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gecko-dev/layout/base/nsBidiUtils.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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/MPL/
*
* 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.org code.
*
* The Initial Developer of the Original Code is
* IBM Corporation.
* Portions created by the Initial Developer are Copyright (C) 2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Maha Abou El Rous <mahar@eg.ibm.com>
* Lina Kemmel <lkemmel@il.ibm.com>
* Simon Montagu <smontagu@netscape.com>
* Roozbeh Pournader <roozbeh@sharif.edu>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsBidiUtils.h"
#define FE_TO_06_OFFSET 0xfe70
static const PRUnichar FE_TO_06 [][2] = {
{0x064b,0x0000},{0x064b,0x0640},{0x064c,0x0000},
{0x0000,0x0000},{0x064d,0x0000},{0x0000,0x0000},
{0x064e,0x0000},{0x064e,0x0640},{0x064f,0x0000},
{0x064f,0x0640},{0x0650,0x0000},{0x0650,0x0640},
{0x0651,0x0000},{0x0651,0x0640},{0x0652,0x0000},
{0x0652,0x0640},{0x0621,0x0000},{0x0622,0x0000},
{0x0622,0x0000},{0x0623,0x0000},{0x0623,0x0000},
{0x0624,0x0000},{0x0624,0x0000},{0x0625,0x0000},
{0x0625,0x0000},{0x0626,0x0000},{0x0626,0x0000},
{0x0626,0x0000},{0x0626,0x0000},{0x0627,0x0000},
{0x0627,0x0000},{0x0628,0x0000},{0x0628,0x0000},
{0x0628,0x0000},{0x0628,0x0000},{0x0629,0x0000},
{0x0629,0x0000},{0x062a,0x0000},{0x062a,0x0000},
{0x062a,0x0000},{0x062a,0x0000},{0x062b,0x0000},
{0x062b,0x0000},{0x062b,0x0000},{0x062b,0x0000},
{0x062c,0x0000},{0x062c,0x0000},{0x062c,0x0000},
{0x062c,0x0000},{0x062d,0x0000},{0x062d,0x0000},
{0x062d,0x0000},{0x062d,0x0000},{0x062e,0x0000},
{0x062e,0x0000},{0x062e,0x0000},{0x062e,0x0000},
{0x062f,0x0000},{0x062f,0x0000},{0x0630,0x0000},
{0x0630,0x0000},{0x0631,0x0000},{0x0631,0x0000},
{0x0632,0x0000},{0x0632,0x0000},{0x0633,0x0000},
{0x0633,0x0000},{0x0633,0x0000},{0x0633,0x0000},
{0x0634,0x0000},{0x0634,0x0000},{0x0634,0x0000},
{0x0634,0x0000},{0x0635,0x0000},{0x0635,0x0000},
{0x0635,0x0000},{0x0635,0x0000},{0x0636,0x0000},
{0x0636,0x0000},{0x0636,0x0000},{0x0636,0x0000},
{0x0637,0x0000},{0x0637,0x0000},{0x0637,0x0000},
{0x0637,0x0000},{0x0638,0x0000},{0x0638,0x0000},
{0x0638,0x0000},{0x0638,0x0000},{0x0639,0x0000},
{0x0639,0x0000},{0x0639,0x0000},{0x0639,0x0000},
{0x063a,0x0000},{0x063a,0x0000},{0x063a,0x0000},
{0x063a,0x0000},{0x0641,0x0000},{0x0641,0x0000},
{0x0641,0x0000},{0x0641,0x0000},{0x0642,0x0000},
{0x0642,0x0000},{0x0642,0x0000},{0x0642,0x0000},
