screen.hpp

#pragma once
#include "widget.hpp"
#include "color.hpp"
#include "coord.hpp"
#include "layout.hpp"
#include <string>

class BaseTextBuffer;
class StatusBar;

class Screen: public Widget
{
public:
  Screen(Widget * = nullptr);
  ~Screen();
  struct Char
  {
    Char(wchar_t = L'\0', Color fg = Black, Color bg = White);
    bool operator!=(const Char &) const;
    wchar_t ch;
    Color fg;
    Color bg;
  };
  int widthCh() const;
  int heightCh() const;
  Char &ch(int x, int y);
  const Char &ch(int x, int y) const;
  Coord cursor() const;
  void setCursor(Coord);
  void setCursor(int x, int y);
  BaseTextBuffer *textBuffer() const;
  void setTextBuffer(BaseTextBuffer *);
  int hScroll() const;
  void setHScroll(int);
  int vScroll() const;
  void setVScroll(int);
  Coord startSelection() const;
  void setStartSelection(Coord);
  Coord endSelection() const;
  void setEndSelection(Coord);
  bool isSelected(Coord) const;
  StatusBar *statusBar() const;
  void setStatusBar(StatusBar *);

  void moveCursorLeft();
  void moveCursorRight();
  void moveCursorUp();
  void moveCursorDown();
  void moveCursorHome();
  void moveCursorEnd();
  void moveCursorPageUp();
  void moveCursorPageDown();
  int copy();
  void paste();
  void cut();
  void selectAll();
  void startIsearch();
  void escStatusBar();
protected:
  int glyphHeight() const;
  int glyphWidth() const;
private:
  int glyphWidth_;
  int glyphHeight_;
  Coord cursor_;
  Coord startSelection_;
  Coord endSelection_;
  int hScroll_;
  int vScroll_;
  BaseTextBuffer *textBuffer_;
  StatusBar *statusBar_;
  int prevX_;
  int prevY_;
  std::vector<std::vector<Char> > ch_;
  std::vector<std::vector<Char> > prevCh_;
  void select(void (Screen::*moveCursor)());
  void moveCursor(void (Screen::*moveCursor)());
  std::wstring getSelected() const;
  void render();
  int deleteSelected();
protected:
  virtual void resizeEvent(ResizeEvent &);
  virtual void paintEvent(PaintEvent &);
  virtual bool keyPressEvent(KeyEvent &);
  virtual bool textInputEvent(TextInputEvent &);
};