ExceptionOr<void> WebKitCSSMatrix::setMatrixValue(const String& string)
{
if (string.isEmpty())
return { };
auto styleDeclaration = MutableStyleProperties::create();
if (CSSParser::parseValue(styleDeclaration, CSSPropertyTransform, string, true, HTMLStandardMode) == CSSParser::ParseResult::Error)
return Exception { SYNTAX_ERR };
// Convert to TransformOperations. This can fail if a property requires style (i.e., param uses 'ems' or 'exs')
auto value = styleDeclaration->getPropertyCSSValue(CSSPropertyTransform);
// Check for a "none" or empty transform. In these cases we can use the default identity matrix.
if (!value || (is<CSSPrimitiveValue>(*value) && downcast<CSSPrimitiveValue>(*value).valueID() == CSSValueNone))
return { };
TransformOperations operations;
if (!transformsForValue(*value, CSSToLengthConversionData(), operations))
return Exception { SYNTAX_ERR };
// Convert transform operations to a TransformationMatrix. This can fail if a parameter has a percentage ('%').
TransformationMatrix matrix;
for (auto& operation : operations.operations()) {
if (operation->apply(matrix, IntSize(0, 0)))
return Exception { SYNTAX_ERR };
}
m_matrix = matrix;
return { };
}
void WebKitCSSMatrix::setMatrixValue(const String& string, ExceptionCode& ec)
{
if (string.isEmpty())
return;
RefPtr<MutableStyleProperties> styleDeclaration = MutableStyleProperties::create();
if (CSSParser::parseValue(styleDeclaration.get(), CSSPropertyWebkitTransform, string, true, CSSStrictMode, 0)) {
// Convert to TransformOperations. This can fail if a property
// requires style (i.e., param uses 'ems' or 'exs')
RefPtr<CSSValue> value = styleDeclaration->getPropertyCSSValue(CSSPropertyWebkitTransform);
// Check for a "none" or empty transform. In these cases we can use the default identity matrix.
if (!value || (value->isPrimitiveValue() && (toCSSPrimitiveValue(value.get()))->getValueID() == CSSValueNone))
return;
TransformOperations operations;
if (!transformsForValue(0, 0, value.get(), operations)) {
ec = SYNTAX_ERR;
return;
}
// Convert transform operations to a TransformationMatrix. This can fail
// if a param has a percentage ('%')
TransformationMatrix t;
for (unsigned i = 0; i < operations.operations().size(); ++i) {
if (operations.operations()[i].get()->apply(t, IntSize(0, 0))) {
ec = SYNTAX_ERR;
return;
}
}
// set the matrix
m_matrix = t;
} else // There is something there but parsing failed.
ec = SYNTAX_ERR;
}
