private void HandleUnboundAttribute(AddTagHelperHtmlAttribute attribute, int attributeIndex, RenderTagHelper parent)
{
if (attribute.ValuePieces != null && (attribute.ValuePieces.Count != 1 || !(attribute.ValuePieces.First() is RenderHtml)))
{
return;
}
var plainTextValue = (attribute.ValuePieces?.First() as RenderHtml)?.Html;
DeclarePreallocatedTagHelperHtmlAttribute declaration = null;
for (var i = 0; i < _classDeclaration.Children.Count; i++)
{
var current = _classDeclaration.Children[i];
if (current is DeclarePreallocatedTagHelperHtmlAttribute)
{
var existingDeclaration = (DeclarePreallocatedTagHelperHtmlAttribute)current;
if (string.Equals(existingDeclaration.Name, attribute.Name, StringComparison.Ordinal) &&
string.Equals(existingDeclaration.Value, plainTextValue, StringComparison.Ordinal) &&
existingDeclaration.ValueStyle == attribute.ValueStyle)
{
declaration = existingDeclaration;
break;
}
}
}
if (declaration == null)
{
var variableCount = _classDeclaration.Children.Count - _variableCountOffset;
var preAllocatedAttributeVariableName = PreAllocatedAttributeVariablePrefix + variableCount;
declaration = new DeclarePreallocatedTagHelperHtmlAttribute
{
VariableName = preAllocatedAttributeVariableName,
Name = attribute.Name,
Value = plainTextValue,
ValueStyle = attribute.ValueStyle,
};
_classDeclaration.Children.Insert(0, declaration);
}
var addPreAllocatedAttribute = new AddPreallocatedTagHelperHtmlAttribute
{
AttributeVariableName = declaration.VariableName
};
parent.Children[attributeIndex] = addPreAllocatedAttribute;
}
private void HandleBoundAttribute(SetTagHelperProperty attribute, int attributeIndex, RenderTagHelper parent)
{
if (!attribute.AssociatedDescriptor.IsStringProperty ||
attribute.Value.Children.Count != 1 ||
!(attribute.Value.Children.First() is RenderHtml))
{
return;
}
var plainTextValue = (attribute.Value.Children.First() as RenderHtml).Html;
DeclarePreallocatedTagHelperAttribute declaration = null;
for (var i = 0; i < _classDeclaration.Children.Count; i++)
{
var current = _classDeclaration.Children[i];
if (current is DeclarePreallocatedTagHelperAttribute)
{
var existingDeclaration = (DeclarePreallocatedTagHelperAttribute)current;
if (string.Equals(existingDeclaration.Name, attribute.AttributeName, StringComparison.Ordinal) &&
string.Equals(existingDeclaration.Value, plainTextValue, StringComparison.Ordinal) &&
existingDeclaration.ValueStyle == attribute.ValueStyle)
{
declaration = existingDeclaration;
break;
}
}
}
if (declaration == null)
{
var variableCount = _classDeclaration.Children.Count - _variableCountOffset;
var preAllocatedAttributeVariableName = PreAllocatedAttributeVariablePrefix + variableCount;
declaration = new DeclarePreallocatedTagHelperAttribute
{
VariableName = preAllocatedAttributeVariableName,
Name = attribute.AttributeName,
Value = plainTextValue,
ValueStyle = attribute.ValueStyle,
};
_classDeclaration.Children.Insert(0, declaration);
}
var setPreallocatedProperty = new SetPreallocatedTagHelperProperty
{
AttributeVariableName = declaration.VariableName,
AttributeName = attribute.AttributeName,
TagHelperTypeName = attribute.TagHelperTypeName,
PropertyName = attribute.PropertyName,
AssociatedDescriptor = attribute.AssociatedDescriptor,
};
parent.Children[attributeIndex] = setPreallocatedProperty;
}
