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 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;
}
PRUnichar*
nsTextFrameUtils::TransformText(const PRUnichar* aText, PRUint32 aLength,
PRUnichar* aOutput,
CompressionMode aCompression,
PRUint8* aIncomingFlags,
gfxSkipCharsBuilder* aSkipChars,
PRUint32* aAnalysisFlags)
{
PRUint32 flags = 0;
PRUnichar* outputStart = aOutput;
PRBool lastCharArabic = PR_FALSE;
if (aCompression == COMPRESS_NONE) {
// Skip discardables.
PRUint32 i;
for (i = 0; i < aLength; ++i) {
PRUnichar ch = *aText++;
if (IsDiscardable(ch, &flags)) {
aSkipChars->SkipChar();
} else {
aSkipChars->KeepChar();
if (ch == '\t') {
flags |= TEXT_HAS_TAB;
} else if (ch != ' ' && ch != '\n') {
// we already know it's not a tab from the previous check
lastCharArabic = IS_ARABIC_CHAR(ch);
}
*aOutput++ = ch;
}
}
if (lastCharArabic) {
*aIncomingFlags |= INCOMING_ARABICCHAR;
} else {
*aIncomingFlags &= ~INCOMING_ARABICCHAR;
}
*aIncomingFlags &= ~INCOMING_WHITESPACE;
} else {
PRBool inWhitespace = (*aIncomingFlags & INCOMING_WHITESPACE) != 0;
PRUint32 i;
for (i = 0; i < aLength; ++i) {
PRUnichar ch = *aText++;
PRBool nowInWhitespace;
if (ch == ' ' &&
(i + 1 >= aLength ||
!IsSpaceCombiningSequenceTail(aText, aLength - (i + 1)))) {
nowInWhitespace = PR_TRUE;
} else if (ch == '\n' && aCompression == COMPRESS_WHITESPACE_NEWLINE) {
if (i > 0 && IS_CJ_CHAR(aText[-1]) &&
i + 1 < aLength && IS_CJ_CHAR(aText[1])) {
// Discard newlines between CJK chars.
// XXX this really requires more context to get right!
aSkipChars->SkipChar();
continue;
}
nowInWhitespace = PR_TRUE;
} else {
nowInWhitespace = ch == '\t';
}
if (!nowInWhitespace) {
if (IsDiscardable(ch, &flags)) {
aSkipChars->SkipChar();
nowInWhitespace = inWhitespace;
} else {
*aOutput++ = ch;
aSkipChars->KeepChar();
lastCharArabic = IS_ARABIC_CHAR(ch);
}
} else {
if (inWhitespace) {
aSkipChars->SkipChar();
} else {
if (ch != ' ') {
flags |= TEXT_WAS_TRANSFORMED;
}
*aOutput++ = ' ';
aSkipChars->KeepChar();
}
}
inWhitespace = nowInWhitespace;
}
if (lastCharArabic) {
*aIncomingFlags |= INCOMING_ARABICCHAR;
} else {
*aIncomingFlags &= ~INCOMING_ARABICCHAR;
}
if (inWhitespace) {
*aIncomingFlags |= INCOMING_WHITESPACE;
} else {
*aIncomingFlags &= ~INCOMING_WHITESPACE;
}
}
if (outputStart + aLength != aOutput) {
flags |= TEXT_WAS_TRANSFORMED;
}
*aAnalysisFlags = flags;
return aOutput;
}
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 ArabicShaping(const PRUnichar* aString, PRUint32 aLen,
PRUnichar* aBuf, PRUint32 *aBufLen,
PRBool aInputLogical, PRBool aOutputLogical)
{
nsAutoString tempString(aString, aLen);
if (tempString.Length() != aLen)
return NS_ERROR_OUT_OF_MEMORY;
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 if (0x200C == *lSrc || 0x200D == *lSrc)
// Strip zero-width joining controls ZWJ and ZWNJ from the shaped text
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;
}