renderer.hpp

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#ifndef NEFORCE_TUI_RENDERER_HPP__
#define NEFORCE_TUI_RENDERER_HPP__

 
#include "NeForce/tui/dom/element.hpp"
#include "NeForce/tui/dom/style.hpp"
#include "NeForce/tui/screen.hpp"
NEFORCE_BEGIN_NAMESPACE__
NEFORCE_BEGIN_TUI__


class component_base;

struct scrollbar_hit {
    void* scroll_state; 
    int track_x;        
    int track_y;        
    int track_h;        
    int thumb_pos;      
    int thumb_size;     
    int content_h;      
    int sv_x;           
    int sv_w;           
    bool vertical;      
};

class NEFORCE_API renderer {
public:
    renderer(screen& target, const theme& t, int term_w, int term_h);

    void render(const element& tree, const vector<layout_rect>& layout, bool has_focus);

    void set_term_size(int w, int h) {
        term_w_ = w;
        term_h_ = h;
    }

    NEFORCE_NODISCARD const vector<scrollbar_hit>& scrollbar_hits() const noexcept { return scrollbar_hits_; }

    void render_text_block(int x, int y, int w, int h, const string& text, const tui::style& style, style::wrap_mode wm,
                           int* out_end_x = nullptr, int* out_end_y = nullptr);

    void apply_border(int x, int y, int w, int h, enum style::border border, const _NEFORCE color& c);

    void apply_style_to_cell(cell& cell, const style& style);

    void render_button(int x, int y, int w, int h, const string& label, const style& style, const tui::theme& theme,
                       style::variant variant);

    void render_checkbox(int x, int y, int w, int h, const string& label, bool checked, const style& style);

    void render_separator(int x, int y, int w);

    void apply_clear(int x, int y, int w, int h);

    void apply_text(int x, int y, const string& text, const style& style);

    void apply_text(int x, int y, const string& text, const style& style, int max_x);

    void clear_element_area(const element& el, const vector<layout_rect>& layout, int& idx);
 
private:
    struct clip_rect {
        int x, y, w, h;
    };
 
    screen& screen_;
    const theme& theme_;
    int term_w_;
    int term_h_;
    vector<clip_rect> clip_stack_;
    vector<scrollbar_hit> scrollbar_hits_;
    bool has_focus_ = false;
 
    void render_subtree(const element& el, const vector<layout_rect>& layout, int& idx);
};

NEFORCE_NODISCARD NEFORCE_API const element* find_element_at(const vector<layout_rect>& layout, const element& tree,
                                                             int mx, int my, int& idx);

NEFORCE_NODISCARD NEFORCE_API component_base* hit_test_at(const vector<layout_rect>& layout, const element& tree,
                                                          int mx, int my, int& idx, component_base* fallback);
 // TUI
 
NEFORCE_END_TUI__
NEFORCE_END_NAMESPACE__
#endif // NEFORCE_TUI_RENDERER_HPP__