// -*- mode:C++ ; compile-command: "g++ -I.. -g -c Input.cc" -*-
#ifndef _INPUT_H
#define _INPUT_H
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "vector.h"
#include <string>
#ifndef IN_GIAC
#include <giac/first.h>
#include <giac/gen.h>
#include <giac/identificateur.h>
#else
#include "first.h"
#include "gen.h"
#include "identificateur.h"
#endif
#ifdef HAVE_LIBFLTK
#include <FL/Fl_Window.H>
#include <FL/Fl_Menu.H>
#include <FL/Fl_Group.H>
#include <FL/Fl_Scrollbar.H>
#include <FL/Fl_Multiline_Input.H>
#include <FL/Fl_Multiline_Output.H>
#include "FL/Fl_Help_Dialog.H"
#endif
#ifdef HAVE_LC_MESSAGES
#include <locale.h>
#endif
#include <giacintl.h>

#ifndef NO_NAMESPACE_XCAS
namespace xcas {
#endif // ndef NO_NAMESPACE_XCAS

  // If use_external_browser is true you can change the browser used
  // by setting the BROWSER env variable, e.g. export BROWSER=...
  extern bool use_external_browser; 
  // alert if the command is not successfull
  void system_browser(const std::string & s);

  // return the last keyword of s
  std::string motclef(const std::string & s);

#ifdef HAVE_LIBFLTK

  extern Fl_Help_Dialog * Xcas_help_window;
  extern Fl_Window * handle_tab_w ;

  // Default vector of completions inside the Multiline_Input_tab
  // Use the function read_aide to load completions from a help file
  bool read_aide(const std::string & helpfilename,int language);
  // Help window for the application, return 0 if cancel, 1 if add () or 2 if no ()
  int handle_tab(const std::string & s,const std::vector<std::string> & v,int dx,int dy,int & remove,std::string & ans,bool allow_immediate_out=true);

  int height(const char *,int);

  class Flv_Table_Gen ;

  void Multiline_default_callback(Fl_Widget * w,void *);

  extern Fl_Widget * Xcas_input_focus;

  class Multiline_Input_tab:public Fl_Multiline_Input {
    static int count;
    static std::vector<std::string> history;
    bool handling;
    int in_handle(int);
  public:
    std::vector<std::string> * completion_tab ;
    virtual FL_EXPORT int handle(int);    
    // virtual FL_EXPORT void draw();
    // if selected is true, it will select the insertion
    void insert_replace(const std::string & chaine,bool selected);
    Flv_Table_Gen * tableur;
    giac::gen _g; // If the widget is not changed() then parse will use g
    giac::gen g();
    void set_g(const giac::gen & g);
    void match(); // Show matching parenthesis, [ , etc. region 
    Multiline_Input_tab(int x,int y,int w,int h,const char * l= 0);
    virtual ~Multiline_Input_tab() { if (Xcas_input_focus==this) Xcas_input_focus=0;}
    void resize_nl(); // resize input and parents according to number of lines
    bool need_nl(); 
    // return true if current line up to position is too large to be displayed
    // with the current widget width (and font)
  };

  void increase_size(Fl_Widget * wid,int L); // change parents size in a History_Pack

  class Gen_Output:public Fl_Multiline_Output {
  public:
    giac::gen g;
    void value(const giac::gen & _g);
    void value(const char * ch);
    virtual giac::gen value() const;
    Gen_Output(int X,int Y,int W,int H,const char * l=0):Fl_Multiline_Output(X,Y,W,H,l),g(0) { Fl_Multiline_Output::value("0");     color(FL_WHITE); }
  };

  class Enlargable_Multiline_Output:public Fl_Multiline_Output {
  public:
    Enlargable_Multiline_Output(int x,int y,int w,int h,const char * l=0):Fl_Multiline_Output(x,y,w,h,l) {}
    void resize();
    void value(const char * ch);
  };

  class Comment_Multiline_Input:public Fl_Multiline_Input {
  public:
    Comment_Multiline_Input(int x,int y,int w,int h,const char * l=0);
    virtual FL_EXPORT int handle(int);    
    virtual FL_EXPORT int in_handle(int);    
    virtual ~Comment_Multiline_Input() { if (Xcas_input_focus==this) Xcas_input_focus=0;}
  };

  // Convert a pnt to a user-readable string
  std::string pnt2string(const giac::gen & g,const giac::context * contextptr);


#endif // HAVE_LIBFLTK

#ifndef NO_NAMESPACE_XCAS
} // namespace xcas
#endif // ndef NO_NAMESPACE_XCAS

#endif // _INPUT_H