/// <inheritdoc />
public override void Apply(XmlDocument document, string key)
{
foreach (XPathNavigator node in document.CreateNavigator().Select(selector).ToArray())
{
string reference = node.Value;
// check for validity of reference
if (validSnippetReference.IsMatch(reference))
{
var identifiers = SnippetIdentifier.ParseReference(reference);
if (identifiers.Count() == 1)
{
// one snippet referenced
SnippetIdentifier identifier = identifiers.First();
List <StoredSnippet> values;
if (snippets.TryGetValue(identifier, out values))
{
XmlWriter writer = node.InsertAfter();
writer.WriteStartElement("snippets");
writer.WriteAttributeString("reference", reference);
foreach (StoredSnippet value in values)
{
writer.WriteStartElement("snippet");
writer.WriteAttributeString("language", value.Language);
if (colorization.ContainsKey(value.Language))
{
WriteColorizedSnippet(ColorizeSnippet(value.Text, colorization[value.Language]), writer);
}
else
{
writer.WriteString(value.Text);
}
writer.WriteEndElement();
}
writer.WriteEndElement();
writer.Close();
}
else
{
base.WriteMessage(key, MessageLevel.Warn, "No snippet with identifier '{0}' was found.", identifier);
}
}
else
{
// multiple snippets referenced
// create structure that maps language -> snippets
Dictionary <string, List <StoredSnippet> > map = new Dictionary <string, List <StoredSnippet> >();
foreach (SnippetIdentifier identifier in identifiers)
{
List <StoredSnippet> values;
if (snippets.TryGetValue(identifier, out values))
{
foreach (StoredSnippet value in values)
{
List <StoredSnippet> pieces;
if (!map.TryGetValue(value.Language, out pieces))
{
pieces = new List <StoredSnippet>();
map.Add(value.Language, pieces);
}
pieces.Add(value);
}
}
}
XmlWriter writer = node.InsertAfter();
writer.WriteStartElement("snippets");
writer.WriteAttributeString("reference", reference);
foreach (KeyValuePair <string, List <StoredSnippet> > entry in map)
{
writer.WriteStartElement("snippet");
writer.WriteAttributeString("language", entry.Key);
List <StoredSnippet> values = entry.Value;
for (int i = 0; i < values.Count; i++)
{
if (i > 0)
{
writer.WriteString("\n\n...\n\n");
}
writer.WriteString(values[i].Text);
}
writer.WriteEndElement();
}
writer.WriteEndElement();
writer.Close();
}
}
else
{
base.WriteMessage(key, MessageLevel.Warn, "The code reference '{0}' is not well-formed", reference);
}
node.DeleteSelf();
}
}