{0x0643,0x0000},{0x0643,0x0000},{0x0643,0x0000},
{0x0643,0x0000},{0x0644,0x0000},{0x0644,0x0000},
{0x0644,0x0000},{0x0644,0x0000},{0x0645,0x0000},
{0x0645,0x0000},{0x0645,0x0000},{0x0645,0x0000},
{0x0646,0x0000},{0x0646,0x0000},{0x0646,0x0000},
{0x0646,0x0000},{0x0647,0x0000},{0x0647,0x0000},
{0x0647,0x0000},{0x0647,0x0000},{0x0648,0x0000},
{0x0648,0x0000},{0x0649,0x0000},{0x0649,0x0000},
{0x064a,0x0000},{0x064a,0x0000},{0x064a,0x0000},
{0x064a,0x0000},{0x0644,0x0622},{0x0644,0x0622},
{0x0644,0x0623},{0x0644,0x0623},{0x0644,0x0625},
{0x0644,0x0625},{0x0644,0x0627},{0x0644,0x0627}
};
static const PRUnichar FB_TO_06 [] = {
0x0671,0x0671,0x067B,0x067B,0x067B,0x067B,0x067E,0x067E, //FB50-FB57
0x067E,0x067E,0x0680,0x0680,0x0680,0x0680,0x067A,0x067A, //FB58-FB5F
0x067A,0x067A,0x067F,0x067F,0x067F,0x067F,0x0679,0x0679, //FB60-FB67
0x0679,0x0679,0x06A4,0x06A4,0x06A4,0x06A4,0x06A6,0x06A6, //FB68-FB6F
0x06A6,0x06A6,0x0684,0x0684,0x0684,0x0684,0x0683,0x0683, //FB70-FB77
0x0683,0x0683,0x0686,0x0686,0x0686,0x0686,0x0687,0x0687, //FB78-FB7F
0x0687,0x0687,0x068D,0x068D,0x068C,0x068C,0x068E,0x068E, //FB80-FB87
0x0688,0x0688,0x0698,0x0698,0x0691,0x0691,0x06A9,0x06A9, //FB88-FB8F
0x06A9,0x06A9,0x06AF,0x06AF,0x06AF,0x06AF,0x06B3,0x06B3, //FB90-FB97
0x06B3,0x06B3,0x06B1,0x06B1,0x06B1,0x06B1,0x06BA,0x06BA, //FB98-FB9F
0x06BB,0x06BB,0x06BB,0x06BB,0x06C0,0x06C0,0x06C1,0x06C1, //FBA0-FBA7
0x06C1,0x06C1,0x06BE,0x06BE,0x06BE,0x06BE,0x06D2,0x06D2, //FBA8-FBAF
0x06D3,0x06D3,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000, //FBB0-FBB7
0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000, //FBB8-FBBF
0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000, //FBC0-FBC7
0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000, //FBC8-FBCF
0x0000,0x0000,0x0000,0x06AD,0x06AD,0x06AD,0x06AD,0x06C7, //FBD0-FBD7
0x06C7,0x06C6,0x06C6,0x06C8,0x06C8,0x0677,0x06CB,0x06CB, //FBD8-FBDF
0x06C5,0x06C5,0x06C9,0x06C9,0x06D0,0x06D0,0x06D0,0x06D0, //FBE0-FBE7
0x0649,0x0649,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000, //FBE8-FBEF
0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000, //FBF0-FBF7
0x0000,0x0000,0x0000,0x0000,0x06CC,0x06CC,0x06CC,0x06CC //FBF8-FBFF
};
#define PresentationToOriginal(c, order) \
(((0xFE70 <= (c) && (c) <= 0xFEFC)) ? \
FE_TO_06[(c)- FE_TO_06_OFFSET][order] : \
(((0xFB50 <= (c) && (c) <= 0xFBFF) && (order) == 0) ? \
FB_TO_06[(c)-0xFB50] : (PRUnichar) 0x0000))
//============ Begin Arabic Basic to Presentation Form B Code ============
