/* * 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" #if !GLIB_CHECK_VERSION(2,29,14) 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_SYLLABICS, 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, /* Unicode-6.1 additions */ HB_SCRIPT_CHAKMA, HB_SCRIPT_MEROITIC_CURSIVE, HB_SCRIPT_MEROITIC_HIEROGLYPHS, HB_SCRIPT_MIAO, HB_SCRIPT_SHARADA, HB_SCRIPT_SORA_SOMPENG, HB_SCRIPT_TAKRI }; #endif hb_script_t hb_glib_script_to_script (GUnicodeScript script) { #if GLIB_CHECK_VERSION(2,29,14) return (hb_script_t) g_unicode_script_to_iso15924 (script); #else 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; #endif } GUnicodeScript hb_glib_script_from_script (hb_script_t script) { #if GLIB_CHECK_VERSION(2,29,14) return g_unicode_script_from_iso15924 (script); #else 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; #endif } static hb_unicode_combining_class_t hb_glib_unicode_combining_class (hb_unicode_funcs_t *ufuncs HB_UNUSED, hb_codepoint_t unicode, void *user_data HB_UNUSED) { return (hb_unicode_combining_class_t) g_unichar_combining_class (unicode); } static unsigned int hb_glib_unicode_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_unicode_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_unicode_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_unicode_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)); } static hb_bool_t hb_glib_unicode_compose (hb_unicode_funcs_t *ufuncs HB_UNUSED, hb_codepoint_t a, hb_codepoint_t b, hb_codepoint_t *ab, void *user_data HB_UNUSED) { #if GLIB_CHECK_VERSION(2,29,12) return g_unichar_compose (a, b, ab); #endif /* We don't ifdef-out the fallback code such that compiler always * sees it and makes sure it's compilable. */ gchar utf8[12]; gchar *normalized; int len; hb_bool_t ret; len = g_unichar_to_utf8 (a, utf8); len += g_unichar_to_utf8 (b, utf8 + len); normalized = g_utf8_normalize (utf8, len, G_NORMALIZE_NFC); len = g_utf8_strlen (normalized, -1); if (unlikely (!len)) return false; if (len == 1) { *ab = g_utf8_get_char (normalized); ret = true; } else { ret = false; } g_free (normalized); return ret; } static hb_bool_t hb_glib_unicode_decompose (hb_unicode_funcs_t *ufuncs HB_UNUSED, hb_codepoint_t ab, hb_codepoint_t *a, hb_codepoint_t *b, void *user_data HB_UNUSED) { #if GLIB_CHECK_VERSION(2,29,12) return g_unichar_decompose (ab, a, b); #endif /* We don't ifdef-out the fallback code such that compiler always * sees it and makes sure it's compilable. */ gchar utf8[6]; gchar *normalized; int len; hb_bool_t ret; len = g_unichar_to_utf8 (ab, utf8); normalized = g_utf8_normalize (utf8, len, G_NORMALIZE_NFD); len = g_utf8_strlen (normalized, -1); if (unlikely (!len)) return false; if (len == 1) { *a = g_utf8_get_char (normalized); *b = 0; ret = *a != ab; } else if (len == 2) { *a = g_utf8_get_char (normalized); *b = g_utf8_get_char (g_utf8_next_char (normalized)); /* Here's the ugly part: if ab decomposes to a single character and * that character decomposes again, we have to detect that and undo * the second part :-(. */ gchar *recomposed = g_utf8_normalize (normalized, -1, G_NORMALIZE_NFC); hb_codepoint_t c = g_utf8_get_char (recomposed); if (c != ab && c != *a) { *a = c; *b = 0; } g_free (recomposed); ret = true; } else { /* If decomposed to more than two characters, take the last one, * and recompose the rest to get the first component. */ gchar *end = g_utf8_offset_to_pointer (normalized, len - 1); gchar *recomposed; *b = g_utf8_get_char (end); recomposed = g_utf8_normalize (normalized, end - normalized, G_NORMALIZE_NFC); /* We expect that recomposed has exactly one character now. */ *a = g_utf8_get_char (recomposed); g_free (recomposed); ret = true; } g_free (normalized); return ret; } static unsigned int hb_glib_unicode_decompose_compatibility (hb_unicode_funcs_t *ufuncs HB_UNUSED, hb_codepoint_t u, hb_codepoint_t *decomposed, void *user_data HB_UNUSED) { #if GLIB_CHECK_VERSION(2,29,12) return g_unichar_fully_decompose (u, TRUE, decomposed, HB_UNICODE_MAX_DECOMPOSITION_LEN); #endif /* If the user doesn't have GLib >= 2.29.12 we have to perform * a round trip to UTF-8 and the associated memory management dance. */ gchar utf8[6]; gchar *utf8_decomposed, *c; gsize utf8_len, utf8_decomposed_len, i; /* Convert @u to UTF-8 and normalise it in NFKD mode. This performs the compatibility decomposition. */ utf8_len = g_unichar_to_utf8 (u, utf8); utf8_decomposed = g_utf8_normalize (utf8, utf8_len, G_NORMALIZE_NFKD); utf8_decomposed_len = g_utf8_strlen (utf8_decomposed, -1); assert (utf8_decomposed_len <= HB_UNICODE_MAX_DECOMPOSITION_LEN); for (i = 0, c = utf8_decomposed; i < utf8_decomposed_len; i++, c = g_utf8_next_char (c)) *decomposed++ = g_utf8_get_char (c); g_free (utf8_decomposed); return utf8_decomposed_len; } hb_unicode_funcs_t * hb_glib_get_unicode_funcs (void) { static const hb_unicode_funcs_t _hb_glib_unicode_funcs = { HB_OBJECT_HEADER_STATIC, NULL, /* parent */ true, /* immutable */ { #define HB_UNICODE_FUNC_IMPLEMENT(name) hb_glib_unicode_##name, HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS #undef HB_UNICODE_FUNC_IMPLEMENT } }; return const_cast (&_hb_glib_unicode_funcs); }