src/hb-glib.cc

   1 /*
   2  * Copyright © 2009  Red Hat, Inc.
   3  * Copyright © 2011  Google, Inc.
   4  *
   5  *  This is part of HarfBuzz, a text shaping library.
   6  *
   7  * Permission is hereby granted, without written agreement and without
   8  * license or royalty fees, to use, copy, modify, and distribute this
   9  * software and its documentation for any purpose, provided that the
  10  * above copyright notice and the following two paragraphs appear in
  11  * all copies of this software.
  12  *
  13  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
  14  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
  15  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
  16  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
  17  * DAMAGE.
  18  *
  19  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
  20  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  21  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
  22  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
  23  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
  24  *
  25  * Red Hat Author(s): Behdad Esfahbod
  26  * Google Author(s): Behdad Esfahbod
  27  */
  28
  29 #include "hb-private.hh"
  30
  31 #include "hb-glib.h"
  32
  33 #include "hb-unicode-private.hh"
  34
  35 #include <glib.h>
  36
  37 HB_BEGIN_DECLS
  38
  39 static const hb_script_t
  40 glib_script_to_script[] =
  41 {
  42   HB_SCRIPT_COMMON,
  43   HB_SCRIPT_INHERITED,
  44   HB_SCRIPT_ARABIC,
  45   HB_SCRIPT_ARMENIAN,
  46   HB_SCRIPT_BENGALI,
  47   HB_SCRIPT_BOPOMOFO,
  48   HB_SCRIPT_CHEROKEE,
  49   HB_SCRIPT_COPTIC,
  50   HB_SCRIPT_CYRILLIC,
  51   HB_SCRIPT_DESERET,
  52   HB_SCRIPT_DEVANAGARI,
  53   HB_SCRIPT_ETHIOPIC,
  54   HB_SCRIPT_GEORGIAN,
  55   HB_SCRIPT_GOTHIC,
  56   HB_SCRIPT_GREEK,
  57   HB_SCRIPT_GUJARATI,
  58   HB_SCRIPT_GURMUKHI,
  59   HB_SCRIPT_HAN,
  60   HB_SCRIPT_HANGUL,
  61   HB_SCRIPT_HEBREW,
  62   HB_SCRIPT_HIRAGANA,
  63   HB_SCRIPT_KANNADA,
  64   HB_SCRIPT_KATAKANA,
  65   HB_SCRIPT_KHMER,
  66   HB_SCRIPT_LAO,
  67   HB_SCRIPT_LATIN,
  68   HB_SCRIPT_MALAYALAM,
  69   HB_SCRIPT_MONGOLIAN,
  70   HB_SCRIPT_MYANMAR,
  71   HB_SCRIPT_OGHAM,
  72   HB_SCRIPT_OLD_ITALIC,
  73   HB_SCRIPT_ORIYA,
  74   HB_SCRIPT_RUNIC,
  75   HB_SCRIPT_SINHALA,
  76   HB_SCRIPT_SYRIAC,
  77   HB_SCRIPT_TAMIL,
  78   HB_SCRIPT_TELUGU,
  79   HB_SCRIPT_THAANA,
  80   HB_SCRIPT_THAI,
  81   HB_SCRIPT_TIBETAN,
  82   HB_SCRIPT_CANADIAN_ABORIGINAL,
  83   HB_SCRIPT_YI,
  84   HB_SCRIPT_TAGALOG,
  85   HB_SCRIPT_HANUNOO,
  86   HB_SCRIPT_BUHID,
  87   HB_SCRIPT_TAGBANWA,
  88
  89   /* Unicode-4.0 additions */
  90   HB_SCRIPT_BRAILLE,
  91   HB_SCRIPT_CYPRIOT,
  92   HB_SCRIPT_LIMBU,
  93   HB_SCRIPT_OSMANYA,
  94   HB_SCRIPT_SHAVIAN,
  95   HB_SCRIPT_LINEAR_B,
  96   HB_SCRIPT_TAI_LE,
  97   HB_SCRIPT_UGARITIC,
  98
  99   /* Unicode-4.1 additions */
 100   HB_SCRIPT_NEW_TAI_LUE,
 101   HB_SCRIPT_BUGINESE,
 102   HB_SCRIPT_GLAGOLITIC,
 103   HB_SCRIPT_TIFINAGH,
 104   HB_SCRIPT_SYLOTI_NAGRI,
 105   HB_SCRIPT_OLD_PERSIAN,
 106   HB_SCRIPT_KHAROSHTHI,
 107
 108   /* Unicode-5.0 additions */
 109   HB_SCRIPT_UNKNOWN,
 110   HB_SCRIPT_BALINESE,
 111   HB_SCRIPT_CUNEIFORM,
 112   HB_SCRIPT_PHOENICIAN,
 113   HB_SCRIPT_PHAGS_PA,
 114   HB_SCRIPT_NKO,
 115
 116   /* Unicode-5.1 additions */
 117   HB_SCRIPT_KAYAH_LI,
 118   HB_SCRIPT_LEPCHA,
 119   HB_SCRIPT_REJANG,
 120   HB_SCRIPT_SUNDANESE,
 121   HB_SCRIPT_SAURASHTRA,
 122   HB_SCRIPT_CHAM,
 123   HB_SCRIPT_OL_CHIKI,
 124   HB_SCRIPT_VAI,
 125   HB_SCRIPT_CARIAN,
