src/hb-glib.cc

   1 /*
   2  * Copyright (C) 2009  Red Hat, Inc.
   3  *
   4  *  This is part of HarfBuzz, a text shaping library.
   5  *
   6  * Permission is hereby granted, without written agreement and without
   7  * license or royalty fees, to use, copy, modify, and distribute this
   8  * software and its documentation for any purpose, provided that the
   9  * above copyright notice and the following two paragraphs appear in
  10  * all copies of this software.
  11  *
  12  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
  13  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
  14  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
  15  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
  16  * DAMAGE.
  17  *
  18  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
  19  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  20  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
  21  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
  22  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
  23  *
  24  * Red Hat Author(s): Behdad Esfahbod
  25  */
  26
  27 #include "hb-private.h"
  28
  29 #include "hb-glib.h"
  30
  31 #include "hb-unicode-private.hh"
  32
  33 #include <glib.h>
  34
  35 HB_BEGIN_DECLS
  36
  37 static const hb_script_t
  38 glib_script_to_script[] =
  39 {
  40   HB_SCRIPT_COMMON,
  41   HB_SCRIPT_INHERITED,
  42   HB_SCRIPT_ARABIC,
  43   HB_SCRIPT_ARMENIAN,
  44   HB_SCRIPT_BENGALI,
  45   HB_SCRIPT_BOPOMOFO,
  46   HB_SCRIPT_CHEROKEE,
  47   HB_SCRIPT_COPTIC,
  48   HB_SCRIPT_CYRILLIC,
  49   HB_SCRIPT_DESERET,
  50   HB_SCRIPT_DEVANAGARI,
  51   HB_SCRIPT_ETHIOPIC,
  52   HB_SCRIPT_GEORGIAN,
  53   HB_SCRIPT_GOTHIC,
  54   HB_SCRIPT_GREEK,
  55   HB_SCRIPT_GUJARATI,
  56   HB_SCRIPT_GURMUKHI,
  57   HB_SCRIPT_HAN,
  58   HB_SCRIPT_HANGUL,
  59   HB_SCRIPT_HEBREW,
  60   HB_SCRIPT_HIRAGANA,
  61   HB_SCRIPT_KANNADA,
  62   HB_SCRIPT_KATAKANA,
  63   HB_SCRIPT_KHMER,
  64   HB_SCRIPT_LAO,
  65   HB_SCRIPT_LATIN,
  66   HB_SCRIPT_MALAYALAM,
  67   HB_SCRIPT_MONGOLIAN,
  68   HB_SCRIPT_MYANMAR,
  69   HB_SCRIPT_OGHAM,
  70   HB_SCRIPT_OLD_ITALIC,
  71   HB_SCRIPT_ORIYA,
  72   HB_SCRIPT_RUNIC,
  73   HB_SCRIPT_SINHALA,
  74   HB_SCRIPT_SYRIAC,
  75   HB_SCRIPT_TAMIL,
  76   HB_SCRIPT_TELUGU,
  77   HB_SCRIPT_THAANA,
  78   HB_SCRIPT_THAI,
  79   HB_SCRIPT_TIBETAN,
  80   HB_SCRIPT_CANADIAN_ABORIGINAL,
  81   HB_SCRIPT_YI,
  82   HB_SCRIPT_TAGALOG,
  83   HB_SCRIPT_HANUNOO,
  84   HB_SCRIPT_BUHID,
  85   HB_SCRIPT_TAGBANWA,
  86
  87   /* Unicode-4.0 additions */
  88   HB_SCRIPT_BRAILLE,
  89   HB_SCRIPT_CYPRIOT,
  90   HB_SCRIPT_LIMBU,
  91   HB_SCRIPT_OSMANYA,
  92   HB_SCRIPT_SHAVIAN,
  93   HB_SCRIPT_LINEAR_B,
  94   HB_SCRIPT_TAI_LE,
  95   HB_SCRIPT_UGARITIC,
  96
  97   /* Unicode-4.1 additions */
  98   HB_SCRIPT_NEW_TAI_LUE,
  99   HB_SCRIPT_BUGINESE,
 100   HB_SCRIPT_GLAGOLITIC,
 101   HB_SCRIPT_TIFINAGH,
 102   HB_SCRIPT_SYLOTI_NAGRI,
 103   HB_SCRIPT_OLD_PERSIAN,
 104   HB_SCRIPT_KHAROSHTHI,
 105
 106   /* Unicode-5.0 additions */
 107   HB_SCRIPT_UNKNOWN,
 108   HB_SCRIPT_BALINESE,
 109   HB_SCRIPT_CUNEIFORM,
 110   HB_SCRIPT_PHOENICIAN,
 111   HB_SCRIPT_PHAGS_PA,
 112   HB_SCRIPT_NKO,
 113
 114   /* Unicode-5.1 additions */
 115   HB_SCRIPT_KAYAH_LI,
 116   HB_SCRIPT_LEPCHA,
 117   HB_SCRIPT_REJANG,
 118   HB_SCRIPT_SUNDANESE,
 119   HB_SCRIPT_SAURASHTRA,
 120   HB_SCRIPT_CHAM,
 121   HB_SCRIPT_OL_CHIKI,
 122   HB_SCRIPT_VAI,
 123   HB_SCRIPT_CARIAN,
 124   HB_SCRIPT_LYCIAN,
