ExceptionOr<float> SVGLengthContext::convertValueFromEMSToUserUnits(float value) const
{
auto* style = renderStyleForLengthResolving(m_context);
if (!style)
return Exception { NOT_SUPPORTED_ERR };
return value * style->fontSize();
}
float SVGLengthContext::convertValueFromEMSToUserUnits(float value, ExceptionCode& ec) const
{
auto* style = renderStyleForLengthResolving(m_context);
if (!style) {
ec = NOT_SUPPORTED_ERR;
return 0;
}
return value * style->fontSize();
}
float SVGLengthContext::convertValueFromEMSToUserUnits(float value, ExceptionState& es) const
{
RenderStyle* style = renderStyleForLengthResolving(m_context);
if (!style) {
es.throwDOMException(NotSupportedError);
return 0;
}
return value * style->specifiedFontSize();
}
ExceptionOr<float> SVGLengthContext::convertValueFromEXSToUserUnits(float value) const
{
auto* style = renderStyleForLengthResolving(m_context);
if (!style)
return Exception { NOT_SUPPORTED_ERR };
// Use of ceil allows a pixel match to the W3Cs expected output of coords-units-03-b.svg
// if this causes problems in real world cases maybe it would be best to remove this
return value * std::ceil(style->fontMetrics().xHeight());
}
float SVGLengthContext::convertValueFromEXSToUserUnits(float value, ExceptionState& es) const
{
RenderStyle* style = renderStyleForLengthResolving(m_context);
if (!style) {
es.throwDOMException(NotSupportedError);
return 0;
}
// Use of ceil allows a pixel match to the W3Cs expected output of coords-units-03-b.svg
// if this causes problems in real world cases maybe it would be best to remove this
return value * ceilf(style->fontMetrics().xHeight());
}
float SVGLengthContext::convertValueFromUserUnitsToEMS(float value, ExceptionState& exceptionState) const
{
RenderStyle* style = renderStyleForLengthResolving(m_context);
if (!style) {
exceptionState.throwDOMException(NotSupportedError, "No context could be found.");
return 0;
}
float fontSize = style->specifiedFontSize();
if (!fontSize) {
exceptionState.throwDOMException(NotSupportedError, "No font-size could be determined.");
return 0;
}
return value / fontSize;
}
float SVGLengthContext::convertValueFromUserUnitsToEMS(float value, ExceptionCode& ec) const
{
RenderStyle* style = renderStyleForLengthResolving(m_context);
if (!style) {
ec = NOT_SUPPORTED_ERR;
return 0;
}
float fontSize = style->fontSize();
if (!fontSize) {
ec = NOT_SUPPORTED_ERR;
return 0;
}
return value / fontSize;
}
float SVGLengthContext::convertValueFromUserUnitsToEXS(float value, ExceptionCode& ec) const
{
auto* style = renderStyleForLengthResolving(m_context);
if (!style) {
ec = NOT_SUPPORTED_ERR;
return 0;
}
// Use of ceil allows a pixel match to the W3Cs expected output of coords-units-03-b.svg
// if this causes problems in real world cases maybe it would be best to remove this
float xHeight = ceilf(style->fontMetrics().xHeight());
if (!xHeight) {
ec = NOT_SUPPORTED_ERR;
return 0;
}
return value / xHeight;
}
float SVGLengthContext::convertValueFromUserUnitsToEXS(float value, ExceptionState& exceptionState) const
{
RenderStyle* style = renderStyleForLengthResolving(m_context);
if (!style) {
exceptionState.throwDOMException(NotSupportedError, "No context could be found.");
return 0;
}
// Use of ceil allows a pixel match to the W3Cs expected output of coords-units-03-b.svg
// if this causes problems in real world cases maybe it would be best to remove this
float xHeight = ceilf(style->fontMetrics().xHeight());
if (!xHeight) {
exceptionState.throwDOMException(NotSupportedError, "No x-height could be determined.");
return 0;
}
return value / xHeight;
}