// Note: the following code are moved from gfx/src/windows/nsRenderingContextWin.cpp
static const PRUint8 gArabicMap1[] = {
0x81, 0x83, 0x85, 0x87, 0x89, 0x8D, // 0622-0627
0x8F, 0x93, 0x95, 0x99, 0x9D, 0xA1, 0xA5, 0xA9, // 0628-062F
0xAB, 0xAD, 0xAF, 0xB1, 0xB5, 0xB9, 0xBD, 0xC1, // 0630-0637
0xC5, 0xC9, 0xCD // 0638-063A
};
static const PRUint8 gArabicMap2[] = {
0xD1, 0xD5, 0xD9, 0xDD, 0xE1, 0xE5, 0xE9, // 0641-0647
0xED, 0xEF, 0xF1 // 0648-064A
};
static const PRUint8 gArabicMapEx[] = {
0x50, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0671-0677
0x00, 0x66, 0x5E, 0x52, 0x00, 0x00, 0x56, 0x62, // 0678-067F
0x5A, 0x00, 0x00, 0x76, 0x72, 0x00, 0x7A, 0x7E, // 0680-0687
0x88, 0x00, 0x00, 0x00, 0x84, 0x82, 0x86, 0x00, // 0688-068F
0x00, 0x8C, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0690-0697
0x8A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0698-069F
0x00, 0x00, 0x00, 0x00, 0x6A, 0x00, 0x6E, 0x00, // 06A0-06A7
0x00, 0x8E, 0x00, 0x00, 0x00, 0xD3, 0x00, 0x92, // 06A8-06AF
0x00, 0x9A, 0x00, 0x96, 0x00, 0x00, 0x00, 0x00, // 06B0-06B7
0x00, 0x00, 0x9E, 0xA0, 0x00, 0x00, 0xAA, 0x00, // 06B8-06BF
0xA4, 0xA6, 0x00, 0x00, 0x00, 0xE0, 0xD9, 0xD7, // 06C0-06C7
0xDB, 0xE2, 0x00, 0xDE, 0xFC, 0x00, 0x00, 0x00, // 06C8-06CF
0xE4, 0x00, 0xAE, 0xB0 // 06D0-06D3
};
#define PresentationFormB(c, form) \
(((0x0622<=(c)) && ((c)<=0x063A)) ? \
(0xFE00|(gArabicMap1[(c)-0x0622] + (form))) : \
(((0x0641<=(c)) && ((c)<=0x064A)) ? \
(0xFE00|(gArabicMap2[(c)-0x0641] + (form))) : \
(((0x0671<=(c)) && ((c))<=0x06D3) && gArabicMapEx[(c)-0x0671]) ? \
(0xFB00|(gArabicMapEx[(c)-0x0671] + (form))) : (c)))
typedef enum {
eIsolated, // or Char N
eFinal, // or Char R
eInitial, // or Char L
eMedial // or Char M
} eArabicForm;
typedef enum {
eTr = 0, // Transparent
eRJ = 1, // Right-Joining
eLJ = 2, // Left-Joining
eDJ = 3, // Dual-Joining
eNJ = 4, // Non-Joining
eJC = 7, // Joining Causing
eRightJCMask = 2, // bit of Right-Join Causing
eLeftJCMask = 1 // bit of Left-Join Causing
} eArabicJoiningClass;
#define RightJCClass(j) (eRightJCMask&(j))
#define LeftJCClass(j) (eLeftJCMask&(j))
#define DecideForm(jl,j,jr) \
(((eRJ == (j)) && RightJCClass(jr)) ? eFinal \
: \
((eDJ == (j)) ? \
((RightJCClass(jr)) ? \
(((LeftJCClass(jl)) ? eMedial \
: eFinal)) \
: \
(((LeftJCClass(jl)) ? eInitial \
: eIsolated)) \
) : eIsolated)) \
// All letters without an equivalen in the FB50 block are 'eNJ' here. This
// should be fixed after finding some better mechanism for handling Arabic.
