public override void ConvertToJavascript(JavascriptConversionContext context)
{
var methodCall = context.Node as MethodCallExpression;
if (methodCall != null)
{
if (methodCall.Method.DeclaringType == typeof(MyCustomClass))
{
switch (methodCall.Method.Name)
{
case "GetValue":
{
context.PreventDefault();
using (context.Operation(JavascriptOperationTypes.Call))
{
using (context.Operation(JavascriptOperationTypes.IndexerProperty))
context.Write("Xpto").WriteAccessor("GetValue");
context.WriteManyIsolated('(', ')', ',', methodCall.Arguments);
}
return;
}
}
}
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
if (context.Node is MethodCallExpression methodCall)
{
if (methodCall.Method.DeclaringType == typeof(MyClassWithEnum))
{
switch (methodCall.Method.Name)
{
case "SetGender":
{
context.PreventDefault();
using (context.Operation(JavascriptOperationTypes.Call))
{
using (context.Operation(JavascriptOperationTypes.IndexerProperty))
{
context.WriteNode(methodCall.Object);
context.WriteAccessor("SetGender");
}
context.WriteManyIsolated('(', ')', ',', methodCall.Arguments);
}
return;
}
}
}
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
if (!(context.Node is InvocationExpression invocationExpression))
{
return;
}
context.PreventDefault();
context.Visitor.Visit(invocationExpression.Expression);
var writer = context.GetWriter();
using (writer.Operation(invocationExpression))
{
writer.Write("(");
for (var i = 0; i < invocationExpression.Arguments.Count; i++)
{
if (i != 0)
{
writer.Write(", ");
}
context.Visitor.Visit(invocationExpression.Arguments[i]);
}
writer.Write(")");
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
if (!(context.Node is MemberInitExpression initExpr))
{
return;
}
var typeOk1 = NewObjectTypes?.Contains(initExpr.Type) ?? false;
var typeOk2 = TypePredicate?.Invoke(initExpr.Type) ?? false;
var typeOk3 = NewObjectTypes == null && TypePredicate == null;
if (!typeOk1 && !typeOk2 && !typeOk3)
{
return;
}
if (initExpr.NewExpression.Arguments.Count > 0)
{
return;
}
if (initExpr.Bindings.Any(mb => mb.BindingType != MemberBindingType.Assignment))
{
return;
}
context.PreventDefault();
var writer = context.GetWriter();
using (writer.Operation(0))
{
writer.Write('{');
var posStart = writer.Length;
foreach (var assignExpr in initExpr.Bindings.Cast <MemberAssignment>())
{
if (writer.Length > posStart)
{
writer.Write(',');
}
var metadataProvider = context.Options.GetMetadataProvider();
var meta = metadataProvider.GetMemberMetadata(assignExpr.Member);
var memberName = meta?.MemberName;
Debug.Assert(!string.IsNullOrEmpty(memberName), "!string.IsNullOrEmpty(memberName)");
if (Regex.IsMatch(memberName, @"^\w[\d\w]*$"))
{
writer.Write(memberName);
}
else
{
writer.WriteLiteral(memberName);
}
writer.Write(':');
context.Visitor.Visit(assignExpr.Expression);
}
writer.Write('}');
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
if (context.Node is MemberExpression me && me.Member.DeclaringType == typeof(string))
{
if (me.Member.Name == nameof(String.Empty.Length))
{
context.PreventDefault();
context.Visitor.Visit(me.Expression);
context.Write(".length");
}
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
var methodCallExpression = context.Node as MethodCallExpression;
var nameAttribute = methodCallExpression?
.Method
.GetCustomAttributes <JavascriptMethodNameAttribute>()
.FirstOrDefault();
if (nameAttribute == null)
{
return;
}
context.PreventDefault();
context.Visitor.Visit(methodCallExpression.Object);
var javascriptWriter = context.GetWriter();
javascriptWriter.Write(".");
javascriptWriter.Write(nameAttribute.Name);
javascriptWriter.Write("(");
for (var i = 0; i < methodCallExpression.Arguments.Count; i++)
{
var name = "arg_" + Parameters.Count;
if (i != 0)
{
javascriptWriter.Write(", ");
}
javascriptWriter.Write(name);
Parameters[name] = methodCallExpression.Arguments[i];
}
if (nameAttribute.PositionalArguments != null)
{
for (var i = methodCallExpression.Arguments.Count;
i < nameAttribute.PositionalArguments.Length;
i++)
{
if (i != 0)
{
javascriptWriter.Write(", ");
}
context.Visitor.Visit(Expression.Constant(nameAttribute.PositionalArguments[i]));
}
}
javascriptWriter.Write(")");
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
if (!(context.Node is ConstantExpression nodeAsConst) ||
nodeAsConst.Type != typeof(bool))
{
return;
}
context.PreventDefault();
var writer = context.GetWriter();
var val = (bool)nodeAsConst.Value ? "true" : "false";
using (writer.Operation(nodeAsConst))
{
writer.Write(val);
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
var parameter = context.Node as ParameterExpression;
if (parameter == null || parameter != _parameter)
{
return;
}
context.PreventDefault();
var writer = context.GetWriter();
using (writer.Operation(parameter))
{
writer.Write(_newName);
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
var initExpr = context.Node as MemberInitExpression;
if (initExpr == null)
return;
var typeOk1 = this.NewObjectTypes?.Contains(initExpr.Type) ?? false;
var typeOk2 = this.TypePredicate?.Invoke(initExpr.Type) ?? false;
var typeOk3 = this.NewObjectTypes == null && this.TypePredicate == null;
