FontDescription::VariantLigatures FontDescription::getVariantLigatures() const {
VariantLigatures ligatures;
ligatures.common = commonLigaturesState();
ligatures.discretionary = discretionaryLigaturesState();
ligatures.historical = historicalLigaturesState();
ligatures.contextual = contextualLigaturesState();
return ligatures;
}
void FontDescription::updateTypesettingFeatures() {
m_fields.m_typesettingFeatures = s_defaultTypesettingFeatures;
switch (textRendering()) {
case AutoTextRendering:
break;
case OptimizeSpeed:
m_fields.m_typesettingFeatures &= ~(blink::Kerning | Ligatures);
break;
case GeometricPrecision:
case OptimizeLegibility:
m_fields.m_typesettingFeatures |= blink::Kerning | Ligatures;
break;
}
switch (getKerning()) {
case FontDescription::NoneKerning:
m_fields.m_typesettingFeatures &= ~blink::Kerning;
break;
case FontDescription::NormalKerning:
m_fields.m_typesettingFeatures |= blink::Kerning;
break;
case FontDescription::AutoKerning:
break;
}
// As per CSS (http://dev.w3.org/csswg/css-text-3/#letter-spacing-property),
// When the effective letter-spacing between two characters is not zero (due
// to either justification or non-zero computed letter-spacing), user agents
// should not apply optional ligatures.
if (m_letterSpacing == 0) {
switch (commonLigaturesState()) {
case FontDescription::DisabledLigaturesState:
m_fields.m_typesettingFeatures &= ~blink::Ligatures;
break;
case FontDescription::EnabledLigaturesState:
m_fields.m_typesettingFeatures |= blink::Ligatures;
break;
case FontDescription::NormalLigaturesState:
break;
}
if (discretionaryLigaturesState() ==
FontDescription::EnabledLigaturesState ||
historicalLigaturesState() == FontDescription::EnabledLigaturesState ||
contextualLigaturesState() == FontDescription::EnabledLigaturesState) {
m_fields.m_typesettingFeatures |= blink::Ligatures;
}
}
if (variantCaps() != CapsNormal)
m_fields.m_typesettingFeatures |= blink::Caps;
}
void FontDescription::updateTypesettingFeatures() const
{
m_typesettingFeatures = s_defaultTypesettingFeatures;
switch (textRendering()) {
case AutoTextRendering:
break;
case OptimizeSpeed:
m_typesettingFeatures &= ~(WebCore::Kerning | Ligatures);
break;
case GeometricPrecision:
case OptimizeLegibility:
m_typesettingFeatures |= WebCore::Kerning | Ligatures;
break;
}
switch (kerning()) {
case FontDescription::NoneKerning:
m_typesettingFeatures &= ~WebCore::Kerning;
break;
case FontDescription::NormalKerning:
m_typesettingFeatures |= WebCore::Kerning;
break;
case FontDescription::AutoKerning:
break;
}
switch (commonLigaturesState()) {
case FontDescription::DisabledLigaturesState:
m_typesettingFeatures &= ~Ligatures;
break;
case FontDescription::EnabledLigaturesState:
m_typesettingFeatures |= Ligatures;
break;
case FontDescription::NormalLigaturesState:
break;
}
if (discretionaryLigaturesState() == FontDescription::EnabledLigaturesState
|| historicalLigaturesState() == FontDescription::EnabledLigaturesState
|| contextualLigaturesState() == FontDescription::EnabledLigaturesState) {
m_typesettingFeatures |= WebCore::Ligatures;
}
}