static void InitializeSre()
{
if (_sreTypeSystem == null)
{
_sreTypeSystem = new SreTypeSystem();
}
if (_sreBuilder == null)
{
_sreCanSave = !(RuntimeInformation.FrameworkDescription.StartsWith(".NET Core"));
var name = new AssemblyName(Guid.NewGuid().ToString("N"));
if (_sreCanSave)
{
var define = AppDomain.CurrentDomain.GetType().GetMethods()
.FirstOrDefault(m => m.Name == "DefineDynamicAssembly" &&
m.GetParameters().Length == 3 &&
m.GetParameters()[2].ParameterType == typeof(string));
if (define != null)
{
_sreAsm = (AssemblyBuilder)define.Invoke(AppDomain.CurrentDomain, new object[]
{
name, (AssemblyBuilderAccess)3,
Path.GetDirectoryName(typeof(AvaloniaXamlIlRuntimeCompiler).Assembly.GetModules()[0]
.FullyQualifiedName)
});
}
else
{
_sreCanSave = false;
}
}
if (_sreAsm == null)
{
_sreAsm = AssemblyBuilder.DefineDynamicAssembly(name,
AssemblyBuilderAccess.RunAndCollect);
}
_sreBuilder = _sreAsm.DefineDynamicModule("XamlIlLoader.ildump");
}
if (_sreMappings == null)
{
_sreMappings = AvaloniaXamlIlLanguage.Configure(_sreTypeSystem);
}
if (_sreXmlns == null)
{
_sreXmlns = XamlIlXmlnsMappings.Resolve(_sreTypeSystem, _sreMappings);
}
if (_sreContextType == null)
{
_sreContextType = XamlIlContextDefinition.GenerateContextClass(
_sreTypeSystem.CreateTypeBuilder(
_sreBuilder.DefineType("XamlIlContext")), _sreTypeSystem, _sreMappings);
}
}
public static CompileResult Compile(IBuildEngine engine, string input, string[] references, string projectDirectory,
string output)
{
var typeSystem = new CecilTypeSystem(references.Concat(new[] { input }), input);
var asm = typeSystem.TargetAssemblyDefinition;
var emres = new EmbeddedResources(asm);
var avares = new AvaloniaResources(asm, projectDirectory);
if (avares.Resources.Count(CheckXamlName) == 0 && emres.Resources.Count(CheckXamlName) == 0)
{
// Nothing to do
return(new CompileResult(true));
}
var xamlLanguage = AvaloniaXamlIlLanguage.Configure(typeSystem);
var compilerConfig = new XamlIlTransformerConfiguration(typeSystem,
typeSystem.TargetAssembly,
xamlLanguage,
XamlIlXmlnsMappings.Resolve(typeSystem, xamlLanguage),
AvaloniaXamlIlLanguage.CustomValueConverter);
var contextDef = new TypeDefinition("CompiledAvaloniaXaml", "XamlIlContext",
TypeAttributes.Class, asm.MainModule.TypeSystem.Object);
asm.MainModule.Types.Add(contextDef);
var contextClass = XamlIlContextDefinition.GenerateContextClass(typeSystem.CreateTypeBuilder(contextDef), typeSystem,
xamlLanguage);
var compiler = new AvaloniaXamlIlCompiler(compilerConfig, contextClass);
var editorBrowsableAttribute = typeSystem
.GetTypeReference(typeSystem.FindType("System.ComponentModel.EditorBrowsableAttribute"))
.Resolve();
var editorBrowsableCtor =
asm.MainModule.ImportReference(editorBrowsableAttribute.GetConstructors()
.First(c => c.Parameters.Count == 1));
var runtimeHelpers = typeSystem.GetType("Avalonia.Markup.Xaml.XamlIl.Runtime.XamlIlRuntimeHelpers");
var createRootServiceProviderMethod = asm.MainModule.ImportReference(
typeSystem.GetTypeReference(runtimeHelpers).Resolve().Methods
.First(x => x.Name == "CreateRootServiceProviderV2"));
var loaderDispatcherDef = new TypeDefinition("CompiledAvaloniaXaml", "!XamlLoader",