if (!typeOk1 && !typeOk2 && !typeOk3)
return;
if (initExpr.NewExpression.Arguments.Count > 0)
return;
if (initExpr.Bindings.Any(mb => mb.BindingType != MemberBindingType.Assignment))
return;
var writer = context.GetWriter();
using (writer.Operation(0))
{
writer.Write('{');
var posStart = writer.Length;
foreach (var assignExpr in initExpr.Bindings.Cast<MemberAssignment>())
{
if (writer.Length > posStart)
writer.Write(',');
var metadataProvider = context.Options.GetMetadataProvider();
var meta = metadataProvider.GetMemberMetadata(assignExpr.Member);
var memberName = meta?.MemberName;
Debug.Assert(!string.IsNullOrEmpty(memberName), "!string.IsNullOrEmpty(memberName)");
if (Regex.IsMatch(memberName, @"^\w[\d\w]*$"))
writer.Write(memberName);
else
writer.WriteLiteral(memberName);
writer.Write(':');
context.Visitor.Visit(assignExpr.Expression);
}
writer.Write('}');
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
var methodCallExpression = context.Node as MethodCallExpression;
if (methodCallExpression?.Method.Name != "Load")
{
return;
}
if (methodCallExpression.Method.DeclaringType != typeof(RavenQuery) &&
(methodCallExpression.Object == null || methodCallExpression.Object.Type != typeof(IDocumentSession)))
{
return;
}
HasLoad = true;
Arg = methodCallExpression.Arguments[0];
IsEnumerable = Arg.Type.IsArray || LinqMethodsSupport.IsCollection(Arg.Type);
if (IsEnumerable && methodCallExpression.Object?.Type == typeof(IDocumentSession))
{
throw new NotSupportedException("Using IDocumentSession.Load(IEnumerable<string> ids) inside a query is not supported. " +
"You should use RavenQuery.Load(IEnumerable<string> ids) instead");
}
context.PreventDefault();
if (DoNotTranslate)
{
return;
}
var writer = context.GetWriter();
using (writer.Operation(methodCallExpression))
{
writer.Write("load(");
context.Visitor.Visit(Arg);
writer.Write(")");
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
if (context.Node.NodeType != ExpressionType.Coalesce || !(context.Node is BinaryExpression binaryExpression))
{
return;
}
context.PreventDefault();
var writer = context.GetWriter();
using (writer.Operation(binaryExpression))
{
context.Visitor.Visit(binaryExpression.Left);
writer.Write(" !== null && ");
context.Visitor.Visit(binaryExpression.Left);
writer.Write(" !== undefined ? ");
context.Visitor.Visit(binaryExpression.Left);
writer.Write(" : ");
context.Visitor.Visit(binaryExpression.Right);
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
var methodCallExpression = context.Node as MethodCallExpression;
var method = methodCallExpression?.Method;
if (method == null || method.DeclaringType != typeof(Math))
{
return;
}
if (SupportedNames.ContainsKey(method.Name) == false)
{
throw new NotSupportedException($"Translation of System.Math.{method.Name} to JavaScript is not supported");
}
var writer = context.GetWriter();
context.PreventDefault();
using (writer.Operation(methodCallExpression))
{
writer.Write("Math.");
writer.Write(SupportedNames[method.Name]);
writer.Write("(");
for (var i = 0; i < methodCallExpression.Arguments.Count; i++)
{
if (i != 0)
{
writer.Write(", ");
}
context.Visitor.Visit(methodCallExpression.Arguments[i]);
}
writer.Write(")");
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
var cond = context.Node as ConditionalExpression;
if (cond?.IfTrue is ConditionalExpression || cond?.IfFalse is ConditionalExpression == false)
{
return;
}
var writer = context.GetWriter();
context.PreventDefault();
using (writer.Operation(cond))
{
context.Visitor.Visit(cond.Test);
writer.Write(" ? ");
context.Visitor.Visit(cond.IfTrue);
writer.Write(" : ");
context.Visitor.Visit(cond.IfFalse);
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
if (!(context.Node is MemberExpression member))
{
return;
}
if (member.Expression is MemberExpression innerMember &&
innerMember.Member.Name.StartsWith("<>h__TransparentIdentifier"))
{
context.PreventDefault();
var writer = context.GetWriter();
using (writer.Operation(innerMember))
{
writer.Write($"{member.Member.Name}");
}
}
if (member.Expression is ParameterExpression parameter && parameter.Name.StartsWith("<>h__TransparentIdentifier"))
{
context.PreventDefault();
if (member.Member.Name.StartsWith("<>h__TransparentIdentifier"))
{
return;
}
var writer = context.GetWriter();
using (writer.Operation(parameter))
{
writer.Write($"{member.Member.Name}");
}
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
if (context.Node is MethodCallExpression methodCall)
{
if (methodCall.Method.DeclaringType == typeof(Math))
{
if (membersMap.TryGetValue(methodCall.Method.Name, out var jsInfo))
{
if (methodCall.Arguments.Count == jsInfo.length)
{
context.PreventDefault();
using (context.Operation(JavascriptOperationTypes.Call))
{
using (context.Operation(JavascriptOperationTypes.IndexerProperty))
context.Write("Math." + jsInfo.name);
context.WriteManyIsolated('(', ')', ',', methodCall.Arguments);
}
return;
}
else if (methodCall.Method.Name == "Log" &&
methodCall.Arguments.Count == 2)
{
// JavaScript does not support `Math.log` with 2 parameters,
// But it is easy enough for us to give a little help!
