static void utf16ToUcs4(const nsAString& in, PRUint32 *out, PRUint32 outBufLen, PRUint32 *outLen)
{
PRUint32 i = 0;
nsAString::const_iterator start, end;
in.BeginReading(start);
in.EndReading(end);
while (start != end) {
PRUnichar curChar;
curChar= *start++;
if (start != end &&
NS_IS_HIGH_SURROGATE(curChar) &&
NS_IS_LOW_SURROGATE(*start)) {
out[i] = SURROGATE_TO_UCS4(curChar, *start);
++start;
}
else
out[i] = curChar;
i++;
if (i >= outBufLen) {
NS_ERROR("input too big, the result truncated");
out[outBufLen-1] = (PRUint32)'\0';
*outLen = outBufLen-1;
return;
}
}
out[i] = (PRUint32)'\0';
*outLen = i;
}
static void
SetupCapitalization(const PRUnichar* aWord, uint32_t aLength,
bool* aCapitalization)
{
// Capitalize the first alphanumeric character after a space or start
// of the word.
// The only space character a word can contain is NBSP.
bool capitalizeNextChar = true;
for (uint32_t i = 0; i < aLength; ++i) {
uint32_t ch = aWord[i];
if (capitalizeNextChar) {
if (NS_IS_HIGH_SURROGATE(ch) && i + 1 < aLength &&
NS_IS_LOW_SURROGATE(aWord[i + 1])) {
ch = SURROGATE_TO_UCS4(ch, aWord[i + 1]);
}
if (nsContentUtils::IsAlphanumeric(ch)) {
aCapitalization[i] = true;
capitalizeNextChar = false;
}
if (!IS_IN_BMP(ch)) {
++i;
}
}
if (ch == 0xA0 /*NBSP*/) {
capitalizeNextChar = true;
}
}
}
/**
* Various methods for returning the directionality of a string using the
* first-strong algorithm defined in http://unicode.org/reports/tr9/#P2
*
* @param[out] aFirstStrong the offset to the first character in the string with
* strong directionality, or UINT32_MAX if there is none (return
value is eDir_NotSet).
* @return the directionality of the string
*/
static Directionality
GetDirectionFromText(const PRUnichar* aText, const uint32_t aLength,
uint32_t* aFirstStrong = nullptr)
{
const PRUnichar* start = aText;
const PRUnichar* end = aText + aLength;
while (start < end) {
uint32_t current = start - aText;
uint32_t ch = *start++;
if (NS_IS_HIGH_SURROGATE(ch) &&
start < end &&
NS_IS_LOW_SURROGATE(*start)) {
ch = SURROGATE_TO_UCS4(ch, *start++);
}
Directionality dir = GetDirectionFromChar(ch);
if (dir != eDir_NotSet) {
if (aFirstStrong) {
*aFirstStrong = current;
}
return dir;
}
}
if (aFirstStrong) {
*aFirstStrong = UINT32_MAX;
}
return eDir_NotSet;
}
NS_IMETHODIMP
nsEntityConverter::ConvertToEntities(const PRUnichar *inString, PRUint32 entityVersion, PRUnichar **_retval)
{
NS_ASSERTION(inString, "null ptr- inString");
NS_ASSERTION(_retval, "null ptr- _retval");
if((nsnull == inString) || (nsnull == _retval))
return NS_ERROR_NULL_POINTER;
*_retval = NULL;
const PRUnichar *entity = NULL;
nsString outString;
// per character look for the entity
PRUint32 len = NS_strlen(inString);
for (PRUint32 i = 0; i < len; i++) {
nsAutoString key(NS_LITERAL_STRING("entity."));
if (NS_IS_HIGH_SURROGATE(inString[i]) &&
i + 2 < len &&
NS_IS_LOW_SURROGATE(inString[i + 1])) {
key.AppendInt(SURROGATE_TO_UCS4(inString[i], inString[i+1]), 10);
++i;
}
else {
key.AppendInt(inString[i],10);
}
nsXPIDLString value;
entity = NULL;
for (PRUint32 mask = 1, mask2 = 0xFFFFFFFFL; (0!=(entityVersion & mask2)); mask<<=1, mask2<<=1) {
if (0 == (entityVersion & mask))
continue;
nsIStringBundle* entities = GetVersionBundleInstance(entityVersion & mask);
NS_ASSERTION(entities, "Cannot get the property file");
if (NULL == entities)
continue;
nsresult rv = entities->GetStringFromName(key.get(),
getter_Copies(value));
if (NS_SUCCEEDED(rv)) {
entity = value.get();
break;
}
}
if (NULL != entity) {
outString.Append(entity);
}
else {
outString.Append(&inString[i], 1);
}
}
*_retval = ToNewUnicode(outString);
if (NULL == *_retval)
return NS_ERROR_OUT_OF_MEMORY;
return NS_OK;
}
int32_t
CaseInsensitiveCompare(const char16_t *a,
const char16_t *b,
uint32_t len)
{
NS_ASSERTION(a && b, "Do not pass in invalid pointers!");
if (len) {
do {
uint32_t c1 = *a++;
uint32_t c2 = *b++;
// Unfortunately, we need to check for surrogates BEFORE we check
// for equality, because we could have identical high surrogates
// but non-identical characters, so we can't just skip them
// If c1 isn't a surrogate, we don't bother to check c2;
// in the case where it _is_ a surrogate, we're definitely going to get
// a mismatch, and don't need to interpret and lowercase it
if (NS_IS_HIGH_SURROGATE(c1) && len > 1 && NS_IS_LOW_SURROGATE(*a)) {
c1 = SURROGATE_TO_UCS4(c1, *a++);
if (NS_IS_HIGH_SURROGATE(c2) && NS_IS_LOW_SURROGATE(*b)) {
c2 = SURROGATE_TO_UCS4(c2, *b++);
}
// If c2 wasn't a surrogate, decrementing len means we'd stop
// short of the end of string b, but that doesn't actually matter
// because we're going to find a mismatch and return early
--len;
}
if (c1 != c2) {
c1 = ToLowerCase_inline(c1);
c2 = ToLowerCase_inline(c2);
if (c1 != c2) {
if (c1 < c2) {
return -1;
}
return 1;
}
}
} while (--len != 0);
}
return 0;
}
uint32_t UTF32CodepointFromTestcase(testcaseLine* testLine)
{
if (!IS_SURROGATE(testLine->c1[0]))
return testLine->c1[0];
NS_ASSERTION(NS_IS_HIGH_SURROGATE(testLine->c1[0]) &&
NS_IS_LOW_SURROGATE(testLine->c1[1]),
"Test data neither in BMP nor legal surrogate pair");
return SURROGATE_TO_UCS4(testLine->c1[0], testLine->c1[1]);
}
NS_IMETHODIMP
nsEntityConverter::ConvertToEntities(const char16_t *inString, uint32_t entityVersion, char16_t **_retval)
{
NS_ENSURE_ARG_POINTER(inString);
NS_ENSURE_ARG_POINTER(_retval);
*_retval = nullptr;
nsString outString;
// per character look for the entity
uint32_t len = NS_strlen(inString);
for (uint32_t i = 0; i < len; i++) {
nsAutoString key(NS_LITERAL_STRING("entity."));
if (NS_IS_HIGH_SURROGATE(inString[i]) && i + 2 < len && NS_IS_LOW_SURROGATE(inString[i + 1])) {