static const PRInt8 gJoiningClass[] = {
eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, // 0600-0607
eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, // 0608-060F
eTr, eTr, eTr, eTr, eTr, eTr, eNJ, eNJ, // 0610-0617
eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, // 0618-061F
eNJ, eNJ, eRJ, eRJ, eRJ, eRJ, eDJ, eRJ, // 0620-0627
eDJ, eRJ, eDJ, eDJ, eDJ, eDJ, eDJ, eRJ, // 0628-062F
eRJ, eRJ, eRJ, eDJ, eDJ, eDJ, eDJ, eDJ, // 0630-0637
eDJ, eDJ, eDJ, eNJ, eNJ, eNJ, eNJ, eNJ, // 0638-063F
eJC, eDJ, eDJ, eDJ, eDJ, eDJ, eDJ, eDJ, // 0640-0647
eRJ, eDJ, eDJ, eTr, eTr, eTr, eTr, eTr, // 0648-064F
eTr, eTr, eTr, eTr, eTr, eTr, eTr, eTr, // 0650-0657
eTr, eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, // 0658-065F
eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, // 0660-0667
eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, // 0668-066F
eTr, eRJ, eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, // 0670-0677
eNJ, eDJ, eDJ, eDJ, eNJ, eNJ, eDJ, eDJ, // 0678-067F
eDJ, eNJ, eNJ, eDJ, eDJ, eNJ, eDJ, eDJ, // 0680-0687
eRJ, eNJ, eNJ, eNJ, eRJ, eRJ, eRJ, eNJ, // 0688-068F
eNJ, eRJ, eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, // 0690-0697
eRJ, eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, // 0698-069F
eNJ, eNJ, eNJ, eNJ, eDJ, eNJ, eDJ, eNJ, // 06A0-06A7
eNJ, eDJ, eNJ, eNJ, eNJ, eDJ, eNJ, eDJ, // 06A8-06AF
eNJ, eDJ, eNJ, eDJ, eNJ, eNJ, eNJ, eNJ, // 06B0-06B7
eNJ, eNJ, eDJ, eDJ, eNJ, eNJ, eDJ, eNJ, // 06B8-06BF
eRJ, eDJ, eNJ, eNJ, eNJ, eRJ, eRJ, eRJ, // 06C0-06C7
eRJ, eRJ, eNJ, eRJ, eDJ, eNJ, eNJ, eNJ, // 06C8-06CF
eDJ, eNJ, eRJ, eRJ, eNJ, eNJ, eTr, eTr, // 06D0-06D7
eTr, eTr, eTr, eTr, eTr, eNJ, eNJ, eTr, // 06D8-06DF
eTr, eTr, eTr, eTr, eTr, eNJ, eNJ, eTr, // 06E0-06E7
eTr, eNJ, eTr, eTr, eTr, eTr, eNJ, eNJ, // 06E8-06EF
eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, // 06F0-06F7
eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, eNJ, eNJ // 06F8-06FF
};
#define GetJoiningClass(c) \
((IS_ARABIC_CHAR(c)) ? \
(gJoiningClass[(c) - 0x0600]) : \
((0x200D == (c)) ? eJC : eTr))
static const PRUint16 gArabicLigatureMap[] =
{
0x82DF, // 0xFE82 0xFEDF -> 0xFEF5
0x82E0, // 0xFE82 0xFEE0 -> 0xFEF6
0x84DF, // 0xFE84 0xFEDF -> 0xFEF7
0x84E0, // 0xFE84 0xFEE0 -> 0xFEF8
0x88DF, // 0xFE88 0xFEDF -> 0xFEF9
0x88E0, // 0xFE88 0xFEE0 -> 0xFEFA
0x8EDF, // 0xFE8E 0xFEDF -> 0xFEFB