context.PreventDefault();
using (context.Operation(JavascriptOperationTypes.MulDivMod))
{
using (context.Operation(JavascriptOperationTypes.Call))
{
using (context.Operation(JavascriptOperationTypes.IndexerProperty))
context.Write("Math.log");
context.Write('(');
using (context.Operation(0))
context.Write(methodCall.Arguments[0]);
context.Write(')');
}
context.Write('/');
using (context.Operation(JavascriptOperationTypes.Call))
{
using (context.Operation(JavascriptOperationTypes.IndexerProperty))
context.Write("Math.log");
context.Write('(');
using (context.Operation(0))
context.Write(methodCall.Arguments[1]);
context.Write(')');
}
}
return;
}
else if (methodCall.Method.Name == "Round" &&
methodCall.Arguments.Count == 2 &&
TypeHelpers.IsNumericType(methodCall.Arguments[1].Type))
{
// We won't support `Math.Round` with two parameters by default.
// To do it, we'd have to repeat an input value in the expression (unacceptable):
// Math.Round(A, B) => Math.round(A * Math.pow(10, B)) / Math.pow(10, B)
// Or start helping with hacky things (acceptable, but not by default):
// Math.Round(A, B) => (function(a, b) { return Math.round(a * b) / b; })(A, Math.pow(10, B));
if (round2)
{
context.PreventDefault();
using (context.Operation(JavascriptOperationTypes.Call))
{
context.WriteLambda <Func <double, double, double> >((a, b) => Math.Round(a * b) / b);
context.Write('(');
using (context.Operation(0))
context.Write(methodCall.Arguments[0]);
context.Write(',');
using (context.Operation(0))
using (context.Operation(JavascriptOperationTypes.Call))
{
using (context.Operation(JavascriptOperationTypes.IndexerProperty))
context.Write("Math.pow");
context.Write('(');
context.Write("10");
context.Write(',');
using (context.Operation(0))
context.Write(methodCall.Arguments[1]);
context.Write(')');
}
context.Write(')');
return;
}
}
}
}
}
}
// E and PI are constant values, they will never result in
// a member access expression. We will have to catch the
// exact numbers, and convert them instead.
if (context.Node is ConstantExpression constVal)
{
if (constVal.Value.Equals(Math.E))
{
context.PreventDefault();
using (context.Operation(JavascriptOperationTypes.IndexerProperty))
context.Write("Math.E");
}
else if (constVal.Value.Equals(Math.PI))
{
context.PreventDefault();
using (context.Operation(JavascriptOperationTypes.IndexerProperty))
context.Write("Math.PI");
}
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
if (!(context.Node is ConstantExpression nodeAsConst))
{
return;
}
var writer = context.GetWriter();
using (writer.Operation(nodeAsConst))
{
if (nodeAsConst.Value == null)
{
context.PreventDefault();
writer.Write("null");
return;
}
if (nodeAsConst.Type == typeof(bool))
{
context.PreventDefault();
var val = (bool)nodeAsConst.Value ? "true" : "false";
using (writer.Operation(nodeAsConst))
{
writer.Write(val);
}
return;
}
if (nodeAsConst.Type == typeof(char))
{
context.PreventDefault();
writer.Write("\"");
writer.Write(nodeAsConst.Value);
writer.Write("\"");
return;
}
if (nodeAsConst.Type.IsArray || LinqMethodsSupport.IsCollection(nodeAsConst.Type))
{
var arr = nodeAsConst.Value as object[] ?? (nodeAsConst.Value as IEnumerable <object>)?.ToArray();
if (arr == null)
{
return;
}
context.PreventDefault();
writer.Write("[");
for (var i = 0; i < arr.Length; i++)
{
if (i != 0)
{
writer.Write(", ");
}
if (arr[i] is string || arr[i] is char)
{
writer.Write("\"");
writer.Write(arr[i]);
writer.Write("\"");
}
else
{
writer.Write(arr[i]);
}
}
writer.Write("]");
}
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
var newExp = context.Node as NewExpression;
if (newExp != null && newExp.Type == typeof(DateTime))
{
context.PreventDefault();
var writer = context.GetWriter();
using (writer.Operation(newExp))
{
writer.Write("new Date(");
for (int i = 0; i < newExp.Arguments.Count; i++)
{
var value = ((ConstantExpression)newExp.Arguments[i]).Value;
if (i == 1)
{
var month = (int)value;
writer.Write(month - 1);
}
else
{
writer.Write(value);
