private void EmitMethod(DeclarationEmitContext dgc, string id, IEnumerable<ParameterSyntax> parameters, SyntaxNode body)
{
var ltype = dgc.LType;
var qname = ltype.ID + "." + id;
TraceEmit(" method '{0}' ...", id);
var rtype = ltype.RType;
var ps = TranslateMethodParameters(parameters);
var jsw = new JScriptWriter();
jsw.Write(GetPrototypeClause(ltype, id) + " = function(" + ps + ")");
// method context
var context = ModuleFactory.CreateMethodContext((IDeclarationContext)ltype);
// CS to JS rewriter using the method context.
var rewriter = CreateRewriter(dgc, context);
// parameter variables
rewriter.AddMethodParameters(parameters);
if (null == body)
{
Trace("WARNING: method " + id + " has no body.");
return;
}
// convert the method body
var node = rewriter.Visit(body);
// prefix with the 'this' replacement
node = AddLambdaThis(node);
// and emit the JS method declaration
jsw.WriteLine(node.ToString());
dgc.Writer.Write(jsw);
}
private void EmitConstructor(DeclarationEmitContext dgc, IEnumerable<string> autoprops)
{
var ltype = dgc.LType;
var rtype = ltype.RType;
var typename = ltype.CodeName;
var declctx = (IDeclarationContext)ltype;
// method context for constructor
var context = ModuleFactory.CreateMethodContext(declctx);
// rewriter
var rewriter = CreateRewriter(dgc, context);
// writer receiving constructor and related code.
JScriptWriter jsw = new JScriptWriter();
// initialize the prototype
string basename = null;
if (null != ltype.BaseType)
{
if (null != ltype.BaseType.RType)
{
basename = ltype.BaseType.CodeName;
jsw.WriteLine(typename + ".prototype = new " + basename + "();");
jsw.WriteLine(typename + ".prototype.constructor = " + typename + ";");
}
}
// static
EmitStaticInitializer(dgc, jsw);
// analyze constructors ...
var cls = dgc.Source.ClassDeclaration;
var constructors = cls.Members.OfType<ConstructorDeclarationSyntax>();
if (constructors.Count() > 1)
{
throw new Exception("multiple constructors are not supported [" + typename + "].");
}
var constructor = constructors.FirstOrDefault();
var ps = string.Empty;
if (null != constructor)
{
var parameters = constructor.ParameterList.ChildNodes().OfType<ParameterSyntax>();
rewriter.AddMethodParameters(parameters);
ps = TranslateMethodParameters(parameters);
}
// constructor method
jsw.WriteLine("function " + typename + "(" + ps + ")");
jsw.EnterBlock();
// call base constructor
if (null != basename)
{
jsw.WriteLine(basename + ".prototype.constructor.call(this);");
}
// type identifier
jsw.WriteLine("this.$type = '" + typename + "';");
// initialize our 'this' replacement.
var cthis = CreateLambdaThis();
jsw.Write(cthis.ToString());
foreach (var ap in autoprops)
{
jsw.Write(Settings.OuterThis + "." + DeriveAutomaticName(ap) + " = null;");
}
foreach (var dp in dgc.DependencyPropertyInitializations)
{
// TODO: constant management required.
//var dvalue = dp.DefaultMetadata.DefaultValue;
object dvalue = null;
if (null == dvalue)
{
jsw.Write(Settings.OuterThis + ".InitValue(\"" + dp.Name + "\");");
}
else
{
jsw.Write(Settings.OuterThis + ".InitValue(\"" + dp.Name + "\", " + dvalue + ");");
}
}
// field initializers and constructor body ...
EmitConstructorFields(dgc, rewriter, jsw);
jsw.LeaveBlock();
// commit to class output
dgc.Writer.Write(jsw);
}
private void EmitDependencyPropertyDefinitions(JScriptWriter jsw, List<DependencyProperty> dplist)
{
foreach (var dp in dplist)
{
var dptype = dp.PropertyType;
var ldptype = _context.TranslateRType(dptype, TranslateOptions.MustExist);
var convert = ldptype.GetConvertMethod();
jsw.Write(dp.Name + "Property:");
jsw.EnterBlock();
jsw.WriteLine("Type: \"" + ldptype.ID + "\",");
if (null != convert)
{
jsw.WriteLine("Convert: function(p) { return " + convert.ID + "(p); },");
}
jsw.LeaveBlock();
jsw.WriteLine(",");
}
}
private void EmitConstructorFields(DeclarationEmitContext dgc, CSharpToJScriptRewriter rewriter, JScriptWriter jsw)
{
var info = dgc.LType;
var rtype = info.RType;
var cls = dgc.Source.ClassDeclaration;
// emit class member fields (LN4NL4H5PI)
foreach (var fielddecl in cls.ChildNodes().OfType<FieldDeclarationSyntax>())
{
foreach (var declarator in fielddecl.DescendantNodes().OfType<VariableDeclaratorSyntax>())
{
var id = declarator.Identifier.ToString();
if (null != rtype)
{
var field = rtype.GetField(id, BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic);
if (null != field && field.IsStatic)
{
continue;
}
}
// identifier, prepend 'this'.