0x8EE0 // 0xFE8E 0xFEE0 -> 0xFEFC
};
#define ARABIC_TO_HINDI_DIGIT_INCREMENT (START_HINDI_DIGITS - START_ARABIC_DIGITS)
#define NUM_TO_ARABIC(c) \
((((c)>=START_HINDI_DIGITS) && ((c)<=END_HINDI_DIGITS)) ? \
((c) - (PRUint16)ARABIC_TO_HINDI_DIGIT_INCREMENT) : \
(c))
#define NUM_TO_HINDI(c) \
((((c)>=START_ARABIC_DIGITS) && ((c)<=END_ARABIC_DIGITS)) ? \
((c) + (PRUint16)ARABIC_TO_HINDI_DIGIT_INCREMENT): \
(c))
// helper function to reverse a PRUnichar buffer
static void ReverseString(PRUnichar* aBuffer, PRUint32 aLen)
{
PRUnichar *start, *end;
PRUnichar swapChar;
for (start = aBuffer, end = aBuffer + aLen - 1; start < end; ++start, --end) {
swapChar = *start;
*start = *end;
*end = swapChar;
}
}
nsresult ArabicShaping(const PRUnichar* aString, PRUint32 aLen,
PRUnichar* aBuf, PRUint32 *aBufLen,
PRBool aInputLogical, PRBool aOutputLogical)
{
nsAutoString tempString(aString, aLen);
PRUnichar *tempBuf = tempString.BeginWriting();
if (aInputLogical) {
ReverseString(tempBuf, aLen);
}
const PRUnichar* src = tempBuf;
const PRUnichar* p;
PRUnichar* dest = aBuf;
PRUnichar formB;
PRInt8 leftJ, thisJ, rightJ;
PRInt8 leftNoTrJ, rightNoTrJ;
thisJ = leftNoTrJ = eNJ;
rightJ = GetJoiningClass(*(src));
while(src<tempBuf+aLen-1) {
leftJ = thisJ;
if ((eTr != leftJ) || ((leftJ == eTr) &&
( ( (src-1) >= tempBuf) && !IS_ARABIC_CHAR(*(src-1)))))
leftNoTrJ = thisJ;
if(src-2 >= (tempBuf)){
for(p=src-2; (p >= (tempBuf))&& (eTr == leftNoTrJ) && (IS_ARABIC_CHAR(*(p+1))) ; p--)
leftNoTrJ = GetJoiningClass(*(p)) ;
}
thisJ = rightJ;
rightJ = rightNoTrJ = GetJoiningClass(*(src+1)) ;
if(src+2 <= (tempBuf+aLen-1)){
for(p=src+2; (p <= (tempBuf+aLen-1))&&(eTr == rightNoTrJ) && (IS_ARABIC_CHAR(*(src+1))); p++)
rightNoTrJ = GetJoiningClass(*(p)) ;
}
formB = PresentationFormB(*src, DecideForm(leftNoTrJ, thisJ, rightNoTrJ));
*dest++ = formB;
src++;
}
if((eTr != thisJ) ||
((thisJ == eTr) && (((src-1)>=tempBuf) && (!IS_ARABIC_CHAR(*(src-1))))))
leftNoTrJ = thisJ;
if(src-2 >= (tempBuf)){
for(p=src-2; (src-2 >= (tempBuf)) && (eTr == leftNoTrJ) && (IS_ARABIC_CHAR(*(p+1))); p--)
leftNoTrJ = GetJoiningClass(*(p)) ;
}
formB = PresentationFormB(*src, DecideForm(leftNoTrJ, rightJ, eNJ));
*dest++ = formB;
src++;
PRUnichar *lSrc = aBuf;
PRUnichar *lDest = aBuf;
while(lSrc < (dest-1)) {
PRUnichar next = *(lSrc+1);
if(((0xFEDF == next) || (0xFEE0 == next)) &&
