add unicode to langbox arabic font encoding converter incomplete

intl/uconv/ucvlatin/nsUnicodeToLangBoxArabic8.cpp

@@ -0,0 +1,184 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.0 (the "License"); you may not use this file except in
+ * compliance with the License.  You may obtain a copy of the License at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * The Original Code is Mozilla Communicator client code.
+ *
+ * The Initial Developer of the Original Code is Netscape Communications
+ * Corporation.  Portions created by Netscape are Copyright (C) 1998
+ * Netscape Communications Corporation.  All Rights Reserved.
+ */
+
+
+#include "nsUnicodeToLangBoxArabic8.h"
+
+#include "nsUCvLatinSupport.h"
+
+//----------------------------------------------------------------------
+// Class nsUnicodeToLangBoxArabic8 [declaration]
+
+class nsUnicodeToLangBoxArabic8 : public nsBasicEncoder
+{
+
+public:
+
+  /**
+   * Class constructor.
+   */
+  nsUnicodeToLangBoxArabic8() {};
+  virtual ~nsUnicodeToLangBoxArabic8() {};
+
+  NS_IMETHOD Convert(
+      const PRUnichar * aSrc, PRInt32 * aSrcLength,
+      char * aDest, PRInt32 * aDestLength);
+
+  NS_IMETHOD Finish(
+      char * aDest, PRInt32 * aDestLength);
+
+  NS_IMETHOD GetMaxLength(
+      const PRUnichar * aSrc, PRInt32 aSrcLength,
+      PRInt32 * aDestLength);
+
+  NS_IMETHOD Reset();
+
+  NS_IMETHOD SetOutputErrorBehavior(
+      PRInt32 aBehavior,
+      nsIUnicharEncoder * aEncoder, PRUnichar aChar);
+
+  NS_IMETHOD FillInfo(PRUint32* aInfo);
+};
+
+
+enum {
+ eZWNJ = 0x200C,
+ eZWJ = 0x200D,
+ eLRM = 0x200E,
+ eRLM = 0x200F,
+ eLRE = 0x202A,
+ eRLE = 0x202B,
+ ePDF = 0x202C,
+ eLRO = 0x202D,
+ eRLO = 0x202E
+};
+// I currently only put in hack to show what this function will do in the
+// future after implement by LangBox
+// Done:
+// 1. Logical order to Visual order
+// 2. Arabic char to Arabic Isolated form
+// 
+// To Do:
+// 1. Arabic char to presentation form (shaping)
+// 2. Lam Alef ligature
+// 
+NS_IMETHODIMP nsUnicodeToLangBoxArabic8::Convert(
+      const PRUnichar * aSrc, PRInt32 * aSrcLength,
+      char * aDest, PRInt32 * aDestLength)
+{
+   unsigned char* dest = (unsigned char*)aDest;
+   PRInt32 outlen = 0;
+   if(*aSrc<=0) {
+      *aDestLength = 0;
+      return NS_OK;
+   }
+   const PRUnichar *in = aSrc + *aSrcLength-1;
+   // scanning from logical end to start, which mean visually left to right
+   while((in >= aSrc) && (outlen < *aDestLength))
+   {
+      // begin of hack
+      // replace the following code with real arabic shaping
+      PRUnichar aChar = *in;
+      if((0x0600 >= aChar) && (aChar >=0x066F)) {
+        
+        if((0x061F >= aChar) && (aChar >=0x064A)) {
+            *dest++ = (unsigned char)(aChar - 0x061F + 0xBF);
+            outlen++;
+        } else if((0x064B >= aChar) && (aChar >=0x0652)) {
+            *dest++ = (unsigned char)(aChar - 0x064B + 0xA8);
+            outlen++;
+        } else if((0x0660 >= aChar) && (aChar >=0x0669)) {
+            *dest++ = (unsigned char)(aChar - 0x0660 + 0xB0);
+            outlen++;
+        } else if(0x060C == aChar) {
+            *dest++ = (unsigned char)0xBA;
+            outlen++;
+        } else if(0x061B == aChar) {
+            *dest++ = (unsigned char)0xBB;
+            outlen++;
+        } else { 
+         // do nothing
+        }
+      } else  {
+         // do nothing
+      }
+      in--;
+      // end of hack
+   }
+   *aDestLength = outlen;
+   return NS_OK;
+}
+
+NS_IMETHODIMP nsUnicodeToLangBoxArabic8::Finish(
+      char * aDest, PRInt32 * aDestLength)
+{
+   *aDestLength=0;
+   return NS_OK;
+}
+
+NS_IMETHODIMP nsUnicodeToLangBoxArabic8::GetMaxLength(
+      const PRUnichar * aSrc, PRInt32 aSrcLength,
+      PRInt32 * aDestLength)
+{
+   *aDestLength = aSrcLength;
+   return NS_OK;
+}
+
+NS_IMETHODIMP nsUnicodeToLangBoxArabic8::Reset()
+{
+   return NS_OK;
+}
+
+NS_IMETHODIMP nsUnicodeToLangBoxArabic8::SetOutputErrorBehavior(
+      PRInt32 aBehavior,
+      nsIUnicharEncoder * aEncoder, PRUnichar aChar)
+{
+   return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP nsUnicodeToLangBoxArabic8::FillInfo(PRUint32* aInfo)
+{
+   PRUnichar i;
+   // I think we should also add Presentation Form B here 
+   // Bi-di format char
+   for(i=eZWNJ;i<=eRLM;i++)
+      SET_REPRESENTABLE(aInfo, i);      
+   for(i=eLRE;i<=eRLO;i++)
+      SET_REPRESENTABLE(aInfo, i);      
+
+   SET_REPRESENTABLE(aInfo, 0x060c);      
+   SET_REPRESENTABLE(aInfo, 0x061b);      
+   SET_REPRESENTABLE(aInfo, 0x061f);      
+   for(i=0x0621;i<=0x063a;i++)
+      SET_REPRESENTABLE(aInfo, i);      
+   for(i=0x0640;i<=0x0652;i++)
+      SET_REPRESENTABLE(aInfo, i);      
+   for(i=0x0660;i<=0x0669;i++)
+      SET_REPRESENTABLE(aInfo, i);      
+   return NS_OK;
+}
+nsresult NEW_UnicodeToLangBoxArabic8(nsISupports **aResult)
+{
+  nsIUnicodeEncoder *p = new nsUnicodeToLangBoxArabic8();
+  if(p) {
+   *aResult = p;
+   return NS_OK;
+  }
+  return NS_ERROR_OUT_OF_MEMORY; 
+}

intl/uconv/ucvlatin/nsUnicodeToLangBoxArabic8.h

@@ -0,0 +1,25 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.0 (the "License"); you may not use this file except in
+ * compliance with the License.  You may obtain a copy of the License at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * The Original Code is Mozilla Communicator client code.
+ *
+ * The Initial Developer of the Original Code is Netscape Communications
+ * Corporation.  Portions created by Netscape are Copyright (C) 1998
+ * Netscape Communications Corporation.  All Rights Reserved.
+ */
+#ifndef nsUnicodeToLangBoxArabic8_h__
+#define nsUnicodeToLangBoxArabic8_h__
+#include "nsISupports.h"
+
+nsresult NEW_UnicodeToLangBoxArabic8(nsISupports **aResult);
+
+#endif // nsUnicodeToLangBoxArabic8_h__