NS_IMETHODIMP
nsSaveAsCharset::DoCharsetConversion(const PRUnichar *inString, char **outString)
{
NS_ENSURE_ARG_POINTER(outString);
*outString = nullptr;
nsresult rv;
int32_t inStringLength = NS_strlen(inString); // original input string length
int32_t bufferLength; // allocated buffer length
int32_t srcLength = inStringLength;
int32_t dstLength;
int32_t pos1, pos2;
nsresult saveResult = NS_OK; // to remember NS_ERROR_UENC_NOMAPPING
// estimate and allocate the target buffer (reserve extra memory for fallback)
rv = mEncoder->GetMaxLength(inString, inStringLength, &dstLength);
if (NS_FAILED(rv)) return rv;
bufferLength = dstLength + RESERVE_FALLBACK_BYTES; // extra bytes for fallback
// + 1 is for the terminating NUL -- we don't add that to bufferLength so that
// we can always write dstPtr[pos2] = '\0' even when the encoder filled the
// buffer.
char *dstPtr = (char *) PR_Malloc(bufferLength + 1);
if (!dstPtr) {
return NS_ERROR_OUT_OF_MEMORY;
}
for (pos1 = 0, pos2 = 0; pos1 < inStringLength;) {
// convert from unicode
dstLength = bufferLength - pos2;
NS_ASSERTION(dstLength >= 0, "out of bounds write");
rv = mEncoder->Convert(&inString[pos1], &srcLength, &dstPtr[pos2], &dstLength);
pos1 += srcLength ? srcLength : 1;
pos2 += dstLength;
dstPtr[pos2] = '\0';
// break: this is usually the case (no error) OR unrecoverable error
if (NS_ERROR_UENC_NOMAPPING != rv) break;
// remember this happened and reset the result
saveResult = rv;
rv = NS_OK;
// finish encoder, give it a chance to write extra data like escape sequences
dstLength = bufferLength - pos2;
rv = mEncoder->Finish(&dstPtr[pos2], &dstLength);
if (NS_SUCCEEDED(rv)) {
pos2 += dstLength;
dstPtr[pos2] = '\0';
}
srcLength = inStringLength - pos1;
// do the fallback
if (!ATTR_NO_FALLBACK(mAttribute)) {
uint32_t unMappedChar;
if (NS_IS_HIGH_SURROGATE(inString[pos1-1]) &&
inStringLength > pos1 && NS_IS_LOW_SURROGATE(inString[pos1])) {
unMappedChar = SURROGATE_TO_UCS4(inString[pos1-1], inString[pos1]);
pos1++;
} else {
unMappedChar = inString[pos1-1];
}
rv = mEncoder->GetMaxLength(inString+pos1, inStringLength-pos1, &dstLength);
if (NS_FAILED(rv))
break;
rv = HandleFallBack(unMappedChar, &dstPtr, &bufferLength, &pos2, dstLength);
if (NS_FAILED(rv))
break;
dstPtr[pos2] = '\0';
}
}
if (NS_SUCCEEDED(rv)) {
// finish encoder, give it a chance to write extra data like escape sequences
dstLength = bufferLength - pos2;
rv = mEncoder->Finish(&dstPtr[pos2], &dstLength);
if (NS_SUCCEEDED(rv)) {
pos2 += dstLength;
dstPtr[pos2] = '\0';
}
}
if (NS_FAILED(rv)) {
PR_FREEIF(dstPtr);
return rv;
}
*outString = dstPtr; // set the result string
// set error code so that the caller can do own fall back
if (NS_ERROR_UENC_NOMAPPING == saveResult) {
rv = NS_ERROR_UENC_NOMAPPING;
}
return rv;
}
NS_IMETHODIMP nsUnicodeToGBK::ConvertNoBuff(
const PRUnichar * aSrc,
PRInt32 * aSrcLength,
char * aDest,
PRInt32 * aDestLength)
{
PRInt32 iSrcLength = 0;
PRInt32 iDestLength = 0;
PRUnichar unicode;
nsresult res = NS_OK;
while (iSrcLength < *aSrcLength )
{
unicode = *aSrc;
//if unicode's hi byte has something, it is not ASCII, must be a GB
if(IS_ASCII(unicode))
{
// this is an ASCII
*aDest = CAST_UNICHAR_TO_CHAR(*aSrc);
aDest++; // increment 1 byte
iDestLength +=1;
} else {
char byte1, byte2;
if(mUtil.UnicodeToGBKChar( unicode, PR_FALSE, &byte1, &byte2))
{
// make sure we still have 2 bytes for output first
if(iDestLength+2 > *aDestLength)
{
res = NS_OK_UENC_MOREOUTPUT;
break;
}
aDest[0] = byte1;
aDest[1] = byte2;
aDest += 2; // increment 2 bytes
iDestLength +=2;
} else {
PRInt32 aOutLen = 2;
// make sure we still have 2 bytes for output first
if(iDestLength+2 > *aDestLength)
{
res = NS_OK_UENC_MOREOUTPUT;
break;
}
// we cannot map in the common mapping. Let's try to
// call the delegated 2 byte converter for the gbk or gb18030
// unique 2 byte mapping
if(TryExtensionEncoder(unicode, aDest, &aOutLen))
{
iDestLength += aOutLen;
aDest += aOutLen;
} else {
// make sure we still have 4 bytes for output first
if(iDestLength+4 > *aDestLength)
{
res = NS_OK_UENC_MOREOUTPUT;
break;
}
// we still cannot map. Let's try to
// call the delegated GB18030 4 byte converter
aOutLen = 4;
if( NS_IS_HIGH_SURROGATE(unicode) )
{
if((iSrcLength+1) < *aSrcLength ) {
if(EncodeSurrogate(aSrc[0],aSrc[1], aDest)) {
// since we got a surrogate pair, we need to increment src.