 125   HB_SCRIPT_LYDIAN,
 126
 127   /* Unicode-5.2 additions */
 128   HB_SCRIPT_AVESTAN,
 129   HB_SCRIPT_BAMUM,
 130   HB_SCRIPT_EGYPTIAN_HIEROGLYPHS,
 131   HB_SCRIPT_IMPERIAL_ARAMAIC,
 132   HB_SCRIPT_INSCRIPTIONAL_PAHLAVI,
 133   HB_SCRIPT_INSCRIPTIONAL_PARTHIAN,
 134   HB_SCRIPT_JAVANESE,
 135   HB_SCRIPT_KAITHI,
 136   HB_SCRIPT_TAI_THAM,
 137   HB_SCRIPT_LISU,
 138   HB_SCRIPT_MEETEI_MAYEK,
 139   HB_SCRIPT_OLD_SOUTH_ARABIAN,
 140   HB_SCRIPT_OLD_TURKIC,
 141   HB_SCRIPT_SAMARITAN,
 142   HB_SCRIPT_TAI_VIET,
 143
 144   /* Unicode-6.0 additions */
 145   HB_SCRIPT_BATAK,
 146   HB_SCRIPT_BRAHMI,
 147   HB_SCRIPT_MANDAIC
 148 };
 149
 150 hb_script_t
 151 hb_glib_script_to_script (GUnicodeScript script)
 152 {
 153   if (likely ((unsigned int) script < ARRAY_LENGTH (glib_script_to_script)))
 154     return glib_script_to_script[script];
 155
 156   if (unlikely (script == G_UNICODE_SCRIPT_INVALID_CODE))
 157     return HB_SCRIPT_INVALID;
 158
 159   return HB_SCRIPT_UNKNOWN;
 160 }
 161
 162 GUnicodeScript
 163 hb_glib_script_from_script (hb_script_t script)
 164 {
 165   unsigned int count = ARRAY_LENGTH (glib_script_to_script);
 166   for (unsigned int i = 0; i < count; i++)
 167     if (glib_script_to_script[i] == script)
 168       return (GUnicodeScript) i;
 169
 170   if (unlikely (script == HB_SCRIPT_INVALID))
 171     return G_UNICODE_SCRIPT_INVALID_CODE;
 172
 173   return G_UNICODE_SCRIPT_UNKNOWN;
 174 }
 175
 176
 177 static unsigned int
 178 hb_glib_get_combining_class (hb_unicode_funcs_t *ufuncs,
 179                              hb_codepoint_t      unicode,
 180                              void               *user_data)
 181
 182 {
 183   return g_unichar_combining_class (unicode);
 184 }
 185
 186 static unsigned int
 187 hb_glib_get_eastasian_width (hb_unicode_funcs_t *ufuncs,
 188                              hb_codepoint_t      unicode,
 189                              void               *user_data)
 190 {
 191   return g_unichar_iswide (unicode) ? 2 : 1;
 192 }
 193
 194 static hb_unicode_general_category_t
 195 hb_glib_get_general_category (hb_unicode_funcs_t *ufuncs,
 196                               hb_codepoint_t      unicode,
 197                               void               *user_data)
 198
 199 {
 200   /* hb_unicode_general_category_t and GUnicodeType are identical */
 201   return (hb_unicode_general_category_t) g_unichar_type (unicode);
 202 }
 203
 204 static hb_codepoint_t
 205 hb_glib_get_mirroring (hb_unicode_funcs_t *ufuncs,
 206                        hb_codepoint_t      unicode,
 207                        void               *user_data)
 208 {
 209   g_unichar_get_mirror_char (unicode, &unicode);
 210   return unicode;
 211 }
 212
 213 static hb_script_t
 214 hb_glib_get_script (hb_unicode_funcs_t *ufuncs,
 215                     hb_codepoint_t      unicode,
 216                     void               *user_data)
 217 {
 218   return hb_glib_script_to_script (g_unichar_get_script (unicode));
 219 }
 220
 221 static hb_unicode_funcs_t glib_ufuncs = {
 222   HB_REFERENCE_COUNT_INVALID, /* ref_count */
 223   NULL, /* parent */
 224   TRUE, /* immutable */
 225   {
 226     hb_glib_get_combining_class,
 227     hb_glib_get_eastasian_width,
 228     hb_glib_get_general_category,
 229     hb_glib_get_mirroring,
 230     hb_glib_get_script
 231   }
 232 };
 233
 234 hb_unicode_funcs_t *
 235 hb_glib_get_unicode_funcs (void)
 236 {
 237   return &glib_ufuncs;
 238 }
 239
 240
 241 HB_END_DECLS