/*
   *  dialog.h -- common declarations for all dialog modules
   *
   *  AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
   *
   *  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 2
   *  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, write to the Free Software
   *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   */
  
  #include <sys/types.h>
  #include <fcntl.h>
  #include <unistd.h>
  #include <ctype.h>
  #include <stdlib.h>
  #include <string.h>
  #include <stdbool.h>
  
  #ifndef KBUILD_NO_NLS
  # include <libintl.h>
  #else
  # define gettext(Msgid) ((const char *) (Msgid))
  #endif
  
  #ifdef __sun__
  #define CURS_MACROS
  #endif
  #include CURSES_LOC
  
  /*
   * Colors in ncurses 1.9.9e do not work properly since foreground and
   * background colors are OR'd rather than separately masked.  This version
   * of dialog was hacked to work with ncurses 1.9.9e, making it incompatible
   * with standard curses.  The simplest fix (to make this work with standard
   * curses) uses the wbkgdset() function, not used in the original hack.
   * Turn it off if we're building with 1.9.9e, since it just confuses things.
   */
  #if defined(NCURSES_VERSION) && defined(_NEED_WRAP) && !defined(GCC_PRINTFLIKE)
  #define OLD_NCURSES 1
  #undef  wbkgdset
  #define wbkgdset(w,p)		/*nothing */
  #else
  #define OLD_NCURSES 0
  #endif
  
  #define TR(params) _tracef params
  
  #define KEY_ESC 27
  #define TAB 9
  #define MAX_LEN 2048
  #define BUF_SIZE (10*1024)
  #define MIN(x,y) (x < y ? x : y)
  #define MAX(x,y) (x > y ? x : y)
  
  #ifndef ACS_ULCORNER
  #define ACS_ULCORNER '+'
  #endif
  #ifndef ACS_LLCORNER
  #define ACS_LLCORNER '+'
  #endif
  #ifndef ACS_URCORNER
  #define ACS_URCORNER '+'
  #endif
  #ifndef ACS_LRCORNER
  #define ACS_LRCORNER '+'
  #endif
  #ifndef ACS_HLINE
  #define ACS_HLINE '-'
  #endif
  #ifndef ACS_VLINE
  #define ACS_VLINE '|'
  #endif
  #ifndef ACS_LTEE
  #define ACS_LTEE '+'
  #endif
  #ifndef ACS_RTEE
  #define ACS_RTEE '+'
  #endif
  #ifndef ACS_UARROW
  #define ACS_UARROW '^'
  #endif
  #ifndef ACS_DARROW
  #define ACS_DARROW 'v'
  #endif
  
  /* error return codes */
  #define ERRDISPLAYTOOSMALL (KEY_MAX + 1)
  
  /*
   *   Color definitions
   */
  struct dialog_color {
  	chtype atr;	/* Color attribute */
  	int fg;		/* foreground */
  	int bg;		/* background */
  	int hl;		/* highlight this item */
  };
  
  struct subtitle_list {
  	struct subtitle_list *next;
  	const char *text;
  };
  
  struct dialog_info {
  	const char *backtitle;
  	struct subtitle_list *subtitles;
  	struct dialog_color screen;
  	struct dialog_color shadow;
  	struct dialog_color dialog;
  	struct dialog_color title;
  	struct dialog_color border;
  	struct dialog_color button_active;
  	struct dialog_color button_inactive;
  	struct dialog_color button_key_active;
  	struct dialog_color button_key_inactive;
  	struct dialog_color button_label_active;
  	struct dialog_color button_label_inactive;
  	struct dialog_color inputbox;
  	struct dialog_color inputbox_border;
  	struct dialog_color searchbox;
  	struct dialog_color searchbox_title;
  	struct dialog_color searchbox_border;
  	struct dialog_color position_indicator;
  	struct dialog_color menubox;
  	struct dialog_color menubox_border;
  	struct dialog_color item;
  	struct dialog_color item_selected;
  	struct dialog_color tag;
  	struct dialog_color tag_selected;
  	struct dialog_color tag_key;
  	struct dialog_color tag_key_selected;
  	struct dialog_color check;
  	struct dialog_color check_selected;
  	struct dialog_color uarrow;
  	struct dialog_color darrow;
  };
  
  /*
   * Global variables
   */
  extern struct dialog_info dlg;
  extern char dialog_input_result[];
  extern int saved_x, saved_y;		/* Needed in signal handler in mconf.c */
  