iSrcLength++ ;
aSrc++;
iDestLength += aOutLen;
aDest += aOutLen;
} else {
// only get a high surrogate, but not a low surrogate
res = NS_ERROR_UENC_NOMAPPING;
iSrcLength++; // include length of the unmapped character
break;
}
} else {
mSurrogateHigh = aSrc[0];
break; // this will go to afterwhileloop
}
} else {
if( NS_IS_LOW_SURROGATE(unicode) )
{
if(NS_IS_HIGH_SURROGATE(mSurrogateHigh)) {
if(EncodeSurrogate(mSurrogateHigh, aSrc[0], aDest)) {
iDestLength += aOutLen;
aDest += aOutLen;
} else {
// only get a high surrogate, but not a low surrogate
res = NS_ERROR_UENC_NOMAPPING;
iSrcLength++; // include length of the unmapped character
break;
}
} else {
// only get a low surrogate, but not a low surrogate
res = NS_ERROR_UENC_NOMAPPING;
iSrcLength++; // include length of the unmapped character
break;
}
} else {
if(Try4BytesEncoder(unicode, aDest, &aOutLen))
{
NS_ASSERTION((aOutLen == 4), "we should always generate 4 bytes here");
iDestLength += aOutLen;
aDest += aOutLen;
} else {
res = NS_ERROR_UENC_NOMAPPING;
iSrcLength++; // include length of the unmapped character
break;
}
}
}
}
}
}
iSrcLength++ ; // Each unicode char just count as one in PRUnichar string;
mSurrogateHigh = 0;
aSrc++;
if ( iDestLength >= (*aDestLength) && (iSrcLength < *aSrcLength) )
{
res = NS_OK_UENC_MOREOUTPUT;
break;
}
}
//afterwhileloop:
*aDestLength = iDestLength;
*aSrcLength = iSrcLength;
return res;
}
nsresult
nsHyphenator::Hyphenate(const nsAString& aString,
nsTArray<bool>& aHyphens)
{
if (!aHyphens.SetLength(aString.Length())) {
return NS_ERROR_OUT_OF_MEMORY;
}
memset(aHyphens.Elements(), false, aHyphens.Length());
bool inWord = false;
PRUint32 wordStart = 0, wordLimit = 0;
PRUint32 chLen;
for (PRUint32 i = 0; i < aString.Length(); i += chLen) {
PRUint32 ch = aString[i];
chLen = 1;
if (NS_IS_HIGH_SURROGATE(ch)) {
if (i + 1 < aString.Length() && NS_IS_LOW_SURROGATE(aString[i+1])) {
ch = SURROGATE_TO_UCS4(ch, aString[i+1]);
chLen = 2;
} else {
NS_WARNING("unpaired surrogate found during hyphenation");
}
}
nsIUGenCategory::nsUGenCategory cat = mCategories->Get(ch);
if (cat == nsIUGenCategory::kLetter || cat == nsIUGenCategory::kMark) {
if (!inWord) {
inWord = true;
wordStart = i;
}
wordLimit = i + chLen;
if (i + chLen < aString.Length()) {
continue;
}
}
if (inWord) {
const PRUnichar *begin = aString.BeginReading();
NS_ConvertUTF16toUTF8 utf8(begin + wordStart,
wordLimit - wordStart);
nsAutoTArray<char,200> utf8hyphens;
utf8hyphens.SetLength(utf8.Length() + 5);
char **rep = nsnull;
int *pos = nsnull;
int *cut = nsnull;
int err = hnj_hyphen_hyphenate2((HyphenDict*)mDict,
utf8.BeginReading(), utf8.Length(),
utf8hyphens.Elements(), nsnull,
&rep, &pos, &cut);
if (!err) {
// Surprisingly, hnj_hyphen_hyphenate2 converts the 'hyphens' buffer
// from utf8 code unit indexing (which would match the utf8 input
// string directly) to Unicode character indexing.
