Theme.h

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#pragma once
#include <string>
#include <unordered_map>
#include <memory>
#include <vector>
#include <imgui.h>
 
namespace Editor::UI
{
    struct ThemeColors
    {
        // Window colors
        ImVec4 WindowBg = ImVec4(0.06f, 0.06f, 0.06f, 1.0f);
        ImVec4 ChildBg = ImVec4(0.00f, 0.00f, 0.00f, 0.0f);
        ImVec4 PopupBg = ImVec4(0.08f, 0.08f, 0.08f, 0.94f);
 
        // Border colors
        ImVec4 Border = ImVec4(0.43f, 0.43f, 0.50f, 0.50f);
        ImVec4 BorderShadow = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
 
        // Frame colors
        ImVec4 FrameBg = ImVec4(0.16f, 0.29f, 0.48f, 0.54f);
        ImVec4 FrameBgHovered = ImVec4(0.26f, 0.59f, 0.98f, 0.40f);
        ImVec4 FrameBgActive = ImVec4(0.26f, 0.59f, 0.98f, 0.67f);
 
        // Title colors
        ImVec4 TitleBg = ImVec4(0.04f, 0.04f, 0.04f, 1.0f);
        ImVec4 TitleBgActive = ImVec4(0.16f, 0.29f, 0.48f, 1.0f);
        ImVec4 TitleBgCollapsed = ImVec4(0.00f, 0.00f, 0.00f, 0.51f);
 
        // Menu colors
        ImVec4 MenuBarBg = ImVec4(0.14f, 0.14f, 0.14f, 1.0f);
 
        // Scrollbar colors
        ImVec4 ScrollbarBg = ImVec4(0.02f, 0.02f, 0.02f, 0.53f);
        ImVec4 ScrollbarGrab = ImVec4(0.31f, 0.31f, 0.31f, 1.0f);
        ImVec4 ScrollbarGrabHovered = ImVec4(0.41f, 0.41f, 0.41f, 1.0f);
        ImVec4 ScrollbarGrabActive = ImVec4(0.51f, 0.51f, 0.51f, 1.0f);
 
        // Button colors
        ImVec4 Button = ImVec4(0.26f, 0.59f, 0.98f, 0.40f);
        ImVec4 ButtonHovered = ImVec4(0.26f, 0.59f, 0.98f, 1.0f);
        ImVec4 ButtonActive = ImVec4(0.06f, 0.53f, 0.98f, 1.0f);
 
        // Header colors
        ImVec4 Header = ImVec4(0.26f, 0.59f, 0.98f, 0.31f);
        ImVec4 HeaderHovered = ImVec4(0.26f, 0.59f, 0.98f, 0.80f);
        ImVec4 HeaderActive = ImVec4(0.26f, 0.59f, 0.98f, 1.0f);
 
        // Separator colors
        ImVec4 Separator = ImVec4(0.43f, 0.43f, 0.50f, 0.50f);
        ImVec4 SeparatorHovered = ImVec4(0.10f, 0.40f, 0.75f, 0.78f);
        ImVec4 SeparatorActive = ImVec4(0.10f, 0.40f, 0.75f, 1.0f);
 
        // Resize grip colors
        ImVec4 ResizeGrip = ImVec4(0.26f, 0.59f, 0.98f, 0.20f);
        ImVec4 ResizeGripHovered = ImVec4(0.26f, 0.59f, 0.98f, 0.67f);
        ImVec4 ResizeGripActive = ImVec4(0.26f, 0.59f, 0.98f, 0.95f);
 
        // Tab colors
        ImVec4 Tab = ImVec4(0.18f, 0.35f, 0.58f, 0.86f);
        ImVec4 TabHovered = ImVec4(0.26f, 0.59f, 0.98f, 0.80f);
        ImVec4 TabActive = ImVec4(0.20f, 0.41f, 0.68f, 1.0f);
        ImVec4 TabUnfocused = ImVec4(0.07f, 0.10f, 0.15f, 0.97f);
        ImVec4 TabUnfocusedActive = ImVec4(0.14f, 0.26f, 0.42f, 1.0f);
 
        // Docking colors
        ImVec4 DockingPreview = ImVec4(0.26f, 0.59f, 0.98f, 0.70f);
        ImVec4 DockingEmptyBg = ImVec4(0.20f, 0.20f, 0.20f, 1.00f);
 
        // Plot colors
        ImVec4 PlotLines = ImVec4(0.61f, 0.61f, 0.61f, 1.0f);
        ImVec4 PlotLinesHovered = ImVec4(1.00f, 0.43f, 0.35f, 1.0f);
        ImVec4 PlotHistogram = ImVec4(0.90f, 0.70f, 0.00f, 1.0f);
        ImVec4 PlotHistogramHovered = ImVec4(1.00f, 0.60f, 0.00f, 1.0f);
 
        // Table colors
        ImVec4 TableHeaderBg = ImVec4(0.19f, 0.19f, 0.20f, 1.0f);
        ImVec4 TableBorderStrong = ImVec4(0.31f, 0.31f, 0.35f, 1.0f);
        ImVec4 TableBorderLight = ImVec4(0.23f, 0.23f, 0.25f, 1.0f);
        ImVec4 TableRowBg = ImVec4(0.00f, 0.00f, 0.00f, 0.0f);
        ImVec4 TableRowBgAlt = ImVec4(1.00f, 1.00f, 1.00f, 0.06f);
 
