public static Task<IFunctionInfo> GetFunctionInfoAsync(IFunctionIndex functionIndex, string functionName) {
var tcs = new TaskCompletionSource<IFunctionInfo>();
var result = functionIndex.GetFunctionInfo(functionName, null, (o, p) => {
var r = functionIndex.GetFunctionInfo(functionName, p);
tcs.TrySetResult(r);
});
if (result != null) {
tcs.TrySetResult(result);
}
return tcs.Task;
}
public static Task <IFunctionInfo> GetFunctionInfoAsync(IFunctionIndex functionIndex, string functionName)
{
var tcs = new TaskCompletionSource <IFunctionInfo>();
var result = functionIndex.GetFunctionInfo(functionName, o => {
var r = functionIndex.GetFunctionInfo(functionName);
tcs.TrySetResult(r);
});
if (result != null)
{
tcs.TrySetResult(result);
}
return(tcs.Task);
}
public static async Task <IFunctionInfo> GetFunctionInfoAsync(this IFunctionIndex functionIndex, string functionName, string packageName = null)
{
var fi = functionIndex.GetFunctionInfo(functionName, packageName);
if (fi != null)
{
return(fi);
}
packageName = await functionIndex.GetPackageNameAsync(functionName);
if (!string.IsNullOrEmpty(packageName))
{
return(functionIndex.GetFunctionInfo(functionName, packageName));
}
return(null);
}
public static void GetFunctionInfoAsync(this IFunctionIndex functionIndex, string functionName, string packageName, Action <IFunctionInfo, object> callback, object parameter = null)
{
var fi = functionIndex.GetFunctionInfo(functionName, packageName);
if (fi != null)
{
callback(fi, parameter);
}
else
{
GetFunctionInfoFromPackageAsync(functionIndex, functionName, packageName, callback, parameter).DoNotWait();
}
}
private static async Task GetFunctionInfoFromPackageAsync(IFunctionIndex functionIndex, string functionName, string packageName, Action <IFunctionInfo, object> callback, object parameter)
{
IFunctionInfo fi = null;
packageName = packageName ?? await functionIndex.GetPackageNameAsync(functionName);
if (!string.IsNullOrEmpty(packageName))
{
fi = functionIndex.GetFunctionInfo(functionName, packageName);
}
await functionIndex.Services.MainThread().SwitchToAsync();
callback(fi, parameter);
}
/// <summary>
/// Extracts information on the current function in the completion context, if any.
/// </summary>
/// <returns></returns>
private IFunctionInfo GetFunctionInfo(IRIntellisenseContext context)
{
// Retrieve parameter positions from the current text buffer snapshot
IFunctionInfo functionInfo = null;
var parametersInfo = context.AstRoot.GetSignatureInfoFromBuffer(context.EditorBuffer.CurrentSnapshot, context.Position);
if (parametersInfo != null)
{
// User-declared functions take priority
functionInfo = context.AstRoot.GetUserFunctionInfo(parametersInfo.FunctionName, context.Position)
?? _functionIndex.GetFunctionInfo(parametersInfo.FunctionName, null);
}
return(functionInfo);
}
/// <summary>
/// Extracts information on the current function in the completion context, if any.
/// </summary>
/// <returns></returns>
private IFunctionInfo GetFunctionInfo(RCompletionContext context)
{
// Retrieve parameter positions from the current text buffer snapshot
IFunctionInfo functionInfo = null;
ParameterInfo parametersInfo = SignatureHelp.GetParametersInfoFromBuffer(context.AstRoot, context.TextBuffer.CurrentSnapshot, context.Position);
if (parametersInfo != null)
{
// User-declared functions take priority
functionInfo = context.AstRoot.GetUserFunctionInfo(parametersInfo.FunctionName, context.Position);
if (functionInfo == null)
{
// Get collection of function signatures from documentation (parsed RD file)
functionInfo = _functionIndex.GetFunctionInfo(parametersInfo.FunctionName, null, (o, p) => { }, context.Session.TextView);
}
}
return(functionInfo);
}
