protected virtual ParsedTemplate PrepareTemplate(TemplateData templateData, Stack<IFileProvider> providers = null)
{
// set up temp file container
TempFileCollection tempFiles = new TempFileCollection(templateData.TemporaryFilesPath,
templateData.KeepTemporaryFiles);
if (!Directory.Exists(tempFiles.TempDir))
Directory.CreateDirectory(tempFiles.TempDir);
if (providers == null)
providers = new Stack<IFileProvider>();
// clone orig doc
XDocument workingDoc;
// this is required to preserve the line information
using (var xmlReader = this._templateDefinition.CreateReader())
workingDoc = XDocument.Load(xmlReader, LoadOptions.SetLineInfo);
// template inheritence
XAttribute templateInheritsAttr = workingDoc.Root.Attribute("inherits");
if (templateInheritsAttr != null)
{
int depth = providers.Count + 1;
Template inheritedTemplate = new Template(this._container);
inheritedTemplate.Load(this._templateResolver, templateInheritsAttr.Value);
ParsedTemplate parsedTemplate = inheritedTemplate.PrepareTemplate(templateData, providers);
providers.Push(inheritedTemplate.GetScopedFileProvider());
// a little hacky but it should work with the Reverse()/AddFirst()
foreach (XElement elem in parsedTemplate.Source.Root.Elements().Reverse())
{
workingDoc.Root.AddFirst(new XElement(elem));
}
// create and register temp file (this can be overriden later if there are meta-template directives
// in the template
this._templateSourcePath = this.SaveTempFile(tempFiles, workingDoc, "inherited." + depth);
}
// add our file provider to the top of the stack
providers.Push(this.GetScopedFileProvider());
// start by loading any parameters as they are needed for meta-template evaluation
CustomXsltContext customContext = CreateCustomXsltContext(templateData.IgnoredVersionComponent);
XElement[] paramNodes = workingDoc.Root.Elements("parameter").ToArray();
var globalParams =
paramNodes.Select(paramNode =>
new ExpressionXPathVariable(this.GetAttributeValue(paramNode, "name"),
this.GetAttributeValueOrDefault(paramNode, "select")))
.ToArray();
customContext.PushVariableScope(workingDoc, globalParams);
var arguments = templateData.Arguments
.Select(argument => new ConstantXPathVariable(argument.Key, argument.Value))
.ToArray();
customContext.PushVariableScope(workingDoc, arguments);
// we're going to need this later
XmlFileProviderResolver fileResolver = new XmlFileProviderResolver(providers, this._basePath);
// expand any meta-template directives
workingDoc = ApplyMetaTransforms(workingDoc, customContext, providers, tempFiles);
// there was neither inheretance, nor any meta-template directives
if (this._templateSourcePath == null)
{
// save current template to disk
this._templateSourcePath = this.SaveTempFile(tempFiles, workingDoc);
}
// loading template
List<Stylesheet> stylesheets = new List<Stylesheet>();
List<Resource> resources = new List<Resource>();
List<Index> indices = new List<Index>();
foreach (XElement elem in workingDoc.Root.Elements())
{
// we alread proessed the parameters
if (elem.Name.LocalName == "parameter")
continue;
if (elem.Name.LocalName == "apply-stylesheet")
{
stylesheets.Add(this.ParseStylesheet(providers, stylesheets, elem));
}
else if (elem.Name.LocalName == "index")
{
indices.Add(this.ParseIndexDefinition(elem));
}
else if (elem.Name.LocalName == "include-resource")
{
resources.Add(ParseResouceDefinition(providers, elem));
}
else
{
throw new Exception("Unknown element: " + elem.Name.LocalName);
}
}
return new ParsedTemplate
{
Parameters = globalParams,
Source = workingDoc,
Resources = resources.ToArray(),
Stylesheets = stylesheets.ToArray(),
Indices = indices.ToArray(),
TemporaryFiles = tempFiles,
};
}
/// <summary>
/// The load stylesheet.
/// </summary>
/// <param name="fileProvider"><see cref="IFileProvider"/> used to load the stylesheet.</param>
/// <param name="name">
/// </param>
/// <returns>
/// </returns>
private XslCompiledTransform LoadStylesheet(IFileProvider fileProvider, string name)
{
XslCompiledTransform ret = new XslCompiledTransform(true);
using (Stream str = fileProvider.OpenFile(name, FileMode.Open))
{
XmlReader reader = XmlReader.Create(str, new XmlReaderSettings { CloseInput = true, });
XsltSettings settings = new XsltSettings(false, true);
XmlResolver resolver = new XmlFileProviderResolver(fileProvider);
ret.Load(reader, settings, resolver);
}
return ret;
}
/// <summary>
/// The load stylesheet.
/// </summary>
/// <param name="resourceProvider"></param>
/// <param name="name">
/// </param>
/// <returns>
/// </returns>
private XslCompiledTransform LoadStylesheet(Stack<IFileProvider> resourceProvider, string name)
{
XslCompiledTransform ret = new XslCompiledTransform(true);
foreach (var provider in resourceProvider)
{
if (provider.FileExists(name))
{
using (Stream str = provider.OpenFile(name, FileMode.Open))
{
XmlReader reader = XmlReader.Create(str, new XmlReaderSettings {CloseInput = true,});
XsltSettings settings = new XsltSettings(false, true);
XmlResolver resolver = new XmlFileProviderResolver(resourceProvider);
ret.Load(reader, settings, resolver);
}
break;
}
}
return ret;
}
