/// <summary>
/// Generates completion options for a manager script.
/// </summary>
/// <param name="code">Source code.</param>
/// <param name="offset">Offset of the cursor/caret in the source code.</param>
/// <param name="controlSpace">True iff this intellisense request was generated by the user pressing control + space.</param>
/// <returns>True if any completion options are found. False otherwise.</returns>
public bool GenerateScriptCompletions(string code, int offset, bool controlSpace = false)
{
CSharpParser parser = new CSharpParser();
SyntaxTree syntaxTree = parser.Parse(code);
string fileName = Path.GetTempFileName();
if (!File.Exists(fileName))
{
File.Create(fileName).Close();
}
File.WriteAllText(fileName, code);
syntaxTree.FileName = fileName;
syntaxTree.Freeze();
// Should probably take into account which namespaces the user is using and load the needed assemblies into the CSharpCompletion object
// string usings = syntaxTree.Descendants.OfType<UsingDeclaration>().Select(x => x.ToString()).Aggregate((x, y) => x + /* Environment.NewLine + */ y);
IDocument document = new ReadOnlyDocument(new StringTextSource(code), syntaxTree.FileName);
completionResult = completion.GetCompletions(document, offset, controlSpace);
// Set the trigger word for later use.
triggerWord = controlSpace ? completionResult.TriggerWord : string.Empty;
// If the user pressed control space, we assume they are trying to generate completions for a partially typed word.
// In this situation we need to filter the results based on what they have already typed.
// The exception is if the most recent character is a period.
// No idea why NRefactory can't do this for us.
if (controlSpace && !string.IsNullOrEmpty(completionResult.TriggerWord) && code[offset - 1] != '.')
{
// Filter items.
completionResult.CompletionData = completionResult.CompletionData.Where(item => GetMatchQuality(item.CompletionText, completionResult.TriggerWord) > 0).ToList();
}
List <CompletionData> completionList = completionResult.CompletionData.Select(x => x as CompletionData).Where(x => x != null).OrderBy(x => x.CompletionText).ToList();
view.Populate(completionList);
if (controlSpace && !string.IsNullOrEmpty(completionResult.TriggerWord))
{
view.SelectItem(completionList.IndexOf(completionList.OrderByDescending(x => GetMatchQuality(x.CompletionText, completionResult.TriggerWord)).FirstOrDefault()));
}
return(completionList.Any());
}
private void ShowCompletion(string enteredText, bool controlSpace)
{
if (!controlSpace)
{
Debug.WriteLine("Code Completion: TextEntered: " + enteredText);
}
else
{
Debug.WriteLine("Code Completion: Ctrl+Space");
}
//only process csharp files
if (String.IsNullOrEmpty(textEditor.Document.FileName))
{
return;
}
var fileExtension = Path.GetExtension(textEditor.Document.FileName);
fileExtension = fileExtension != null?fileExtension.ToLower() : null;
//check file extension to be a c# file (.cs, .csx, etc.)
if (fileExtension == null || (!fileExtension.StartsWith(".cs")))
{
return;
}
if (completionWindow == null)
{
CodeCompletionResult results = null;
try
{
results = CSharpCompletion.GetCompletions(textEditor.Document, textEditor.CaretOffset, controlSpace);
}
catch (Exception exception)
{
Debug.WriteLine("Error in getting completion: " + exception);
}
if (results == null)
{
return;
}
if (insightWindow == null && results.OverloadProvider != null)
{
insightWindow = new OverloadInsightWindow(textEditor.TextArea);
insightWindow.Provider = results.OverloadProvider;
insightWindow.Show();
insightWindow.Closed += (o, args) => insightWindow = null;
return;
}
if (completionWindow == null && results != null && results.CompletionData.Any())
{
// Open code completion after the user has pressed dot:
completionWindow = new CompletionWindow(textEditor.TextArea);
completionWindow.CloseWhenCaretAtBeginning = controlSpace;
completionWindow.StartOffset -= results.TriggerWordLength;
//completionWindow.EndOffset -= results.TriggerWordLength;
IList <ICompletionData> data = completionWindow.CompletionList.CompletionData;
foreach (var completion in results.CompletionData.OrderBy(item => item.Text))
{
data.Add(completion);
}
if (results.TriggerWordLength > 0)
{
//completionWindow.CompletionList.IsFiltering = false;
completionWindow.CompletionList.SelectItem(results.TriggerWord);
}
completionWindow.Show();
completionWindow.Closed += (o, args) => completionWindow = null;
}
}//end if
//update the insight window
if (!string.IsNullOrEmpty(enteredText) && insightWindow != null)
{
//whenver text is entered update the provider
var provider = insightWindow.Provider as CSharpOverloadProvider;
if (provider != null)
{
//since the text has not been added yet we need to tread it as if the char has already been inserted
provider.Update(textEditor.Document, textEditor.CaretOffset);
//if the windows is requested to be closed we do it here
if (provider.RequestClose)
{
insightWindow.Close();
insightWindow = null;
}
}
}
}//end method