// We then need to convert this to utf16 code unit offsets for Gecko.
const char *hyphPtr = utf8hyphens.Elements();
const PRUnichar *cur = begin + wordStart;
const PRUnichar *end = begin + wordLimit;
while (cur < end) {
if (*hyphPtr & 0x01) {
aHyphens[cur - begin] = true;
}
cur++;
if (cur < end && NS_IS_LOW_SURROGATE(*cur) &&
NS_IS_HIGH_SURROGATE(*(cur-1)))
{
cur++;
}
hyphPtr++;
}
}
}
inWord = false;
}
return NS_OK;
}
NS_IMETHODIMP
nsSaveAsCharset::DoCharsetConversion(const PRUnichar *inString, char **outString)
{
if(nullptr == outString )
return NS_ERROR_NULL_POINTER;
NS_ASSERTION(outString, "invalid input");
*outString = NULL;
nsresult rv;
PRInt32 inStringLength = NS_strlen(inString); // original input string length
PRInt32 bufferLength; // allocated buffer length
PRInt32 srcLength = inStringLength;
PRInt32 dstLength;
char *dstPtr = NULL;
PRInt32 pos1, pos2;
nsresult saveResult = NS_OK; // to remember NS_ERROR_UENC_NOMAPPING
// estimate and allocate the target buffer (reserve extra memory for fallback)
rv = mEncoder->GetMaxLength(inString, inStringLength, &dstLength);
if (NS_FAILED(rv)) return rv;
bufferLength = dstLength + 512; // reserve 512 byte for fallback.
dstPtr = (char *) PR_Malloc(bufferLength);
if (NULL == dstPtr) return NS_ERROR_OUT_OF_MEMORY;
for (pos1 = 0, pos2 = 0; pos1 < inStringLength;) {
// convert from unicode
dstLength = bufferLength - pos2;
rv = mEncoder->Convert(&inString[pos1], &srcLength, &dstPtr[pos2], &dstLength);
pos1 += srcLength ? srcLength : 1;
pos2 += dstLength;
dstPtr[pos2] = '\0';
// break: this is usually the case (no error) OR unrecoverable error
if (NS_ERROR_UENC_NOMAPPING != rv) break;
// remember this happened and reset the result
saveResult = rv;
rv = NS_OK;
// finish encoder, give it a chance to write extra data like escape sequences
dstLength = bufferLength - pos2;
rv = mEncoder->Finish(&dstPtr[pos2], &dstLength);
if (NS_SUCCEEDED(rv)) {
pos2 += dstLength;
dstPtr[pos2] = '\0';
}
srcLength = inStringLength - pos1;
// do the fallback
if (!ATTR_NO_FALLBACK(mAttribute)) {
PRUint32 unMappedChar;
if (NS_IS_HIGH_SURROGATE(inString[pos1-1]) &&
inStringLength > pos1 && NS_IS_LOW_SURROGATE(inString[pos1])) {
unMappedChar = SURROGATE_TO_UCS4(inString[pos1-1], inString[pos1]);
pos1++;
} else {
unMappedChar = inString[pos1-1];
}
rv = mEncoder->GetMaxLength(inString+pos1, inStringLength-pos1, &dstLength);
if (NS_FAILED(rv))
break;
rv = HandleFallBack(unMappedChar, &dstPtr, &bufferLength, &pos2, dstLength);
if (NS_FAILED(rv))
break;
dstPtr[pos2] = '\0';
}
}
if (NS_SUCCEEDED(rv)) {
// finish encoder, give it a chance to write extra data like escape sequences
dstLength = bufferLength - pos2;
rv = mEncoder->Finish(&dstPtr[pos2], &dstLength);
if (NS_SUCCEEDED(rv)) {
pos2 += dstLength;
dstPtr[pos2] = '\0';
}
}
if (NS_FAILED(rv)) {
PR_FREEIF(dstPtr);
return rv;
}
*outString = dstPtr; // set the result string
// set error code so that the caller can do own fall back
if (NS_ERROR_UENC_NOMAPPING == saveResult) {
rv = NS_ERROR_UENC_NOMAPPING;
}
return rv;
}
bool
gfxScriptItemizer::Next(PRUint32& aRunStart, PRUint32& aRunLimit,
PRInt32& aRunScript)
{
/* if we've fallen off the end of the text, we're done */
if (scriptLimit >= textLength) {
return false;
}
SYNC_FIXUP();
scriptCode = MOZ_SCRIPT_COMMON;
for (scriptStart = scriptLimit; scriptLimit < textLength; scriptLimit += 1) {
PRUint32 ch;
PRInt32 sc;
PRInt32 pairIndex;
PRUint32 startOfChar = scriptLimit;
ch = textPtr[scriptLimit];
/*
* MODIFICATION for Gecko - clear the paired-character stack
* when we see a space character, because we cannot trust
* context outside the current "word" when doing textrun
* construction
*/
if (ch == 0x20) {
while (STACK_IS_NOT_EMPTY()) {
pop();
}
sc = MOZ_SCRIPT_COMMON;
pairIndex = -1;
} else {
/* decode UTF-16 (may be surrogate pair) */
if (NS_IS_HIGH_SURROGATE(ch) && scriptLimit < textLength - 1) {
PRUint32 low = textPtr[scriptLimit + 1];
if (NS_IS_LOW_SURROGATE(low)) {
ch = SURROGATE_TO_UCS4(ch, low);
scriptLimit += 1;
}
}
sc = mozilla::unicode::GetScriptCode(ch);
pairIndex = getPairIndex(ch);
/*
* Paired character handling:
*
* if it's an open character, push it onto the stack.
