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/
ViewModel.n
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ViewModel.n
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using Nemerle;
using Nemerle.Collections;
using Nemerle.Compiler;
using Nemerle.Compiler.Parsetree;
using Nemerle.Text;
using Nemerle.Utility;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using BF = System.Reflection.BindingFlags;
using TExpr = Nemerle.Compiler.Typedtree.TExpr;
namespace Nemerle.WUI.Reactive
{
[MacroUsage(MacroPhase.BeforeInheritance, MacroTargets.Class)]
macro ViewModel(tb : TypeBuilder)
{
ViewModelImpl.DoTransformBeforeInheritance(tb, Macros.ImplicitCTX())
}
[MacroUsage(MacroPhase.BeforeTypedMembers, MacroTargets.Class)]
macro ViewModel(tb : TypeBuilder)
{
ViewModelImpl.DoTransformBeforeTypedMembers(tb, Macros.ImplicitCTX())
}
[MacroUsage(MacroPhase.WithTypedMembers, MacroTargets.Class)]
macro ViewModel(tb : TypeBuilder)
{
ViewModelImpl.DoTransform(tb, Macros.ImplicitCTX())
}
module ViewModelImpl
{
Ident = " ";
public DoTransformBeforeInheritance(tb : TypeBuilder, typer : Typer) : void
{
//assert2(false);
Macros.DefineCTX(typer);
def vmInterface = <[ ttype: Nemerle.WUI.Reactive.IViewModel ]>;
def superTypes = tb.GetDirectSuperTypes();
unless (superTypes != null && superTypes.Exists(t => t.Equals(vmInterface)))
tb.AddImplementedInterface(<[ Nemerle.WUI.Reactive.IViewModel ]>);
}
public DoTransformBeforeTypedMembers(tb : TypeBuilder, typer : Typer) : void
{
//assert2(false);
def processMember(member : ClassMember) : void
{
| Field(ty=ty) as field =>
match (ty)
{
| _ => ()
}
| _ => ()
}
match (tb.Ast)
{
| TopDeclaration.Class(decls=decls) => foreach (d in decls) processMember(d)
| _ => ()
}
}
public DoTransform(tb : TypeBuilder, typer : Typer) : void
{
Macros.DefineCTX(typer);
def serverClass = tb.DeclaredNestedTypes.FirstOrDefault(t => t.Name == "Server");
def serverMethods = Dictionary();
when(serverClass != null)
{
def env = typer.Manager.CoreEnv;
def env = env.EnterIntoNamespace(tb.NamespaceNode);
def controllerName = tb.Name + "Controller";
def field = <[ decl: _server : $(serverClass.Name : usesite) = $(serverClass.Name : usesite)() ]>;
def ctb = env.Define(<[ decl:
public class $(controllerName : usesite) : System.Web.Mvc.Controller
{}
]>);
ctb.Define(field);
def ptb = tb.DefineNestedType(<[ decl:
class ServerProxy
{}
]>);
tb.Define(<[ decl: server : ServerProxy = ServerProxy() ]>);
foreach(member in serverClass.GetMembers()) {
| method is IMethod when !method.IsConstructor && method.DeclaringType.FullName == serverClass.FullName =>
def parameters = method.GetParameters().Map(p => <[ $(p.Name : usesite) : $(p.ty : typed) ]>);
def fparms = parameters.Map(PParameter);
def methodName = ctb.ParsedName.NewName(method.Name);
ctb.Define(<[ decl:
public $(methodName : name) (..$fparms) : System.Web.Mvc.JsonResult
{
def result = _server.$(method.Name : dyn)(..$parameters);
Json(result, System.Web.Mvc.JsonRequestBehavior.AllowGet);
}
]>);
serverMethods.Add(method.Name, fparms);
def fparms = fparms.Append([<[ parameter: callback : int -> void ]>]);
ptb.Define(<[ decl:
public $(methodName : name) (..$(fparms)) : void
{}
]>);
| _ => ()
}
ptb.Compile();
ctb.Compile();
}
def convertMethod(name : string, meth : MethodBuilder, isDependent = true) : PExpr
{
#region Type method body
def typer = typer;
def body = meth.Body;
def oldEmitDebug = typer.Manager.Options.EmitDebug;
typer.Manager.Options.EmitDebug = false;
def methodTyper = Typer(tb, null, meth, meth.Env);
methodTyper.RunFullTyping();