key.AppendInt(SURROGATE_TO_UCS4(inString[i], inString[i+1]), 10);
++i;
} else {
key.AppendInt(inString[i],10);
}
nsXPIDLString value;
const char16_t *entity = nullptr;
for (uint32_t mask = 1, mask2 = 0xFFFFFFFFL; (0!=(entityVersion & mask2)); mask<<=1, mask2<<=1) {
if (0 == (entityVersion & mask)) {
continue;
}
nsIStringBundle* entities = GetVersionBundleInstance(entityVersion & mask);
NS_ASSERTION(entities, "Cannot get the property file");
if (!entities) {
continue;
}
nsresult rv = entities->GetStringFromName(key.get(), getter_Copies(value));
if (NS_SUCCEEDED(rv)) {
entity = value.get();
break;
}
}
if (entity) {
outString.Append(entity);
} else {
outString.Append(&inString[i], 1);
}
}
*_retval = ToNewUnicode(outString);
return NS_OK;
}
PRBool HasRTLChars(nsAString& aString)
{
PRInt32 length = aString.Length();
for (PRInt32 i = 0; i < length; i++) {
if ((UCS2_CHAR_IS_BIDI(aString.CharAt(i)) ) ||
((NS_IS_HIGH_SURROGATE(aString.CharAt(i))) &&
(++i < length) &&
(NS_IS_LOW_SURROGATE(aString.CharAt(i))) &&
(UTF32_CHAR_IS_BIDI(SURROGATE_TO_UCS4(aString.CharAt(i-1),
aString.CharAt(i)))))) {
return PR_TRUE;
}
}
return PR_FALSE;
}
void
ToLowerCase(const PRUnichar *aIn, PRUnichar *aOut, PRUint32 aLen)
{
for (PRUint32 i = 0; i < aLen; i++) {
PRUint32 ch = aIn[i];
if (NS_IS_HIGH_SURROGATE(ch) && i < aLen - 1 &&
NS_IS_LOW_SURROGATE(aIn[i + 1])) {
ch = mozilla::unicode::GetLowercase(SURROGATE_TO_UCS4(ch, aIn[i + 1]));
NS_ASSERTION(!IS_IN_BMP(ch), "case mapping crossed BMP/SMP boundary!");
aOut[i++] = H_SURROGATE(ch);
aOut[i] = L_SURROGATE(ch);
continue;
}
aOut[i] = ToLowerCase(ch);
}
}
void
ToUpperCase(const char16_t *aIn, char16_t *aOut, uint32_t aLen)
{
for (uint32_t i = 0; i < aLen; i++) {
uint32_t ch = aIn[i];
if (NS_IS_HIGH_SURROGATE(ch) && i < aLen - 1 &&
NS_IS_LOW_SURROGATE(aIn[i + 1])) {
ch = mozilla::unicode::GetUppercase(SURROGATE_TO_UCS4(ch, aIn[i + 1]));
NS_ASSERTION(!IS_IN_BMP(ch), "case mapping crossed BMP/SMP boundary!");
aOut[i++] = H_SURROGATE(ch);
aOut[i] = L_SURROGATE(ch);
continue;
}
aOut[i] = ToUpperCase(ch);
}
}
// Get the Unicode character at index aPos in the string, and update aPos to
// point to the next char (i.e. advance by one or two, depending whether we
// found a surrogate pair).
// This will assert (and return junk) if the string is not well-formed UTF16.
// However, this is only used to process an attribute that comes from the
// SVG-glyph XML document, and is not exposed to modification via the DOM,
// so it must be well-formed UTF16 data (no unpaired surrogate codepoints)
// unless our Unicode handling is seriously broken.
static uint32_t
NextUSV(const nsAString& aString, uint32_t& aPos)
{
mozilla::DebugOnly<uint32_t> len = aString.Length();
NS_ASSERTION(aPos < len, "already at end of string");
uint32_t c1 = aString[aPos++];
if (NS_IS_HIGH_SURROGATE(c1)) {
NS_ASSERTION(aPos < len, "trailing high surrogate");
uint32_t c2 = aString[aPos++];
NS_ASSERTION(NS_IS_LOW_SURROGATE(c2), "isolated high surrogate");
return SURROGATE_TO_UCS4(c1, c2);
}
NS_ASSERTION(!NS_IS_LOW_SURROGATE(c1), "isolated low surrogate");
return c1;
}
gint
nsFreeTypeFont::GetWidth(const PRUnichar* aString, PRUint32 aLength)
{
FT_UInt glyph_index;
FT_Glyph glyph;
FT_Pos origin_x = 0;
// get the face/size from the FreeType cache
FT_Face face = getFTFace();
NS_ASSERTION(face, "failed to get face/size");
if (!face)
return 0;
FTC_Image_Cache icache;
mFt2->GetImageCache(&icache);
if (!icache)
return 0;
PRUint32 i, extraSurrogateLength;
for (i=0; i<aLength; i+=1+extraSurrogateLength) {
extraSurrogateLength=0;
FT_ULong code_point = aString[i];
if(i<aLength-1 && IS_HIGH_SURROGATE(code_point) && IS_LOW_SURROGATE(aString[i+1])) {
// if surrogate, make UCS4 code point from high aString[i] surrogate and
// low surrogate aString[i+1]
code_point = SURROGATE_TO_UCS4(code_point, aString[i+1]);
// skip aString[i+1], it is already used as low surrogate
extraSurrogateLength = 1;
}
mFt2->GetCharIndex((FT_Face)face, code_point, &glyph_index);
nsresult rv;
rv = mFt2->ImageCacheLookup(icache, &mImageDesc, glyph_index, &glyph);
NS_ASSERTION(NS_SUCCEEDED(rv),"error loading glyph");
if (NS_FAILED(rv)) {
origin_x += face->size->metrics.x_ppem/2 + 2;
continue;
}
origin_x += FT_16_16_TO_REG(glyph->advance.x);
}
return origin_x;
}
// To save time we only do this when we really want to know, not during
// every allocation
void
nsTextFragment::UpdateBidiFlag(const char16_t* aBuffer, uint32_t aLength)
{
if (mState.mIs2b && !mState.mIsBidi) {
const char16_t* cp = aBuffer;
const char16_t* end = cp + aLength;
while (cp < end) {
char16_t ch1 = *cp++;
uint32_t utf32Char = ch1;
if (NS_IS_HIGH_SURROGATE(ch1) &&
cp < end &&
NS_IS_LOW_SURROGATE(*cp)) {
char16_t ch2 = *cp++;
utf32Char = SURROGATE_TO_UCS4(ch1, ch2);
}
if (UTF32_CHAR_IS_BIDI(utf32Char) || IsBidiControl(utf32Char)) {
mState.mIsBidi = true;
break;
}
}
}
}
// To save time we only do this when we really want to know, not during
// every allocation
void
nsTextFragment::UpdateBidiFlag(const PRUnichar* aBuffer, PRUint32 aLength)
{
if (mState.mIs2b && !mState.mIsBidi) {
const PRUnichar* cp = aBuffer;
const PRUnichar* end = cp + aLength;
while (cp < end) {
PRUnichar ch1 = *cp++;
PRUint32 utf32Char = ch1;
if (NS_IS_HIGH_SURROGATE(ch1) &&
cp < end &&
NS_IS_LOW_SURROGATE(*cp)) {
PRUnichar ch2 = *cp++;
utf32Char = SURROGATE_TO_UCS4(ch1, ch2);
}
if (UTF32_CHAR_IS_BIDI(utf32Char) || IS_BIDI_CONTROL_CHAR(utf32Char)) {
mState.mIsBidi = PR_TRUE;
break;
}
}
}
}
void
gfxPlatform::SetupClusterBoundaries(gfxTextRun *aTextRun, const PRUnichar *aString)
{
if (aTextRun->GetFlags() & gfxTextRunFactory::TEXT_IS_8BIT) {
// 8-bit text doesn't have clusters.
