public CSharpHelperVisitor([NotNull] CSharpCodeVisitor csharpCodeVisitor,
[NotNull] CSharpCodeWriter writer,
[NotNull] CodeBuilderContext context)
: base(writer, context)
{
_csharpCodeVisitor = csharpCodeVisitor;
}
private void RenderTagOutput(string tagOutputMethodName)
{
CSharpCodeVisitor.RenderPreWriteStart(_writer, _context);
_writer.Write(ExecutionContextVariableName)
.Write(".")
.Write(_tagHelperContext.ExecutionContextOutputPropertyName)
.Write(".")
.WriteMethodInvocation(tagOutputMethodName, endLine: false)
.WriteEndMethodInvocation();
}
private void RenderTagOutput(string tagOutputMethodName)
{
// Rendering output is a runtime feature.
if (_designTimeMode)
{
return;
}
CSharpCodeVisitor.RenderPreWriteStart(_writer, _context);
_writer.Write(ExecutionContextVariableName)
.Write(".")
.Write(_tagHelperContext.ExecutionContextOutputPropertyName)
.Write(".")
.WriteMethodInvocation(tagOutputMethodName, endLine: false)
.WriteEndMethodInvocation();
}
public CSharpHelperVisitor(CSharpCodeWriter writer, CodeGeneratorContext context)
: base(writer, context)
{
_codeVisitor = new CSharpCodeVisitor(writer, context);
}
private void RenderTagHelperContent()
{
// Rendering output is a runtime feature.
if (_designTimeMode)
{
return;
}
_writer.Write("if (")
.Write(ExecutionContextVariableName)
.Write(".")
.Write(_tagHelperContext.ExecutionContextOutputPropertyName)
.Write(".")
.Write(_tagHelperContext.OutputContentSetPropertyName)
.WriteLine(")");
// At this point in the codegen, TagHelperOutput.Content is set. We need to use this to render the Content
// instead of executing the child content
using (_writer.BuildScope())
{
RenderTagOutput(_tagHelperContext.OutputGenerateContentMethodName);
}
_writer.Write("else if (")
.Write(ExecutionContextVariableName)
.Write(".")
.Write(_tagHelperContext.ExecutionContextChildContentRetrievedPropertyName)
.WriteLine(")");
// Render the body of the else if statement, at this point in the codegen the GetChildContentAsync method
// was invoked but the TagHelperOutput's Content was not set. Call into GetChildContentAsync to retrieve
// the cached value of the content so we don't execute the child content twice.
using (_writer.BuildScope())
{
CSharpCodeVisitor.RenderPreWriteStart(_writer, _context);
_writer.WriteInstanceMethodInvocation(ExecutionContextVariableName,
_tagHelperContext.ExecutionContextGetChildContentAsyncMethodName,
endLine: false);
_writer.Write(".Result")
.WriteEndMethodInvocation();
}
_writer.WriteLine("else");
// Render the body of the else statement, at this point in the codegen the GetChildContentAsync method
// was not invoked and the TagHelperOutput's Content was not set. Call into ExecuteChildContentAsync to
// to execute and render child content.
using (_writer.BuildScope())
{
if (!string.IsNullOrEmpty(_context.TargetWriterName))
{
_writer.WriteMethodInvocation(
_tagHelperContext.StartWritingScopeMethodName,
_context.TargetWriterName);
}
_writer.WriteInstanceMethodInvocation(
ExecutionContextVariableName,
_tagHelperContext.ExecutionContextExecuteChildContentAsyncMethodName,
endLine: false);
_writer.WriteLine(".Wait();");
if (!string.IsNullOrEmpty(_context.TargetWriterName))
{
_writer.WriteMethodInvocation(_tagHelperContext.EndWritingScopeMethodName);
}
}
}
public CSharpTypeMemberVisitor(CSharpCodeWriter writer, CodeGeneratorContext context)
: base(writer, context)
{
_csharpCodeVisitor = new CSharpCodeVisitor(writer, context);
}