WrapMode { NONE, WORD, CHAR };
 
        std::string text;
        std::string fontFile;
        TTFFont font;
        int size = 12;
        WrapMode wrapMode = NONE;
        float wrapw = 0.0f, wraprelw = 1.0f;
 
        friend struct SplitAtChar;
};
 
} // namespace openmsx
 
#endif