}
if (i < newExp.Arguments.Count - 1)
{
writer.Write(", ");
}
}
writer.Write(")");
}
return;
}
var node = context.Node as MemberExpression;
if (node == null)
{
return;
}
if (node.Type == typeof(DateTime))
{
var writer = context.GetWriter();
context.PreventDefault();
using (writer.Operation(node))
{
//match DateTime expressions like user.DateOfBirth, order.ShipmentInfo.DeliveryDate, etc
if (node.Expression != null)
{
writer.Write("new Date(Date.parse(");
context.Visitor.Visit(node.Expression); //visit inner expression (user ,order.ShipmentInfo, etc)
writer.Write($".{node.Member.Name}))");
return;
}
//match DateTime.Now , DateTime.UtcNow, DateTime.Today
switch (node.Member.Name)
{
case "Now":
writer.Write("Date.now()");
break;
case "UtcNow":
writer.Write(
@"(function (date) { return new Date(date.getUTCFullYear(), date.getUTCMonth(), date.getUTCDate(), date.getUTCHours(), date.getUTCMinutes(), date.getUTCSeconds(), date.getUTCMilliseconds());})(new Date()).getTime()");
break;
case "Today":
writer.Write("new Date().setHours(0,0,0,0)");
break;
}
}
return;
}
if (node.Expression.Type == typeof(DateTime) && node.Expression is MemberExpression memberExpression)
{
var writer = context.GetWriter();
context.PreventDefault();
using (writer.Operation(node))
{
//match expressions like : DateTime.Today.Year , DateTime.Now.Day , user.Birthday.Month , etc
writer.Write("new Date(");
if (memberExpression.Member.DeclaringType != typeof(DateTime))
{
writer.Write("Date.parse(");
context.Visitor.Visit(memberExpression.Expression);
writer.Write($".{memberExpression.Member.Name}");
writer.Write(")");
}
writer.Write(")");
switch (node.Member.Name)
{
case "Year":
writer.Write(memberExpression.Member.Name == "UtcNow" ? ".getUTCFullYear()" : ".getFullYear()");
break;
case "Month":
writer.Write(memberExpression.Member.Name == "UtcNow" ? ".getUTCMonth()+1" : ".getMonth()+1");
break;
case "Day":
writer.Write(memberExpression.Member.Name == "UtcNow" ? ".getUTCDate()" : ".getDate()");
break;
case "Hour":
writer.Write(memberExpression.Member.Name == "UtcNow" ? ".getUTCHours()" : ".getHours()");
break;
case "Minute":
writer.Write(memberExpression.Member.Name == "UtcNow" ? ".getUTCMinutes()" : ".getMinutes()");
break;
case "Second":
writer.Write(memberExpression.Member.Name == "UtcNow" ? ".getUTCSeconds()" : ".getSeconds()");
break;
case "Millisecond":
writer.Write(memberExpression.Member.Name == "UtcNow" ? ".getUTCMilliseconds()" : ".getMilliseconds()");
break;
case "Ticks":
writer.Write(".getTime()*10000");
break;
}
}
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
if (context.Node is LambdaExpression lambdaExpression &&
lambdaExpression.Parameters.Count > 0 &&
lambdaExpression.Parameters[0].Name.StartsWith("<>h__TransparentIdentifier"))
{
DoNotIgnore = true;
context.PreventDefault();
var writer = context.GetWriter();
using (writer.Operation(lambdaExpression))
{
writer.Write("function(");
writer.Write(lambdaExpression.Parameters[0].Name.Substring(2));
writer.Write("){return ");
context.Visitor.Visit(lambdaExpression.Body);
writer.Write(";}");
}
return;
}
if (!(context.Node is MemberExpression member))
{
return;
}
if (member.Expression is MemberExpression innerMember &&
innerMember.Member.Name.StartsWith("<>h__TransparentIdentifier"))
{
context.PreventDefault();
var writer = context.GetWriter();
using (writer.Operation(innerMember))
{
if (DoNotIgnore)
{
context.Visitor.Visit(member.Expression);
}
writer.Write($"{member.Member.Name}");
}
}
if (member.Expression is ParameterExpression parameter && parameter.Name.StartsWith("<>h__TransparentIdentifier"))
{
context.PreventDefault();
var writer = context.GetWriter();
using (writer.Operation(parameter))
{
if (DoNotIgnore)
{
writer.Write(parameter.Name.Substring(2));
writer.Write(".");
}
writer.Write($"{member.Member.Name}");
}
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
var methodCallExpression = context.Node as MethodCallExpression;
var methodName = methodCallExpression?
