server/core/src/util/listbox.c

/* vi: set ts=2:
* +-------------------+  Christian Schlittchen <corwin@amber.kn-bremen.de>
* |                   |  Enno Rehling <enno@eressea.de>
* | Eressea PBEM host |  Katja Zedel <katze@felidae.kn-bremen.de>
* | (c) 1998 - 2006   |  
* |                   |  This program may not be used, modified or distributed
* +-------------------+  without prior permission by the authors of Eressea.
*  
*/

/* wenn platform.h nicht vor curses included wird, kompiliert es unter windows nicht */
#include <curses.h>
#include <platform.h>
#include <kernel/config.h>

#include "listbox.h"
#include "gmtool_structs.h"

#include <util/log.h>

#include <string.h>
#include <ctype.h>

void
insert_selection(list_selection ** p_sel, list_selection * prev,
  const char *str, void *payload)
{
  list_selection *sel = calloc(sizeof(list_selection), 1);
  sel->str = strdup(str);
  sel->data = payload;
  if (*p_sel) {
    list_selection *s;
    sel->next = *p_sel;
    sel->prev = sel->next->prev;
    sel->next->prev = sel;
    if (sel->prev) {
      sel->prev->next = sel;
      sel->index = sel->prev->index + 1;
    }
    for (s = sel->next; s; s = s->next) {
      s->index = s->prev->index + 1;
    }
    *p_sel = sel;
  } else {
    *p_sel = sel;
    sel->prev = prev;
    if (prev)
      sel->index = prev->index + 1;
  }
}

list_selection **push_selection(list_selection ** p_sel, char *str,
  void *payload)
{
  list_selection *sel = calloc(sizeof(list_selection), 1);
  list_selection *prev = NULL;
  sel->str = str;
  sel->data = payload;
  while (*p_sel) {
    prev = *p_sel;
    p_sel = &prev->next;
  }
  *p_sel = sel;
  if (prev) {
    sel->prev = prev;
    sel->index = prev->index + 1;
  }
  return p_sel;
}

#define SX (getmaxx(stdscr))
#define SY (getmaxy(stdscr))

list_selection *do_selection(list_selection * sel, const char *title,
  void (*perform) (list_selection *, void *), void *data)
{
  WINDOW *wn;
  bool update = true;
  list_selection *s;
  list_selection *top = sel;
  list_selection *current = top;
  int i;
  int height = 0, width = (int)strlen(title) + 8;
  for (s = sel; s; s = s->next) {
    if ((int)strlen(s->str) > width) {
      width = (int)strlen(s->str);
    }
    ++height;
    if (verbosity >= 5) {
      log_printf(stdout, "s %s w %d h %d\n", s->str, width, height);
    }
  }
  if (height == 0 || width == 0)
    return 0;
  if (width + 3 > SX)
    width = SX - 4;
  if (height + 2 > SY)
    height = SY - 2;

  if (verbosity >= 5)
    log_printf(stdout, "w %d h %d\n", width, height);

  wn =
    newwin(height + 2, width + 4, (SY - height - 2) / 2, (SX - width - 4) / 2);

  for (;;) {
    int input;
    if (update) {
      for (s = top; s != NULL && top->index + height != s->index; s = s->next) {
        i = s->index - top->index;
        wmove(wn, i + 1, 4);
        waddnstr(wn, s->str, -1);
        wclrtoeol(wn);
      }
      wclrtobot(wn);
      wxborder(wn);
      mvwprintw(wn, 0, 2, "[ %s ]", title);
      update = false;
    }
    i = current->index - top->index;
    wattron(wn, A_BOLD | COLOR_PAIR(COLOR_YELLOW));
    wmove(wn, i + 1, 2);
    waddstr(wn, "->");
    wmove(wn, i + 1, 4);
    waddnstr(wn, current->str, width - 2);
    wattroff(wn, A_BOLD | COLOR_PAIR(COLOR_YELLOW));

    wrefresh(wn);

    input = getch();

    wmove(wn, i + 1, 2);
    waddstr(wn, "  ");
    wmove(wn, i + 1, 4);
    waddnstr(wn, current->str, width);

    switch (input) {
      case KEY_NPAGE:
        for (i = 0; i != height / 2; ++i) {
          if (current->next) {
            current = current->next;
            if (current->index - height >= top->index) {
              top = current;
              update = true;
            }
          }
        }
        break;
      case KEY_PPAGE:
        for (i = 0; i != height / 2; ++i) {
          if (current->prev) {
            if (current == top) {
              top = sel;
              while (top->index + height < current->index)
                top = top->next;
              update = true;
            }
            current = current->prev;
          }
        }
        break;
      case KEY_DOWN:
        if (current->next) {
          current = current->next;
          if (current->index - height >= top->index) {
            top = current;
            update = true;
          }
        }
        break;
      case KEY_UP:
        if (current->prev) {
          if (current == top) {
            top = sel;
            while (top->index + height < current->index)
              top = top->next;
            update = true;
          }
          current = current->prev;
        }
        break;
      case 27:
      case 'q':
        delwin(wn);
        return NULL;
      case 10:
      case 13:
        if (perform)
          perform(current, data);
        else {
          delwin(wn);
          return current;
        }
        break;
      default:
        s = current->next;
        if (s == NULL)
          s = top;
        while (s != current) {
          if (tolower(s->str[0]) == tolower(input)) {
            current = s;
            update = true;
          } else {
            s = s->next;
            if (s == NULL)
              s = top;
          }
        }
        if (current->index - height >= top->index) {
          top = current;
          update = true;
        }
    }
  }
}