text: /*
   * tuiview.c - A (very) simple text viewer.
   *
   * Written by
   *  Ettore Perazzoli <ettore@comm2000.it>
   *
   * This file is part of VICE, the Versatile Commodore Emulator.
   * See README for copyright notice.
   *
   *  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., 59 Temple Place, Suite 330, Boston, MA
   *  02111-1307  USA.
   *
   */
  
  #include "vice.h"
  
  #include <conio.h>
  #include <keys.h>
  #include <pc.h>
  #include <stdio.h>
  #include <string.h>
  
  #include "tui.h"
  #include "tui_backend.h"
  #include "util.h"
  
  void tui_view_text(int width, int height, const char *title, const char *text)
  {
      const char *p;
      int x, y, i;
      int need_update = 1;
      tui_area_t backing_store = NULL;
  
      x = CENTER_X(width);
      y = CENTER_Y(height);
  
      tui_display_window(x, y, width, height, MESSAGE_BORDER, MESSAGE_BACK, title, &backing_store);
      
      tui_set_attr(MESSAGE_BORDER, MESSAGE_BACK, 0);
      tui_put_char(x + width - 1, y + 1, 0x1e); /* Up arrow */
      tui_put_char(x + width - 1, y + height - 2, 0x1f); /* Down arrow */
      for (i = y + 2; i < y + height - 2; i++) {
          tui_put_char(x + width - 1, i, 0xb1);
      }
  
      tui_set_attr(MESSAGE_FORE, MESSAGE_BACK, 0);
      p = text;
      while (1) {
          int key;
  
          if (need_update) {
              tui_display_text(x + 2, y + 1, width - 4, height - 2, p);
              need_update = 0;
          }
  	
          key = getkey();
  
          switch (key) {
              case K_Escape:
              case K_Return:
                  tui_area_put(backing_store, x, y);
                  tui_area_free(backing_store);
                  return;
              case K_Up:
              case K_Left:
                  p = util_find_prev_line(text, p);
                  need_update = 1;
                  break;
              case K_Down:
              case K_Right:
                  p = util_find_next_line(p);
                  need_update = 1;
                  break;
              case K_PageDown:
                  for (i = 0; i < height - 3; i++) {
                      p = util_find_next_line(p);
                  }
                  need_update = 1;
                  break;
              case K_PageUp:
                  for (i = 0; i < height - 3; i++) {
                      p = util_find_prev_line(text, p);	
                  }
                  need_update = 1;
                  break;
          }
      }
  }
  