typer.Manager.Options.EmitDebug = oldEmitDebug;
#endregion
//assert2(false);
/*
def scriptBody =
if (isDependent)
match (scriptExprs.DivideLast())
{
| ([], last) => Ident + "return " + last.Trim()
| (exprs2, last) => $<#..$(exprs2; ";\n");\n$Ident#> + "return " + last.Trim()
}
else
$<#$Ident..$(scriptExprs; $";\n$Ident")#>;
*/
def scriptBody = match(meth.Header.Body) {
| FunBody.Typed(typedBody) =>
mutable jsAst = JsASTBuilder.Build(typedBody, false);
jsAst = JsASTOptimizer.LabelsToSwitch(jsAst);
jsAst = JsASTOptimizer.Optimize(jsAst);
jsAst = JsASTOptimizer.FlattenAndRemoveVoids(jsAst);
jsAst = JsASTOptimizer.RemoveEmptyBranches(jsAst);
JsASTWriter.Write(jsAst);
| _ => Message.Error("Couldn't type body"); "/* Error generating javascript, method body wasn't typed correctly */";
}
meth.Body = body;
def code =
if (isDependent)
$<#
this.$name = ko.computed(function() {
return $scriptBody;
}, this);#>
else
$<#
this.$name = function() {
$scriptBody;
};#>;
<[ $(code : string) ]>
}
assert2(false);
def convertMember(member : IMember) : PExpr
{
| meth is MethodBuilder when meth.Name.StartsWith("get_") || meth.Name.StartsWith("set_") => null //TODO: Add property IMethod.IsAccessor
| meth is MethodBuilder when meth.IsConstructor => null
| meth is MethodBuilder when meth.ReturnType is FixedType.Void => convertMethod(meth.Name, meth, false)
| prop is PropertyBuilder when prop.AutoPropertyField.IsSome =>
//assert2(false);
def arrayTypes = [<[ ttype: Nemerle.Core.list[_] ]>, <[ ttype: System.Collections.Generic.List[_] ]>];
def isArray = arrayTypes.Any(t => prop.Getter.ReturnType.TryUnify(t));
def ctor = if (isArray) "observableArray" else "observable";
def prefix = $<#this.$(prop.Name) = ko.$ctor(#>;
<[ $(prefix : string)
+ Nemerle.WUI.Reactive.Utils.ToJson(this.$(prop.Ast.name))
+ $(<#);#> : string) ]>
| prop is PropertyBuilder when prop.CanRead && !prop.CanWrite => convertMethod(prop.Name, prop.GetGetter() :> MethodBuilder)
| meth is MethodBuilder when meth.Header.ParametersDeclarations.Length == 0 => convertMethod(meth.Name, meth)
| _ => null
}
//assert2(false);
def members = tb.GetMembers(BF.DeclaredOnly | BF.Instance | BF.Public | BF.NonPublic);
def exprs1 = members.RevMap(convertMember).RevFilter(_ != null);
def exprs2 = exprs1.Map(e => <[ _ = sb.AppendLine($e) ]>);
_ = tb.DefineWithSource(<[ decl:
public GetViewModelScript() : string
{
def sb = System.Text.StringBuilder();
_ = sb.AppendLine("function ViewModel() { ");
{ ..$exprs2 }
_ = sb.AppendLine("}");
_ = sb.AppendLine("ko.applyBindings(new ViewModel());");
sb.ToString()
}
]>);
_ = tb.DefineWithSource(<[ decl:
public ToJson() : string
{
assert2(false);
"!!! Not implemented yet !!!"
}
]>);
_ = tb.DefineWithSource(<[ decl:
protected js(function : string) : string
{""}
]>);
}
/// Create nested type with given properties and return name of created type.
public MakeNestedViewModel(tb : TypeBuilder, typer : Typer, typeName : string, props : list[PExpr]) : PExpr
{
//assert2(false);
typer.Manager.MacroColors.PushUseSiteColor();
try
{
def makeProp(propDef : PExpr) : ClassMember
{
| <[ $(name : name) : $ty ]> => <[ decl: public $(name : name) : $ty { get; set; } ]>
| _ => Message.FatalError(propDef.Location, "Incorrect format of property defenition. Use: Name : type")
}
def name = "T" + typeName;
def props2 = props.Map(makeProp);
def nested = tb.DefineNestedType(<[ decl:
[Nemerle.Core.Record, Nemerle.WUI.Reactive.ViewModel]
public class $(name : dyn) : Nemerle.WUI.Reactive.IViewModel
{
..$props2
}
]>);
nested.Compile();
<[ ]>
}
finally { typer.Manager.MacroColors.PopColor(); }
}
}
}