/// <summary>
/// Idle time event handler. Retrieves results from the validation task queue,
/// creates new error tags (squiggles) and fires an event telling editor that
/// tags changed. The code must operate on UI thread and hence it is called on idle.
/// </summary>
/// <param name="sender"></param>
/// <param name="eventArgs"></param>
private void OnIdle(object sender, EventArgs eventArgs)
{
if (_settings.SyntaxCheckEnabled && _textBuffer != null)
{
if (_resultsQueue.Count > 0)
{
var addedTags = new List <IEditorTaskListItem>();
var changedRange = _errorTags.BeginUpdate();
changedRange = TextRange.Intersection(changedRange, 0, _textBuffer.CurrentSnapshot.Length);
var timer = Stopwatch.StartNew();
timer.Reset();
while (timer.ElapsedMilliseconds < 100)
{
if (!_resultsQueue.TryDequeue(out var error))
{
break;
}
if (string.IsNullOrEmpty(error.Message))
{
// Empty message means remove all errors.
changedRange = new TextRange(0, _textBuffer.CurrentSnapshot.Length);
}
else
{
var tag = new EditorErrorTag(_document.EditorTree, error);
if (tag.Length > 0)
{
if (changedRange.End == 0)
{
changedRange = tag;
}
else
{
changedRange = changedRange.Union(tag);
}
_errorTags.Add(tag);
addedTags.Add(tag);
}
}
}
_errorTags.EndUpdate(changedRange.Length > 0);
// Clip range to the current snapshot
var start = Math.Max(changedRange.Start, 0);
start = Math.Min(start, _textBuffer.CurrentSnapshot.Length);
var end = Math.Min(changedRange.End, _textBuffer.CurrentSnapshot.Length);
if (changedRange.Length > 0)
{
TagsChanged?.Invoke(this, new SnapshotSpanEventArgs(new SnapshotSpan(_textBuffer.CurrentSnapshot, start, end - start)));
}
BeginUpdatingTasks?.Invoke(this, EventArgs.Empty);
try {
if (addedTags.Count > 0)
{
TasksAdded?.Invoke(this, new TasksListItemsChangedEventArgs(addedTags));
}
if (_errorTags.RemovedTags.Count > 0)
{
var removedTags = new List <IEditorTaskListItem>();
while (_errorTags.RemovedTags.Count > 0)
{
if (_errorTags.RemovedTags.TryDequeue(out var tag))
{
removedTags.Add(tag);
}
}
if (removedTags.Count > 0)
{
TasksRemoved?.Invoke(this, new TasksListItemsChangedEventArgs(removedTags));
}
}
} finally {
EndUpdatingTasks?.Invoke(this, EventArgs.Empty);
}
timer.Stop();
}
}
}
/// <summary>
/// Idle time event handler. Retrieves results from the validation task queue,
/// creates new error tags (squiggles) and fires an event telling editor that
/// tags changed. The code must operate on UI thread and hence it is called on idle.
/// </summary>
/// <param name="sender"></param>
/// <param name="eventArgs"></param>
private void OnIdle(object sender, EventArgs eventArgs)
{
if (_settings.SyntaxCheckEnabled && _textBuffer != null)
{
if (ResultsQueue.Count > 0)
{
_fireCodeMarkerUponCompletion = true;
var addedTags = new List <IEditorTaskListItem>();
var changedRange = _errorTags.BeginUpdate();
changedRange = TextRange.Intersection(changedRange, 0, _textBuffer.CurrentSnapshot.Length);
var timer = Stopwatch.StartNew();
timer.Reset();
while (timer.ElapsedMilliseconds < 100)
{
if (!ResultsQueue.TryDequeue(out var error))
{
break;
}
if (string.IsNullOrEmpty(error.Message))
{
// Empty message means remove all error for the element.
var removedRange = TextRange.EmptyRange; // _errorTags.RemoveTagsForNode(error.NodeKey);
// Only update changedRange if there were errors removed
if (removedRange.End > 0)
{
if (changedRange.End == 0)
{
changedRange = removedRange;
}
else
{
changedRange = changedRange.Union(removedRange);
}
}
}
else
{
var tag = new EditorErrorTag(_document.EditorTree, error);
if (tag.Length > 0)
{
if (changedRange.End == 0)
{
changedRange = tag;
}
else
{
changedRange = changedRange.Union(tag);
}
_errorTags.Add(tag);
addedTags.Add(tag);
}
}
}
_errorTags.EndUpdate(changedRange.Length > 0);
// Clip range to the current snapshot
var start = Math.Max(changedRange.Start, 0);
start = Math.Min(start, _textBuffer.CurrentSnapshot.Length);
var end = Math.Min(changedRange.End, _textBuffer.CurrentSnapshot.Length);
if (changedRange.Length > 0)
{
TagsChanged?.Invoke(this, new SnapshotSpanEventArgs(new SnapshotSpan(_textBuffer.CurrentSnapshot, start, end - start)));
}
BeginUpdatingTasks?.Invoke(this, EventArgs.Empty);
try {
if (addedTags.Count > 0)
{
TasksAdded?.Invoke(this, new TasksListItemsChangedEventArgs(addedTags));
}
if (_errorTags.RemovedTags.Count > 0)
{
var removedTags = new List <IEditorTaskListItem>();
while (_errorTags.RemovedTags.Count > 0)
{
if (_errorTags.RemovedTags.TryDequeue(out var tag))
{
removedTags.Add(tag);
}
}
if (removedTags.Count > 0)
{
TasksRemoved?.Invoke(this, new TasksListItemsChangedEventArgs(removedTags));
}
}
} finally {
EndUpdatingTasks?.Invoke(this, EventArgs.Empty);
}
timer.Stop();
}
if (_fireCodeMarkerUponCompletion && (ResultsQueue.Count == 0))
{
// Use this flag so we don't incessantly fire this code marker on every idle.
// TODO: Even this isn't quite correct, as it's possible that a validator
// yet pushed all it's entries into the results queue. There should really
// be a notification from the validators to indicate their completeness. If there
// were such a notification, then we could actually even unhook ourselves from idle.
_fireCodeMarkerUponCompletion = false;
}
}
}