control_textbox.hpp

//  SuperTux
//  Copyright (C) 2020 A. Semphris <semphris@protonmail.com>
//
//  This program is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program.  If not, see <http://www.gnu.org/licenses/>.

#ifndef HEADER_SUPERTUX_INTERFACE_CONTROL_TEXTBOX_HPP
#define HEADER_SUPERTUX_INTERFACE_CONTROL_TEXTBOX_HPP

#include <list>

#include "control/input_manager.hpp"
#include "interface/control.hpp"


class ControlTextbox : public InterfaceControl
{
public:
  ControlTextbox();

  virtual void draw(DrawingContext& context) override;
  virtual bool on_mouse_button_up(const SDL_MouseButtonEvent& button) override;
  virtual bool on_mouse_button_down(const SDL_MouseButtonEvent& button) override;
  virtual bool on_mouse_motion(const SDL_MouseMotionEvent& motion) override;
  virtual bool on_key_up(const SDL_KeyboardEvent& key) override;
  virtual bool on_key_down(const SDL_KeyboardEvent& key) override;
  virtual bool event(const SDL_Event& ev) override;

  virtual void update(float dt_sec) override;

  void bind_string(std::string* value) { m_string = value; }

  const std::string& get_string() const;

  int get_text_position(const Vector& pos) const;

  bool fits(const std::string& text) const;

  bool copy() const;

  bool paste();

  std::string get_selected_text() const;

  bool erase_selected_text();

  bool put_text(const std::string& text);

protected:
  virtual bool parse_value(bool call_on_change = true);

  virtual void revert_value();

protected:
  std::string get_contents() const;

  std::string get_first_chars(int amount) const;

  std::string get_contents_visible() const;

  std::string get_first_chars_visible(int amount) const;

public:
  bool (*m_validate_string)(ControlTextbox*, std::string);

protected:
  std::list<char> m_charlist;

  std::string* m_string;

  std::string m_internal_string_backup;

  float m_cursor_timer;
  int m_caret_pos;
  int m_secondary_caret_pos; 
  bool m_shift_pressed, m_ctrl_pressed;
  bool m_mouse_pressed;

  int m_current_offset;

protected:
  void delete_char_before_caret();

  std::string get_truncated_text(const std::string& text) const;

  void recenter_offset();

private:
  ControlTextbox(const ControlTextbox&) = delete;
  ControlTextbox& operator=(const ControlTextbox&) = delete;
};

#endif

/* EOF */