// -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-

#ifdef    HAVE_CONFIG_H
#  include "../config.h"
#endif // HAVE_CONFIG_H

extern "C" {
#ifdef HAVE_STDLIB_H
#  include <stdlib.h>
#endif // HAVE_STDLIB_H
}

#include <iostream>
#include <algorithm>

#include "font.hh"
#include "surface.hh"
#include "util.hh"
#include "display.hh"
#include "screeninfo.hh"

extern "C" {
#ifdef    HAVE_STDIO_H
#  include <stdio.h>
#endif // HAVE_STDIO_H

#include "gettext.h"
#define _(str) gettext(str)
}

namespace otk {

std::string Font::_fallback_font = "fixed";
bool        Font::_xft_init      = false;

Font::Font(int screen_num, const std::string &fontstring,
             bool shadow, unsigned char offset, unsigned char tint)
  : _screen_num(screen_num),
    _fontstring(fontstring),
    _shadow(shadow),
    _offset(offset),
    _tint(tint),
    _xftfont(0)
{
  assert(screen_num >= 0);
  assert(tint <= CHAR_MAX);
  
  if (!_xft_init) {
    if (!XftInit(0)) {
      printf(_("Couldn't initialize Xft.\n\n"));
      ::exit(3);
    }
    int version = XftGetVersion();
    printf(_("Using Xft %d.%d.%d (Built against %d.%d.%d).\n"),
           version / 10000 % 100, version / 100 % 100, version % 100,
           XFT_MAJOR, XFT_MINOR, XFT_REVISION);
    _xft_init = true;
  }

  if ((_xftfont = XftFontOpenName(**display, _screen_num,
                                  _fontstring.c_str())))
    return;

  printf(_("Unable to load font: %s\n"), _fontstring.c_str());
  printf(_("Trying fallback font: %s\n"), _fallback_font.c_str());

  if ((_xftfont = XftFontOpenName(**display, _screen_num,
                                  _fallback_font.c_str())))
    return;

  printf(_("Unable to load font: %s\n"), _fallback_font.c_str());
  printf(_("Aborting!.\n"));

  ::exit(3); // can't continue without a font
}


Font::~Font(void)
{
  if (_xftfont)
    XftFontClose(**display, _xftfont);
}


unsigned int Font::measureString(const ustring &string) const
{
  XGlyphInfo info;

  if (string.utf8())
    XftTextExtentsUtf8(**display, _xftfont,
                       (FcChar8*)string.c_str(), string.bytes(), &info);
  else
    XftTextExtents8(**display, _xftfont,
                    (FcChar8*)string.c_str(), string.bytes(), &info);

  return info.xOff + (_shadow ? _offset : 0);
}


unsigned int Font::height(void) const
{
  return _xftfont->height + (_shadow ? _offset : 0);
}


unsigned int Font::maxCharWidth(void) const
{
  return _xftfont->max_advance_width;
}

}