434 lines
11 KiB
C++
434 lines
11 KiB
C++
/*
|
|
* 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"
|
|
#include "hb-machinery-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;
|
|
}
|
|
|
|
|
|
|
|
static void free_static_glib_funcs (void);
|
|
|
|
static struct hb_glib_unicode_funcs_lazy_loader_t : hb_unicode_funcs_lazy_loader_t<hb_glib_unicode_funcs_lazy_loader_t>
|
|
{
|
|
static inline hb_unicode_funcs_t *create (void)
|
|
{
|
|
hb_unicode_funcs_t *funcs = hb_unicode_funcs_create (nullptr);
|
|
|
|
#define HB_UNICODE_FUNC_IMPLEMENT(name) \
|
|
hb_unicode_funcs_set_##name##_func (funcs, hb_glib_unicode_##name, nullptr, nullptr);
|
|
HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS
|
|
#undef HB_UNICODE_FUNC_IMPLEMENT
|
|
|
|
hb_unicode_funcs_make_immutable (funcs);
|
|
|
|
#ifdef HB_USE_ATEXIT
|
|
atexit (free_static_glib_funcs);
|
|
#endif
|
|
|
|
return funcs;
|
|
}
|
|
} static_glib_funcs;
|
|
|
|
#ifdef HB_USE_ATEXIT
|
|
static
|
|
void free_static_glib_funcs (void)
|
|
{
|
|
static_glib_funcs.free_instance ();
|
|
}
|
|
#endif
|
|
|
|
hb_unicode_funcs_t *
|
|
hb_glib_get_unicode_funcs (void)
|
|
{
|
|
return hb_unicode_funcs_reference (static_glib_funcs.get_unconst ());
|
|
}
|
|
|
|
|
|
|
|
#if GLIB_CHECK_VERSION(2,31,10)
|
|
|
|
static void
|
|
_hb_g_bytes_unref (void *data)
|
|
{
|
|
g_bytes_unref ((GBytes *) data);
|
|
}
|
|
|
|
/**
|
|
* hb_glib_blob_create:
|
|
*
|
|
* Since: 0.9.38
|
|
**/
|
|
hb_blob_t *
|
|
hb_glib_blob_create (GBytes *gbytes)
|
|
{
|
|
gsize size = 0;
|
|
gconstpointer data = g_bytes_get_data (gbytes, &size);
|
|
return hb_blob_create ((const char *) data,
|
|
size,
|
|
HB_MEMORY_MODE_READONLY,
|
|
g_bytes_ref (gbytes),
|
|
_hb_g_bytes_unref);
|
|
}
|
|
#endif
|