From a82890fffcb113f48fee854e5fc38aca9ec39158 Mon Sep 17 00:00:00 2001
From: Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>
Date: Mon, 29 Mar 2010 03:37:24 +0200
Subject: [PATCH] Shape arabic code when on UTF-8 visual

---
 include/grub/unicode.h |  2 ++
 normal/charset.c       | 36 ++++++++++++++++++++++++++++++++++++
 normal/term.c          |  9 ++++++---
 3 files changed, 44 insertions(+), 3 deletions(-)

diff --git a/include/grub/unicode.h b/include/grub/unicode.h
index 9fde69cc8..a779e2c9c 100644
--- a/include/grub/unicode.h
+++ b/include/grub/unicode.h
@@ -222,5 +222,7 @@ grub_unicode_glyph_from_code (grub_uint32_t code)
 
 grub_uint32_t
 grub_unicode_mirror_code (grub_uint32_t in);
+grub_uint32_t
+grub_unicode_shape_code (grub_uint32_t in, grub_uint8_t attr);
 
 #endif
diff --git a/normal/charset.c b/normal/charset.c
index 55a9894a9..6f09fac90 100644
--- a/normal/charset.c
+++ b/normal/charset.c
@@ -1227,3 +1227,39 @@ grub_unicode_mirror_code (grub_uint32_t in)
       return grub_unicode_bidi_pairs[i].replace;
   return in;
 }
+
+grub_uint32_t
+grub_unicode_shape_code (grub_uint32_t in, grub_uint8_t attr)
+{
+  int i;
+  if (!(in >= GRUB_UNICODE_ARABIC_START
+	&& in < GRUB_UNICODE_ARABIC_END))
+    return in;
+
+  for (i = 0; grub_unicode_arabic_shapes[i].code; i++)
+    if (grub_unicode_arabic_shapes[i].code == in)
+      {
+	grub_uint32_t out;
+	switch (attr & (GRUB_UNICODE_GLYPH_ATTRIBUTE_RIGHT_JOINED
+			| GRUB_UNICODE_GLYPH_ATTRIBUTE_LEFT_JOINED))
+	  {
+	  case 0:
+	    out = grub_unicode_arabic_shapes[i].isolated;
+	    break;
+	  case GRUB_UNICODE_GLYPH_ATTRIBUTE_RIGHT_JOINED:
+	    out = grub_unicode_arabic_shapes[i].right_linked;
+	    break;
+	  case GRUB_UNICODE_GLYPH_ATTRIBUTE_LEFT_JOINED:
+	    out = grub_unicode_arabic_shapes[i].left_linked;
+	    break;
+	  case GRUB_UNICODE_GLYPH_ATTRIBUTE_RIGHT_JOINED
+	    |GRUB_UNICODE_GLYPH_ATTRIBUTE_LEFT_JOINED:
+	    out = grub_unicode_arabic_shapes[i].both_linked;
+	    break;
+	  }
+	if (out)
+	  return out;
+      }
+
+  return in;
+}
diff --git a/normal/term.c b/normal/term.c
index 09299f647..4724c5d41 100644
--- a/normal/term.c
+++ b/normal/term.c
@@ -392,9 +392,12 @@ putglyph (const struct grub_unicode_glyph *c, struct grub_term_output *term)
 	    {
 	      code = c->base;
 	      if ((term->flags & GRUB_TERM_CODE_TYPE_MASK)
-		  == GRUB_TERM_CODE_TYPE_UTF8_VISUAL
-		  && (c->attributes & GRUB_UNICODE_GLYPH_ATTRIBUTE_MIRROR))
-		code = grub_unicode_mirror_code (code);
+		  == GRUB_TERM_CODE_TYPE_UTF8_VISUAL)
+		{
+		  if ((c->attributes & GRUB_UNICODE_GLYPH_ATTRIBUTE_MIRROR))
+		    code = grub_unicode_mirror_code (code);
+		  code = grub_unicode_shape_code (code, c->attributes);
+		}
 	    }
 	  else
 	    code = c->combining[i].code;