hb-glib.cc

/*
 * Copyright © 2009  Red Hat, Inc.
 * Copyright © 2011  Google, Inc.
 *
 *  This is part of HarfBuzz, a text shaping library.
 *
 * Permission is hereby granted, without written agreement and without
 * license or royalty fees, to use, copy, modify, and distribute this
 * software and its documentation for any purpose, provided that the
 * above copyright notice and the following two paragraphs appear in
 * all copies of this software.
 *
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 *
 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
 *
 * Red Hat Author(s): Behdad Esfahbod
 * Google Author(s): Behdad Esfahbod
 */

#include "hb-private.hh"

#include "hb-glib.h"

#include "hb-unicode-private.hh"

#include <glib.h>

HB_BEGIN_DECLS

static const hb_script_t
glib_script_to_script[] =
{
  HB_SCRIPT_COMMON,
  HB_SCRIPT_INHERITED,
  HB_SCRIPT_ARABIC,
  HB_SCRIPT_ARMENIAN,
  HB_SCRIPT_BENGALI,
  HB_SCRIPT_BOPOMOFO,
  HB_SCRIPT_CHEROKEE,
  HB_SCRIPT_COPTIC,
  HB_SCRIPT_CYRILLIC,
  HB_SCRIPT_DESERET,
  HB_SCRIPT_DEVANAGARI,
  HB_SCRIPT_ETHIOPIC,
  HB_SCRIPT_GEORGIAN,
  HB_SCRIPT_GOTHIC,
  HB_SCRIPT_GREEK,
  HB_SCRIPT_GUJARATI,
  HB_SCRIPT_GURMUKHI,
  HB_SCRIPT_HAN,
  HB_SCRIPT_HANGUL,
  HB_SCRIPT_HEBREW,
  HB_SCRIPT_HIRAGANA,
  HB_SCRIPT_KANNADA,
  HB_SCRIPT_KATAKANA,
  HB_SCRIPT_KHMER,
  HB_SCRIPT_LAO,
  HB_SCRIPT_LATIN,
  HB_SCRIPT_MALAYALAM,
  HB_SCRIPT_MONGOLIAN,
  HB_SCRIPT_MYANMAR,
  HB_SCRIPT_OGHAM,
  HB_SCRIPT_OLD_ITALIC,
  HB_SCRIPT_ORIYA,
  HB_SCRIPT_RUNIC,
  HB_SCRIPT_SINHALA,
  HB_SCRIPT_SYRIAC,
  HB_SCRIPT_TAMIL,
  HB_SCRIPT_TELUGU,
  HB_SCRIPT_THAANA,
  HB_SCRIPT_THAI,
  HB_SCRIPT_TIBETAN,
  HB_SCRIPT_CANADIAN_ABORIGINAL,
  HB_SCRIPT_YI,
  HB_SCRIPT_TAGALOG,
  HB_SCRIPT_HANUNOO,
  HB_SCRIPT_BUHID,
  HB_SCRIPT_TAGBANWA,

  /* Unicode-4.0 additions */
  HB_SCRIPT_BRAILLE,
  HB_SCRIPT_CYPRIOT,
  HB_SCRIPT_LIMBU,
  HB_SCRIPT_OSMANYA,
  HB_SCRIPT_SHAVIAN,
  HB_SCRIPT_LINEAR_B,
  HB_SCRIPT_TAI_LE,
  HB_SCRIPT_UGARITIC,

  /* Unicode-4.1 additions */
  HB_SCRIPT_NEW_TAI_LUE,
  HB_SCRIPT_BUGINESE,
  HB_SCRIPT_GLAGOLITIC,
  HB_SCRIPT_TIFINAGH,
  HB_SCRIPT_SYLOTI_NAGRI,
  HB_SCRIPT_OLD_PERSIAN,
  HB_SCRIPT_KHAROSHTHI,

  /* Unicode-5.0 additions */
  HB_SCRIPT_UNKNOWN,
  HB_SCRIPT_BALINESE,
  HB_SCRIPT_CUNEIFORM,
  HB_SCRIPT_PHOENICIAN,
  HB_SCRIPT_PHAGS_PA,
  HB_SCRIPT_NKO,

  /* Unicode-5.1 additions */
  HB_SCRIPT_KAYAH_LI,
  HB_SCRIPT_LEPCHA,
  HB_SCRIPT_REJANG,
  HB_SCRIPT_SUNDANESE,
  HB_SCRIPT_SAURASHTRA,
  HB_SCRIPT_CHAM,
  HB_SCRIPT_OL_CHIKI,
  HB_SCRIPT_VAI,
  HB_SCRIPT_CARIAN,
  HB_SCRIPT_LYCIAN,
  HB_SCRIPT_LYDIAN,

