#ifndef FL_NATIVE_FILE_CHOOSER_H
#define FL_NATIVE_FILE_CHOOSER_H

#include <FL/Enumerations.H>
#if defined(USE_NEW_FLTK_FEATURES) && FL_PATCH_VERSION < 3
#undef FL_PATCH_VERSION
#define FL_PATCH_VERSION 3
#endif
#define SEAVIEW_FLTK_VERSION 100*FL_MAJOR_VERSION + 10*FL_MINOR_VERSION + FL_PATCH_VERSION
#if SEAVIEW_FLTK_VERSION < 133 && !(defined(__APPLE__) || defined(WIN32))
#define Fl_Native_File_Chooser mgFl_Native_File_Chooser
#endif

#define USE_GTK_FILE_CHOOSER 1 /* forces use of GTK file chooser when available */

// Use Windows' chooser
#ifdef WIN32
// #define _WIN32_WINNT	0x0501	// needed for OPENFILENAME's 'FlagsEx'
#  include <stdio.h>
#  include <stdlib.h>		// malloc
#  include <windows.h>
#  include <commdlg.h>		// OPENFILENAME, GetOpenFileName()
#  include <shlobj.h>		// BROWSEINFO, SHBrowseForFolder()
#endif

// Use Apple's chooser
#ifdef __APPLE__
#  define MAXFILTERS	80
#endif

// All else falls back to FLTK's own chooser
#if ! defined(__APPLE__) && !defined(WIN32)
#  include <FL/Fl_File_Chooser.H>
#else
#  include <FL/filename.H>	// FL_EXPORT
#endif

class mgFl_FLTK_File_Chooser;
class mgFl_GTK_File_Chooser;

class FL_EXPORT Fl_Native_File_Chooser {
public:
  enum Type {
    BROWSE_FILE = 0,			///< browse files (lets user choose one file)
    BROWSE_DIRECTORY,			///< browse directories (lets user choose one directory)
    BROWSE_MULTI_FILE,			///< browse files (lets user choose multiple files)
    BROWSE_MULTI_DIRECTORY,		///< browse directories (lets user choose multiple directories)
    BROWSE_SAVE_FILE,			///< browse to save a file
    BROWSE_SAVE_DIRECTORY		///< browse to save a directory
  };
  enum Option {
    NO_OPTIONS     = 0x0000,		///< no options enabled
    SAVEAS_CONFIRM = 0x0001,		///< Show native 'Save As' overwrite confirm dialog (if supported)
    NEW_FOLDER     = 0x0002,		///< Show 'New Folder' icon (if supported)
    PREVIEW        = 0x0004,		///< enable preview mode
    USE_FILTER_EXT = 0x0008		///< Chooser filter pilots the output file extension
  };
  /** Localizable message */
  static const char *file_exists_message;
  
public:
  Fl_Native_File_Chooser(int val=BROWSE_FILE);
  ~Fl_Native_File_Chooser();
  
  // Public methods
  void type(int t);
  int type() const ;
  void options(int o);
  int options() const;
  int count() const;
  const char *filename() const ;
  const char *filename(int i) const ;
  void directory(const char *val) ;
  const char *directory() const;
  void title(const char *t);
  const char* title() const;
  const char *filter() const ;
  void filter(const char *f);
  int filters() const ;
  void filter_value(int i) ;
  int filter_value() const ;
  void preset_file(const char*f) ;
  const char* preset_file() const;
  const char *errmsg() const ;
  int show() ;
  
#ifdef WIN32
private:
  int  _btype;			// kind-of browser to show()
  int  _options;		// general options
  OPENFILENAMEW _ofn;		// GetOpenFileName() & GetSaveFileName() struct
  BROWSEINFO   _binf;		// SHBrowseForFolder() struct
  char  **_pathnames;		// array of pathnames
  int     _tpathnames;		// total pathnames
  char   *_directory;		// default pathname to use
  char   *_title;		// title for window
  char   *_filter;		// user-side search filter
  char   *_parsedfilt;		// filter parsed for Windows dialog
  int     _nfilters;		// number of filters parse_filter counted
  char   *_preset_file;		// the file to preselect
  char   *_errmsg;		// error message
  
  // Private methods
  void errmsg(const char *msg);
  
  void clear_pathnames();
  void set_single_pathname(const char *s);
  void add_pathname(const char *s);
  
  void FreePIDL(LPITEMIDLIST pidl);
  void ClearOFN();
  void ClearBINF();
  void Win2Unix(char *s);
  void Unix2Win(char *s);
  int showfile();
  static int CALLBACK Dir_CB(HWND win, UINT msg, LPARAM param, LPARAM data);
  int showdir();
  
  void parse_filter(const char *);
  void clear_filters();
  void add_filter(const char *, const char *);
#endif