* if it's a close character, find the matching open on the
* stack, and use that script code. Any non-matching open
* characters above it on the stack will be poped.
*/
if (pairIndex >= 0) {
if ((pairIndex & 1) == 0) {
push(pairIndex, scriptCode);
} else {
PRInt32 pi = pairIndex & ~1;
while (STACK_IS_NOT_EMPTY() && TOP().pairIndex != pi) {
pop();
}
if (STACK_IS_NOT_EMPTY()) {
sc = TOP().scriptCode;
}
}
}
}
if (sameScript(scriptCode, sc)) {
if (scriptCode <= MOZ_SCRIPT_INHERITED &&
sc > MOZ_SCRIPT_INHERITED)
{
scriptCode = sc;
fixup(scriptCode);
}
/*
* if this character is a close paired character,
* pop the matching open character from the stack
*/
if (pairIndex >= 0 && (pairIndex & 1) != 0) {
pop();
}
} else {
/*
* reset scriptLimit in case it was advanced during reading a
* multiple-code-unit character
*/
scriptLimit = startOfChar;
break;
}
}
aRunStart = scriptStart;
aRunLimit = scriptLimit;
aRunScript = scriptCode;
return true;
}
void
nsHTMLContentSerializer::AppendToString(const nsAString& aStr,
nsAString& aOutputStr,
PRBool aTranslateEntities,
PRBool aIncrColumn)
{
if (mBodyOnly && !mInBody) {
return;
}
if (aIncrColumn) {
mColPos += aStr.Length();
}
if (aTranslateEntities && !mInCDATA) {
if (mFlags & (nsIDocumentEncoder::OutputEncodeBasicEntities |
nsIDocumentEncoder::OutputEncodeLatin1Entities |
nsIDocumentEncoder::OutputEncodeHTMLEntities |
nsIDocumentEncoder::OutputEncodeW3CEntities)) {
nsIParserService* parserService = nsContentUtils::GetParserService();
if (!parserService) {
NS_ERROR("Can't get parser service");
return;
}
nsReadingIterator<PRUnichar> done_reading;
aStr.EndReading(done_reading);
// for each chunk of |aString|...
PRUint32 advanceLength = 0;
nsReadingIterator<PRUnichar> iter;
const char **entityTable = mInAttribute ? kAttrEntities : kEntities;
for (aStr.BeginReading(iter);
iter != done_reading;
iter.advance(PRInt32(advanceLength))) {
PRUint32 fragmentLength = iter.size_forward();
PRUint32 lengthReplaced = 0; // the number of UTF-16 codepoints
// replaced by a particular entity
const PRUnichar* c = iter.get();
const PRUnichar* fragmentStart = c;
const PRUnichar* fragmentEnd = c + fragmentLength;
const char* entityText = nsnull;
nsCAutoString entityReplacement;
char* fullEntityText = nsnull;
advanceLength = 0;
// for each character in this chunk, check if it
// needs to be replaced
for (; c < fragmentEnd; c++, advanceLength++) {
PRUnichar val = *c;
if (val == kValNBSP) {
entityText = kEntityNBSP;
break;
}
else if ((val <= kGTVal) && (entityTable[val][0] != 0)) {
entityText = entityTable[val];
break;
} else if (val > 127 &&
((val < 256 &&
mFlags & nsIDocumentEncoder::OutputEncodeLatin1Entities) ||
mFlags & nsIDocumentEncoder::OutputEncodeHTMLEntities)) {
parserService->HTMLConvertUnicodeToEntity(val, entityReplacement);
if (!entityReplacement.IsEmpty()) {
entityText = entityReplacement.get();
break;
}
}
else if (val > 127 &&
mFlags & nsIDocumentEncoder::OutputEncodeW3CEntities &&
mEntityConverter) {
if (NS_IS_HIGH_SURROGATE(val) &&
c + 1 < fragmentEnd &&
NS_IS_LOW_SURROGATE(*(c + 1))) {
PRUint32 valUTF32 = SURROGATE_TO_UCS4(val, *(++c));
if (NS_SUCCEEDED(mEntityConverter->ConvertUTF32ToEntity(valUTF32,
nsIEntityConverter::entityW3C, &fullEntityText))) {
lengthReplaced = 2;
break;
}
else {
advanceLength++;
}
}
else if (NS_SUCCEEDED(mEntityConverter->ConvertToEntity(val,
nsIEntityConverter::entityW3C,
