Add PangoFcLanguageSet

This is an implementation of PangoLanguageSet
that is wrapping FcLangSet.

3 files changed, 173 insertions, 0 deletions

diff --git a/pango/meson.build b/pango/meson.build
index 13bb3a12..e2117842 100644
--- a/pango/meson.build
+++ b/pango/meson.build
@@ -214,6 +214,7 @@ if build_pangoft2
   pangofc_public_sources = [
     'pangofc-font.c',
     'pangofc-fontmap.c',
+    'pangofc-language-set.c',
     'pangofc-decoder.c',
     'pango-trace.c',
   ]
diff --git a/pango/pangofc-language-set-private.h b/pango/pangofc-language-set-private.h
new file mode 100644
index 00000000..7a957d82
--- /dev/null
+++ b/pango/pangofc-language-set-private.h
@@ -0,0 +1,30 @@
+#pragma once
+
+#include "pango-language-set-private.h"
+#include <fontconfig/fontconfig.h>
+
+G_BEGIN_DECLS
+
+#define PANGO_TYPE_FC_LANGUAGE_SET (pango_fc_language_set_get_type ())
+
+G_DECLARE_FINAL_TYPE (PangoFcLanguageSet, pango_fc_language_set, PANGO, FC_LANGUAGE_SET, PangoLanguageSet)
+
+struct _PangoFcLanguageSet
+{
+  PangoLanguageSet parent_instance;
+
+  FcLangSet *langs;
+};
+
+struct _PangoFcLanguageSetClass
+{
+  PangoLanguageSetClass parent_class;
+};
+
+PangoFcLanguageSet *    pango_fc_language_set_new       (FcLangSet                      *langs);
+
+guint                   pango_fc_language_set_hash      (const PangoFcLanguageSet       *self);
+gboolean                pango_fc_language_set_equal     (const PangoFcLanguageSet       *a,
+                                                         const PangoFcLanguageSet       *b);
+
+G_END_DECLS
diff --git a/pango/pangofc-language-set.c b/pango/pangofc-language-set.c
new file mode 100644
index 00000000..56a32e20
--- /dev/null
+++ b/pango/pangofc-language-set.c
@@ -0,0 +1,142 @@
+/* Pango
+ *
+ * Copyright (C) 2021 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "config.h"
+
+#include "pangofc-language-set-private.h"
+
+
+G_DEFINE_TYPE (PangoFcLanguageSet, pango_fc_language_set, PANGO_TYPE_LANGUAGE_SET)
+
+static void
+pango_fc_language_set_init (PangoFcLanguageSet *self)
+{
+}
+
+static void
+pango_fc_language_set_finalize (GObject *object)
+{
+  PangoFcLanguageSet *self = PANGO_FC_LANGUAGE_SET (object);
+
+  FcLangSetDestroy (self->langs);
+
+  G_OBJECT_CLASS (pango_fc_language_set_parent_class)->finalize (object);
+}
+
+static gboolean
+pango_fc_language_set_matches_language (PangoLanguageSet *set,
+                                        PangoLanguage    *language)
+{
+  PangoFcLanguageSet *self = PANGO_FC_LANGUAGE_SET (set);
+  const char *s;
+
+  if (language == pango_language_from_string ("c"))
+    return TRUE;
+
+  if (FcLangSetHasLang (self->langs, (FcChar8 *) pango_language_to_string (language)) != FcLangDifferentLang)
+    return TRUE;
+
+  s = pango_language_to_string (language);
+  if (strchr (s, '-'))
+    {
+      char buf[10];
+
+      for (int i = 0; i < 10; i++)
+        {
+          buf[i] = s[i];
+          if (buf[i] == '-')
+            {
+              buf[i] = '\0';
+              break;
+            }
+        }
+      buf[9] = '\0';
+
+      if (FcLangSetHasLang (self->langs, (FcChar8 *) buf) != FcLangDifferentLang)
+        return TRUE;
+    }
+
+  return FALSE;
+}
+
+static PangoLanguage **
+pango_fc_language_set_get_languages (PangoLanguageSet *set)
+{
+  PangoFcLanguageSet *self = PANGO_FC_LANGUAGE_SET (set);
+  FcStrSet *strset;
+  FcStrList *list;
+  FcChar8 *s;
+  GPtrArray *langs;
+
+  langs = g_ptr_array_new ();
+
+  strset = FcLangSetGetLangs (self->langs);
+  list = FcStrListCreate (strset);
+
+  FcStrListFirst (list);
+  while ((s = FcStrListNext (list)))
+    g_ptr_array_add (langs, pango_language_from_string ((const char *)s));
+
+  FcStrListDone (list);
+  FcStrSetDestroy (strset);
+
+  g_ptr_array_add (langs, NULL);
+
+  return (PangoLanguage **) g_ptr_array_free (langs, FALSE);
+}
+
+static void
+pango_fc_language_set_class_init (PangoFcLanguageSetClass *class)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (class);
+  PangoLanguageSetClass *language_set_class = PANGO_LANGUAGE_SET_CLASS (class);
+
+  object_class->finalize = pango_fc_language_set_finalize;
+
+  language_set_class->matches_language = pango_fc_language_set_matches_language;
+  language_set_class->get_languages = pango_fc_language_set_get_languages;
+}
+
+PangoFcLanguageSet *
+pango_fc_language_set_new (FcLangSet *langs)
+{
+  PangoFcLanguageSet *self;
+
+  self = g_object_new (PANGO_TYPE_FC_LANGUAGE_SET, NULL);
+
+  self->langs = FcLangSetCopy (langs);
+
+  return self;
+}
+
+guint
+pango_fc_language_set_hash (const PangoFcLanguageSet *self)
+{
+  return (guint) FcLangSetHash (self->langs);
+}
+
+gboolean
+pango_fc_language_set_equal (const PangoFcLanguageSet *a,
+                             const PangoFcLanguageSet *b)
+{
+  return FcLangSetEqual (a->langs, b->langs);
+}
+
+/* vim:set foldmethod=marker expandtab: */