(0xFE80 == (0xFFF1 & *lSrc))) {
PRBool done = PR_FALSE;
PRUint16 key = ((*lSrc) << 8) | ( 0x00FF & next);
PRUint16 i;
for(i=0;i<8;i++) {
if(key == gArabicLigatureMap[i]) {
done = PR_TRUE;
// lam and alef in the source are mapped to a lam-alef ligature in the
// destination, so lSrc is incremented by 2 here
*lDest++ = 0xFEF5 + i;
lSrc+=2;
break;
}
}
if(! done)
*lDest++ = *lSrc++;
}
else
*lDest++ = *lSrc++;
}
if(lSrc < dest)
*lDest++ = *lSrc++;
*aBufLen = lDest - aBuf;
NS_ASSERTION(*aBufLen <= aLen, "ArabicShaping() likely did a buffer overflow!");
if (aOutputLogical) {
ReverseString(aBuf, *aBufLen);
}
return NS_OK;
}
nsresult Conv_FE_06(const nsString& aSrc, nsString& aDst)
{
PRUnichar *aSrcUnichars = (PRUnichar *)aSrc.get();
PRUint32 i, size = aSrc.Length();
aDst.Truncate();
for (i=0;i<size;i++) { // i : Source
if (aSrcUnichars[i] == 0x0000)
break; // no need to convert char after the NULL
if (IS_FE_CHAR(aSrcUnichars[i])) {
//ahmed for lamalf
PRUnichar ch = (PresentationToOriginal(aSrcUnichars[i], 1));
if(ch)
aDst += ch;
ch=(PresentationToOriginal(aSrcUnichars[i], 0));
if(ch)
aDst += ch;
else //if it is 00, just output what we have in FExx
aDst += aSrcUnichars[i];
} else {
aDst += aSrcUnichars[i]; // copy it even if it is not in FE range
}
}// for : loop the buffer
return NS_OK;
}
nsresult Conv_FE_06_WithReverse(const nsString& aSrc, nsString& aDst)
{
PRUnichar *aSrcUnichars = (PRUnichar *)aSrc.get();
PRBool foundArabic = PR_FALSE;
PRUint32 i, endArabic, beginArabic, size;
beginArabic = 0;
size = aSrc.Length();
aDst.Truncate();
for (endArabic=0;endArabic<size;endArabic++) {
if (aSrcUnichars[endArabic] == 0x0000)
break; // no need to convert char after the NULL
while( (IS_FE_CHAR(aSrcUnichars[endArabic]))||
(IS_ARABIC_CHAR(aSrcUnichars[endArabic]))||
(IS_ARABIC_DIGIT(aSrcUnichars[endArabic]))||
(aSrcUnichars[endArabic]==0x0020))
{
if(! foundArabic ) {
beginArabic=endArabic;
foundArabic= PR_TRUE;
}
endArabic++;
}
if(foundArabic) {
endArabic--;
for (i=endArabic; i>=beginArabic; i--) {
if(IS_FE_CHAR(aSrcUnichars[i])) {
//ahmed for the bug of lamalf
aDst += PresentationToOriginal(aSrcUnichars[i], 0);
if (PresentationToOriginal(aSrcUnichars[i], 1)) {
// Two characters, we have to resize the buffer :(
aDst += PresentationToOriginal(aSrcUnichars[i], 1);
} // if expands to 2 char
} else {
// do we need to check the following if ?
