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// Copyright © Microsoft Corporation.
// This source file is subject to the Microsoft Permissive License.
// See http://www.microsoft.com/resources/sharedsource/licensingbasics/sharedsourcelicenses.mspx.
// All other rights reserved.
using System;
using System.Collections.Generic;
using System.Configuration;
using System.IO;
using System.Reflection;
using System.Xml;
using System.Xml.XPath;
namespace Microsoft.Ddue.Tools {
public class SyntaxComponent : BuildComponent {
public SyntaxComponent (BuildAssembler assembler, XPathNavigator configuration) : base(assembler, configuration) {
XPathNavigator syntax_node = configuration.SelectSingleNode("syntax");
string syntax_input_xpath = syntax_node.GetAttribute("input", String.Empty);
if (String.IsNullOrEmpty(syntax_input_xpath)) throw new ConfigurationErrorsException("You must specify an XPath for input in the syntax element.");
syntax_input = XPathExpression.Compile(syntax_input_xpath);
string syntax_output_xpath = syntax_node.GetAttribute("output", String.Empty);
if (String.IsNullOrEmpty(syntax_output_xpath)) throw new ConfigurationErrorsException("You must specify an XPath for output in the syntax element.");
syntax_output = XPathExpression.Compile(syntax_output_xpath);
writerType = typeof(ManagedSyntaxWriter);
//if (writerType == null) Console.WriteLine("null writer");
XPathNodeIterator generator_nodes = configuration.Select("generators/generator");
foreach (XPathNavigator generator_node in generator_nodes) {
// get the data to load the generator
string assembly_path = generator_node.GetAttribute("assembly", String.Empty);
if (String.IsNullOrEmpty(assembly_path)) WriteMessage(MessageLevel.Error, "Each generator element must have an assembly attribute.");
string type_name = generator_node.GetAttribute("type", String.Empty);
if (String.IsNullOrEmpty(type_name)) WriteMessage(MessageLevel.Error, "Each generator element must have a type attribute.");
// expand environment variables in the path
assembly_path = Environment.ExpandEnvironmentVariables(assembly_path);
//Console.WriteLine("loading {0} from {1}", type_name, assembly_path);
try {
Assembly assembly = Assembly.LoadFrom(assembly_path);
SyntaxGenerator generator = (SyntaxGenerator)assembly.CreateInstance(type_name, false, BindingFlags.Public | BindingFlags.Instance, null, new Object[1] { generator_node.Clone() }, null, null);
if (generator == null) {
WriteMessage(MessageLevel.Error, String.Format("The type '{0}' does not exist in the assembly '{1}'.", type_name, assembly_path));
} else {
generators.Add(generator);
}
} catch (IOException e) {
WriteMessage(MessageLevel.Error, String.Format("A file access error occured while attempting to load the build component '{0}'. The error message is: {1}", assembly_path, e.Message));
} catch (BadImageFormatException e) {
WriteMessage(MessageLevel.Error, String.Format("A syntax generator assembly '{0}' is invalid. The error message is: {1}.", assembly_path, e.Message));
} catch (TypeLoadException e) {
WriteMessage(MessageLevel.Error, String.Format("The type '{0}' does not exist in the assembly '{1}'. The error message is: {2}", type_name, assembly_path, e.Message));
} catch (MissingMethodException e) {
WriteMessage(MessageLevel.Error, String.Format("The type '{0}' in the assembly '{1}' does not have an appropriate constructor. The error message is: {2}", type_name, assembly_path, e.Message));
} catch (TargetInvocationException e) {
WriteMessage(MessageLevel.Error, String.Format("An error occured while attempting to instantiate the type '{0}' in the assembly '{1}'. The error message is: {2}", type_name, assembly_path, e.InnerException.Message));
} catch (InvalidCastException) {
WriteMessage(MessageLevel.Error, String.Format("The type '{0}' in the assembly '{1}' is not a SyntaxGenerator.", type_name, assembly_path));
}
}
WriteMessage(MessageLevel.Info, String.Format("Loaded {0} syntax generators.", generators.Count));
}
private XPathExpression syntax_input;
private XPathExpression syntax_output;
private Type writerType;
private List<SyntaxGenerator> generators = new List<SyntaxGenerator>();
public override void Apply (XmlDocument document, string key) {
XPathNavigator input = document.CreateNavigator().SelectSingleNode(syntax_input);
if (input == null) Console.WriteLine("null input");
XPathNavigator output = document.CreateNavigator().SelectSingleNode(syntax_output);
