textline_core.hpp

#ifndef TERMOX_WIDGET_WIDGETS_DETAIL_TEXTLINE_CORE_HPP
#define TERMOX_WIDGET_WIDGETS_DETAIL_TEXTLINE_CORE_HPP
#include <termox/painter/glyph.hpp>
#include <termox/painter/glyph_string.hpp>
#include <termox/widget/align.hpp>
 
namespace ox::detail {
 
class Textline_core {
   public:
    Textline_core(ox::Glyph_string initial,
                  int display_length,
                  ox::Align alignment,
                  int cursor_index = 0);
 
   public:
    void set_text(ox::Glyph_string x);
 
    [[nodiscard]] auto text() const noexcept -> ox::Glyph_string const&;
 
    void clear();
 
    void set_display_length(int x);
 
    [[nodiscard]] auto display_length() const noexcept -> int;
 
    void set_alignment(ox::Align x);
 
    [[nodiscard]] auto alignment() const noexcept -> ox::Align;
 
    void increment_cursor();
 
    void decrement_cursor();
 
    void move_cursor_to_display(int x);
 
    void set_cursor_to_index(int i);
 
    void cursor_home();
 
    void cursor_end();
 
    void insert_at_cursor(ox::Glyph x);
 
    void erase_at_cursor();
 
    void erase_before_cursor();
 
    [[nodiscard]] auto cursor_position() const noexcept -> int;
 
 
    [[nodiscard]] auto display_substr() const -> ox::Glyph_string;
 
   private:
    ox::Glyph_string text_;
    int display_length_;
    ox::Align alignment_;
    int cursor_index_;
    int anchor_index_ = 0;  // The left most displayable index.
};
 
}  // namespace ox::detail
#endif  // TERMOX_WIDGET_WIDGETS_DETAIL_TEXTLINE_CORE_HPP