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+/*
+ * 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_unicode_funcs_t *> (&_hb_glib_unicode_funcs);
+}
+
+#if GLIB_CHECK_VERSION(2,31,10)
+/**
+ * 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_destroy_func_t) g_bytes_unref);
+}
+#endif