// XXX is this true in all languages???
// behdad: don't think so. Czech for example IIRC has a
// 'ch' grapheme.
return;
}
nsIUGenCategory* gc = GetGenCategory();
if (!gc) {
NS_WARNING("No Unicode category service: cannot determine clusters");
return;
}
PRUint32 i, length = aTextRun->GetLength();
for (i = 0; i < length; ++i) {
PRBool surrogatePair = PR_FALSE;
PRUint32 ch = aString[i];
if (NS_IS_HIGH_SURROGATE(ch) &&
i < length - 1 && NS_IS_LOW_SURROGATE(aString[i+1])) {
ch = SURROGATE_TO_UCS4(ch, aString[i+1]);
surrogatePair = PR_TRUE;
}
if (i > 0 && gc->Get(ch) == nsIUGenCategory::kMark) {
gfxTextRun::CompressedGlyph g;
aTextRun->SetGlyphs(i, g.SetComplex(PR_FALSE, PR_TRUE, 0), nsnull);
}
if (surrogatePair) {
++i;
gfxTextRun::CompressedGlyph g;
aTextRun->SetGlyphs(i, g.SetComplex(PR_FALSE, PR_TRUE, 0), nsnull);
}
}
}
bool
nsCaseTransformTextRunFactory::TransformString(
const nsAString& aString,
nsString& aConvertedString,
bool aAllUppercase,
const nsIAtom* aLanguage,
nsTArray<bool>& aCharsToMergeArray,
nsTArray<bool>& aDeletedCharsArray,
nsTransformedTextRun* aTextRun,
nsTArray<uint8_t>* aCanBreakBeforeArray,
nsTArray<nsStyleContext*>* aStyleArray)
{
NS_PRECONDITION(!aTextRun || (aCanBreakBeforeArray && aStyleArray),
"either none or all three optional parameters required");
uint32_t length = aString.Length();
const char16_t* str = aString.BeginReading();
bool mergeNeeded = false;
bool capitalizeDutchIJ = false;
bool prevIsLetter = false;
bool ntPrefix = false; // true immediately after a word-initial 'n' or 't'
// when doing Irish lowercasing
uint32_t sigmaIndex = uint32_t(-1);
nsIUGenCategory::nsUGenCategory cat;
uint8_t style = aAllUppercase ? NS_STYLE_TEXT_TRANSFORM_UPPERCASE : 0;
const nsIAtom* lang = aLanguage;
LanguageSpecificCasingBehavior languageSpecificCasing = GetCasingFor(lang);
mozilla::GreekCasing::State greekState;
mozilla::IrishCasing::State irishState;
uint32_t irishMark = uint32_t(-1); // location of possible prefix letter(s)
for (uint32_t i = 0; i < length; ++i) {
uint32_t ch = str[i];
nsStyleContext* styleContext;
if (aTextRun) {
styleContext = aTextRun->mStyles[i];
style = aAllUppercase ? NS_STYLE_TEXT_TRANSFORM_UPPERCASE :
styleContext->StyleText()->mTextTransform;
if (lang != styleContext->StyleFont()->mLanguage) {
lang = styleContext->StyleFont()->mLanguage;
languageSpecificCasing = GetCasingFor(lang);
greekState.Reset();
irishState.Reset();
irishMark = uint32_t(-1);
}
}
int extraChars = 0;
const mozilla::unicode::MultiCharMapping *mcm;
bool inhibitBreakBefore = false; // have we just deleted preceding hyphen?
if (NS_IS_HIGH_SURROGATE(ch) && i < length - 1 &&
NS_IS_LOW_SURROGATE(str[i + 1])) {
ch = SURROGATE_TO_UCS4(ch, str[i + 1]);
}
switch (style) {
case NS_STYLE_TEXT_TRANSFORM_LOWERCASE:
if (languageSpecificCasing == eLSCB_Turkish) {
if (ch == 'I') {
ch = LATIN_SMALL_LETTER_DOTLESS_I;
prevIsLetter = true;
sigmaIndex = uint32_t(-1);
break;
}
if (ch == LATIN_CAPITAL_LETTER_I_WITH_DOT_ABOVE) {
ch = 'i';
prevIsLetter = true;
sigmaIndex = uint32_t(-1);
break;
}
}
cat = mozilla::unicode::GetGenCategory(ch);
if (languageSpecificCasing == eLSCB_Irish &&
cat == nsIUGenCategory::kLetter) {
// See bug 1018805 for Irish lowercasing requirements
if (!prevIsLetter && (ch == 'n' || ch == 't')) {
ntPrefix = true;
} else {
if (ntPrefix && mozilla::IrishCasing::IsUpperVowel(ch)) {
aConvertedString.Append('-');
++extraChars;
}
ntPrefix = false;
}
} else {
ntPrefix = false;
}
// 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.
// 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 != uint32_t(-1)) {
if (cat == nsIUGenCategory::kLetter) {
aConvertedString.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 = aConvertedString.Length();
} else {
// CAPITAL SIGMA not preceded by a letter is unconditionally mapped
// to SMALL SIGMA
ch = GREEK_SMALL_LETTER_SIGMA;
sigmaIndex = uint32_t(-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 = uint32_t(-1);
}
mcm = mozilla::unicode::SpecialLower(ch);
if (mcm) {
int j = 0;
while (j < 2 && mcm->mMappedChars[j + 1]) {
aConvertedString.Append(mcm->mMappedChars[j]);
++extraChars;
++j;
}
ch = mcm->mMappedChars[j];
break;
}
ch = ToLowerCase(ch);
break;
case NS_STYLE_TEXT_TRANSFORM_UPPERCASE:
if (languageSpecificCasing == eLSCB_Turkish && ch == 'i') {
ch = LATIN_CAPITAL_LETTER_I_WITH_DOT_ABOVE;
break;
}
if (languageSpecificCasing == eLSCB_Greek) {
ch = mozilla::GreekCasing::UpperCase(ch, greekState);
break;
}
if (languageSpecificCasing == eLSCB_Irish) {
bool mark;
uint8_t action;
ch = mozilla::IrishCasing::UpperCase(ch, irishState, mark, action);
if (mark) {
irishMark = aConvertedString.Length();
break;
} else if (action) {
nsString& str = aConvertedString; // shorthand
switch (action) {
case 1:
// lowercase a single prefix letter
NS_ASSERTION(str.Length() > 0 && irishMark < str.Length(),
"bad irishMark!");
str.SetCharAt(ToLowerCase(str[irishMark]), irishMark);
irishMark = uint32_t(-1);
break;
case 2:
// lowercase two prefix letters (immediately before current pos)
NS_ASSERTION(str.Length() >= 2 && irishMark == str.Length() - 2,
"bad irishMark!");
str.SetCharAt(ToLowerCase(str[irishMark]), irishMark);
str.SetCharAt(ToLowerCase(str[irishMark + 1]), irishMark + 1);
irishMark = uint32_t(-1);
break;
case 3:
// lowercase one prefix letter, and delete following hyphen
// (which must be the immediately-preceding char)
NS_ASSERTION(str.Length() >= 2 && irishMark == str.Length() - 2,
"bad irishMark!");
str.Replace(irishMark, 2, ToLowerCase(str[irishMark]));
aDeletedCharsArray[irishMark + 1] = true;
// Remove the trailing entries (corresponding to the deleted hyphen)
// from the auxiliary arrays.
