/// <summary>
/// Processes the HTML attribute.
/// </summary>
private void ProcessAttribute(DothtmlAttributeNode attribute, ResolvedControl control, DataContextStack dataContext)
{
if (attribute.AttributePrefix == "html")
{
if (!control.Metadata.HasHtmlAttributesCollection)
{
throw new DotvvmCompilationException($"control { control.Metadata.Name } does not have html attribute collection", attribute.Tokens);
}
control.SetHtmlAttribute(attribute.AttributeName, ProcessAttributeValue(attribute.ValueNode, dataContext));
return;
}
if (!string.IsNullOrEmpty(attribute.AttributePrefix))
{
throw new DotvvmCompilationException("Attributes with XML namespaces are not supported!", attribute.Tokens);
}
// find the property
var property = FindProperty(control.Metadata, attribute.AttributeName);
if (property != null)
{
if (property.IsBindingProperty)
{
var typeChange = DataContextChangeAttribute.GetDataContextExpression(dataContext, control, property);
if (typeChange != null)
{
dataContext = new DataContextStack(typeChange, dataContext);
}
}
if (!property.MarkupOptions.MappingMode.HasFlag(MappingMode.Attribute))
{
throw new DotvvmCompilationException($"The property '{ property.FullName }' cannot be used as attribute", attribute.Tokens);
}
// set the property
if (attribute.ValueNode == null)
{
throw new DotvvmCompilationException($"The attribute '{property.Name}' on the control '{control.Metadata.Name}' must have a value!", attribute.Tokens);
}
else if (attribute.ValueNode is DothtmlValueBindingNode)
{
// binding
var bindingNode = (attribute.ValueNode as DothtmlValueBindingNode).BindingNode;
if (!property.MarkupOptions.AllowBinding)
{
throw new DotvvmCompilationException($"The property '{ property.FullName }' cannot contain binding.", bindingNode.Tokens);
}
var resolvedBinding = ProcessBinding(bindingNode, dataContext);
control.SetProperty(new ResolvedPropertyBinding(property, resolvedBinding));
}
else
{
// hard-coded value in markup
if (!property.MarkupOptions.AllowHardCodedValue)
{
throw new DotvvmCompilationException($"The property '{ property.FullName }' cannot contain hard coded value.", attribute.ValueNode.Tokens);
}
var textValue = attribute.ValueNode as DothtmlValueTextNode;
var value = ReflectionUtils.ConvertValue(textValue.Text, property.PropertyType);
control.SetPropertyValue(property, value);
}
}
else if (control.Metadata.HasHtmlAttributesCollection)
{
// if the property is not found, add it as an HTML attribute
control.SetHtmlAttribute(attribute.AttributeName, ProcessAttributeValue(attribute.ValueNode, dataContext));
}
else
{
throw new DotvvmCompilationException($"The control '{control.Metadata.Type}' does not have a property '{attribute.AttributeName}' and does not allow HTML attributes!");
}
}