.Method.Name;
if (methodName == null)
{
return;
}
string newName;
switch (methodName)
{
case "Any":
newName = "some";
break;
case "All":
newName = "every";
break;
case "Select":
newName = "map";
break;
case "Where":
newName = "filter";
break;
case "Contains":
newName = "indexOf";
break;
default:
return;
}
var javascriptWriter = context.GetWriter();
var obj = methodCallExpression.Arguments[0] as MemberExpression;
if (obj == null)
{
if (methodCallExpression.Arguments[0] is MethodCallExpression innerMethodCall)
{
context.PreventDefault();
context.Visitor.Visit(innerMethodCall);
javascriptWriter.Write($".{newName}");
}
else
{
return;
}
}
else
{
context.PreventDefault();
javascriptWriter.Write($"this.{obj.Member.Name}.{newName}");
}
if (methodCallExpression.Arguments.Count < 2)
{
return;
}
javascriptWriter.Write("(");
context.Visitor.Visit(methodCallExpression.Arguments[1]);
javascriptWriter.Write(")");
if (newName == "indexOf")
{
javascriptWriter.Write(">=0");
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
var nodeAsConst = context.Node as ConstantExpression;
if (nodeAsConst != null && nodeAsConst.Type == typeof(bool))
{
context.PreventDefault();
var writer = context.GetWriter();
var val = nodeAsConst.Value.ToString().ToLower();
using (writer.Operation(nodeAsConst))
{
writer.Write(val);
}
return;
}
var newExp = context.Node as NewExpression;
if (newExp != null && newExp.Type == typeof(DateTime))
{
context.PreventDefault();
var writer = context.GetWriter();
using (writer.Operation(newExp))
{
writer.Write("new Date(");
for (int i = 0; i < newExp.Arguments.Count; i++)
{
var value = ((ConstantExpression)newExp.Arguments[i]).Value;
if (i == 1)
{
var month = (int)value;
writer.Write(month - 1);
}
else
{
writer.Write(value);
}
if (i < newExp.Arguments.Count - 1)
{
writer.Write(", ");
}
}
writer.Write(")");
}
return;
}
var node = context.Node as MemberExpression;
if (node == null)
{
return;
}
context.PreventDefault();
var javascriptWriter = context.GetWriter();
using (javascriptWriter.Operation(node))
{
if (node.Type == typeof(DateTime))
{
//match DateTime expressions like call.Started, user.DateOfBirth, etc
if (node.Expression == Parameter)
{
//translate it to Date.parse(this.Started)
javascriptWriter.Write($"Date.parse(this.{node.Member.Name})");
return;
}
//match expression where DateTime object is nested, like order.ShipmentInfo.DeliveryDate
if (node.Expression != null)
{
javascriptWriter.Write("Date.parse(");
context.Visitor.Visit(node.Expression); //visit inner expression (i.e order.ShipmentInfo)
javascriptWriter.Write($".{node.Member.Name})");
return;
}
//match DateTime.Now , DateTime.UtcNow, DateTime.Today
switch (node.Member.Name)
{
case "Now":
javascriptWriter.Write("Date.now()");
break;
case "UtcNow":
javascriptWriter.Write(@"(function (date) { return new Date(date.getUTCFullYear(), date.getUTCMonth(), date.getUTCDate(), date.getUTCHours(), date.getUTCMinutes(), date.getUTCSeconds(), date.getUTCMilliseconds());})(new Date()).getTime()");
break;
case "Today":
javascriptWriter.Write("new Date().setHours(0,0,0,0)");
break;
}
return;
}
if (node.Expression == Parameter)
{
javascriptWriter.Write($"this.{node.Member.Name}");
return;
}
switch (node.Expression)
{
case null:
return;
case MemberExpression member:
context.Visitor.Visit(member);
break;
default:
context.Visitor.Visit(node.Expression);
break;
}
javascriptWriter.Write(".");
if (node.Member.Name == "Count" && IsCollection(node.Member.DeclaringType))
{
javascriptWriter.Write("length");
}
else
{
javascriptWriter.Write(node.Member.Name);
}
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
var node = context.Node as MemberExpression;
if (node != null && node.Member.Name == "Count" && IsCollection(node.Member.DeclaringType))
{
var writer = context.GetWriter();
context.PreventDefault();
context.Visitor.Visit(node.Expression);
using (writer.Operation(node))
{
writer.Write(".");
writer.Write("length");
}
return;
}
var methodCallExpression = context.Node as MethodCallExpression;
var methodName = methodCallExpression?