aCharsToMergeArray.SetLength(aCharsToMergeArray.Length() - 1);
if (aTextRun) {
aStyleArray->SetLength(aStyleArray->Length() - 1);
aCanBreakBeforeArray->SetLength(aCanBreakBeforeArray->Length() - 1);
inhibitBreakBefore = true;
}
mergeNeeded = true;
irishMark = uint32_t(-1);
break;
}
// ch has been set to the uppercase for current char;
// No need to check for SpecialUpper here as none of the characters
// that could trigger an Irish casing action have special mappings.
break;
}
// If we didn't have any special action to perform, fall through
// to check for special uppercase (ß)
}
mcm = mozilla::unicode::SpecialUpper(ch);
if (mcm) {
int j = 0;
while (j < 2 && mcm->mMappedChars[j + 1]) {
aConvertedString.Append(mcm->mMappedChars[j]);
++extraChars;
++j;
}
ch = mcm->mMappedChars[j];
break;
}
ch = ToUpperCase(ch);
break;
case NS_STYLE_TEXT_TRANSFORM_CAPITALIZE:
if (aTextRun) {
if (capitalizeDutchIJ && ch == 'j') {
ch = 'J';
capitalizeDutchIJ = false;
break;
}
capitalizeDutchIJ = false;
if (i < aTextRun->mCapitalize.Length() && aTextRun->mCapitalize[i]) {
if (languageSpecificCasing == eLSCB_Turkish && ch == 'i') {
ch = LATIN_CAPITAL_LETTER_I_WITH_DOT_ABOVE;
break;
}
if (languageSpecificCasing == eLSCB_Dutch && ch == 'i') {
ch = 'I';
capitalizeDutchIJ = true;
break;
}
mcm = mozilla::unicode::SpecialTitle(ch);
if (mcm) {
int j = 0;
while (j < 2 && mcm->mMappedChars[j + 1]) {
aConvertedString.Append(mcm->mMappedChars[j]);
++extraChars;
++j;
}
ch = mcm->mMappedChars[j];
break;
}
ch = ToTitleCase(ch);
}
}
break;
case NS_STYLE_TEXT_TRANSFORM_FULLWIDTH:
ch = mozilla::unicode::GetFullWidth(ch);
break;
default:
break;
}
if (ch == uint32_t(-1)) {
aDeletedCharsArray.AppendElement(true);
mergeNeeded = true;
} else {
aDeletedCharsArray.AppendElement(false);
aCharsToMergeArray.AppendElement(false);
if (aTextRun) {
aStyleArray->AppendElement(styleContext);
aCanBreakBeforeArray->AppendElement(inhibitBreakBefore ? false :
aTextRun->CanBreakLineBefore(i));
}
if (IS_IN_BMP(ch)) {
aConvertedString.Append(ch);
} else {
aConvertedString.Append(H_SURROGATE(ch));
aConvertedString.Append(L_SURROGATE(ch));
++i;
aDeletedCharsArray.AppendElement(true); // not exactly deleted, but the
// trailing surrogate is skipped
++extraChars;
}
while (extraChars-- > 0) {
mergeNeeded = true;
aCharsToMergeArray.AppendElement(true);
if (aTextRun) {
aStyleArray->AppendElement(styleContext);
aCanBreakBeforeArray->AppendElement(false);
}
}
}
}
return mergeNeeded;
}
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 PR_FALSE;
}
SYNC_FIXUP();
scriptCode = HB_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 = HB_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 = gfxUnicodeProperties::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 <= HB_SCRIPT_INHERITED && sc > HB_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 PR_TRUE;
}
void
nsCaseTransformTextRunFactory::RebuildTextRun(nsTransformedTextRun* aTextRun,
gfxContext* aRefContext)
{
uint32_t 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<uint8_t,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 = nullptr;
bool capitalizeDutchIJ = false;
bool prevIsLetter = false;
uint32_t sigmaIndex = uint32_t(-1);
nsIUGenCategory::nsUGenCategory cat;
GreekCasingState greekState = kStart;
uint32_t i;
for (i = 0; i < length; ++i) {
uint32_t ch = str[i];
nsStyleContext* styleContext = styles[i];
uint8_t style = mAllUppercase ? NS_STYLE_TEXT_TRANSFORM_UPPERCASE
: styleContext->StyleText()->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->StyleFont()->mLanguage) {
lang = styleContext->StyleFont()->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 = uint32_t(-1);
break;
}
if (ch == LATIN_CAPITAL_LETTER_I_WITH_DOT_ABOVE) {
ch = 'i';
prevIsLetter = true;
sigmaIndex = uint32_t(-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 != uint32_t(-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 = uint32_t(-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 = uint32_t(-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;
case NS_STYLE_TEXT_TRANSFORM_FULLWIDTH:
ch = mozilla::unicode::GetFullWidth(ch);
break;
default:
break;
}
if (ch == uint32_t(-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);
}
}
}
uint32_t 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);
}
}
static nsresult
mdn_normalize(bool do_composition, bool compat,
const nsAString& aSrcStr, nsAString& aToStr)
{
workbuf_t wb;
nsresult r = NS_OK;
/*
* Initialize working buffer.
*/
workbuf_init(&wb);
nsAString::const_iterator start, end;
aSrcStr.BeginReading(start);
aSrcStr.EndReading(end);
while (start != end) {
PRUint32 c;
PRUnichar curChar;
//assert(wb.cur == wb.last);
/*
* Get one character from 'from'.
*/
curChar= *start++;
if (NS_IS_HIGH_SURROGATE(curChar) && start != end && NS_IS_LOW_SURROGATE(*(start)) ) {
c = SURROGATE_TO_UCS4(curChar, *start);
++start;
} else {
c = curChar;
}
/*
* Decompose it.
*/
if ((r = decompose(&wb, c, compat)) != NS_OK)
break;
/*
* Get canonical class.
*/
get_class(&wb);
/*
* Reorder & compose.
*/
for (; wb.cur < wb.last; wb.cur++) {
if (wb.cur == 0) {
continue;
} else if (wb.cclass[wb.cur] > 0) {
/*
* This is not a starter. Try reordering.
* Note that characters up to it are
* already in canonical order.
*/
reorder(&wb);
continue;
}
/*
* This is a starter character, and there are
* some characters before it. Those characters
* have been reordered properly, and
* ready for composition.
