src/hb-icu.cc

   1 /*
   2  * Copyright © 2009  Red Hat, Inc.
   3  * Copyright © 2009  Keith Stribley
   4  * Copyright © 2011  Google, Inc.
   5  *
   6  *  This is part of HarfBuzz, a text shaping library.
   7  *
   8  * Permission is hereby granted, without written agreement and without
   9  * license or royalty fees, to use, copy, modify, and distribute this
  10  * software and its documentation for any purpose, provided that the
  11  * above copyright notice and the following two paragraphs appear in
  12  * all copies of this software.
  13  *
  14  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
  15  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
  16  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
  17  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
  18  * DAMAGE.
  19  *
  20  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
  21  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  22  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
  23  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
  24  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
  25  *
  26  * Red Hat Author(s): Behdad Esfahbod
  27  * Google Author(s): Behdad Esfahbod
  28  */
  29
  30 #include "hb-private.hh"
  31
  32 #include "hb-icu.h"
  33
  34 #include "hb-unicode-private.hh"
  35
  36 #include <unicode/uversion.h>
  37 #include <unicode/uchar.h>
  38
  39 HB_BEGIN_DECLS
  40
  41
  42 hb_script_t
  43 hb_icu_script_to_script (UScriptCode script)
  44 {
  45   if (unlikely (script == USCRIPT_INVALID_CODE))
  46     return HB_SCRIPT_INVALID;
  47
  48   return hb_script_from_string (uscript_getShortName (script));
  49 }
  50
  51 UScriptCode
  52 hb_icu_script_from_script (hb_script_t script)
  53 {
  54   if (unlikely (script == HB_SCRIPT_INVALID))
  55     return USCRIPT_INVALID_CODE;
  56
  57   for (unsigned int i = 0; i < USCRIPT_CODE_LIMIT; i++)
  58     if (unlikely (hb_icu_script_to_script ((UScriptCode) i) == script))
  59       return (UScriptCode) i;
  60
  61   return USCRIPT_UNKNOWN;
  62 }
  63
  64
  65 static unsigned int
  66 hb_icu_get_combining_class (hb_unicode_funcs_t *ufuncs HB_UNUSED,
  67                             hb_codepoint_t      unicode,
  68                             void               *user_data HB_UNUSED)
  69
  70 {
  71   return u_getCombiningClass (unicode);
  72 }
  73
  74 static unsigned int
  75 hb_icu_get_eastasian_width (hb_unicode_funcs_t *ufuncs HB_UNUSED,
  76                             hb_codepoint_t      unicode,
  77                             void               *user_data HB_UNUSED)
  78 {
  79   switch (u_getIntPropertyValue(unicode, UCHAR_EAST_ASIAN_WIDTH))
  80   {
  81   case U_EA_WIDE:
  82   case U_EA_FULLWIDTH:
  83     return 2;
  84   case U_EA_NEUTRAL:
  85   case U_EA_AMBIGUOUS:
  86   case U_EA_HALFWIDTH:
  87   case U_EA_NARROW:
  88     return 1;
  89   }
  90   return 1;
  91 }
  92
  93 static hb_unicode_general_category_t
  94 hb_icu_get_general_category (hb_unicode_funcs_t *ufuncs HB_UNUSED,
  95                              hb_codepoint_t      unicode,
  96                              void               *user_data HB_UNUSED)
  97 {
  98   switch (u_getIntPropertyValue(unicode, UCHAR_GENERAL_CATEGORY))
  99   {
 100   case U_UNASSIGNED:                    return HB_UNICODE_GENERAL_CATEGORY_UNASSIGNED;
 101
 102   case U_UPPERCASE_LETTER:              return HB_UNICODE_GENERAL_CATEGORY_UPPERCASE_LETTER;
 103   case U_LOWERCASE_LETTER:              return HB_UNICODE_GENERAL_CATEGORY_LOWERCASE_LETTER;
 104   case U_TITLECASE_LETTER:              return HB_UNICODE_GENERAL_CATEGORY_TITLECASE_LETTER;
 105   case U_MODIFIER_LETTER:               return HB_UNICODE_GENERAL_CATEGORY_MODIFIER_LETTER;