&fullEntityText))) {
lengthReplaced = 1;
break;
}
}
}
aOutputStr.Append(fragmentStart, advanceLength);
if (entityText) {
aOutputStr.Append(PRUnichar('&'));
AppendASCIItoUTF16(entityText, aOutputStr);
aOutputStr.Append(PRUnichar(';'));
advanceLength++;
}
// if it comes from nsIEntityConverter, it already has '&' and ';'
else if (fullEntityText) {
AppendASCIItoUTF16(fullEntityText, aOutputStr);
nsMemory::Free(fullEntityText);
advanceLength += lengthReplaced;
}
}
} else {
nsXMLContentSerializer::AppendToString(aStr, aOutputStr, aTranslateEntities, aIncrColumn);
}
return;
}
aOutputStr.Append(aStr);
}
bool
nsMathMLTokenFrame::SetTextStyle()
{
if (mContent->Tag() != nsGkAtoms::mi_)
return false;
if (!mFrames.FirstChild())
return false;
// Get the text content that we enclose and its length
nsAutoString data;
nsContentUtils::GetNodeTextContent(mContent, false, data);
PRInt32 length = data.Length();
if (!length)
return false;
nsAutoString fontstyle;
bool isSingleCharacter =
length == 1 ||
(length == 2 && NS_IS_HIGH_SURROGATE(data[0]));
if (isSingleCharacter &&
nsMathMLOperators::LookupInvariantChar(data) != eMATHVARIANT_NONE) {
// bug 65951 - a non-stylable character has its own intrinsic appearance
fontstyle.AssignLiteral("invariant");
}
else {
// Attributes override the default behavior.
nsAutoString value;
if (!(GetAttribute(mContent, mPresentationData.mstyle,
nsGkAtoms::mathvariant_, value) ||
GetAttribute(mContent, mPresentationData.mstyle,
nsGkAtoms::fontstyle_, value))) {
if (!isSingleCharacter) {
fontstyle.AssignLiteral("normal");
}
else if (length == 1 && // BMP
!nsMathMLOperators::
TransformVariantChar(data[0], eMATHVARIANT_italic).
Equals(data)) {
// Transformation exists. Try to make the BMP character look like the
// styled character using the style system until bug 114365 is resolved.
fontstyle.AssignLiteral("italic");
}
// else single character but there is no corresponding Math Alphanumeric
// Symbol character: "ignore the value of the [default] mathvariant
// attribute".
}
}
// set the _moz-math-font-style attribute without notifying that we want a reflow
if (fontstyle.IsEmpty()) {
if (mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::_moz_math_fontstyle_)) {
mContent->UnsetAttr(kNameSpaceID_None, nsGkAtoms::_moz_math_fontstyle_,
false);
return true;
}
}
else if (!mContent->AttrValueIs(kNameSpaceID_None,
nsGkAtoms::_moz_math_fontstyle_,
fontstyle, eCaseMatters)) {
mContent->SetAttr(kNameSpaceID_None, nsGkAtoms::_moz_math_fontstyle_,
fontstyle, false);
return true;
}
return false;
}
void
nsCaseTransformTextRunFactory::RebuildTextRun(nsTransformedTextRun* aTextRun,
gfxContext* aRefContext)
{
PRUint32 length = aTextRun->GetLength();
const PRUnichar* str = aTextRun->mString.BeginReading();
nsRefPtr<nsStyleContext>* styles = aTextRun->mStyles.Elements();
nsAutoString convertedString;
nsAutoTArray<bool,50> charsToMergeArray;
nsAutoTArray<bool,50> deletedCharsArray;
nsAutoTArray<nsStyleContext*,50> styleArray;
nsAutoTArray<PRUint8,50> canBreakBeforeArray;
bool mergeNeeded = false;
// Some languages have special casing conventions that differ from the
// default Unicode mappings.
// The enum values here are named for well-known exemplar languages that
// exhibit the behavior in question; multiple lang tags may map to the
// same setting here, if the behavior is shared by other languages.
