[pango/wip/khaled/fribidi: 4/4] Use the new FriBiDi API when available

[Khaled Hosny <khaledh src gnome org>]

commit 4de23e02148e27cd50c0286bdfa6b8d6ec7549fa
Author: Khaled Hosny <khaledhosny eglug org>
Date:   Tue Nov 14 15:55:14 2017 +0200

    Use the new FriBiDi API when available

 pango/pango-bidi-type.c |   22 ++++++++++++++++++++++
 1 files changed, 22 insertions(+), 0 deletions(-)
---
diff --git a/pango/pango-bidi-type.c b/pango/pango-bidi-type.c
index b68f0d4..0ec0366 100644
--- a/pango/pango-bidi-type.c
+++ b/pango/pango-bidi-type.c
@@ -46,6 +46,9 @@
 #include "pango-bidi-type.h"
 #include "pango-utils.h"
 
+#if (FRIBIDI_MINOR_VERSION >= 19) && (FRIBIDI_MICRO_VERSION > 7)
+#define USE_FRIBIDI_EX_API
+#endif
 
 /**
  * pango_bidi_type_for_unichar:
@@ -126,6 +129,9 @@ pango_log2vis_get_embedding_levels (const gchar    *text,
   const gchar *p;
   FriBidiParType fribidi_base_dir;
   FriBidiCharType *types;
+#ifdef USE_FRIBIDI_EX_API
+  FriBidiBracketType *brackets;
+#endif
   FriBidiLevel max_level;
 
 
@@ -155,17 +161,33 @@ pango_log2vis_get_embedding_levels (const gchar    *text,
   n_chars = g_utf8_strlen (text, length);
 
   types = g_new (FriBidiCharType, n_chars);
+#ifdef USE_FRIBIDI_EX_API
+  brackets = g_new (FriBidiBracketType, n_chars);
+#endif
   embedding_levels_list = g_new (guint8, n_chars);
 
   for (i = 0, p = text; p < text + length; p = g_utf8_next_char(p), i++)
     {
       gunichar ch = g_utf8_get_char (p);
       types[i] = fribidi_get_bidi_type (ch);
+#ifdef USE_FRIBIDI_EX_API
+      if (G_UNLIKELY(types[i] == FRIBIDI_TYPE_ON))
+        brackets[i] = fribidi_get_bracket (ch);
+      else
+        brackets[i] = FRIBIDI_NO_BRACKET;
+#endif
     }
 
+#ifdef USE_FRIBIDI_EX_API
+  max_level = fribidi_get_par_embedding_levels_ex (types, brackets, n_chars,
+                                                  &fribidi_base_dir,
+                                                  (FriBidiLevel*)embedding_levels_list);
+  g_free (brackets);
+#else
   max_level = fribidi_get_par_embedding_levels (types, n_chars,
                                                &fribidi_base_dir,
                                                (FriBidiLevel*)embedding_levels_list);
+#endif
 
   g_free (types);