if((IS_ARABIC_CHAR(aSrcUnichars[i]))||
(IS_ARABIC_DIGIT(aSrcUnichars[i]))||
(aSrcUnichars[i]==0x0020))
aDst += aSrcUnichars[i];
}
}
} else {
aDst += aSrcUnichars[endArabic];
}
foundArabic=PR_FALSE;
}// for : loop the buffer
return NS_OK;
}
nsresult Conv_06_FE_WithReverse(const nsString& aSrc,
nsString& aDst,
PRUint32 aDir)
{
PRUnichar *aSrcUnichars = (PRUnichar *)aSrc.get();
PRUint32 i, beginArabic, endArabic, size;
beginArabic = 0;
size = aSrc.Length();
aDst.Truncate();
PRBool foundArabic = PR_FALSE;
for (endArabic=0;endArabic<size;endArabic++) {
if (aSrcUnichars[endArabic] == 0x0000)
break; // no need to convert char after the NULL
while( (IS_06_CHAR(aSrcUnichars[endArabic])) ||
(IS_ARABIC_CHAR(aSrcUnichars[endArabic])) ||
(aSrcUnichars[endArabic]==0x0020) ||
(IS_ARABIC_DIGIT(aSrcUnichars[endArabic])) )
{
if(! foundArabic) {
beginArabic=endArabic;
foundArabic=PR_TRUE;
}
endArabic++;
}
if(foundArabic) {
endArabic--;
PRUnichar buf[8192];
PRUint32 len=8192;
ArabicShaping(&aSrcUnichars[beginArabic], endArabic-beginArabic+1,
buf, &len,
PR_TRUE, PR_FALSE);
// to reverse the numerals
PRUint32 endNumeral, beginNumeral = 0;
for (endNumeral=0;endNumeral<=len-1;endNumeral++){
PRBool foundNumeral = PR_FALSE;
while((endNumeral < len) && (IS_ARABIC_DIGIT(buf[endNumeral])) ) {
if(!foundNumeral)
{
foundNumeral=PR_TRUE;
beginNumeral=endNumeral;
}
endNumeral++;
}
if(foundNumeral){
endNumeral--;
PRUnichar numbuf[20];
for(i=beginNumeral; i<=endNumeral; i++){
numbuf[i-beginNumeral]=buf[endNumeral-i+beginNumeral];
}
for(i=0;i<=endNumeral-beginNumeral;i++){
buf[i+beginNumeral]=numbuf[i];
}
}
}
if(aDir==1){//ltr
for (i=0;i<=len-1;i++){
aDst+= buf[i];
}
}
else if(aDir==2){//rtl
for (i=0;i<=len-1;i++){
aDst+= buf[len-1-i];
}
}
} else {
aDst += aSrcUnichars[endArabic];
}
foundArabic=PR_FALSE;
}// for : loop the buffer
return NS_OK;
}
nsresult HandleNumbers(PRUnichar* aBuffer, PRUint32 aSize, PRUint32 aNumFlag)
{
PRUint32 i;
// IBMBIDI_NUMERAL_NOMINAL *
// IBMBIDI_NUMERAL_REGULAR
// IBMBIDI_NUMERAL_HINDICONTEXT
// IBMBIDI_NUMERAL_ARABIC
// IBMBIDI_NUMERAL_HINDI
switch (aNumFlag) {
case IBMBIDI_NUMERAL_HINDI:
for (i=0;i<aSize;i++)
aBuffer[i] = NUM_TO_HINDI(aBuffer[i]);
break;
case IBMBIDI_NUMERAL_ARABIC:
for (i=0;i<aSize;i++)
aBuffer[i] = NUM_TO_ARABIC(aBuffer[i]);
break;
case IBMBIDI_NUMERAL_REGULAR:
case IBMBIDI_NUMERAL_HINDICONTEXT:
// for clipboard handling
//XXX do we really want to convert numerals when copying text?
for (i=1;i<aSize;i++) {
if (IS_ARABIC_CHAR(aBuffer[i-1]))
aBuffer[i] = NUM_TO_HINDI(aBuffer[i]);
else
aBuffer[i] = NUM_TO_ARABIC(aBuffer[i]);
}
case IBMBIDI_NUMERAL_NOMINAL:
default:
break;
}
return NS_OK;
}
nsresult HandleNumbers(const nsString& aSrc, nsString& aDst)
{
aDst = aSrc;
return HandleNumbers((PRUnichar *)aDst.get(),aDst.Length(), IBMBIDI_NUMERAL_REGULAR);
}
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