/* $OpenBSD: m_post.c,v 1.8 2023/10/17 09:52:10 nicm Exp $ */

/****************************************************************************
 * Copyright 2020-2021,2022 Thomas E. Dickey                                *
 * Copyright 1998-2010,2012 Free Software Foundation, Inc.                  *
 *                                                                          *
 * Permission is hereby granted, free of charge, to any person obtaining a  *
 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
 * without limitation the rights to use, copy, modify, merge, publish,      *
 * distribute, distribute with modifications, sublicense, and/or sell       *
 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
 *                                                                          *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
 *                                                                          *
 * Except as contained in this notice, the name(s) of the above copyright   *
 * holders shall not be used in advertising or otherwise to promote the     *
 * sale, use or other dealings in this Software without prior written       *
 * authorization.                                                           *
 ****************************************************************************/

/****************************************************************************
 *   Author:  Juergen Pfeifer, 1995,1997                                    *
 ****************************************************************************/

/***************************************************************************
* Module m_post                                                            *
* Write or erase menus from associated subwindows                          *
***************************************************************************/

#include "menu.priv.h"

MODULE_ID("$Id: m_post.c,v 1.8 2023/10/17 09:52:10 nicm Exp $")

/*---------------------------------------------------------------------------
|   Facility      :  libnmenu
|   Function      :  void _nc_Post_Item(MENU *menu, ITEM *item)
|
|   Description   :  Draw the item in the menus window at the current
|                    window position
|
|   Return Values :  -
+--------------------------------------------------------------------------*/
MENU_EXPORT(void)
_nc_Post_Item(const MENU *menu, const ITEM *item)
{
  int i;
  chtype ch;
  int item_x, item_y;
  int count = 0;
  bool isfore = FALSE, isback = FALSE, isgrey = FALSE;
  int name_len;

  assert(menu->win);

  getyx(menu->win, item_y, item_x);

  /* We need a marker iff
     - it is a onevalued menu and it is the current item
     - or it has a selection value
   */
  wattron(menu->win, (int)menu->back);
  if (item->value || (item == menu->curitem))
    {
      if (menu->marklen)
        {
          /* In a multi selection menu we use the fore attribute
             for a selected marker that is not the current one.
             This improves visualization of the menu, because now
             always the 'normal' marker denotes the current
             item. */
          if (!(menu->opt & O_ONEVALUE) && item->value && item != menu->curitem)
            {
              wattron(menu->win, (int)menu->fore);
              isfore = TRUE;
            }
          waddstr(menu->win, menu->mark);
          if (isfore)
            {
              wattron(menu->win, (int)menu->fore);
              isfore = FALSE;
            }
        }
    }
  else                          /* otherwise we have to wipe out the marker area */
    for (ch = ' ', i = menu->marklen; i > 0; i--)
      waddch(menu->win, ch);
  wattroff(menu->win, (int)menu->back);
  count += menu->marklen;

  /* First we have to calculate the attribute depending on selectability
     and selection status
   */
  if (!(item->opt & O_SELECTABLE))
    {
      wattron(menu->win, (int)menu->grey);
      isgrey = TRUE;
    }
  else
    {
      if (item->value || item == menu->curitem)
        {
          wattron(menu->win, (int)menu->fore);
          isfore = TRUE;
        }
      else
        {
          wattron(menu->win, (int)menu->back);
          isback = TRUE;
        }
    }

  waddnstr(menu->win, item->name.str, item->name.length);
  name_len = _nc_Calculate_Text_Width(&(item->name));
  for (ch = ' ', i = menu->namelen - name_len; i > 0; i--)
    {
      waddch(menu->win, ch);
    }
  count += menu->namelen;

  /* Show description if required and available */
  if ((menu->opt & O_SHOWDESC) && menu->desclen > 0)
    {
      int m = menu->spc_desc / 2;
      int cy = -1, cx = -1;
      int desc_len;

      for (ch = ' ', i = 0; i < menu->spc_desc; i++)
        {
          if (i == m)
            {
              waddch(menu->win, menu->pad);
              getyx(menu->win, cy, cx);
            }
          else
            waddch(menu->win, ch);
        }
      if (item->description.length)
        waddnstr(menu->win, item->description.str, item->description.length);
      desc_len = _nc_Calculate_Text_Width(&(item->description));
      for (ch = ' ', i = menu->desclen - desc_len; i > 0; i--)
        {
          waddch(menu->win, ch);
        }
      count += menu->desclen + menu->spc_desc;

      if (menu->spc_rows > 1)
        {
          int j, k, ncy, ncx;

          assert(cx >= 0 && cy >= 0);
          getyx(menu->win, ncy, ncx);
          if (isgrey)
            wattroff(menu->win, (int)menu->grey);
          else if (isfore)
            wattroff(menu->win, (int)menu->fore);
          wattron(menu->win, (int)menu->back);
          for (j = 1; j < menu->spc_rows; j++)
            {
              if ((item_y + j) < getmaxy(menu->win))
                {
                  wmove(menu->win, item_y + j, item_x);
                  for (k = 0; k < count; k++)
                    waddch(menu->win, ' ');
                }
              if ((cy + j) < getmaxy(menu->win))
                (void)mvwaddch(menu->win, cy + j, cx - 1, menu->pad);
            }
          wmove(menu->win, ncy, ncx);
          if (!isback)
            wattroff(menu->win, (int)menu->back);
        }
    }