if (output == null) Console.WriteLine("null output");
SyntaxWriter writer = (SyntaxWriter) Activator.CreateInstance(writerType, new Object[1] { output });
foreach (SyntaxGenerator generator in generators) {
generator.WriteSyntax(input, writer);
}
}
}
// the writer
public abstract class SyntaxWriter {
protected SyntaxWriter (XPathNavigator location) {}
// Syntax block APIs
public virtual int Position {
get {
return (-1);
}
}
public abstract void WriteStartBlock(string language);
public abstract void WriteStartSubBlock(string classId);
public abstract void WriteEndSubBlock();
public abstract void WriteString(string text);
public abstract void WriteStringWithStyle (string text, string style);
public abstract void WriteReferenceLink (string reference);
public abstract void WriteReferenceLink (string reference, string text);
public virtual void WriteLine () {
WriteString("\n");
}
public virtual void WriteKeyword (string keyword) {
WriteStringWithStyle(keyword, "keyword");
}
public virtual void WriteParameter (string parameter) {
WriteStringWithStyle(parameter, "parameter");
}
public virtual void WriteIdentifier (string identifier) {
WriteStringWithStyle(identifier, "identifier");
}
public virtual void WriteLiteral (string literal) {
WriteStringWithStyle(literal, "literal");
}
public virtual void WriteMessage(string message)
{
WriteMessage(message, null);
}
public abstract void WriteMessage(string message, IEnumerable<string> parameters);
public abstract void WriteEndBlock();
}
// the concrete writer
// the should really be moved out
public class ManagedSyntaxWriter : SyntaxWriter {
public ManagedSyntaxWriter (XPathNavigator location) : base(location) {
if (location == null) Console.WriteLine("null location");
this.location = location;
}
XPathNavigator location;
XmlWriter writer;
// position along the line
int position = 0;
public override int Position {
get {
return (position);
}
}
public override void WriteStartBlock(string language)
{
writer = location.AppendChild();
writer.WriteStartElement("div");
writer.WriteAttributeString("codeLanguage", language);
position = 0;
}
public override void WriteStartSubBlock(string classId)
{
writer.WriteStartElement("div");
writer.WriteAttributeString("class", classId);
position = 0;
}
public override void WriteEndSubBlock()
{
writer.WriteEndElement();
position = 0;
}
public override void WriteLine () {
base.WriteLine();
position = 0;
}
public override void WriteString(string text)
{
writer.WriteString(text);
position += text.Length;
}
public override void WriteStringWithStyle (string text, string style) {
writer.WriteStartElement("span");
writer.WriteAttributeString("class", style);
WriteString(text);
writer.WriteEndElement();
position += text.Length;
}
public override void WriteReferenceLink (string reference) {
writer.WriteStartElement("referenceLink");
writer.WriteAttributeString("target", reference);
writer.WriteAttributeString("prefer-overload", "false");
writer.WriteAttributeString("show-container", "false");
writer.WriteAttributeString("show-templates", "false");
writer.WriteAttributeString("show-parameters", "false");
writer.WriteEndElement();
position += 10; // approximate
}
public override void WriteReferenceLink (string reference, string text) {
writer.WriteStartElement("referenceLink");
writer.WriteAttributeString("target", reference);
writer.WriteAttributeString("prefer-overload", "false");
writer.WriteAttributeString("show-container", "false");
writer.WriteAttributeString("show-templates", "false");
writer.WriteAttributeString("show-parameters", "false");
writer.WriteString(text);
writer.WriteEndElement();
position += text.Length;
}
public override void WriteEndBlock () {
writer.WriteEndElement();
writer.Close();
position = 0;
}
public override void WriteMessage(string message, IEnumerable<string> parameters)
{
writer.WriteStartElement("span");
writer.WriteAttributeString("class", "message");
writer.WriteStartElement("include");
writer.WriteAttributeString("item", message);
if (parameters != null)
{
foreach (string parameter in parameters)
{
writer.WriteStartElement("parameter");
writer.WriteRaw(parameter);
writer.WriteEndElement();
}
}
writer.WriteEndElement();
writer.WriteEndElement();
}
}
// the abstract generator
public abstract class SyntaxGenerator {
protected SyntaxGenerator (XPathNavigator configuration) { }
public abstract void WriteSyntax (XPathNavigator reflection, SyntaxWriter writer);
}
}
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