enum {
eNone, // default non-lang-specific behavior
eTurkish, // preserve dotted/dotless-i distinction in uppercase
eDutch, // treat "ij" digraph as a unit for capitalization
eGreek // strip accent when uppercasing Greek vowels
} languageSpecificCasing = eNone;
const nsIAtom* lang = nsnull;
bool capitalizeDutchIJ = false;
bool prevIsLetter = false;
PRUint32 sigmaIndex = PRUint32(-1);
nsIUGenCategory::nsUGenCategory cat;
GreekCasingState greekState = kStart;
PRUint32 i;
for (i = 0; i < length; ++i) {
PRUint32 ch = str[i];
nsStyleContext* styleContext = styles[i];
PRUint8 style = mAllUppercase ? NS_STYLE_TEXT_TRANSFORM_UPPERCASE
: styleContext->GetStyleText()->mTextTransform;
int extraChars = 0;
const mozilla::unicode::MultiCharMapping *mcm;
if (NS_IS_HIGH_SURROGATE(ch) && i < length - 1 && NS_IS_LOW_SURROGATE(str[i + 1])) {
ch = SURROGATE_TO_UCS4(ch, str[i + 1]);
}
if (lang != styleContext->GetStyleFont()->mLanguage) {
lang = styleContext->GetStyleFont()->mLanguage;
if (lang == nsGkAtoms::tr || lang == nsGkAtoms::az ||
lang == nsGkAtoms::ba || lang == nsGkAtoms::crh ||
lang == nsGkAtoms::tt) {
languageSpecificCasing = eTurkish;
} else if (lang == nsGkAtoms::nl) {
languageSpecificCasing = eDutch;
} else if (lang == nsGkAtoms::el) {
languageSpecificCasing = eGreek;
greekState = kStart;
} else {
languageSpecificCasing = eNone;
}
}
switch (style) {
case NS_STYLE_TEXT_TRANSFORM_LOWERCASE:
if (languageSpecificCasing == eTurkish) {
if (ch == 'I') {
ch = LATIN_SMALL_LETTER_DOTLESS_I;
prevIsLetter = true;
sigmaIndex = PRUint32(-1);
break;
}
if (ch == LATIN_CAPITAL_LETTER_I_WITH_DOT_ABOVE) {
ch = 'i';
prevIsLetter = true;
sigmaIndex = PRUint32(-1);
break;
}
}
// Special lowercasing behavior for Greek Sigma: note that this is listed
// as context-sensitive in Unicode's SpecialCasing.txt, but is *not* a
// language-specific mapping; it applies regardless of the language of
// the element.
//
// The lowercase mapping for CAPITAL SIGMA should be to SMALL SIGMA (i.e.
// the non-final form) whenever there is a following letter, or when the
// CAPITAL SIGMA occurs in isolation (neither preceded nor followed by a
// LETTER); and to FINAL SIGMA when it is preceded by another letter but
// not followed by one.
//
// To implement the context-sensitive nature of this mapping, we keep
// track of whether the previous character was a letter. If not, CAPITAL
// SIGMA will map directly to SMALL SIGMA. If the previous character
// was a letter, CAPITAL SIGMA maps to FINAL SIGMA and we record the
// position in the converted string; if we then encounter another letter,
// that FINAL SIGMA is replaced with a standard SMALL SIGMA.
cat = mozilla::unicode::GetGenCategory(ch);
// If sigmaIndex is not -1, it marks where we have provisionally mapped
// a CAPITAL SIGMA to FINAL SIGMA; if we now find another letter, we
// need to change it to SMALL SIGMA.
if (sigmaIndex != PRUint32(-1)) {
if (cat == nsIUGenCategory::kLetter) {
convertedString.SetCharAt(GREEK_SMALL_LETTER_SIGMA, sigmaIndex);
}
}
if (ch == GREEK_CAPITAL_LETTER_SIGMA) {
// If preceding char was a letter, map to FINAL instead of SMALL,
// and note where it occurred by setting sigmaIndex; we'll change it
// to standard SMALL SIGMA later if another letter follows
if (prevIsLetter) {
ch = GREEK_SMALL_LETTER_FINAL_SIGMA;
sigmaIndex = convertedString.Length();
} else {
// CAPITAL SIGMA not preceded by a letter is unconditionally mapped
// to SMALL SIGMA
ch = GREEK_SMALL_LETTER_SIGMA;
sigmaIndex = PRUint32(-1);
}
prevIsLetter = true;
break;
}
// ignore diacritics for the purpose of contextual sigma mapping;
// otherwise, reset prevIsLetter appropriately and clear the
// sigmaIndex marker
if (cat != nsIUGenCategory::kMark) {
prevIsLetter = (cat == nsIUGenCategory::kLetter);
sigmaIndex = PRUint32(-1);