  /* Unicode-5.2 additions */
  HB_SCRIPT_AVESTAN,
  HB_SCRIPT_BAMUM,
  HB_SCRIPT_EGYPTIAN_HIEROGLYPHS,
  HB_SCRIPT_IMPERIAL_ARAMAIC,
  HB_SCRIPT_INSCRIPTIONAL_PAHLAVI,
  HB_SCRIPT_INSCRIPTIONAL_PARTHIAN,
  HB_SCRIPT_JAVANESE,
  HB_SCRIPT_KAITHI,
  HB_SCRIPT_TAI_THAM,
  HB_SCRIPT_LISU,
  HB_SCRIPT_MEETEI_MAYEK,
  HB_SCRIPT_OLD_SOUTH_ARABIAN,
  HB_SCRIPT_OLD_TURKIC,
  HB_SCRIPT_SAMARITAN,
  HB_SCRIPT_TAI_VIET,

  /* Unicode-6.0 additions */
  HB_SCRIPT_BATAK,
  HB_SCRIPT_BRAHMI,
  HB_SCRIPT_MANDAIC
};

hb_script_t
hb_glib_script_to_script (GUnicodeScript script)
{
  if (likely ((unsigned int) script < ARRAY_LENGTH (glib_script_to_script)))
    return glib_script_to_script[script];

  if (unlikely (script == G_UNICODE_SCRIPT_INVALID_CODE))
    return HB_SCRIPT_INVALID;

  return HB_SCRIPT_UNKNOWN;
}

GUnicodeScript
hb_glib_script_from_script (hb_script_t script)
{
  unsigned int count = ARRAY_LENGTH (glib_script_to_script);
  for (unsigned int i = 0; i < count; i++)
    if (glib_script_to_script[i] == script)
      return (GUnicodeScript) i;

  if (unlikely (script == HB_SCRIPT_INVALID))
    return G_UNICODE_SCRIPT_INVALID_CODE;

  return G_UNICODE_SCRIPT_UNKNOWN;
}


static unsigned int
hb_glib_get_combining_class (hb_unicode_funcs_t *ufuncs HB_UNUSED,
                             hb_codepoint_t      unicode,
                             void               *user_data HB_UNUSED)

{
  return g_unichar_combining_class (unicode);
}

static unsigned int
hb_glib_get_eastasian_width (hb_unicode_funcs_t *ufuncs HB_UNUSED,
                             hb_codepoint_t      unicode,
                             void               *user_data HB_UNUSED)
{
  return g_unichar_iswide (unicode) ? 2 : 1;
}

static hb_unicode_general_category_t
hb_glib_get_general_category (hb_unicode_funcs_t *ufuncs HB_UNUSED,
                              hb_codepoint_t      unicode,
                              void               *user_data HB_UNUSED)

{
  /* hb_unicode_general_category_t and GUnicodeType are identical */
  return (hb_unicode_general_category_t) g_unichar_type (unicode);
}

static hb_codepoint_t
hb_glib_get_mirroring (hb_unicode_funcs_t *ufuncs HB_UNUSED,
                       hb_codepoint_t      unicode,
                       void               *user_data HB_UNUSED)
{
  g_unichar_get_mirror_char (unicode, &unicode);
  return unicode;
}

static hb_script_t
hb_glib_get_script (hb_unicode_funcs_t *ufuncs HB_UNUSED,
                    hb_codepoint_t      unicode,
                    void               *user_data HB_UNUSED)
{
  return hb_glib_script_to_script (g_unichar_get_script (unicode));
}

extern HB_INTERNAL hb_unicode_funcs_t _hb_unicode_funcs_glib;
hb_unicode_funcs_t _hb_glib_unicode_funcs = {
  HB_OBJECT_HEADER_STATIC,

  NULL, /* parent */
  TRUE, /* immutable */
  {
    hb_glib_get_combining_class,
    hb_glib_get_eastasian_width,
    hb_glib_get_general_category,
    hb_glib_get_mirroring,
    hb_glib_get_script,
    /* TODO
    hb_glib_compose,
    hb_glib_decompose,
    */
  }
};

hb_unicode_funcs_t *
hb_glib_get_unicode_funcs (void)
{
  return &_hb_glib_unicode_funcs;
}


HB_END_DECLS