private void ShowOverloadInsightWindow(FunctionCompletionData function)
{
// Close all existing IntelliSense windows.
_overloadInsightWindow?.Close();
_completionWindow?.Close();
// Abort if we have no info to show.
if (function == null || function.Signatures == null || function.Signatures.Length == 0)
{
return;
}
// Create new OverloadInsightWindow with data.
_overloadInsightWindow = new OverloadInsightWindow(_textEditor.TextArea);
OverloadProvider provider = new OverloadProvider();
for (int i = 0; i < function.Signatures.Length; i++)
{
provider.Overloads.Add(new OverloadDescription(
string.Format(CultureInfo.InvariantCulture, "{0}/{1}", i + 1, function.Signatures.Length),
function.Signatures[i],
function.Description));
}
_overloadInsightWindow.Provider = provider;
// Auto-delete instance when window is closed.
_overloadInsightWindow.Closed += delegate { _overloadInsightWindow = null; };
// Show window.
_overloadInsightWindow.Show();
}
/// <summary>
/// Requests the insight window.
/// </summary>
/// <param name="key">
/// The currently pressed key which is not yet inserted in the document.
/// </param>
/// <remarks>
/// This method should be called whenever the user types a new character.
/// </remarks>
private void RequestInsightWindow(char key)
{
// The insight window is shown when '(' or a ',' of a function signature is typed.
if (key != '(' && key != ',')
{
return;
}
// Identify the region at the cursor position
var document = _textEditor.Document;
int caretOffset = _textEditor.TextArea.Caret.Offset;
ShaderRegion region = _parser.IdentifyRegion(document, caretOffset);
// Fetch lookup tables for the given region.
NamedObjectCollection <NamedCompletionData>[] lookupTables = GetInsightLookupTables(region);
if (lookupTables == null)
{
return;
}
// Find the name of the function.
int offset = caretOffset;
if (offset == 0)
{
return;
}
string identifier = null;
if (key == '(')
{
// Code should look like this:
// "Function|"
int startOfIdentifier = TextUtilities.FindStartOfIdentifier(document, offset - 1);
if (startOfIdentifier >= 0)
{
identifier = document.GetText(startOfIdentifier, offset - startOfIdentifier);
}
}
else if (key == ',')
{
// Check whether we are inside a parameter list.
// "Function(param1, param2|"
offset = TextUtilities.FindOpeningBracket(document, offset - 1, '(', ')');
identifier = TextUtilities.GetIdentifierAt(document, offset - 1);
}
// Fetch the function description.
FunctionCompletionData function = null;
if (!string.IsNullOrEmpty(identifier))
{
foreach (NamedObjectCollection <NamedCompletionData> lookupTable in lookupTables)
{
if (lookupTable.TryGet(identifier, out function))
{
break;
}
}
}
ShowOverloadInsightWindow(function);
}