*/
if (do_composition && wb.cclass[0] == 0)
compose(&wb);
/*
* If CUR points to a starter character,
* then process of characters before CUR are
* already finished, because any further
* reordering/composition for them are blocked
* by the starter CUR points.
*/
if (wb.cur > 0 && wb.cclass[wb.cur] == 0) {
/* Flush everything before CUR. */
r = flush_before_cur(&wb, aToStr);
if (r != NS_OK)
break;
}
}
}
if (r == NS_OK) {
if (do_composition && wb.cur > 0 && wb.cclass[0] == 0) {
/*
* There is some characters left in WB.
* They are ordered, but not composed yet.
* Now CUR points just after the last character in WB,
* and since compose() tries to compose characters
* between top and CUR inclusive, we must make CUR
* one character back during compose().
*/
wb.cur--;
compose(&wb);
wb.cur++;
}
/*
* Call this even when WB.CUR == 0, to make TO
* NUL-terminated.
*/
r = flush_before_cur(&wb, aToStr);
}
workbuf_free(&wb);
return (r);
}
gint
nsFreeTypeXImage::DrawString(nsRenderingContextGTK* aContext,
nsDrawingSurfaceGTK* aSurface, nscoord aX,
nscoord aY, const PRUnichar* aString,
PRUint32 aLength)
{
#if DEBUG_SHOW_GLYPH_BOX
PRUint32 x, y;
// grey shows image size
// red shows character cells
// green box shows text ink
#endif
if (aLength < 1) {
return 0;
}
// get the face/size from the FreeType cache
FT_Face face = getFTFace();
NS_ASSERTION(face, "failed to get face/size");
if (!face)
return 0;
nsresult rslt;
PRInt32 leftBearing, rightBearing, ascent, descent, width;
rslt = doGetBoundingMetrics(aString, aLength, &leftBearing, &rightBearing,
&ascent, &descent, &width);
if (NS_FAILED(rslt))
return 0;
// make sure we bring down enough background for blending
rightBearing = PR_MAX(rightBearing, width+1);
// offset in the ximage to the x origin
PRInt32 x_origin = PR_MAX(0, -leftBearing);
// offset in the ximage to the x origin
PRInt32 y_origin = ascent;
PRInt32 x_pos = x_origin;
int image_width = x_origin + rightBearing;
int image_height = y_origin + PR_MAX(descent, 0);
if ((image_width<=0) || (image_height<=0)) {
// if we do not have any pixels then no point in trying to draw
// eg: the space char has 0 height
NS_ASSERTION(width>=0, "Negative width");
return width;
}
Display *dpy = GDK_DISPLAY();
Drawable win = GDK_WINDOW_XWINDOW(aSurface->GetDrawable());
GC gc = GDK_GC_XGC(aContext->GetGC());
XGCValues values;
if (!XGetGCValues(dpy, gc, GCForeground, &values)) {
NS_ERROR("failed to get foreground pixel");
return 0;
}
nscolor color = nsX11AlphaBlend::PixelToNSColor(values.foreground);
#if DEBUG_SHOW_GLYPH_BOX
// show X/Y origin
XDrawLine(dpy, win, DefaultGC(dpy, 0), aX-2, aY, aX+2, aY);
XDrawLine(dpy, win, DefaultGC(dpy, 0), aX, aY-2, aX, aY+2);
// show width
XDrawLine(dpy, win, DefaultGC(dpy, 0), aX-x_origin, aY-y_origin-2,
aX+rightBearing, aY-y_origin-2);
#endif
//
// Get the background
//
XImage *sub_image = nsX11AlphaBlend::GetBackground(dpy, DefaultScreen(dpy),
win, aX-x_origin, aY-y_origin,
image_width, image_height);
if (sub_image==nsnull) {
#ifdef DEBUG
int screen = DefaultScreen(dpy);
// complain if the requested area is not completely off screen
int win_width = DisplayWidth(dpy, screen);
int win_height = DisplayHeight(dpy, screen);
if (((int)(aX-leftBearing+image_width) > 0) // not hidden to left
&& ((int)(aX-leftBearing) < win_width) // not hidden to right
&& ((int)(aY-ascent+image_height) > 0)// not hidden to top
&& ((int)(aY-ascent) < win_height)) // not hidden to bottom
{
NS_ASSERTION(sub_image, "failed to get the image");
}
#endif
return 0;
}
#if DEBUG_SHOW_GLYPH_BOX
DEBUG_AADRAWBOX(sub_image,0,0,image_width,image_height,0,0,0,255/4);
nscolor black NS_RGB(0,255,0);
blendPixel blendPixelFunc = nsX11AlphaBlend::GetBlendPixel();
// x origin
for (x=0; x<(unsigned int)image_height; x++)
if (x%4==0) (*blendPixelFunc)(sub_image, x_origin, x, black, 255/2);
// y origin
for (y=0; y<(unsigned int)image_width; y++)
if (y%4==0) (*blendPixelFunc)(sub_image, y, ascent-1, black, 255/2);
#endif
FTC_Image_Cache icache;
mFt2->GetImageCache(&icache);
if (!icache)
return 0;
//
// Get aa glyphs and blend with background
//
blendGlyph blendGlyph = nsX11AlphaBlend::GetBlendGlyph();
PRUint32 i, extraSurrogateLength;
for (i=0; i<aLength; i+=1+extraSurrogateLength) {
FT_UInt glyph_index;
FT_Glyph glyph;
nsresult rv;
FT_BBox glyph_bbox;
FT_ULong code_point = aString[i];
extraSurrogateLength = 0;
if(i<aLength-1 && IS_HIGH_SURROGATE(code_point) && IS_LOW_SURROGATE(aString[i+1])) {
// if surrogate, make UCS4 code point from high aString[i] surrogate and
// low surrogate aString[i+1]
code_point = SURROGATE_TO_UCS4(code_point, aString[i+1]);
// skip aString[i+1], it is already used as low surrogate
extraSurrogateLength = 1;
}
mFt2->GetCharIndex(face, code_point, &glyph_index);
if (glyph_index) {
rv = mFt2->ImageCacheLookup(icache, &mImageDesc, glyph_index, &glyph);
}
if ((glyph_index) && (NS_SUCCEEDED(rv))) {
mFt2->GlyphGetCBox(glyph, ft_glyph_bbox_pixels, &glyph_bbox);
}
else {
// draw an empty box for the missing glyphs
GetFallbackGlyphMetrics(&glyph_bbox, face);
int x, y, w = glyph_bbox.xMax, h = glyph_bbox.yMax;
for (x=1; x<w; x++) {
XPutPixel(sub_image, x_pos+x, ascent-1, values.foreground);
XPutPixel(sub_image, x_pos+x, ascent-h, values.foreground);
}
for (y=1; y<h; y++) {
XPutPixel(sub_image, x_pos+1, ascent-y, values.foreground);
XPutPixel(sub_image, x_pos+w-1, ascent-y, values.foreground);
x = (y*(w-2))/h;
XPutPixel(sub_image, x_pos+x+1, ascent-y, values.foreground);
}
x_pos += w + 1;
continue;
}
FT_BitmapGlyph slot = (FT_BitmapGlyph)glyph;
nsAntiAliasedGlyph aaglyph(glyph_bbox.xMax-glyph_bbox.xMin,
glyph_bbox.yMax-glyph_bbox.yMin, 0);
PRUint8 buf[IMAGE_BUFFER_SIZE]; // try to use the stack for data
if (!aaglyph.WrapFreeType(&glyph_bbox, slot, buf, IMAGE_BUFFER_SIZE)) {
NS_ERROR("failed to wrap freetype image");
XDestroyImage(sub_image);
return 0;
}
//
// blend the aa-glyph onto the background
//
NS_ASSERTION(ascent>=glyph_bbox.yMax,"glyph too tall");
NS_ASSERTION(x_pos>=-aaglyph.GetLBearing(),"glyph extends too far to left");
#if DEBUG_SHOW_GLYPH_BOX
