public SignatureHelp GetSignatureHelp(TextDocument document, Position position)
{
string text = document.Text;
int index = document.GetPosition(position);
string[] lines = text.Split('\n');
string line = lines[position.Line];
int startIndex = line.Substring(0, position.Character).LastIndexOf("(", StringComparison.Ordinal);
if (startIndex != -1)
{
string functionName = line.Substring(0, startIndex).Trim().Split(" ").Last();
// Remove the current line because it might contain errors.
lines[position.Line] = "";
DustContext currentContext = document.GetContextAtPosition(position, Project.CompileFile(string.Join('\n', lines)).GlobalContext);
Function function = currentContext.GetFunction(functionName);
StringBuilder labelBuilder = new StringBuilder($"{function.Name}(");
if (function.Parameters.Length > 0)
{
for (int i = 0; i < function.Parameters.Length; i++)
{
labelBuilder.Append($"{function.Parameters[i].Identifier.Name}: any");
if (i != function.Parameters.Length - 1)
{
labelBuilder.Append(", ");
}
}
}
labelBuilder.Append("): any");
return(new SignatureHelp
{
ActiveParameter = line.Substring(startIndex, line.IndexOf(")", startIndex, StringComparison.Ordinal) - startIndex).Count(character => character == ','),
ActiveSignature = 0,
Signatures = new[]
{
new SignatureInformation
{
Label = labelBuilder.ToString(),
Parameters = function.Parameters.Select(parameter => new ParameterInformation
{
Label = parameter.Identifier.Name + ": any"
}).ToArray()
}
}
});
}
return(new SignatureHelp());
}
public Hover GetHover(TextDocument document, Position position)
{
string word = document.GetWordAtPosition(position);
DustContext context = document.GetContextAtPosition(position, Project.CompileFile(document.Text).GlobalContext);
string content = "";
if (context.ContainsPropety(word))
{
content = context.GetProperty(word).GetDetail();
}
if (context.ContainsFunction(word))
{
content = context.GetFunction(word).GetDetail();
}
if (string.IsNullOrEmpty(content) == false)
{
return(new Hover
{
Contents = (StringOrObject <MarkedString>) $@"```dust
{content}
```"
});
}
return(new Hover());
/*
*
* string name = document.GetWordAtPosition(position);
* string[] lines = document.Text.Split('\n');
*
* lines[position.Line] = "";
*
* DustContext context = document.GetContextAtPosition(position, Project.CompileFile(string.Join('\n', lines)));
*
* Function function = context.GetFunction(name);
*
* if (function != null)
* {
* return new Hover
* {
* Contents = new StringOrObject<MarkedString>(new MarkedString
* {
* Value = function.GetDetail(),
* Language = "dust"
* })
* };
* }
*
* return new Hover();
*/
}