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
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));
}
}
}