Added support for languages that are written right-to-left

CONTRIBUTORS

@@ -2621,3 +2621,7 @@ Stefan Huskamp <coca_cola1@gmx.de>
 
 Cristiano A. Silva <arquithek@gmail.com>
  for updating the Portuguese language texts
+
+Osama Alrawab <alrawab@hotmail.com>
+ for adding support for languages that are written right-to-left
+ for translating OSD texts to the Arabian language

HISTORY

@@ -6465,12 +6465,11 @@ Video Disk Recorder Revision History
   the number keys can be used to enter characters in a text input field (suggested
   by Stefan Huskamp).
 
-2010-08-29: Version 1.7.16
+2010-09-19: Version 1.7.16
 
 - Updated the Italian OSD texts (thanks to Diego Pierotto).
 - Added missing Dtypes for ATSC (thanks to Alex Lasnier).
-- Updated the Portuguese language texts (thanks to Cristiano A.
+- Updated the Portuguese language texts (thanks to Cristiano A. Silva).
-  Silva).
 - Updated the Finnish OSD texts (thanks to Rolf Ahrenberg).
 - Fixed the array size of Atypes in cPatFilter::Process() (thanks to
   Rolf Ahrenberg).
@@ -6478,3 +6477,6 @@ Video Disk Recorder Revision History
   is called from a plugin (reported by Andreas Mair).
 - Fixed DDS detection for HD resolution subtitles (thanks to Reinhard Nissl).
 - Fixed following symbolic links in RemoveFileOrDir().
+- Added support for languages that are written right-to-left (based on a patch
+  from Osama Alrawab). See INSTALL for information on how to turn this on.
+- Added Arabian language texts (thanks to Osama Alrawab).

INSTALL

@@ -23,6 +23,7 @@ You will also need to install the following libraries, as well as their
 
   fontconfig
   freetype2
+  fribidi (see "BiDi support" below)
   gettext
   libcap
   libjpeg
@@ -111,6 +112,16 @@ in English.
 Note that for VDR's internationalized texts to work, the LANG environment
 variable must be set to a valid locale!
 
+BiDi support
+------------
+
+Some languages are written right-to-left. In order to display such languages
+correctly, you need to build VDR with BIDI=1. This will link to the "fribidi"
+library and implement a function that prepares bidirectional texts to be
+displayed correctly. Since BiDi support adds some runtime overhead by requiring
+additional memory allocation and copying, this feature is not compiled in
+by default, so that users that have no need for this don't get any overhead.
+
 Workaround for providers not encoding their EPG data correctly
 --------------------------------------------------------------
 

Makefile

@@ -4,7 +4,7 @@
 # See the main source file 'vdr.c' for copyright information and
 # how to reach the author.
 #
-# $Id: Makefile 2.9 2010/04/10 12:40:15 kls Exp $
+# $Id: Makefile 2.10 2010/09/17 13:28:50 kls Exp $
 
 .DELETE_ON_ERROR:
 
@@ -53,6 +53,11 @@ endif
 ifdef VDR_USER
 DEFINES += -DVDR_USER=\"$(VDR_USER)\"
 endif
+ifdef BIDI
+INCLUDES += -I/usr/include/fribidi
+DEFINES += -DBIDI
+LIBS += -lfribidi
+endif
 
 LIRC_DEVICE ?= /dev/lircd
 RCU_DEVICE  ?= /dev/ttyS1

config.h

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: config.h 2.27 2010/06/06 09:53:02 kls Exp $
+ * $Id: config.h 2.28 2010/09/12 11:31:21 kls Exp $
  */
 
 #ifndef __CONFIG_H
@@ -22,13 +22,13 @@
 
 // VDR's own version number:
 
-#define VDRVERSION  "1.7.15"
+#define VDRVERSION  "1.7.16"
-#define VDRVERSNUM   10715  // Version * 10000 + Major * 100 + Minor
+#define VDRVERSNUM   10716  // Version * 10000 + Major * 100 + Minor
 
 // The plugin API's version number:
 
-#define APIVERSION  "1.7.15"
+#define APIVERSION  "1.7.16"
-#define APIVERSNUM   10715  // Version * 10000 + Major * 100 + Minor
+#define APIVERSNUM   10716  // Version * 10000 + Major * 100 + Minor
 
