/// <summary>Compiles an assembly that contains one class per each distinct expression found in given template.</summary>
public static TemplateExpressionFactory CompileExpressions(Template template)
{
TemplateCompilation compilation = GenerateAssemblySourceCode(template);
Assembly asm = CompileAssembly(template, compilation);
TemplateExpressionFactory compiledExpressionFactory = new TemplateExpressionFactory(asm);
return compiledExpressionFactory;
}
private static Assembly CompileAssembly(Template template, TemplateCompilation compilation)
{
string source = compilation.SourceCode;
Assembly cachedAssembly = TemplateExpressionAssemblyCache.GetAssembly(source);
if (cachedAssembly != null)
return cachedAssembly;
CompilerParameters config = new CompilerParameters() { GenerateInMemory = true };
foreach (string asmName in template.ReferencedAssemblies)
config.ReferencedAssemblies.Add(asmName);
if (!config.ReferencedAssemblies.Contains("FistCore.Generator.TemplateEngine.dll"))
config.ReferencedAssemblies.Add("FistCore.Generator.TemplateEngine.dll");
if (!config.ReferencedAssemblies.Contains("FistCore.Core.dll"))
config.ReferencedAssemblies.Add("FistCore.Core.dll");
Dictionary<string, string> options = new Dictionary<string, string>();
options["CompilerVersion"] = "v3.5";
Microsoft.CSharp.CSharpCodeProvider compiler = new Microsoft.CSharp.CSharpCodeProvider(options);
//CodeDomProvider compiler = CodeDomProvider.CreateProvider("CSharp");
// All referenced assemblies must be in the same directory as entry assembly.
string oldCwd = Directory.GetCurrentDirectory();
Directory.SetCurrentDirectory(IoUtil.GetExecutableDirectory());
CompilerResults output = compiler.CompileAssemblyFromSource(config, source);
Directory.SetCurrentDirectory(oldCwd);
if (output.Errors.HasErrors)
{
SetCompilerErrors(compilation, output.Errors);
string errmsg = compilation.GetCompilationErrorsDescription();
throw new Exception(template.Header.Title + Environment.NewLine + errmsg);
}
TemplateExpressionAssemblyCache.SetAssembly(source, output.CompiledAssembly);
return output.CompiledAssembly;
}
private static void GenerateUsingDirectives(Template template, StringBuilder asmSource)
{
bool usesSystem = ArrayUtil.Exists<string>(template.Namespaces, (ns) => (ns == "System"));
if (!usesSystem)
asmSource.AppendLine("using System;");
foreach (string name in template.Namespaces)
{
asmSource.AppendFormat("using {0};", name);
asmSource.AppendLine();
}
if (template.Namespaces.Length > 0)
asmSource.AppendLine();
}
private static TemplateCompilation GenerateAssemblySourceCode(Template template)
{
// One class (ITemplateExpression implementation) per expression.
List<string> allDistinctExpressions = GetAllDistinctExpressions(template);
TemplateCompilation compilation = new TemplateCompilation();
StringBuilder asmSource = new StringBuilder();
GenerateUsingDirectives(template, asmSource);
asmSource.AppendLine(NamespaceDeclaration);
asmSource.AppendLine(" {");
List<string> generatedClassNames = new List<string>();
int firstLineOfCurrClass = TextUtil.CountLines(asmSource.ToString()) + 1;
foreach (string expression in allDistinctExpressions)
{
string className = CreateUniqueClassName(expression);
if (!generatedClassNames.Contains(className))
{
string classSourceCode = GenerateExpressionClassSource(className, expression);
asmSource.AppendLine(classSourceCode);
int currClassLineCount = TextUtil.CountLines(classSourceCode);
ExpressionCompilationItem compilationItem = new ExpressionCompilationItem()
{
ClassFirstLineInSourceFile = firstLineOfCurrClass,
ClassLastLineInSourceFile = firstLineOfCurrClass + currClassLineCount,
//ClassName = className,
//ClassSourceCode = classSourceCode,
Expression = expression,
XmlLine = template.XmlLines.GetLineWithText(expression)
};
compilation.Expressions.Add(compilationItem);
// 1st line of next class.
firstLineOfCurrClass = compilationItem.ClassLastLineInSourceFile + 1;
}
}
asmSource.AppendLine(" }");
compilation.SourceCode = asmSource.ToString();
return compilation;
}
private static List<string> GetAllDistinctExpressions(Template template)
{
List<string> allDistinctExpressions = new List<string>();
foreach (TemplateSegment segment in template.Segments)
{
var nonDistinctExpressions = GetAllExpressionsFromSegmentBody(segment.Body);
foreach (string expression in nonDistinctExpressions)
{
bool isNewExpression = !allDistinctExpressions.Contains(expression);
if (isNewExpression)
allDistinctExpressions.Add(expression);
}
}
return allDistinctExpressions;
}
private void TryLoadSelectedTemplate()
{
if (File.Exists(this.uiTemplatePath.Text))
{
Template template = new Template();
template.ReadXml(this.uiTemplatePath.Text);
SetNewTemplateIfChanged(template);
}
}
/// <summary>Initializes expression. This method can only be called once.</summary>
/// <param name="template">Template to which the current expression belongs to. This expression implementation only supports <see cref="Template"/> class.</param>
/// <param name="input">Input component.</param>
void ITemplateExpression.Initialize(ITemplate template, ITemplateInputComponent input)
{
if (this.isInitialized)
throw new InvalidOperationException("The expression is already initialized.");
this.template = (Template)template;
this.Variables = new TemplateVariableCollection(template.Variables);
this.Input = input;
this.isInitialized = true;
}