}
mcm = mozilla::unicode::SpecialLower(ch);
if (mcm) {
int j = 0;
while (j < 2 && mcm->mMappedChars[j + 1]) {
convertedString.Append(mcm->mMappedChars[j]);
++extraChars;
++j;
}
ch = mcm->mMappedChars[j];
break;
}
ch = ToLowerCase(ch);
break;
case NS_STYLE_TEXT_TRANSFORM_UPPERCASE:
if (languageSpecificCasing == eTurkish && ch == 'i') {
ch = LATIN_CAPITAL_LETTER_I_WITH_DOT_ABOVE;
break;
}
if (languageSpecificCasing == eGreek) {
ch = GreekUpperCase(ch, &greekState);
break;
}
mcm = mozilla::unicode::SpecialUpper(ch);
if (mcm) {
int j = 0;
while (j < 2 && mcm->mMappedChars[j + 1]) {
convertedString.Append(mcm->mMappedChars[j]);
++extraChars;
++j;
}
ch = mcm->mMappedChars[j];
break;
}
ch = ToUpperCase(ch);
break;
case NS_STYLE_TEXT_TRANSFORM_CAPITALIZE:
if (capitalizeDutchIJ && ch == 'j') {
ch = 'J';
capitalizeDutchIJ = false;
break;
}
capitalizeDutchIJ = false;
if (i < aTextRun->mCapitalize.Length() && aTextRun->mCapitalize[i]) {
if (languageSpecificCasing == eTurkish && ch == 'i') {
ch = LATIN_CAPITAL_LETTER_I_WITH_DOT_ABOVE;
break;
}
if (languageSpecificCasing == eDutch && ch == 'i') {
ch = 'I';
capitalizeDutchIJ = true;
break;
}
mcm = mozilla::unicode::SpecialTitle(ch);
if (mcm) {
int j = 0;
while (j < 2 && mcm->mMappedChars[j + 1]) {
convertedString.Append(mcm->mMappedChars[j]);
++extraChars;
++j;
}
ch = mcm->mMappedChars[j];
break;
}
ch = ToTitleCase(ch);
}
break;
default:
break;
}
if (ch == PRUint32(-1)) {
deletedCharsArray.AppendElement(true);
mergeNeeded = true;
} else {
deletedCharsArray.AppendElement(false);
charsToMergeArray.AppendElement(false);
styleArray.AppendElement(styleContext);
canBreakBeforeArray.AppendElement(aTextRun->CanBreakLineBefore(i));
if (IS_IN_BMP(ch)) {
convertedString.Append(ch);
} else {
convertedString.Append(H_SURROGATE(ch));
convertedString.Append(L_SURROGATE(ch));
++i;
deletedCharsArray.AppendElement(true); // not exactly deleted, but the
// trailing surrogate is skipped
++extraChars;
}
while (extraChars-- > 0) {
mergeNeeded = true;
charsToMergeArray.AppendElement(true);
styleArray.AppendElement(styleContext);
canBreakBeforeArray.AppendElement(false);
}
}
}
PRUint32 flags;
gfxTextRunFactory::Parameters innerParams =
GetParametersForInner(aTextRun, &flags, aRefContext);
gfxFontGroup* fontGroup = aTextRun->GetFontGroup();
nsAutoPtr<nsTransformedTextRun> transformedChild;
nsAutoPtr<gfxTextRun> cachedChild;
gfxTextRun* child;
if (mInnerTransformingTextRunFactory) {
transformedChild = mInnerTransformingTextRunFactory->MakeTextRun(
convertedString.BeginReading(), convertedString.Length(),
&innerParams, fontGroup, flags, styleArray.Elements(), false);
child = transformedChild.get();
} else {
cachedChild = fontGroup->MakeTextRun(
convertedString.BeginReading(), convertedString.Length(),
&innerParams, flags);
child = cachedChild.get();
}
if (!child)
return;
// Copy potential linebreaks into child so they're preserved
// (and also child will be shaped appropriately)
NS_ASSERTION(convertedString.Length() == canBreakBeforeArray.Length(),
"Dropped characters or break-before values somewhere!");
child->SetPotentialLineBreaks(0, canBreakBeforeArray.Length(),
canBreakBeforeArray.Elements(), aRefContext);
if (transformedChild) {
transformedChild->FinishSettingProperties(aRefContext);
}
if (mergeNeeded) {
// Now merge multiple characters into one multi-glyph character as required
// and deal with skipping deleted accent chars
NS_ASSERTION(charsToMergeArray.Length() == child->GetLength(),
"source length mismatch");
NS_ASSERTION(deletedCharsArray.Length() == aTextRun->GetLength(),
"destination length mismatch");
MergeCharactersInTextRun(aTextRun, child, charsToMergeArray.Elements(),
deletedCharsArray.Elements());
} else {
// No merging to do, so just copy; this produces a more optimized textrun.
