/// <summary>
/// Starts the fast operations to be executed at every user interaction with the <see cref="RichTextBox"/>.
/// </summary>
/// <param name="richTextBox">
/// The <see cref="RichTextBox"/> which text was changed.
/// </param>
/// <param name="eventArgs">
/// The <see cref="TextChangedEventArgs"/> containing specific information about the user interaction.
/// </param>
/// <param name="scheduler">
/// The <see cref="TaskScheduler"/> containing GUI-context.
/// </param>
/// <returns>
/// The <see cref="Task"/>.
/// </returns>
/// <exception cref="ArgumentNullException">
/// One or all of the parameters was/ were passed as null.
/// </exception>
public static async Task CodeAlteredAsync(RichTextBox richTextBox, TextChangedEventArgs eventArgs, TaskScheduler scheduler)
{
if (richTextBox == null)
{
throw new ArgumentNullException("richTextBox");
}
if (eventArgs == null)
{
throw new ArgumentNullException("eventArgs");
}
if (scheduler == null)
{
throw new ArgumentNullException("scheduler");
}
if (NoTextChangedPlox)
{
return;
}
var text =
new TextRange(richTextBox.Document.ContentStart, richTextBox.Document.ContentEnd).Text.Replace(
" ",
string.Empty);
if (richTextBox.Document == null || text == "\r\n")
{
RecognitionEngine.AllWordsInCode.Clear();
MistakeEngine.Mistakes.Clear();
MainWindow.ErrorListView.Items.Clear();
return;
}
TextChange textChange = null;
var textChanges = eventArgs.Changes;
if (textChanges != null && textChanges.Count > 0)
{
textChange = textChanges.First();
}
if (textChange == null || (textChange.AddedLength <= 0 && textChange.RemovedLength <= 0))
{
return;
}
IEnumerable <Word> changedWords = RecognitionEngine.RecognizeWordsInCode(richTextBox.CaretPosition, CurrentProgrammingLanguage).Result;
var newWord = changedWords.First();
if (newWord.Content == string.Empty)
{
await FacilitateCoding.PseudoSenseAsync(newWord, RecognitionEngine.AllWordsInCode, CurrentProgrammingLanguage, MainWindow.CodeListBox);
return;
}
switch (pseudoSenseTask.Status)
{
case TaskStatus.Created:
pseudoSenseTask.Start(scheduler);
break;
case TaskStatus.RanToCompletion:
case TaskStatus.Faulted:
pseudoSenseTask.Dispose();
pseudoSenseTask = new Task(
() => FacilitateCoding.PseudoSenseAsync(newWord, RecognitionEngine.AllWordsInCode, CurrentProgrammingLanguage, MainWindow.CodeListBox),
cancellationToken.Token,
TaskCreationOptions.LongRunning);
pseudoSenseTask.Start(scheduler);
break;
}
}