  /*
   * Function prototypes
   */
  
  /* item list as used by checklist and menubox */
  void item_reset(void);
  void item_make(const char *fmt, ...);
  void item_add_str(const char *fmt, ...);
  void item_set_tag(char tag);
  void item_set_data(void *p);
  void item_set_selected(int val);
  int item_activate_selected(void);
  void *item_data(void);
  char item_tag(void);
  
  /* item list manipulation for lxdialog use */
  #define MAXITEMSTR 200
  struct dialog_item {
  	char str[MAXITEMSTR];	/* promtp displayed */
  	char tag;
  	void *data;	/* pointer to menu item - used by menubox+checklist */
  	int selected;	/* Set to 1 by dialog_*() function if selected. */
  };
  
  /* list of lialog_items */
  struct dialog_list {
  	struct dialog_item node;
  	struct dialog_list *next;
  };
  
  extern struct dialog_list *item_cur;
  extern struct dialog_list item_nil;
  extern struct dialog_list *item_head;
  
  int item_count(void);
  void item_set(int n);
  int item_n(void);
  const char *item_str(void);
  int item_is_selected(void);
  int item_is_tag(char tag);
  #define item_foreach() \
  	for (item_cur = item_head ? item_head: item_cur; \
  	     item_cur && (item_cur != &item_nil); item_cur = item_cur->next)
  
  /* generic key handlers */
  int on_key_esc(WINDOW *win);
  int on_key_resize(void);
  
  /* minimum (re)size values */
  #define CHECKLIST_HEIGTH_MIN 6	/* For dialog_checklist() */
  #define CHECKLIST_WIDTH_MIN 6
  #define INPUTBOX_HEIGTH_MIN 2	/* For dialog_inputbox() */
  #define INPUTBOX_WIDTH_MIN 2
  #define MENUBOX_HEIGTH_MIN 15	/* For dialog_menu() */
  #define MENUBOX_WIDTH_MIN 65
  #define TEXTBOX_HEIGTH_MIN 8	/* For dialog_textbox() */
  #define TEXTBOX_WIDTH_MIN 8
  #define YESNO_HEIGTH_MIN 4	/* For dialog_yesno() */
  #define YESNO_WIDTH_MIN 4
  #define WINDOW_HEIGTH_MIN 19	/* For init_dialog() */
  #define WINDOW_WIDTH_MIN 80
  
  int init_dialog(const char *backtitle);
  void set_dialog_backtitle(const char *backtitle);
  void set_dialog_subtitles(struct subtitle_list *subtitles);
  void end_dialog(int x, int y);
  void attr_clear(WINDOW * win, int height, int width, chtype attr);
  void dialog_clear(void);
  void print_autowrap(WINDOW * win, const char *prompt, int width, int y, int x);
  void print_button(WINDOW * win, const char *label, int y, int x, int selected);
  void print_title(WINDOW *dialog, const char *title, int width);
  void draw_box(WINDOW * win, int y, int x, int height, int width, chtype box,
  	      chtype border);
  void draw_shadow(WINDOW * win, int y, int x, int height, int width);
  
  int first_alpha(const char *string, const char *exempt);
  int dialog_yesno(const char *title, const char *prompt, int height, int width);
  int dialog_msgbox(const char *title, const char *prompt, int height,
  		  int width, int pause);
  
  
  typedef void (*update_text_fn)(char *buf, size_t start, size_t end, void
  			       *_data);
  int dialog_textbox(const char *title, char *tbuf, int initial_height,
  		   int initial_width, int *keys, int *_vscroll, int *_hscroll,
  		   update_text_fn update_text, void *data);
  int dialog_menu(const char *title, const char *prompt,
  		const void *selected, int *s_scroll);
  int dialog_checklist(const char *title, const char *prompt, int height,
  		     int width, int list_height);
  int dialog_inputbox(const char *title, const char *prompt, int height,
  		    int width, const char *init);
  
  /*
   * This is the base for fictitious keys, which activate
   * the buttons.
   *
   * Mouse-generated keys are the following:
   *   -- the first 32 are used as numbers, in addition to '0'-'9'
   *   -- the lowercase are used to signal mouse-enter events (M_EVENT + 'o')
   *   -- uppercase chars are used to invoke the button (M_EVENT + 'O')
   */
  #define M_EVENT (KEY_MAX+1)