/**
* Calculates the macro-expanded value of an attribute on the node.
* Returns true if the attribute is defined.
*/
bool GetAttributeValue(XmlNode node, XmlMacroCollection macros, string attribName, out string value)
{
value = node.GetAttributeValue(attribName);
if (value != null)
{
try
{
value = macros.GetExpandedValue(value);
}
catch (Exception ex)
{
throw new JRunXmlException(node, ex, "Could not expand macro value for attribute \"{0}\"", attribName);
}
}
return value != null;
}
/**
* Retrieve the macro-expanded text value of a child of an xml node.
* Properties are inheritable from templates.
* Returns true if the property is defined.
*/
bool GetPropertyValue(XmlNode node, XmlMacroCollection macros, string propertyName, out string value)
{
value = null;
// check if we define this, or any of our templates
foreach (var templateNode in NodeTemplateTree(node, macros))
{
var childNode = templateNode.SelectSingleNode(propertyName);
if (childNode != null)
{
value = childNode.InnerText;
break;
}
}
if (value != null)
{
try
{
value = macros.GetExpandedValue(value);
}
catch (Exception ex)
{
throw new JRunXmlException(node, ex, "Could not expand macro value for property \"{0}\"", propertyName);
}
}
return value != null;
}
/**
* Creates a virtual shortcut for the given context and node
*/
XmlVirtualShortcut CreateVirtualShortcut(XmlNode context, XmlNode shortcutNode, XmlMacroCollection outerMacros)
{
var nodeName = shortcutNode.GetAttributeValue("name");
if (!String.IsNullOrEmpty(nodeName))
{
var realName = outerMacros.GetExpandedValue(nodeName);
if (!String.IsNullOrEmpty(realName))
{
var newMacros = new XmlMacroCollection(outerMacros);
AddTemplateMacros(shortcutNode, newMacros);
return new XmlVirtualShortcut(realName, context, shortcutNode, newMacros);
}
}
return null;
}
