2 * Copyright © 2009 Red Hat, Inc.
3 * Copyright © 2009 Keith Stribley
4 * Copyright © 2011 Google, Inc.
6 * This is part of HarfBuzz, a text shaping library.
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.
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
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.
26 * Red Hat Author(s): Behdad Esfahbod
27 * Google Author(s): Behdad Esfahbod
30 #include "hb-private.hh"
34 #include "hb-unicode-private.hh"
36 #include <unicode/uversion.h>
37 #include <unicode/uchar.h>
38 #include <unicode/unorm.h>
39 #include <unicode/ustring.h>
44 hb_icu_script_to_script (UScriptCode script)
46 if (unlikely (script == USCRIPT_INVALID_CODE))
47 return HB_SCRIPT_INVALID;
49 return hb_script_from_string (uscript_getShortName (script), -1);
53 hb_icu_script_from_script (hb_script_t script)
55 if (unlikely (script == HB_SCRIPT_INVALID))
56 return USCRIPT_INVALID_CODE;
58 for (unsigned int i = 0; i < USCRIPT_CODE_LIMIT; i++)
59 if (unlikely (hb_icu_script_to_script ((UScriptCode) i) == script))
60 return (UScriptCode) i;
62 return USCRIPT_UNKNOWN;
67 hb_icu_unicode_combining_class (hb_unicode_funcs_t *ufuncs HB_UNUSED,
68 hb_codepoint_t unicode,
69 void *user_data HB_UNUSED)
72 return u_getCombiningClass (unicode);
76 hb_icu_unicode_eastasian_width (hb_unicode_funcs_t *ufuncs HB_UNUSED,
77 hb_codepoint_t unicode,
78 void *user_data HB_UNUSED)
80 switch (u_getIntPropertyValue(unicode, UCHAR_EAST_ASIAN_WIDTH))
94 static hb_unicode_general_category_t
95 hb_icu_unicode_general_category (hb_unicode_funcs_t *ufuncs HB_UNUSED,
96 hb_codepoint_t unicode,
97 void *user_data HB_UNUSED)
99 switch (u_getIntPropertyValue(unicode, UCHAR_GENERAL_CATEGORY))
101 case U_UNASSIGNED: return HB_UNICODE_GENERAL_CATEGORY_UNASSIGNED;
103 case U_UPPERCASE_LETTER: return HB_UNICODE_GENERAL_CATEGORY_UPPERCASE_LETTER;
104 case U_LOWERCASE_LETTER: return HB_UNICODE_GENERAL_CATEGORY_LOWERCASE_LETTER;
105 case U_TITLECASE_LETTER: return HB_UNICODE_GENERAL_CATEGORY_TITLECASE_LETTER;
106 case U_MODIFIER_LETTER: return HB_UNICODE_GENERAL_CATEGORY_MODIFIER_LETTER;
107 case U_OTHER_LETTER: return HB_UNICODE_GENERAL_CATEGORY_OTHER_LETTER;
109 case U_NON_SPACING_MARK: return HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK;
110 case U_ENCLOSING_MARK: return HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK;
111 case U_COMBINING_SPACING_MARK: return HB_UNICODE_GENERAL_CATEGORY_SPACING_MARK;
113 case U_DECIMAL_DIGIT_NUMBER: return HB_UNICODE_GENERAL_CATEGORY_DECIMAL_NUMBER;
114 case U_LETTER_NUMBER: return HB_UNICODE_GENERAL_CATEGORY_LETTER_NUMBER;
115 case U_OTHER_NUMBER: return HB_UNICODE_GENERAL_CATEGORY_OTHER_NUMBER;
117 case U_SPACE_SEPARATOR: return HB_UNICODE_GENERAL_CATEGORY_SPACE_SEPARATOR;
118 case U_LINE_SEPARATOR: return HB_UNICODE_GENERAL_CATEGORY_LINE_SEPARATOR;
119 case U_PARAGRAPH_SEPARATOR: return HB_UNICODE_GENERAL_CATEGORY_PARAGRAPH_SEPARATOR;
121 case U_CONTROL_CHAR: return HB_UNICODE_GENERAL_CATEGORY_CONTROL;
122 case U_FORMAT_CHAR: return HB_UNICODE_GENERAL_CATEGORY_FORMAT;
123 case U_PRIVATE_USE_CHAR: return HB_UNICODE_GENERAL_CATEGORY_PRIVATE_USE;
124 case U_SURROGATE: return HB_UNICODE_GENERAL_CATEGORY_SURROGATE;
127 case U_DASH_PUNCTUATION: return HB_UNICODE_GENERAL_CATEGORY_DASH_PUNCTUATION;
128 case U_START_PUNCTUATION: return HB_UNICODE_GENERAL_CATEGORY_OPEN_PUNCTUATION;
129 case U_END_PUNCTUATION: return HB_UNICODE_GENERAL_CATEGORY_CLOSE_PUNCTUATION;
130 case U_CONNECTOR_PUNCTUATION: return HB_UNICODE_GENERAL_CATEGORY_CONNECT_PUNCTUATION;
131 case U_OTHER_PUNCTUATION: return HB_UNICODE_GENERAL_CATEGORY_OTHER_PUNCTUATION;
133 case U_MATH_SYMBOL: return HB_UNICODE_GENERAL_CATEGORY_MATH_SYMBOL;