// We can't steal the data because the child may be cached and stealing
// the data would break the cache.
aTextRun->ResetGlyphRuns();
aTextRun->CopyGlyphDataFrom(child, 0, child->GetLength(), 0);
}
}
void
nsFontVariantTextRunFactory::RebuildTextRun(nsTransformedTextRun* aTextRun,
gfxContext* aRefContext)
{
gfxFontGroup* fontGroup = aTextRun->GetFontGroup();
gfxFontStyle fontStyle = *fontGroup->GetStyle();
fontStyle.size *= 0.8;
nsRefPtr<gfxFontGroup> smallFont = fontGroup->Copy(&fontStyle);
if (!smallFont)
return;
PRUint32 flags;
gfxTextRunFactory::Parameters innerParams =
GetParametersForInner(aTextRun, &flags, aRefContext);
PRUint32 length = aTextRun->GetLength();
const PRUnichar* str = aTextRun->mString.BeginReading();
nsRefPtr<nsStyleContext>* styles = aTextRun->mStyles.Elements();
// Create a textrun so we can check cluster-start properties
nsAutoPtr<gfxTextRun> inner(fontGroup->MakeTextRun(str, length, &innerParams, flags));
if (!inner.get())
return;
nsCaseTransformTextRunFactory uppercaseFactory(nsnull, true);
aTextRun->ResetGlyphRuns();
PRUint32 runStart = 0;
nsAutoTArray<nsStyleContext*,50> styleArray;
nsAutoTArray<PRUint8,50> canBreakBeforeArray;
enum RunCaseState {
kUpperOrCaseless, // will be untouched by font-variant:small-caps
kLowercase, // will be uppercased and reduced
kSpecialUpper // specials: don't shrink, but apply uppercase mapping
};
RunCaseState runCase = kUpperOrCaseless;
// Note that this loop runs from 0 to length *inclusive*, so the last
// iteration is in effect beyond the end of the input text, to give a
// chance to finish the last casing run we've found.
// The last iteration, when i==length, must not attempt to look at the
// character position [i] or the style data for styles[i], as this would
// be beyond the valid length of the textrun or its style array.
for (PRUint32 i = 0; i <= length; ++i) {
RunCaseState chCase = kUpperOrCaseless;
// Unless we're at the end, figure out what treatment the current
// character will need.
if (i < length) {
nsStyleContext* styleContext = styles[i];
// Characters that aren't the start of a cluster are ignored here. They
// get added to whatever lowercase/non-lowercase run we're in.
if (!inner->IsClusterStart(i)) {
chCase = runCase;
} else {
if (styleContext->GetStyleFont()->mFont.variant == NS_STYLE_FONT_VARIANT_SMALL_CAPS) {
PRUint32 ch = str[i];
if (NS_IS_HIGH_SURROGATE(ch) && i < length - 1 && NS_IS_LOW_SURROGATE(str[i + 1])) {
ch = SURROGATE_TO_UCS4(ch, str[i + 1]);
}
PRUint32 ch2 = ToUpperCase(ch);
if (ch != ch2 || mozilla::unicode::SpecialUpper(ch)) {
chCase = kLowercase;
} else if (styleContext->GetStyleFont()->mLanguage == nsGkAtoms::el) {
// In Greek, check for characters that will be modified by the
// GreekUpperCase mapping - this catches accented capitals where
// the accent is to be removed (bug 307039). These are handled by
// a transformed child run using the full-size font.
GreekCasingState state = kStart; // don't need exact context here
ch2 = GreekUpperCase(ch, &state);
if (ch != ch2) {
chCase = kSpecialUpper;
}
}
} else {
// Don't transform the character! I.e., pretend that it's not lowercase
}
}
}
// At the end of the text, or when the current character needs different
// casing treatment from the current run, finish the run-in-progress
// and prepare to accumulate a new run.
// Note that we do not look at any source data for offset [i] here,
// as that would be invalid in the case where i==length.
if ((i == length || runCase != chCase) && runStart < i) {
nsAutoPtr<nsTransformedTextRun> transformedChild;
nsAutoPtr<gfxTextRun> cachedChild;
gfxTextRun* child;
switch (runCase) {
case kUpperOrCaseless:
cachedChild =
fontGroup->MakeTextRun(str + runStart, i - runStart, &innerParams,
flags);
child = cachedChild.get();
break;
case kLowercase:
transformedChild =
uppercaseFactory.MakeTextRun(str + runStart, i - runStart,
&innerParams, smallFont, flags,
styleArray.Elements(), false);
child = transformedChild;
break;
case kSpecialUpper:
transformedChild =
uppercaseFactory.MakeTextRun(str + runStart, i - runStart,
&innerParams, fontGroup, flags,
styleArray.Elements(), false);
child = transformedChild;
break;
}
if (!child)
return;
// Copy potential linebreaks into child so they're preserved
// (and also child will be shaped appropriately)
NS_ASSERTION(canBreakBeforeArray.Length() == i - runStart,
"lost some break-before values?");
child->SetPotentialLineBreaks(0, canBreakBeforeArray.Length(),
canBreakBeforeArray.Elements(), aRefContext);
if (transformedChild) {
transformedChild->FinishSettingProperties(aRefContext);
}
aTextRun->CopyGlyphDataFrom(child, 0, child->GetLength(), runStart);
runStart = i;
styleArray.Clear();
canBreakBeforeArray.Clear();
}
if (i < length) {
runCase = chCase;
styleArray.AppendElement(styles[i]);
canBreakBeforeArray.AppendElement(aTextRun->CanBreakLineBefore(i));
}
}
}