//var idsyntax = SyntaxFactory.IdentifierName(declarator.Identifier);
var idsyntax = SyntaxFactory.MemberAccessExpression(SyntaxKind.SimpleMemberAccessExpression,
SyntaxFactory.IdentifierName(Settings.OuterThis),
SyntaxFactory.IdentifierName(declarator.Identifier)
);
var idnode = rewriter.Visit(idsyntax);
jsw.Write(idnode.ToString());
var equals = declarator.ChildNodes().FirstOrDefault();
if (null != equals)
{
var node = rewriter.Visit(equals);
jsw.Write(node.ToString());
}
else
{
jsw.Write(" = null");
}
jsw.WriteLine(";");
}
}
// event objects (LMGMELDMQ7)
foreach (var ev in cls.Members.OfType<EventFieldDeclarationSyntax>())
{
foreach (var v in ev.Declaration.Variables)
{
// initialize event object to null, as in C#
var id = Settings.OuterThis + "." + v.Identifier;
jsw.WriteLine(id + " = null;");
jsw.WriteLine("this.add_" + v.Identifier + " = function(h) {");
jsw.WriteLine(id + " = Delegate.Combine(" + id + ", h); };");
jsw.WriteLine("this.remove_" + v.Identifier + " = function(h) {");
jsw.WriteLine(id + " = Delegate.Remove(" + id + ", h); };");
jsw.WriteLine("this.fire_" + v.Identifier + " = function(sender, e) {");
jsw.WriteLine("Delegate.Fire(" + id + ", sender, e); };");
}
}
// constructor
var constructor = cls.Members.OfType<ConstructorDeclarationSyntax>().FirstOrDefault();
if (null != constructor)
{
foreach (var stmt in constructor.Body.Statements)
{
var ctor = rewriter.Visit(stmt);
// ctor = AddLambdaThis(ctor);
jsw.Write(ctor.ToString());
}
}
}
private void EmitScript(XmlWriter writer)
{
EmitScriptIncludesBefore(writer);
var code = new JScriptWriter();
code.WriteLine();
code.WriteLine("// generated");
code.Write(_scriptincludes);
code.Write(Declarations);
// consumed, more to come ...
// resize handler function (unused currently)
code.WriteLine("function docResized() ");
code.EnterBlock();
code.WriteLine("ResizeManager_Initialize();");
code.Write(_resizebuilder);
code.LeaveBlock();
// bindings initialization
code.WriteLine();
code.WriteLine("function Bindings_Initialize() ");
code.EnterBlock();
code.WriteLine("if(window['BindingObject'] !== undefined)");
code.EnterBlock();
code.Write(CodeBuilder);
code.LeaveBlock();
code.LeaveBlock();
// primary document ready handler
code.WriteLine();
code.WriteLine("docReady(function() ");
code.EnterBlock();
code.WriteLine("DataContext_Initialize(function() { Bindings_Initialize(); });");
code.WriteLine("docResized();");
code.WriteLine("DragDrop_Initialize();");
code.LeaveBlock();
code.WriteLine(");");
// TraceTarget.Trace("jscript code in HTML:\n{0}\n\n", code.Text);
writer.WriteStartElement("script");
if (!IsOptimized)
{
writer.WriteRaw(code.Text);
}
else
{
Information("generating optimized code ...");
var builder = new JScriptBuilder();
builder.SuppressedGlobalFunctions.Add("trace");
builder.RewriteProgram(code);
writer.WriteRaw(builder.Text);
}
writer.WriteEndElement();
// application specific initializer scripts ...
_scriptincludes = new JScriptBuilder();
EmitScriptIncludesAfter(writer);
if (_scriptincludes.Text.Length > 0)
{
writer.WriteStartElement("script");
writer.WriteRaw(_scriptincludes.Text);
writer.WriteEndElement();
}
}