// draw box around part of glyph that extends to the left
// of the main area (negative LBearing)
if (aaglyph.GetLBearing() < 0) {
DEBUG_AADRAWBOX(sub_image, x_pos + aaglyph.GetLBearing(),
ascent-glyph_bbox.yMax,
-aaglyph.GetLBearing(), glyph_bbox.yMax, 255,0,0, 255/4);
}
// draw box around main glyph area
DEBUG_AADRAWBOX(sub_image, x_pos, ascent-glyph_bbox.yMax,
aaglyph.GetAdvance(), glyph_bbox.yMax, 0,255,0, 255/4);
// draw box around part of glyph that extends to the right
// of the main area (negative LBearing)
if (aaglyph.GetRBearing() > (int)aaglyph.GetAdvance()) {
DEBUG_AADRAWBOX(sub_image, x_pos + aaglyph.GetAdvance(),
ascent-glyph_bbox.yMax,
aaglyph.GetRBearing()-aaglyph.GetAdvance(),
glyph_bbox.yMax, 0,0,255, 255/4);
}
#endif
(*blendGlyph)(sub_image, &aaglyph, sLinearWeightTable, color,
x_pos + aaglyph.GetLBearing(), ascent-glyph_bbox.yMax);
x_pos += aaglyph.GetAdvance();
}
//
// Send it to the display
//
XPutImage(dpy, win, gc, sub_image, 0, 0, aX-x_origin , aY-ascent,
image_width, image_height);
XDestroyImage(sub_image);
return width;
}
bool
gfxScriptItemizer::Next(uint32_t& aRunStart, uint32_t& aRunLimit,
int32_t& 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) {
uint32_t ch;
int32_t sc;
uint32_t startOfChar = scriptLimit;
ch = textPtr[scriptLimit];
/* decode UTF-16 (may be surrogate pair) */
if (NS_IS_HIGH_SURROGATE(ch) && scriptLimit < textLength - 1) {
uint32_t low = textPtr[scriptLimit + 1];
if (NS_IS_LOW_SURROGATE(low)) {
ch = SURROGATE_TO_UCS4(ch, low);
scriptLimit += 1;
}
}
// Get the nsCharProps2 record for the current character,
// so we can read the script and (if needed) the gen category
// without needing to do two multi-level lookups.
// NOTE that this means we're relying on an implementation detail
// of the nsUnicodeProperties tables, and might have to revise this
// if the nsCharProps records used there are modified in future.
const nsCharProps2& charProps = GetCharProps2(ch);
// Initialize gc to UNASSIGNED; we'll only set it to the true GC
// if the character has script=COMMON, otherwise we don't care.
uint8_t gc = HB_UNICODE_GENERAL_CATEGORY_UNASSIGNED;
sc = charProps.mScriptCode;
if (sc == MOZ_SCRIPT_COMMON) {
/*
* 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 popped.
*
* We only do this if the script is COMMON; for chars with
* specific script assignments, we just use them as-is.
*/
gc = charProps.mCategory;
if (gc == HB_UNICODE_GENERAL_CATEGORY_OPEN_PUNCTUATION) {
uint32_t endPairChar = mozilla::unicode::GetMirroredChar(ch);
if (endPairChar != ch) {
push(endPairChar, scriptCode);
}
} else if (gc == HB_UNICODE_GENERAL_CATEGORY_CLOSE_PUNCTUATION &&
HasMirroredChar(ch))
{
while (STACK_IS_NOT_EMPTY() && TOP().endPairChar != ch) {
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 (gc == HB_UNICODE_GENERAL_CATEGORY_CLOSE_PUNCTUATION &&
HasMirroredChar(ch)) {
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;
}
nsresult
nsFreeTypeFont::doGetBoundingMetrics(const PRUnichar* aString, PRUint32 aLength,
PRInt32* aLeftBearing,
PRInt32* aRightBearing,
PRInt32* aAscent,
PRInt32* aDescent,
PRInt32* aWidth)
{
nsresult rv;
*aLeftBearing = 0;
*aRightBearing = 0;
*aAscent = 0;
*aDescent = 0;
*aWidth = 0;
if (aLength < 1) {
return NS_ERROR_FAILURE;
}
FT_Pos pos = 0;
FT_BBox bbox;
// initialize to "uninitialized" values
bbox.xMin = bbox.yMin = 32000;
bbox.xMax = bbox.yMax = -32000;
// get the face/size from the FreeType cache
FT_Face face = getFTFace();
NS_ASSERTION(face, "failed to get face/size");
if (!face)
return NS_ERROR_FAILURE;
FTC_Image_Cache icache;
mFt2->GetImageCache(&icache);
if (!icache)
return NS_ERROR_FAILURE;
// get the text size
PRUint32 i, extraSurrogateLength;
for (i=0; i<aLength; i+=1+extraSurrogateLength) {
FT_UInt glyph_index;
FT_Glyph glyph;
FT_BBox glyph_bbox;
FT_Pos advance;
extraSurrogateLength=0;
FT_ULong code_point = aString[i];
if(i<aLength-1 && IS_HIGH_SURROGATE(code_point) && IS_LOW_SURROGATE(aString[i+1])) {
// if surrogate, make UCS4 code point from high aString[i] surrogate and
// low surrogate aString[i+1]
code_point = SURROGATE_TO_UCS4(code_point, aString[i+1]);
// skip aString[i+1], it is already used as low surrogate
extraSurrogateLength = 1;
}
mFt2->GetCharIndex(face, code_point, &glyph_index);
//NS_ASSERTION(glyph_index,"failed to get glyph");
if (glyph_index) {
rv = mFt2->ImageCacheLookup(icache, &mImageDesc, glyph_index, &glyph);
NS_ASSERTION(NS_SUCCEEDED(rv),"error loading glyph");
}
if ((glyph_index) && (NS_SUCCEEDED(rv))) {
mFt2->GlyphGetCBox(glyph, ft_glyph_bbox_pixels, &glyph_bbox);
advance = FT_16_16_TO_REG(glyph->advance.x);
}
else {
// allocate space to draw an empty box in
GetFallbackGlyphMetrics(&glyph_bbox, face);
advance = glyph_bbox.xMax + 1;
}
bbox.xMin = PR_MIN(pos+glyph_bbox.xMin, bbox.xMin);
bbox.xMax = PR_MAX(pos+glyph_bbox.xMax, bbox.xMax);
bbox.yMin = PR_MIN(glyph_bbox.yMin, bbox.yMin);
bbox.yMax = PR_MAX(glyph_bbox.yMax, bbox.yMax);
pos += advance;
}
// check we got at least one size
if (bbox.xMin > bbox.xMax)
bbox.xMin = bbox.xMax = bbox.yMin = bbox.yMax = 0;
*aLeftBearing = bbox.xMin;
*aRightBearing = bbox.xMax;
*aAscent = bbox.yMax;
*aDescent = -bbox.yMin;
*aWidth = pos;
return NS_OK;
}
HRESULT Shape() {
HRESULT rv;
HDC shapeDC = nullptr;
const PRUnichar *str = mAlternativeString ? mAlternativeString : mItemString;
mScriptItem->a.fLogicalOrder = true;
SCRIPT_ANALYSIS sa = mScriptItem->a;
while (true) {
rv = ScriptShape(shapeDC, mShaper->ScriptCache(),
str, mItemLength,
mMaxGlyphs, &sa,
mGlyphs.Elements(), mClusters.Elements(),
mAttr.Elements(), &mNumGlyphs);
if (rv == E_OUTOFMEMORY) {
mMaxGlyphs *= 2;
if (!mGlyphs.SetLength(mMaxGlyphs) ||
!mAttr.SetLength(mMaxGlyphs)) {
return E_OUTOFMEMORY;
}
continue;
}
// Uniscribe can't do shaping with some fonts, so it sets the
// fNoGlyphIndex flag in the SCRIPT_ANALYSIS structure to indicate
// this. This occurs with CFF fonts loaded with
// AddFontMemResourceEx but it's not clear what the other cases
// are. We return an error so our caller can try fallback shaping.