 // When loading plugins, VDR searches them by their APIVERSION, which
 // may be smaller than VDRVERSION in case there have been no changes to

font.c

@@ -4,12 +4,17 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: font.c 2.4 2009/12/31 14:49:59 kls Exp $
+ * BiDi support by Osama Alrawab <alrawab@hotmail.com> @2008 Tripoli-Libya.
+ *
+ * $Id: font.c 2.5 2010/09/19 11:49:19 kls Exp $
  */
 
 #include "font.h"
 #include <ctype.h>
 #include <fontconfig/fontconfig.h>
+#ifdef BIDI
+#include <fribidi.h>
+#endif
 #include <ft2build.h>
 #include FT_FREETYPE_H
 #include "config.h"
@@ -240,6 +245,10 @@ int cFreetypeFont::Width(const char *s) const
 {
   int w = 0;
   if (s) {
+#ifdef BIDI
+     cString bs = Bidi(s);
+     s = bs;
+#endif
      uint prevSym = 0;
      while (*s) {
            int sl = Utf8CharLen(s);
@@ -259,6 +268,10 @@ int cFreetypeFont::Width(const char *s) const
 void cFreetypeFont::DrawText(cBitmap *Bitmap, int x, int y, const char *s, tColor ColorFg, tColor ColorBg, int Width) const
 {
   if (s && height) { // checking height to make sure we actually have a valid font
+#ifdef BIDI
+     cString bs = Bidi(s);
+     s = bs;
+#endif
      bool AntiAliased = Setup.AntiAlias && Bitmap->Bpp() >= 8;
      bool TransparentBackground = ColorBg == clrTransparent;
      int16_t BlendLevelIndex[MAX_BLEND_LEVELS]; // tIndex is 8 bit unsigned, so a negative value can be used to mark unused entries
@@ -443,6 +456,32 @@ cString cFont::GetFontFileName(const char *FontName)
   return FontFileName;
 }
 
+#ifdef BIDI
+cString cFont::Bidi(const char *Ltr)
+{
+  fribidi_set_mirroring(true);
+  fribidi_set_reorder_nsm(false);
+  FriBidiCharSet fribidiCharset = FRIBIDI_CHAR_SET_UTF8;
+  int LtrLen = strlen(Ltr);
+  FriBidiCharType Base = FRIBIDI_TYPE_L;
+  FriBidiChar *Logical = MALLOC(FriBidiChar, LtrLen + 1) ;
+  int RtlLen = fribidi_charset_to_unicode(fribidiCharset, const_cast<char *>(Ltr), LtrLen, Logical);
+  FriBidiChar *Visual = MALLOC(FriBidiChar, LtrLen + 1) ;
+  char *Rtl = NULL;
+  bool ok = fribidi_log2vis(Logical, RtlLen, &Base, Visual, NULL, NULL, NULL);
+  if (ok) {
+     fribidi_remove_bidi_marks(Visual, RtlLen, NULL, NULL, NULL);
+     Rtl = MALLOC(char, RtlLen * 4);
+     fribidi_unicode_to_charset(fribidiCharset, Visual, RtlLen, Rtl);
+     }
+  free(Logical);
+  free(Visual);
+  if (ok)
+     return cString(Rtl, true);
+  return cString(Ltr);
+}
+#endif
+
 // --- cTextWrapper ----------------------------------------------------------
 
 cTextWrapper::cTextWrapper(void)

font.h

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: font.h 2.3 2009/12/31 14:48:25 kls Exp $
+ * $Id: font.h 2.4 2010/09/19 11:48:37 kls Exp $
  */
 
 #ifndef __FONT_H
@@ -82,6 +82,11 @@ public:
           ///< Returns true if any font names were found.
   static cString GetFontFileName(const char *FontName);
           ///< Retruns the actual font file name for the given FontName.
+#ifdef BIDI
+  static cString Bidi(const char *Ltr);
+          ///< Converts any "right-to-left" parts in the "left-to-right" string Ltr
+          ///< to the proper language specific representation and returns the resulting string.
+#endif
   };
 
 class cTextWrapper {

i18n.c

@@ -4,9 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: i18n.c 2.1 2008/09/06 12:24:43 kls Exp $
+ * $Id: i18n.c 2.2 2010/09/19 11:22:39 kls Exp $
- *
- *
  */
 
 /*
@@ -60,6 +58,7 @@ const char *LanguageCodeList[] = {
   "cze,ces",
   "tur",
   "ukr",
+  "ara",
   NULL
   };