.Method.Name;
if (methodName == null || IsCollection(methodCallExpression.Method.DeclaringType) == false)
{
return;
}
string newName;
switch (methodName)
{
case "Any":
newName = "some";
break;
case "All":
newName = "every";
break;
case "Select":
newName = "map";
break;
case "Where":
newName = "filter";
break;
case "Contains":
newName = "indexOf";
break;
case "ToList":
case "ToArray":
context.PreventDefault();
context.Visitor.Visit(methodCallExpression.Arguments[0]);
return;
case "FirstOrDefault":
case "First":
context.PreventDefault();
context.Visitor.Visit(methodCallExpression.Arguments[0]);
var writer = context.GetWriter();
using (writer.Operation(methodCallExpression))
{
if (methodCallExpression.Arguments.Count > 1)
{
writer.Write(".find");
context.Visitor.Visit(methodCallExpression.Arguments[1]);
}
}
return;
default:
return;
}
var javascriptWriter = context.GetWriter();
if (methodCallExpression.Object != null)
{
context.PreventDefault();
context.Visitor.Visit(methodCallExpression.Object);
javascriptWriter.Write($".{newName}");
javascriptWriter.Write("(");
context.Visitor.Visit(methodCallExpression.Arguments[0]);
javascriptWriter.Write(")");
}
else
{
context.PreventDefault();
context.Visitor.Visit(methodCallExpression.Arguments[0]);
javascriptWriter.Write($".{newName}");
if (methodCallExpression.Arguments.Count < 2)
{
return;
}
javascriptWriter.Write("(");
context.Visitor.Visit(methodCallExpression.Arguments[1]);
javascriptWriter.Write(")");
}
if (newName == "indexOf")
{
javascriptWriter.Write(">=0");
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
if (context.Node is ConstantExpression cte && cte.Type.IsEnum)
{
context.PreventDefault();
var writer = context.GetWriter();
var remaining = Convert.ToInt64(cte.Value);
var flagsAsString = (opts & EnumOptions.FlagsAsStringWithSeparator) != 0;
var flagsAsOrs = (opts & EnumOptions.FlagsAsNumericOrs) != 0;
var flagsAsArray = (opts & EnumOptions.FlagsAsArray) != 0;
var isFlags = cte.Type.IsDefined(typeof(FlagsAttribute), false);
// when value is zero
if (remaining == 0 && (!isFlags || !(flagsAsString || flagsAsOrs || flagsAsArray)))
{
if (WriteSingleEnumItem(context, writer, 0, cte.Value, false))
{
return;
}
}
// reading enum composition
var values = Enum.GetValues(cte.Type);
var selected = new List <int>();
for (var itV = 0; itV < values.Length; itV++)
{
var val = Convert.ToInt64(values.GetValue(values.Length - itV - 1));
if ((val & remaining) == val)
{
remaining &= ~val;
selected.Add(values.Length - itV - 1);
if (!isFlags)
{
break;
}
}
}
// selecting enum case
if (isFlags)
{
var cnt = selected.Count + (remaining != 0 ? 1 : 0);
PrecedenceController xpto = null;
var start = "";
var separator = "";
var end = "";
if (flagsAsString)
{
xpto = writer.Operation(JavascriptOperationTypes.Literal);
start = "\"";
separator = "|";
end = "\"";
}
else if (flagsAsArray)
{
xpto = writer.Operation(0);
start = "[";
separator = ",";
end = "]";
}
else if (flagsAsOrs && cnt > 1)
{
xpto = writer.Operation(JavascriptOperationTypes.Or);
start = "";
separator = "|";
end = "";
}
else if (cnt > 1)
{
throw new NotSupportedException("When converting flags enums to JavaScript, a flags option must be specified.");
}
using (xpto)
{
writer.Write(start);
var pos0 = writer.Length;
for (var itIdx = 0; itIdx < selected.Count; itIdx++)
{
if (pos0 != writer.Length)
{
writer.Write(separator);
}
var index = selected[itIdx];
var enumVal = values.GetValue(index);
var val = Convert.ToInt64(enumVal);
WriteSingleEnumItem(context, writer, val, enumVal, flagsAsString);
}
if (remaining != 0)
{
if (pos0 != writer.Length)
{
writer.Write(separator);
}
WriteSingleEnumItem(context, writer, remaining, remaining, flagsAsString);
}
writer.Write(end);
}
}
else
{
if (remaining != 0)
{
var enumVal = cte.Value;
var val = Convert.ToInt64(cte.Value);
WriteSingleEnumItem(context, writer, val, enumVal, false);
}
else
{
foreach (var index in selected)
{
var enumVal = values.GetValue(index);
var val = Convert.ToInt64(enumVal);
WriteSingleEnumItem(context, writer, val, enumVal, false);
}
}
}
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
if (context.Node is MethodCallExpression methodCall)
{
if (methodCall.Method.DeclaringType == typeof(string))
{
switch (methodCall.Method.Name)
{
// TODO: to support VB string concat operator `&` we must do this by default... so this code is not necessary
// TODO: decide whether this will be the default or not
//case "Concat":
// {
// context.PreventDefault();
// var writer = context.GetWriter();
// using (writer.Operation(JavascriptOperationTypes.Concat))
// {
// if (methodCall.Arguments.Count == 0)
// writer.Write("''");
// else
// {
// if (GetTypeOfExpression(methodCall.Arguments[0]) != typeof(string))
// writer.Write("''+");
// context.WriteMany('+', methodCall.Arguments);
// }
// }
// return;
// }
case "Join":
{
context.PreventDefault();
var writer = context.GetWriter();
using (writer.Operation(JavascriptOperationTypes.Call))
{
using (writer.Operation(JavascriptOperationTypes.IndexerProperty))
{