134 case U_CURRENCY_SYMBOL: return HB_UNICODE_GENERAL_CATEGORY_CURRENCY_SYMBOL;
135 case U_MODIFIER_SYMBOL: return HB_UNICODE_GENERAL_CATEGORY_MODIFIER_SYMBOL;
136 case U_OTHER_SYMBOL: return HB_UNICODE_GENERAL_CATEGORY_OTHER_SYMBOL;
138 case U_INITIAL_PUNCTUATION: return HB_UNICODE_GENERAL_CATEGORY_INITIAL_PUNCTUATION;
139 case U_FINAL_PUNCTUATION: return HB_UNICODE_GENERAL_CATEGORY_FINAL_PUNCTUATION;
142 return HB_UNICODE_GENERAL_CATEGORY_UNASSIGNED;
145 static hb_codepoint_t
146 hb_icu_unicode_mirroring (hb_unicode_funcs_t *ufuncs HB_UNUSED,
147 hb_codepoint_t unicode,
148 void *user_data HB_UNUSED)
150 return u_charMirror(unicode);
154 hb_icu_unicode_script (hb_unicode_funcs_t *ufuncs HB_UNUSED,
155 hb_codepoint_t unicode,
156 void *user_data HB_UNUSED)
158 UErrorCode status = U_ZERO_ERROR;
159 UScriptCode scriptCode = uscript_getScript(unicode, &status);
161 if (unlikely (U_FAILURE (status)))
162 return HB_SCRIPT_UNKNOWN;
164 return hb_icu_script_to_script (scriptCode);
168 hb_icu_unicode_compose (hb_unicode_funcs_t *ufuncs HB_UNUSED,
172 void *user_data HB_UNUSED)
177 UChar utf16[4], normalized[5];
184 U16_APPEND (utf16, len, ARRAY_LENGTH (utf16), a, err);
185 if (err) return false;
186 U16_APPEND (utf16, len, ARRAY_LENGTH (utf16), b, err);
187 if (err) return false;
189 icu_err = U_ZERO_ERROR;
190 len = unorm_normalize (utf16, len, UNORM_NFC, 0, normalized, ARRAY_LENGTH (normalized), &icu_err);
191 if (U_FAILURE (icu_err))
193 if (u_countChar32 (normalized, len) == 1) {
194 U16_GET_UNSAFE (normalized, 0, *ab);
204 hb_icu_unicode_decompose (hb_unicode_funcs_t *ufuncs HB_UNUSED,
208 void *user_data HB_UNUSED)
210 UChar utf16[2], normalized[20];
215 /* This function is a monster! Maybe it wasn't a good idea adding a
216 * pairwise decompose API... */
217 /* Watchout for the dragons. Err, watchout for macros changing len. */
221 U16_APPEND (utf16, len, ARRAY_LENGTH (utf16), ab, err);
222 if (err) return false;
224 icu_err = U_ZERO_ERROR;
225 len = unorm_normalize (utf16, len, UNORM_NFD, 0, normalized, ARRAY_LENGTH (normalized), &icu_err);
226 if (U_FAILURE (icu_err))
229 len = u_countChar32 (normalized, len);
232 U16_GET_UNSAFE (normalized, 0, *a);
235 } else if (len == 2) {
237 U16_NEXT_UNSAFE (normalized, len, *a);
238 U16_NEXT_UNSAFE (normalized, len, *b);
240 /* Here's the ugly part: if ab decomposes to a single character and
241 * that character decomposes again, we have to detect that and undo
242 * the second part :-(. */
243 UChar recomposed[20];
244 icu_err = U_ZERO_ERROR;
245 unorm_normalize (normalized, len, UNORM_NFC, 0, recomposed, ARRAY_LENGTH (recomposed), &icu_err);
246 if (U_FAILURE (icu_err))
249 U16_GET_UNSAFE (recomposed, 0, c);
250 if (c != *a && c != ab) {
256 /* If decomposed to more than two characters, take the last one,
257 * and recompose the rest to get the first component. */
258 U16_PREV_UNSAFE (normalized, len, *b);
259 UChar recomposed[20];
260 icu_err = U_ZERO_ERROR;
261 len = unorm_normalize (normalized, len, UNORM_NFC, 0, recomposed, ARRAY_LENGTH (recomposed), &icu_err);
262 if (U_FAILURE (icu_err))
264 /* We expect that recomposed has exactly one character now. */
265 U16_GET_UNSAFE (recomposed, 0, *a);
273 extern HB_INTERNAL const hb_unicode_funcs_t _hb_icu_unicode_funcs;
274 const hb_unicode_funcs_t _hb_icu_unicode_funcs = {
275 HB_OBJECT_HEADER_STATIC,
278 true, /* immutable */
280 #define HB_UNICODE_FUNC_IMPLEMENT(name) hb_icu_unicode_##name,
281 HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS
282 #undef HB_UNICODE_FUNC_IMPLEMENT
287 hb_icu_get_unicode_funcs (void)
289 return const_cast<hb_unicode_funcs_t *> (&_hb_icu_unicode_funcs);