 126   HB_SCRIPT_LYCIAN,
 127   HB_SCRIPT_LYDIAN,
 128
 129   /* Unicode-5.2 additions */
 130   HB_SCRIPT_AVESTAN,
 131   HB_SCRIPT_BAMUM,
 132   HB_SCRIPT_EGYPTIAN_HIEROGLYPHS,
 133   HB_SCRIPT_IMPERIAL_ARAMAIC,
 134   HB_SCRIPT_INSCRIPTIONAL_PAHLAVI,
 135   HB_SCRIPT_INSCRIPTIONAL_PARTHIAN,
 136   HB_SCRIPT_JAVANESE,
 137   HB_SCRIPT_KAITHI,
 138   HB_SCRIPT_TAI_THAM,
 139   HB_SCRIPT_LISU,
 140   HB_SCRIPT_MEETEI_MAYEK,
 141   HB_SCRIPT_OLD_SOUTH_ARABIAN,
 142   HB_SCRIPT_OLD_TURKIC,
 143   HB_SCRIPT_SAMARITAN,
 144   HB_SCRIPT_TAI_VIET,
 145
 146   /* Unicode-6.0 additions */
 147   HB_SCRIPT_BATAK,
 148   HB_SCRIPT_BRAHMI,
 149   HB_SCRIPT_MANDAIC
 150 };
 151
 152 hb_script_t
 153 hb_glib_script_to_script (GUnicodeScript script)
 154 {
 155   if (likely ((unsigned int) script < ARRAY_LENGTH (glib_script_to_script)))
 156     return glib_script_to_script[script];
 157
 158   if (unlikely (script == G_UNICODE_SCRIPT_INVALID_CODE))
 159     return HB_SCRIPT_INVALID;
 160
 161   return HB_SCRIPT_UNKNOWN;
 162 }
 163
 164 GUnicodeScript
 165 hb_glib_script_from_script (hb_script_t script)
 166 {
 167   unsigned int count = ARRAY_LENGTH (glib_script_to_script);
 168   for (unsigned int i = 0; i < count; i++)
 169     if (glib_script_to_script[i] == script)
 170       return (GUnicodeScript) i;
 171
 172   if (unlikely (script == HB_SCRIPT_INVALID))
 173     return G_UNICODE_SCRIPT_INVALID_CODE;
 174
 175   return G_UNICODE_SCRIPT_UNKNOWN;
 176 }
 177
 178
 179 static unsigned int
 180 hb_glib_get_combining_class (hb_unicode_funcs_t *ufuncs,
 181                              hb_codepoint_t      unicode,
 182                              void               *user_data)
 183
 184 {
 185   return g_unichar_combining_class (unicode);
 186 }
 187
 188 static unsigned int
 189 hb_glib_get_eastasian_width (hb_unicode_funcs_t *ufuncs,
 190                              hb_codepoint_t      unicode,
 191                              void               *user_data)
 192 {
 193   return g_unichar_iswide (unicode) ? 2 : 1;
 194 }
 195
 196 static hb_unicode_general_category_t
 197 hb_glib_get_general_category (hb_unicode_funcs_t *ufuncs,
 198                               hb_codepoint_t      unicode,
 199                               void               *user_data)
 200
 201 {
 202   /* hb_unicode_general_category_t and GUnicodeType are identical */
 203   return (hb_unicode_general_category_t) g_unichar_type (unicode);
 204 }
 205
 206 static hb_codepoint_t
 207 hb_glib_get_mirroring (hb_unicode_funcs_t *ufuncs,
 208                        hb_codepoint_t      unicode,
 209                        void               *user_data)
 210 {
 211   g_unichar_get_mirror_char (unicode, &unicode);
 212   return unicode;
 213 }
 214
 215 static hb_script_t
 216 hb_glib_get_script (hb_unicode_funcs_t *ufuncs,
 217                     hb_codepoint_t      unicode,
 218                     void               *user_data)
 219 {
 220   return hb_glib_script_to_script (g_unichar_get_script (unicode));
 221 }
 222
 223 extern HB_INTERNAL hb_unicode_funcs_t _hb_unicode_funcs_glib;
 224 hb_unicode_funcs_t _hb_glib_unicode_funcs = {
 225   HB_OBJECT_HEADER_STATIC,
 226
 227   NULL, /* parent */
 228   TRUE, /* immutable */
 229   {
 230     hb_glib_get_combining_class,
 231     hb_glib_get_eastasian_width,
 232     hb_glib_get_general_category,
 233     hb_glib_get_mirroring,
 234     hb_glib_get_script
 235   }
 236 };
 237
 238 hb_unicode_funcs_t *
 239 hb_glib_get_unicode_funcs (void)
 240 {
 241   return &_hb_glib_unicode_funcs;
 242 }
 243
 244
 245 HB_END_DECLS