TypeAttributes.Class, asm.MainModule.TypeSystem.Object);
loaderDispatcherDef.CustomAttributes.Add(new CustomAttribute(editorBrowsableCtor)
{
ConstructorArguments = { new CustomAttributeArgument(editorBrowsableCtor.Parameters[0].ParameterType, 1) }
});
var loaderDispatcherMethod = new MethodDefinition("TryLoad",
MethodAttributes.Static | MethodAttributes.Public,
asm.MainModule.TypeSystem.Object)
{
Parameters = { new ParameterDefinition(asm.MainModule.TypeSystem.String) }
};
loaderDispatcherDef.Methods.Add(loaderDispatcherMethod);
asm.MainModule.Types.Add(loaderDispatcherDef);
var stringEquals = asm.MainModule.ImportReference(asm.MainModule.TypeSystem.String.Resolve().Methods.First(
m =>
m.IsStatic && m.Name == "Equals" && m.Parameters.Count == 2 &&
m.ReturnType.FullName == "System.Boolean" &&
m.Parameters[0].ParameterType.FullName == "System.String" &&
m.Parameters[1].ParameterType.FullName == "System.String"));
bool CompileGroup(IResourceGroup group)
{
var typeDef = new TypeDefinition("CompiledAvaloniaXaml", "!" + group.Name,
TypeAttributes.Class, asm.MainModule.TypeSystem.Object);
typeDef.CustomAttributes.Add(new CustomAttribute(editorBrowsableCtor)
{
ConstructorArguments = { new CustomAttributeArgument(editorBrowsableCtor.Parameters[0].ParameterType, 1) }
});
asm.MainModule.Types.Add(typeDef);
var builder = typeSystem.CreateTypeBuilder(typeDef);
foreach (var res in group.Resources.Where(CheckXamlName))
{
try
{
// StreamReader is needed here to handle BOM
var xaml = new StreamReader(new MemoryStream(res.FileContents)).ReadToEnd();
var parsed = XDocumentXamlIlParser.Parse(xaml);
var initialRoot = (XamlIlAstObjectNode)parsed.Root;
var precompileDirective = initialRoot.Children.OfType <XamlIlAstXmlDirective>()
.FirstOrDefault(d => d.Namespace == XamlNamespaces.Xaml2006 && d.Name == "Precompile");
if (precompileDirective != null)
{
var precompileText = (precompileDirective.Values[0] as XamlIlAstTextNode)?.Text.Trim()
.ToLowerInvariant();
if (precompileText == "false")
{
continue;
}
if (precompileText != "true")
{
throw new XamlIlParseException("Invalid value for x:Precompile", precompileDirective);
}
}
var classDirective = initialRoot.Children.OfType <XamlIlAstXmlDirective>()
.FirstOrDefault(d => d.Namespace == XamlNamespaces.Xaml2006 && d.Name == "Class");
IXamlIlType classType = null;
if (classDirective != null)
{
if (classDirective.Values.Count != 1 || !(classDirective.Values[0] is XamlIlAstTextNode tn))
{
throw new XamlIlParseException("x:Class should have a string value", classDirective);
}
classType = typeSystem.TargetAssembly.FindType(tn.Text);
if (classType == null)
{
throw new XamlIlParseException($"Unable to find type `{tn.Text}`", classDirective);
}
compiler.OverrideRootType(parsed,
new XamlIlAstClrTypeReference(classDirective, classType, false));
initialRoot.Children.Remove(classDirective);
}
compiler.Transform(parsed);
var populateName = classType == null ? "Populate:" + res.Name : "!XamlIlPopulate";
var buildName = classType == null ? "Build:" + res.Name : null;
var classTypeDefinition =
classType == null ? null : typeSystem.GetTypeReference(classType).Resolve();
var populateBuilder = classTypeDefinition == null ?