// see http://msdn.microsoft.com/en-us/library/ms776520(VS.85).aspx
if (sa.fNoGlyphIndex) {
return GDI_ERROR;
}
if (rv == E_PENDING) {
if (shapeDC == mDC) {
// we already tried this once, something failed, give up
return E_PENDING;
}
SelectFont();
shapeDC = mDC;
continue;
}
// http://msdn.microsoft.com/en-us/library/dd368564(VS.85).aspx:
// Uniscribe will return this if "the font corresponding to the
// DC does not support the script required by the run...".
// In this case, we'll set the script code to SCRIPT_UNDEFINED
// and try again, so that we'll at least get glyphs even though
// they won't necessarily have proper shaping.
// (We probably shouldn't have selected this font at all,
// but it's too late to fix that here.)
if (rv == USP_E_SCRIPT_NOT_IN_FONT) {
sa.eScript = SCRIPT_UNDEFINED;
NS_WARNING("Uniscribe says font does not support script needed");
continue;
}
// Prior to Windows 7, Uniscribe didn't support Ideographic Variation
// Selectors. Replace the UVS glyph manually.
if (mIVS) {
uint32_t lastChar = str[mItemLength - 1];
if (NS_IS_LOW_SURROGATE(lastChar)
&& NS_IS_HIGH_SURROGATE(str[mItemLength - 2])) {
lastChar = SURROGATE_TO_UCS4(str[mItemLength - 2], lastChar);
}
uint16_t glyphId = mShaper->GetFont()->GetUVSGlyph(lastChar, mIVS);
if (glyphId) {
mGlyphs[mNumGlyphs - 1] = glyphId;
}
}
return rv;
}
}
bool
gfxUniscribeShaper::ShapeText(gfxContext *aContext,
const PRUnichar *aText,
uint32_t aOffset,
uint32_t aLength,
int32_t aScript,
gfxShapedText *aShapedText)
{
DCFromContext aDC(aContext);
bool result = true;
HRESULT rv;
Uniscribe us(aText, aShapedText, aOffset, aLength);
/* itemize the string */
int numItems = us.Itemize();
uint32_t length = aLength;
SaveDC(aDC);
uint32_t ivs = 0;
for (int i = 0; i < numItems; ++i) {
int iCharPos = us.ScriptItem(i)->iCharPos;
int iCharPosNext = us.ScriptItem(i+1)->iCharPos;
if (ivs) {
iCharPos += 2;
if (iCharPos >= iCharPosNext) {
ivs = 0;
continue;
}
}
if (i+1 < numItems && iCharPosNext <= length - 2
&& aText[iCharPosNext] == H_SURROGATE(kUnicodeVS17)
&& uint32_t(aText[iCharPosNext + 1]) - L_SURROGATE(kUnicodeVS17)
<= L_SURROGATE(kUnicodeVS256) - L_SURROGATE(kUnicodeVS17)) {
ivs = SURROGATE_TO_UCS4(aText[iCharPosNext],
aText[iCharPosNext + 1]);
} else {
ivs = 0;
}
UniscribeItem item(aContext, aDC, this,
aText + iCharPos,
iCharPosNext - iCharPos,
us.ScriptItem(i), ivs);
if (!item.AllocateBuffers()) {
result = false;
break;
}
if (!item.ShapingEnabled()) {
item.EnableShaping();
}
rv = item.Shape();
if (FAILED(rv)) {
// we know we have the glyphs to display this font already
// so Uniscribe just doesn't know how to shape the script.
// Render the glyphs without shaping.
item.DisableShaping();
rv = item.Shape();
}
#ifdef DEBUG
if (FAILED(rv)) {
NS_WARNING("Uniscribe failed to shape with font");
}
#endif
if (SUCCEEDED(rv)) {
rv = item.Place();
#ifdef DEBUG
if (FAILED(rv)) {
// crap fonts may fail when placing (e.g. funky free fonts)
NS_WARNING("Uniscribe failed to place with font");
}
#endif
}
if (FAILED(rv)) {
// Uniscribe doesn't like this font for some reason.
// Returning FALSE will make the gfxGDIFont retry with the
// "dumb" GDI shaper, unless useUniscribeOnly was set.