var pars = methodCall.Method.GetParameters();
if (pars.Length == 4 && pars[1].ParameterType.IsArray && pars[2].ParameterType == typeof(int) && pars[3].ParameterType == typeof(int))
{
throw new NotSupportedException("The `String.Join` method with start and count paramaters is not supported.");
}
if (pars.Length != 2 || !TypeHelpers.IsEnumerableType(pars[1].ParameterType))
{
throw new NotSupportedException("This `String.Join` method is not supported.");
}
// if second parameter is an enumerable, render it directly
context.Visitor.Visit(methodCall.Arguments[1]);
writer.Write(".join");
}
writer.Write('(');
// separator
using (writer.Operation(0))
context.Visitor.Visit(methodCall.Arguments[0]);
writer.Write(')');
}
return;
}
}
}
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
var methodCall = context.Node as MethodCallExpression;
if (methodCall != null)
if (methodCall.Method.DeclaringType == typeof(MyCustomClass))
{
switch (methodCall.Method.Name)
{
case "GetValue":
{
using (context.Operation(JavascriptOperationTypes.Call))
{
using (context.Operation(JavascriptOperationTypes.IndexerProperty))
context.Write("Xpto").WriteAccessor("GetValue");
context.WriteManyIsolated('(', ')', ',', methodCall.Arguments);
}
return;
}
}
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
var methodCall = context.Node as MethodCallExpression;
if (methodCall != null)
if (methodCall.Method.DeclaringType == typeof(Enumerable))
{
switch (methodCall.Method.Name)
{
case "Select":
{
var writer = context.GetWriter();
using (writer.Operation(JavascriptOperationTypes.Call))
{
using (writer.Operation(JavascriptOperationTypes.IndexerProperty))
{
// public static IEnumerable<TResult> Select<TSource, TResult>(this IEnumerable<TSource> source, Func<TSource, TResult> selector)
// public static IEnumerable<TResult> Select<TSource, TResult>(this IEnumerable<TSource> source, Func<TSource, int, TResult> selector)
var pars = methodCall.Method.GetParameters();
if (pars.Length != 2)
throw new NotSupportedException("The `Enumerable.Select` method must have 2 parameters.");
context.Visitor.Visit(methodCall.Arguments[0]);
writer.Write(".map");
}
writer.Write('(');
// separator
using (writer.Operation(0))
context.Visitor.Visit(methodCall.Arguments[1]);
writer.Write(')');
}
return;
}
case "Where":
{
var writer = context.GetWriter();
using (writer.Operation(JavascriptOperationTypes.Call))
{
using (writer.Operation(JavascriptOperationTypes.IndexerProperty))
{
// public static IEnumerable<TSource> Where<TSource>(this IEnumerable<TSource> source, Func<TSource, bool> predicate)
// public static IEnumerable<TSource> Where<TSource>(this IEnumerable<TSource> source, Func<TSource, int, bool> predicate)
var pars = methodCall.Method.GetParameters();
if (pars.Length != 2)
throw new NotSupportedException("The `Enumerable.Where` method must have 2 parameters.");
context.Visitor.Visit(methodCall.Arguments[0]);
writer.Write(".filter");
}
writer.Write('(');
// separator
using (writer.Operation(0))
context.Visitor.Visit(methodCall.Arguments[1]);
writer.Write(')');
}
return;
}
case "ToArray":
{
// Ecma Script 6+: use spread operator
// Other: use array `slice`
if (context.Options.ScriptVersion.Supports(JavascriptSyntax.ArraySpread))
{
var writer = context.GetWriter();
using (writer.Operation(0))
{
writer.Write('[');
writer.Write("...");
using (writer.Operation(JavascriptOperationTypes.ParamIsolatedLhs))
context.Visitor.Visit(methodCall.Arguments[0]);
writer.Write(']');
}
}
else
{
var writer = context.GetWriter();
using (writer.Operation(JavascriptOperationTypes.Call))
{
using (writer.Operation(JavascriptOperationTypes.IndexerProperty))
{
context.Visitor.Visit(methodCall.Arguments[0]);
writer.Write(".slice");
}
writer.Write('(');
writer.Write(')');
}
}
return;
}
}
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
if (!(context.Node is MethodCallExpression mce) || mce.Method.DeclaringType != typeof(string))
{
return;
}
string newName;
switch (mce.Method.Name)
{
case "PadLeft":
newName = "padStart";
break;
case "PadRight":
newName = "padEnd";
break;
case "Substring":
newName = "substr";
break;
case "StartsWith":
newName = "startsWith";
break;
case "EndsWith":
newName = "endsWith";
break;
case "Join":
newName = "join";
break;
default:
return;
}
var writer = context.GetWriter();
context.PreventDefault();
using (writer.Operation(mce))
{
if (newName == "join")
{
if (mce.Arguments.Count > 2)
{
writer.Write("[");
for (int i = 1; i < mce.Arguments.Count; i++)
{
if (i != 1)
{
writer.Write(", ");
}
context.Visitor.Visit(mce.Arguments[i]);
}
writer.Write("]");
}
else
{
context.Visitor.Visit(mce.Arguments[1]);
}
}
else
{
context.Visitor.Visit(mce.Object);
}
writer.Write($".{newName}(");
context.Visitor.Visit(mce.Arguments[0]);
if (mce.Arguments.Count > 1 && newName != "join")
{
writer.Write(", ");
context.Visitor.Visit(mce.Arguments[1]);
}
writer.Write(")");
}
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
var methodCallExpression = context.Node as MethodCallExpression;
var nameAttribute = methodCallExpression?
