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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.hh"
-
-#ifdef HAVE_GLIB
-
-#include "hb-glib.h"
-
-#include "hb-machinery.hh"
-
-
-/**
- * SECTION:hb-glib
- * @title: hb-glib
- * @short_description: GLib integration
- * @include: hb-glib.h
- *
- * Functions for using HarfBuzz with the GLib library.
- *
- * HarfBuzz supports using GLib to provide Unicode data, by attaching
- * GLib functions to the virtual methods in a #hb_unicode_funcs_t function
- * structure.
- **/
-
-
-/**
- * hb_glib_script_to_script:
- * @script: The GUnicodeScript identifier to query
- *
- * Fetches the #hb_script_t script that corresponds to the
- * specified GUnicodeScript identifier.
- *
- * Return value: the #hb_script_t script found
- *
- * Since: 0.9.38
- **/
-hb_script_t
-hb_glib_script_to_script (GUnicodeScript script)
-{
- return (hb_script_t) g_unicode_script_to_iso15924 (script);
-}
-
-/**
- * hb_glib_script_from_script:
- * @script: The #hb_script_t to query
- *
- * Fetches the GUnicodeScript identifier that corresponds to the
- * specified #hb_script_t script.
- *
- * Return value: the GUnicodeScript identifier found
- *
- * Since: 0.9.38
- **/
-GUnicodeScript
-hb_glib_script_from_script (hb_script_t script)
-{
- return g_unicode_script_from_iso15924 (script);
-}
-
-
-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 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;
-}
-
-
-#if HB_USE_ATEXIT
-static void free_static_glib_funcs ();
-#endif
-
-static struct hb_glib_unicode_funcs_lazy_loader_t : hb_unicode_funcs_lazy_loader_t<hb_glib_unicode_funcs_lazy_loader_t>
-{
- static hb_unicode_funcs_t *create ()
- {
- hb_unicode_funcs_t *funcs = hb_unicode_funcs_create (nullptr);
-
- hb_unicode_funcs_set_combining_class_func (funcs, hb_glib_unicode_combining_class, nullptr, nullptr);
- hb_unicode_funcs_set_general_category_func (funcs, hb_glib_unicode_general_category, nullptr, nullptr);
- hb_unicode_funcs_set_mirroring_func (funcs, hb_glib_unicode_mirroring, nullptr, nullptr);
- hb_unicode_funcs_set_script_func (funcs, hb_glib_unicode_script, nullptr, nullptr);
- hb_unicode_funcs_set_compose_func (funcs, hb_glib_unicode_compose, nullptr, nullptr);
- hb_unicode_funcs_set_decompose_func (funcs, hb_glib_unicode_decompose, nullptr, nullptr);
-
- hb_unicode_funcs_make_immutable (funcs);
-
-#if HB_USE_ATEXIT
- atexit (free_static_glib_funcs);
-#endif
-
- return funcs;
- }
-} static_glib_funcs;
-
-#if HB_USE_ATEXIT
-static
-void free_static_glib_funcs ()
-{
- static_glib_funcs.free_instance ();
-}
-#endif
-
-/**
- * hb_glib_get_unicode_funcs:
- *
- * Fetches a Unicode-functions structure that is populated
- * with the appropriate GLib function for each method.
- *
- * Return value: (transfer none): a pointer to the #hb_unicode_funcs_t Unicode-functions structure
- *
- * Since: 0.9.38
- **/
-hb_unicode_funcs_t *
-hb_glib_get_unicode_funcs ()
-{
- return 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:
- * @gbytes: the GBytes structure to work upon
- *
- * Creates an #hb_blob_t blob from the specified
- * GBytes data structure.
- *
- * Return value: (transfer full): the new #hb_blob_t blob object
- *
- * 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
-
-
-#endif