result = false;
break;
}
item.SaveGlyphs(aShapedText, aOffset);
}
RestoreDC(aDC, -1);
return result;
}
void SaveGlyphs(gfxShapedText *aShapedText, uint32_t aOffset) {
uint32_t offsetInRun = mScriptItem->iCharPos;
// XXX We should store this in the item and only fetch it once
SCRIPT_FONTPROPERTIES sfp;
ScriptFontProperties(&sfp);
uint32_t offset = 0;
nsAutoTArray<gfxShapedText::DetailedGlyph,1> detailedGlyphs;
gfxShapedText::CompressedGlyph g;
gfxShapedText::CompressedGlyph *charGlyphs =
aShapedText->GetCharacterGlyphs();
const uint32_t appUnitsPerDevUnit = aShapedText->GetAppUnitsPerDevUnit();
while (offset < mItemLength) {
uint32_t runOffset = aOffset + offsetInRun + offset;
bool atClusterStart = charGlyphs[runOffset].IsClusterStart();
if (offset > 0 && mClusters[offset] == mClusters[offset - 1]) {
gfxShapedText::CompressedGlyph &g = charGlyphs[runOffset];
NS_ASSERTION(!g.IsSimpleGlyph(), "overwriting a simple glyph");
g.SetComplex(atClusterStart, false, 0);
} else {
// Count glyphs for this character
uint32_t k = mClusters[offset];
uint32_t glyphCount = mNumGlyphs - k;
uint32_t nextClusterOffset;
bool missing = IsGlyphMissing(&sfp, k);
for (nextClusterOffset = offset + 1; nextClusterOffset < mItemLength; ++nextClusterOffset) {
if (mClusters[nextClusterOffset] > k) {
glyphCount = mClusters[nextClusterOffset] - k;
break;
}
}
uint32_t j;
for (j = 1; j < glyphCount; ++j) {
if (IsGlyphMissing(&sfp, k + j)) {
missing = true;
}
}
int32_t advance = mAdvances[k]*appUnitsPerDevUnit;
WORD glyph = mGlyphs[k];
NS_ASSERTION(!gfxFontGroup::IsInvalidChar(mItemString[offset]),
"invalid character detected");
if (missing) {
if (NS_IS_HIGH_SURROGATE(mItemString[offset]) &&
offset + 1 < mItemLength &&
NS_IS_LOW_SURROGATE(mItemString[offset + 1])) {
aShapedText->SetMissingGlyph(runOffset,
SURROGATE_TO_UCS4(mItemString[offset],
mItemString[offset + 1]),
mShaper->GetFont());
} else {
aShapedText->SetMissingGlyph(runOffset, mItemString[offset],
mShaper->GetFont());
}
} else if (glyphCount == 1 && advance >= 0 &&
mOffsets[k].dv == 0 && mOffsets[k].du == 0 &&
gfxShapedText::CompressedGlyph::IsSimpleAdvance(advance) &&
gfxShapedText::CompressedGlyph::IsSimpleGlyphID(glyph) &&
atClusterStart)
{
charGlyphs[runOffset].SetSimpleGlyph(advance, glyph);
} else {
if (detailedGlyphs.Length() < glyphCount) {
if (!detailedGlyphs.AppendElements(glyphCount - detailedGlyphs.Length()))
return;
}
uint32_t i;
for (i = 0; i < glyphCount; ++i) {
gfxTextRun::DetailedGlyph *details = &detailedGlyphs[i];
details->mGlyphID = mGlyphs[k + i];
details->mAdvance = mAdvances[k + i] * appUnitsPerDevUnit;
details->mXOffset = float(mOffsets[k + i].du) * appUnitsPerDevUnit *
aShapedText->GetDirection();
details->mYOffset = - float(mOffsets[k + i].dv) * appUnitsPerDevUnit;
}
aShapedText->SetGlyphs(runOffset,
g.SetComplex(atClusterStart, true,
glyphCount),
detailedGlyphs.Elements());
}
}
++offset;
}
}
NS_IMETHODIMP
nsSaveAsCharset::DoCharsetConversion(const char16_t *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;
}
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<nsStyleContext*,50> styleArray;
nsAutoTArray<PRUint8,50> canBreakBeforeArray;
PRUint32 extraCharsCount = 0;
// 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
} languageSpecificCasing = eNone;
const nsIAtom* lang = nsnull;
bool capitalizeDutchIJ = false;
PRUint32 i;
for (i = 0; i < length; ++i) {
PRUint32 ch = str[i];
nsStyleContext* styleContext = styles[i];
charsToMergeArray.AppendElement(false);
styleArray.AppendElement(styleContext);
canBreakBeforeArray.AppendElement(aTextRun->CanBreakLineBefore(i));
PRUint8 style = mAllUppercase ? NS_STYLE_TEXT_TRANSFORM_UPPERCASE
: styleContext->GetStyleText()->mTextTransform;
bool extraChar = false;
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 {
languageSpecificCasing = eNone;
}
}
switch (style) {
case NS_STYLE_TEXT_TRANSFORM_LOWERCASE:
if (languageSpecificCasing == eTurkish && ch == 'I') {
ch = LATIN_SMALL_LETTER_DOTLESS_I;
} else {
ch = ToLowerCase(ch);
}
break;
case NS_STYLE_TEXT_TRANSFORM_UPPERCASE:
if (ch == SZLIG) {
convertedString.Append('S');
extraChar = true;
ch = 'S';
} else if (languageSpecificCasing == eTurkish && ch == 'i') {
ch = LATIN_CAPITAL_LETTER_I_WITH_DOT_ABOVE;
} else {
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 (ch == SZLIG) {
convertedString.Append('S');
extraChar = true;
ch = 'S';
} else if (languageSpecificCasing == eTurkish && ch == 'i') {
ch = LATIN_CAPITAL_LETTER_I_WITH_DOT_ABOVE;
} else if (languageSpecificCasing == eDutch && ch == 'i') {
ch = 'I';
capitalizeDutchIJ = true;
} else {
ch = ToTitleCase(ch);
}
}
break;
default:
break;
}
if (IS_IN_BMP(ch)) {
convertedString.Append(ch);
} else {
convertedString.Append(H_SURROGATE(ch));
convertedString.Append(L_SURROGATE(ch));
i++;
charsToMergeArray.AppendElement(false);
styleArray.AppendElement(styleContext);
canBreakBeforeArray.AppendElement(false);
}
if (extraChar) {
++extraCharsCount;
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 (extraCharsCount > 0) {
// Now merge multiple characters into one multi-glyph character as required
MergeCharactersInTextRun(aTextRun, child, charsToMergeArray.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;
bool runIsLowercase = false;
nsAutoTArray<nsStyleContext*,50> styleArray;
nsAutoTArray<PRUint8,50> canBreakBeforeArray;
PRUint32 i;
for (i = 0; i <= length; ++i) {
bool isLowercase = false;
if (i < length) {
// 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)) {
isLowercase = runIsLowercase;
} else {
if (styles[i]->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);
isLowercase = ch != ch2 || ch == SZLIG;
} else {
// Don't transform the character! I.e., pretend that it's not lowercase
}
}
}
if ((i == length || runIsLowercase != isLowercase) && runStart < i) {
nsAutoPtr<nsTransformedTextRun> transformedChild;
nsAutoPtr<gfxTextRun> cachedChild;
gfxTextRun* child;
if (runIsLowercase) {
transformedChild = uppercaseFactory.MakeTextRun(str + runStart, i - runStart,
&innerParams, smallFont, flags, styleArray.Elements(), false);
child = transformedChild;
} else {
cachedChild =
fontGroup->MakeTextRun(str + runStart, i - runStart,
&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(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) {
runIsLowercase = isLowercase;
styleArray.AppendElement(styles[i]);
canBreakBeforeArray.AppendElement(aTextRun->CanBreakLineBefore(i));
}
}
}
void
nsHTMLContentSerializer::AppendAndTranslateEntities(const nsAString& aStr,
nsAString& aOutputStr)
{
if (mBodyOnly && !mInBody) {
return;
}
if (mDisableEntityEncoding) {
aOutputStr.Append(aStr);
return;
}
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::AppendAndTranslateEntities(aStr, aOutputStr);
}
}
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;
uint32_t wordStart = 0, wordLimit = 0;
uint32_t chLen;
for (uint32_t i = 0; i < aString.Length(); i += chLen) {
uint32_t 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 = mozilla::unicode::GetGenCategory(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 = nullptr;
int *pos = nullptr;
int *cut = nullptr;
int err = hnj_hyphen_hyphenate2((HyphenDict*)mDict,
utf8.BeginReading(), utf8.Length(),
utf8hyphens.Elements(), nullptr,
&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;
}