        // Text colors
        ImVec4 Text = ImVec4(1.00f, 1.00f, 1.00f, 1.0f);
        ImVec4 TextDisabled = ImVec4(0.50f, 0.50f, 0.50f, 1.0f);
        ImVec4 TextSelectedBg = ImVec4(0.26f, 0.59f, 0.98f, 0.35f);
 
        // Drag drop colors
        ImVec4 DragDropTarget = ImVec4(1.00f, 1.00f, 0.00f, 0.90f);
 
        // Navigation colors
        ImVec4 NavHighlight = ImVec4(0.26f, 0.59f, 0.98f, 1.0f);
        ImVec4 NavWindowingHighlight = ImVec4(1.00f, 1.00f, 1.00f, 0.70f);
        ImVec4 NavWindowingDimBg = ImVec4(0.80f, 0.80f, 0.80f, 0.20f);
 
        // Modal colors
        ImVec4 ModalWindowDimBg = ImVec4(0.80f, 0.80f, 0.80f, 0.35f);
 
        // Check mark
        ImVec4 CheckMark = ImVec4(0.26f, 0.59f, 0.98f, 1.0f);
 
        // Slider colors
        ImVec4 SliderGrab = ImVec4(0.24f, 0.52f, 0.88f, 1.0f);
        ImVec4 SliderGrabActive = ImVec4(0.26f, 0.59f, 0.98f, 1.0f);
    };
 
    struct ThemeStyle
    {
        float Alpha = 1.0f;
        float DisabledAlpha = 0.60f;
        ImVec2 WindowPadding = ImVec2(8.0f, 8.0f);
        float WindowRounding = 0.0f;
        float WindowBorderSize = 1.0f;
        ImVec2 WindowMinSize = ImVec2(32.0f, 32.0f);
        ImVec2 WindowTitleAlign = ImVec2(0.0f, 0.5f);
        ImGuiDir WindowMenuButtonPosition = ImGuiDir_Left;
        float ChildRounding = 0.0f;
        float ChildBorderSize = 1.0f;
        float PopupRounding = 0.0f;
        float PopupBorderSize = 1.0f;
        ImVec2 FramePadding = ImVec2(4.0f, 3.0f);
        float FrameRounding = 0.0f;
        float FrameBorderSize = 0.0f;
        ImVec2 ItemSpacing = ImVec2(8.0f, 4.0f);
        ImVec2 ItemInnerSpacing = ImVec2(4.0f, 4.0f);
        ImVec2 CellPadding = ImVec2(4.0f, 2.0f);
        ImVec2 TouchExtraPadding = ImVec2(0.0f, 0.0f);
        float IndentSpacing = 21.0f;
        float ColumnsMinSpacing = 6.0f;
        float ScrollbarSize = 14.0f;
        float ScrollbarRounding = 9.0f;
        float GrabMinSize = 12.0f;
        float GrabRounding = 0.0f;
        float LogSliderDeadzone = 4.0f;
        float TabRounding = 4.0f;
        float TabBorderSize = 0.0f;
        float TabMinWidthForCloseButton = 0.0f;
        ImGuiDir ColorButtonPosition = ImGuiDir_Right;
        ImVec2 ButtonTextAlign = ImVec2(0.5f, 0.5f);
        ImVec2 SelectableTextAlign = ImVec2(0.0f, 0.0f);
        float SeparatorTextBorderSize = 3.0f;
        ImVec2 SeparatorTextAlign = ImVec2(0.0f, 0.5f);
        ImVec2 SeparatorTextPadding = ImVec2(20.0f, 3.0f);
        ImVec2 DisplayWindowPadding = ImVec2(19.0f, 19.0f);
        ImVec2 DisplaySafeAreaPadding = ImVec2(3.0f, 3.0f);
        float MouseCursorScale = 1.0f;
        bool AntiAliasedLines = true;
        bool AntiAliasedLinesUseTex = true;
        bool AntiAliasedFill = true;
        float CurveTessellationTol = 1.25f;
        float CircleTessellationMaxError = 0.30f;
    };
 
    class Theme
    {
    public:
        std::string name;
        ThemeColors colors;
        ThemeStyle style;
 
        Theme(const std::string &themeName) : name(themeName) {}
 
        void Apply() const;
 
        std::unique_ptr<Theme> Clone() const;
    };
 
    class ThemeManager
    {
    public:
        static ThemeManager &GetInstance();
 
        void Initialize();
 
        void RegisterTheme(std::unique_ptr<Theme> theme);
 
        bool SetActiveTheme(const std::string &themeName);
 
        Theme *GetActiveTheme() const;
 
        std::vector<std::string> GetThemeNames() const;
 
        Theme *GetTheme(const std::string &themeName) const;
 
        void ApplyActiveTheme() const;
 
        void DrawThemeSelector();
 
    private:
        std::unordered_map<std::string, std::unique_ptr<Theme>> m_themes;
        std::string m_activeThemeName = "Dark";
        static std::unique_ptr<ThemeManager> s_instance;
 
        ThemeManager() = default;
 
        std::unique_ptr<Theme> CreateDarkTheme();
 
        std::unique_ptr<Theme> CreateLightTheme();
 
        std::unique_ptr<Theme> CreateBlueTheme();
 
        std::unique_ptr<Theme> CreateHighContrastTheme();
    };
}