Text_gump.cc

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/*
Copyright (C) 2000 The Exult Team

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.
*/

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#ifndef ALPHA_LINUX_CXX
#  include <cstring>
#endif

#include "gamewin.h"
#include "Text_gump.h"

#ifndef UNDER_CE
using std::strchr;
using std::strcpy;
using std::strlen;
#endif

/*
 *  Add to the text, starting a newline.
 */

void Text_gump::add_text
  (
  const char *str
  )
{
  int slen = strlen(str);   // Length of new text.
          // Allocate new space.
  char *newtext = new char[textlen + (textlen != 0) + slen + 1];
  if (textlen)      // Copy over old.
    {
    strcpy(newtext, text);
    // Add new line if not starting a new page and if first char of new string is
    // not a new line
    if (newtext[textlen-1] != '*') newtext[textlen++] = '~';
    }
  strcpy(newtext + textlen, str); // Append new.
  delete [] text;
  text = newtext;
  textlen += slen;
}

/*
 *  Paint a page and find where its text ends.
 *
 *  Output: Index past end of displayed page.
 */

int Text_gump::paint_page
  (
  Rectangle box,      // Display box rel. to gump.
  int start     // Starting offset into text.
  )
{
  const int font = serpentine?8:4;  // Black.
  const int vlead = 1;    // Extra inter-line spacing.
  int ypos = 0;
  int textheight = sman->get_text_height(font) + vlead;
  char *str = text + start;
  while (*str && *str != '*' && ypos + textheight <= box.h)
  {
    if (*str == '~')  // Empty paragraph?
    {
      ypos += textheight;
      str++;
      continue;
    }
          // Look for page break.
    char *epage = strchr(str, '*');
          // Look for line break.
    char *eol = strchr(str, '~');
    if (epage && (!eol || eol > epage))
      eol = epage;
    if (!eol)   // No end found?
      eol = text + textlen;
    char eolchr = *eol; // Save char. at EOL.
    *eol = 0;
    int endoff = sman->paint_text_box(font, str, x + box.x,
        y + box.y + ypos, box.w, box.h - ypos, vlead);
    *eol = eolchr;    // Restore char.
    if (endoff > 0)   // All painted?
    {   // Value returned is height.
      str = eol + (eolchr == '~');
      ypos += endoff;
    }
    else      // Out of room.
    {
      str += -endoff;
      break;
    }
  }
  if (*str == '*')    // Saw end of page?
    str++;
  gwin->set_painted();    // Force blit.
  return (str - text);    // Return offset past end.
}

/*
 *  Show next page(s) of book or scroll.
 *
 *  Output: 0 if already at end.
 */

int Text_gump::show_next_page
  (
  )
{
  if (curend >= textlen)
    return (0);   // That's all, folks.
  curtop = curend;    // Start next page or pair of pages.
  paint();      // Paint.  This updates curend.
  return (1);
}

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