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ImHex/lib/libimhex/include/hex/api/theme_manager.hpp

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#pragma once
#include <hex.hpp>
#include <hex/helpers/fs.hpp>
#include <string>
#include <variant>
#include <nlohmann/json_fwd.hpp>
#include <imgui.h>
namespace hex {
/**
* @brief The Theme Manager takes care of loading and applying themes
*/
class ThemeManager {
public:
constexpr static auto NativeTheme = "Native";
using ColorMap = std::map<std::string, u32>;
struct Style {
std::variant<ImVec2*, float*> value;
float min;
float max;
bool needsScaling;
};
using StyleMap = std::map<std::string, Style>;
/**
* @brief Changes the current theme to the one with the given name
* @param name Name of the theme to change to
*/
static void changeTheme(std::string name);
/**
* @brief Adds a theme from json data
* @param content JSON data of the theme
*/
static void addTheme(const std::string &content);
/**
* @brief Adds a theme handler to handle color values loaded from a theme file
* @param name Name of the handler
* @param colorMap Map of color names to their respective constants
* @param getFunction Function to get the color value of a constant
* @param setFunction Function to set the color value of a constant
*/
static void addThemeHandler(const std::string &name, const ColorMap &colorMap, const std::function<ImColor(u32)> &getFunction, const std::function<void(u32, ImColor)> &setFunction);
/**
* @brief Adds a style handler to handle style values loaded from a theme file
* @param name Name of the handler
* @param styleMap Map of style names to their respective constants
*/
static void addStyleHandler(const std::string &name, const StyleMap &styleMap);
static void reapplyCurrentTheme();
static std::vector<std::string> getThemeNames();
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static const std::string &getImageTheme();
static std::optional<ImColor> parseColorString(const std::string &colorString);
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static nlohmann::json exportCurrentTheme(const std::string &name);
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static void reset();
public:
struct ThemeHandler {
ColorMap colorMap;
std::function<ImColor(u32)> getFunction;
std::function<void(u32, ImColor)> setFunction;
};
struct StyleHandler {
StyleMap styleMap;
};
static const std::map<std::string, ThemeHandler>& getThemeHandlers();
static const std::map<std::string, StyleHandler>& getStyleHandlers();
private:
ThemeManager() = default;
};
}