.Method
.GetCustomAttributes(typeof(JavascriptMethodNameAttribute), false)
.OfType <JavascriptMethodNameAttribute>()
.FirstOrDefault();
if (nameAttribute == null)
{
return;
}
context.PreventDefault();
var javascriptWriter = context.GetWriter();
javascriptWriter.Write(".");
javascriptWriter.Write(nameAttribute.Name);
javascriptWriter.Write("(");
var args = new List <Expression>();
foreach (var expr in methodCallExpression.Arguments)
{
var expression = expr as NewArrayExpression;
if (expression != null)
{
args.AddRange(expression.Expressions);
}
else
{
args.Add(expr);
}
}
for (var i = 0; i < args.Count; i++)
{
var name = $"arg_{Parameters.Count}_{Suffix}";
if (i != 0)
{
javascriptWriter.Write(", ");
}
javascriptWriter.Write("args.");
javascriptWriter.Write(name);
object val;
if (LinqPathProvider.GetValueFromExpressionWithoutConversion(args[i], out val))
{
Parameters[name] = val;
}
}
if (nameAttribute.PositionalArguments != null)
{
for (int i = args.Count;
i < nameAttribute.PositionalArguments.Length;
i++)
{
if (i != 0)
{
javascriptWriter.Write(", ");
}
context.Visitor.Visit(Expression.Constant(nameAttribute.PositionalArguments[i]));
}
}
javascriptWriter.Write(")");
}
private bool WriteSingleEnumItem(
JavascriptConversionContext context,
JavascriptWriter writer,
long numValue,
object enumValue,
bool inStringAlready)
{
if ((opts & EnumOptions.UseStrings) != 0)
{
if (inStringAlready)
{
if ((opts & EnumOptions.UseNumbers) != 0)
{
writer.WriteLiteralStringContent(numValue.ToString());
}
else
{
var str = enumValue.ToString();
if (numValue == 0 && str == "0")
{
writer.WriteLiteralStringContent("");
}
else
{
writer.WriteLiteralStringContent(str);
}
}
return(true);
}
using (writer.Operation(JavascriptOperationTypes.Literal))
{
if ((opts & EnumOptions.UseNumbers) != 0)
{
writer.WriteLiteral(numValue.ToString());
}
else
{
var str = enumValue.ToString();
if (numValue == 0 && str == "0")
{
writer.WriteLiteral("");
}
else
{
writer.WriteLiteral(str);
}
}
return(true);
}
}
if ((opts & EnumOptions.UseNumbers) != 0)
{
using (writer.Operation(JavascriptOperationTypes.Literal))
writer.WriteLiteral(numValue);
return(true);
}
if ((opts & EnumOptions.UseStaticFields) != 0)
{
using (writer.Operation(JavascriptOperationTypes.IndexerProperty))
context.Write(enumValue.GetType().Name).WriteAccessor(enumValue.ToString());
return(true);
}
return(false);
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
if (context.Node is MethodCallExpression methodCall)
{
if (methodCall.Method.DeclaringType == typeof(Enumerable))
{
switch (methodCall.Method.Name)
{
case "Select":
{
context.PreventDefault();
var writer = context.GetWriter();
using (writer.Operation(JavascriptOperationTypes.Call))
{
using (writer.Operation(JavascriptOperationTypes.IndexerProperty))
{
// public static IEnumerable<TResult> Select<TSource, TResult>(this IEnumerable<TSource> source, Func<TSource, TResult> selector)
// public static IEnumerable<TResult> Select<TSource, TResult>(this IEnumerable<TSource> source, Func<TSource, int, TResult> selector)
var pars = methodCall.Method.GetParameters();
if (pars.Length != 2)
{
throw new NotSupportedException("The `Enumerable.Select` method must have 2 parameters.");
}
context.Visitor.Visit(methodCall.Arguments[0]);
writer.Write(".map");
}
writer.Write('(');
// separator
using (writer.Operation(0))
context.Visitor.Visit(methodCall.Arguments[1]);
writer.Write(')');
}
return;
}
case "Where":
{
context.PreventDefault();
var writer = context.GetWriter();
using (writer.Operation(JavascriptOperationTypes.Call))
{
using (writer.Operation(JavascriptOperationTypes.IndexerProperty))
{
// public static IEnumerable<TSource> Where<TSource>(this IEnumerable<TSource> source, Func<TSource, bool> predicate)
// public static IEnumerable<TSource> Where<TSource>(this IEnumerable<TSource> source, Func<TSource, int, bool> predicate)
var pars = methodCall.Method.GetParameters();
if (pars.Length != 2)
{
throw new NotSupportedException("The `Enumerable.Where` method must have 2 parameters.");
}
context.Visitor.Visit(methodCall.Arguments[0]);
writer.Write(".filter");
}
writer.Write('(');
// separator
using (writer.Operation(0))
context.Visitor.Visit(methodCall.Arguments[1]);
writer.Write(')');
}
return;
}
case "ToArray":
{
// Ecma Script 6+: use spread operator
// Other: use array `slice`
if (context.Options.ScriptVersion.Supports(JavascriptSyntaxFeature.ArraySpread))
{
context.PreventDefault();
var writer = context.GetWriter();
using (writer.Operation(0))
{
writer.Write('[');
writer.Write("...");
using (writer.Operation(JavascriptOperationTypes.ParamIsolatedLhs))
context.Visitor.Visit(methodCall.Arguments[0]);
writer.Write(']');
}
}
else
{
context.PreventDefault();
var writer = context.GetWriter();
using (writer.Operation(JavascriptOperationTypes.Call))
{
using (writer.Operation(JavascriptOperationTypes.IndexerProperty))
{
context.Visitor.Visit(methodCall.Arguments[0]);
writer.Write(".slice");
}
writer.Write('(');
writer.Write(')');
}
}
return;
}
}
}
}
}
