private ParametrizedCode FormatJavascript(JsExpression node, bool allowObservableResult = true)
{
var expr = new JsParenthesizedExpression(node.Clone());
expr.AcceptVisitor(new KnockoutObservableHandlingVisitor(allowObservableResult));
JavascriptNullCheckAdder.AddNullChecks(expr);
expr = new JsParenthesizedExpression((JsExpression)JsTemporaryVariableResolver.ResolveVariables(expr.Expression.Detach()));
return((StartsWithStatementLikeExpression(expr.Expression) ? expr : expr.Expression).FormatParametrizedScript(niceMode: configuration.Debug));
}
public void JsNullCheck_SimpleObjectInvocation()
{
var expr =
new JsIdentifierExpression("a").WithAnnotation(MayBeNullAnnotation.Instance).WithAnnotation(new ViewModelInfoAnnotation(typeof(JsNullChecksTests)))
.Invoke(new JsIdentifierExpression("G")).WithAnnotation(MayBeNullAnnotation.Instance).WithAnnotation(new ViewModelInfoAnnotation(typeof(JsNullChecksTests)))
.Invoke();
expr = JavascriptNullCheckAdder.AddNullChecks(expr);
var node = JsTemporaryVariableResolver.ResolveVariables(expr);
Assert.AreEqual("(a&&a(G)||eval)()", node.FormatScript(), node.FormatScript(niceMode: true));
}
public void JsNullCheck_SimpleObjectMemeberAccess3()
{
var expr =
new JsIdentifierExpression("a").WithAnnotation(MayBeNullAnnotation.Instance).WithAnnotation(new ViewModelInfoAnnotation(typeof(JsNullChecksTests)))
.Member("b").Invoke().WithAnnotation(MayBeNullAnnotation.Instance).WithAnnotation(new ViewModelInfoAnnotation(typeof(JsNullChecksTests)))
.Member("c").Invoke();
expr = JavascriptNullCheckAdder.AddNullChecks(expr);
var node = JsTemporaryVariableResolver.ResolveVariables(expr);
Assert.AreEqual("function(b){return (b=a&&a.b())&&b.c();}()", node.FormatScript(), node.FormatScript(niceMode: true));
}
public void JsNullCheck_SimpleMemeberAccess2()
{
var expr =
new JsIdentifierExpression("a").WithAnnotation(MayBeNullAnnotation.Instance)
.Member("b").WithAnnotation(MayBeNullAnnotation.Instance)
.Member("c");
expr = JavascriptNullCheckAdder.AddNullChecks(expr);
var node = JsTemporaryVariableResolver.ResolveVariables(expr);
Assert.AreEqual("function(b){return (b=a==null?null:a.b)==null?null:b.c;}()", node.FormatScript(), node.FormatScript(niceMode: true));
}
public string CompileBinding(Func<Dictionary<string, Expression>, Expression> expr, Type[] contexts)
{
var context = DataContextStack.Create(contexts.FirstOrDefault() ?? typeof(object), extensionParameters: new BindingExtensionParameter[]{
new BindingPageInfoExtensionParameter()
});
for (int i = 1; i < contexts.Length; i++)
{
context = DataContextStack.Create(contexts[i], context);
}
var expressionTree = expr(BindingExpressionBuilder.GetParameters(context).ToDictionary(e => e.Name, e => (Expression)e));
var configuration = DotvvmTestHelper.CreateConfiguration();
var jsExpression = new JsParenthesizedExpression(configuration.ServiceProvider.GetRequiredService<JavascriptTranslator>().CompileToJavascript(expressionTree, context));
jsExpression.AcceptVisitor(new KnockoutObservableHandlingVisitor(true));
JsTemporaryVariableResolver.ResolveVariables(jsExpression);
return JavascriptTranslator.FormatKnockoutScript(jsExpression.Expression);
}
public string CompileBinding(string expression, Type[] contexts, Type expectedType)
{
var context = DataContextStack.Create(contexts.FirstOrDefault() ?? typeof(object), extensionParameters: new BindingExtensionParameter[] {
new BindingPageInfoExtensionParameter(),
}.Concat(configuration.Markup.DefaultExtensionParameters).ToArray());
for (int i = 1; i < contexts.Length; i++)
{
context = DataContextStack.Create(contexts[i], context);
}
var parser = new BindingExpressionBuilder();
var expressionTree = TypeConversion.ImplicitConversion(parser.Parse(expression, context, BindingParserOptions.Create <ValueBindingExpression>()), expectedType, true, true);
var jsExpression = new JsParenthesizedExpression(configuration.ServiceProvider.GetRequiredService <JavascriptTranslator>().CompileToJavascript(expressionTree, context));
jsExpression.AcceptVisitor(new KnockoutObservableHandlingVisitor(true));
JsTemporaryVariableResolver.ResolveVariables(jsExpression);
return(JavascriptTranslator.FormatKnockoutScript(jsExpression.Expression));
}
public void NestedConditionals()
{
JsExpression expr =
new JsMemberAccessExpression(
new JsConditionalExpression(
new JsIdentifierExpression("c"),
new JsIdentifierExpression("a"),
new JsConditionalExpression(
new JsIdentifierExpression("c2"),
new JsIdentifierExpression("a2").WithAnnotation(MayBeNullAnnotation.Instance),
new JsIdentifierExpression("a3"))),
"length");
expr = JavascriptNullCheckAdder.AddNullChecks(expr);
var node = JsTemporaryVariableResolver.ResolveVariables(expr);
Assert.AreEqual("function(b){return (b=c?a:c2?a2:a3)==null?null:b.length;}()", node.FormatScript(), node.FormatScript(niceMode: true));
}