  /* Remove attributes */
  if (isfore)
    wattroff(menu->win, (int)menu->fore);
  if (isback)
    wattroff(menu->win, (int)menu->back);
  if (isgrey)
    wattroff(menu->win, (int)menu->grey);
}

/*---------------------------------------------------------------------------
|   Facility      :  libnmenu
|   Function      :  void _nc_Draw_Menu(const MENU *)
|
|   Description   :  Display the menu in its windows
|
|   Return Values :  -
+--------------------------------------------------------------------------*/
MENU_EXPORT(void)
_nc_Draw_Menu(const MENU *menu)
{
  ITEM *item = menu->items[0];
  ITEM *lastvert;
  ITEM *hitem;
  chtype s_bkgd;

  assert(item && menu->win);

  s_bkgd = getbkgd(menu->win);
  wbkgdset(menu->win, menu->back);
  werase(menu->win);
  wbkgdset(menu->win, s_bkgd);

  lastvert = (menu->opt & O_NONCYCLIC) ? (ITEM *)0 : item;

  if (item != NULL)
    {
      int y = 0;

      do
        {
          ITEM *lasthor;

          wmove(menu->win, y, 0);

          hitem = item;
          lasthor = (menu->opt & O_NONCYCLIC) ? (ITEM *)0 : hitem;

          do
            {
              _nc_Post_Item(menu, hitem);

              wattron(menu->win, (int)menu->back);
              if (((hitem = hitem->right) != lasthor) && hitem)
                {
                  int i, j, cy, cx;
                  chtype ch = ' ';

                  getyx(menu->win, cy, cx);
                  for (j = 0; j < menu->spc_rows; j++)
                    {
                      wmove(menu->win, cy + j, cx);
                      for (i = 0; i < menu->spc_cols; i++)
                        {
                          waddch(menu->win, ch);
                        }
                    }
                  wmove(menu->win, cy, cx + menu->spc_cols);
                }
            }
          while (hitem && (hitem != lasthor));
          wattroff(menu->win, (int)menu->back);

          item = item->down;
          y += menu->spc_rows;

        }
      while (item && (item != lastvert));
    }
}

/*---------------------------------------------------------------------------
|   Facility      :  libnmenu
|   Function      :  int post_menu(MENU* menu)
|
|   Description   :  Post a menu to the screen. This makes it visible.
|
|   Return Values :  E_OK                - success
|                    E_BAD_ARGUMENT      - not a valid menu pointer
|                    E_SYSTEM_ERROR      - error in lower layers
|                    E_NOT_CONNECTED     - No items connected to menu
|                    E_BAD_STATE         - Menu in userexit routine
|                    E_POSTED            - Menu already posted
+--------------------------------------------------------------------------*/
MENU_EXPORT(int)
post_menu(MENU *menu)
{
  T((T_CALLED("post_menu(%p)"), (void *)menu));

  if (!menu)
    RETURN(E_BAD_ARGUMENT);

  if (menu->status & _IN_DRIVER)
    RETURN(E_BAD_STATE);

  if (menu->status & _POSTED)
    RETURN(E_POSTED);

  if (menu->items && *(menu->items))
    {
      int h = 1 + menu->spc_rows * (menu->rows - 1);

      WINDOW *win = Get_Menu_Window(menu);
      int maxy = getmaxy(win);

      if ((menu->win = newpad(h, menu->width)))
        {
          int y = (maxy >= h) ? h : maxy;

          if (y >= menu->height)
            y = menu->height;
          if (!(menu->sub = subpad(menu->win, y, menu->width, 0, 0)))
            RETURN(E_SYSTEM_ERROR);
        }
      else
        RETURN(E_SYSTEM_ERROR);

      if (menu->status & _LINK_NEEDED)
        _nc_Link_Items(menu);
    }
  else
    RETURN(E_NOT_CONNECTED);

  SetStatus(menu, _POSTED);

  if (!(menu->opt & O_ONEVALUE))
    {
      ITEM **items;

      for (items = menu->items; *items; items++)
        {
          (*items)->value = FALSE;
        }
    }

  _nc_Draw_Menu(menu);

  Call_Hook(menu, menuinit);
  Call_Hook(menu, iteminit);

  _nc_Show_Menu(menu);

  RETURN(E_OK);
}

/*---------------------------------------------------------------------------
|   Facility      :  libnmenu
|   Function      :  int unpost_menu(MENU*)
|
|   Description   :  Detach menu from screen
|
|   Return Values :  E_OK              - success
|                    E_BAD_ARGUMENT    - not a valid menu pointer
|                    E_BAD_STATE       - menu in userexit routine
|                    E_NOT_POSTED      - menu is not posted
+--------------------------------------------------------------------------*/
MENU_EXPORT(int)
unpost_menu(MENU *menu)
{
  WINDOW *win;

  T((T_CALLED("unpost_menu(%p)"), (void *)menu));

  if (!menu)
    RETURN(E_BAD_ARGUMENT);

  if (menu->status & _IN_DRIVER)
    RETURN(E_BAD_STATE);

  if (!(menu->status & _POSTED))
    RETURN(E_NOT_POSTED);

  Call_Hook(menu, itemterm);
  Call_Hook(menu, menuterm);

  win = Get_Menu_Window(menu);
  werase(win);
  wsyncup(win);

  assert(menu->sub);
  delwin(menu->sub);
  menu->sub = (WINDOW *)0;

  assert(menu->win);
  delwin(menu->win);
  menu->win = (WINDOW *)0;

  ClrStatus(menu, _POSTED);

  RETURN(E_OK);
}

/* m_post.c ends here */