builder :
typeSystem.CreateTypeBuilder(classTypeDefinition);
compiler.Compile(parsed, contextClass,
compiler.DefinePopulateMethod(populateBuilder, parsed, populateName,
classTypeDefinition == null),
buildName == null ? null : compiler.DefineBuildMethod(builder, parsed, buildName, true),
builder.DefineSubType(compilerConfig.WellKnownTypes.Object, "NamespaceInfo:" + res.Name,
true),
(closureName, closureBaseType) =>
populateBuilder.DefineSubType(closureBaseType, closureName, false),
res.Uri, res
);
if (classTypeDefinition != null)
{
var compiledPopulateMethod = typeSystem.GetTypeReference(populateBuilder).Resolve()
.Methods.First(m => m.Name == populateName);
var designLoaderFieldType = typeSystem
.GetType("System.Action`1")
.MakeGenericType(typeSystem.GetType("System.Object"));
var designLoaderFieldTypeReference = (GenericInstanceType)typeSystem.GetTypeReference(designLoaderFieldType);
designLoaderFieldTypeReference.GenericArguments[0] =
asm.MainModule.ImportReference(designLoaderFieldTypeReference.GenericArguments[0]);
designLoaderFieldTypeReference = (GenericInstanceType)
asm.MainModule.ImportReference(designLoaderFieldTypeReference);
var designLoaderLoad =
typeSystem.GetMethodReference(
designLoaderFieldType.Methods.First(m => m.Name == "Invoke"));
designLoaderLoad =
asm.MainModule.ImportReference(designLoaderLoad);
designLoaderLoad.DeclaringType = designLoaderFieldTypeReference;
var designLoaderField = new FieldDefinition("!XamlIlPopulateOverride",
FieldAttributes.Static | FieldAttributes.Private, designLoaderFieldTypeReference);
classTypeDefinition.Fields.Add(designLoaderField);
const string TrampolineName = "!XamlIlPopulateTrampoline";
var trampoline = new MethodDefinition(TrampolineName,
MethodAttributes.Static | MethodAttributes.Private, asm.MainModule.TypeSystem.Void);
trampoline.Parameters.Add(new ParameterDefinition(classTypeDefinition));
classTypeDefinition.Methods.Add(trampoline);
var regularStart = Instruction.Create(OpCodes.Call, createRootServiceProviderMethod);
trampoline.Body.Instructions.Add(Instruction.Create(OpCodes.Ldsfld, designLoaderField));
trampoline.Body.Instructions.Add(Instruction.Create(OpCodes.Brfalse, regularStart));
trampoline.Body.Instructions.Add(Instruction.Create(OpCodes.Ldsfld, designLoaderField));
trampoline.Body.Instructions.Add(Instruction.Create(OpCodes.Ldarg_0));
trampoline.Body.Instructions.Add(Instruction.Create(OpCodes.Call, designLoaderLoad));
trampoline.Body.Instructions.Add(Instruction.Create(OpCodes.Ret));
trampoline.Body.Instructions.Add(regularStart);
trampoline.Body.Instructions.Add(Instruction.Create(OpCodes.Ldarg_0));
trampoline.Body.Instructions.Add(Instruction.Create(OpCodes.Call, compiledPopulateMethod));
trampoline.Body.Instructions.Add(Instruction.Create(OpCodes.Ret));
CopyDebugDocument(trampoline, compiledPopulateMethod);
var foundXamlLoader = false;
// Find AvaloniaXamlLoader.Load(this) and replace it with !XamlIlPopulateTrampoline(this)
foreach (var method in classTypeDefinition.Methods
.Where(m => !m.Attributes.HasFlag(MethodAttributes.Static)))
{
var i = method.Body.Instructions;
for (var c = 1; c < i.Count; c++)
{
if (i[c].OpCode == OpCodes.Call)
{