 106   case U_OTHER_LETTER:                  return HB_UNICODE_GENERAL_CATEGORY_OTHER_LETTER;
 107
 108   case U_NON_SPACING_MARK:              return HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK;
 109   case U_ENCLOSING_MARK:                return HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK;
 110   case U_COMBINING_SPACING_MARK:        return HB_UNICODE_GENERAL_CATEGORY_COMBINING_MARK;
 111
 112   case U_DECIMAL_DIGIT_NUMBER:          return HB_UNICODE_GENERAL_CATEGORY_DECIMAL_NUMBER;
 113   case U_LETTER_NUMBER:                 return HB_UNICODE_GENERAL_CATEGORY_LETTER_NUMBER;
 114   case U_OTHER_NUMBER:                  return HB_UNICODE_GENERAL_CATEGORY_OTHER_NUMBER;
 115
 116   case U_SPACE_SEPARATOR:               return HB_UNICODE_GENERAL_CATEGORY_SPACE_SEPARATOR;
 117   case U_LINE_SEPARATOR:                return HB_UNICODE_GENERAL_CATEGORY_LINE_SEPARATOR;
 118   case U_PARAGRAPH_SEPARATOR:           return HB_UNICODE_GENERAL_CATEGORY_PARAGRAPH_SEPARATOR;
 119
 120   case U_CONTROL_CHAR:                  return HB_UNICODE_GENERAL_CATEGORY_CONTROL;
 121   case U_FORMAT_CHAR:                   return HB_UNICODE_GENERAL_CATEGORY_FORMAT;
 122   case U_PRIVATE_USE_CHAR:              return HB_UNICODE_GENERAL_CATEGORY_PRIVATE_USE;
 123   case U_SURROGATE:                     return HB_UNICODE_GENERAL_CATEGORY_SURROGATE;
 124
 125
 126   case U_DASH_PUNCTUATION:              return HB_UNICODE_GENERAL_CATEGORY_DASH_PUNCTUATION;
 127   case U_START_PUNCTUATION:             return HB_UNICODE_GENERAL_CATEGORY_OPEN_PUNCTUATION;
 128   case U_END_PUNCTUATION:               return HB_UNICODE_GENERAL_CATEGORY_CLOSE_PUNCTUATION;
 129   case U_CONNECTOR_PUNCTUATION:         return HB_UNICODE_GENERAL_CATEGORY_CONNECT_PUNCTUATION;
 130   case U_OTHER_PUNCTUATION:             return HB_UNICODE_GENERAL_CATEGORY_OTHER_PUNCTUATION;
 131
 132   case U_MATH_SYMBOL:                   return HB_UNICODE_GENERAL_CATEGORY_MATH_SYMBOL;
 133   case U_CURRENCY_SYMBOL:               return HB_UNICODE_GENERAL_CATEGORY_CURRENCY_SYMBOL;
 134   case U_MODIFIER_SYMBOL:               return HB_UNICODE_GENERAL_CATEGORY_MODIFIER_SYMBOL;
 135   case U_OTHER_SYMBOL:                  return HB_UNICODE_GENERAL_CATEGORY_OTHER_SYMBOL;
 136
 137   case U_INITIAL_PUNCTUATION:           return HB_UNICODE_GENERAL_CATEGORY_INITIAL_PUNCTUATION;
 138   case U_FINAL_PUNCTUATION:             return HB_UNICODE_GENERAL_CATEGORY_FINAL_PUNCTUATION;
 139   }
 140
 141   return HB_UNICODE_GENERAL_CATEGORY_UNASSIGNED;
 142 }
 143
 144 static hb_codepoint_t
 145 hb_icu_get_mirroring (hb_unicode_funcs_t *ufuncs HB_UNUSED,
 146                       hb_codepoint_t      unicode,
 147                       void               *user_data HB_UNUSED)
 148 {
 149   return u_charMirror(unicode);
 150 }
 151
 152 static hb_script_t
 153 hb_icu_get_script (hb_unicode_funcs_t *ufuncs HB_UNUSED,
 154                    hb_codepoint_t      unicode,
 155                    void               *user_data HB_UNUSED)
 156 {
 157   UErrorCode status = U_ZERO_ERROR;
 158   UScriptCode scriptCode = uscript_getScript(unicode, &status);
 159
 160   if (unlikely (status != U_ZERO_ERROR))
 161     return HB_SCRIPT_UNKNOWN;
 162
 163   return hb_icu_script_to_script (scriptCode);
 164 }
 165
 166 extern HB_INTERNAL hb_unicode_funcs_t _hb_unicode_funcs_icu;
 167 hb_unicode_funcs_t _hb_icu_unicode_funcs = {
 168   HB_OBJECT_HEADER_STATIC,
 169
 170   NULL, /* parent */
 171   TRUE, /* immutable */
 172   {
 173     hb_icu_get_combining_class,
 174     hb_icu_get_eastasian_width,
 175     hb_icu_get_general_category,
 176     hb_icu_get_mirroring,
 177     hb_icu_get_script
 178   }
 179 };
 180
 181 hb_unicode_funcs_t *
 182 hb_icu_get_unicode_funcs (void)
 183 {
 184   return &_hb_icu_unicode_funcs;
 185 }
 186
 187
 188 HB_END_DECLS