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Implemented function signature help, and added tests (#153)

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* Implemented function signature help, and added tests

* Incremental commit of changes from code review feedback

* Rename test

* Added check to make sure intellisense is enabled

* Use HoverTimeout instead of BindingTimeout
This commit is contained in:
Mitchell Sternke
2016-11-30 14:22:48 -08:00
committed by GitHub
parent 453ff9de15
commit c95933b7e1
3 changed files with 339 additions and 8 deletions
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73
src/Microsoft.SqlTools.ServiceLayer/LanguageServices/AutoCompleteHelper.cs
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@@ -15,6 +15,7 @@ using Microsoft.SqlServer.Management.SqlParser.Parser;
using Microsoft.SqlTools.ServiceLayer.Connection;
using Microsoft.SqlTools.ServiceLayer.LanguageServices.Contracts;
using Microsoft.SqlTools.ServiceLayer.SqlContext;
using Microsoft.SqlTools.ServiceLayer.Utility;
using Microsoft.SqlTools.ServiceLayer.Workspace;
using Microsoft.SqlTools.ServiceLayer.Workspace.Contracts;
@@ -679,5 +680,77 @@ namespace Microsoft.SqlTools.ServiceLayer.LanguageServices
return null;
}
}
/// <summary>
/// Converts a SQL Parser List of MethodHelpText objects into a VS Code SignatureHelp object
/// </summary>
internal static SignatureHelp ConvertMethodHelpTextListToSignatureHelp(List<Babel.MethodHelpText> methods, Babel.MethodNameAndParamLocations locations, int line, int column)
{
Validate.IsNotNull(nameof(methods), methods);
Validate.IsNotNull(nameof(locations), locations);
Validate.IsGreaterThan(nameof(line), line, 0);
Validate.IsGreaterThan(nameof(column), column, 0);
SignatureHelp help = new SignatureHelp();
help.Signatures = methods.Select(method =>
{
return new SignatureInformation()
{
// Signature label format: <name> param1, param2, ..., paramn RETURNS <type>
Label = method.Name + " " + method.Parameters.Select(parameter => parameter.Display).Aggregate((l, r) => l + "," + r) + " " + method.Type,
Documentation = method.Description,
Parameters = method.Parameters.Select(parameter =>
{
return new ParameterInformation()
{
Label = parameter.Display,
Documentation = parameter.Description
};
}).ToArray()
};
}).Where(method => method.Label.Contains(locations.Name)).ToArray();
if (help.Signatures.Length == 0)
{
return null;
}
// Find the matching method signature at the cursor's location
// For now, take the first match (since we've already filtered by name above)
help.ActiveSignature = 0;
// Determine the current parameter at the cursor
int currentParameter = -1; // Default case: not on any particular parameter
if (locations.ParamStartLocation != null)
{
// Is the cursor past the function name?
var location = locations.ParamStartLocation.Value;
if (line > location.LineNumber || (line == location.LineNumber && line == location.LineNumber && column >= location.ColumnNumber))
{
currentParameter = 0;
}
}
foreach (var location in locations.ParamSeperatorLocations)
{
// Is the cursor past a comma ',' and at least on the next parameter?
if (line > location.LineNumber || (line == location.LineNumber && column > location.ColumnNumber))
{
currentParameter++;
}
}
if (locations.ParamEndLocation != null)
{
// Is the cursor past the end of the parameter list on a different token?
var location = locations.ParamEndLocation.Value;
if (line > location.LineNumber || (line == location.LineNumber && line == location.LineNumber && column > location.ColumnNumber))
{
currentParameter = -1;
}
}
help.ActiveParameter = currentParameter;
return help;
}
}
}