#ifdef __APPLE__
private:
  int             _btype;		// kind-of browser to show()
  int             _options;		// general options
  void 	         *_panel;
  char          **_pathnames;		// array of pathnames
  int             _tpathnames;	        // total pathnames
  char           *_directory;		// default pathname to use
  char           *_title;		// title for window
  char           *_preset_file;	        // the 'save as' filename
  
  char           *_filter;		// user-side search filter, eg:
  // C Files\t*.[ch]\nText Files\t*.txt"
  
  char           *_filt_names;		// filter names (tab delimited)
  // eg. "C Files\tText Files"
  
  char           *_filt_patt[MAXFILTERS];
  // array of filter patterns, eg:
  //     _filt_patt[0]="*.{cxx,h}"
  //     _filt_patt[1]="*.txt"
  
  int             _filt_total;		// parse_filter() # of filters loaded
  int             _filt_value;		// index of the selected filter
  char           *_errmsg;		// error message
  
  // Private methods
  void errmsg(const char *msg);
  void clear_pathnames();
  void set_single_pathname(const char *s);
  int get_saveas_basename(void);
  void clear_filters();
  void add_filter(const char *, const char *);
  void parse_filter(const char *from);
  int post();
  int runmodal();
#endif

#if ! defined(__APPLE__) && !defined(WIN32)
private:
#if FLTK_ABI_VERSION <= 10302
  int   _btype;			// kind-of browser to show()
  int   _options;		// general options
  int   _nfilters;
  char *_filter;		// user supplied filter
  char *_parsedfilt;		// parsed filter
  int   _filtvalue;		// selected filter
  char *_preset_file;
  char *_prevvalue;		// Returned filename
  char *_directory;
  char *_errmsg;		// error message
#endif
  static int have_looked_for_GTK_libs;
  union {
    mgFl_FLTK_File_Chooser *_x11_file_chooser;
    mgFl_GTK_File_Chooser *_gtk_file_chooser;
  };
#endif
};

#if !defined(__APPLE__) && !defined(WIN32)
class mgFl_FLTK_File_Chooser {
  friend class mgFl_Native_File_Chooser;
protected:
  int   _btype;			// kind-of browser to show()
  int   _options;		// general options
  int   _nfilters;
  char *_filter;		// user supplied filter
  char *_parsedfilt;		// parsed filter
  int   _filtvalue;		// selected filter
  char *_preset_file;
  char *_prevvalue;		// Returned filename
  char *_directory;
  char *_errmsg;		// error message
  mgFl_FLTK_File_Chooser(int val);
  virtual ~mgFl_FLTK_File_Chooser();
  void errmsg(const char *msg);
  int type_fl_file(int);
  void parse_filter();
  int exist_dialog();
  Fl_File_Chooser *_file_chooser;
  virtual void type(int);
  int type() const;
  void options(int);
  int options() const;
  virtual int count() const;
  virtual const char *filename() const;
  virtual const char *filename(int i) const;
  void directory(const char *val);
  const char *directory() const;
  virtual void title(const char *);
  virtual const char* title() const;
  const char *filter() const;
  void filter(const char *);
  int filters() const;
  void filter_value(int i);
  int filter_value() const;
  void preset_file(const char*);
  const char* preset_file() const;
  const char *errmsg() const;
  virtual int show();
};

#ifdef USE_GTK_FILE_CHOOSER
class mgFl_GTK_File_Chooser : public mgFl_FLTK_File_Chooser {
  friend class mgFl_Native_File_Chooser;
private:
  typedef struct _GtkWidget GtkWidget;
  typedef struct _GtkFileFilterInfo GtkFileFilterInfo;
  struct pair {
    mgFl_GTK_File_Chooser* running; // the running mgFl_GTK_File_Chooser
    const char *filter; // a filter string of the chooser
    pair(mgFl_GTK_File_Chooser* c, const char *f) {
      running = c; 
      filter = strdup(f);
    };
    ~pair() {
      free((char*)filter);
    };
  };
  GtkWidget *gtkw_ptr; // used to hold a GtkWidget* without pulling GTK into everything...
  void *gtkw_slist; // used to hold a GLib GSList...
  unsigned gtkw_count; // number of files read back - if any
  mutable char *gtkw_filename; // last name we read back
  char *gtkw_title; // the title to be applied to the dialog
  const char *previous_filter;
  
  int fl_gtk_chooser_wrapper(); // method that wraps the GTK widget
  mgFl_GTK_File_Chooser(int val);
  virtual ~mgFl_GTK_File_Chooser();
  static int did_find_GTK_libs;
  static void probe_for_GTK_libs(void);
  virtual void type(int);
  virtual int count() const;
  virtual const char *filename() const;
  virtual const char *filename(int i) const;
  virtual void title(const char *);
  virtual const char* title() const;
  virtual int show();
  void changed_output_type(const char *filter);
  
  static int custom_gtk_filter_function(const GtkFileFilterInfo*, mgFl_GTK_File_Chooser::pair*);
  static void free_pair(pair *p);
};
#endif // USE_GTK_FILE_CHOOSER
#endif // !defined(__APPLE__) && !defined(WIN32)

#endif /*FL_NATIVE_FILE_CHOOSER_H*/
