void
nsCaseTransformTextRunFactory::RebuildTextRun(nsTransformedTextRun* aTextRun,
gfxContext* aRefContext)
{
nsAutoString convertedString;
nsAutoTArray<bool,50> charsToMergeArray;
nsAutoTArray<bool,50> deletedCharsArray;
nsAutoTArray<uint8_t,50> canBreakBeforeArray;
nsAutoTArray<nsStyleContext*,50> styleArray;
bool mergeNeeded = TransformString(aTextRun->mString,
convertedString,
mAllUppercase,
nullptr,
charsToMergeArray,
deletedCharsArray,
aTextRun,
&canBreakBeforeArray,
&styleArray);
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);
}
}
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;
PRUint32 i;
for (i = 0; i < length; ++i) {
PRUnichar ch = str[i];
charsToMergeArray.AppendElement(false);
styleArray.AppendElement(styles[i]);
canBreakBeforeArray.AppendElement(aTextRun->CanBreakLineBefore(i));
PRUint8 style = mAllUppercase ? NS_STYLE_TEXT_TRANSFORM_UPPERCASE
: styles[i]->GetStyleText()->mTextTransform;
bool extraChar = false;
switch (style) {
case NS_STYLE_TEXT_TRANSFORM_LOWERCASE:
ch = ToLowerCase(ch);
break;
case NS_STYLE_TEXT_TRANSFORM_UPPERCASE:
if (ch == SZLIG) {
convertedString.Append('S');
extraChar = true;
ch = 'S';
} else {
ch = ToUpperCase(ch);
}
break;
case NS_STYLE_TEXT_TRANSFORM_CAPITALIZE:
if (i < aTextRun->mCapitalize.Length() && aTextRun->mCapitalize[i]) {
if (ch == SZLIG) {
convertedString.Append('S');
extraChar = true;
ch = 'S';
} else {
ch = ToTitleCase(ch);
}
}
break;
default:
break;
}
convertedString.Append(ch);
if (extraChar) {
++extraCharsCount;
charsToMergeArray.AppendElement(true);
styleArray.AppendElement(styles[i]);
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) {
PRUnichar ch = str[i];
PRUnichar ch2;
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
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
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);
}
}
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;
uint32_t flags;
gfxTextRunFactory::Parameters innerParams =
GetParametersForInner(aTextRun, &flags, aRefContext);
uint32_t 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(nullptr, true);
aTextRun->ResetGlyphRuns();
uint32_t runStart = 0;
nsAutoTArray<nsStyleContext*,50> styleArray;
nsAutoTArray<uint8_t,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 (uint32_t 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->StyleFont()->mFont.variant == NS_STYLE_FONT_VARIANT_SMALL_CAPS) {
uint32_t 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]);
}
uint32_t ch2 = ToUpperCase(ch);
if (ch != ch2 || mozilla::unicode::SpecialUpper(ch)) {
chCase = kLowercase;
} else if (styleContext->StyleFont()->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));
}
}
}