var op = i[c].Operand as MethodReference;
// TODO: Throw an error
// This usually happens when same XAML resource was added twice for some weird reason
// We currently support it for dual-named default theme resource
if (op != null &&
op.Name == TrampolineName)
{
foundXamlLoader = true;
break;
}
if (op != null &&
op.Name == "Load" &&
op.Parameters.Count == 1 &&
op.Parameters[0].ParameterType.FullName == "System.Object" &&
op.DeclaringType.FullName == "Avalonia.Markup.Xaml.AvaloniaXamlLoader")
{
if (MatchThisCall(i, c - 1))
{
i[c].Operand = trampoline;
foundXamlLoader = true;
}
}
}
}
}
if (!foundXamlLoader)
{
var ctors = classTypeDefinition.GetConstructors()
.Where(c => !c.IsStatic).ToList();
// We can inject xaml loader into default constructor
if (ctors.Count == 1 && ctors[0].Body.Instructions.Count(o => o.OpCode != OpCodes.Nop) == 3)
{
var i = ctors[0].Body.Instructions;
var retIdx = i.IndexOf(i.Last(x => x.OpCode == OpCodes.Ret));
i.Insert(retIdx, Instruction.Create(OpCodes.Call, trampoline));
i.Insert(retIdx, Instruction.Create(OpCodes.Ldarg_0));
}
else
{
throw new InvalidProgramException(
$"No call to AvaloniaXamlLoader.Load(this) call found anywhere in the type {classType.FullName} and type seems to have custom constructors.");
}
}
}
if (buildName != null || classTypeDefinition != null)
{
var compiledBuildMethod = buildName == null ?
null :
typeSystem.GetTypeReference(builder).Resolve()
.Methods.First(m => m.Name == buildName);
var parameterlessConstructor = compiledBuildMethod != null ?
null :
classTypeDefinition.GetConstructors().FirstOrDefault(c =>
c.IsPublic && !c.IsStatic && !c.HasParameters);
if (compiledBuildMethod != null || parameterlessConstructor != null)
{
var i = loaderDispatcherMethod.Body.Instructions;
var nop = Instruction.Create(OpCodes.Nop);
i.Add(Instruction.Create(OpCodes.Ldarg_0));
i.Add(Instruction.Create(OpCodes.Ldstr, res.Uri));
i.Add(Instruction.Create(OpCodes.Call, stringEquals));
i.Add(Instruction.Create(OpCodes.Brfalse, nop));
if (parameterlessConstructor != null)
{
i.Add(Instruction.Create(OpCodes.Newobj, parameterlessConstructor));
}
else
{
i.Add(Instruction.Create(OpCodes.Call, createRootServiceProviderMethod));
i.Add(Instruction.Create(OpCodes.Call, compiledBuildMethod));
}
i.Add(Instruction.Create(OpCodes.Ret));
i.Add(nop);
}
}
}
catch (Exception e)
{
int lineNumber = 0, linePosition = 0;
if (e is XamlIlParseException xe)
{
lineNumber = xe.LineNumber;
linePosition = xe.LinePosition;
}
engine.LogErrorEvent(new BuildErrorEventArgs("Avalonia", "XAMLIL", res.FilePath,
lineNumber, linePosition, lineNumber, linePosition,
e.Message, "", "Avalonia"));
return(false);
}
res.Remove();
}
return(true);
}
if (emres.Resources.Count(CheckXamlName) != 0)
{
if (!CompileGroup(emres))
{
return(new CompileResult(false));
}
}
if (avares.Resources.Count(CheckXamlName) != 0)
{
if (!CompileGroup(avares))
{
return(new CompileResult(false));
}
avares.Save();
}
loaderDispatcherMethod.Body.Instructions.Add(Instruction.Create(OpCodes.Ldnull));
loaderDispatcherMethod.Body.Instructions.Add(Instruction.Create(OpCodes.Ret));
asm.Write(output, new WriterParameters
{
WriteSymbols = asm.MainModule.HasSymbols
});
return(new CompileResult(true, true));
}