/// <summary>
/// Gets a classifier for the given text buffer.
/// </summary>
/// <param name="buffer">The <see cref="ITextBuffer"/> to classify.</param>
/// <returns>A classifier for the text buffer, or null if the provider cannot do so in its current state.</returns>
public IClassifier GetClassifier(ITextBuffer buffer)
{
// only return a classifier when this is really our document
if (!factory.IsXSharpDocument(buffer))
{
return(null);
}
return(buffer.Properties.GetOrCreateSingletonProperty(creator: () =>
XSharpClassifier.GetColorizer(buffer, this.classificationRegistry, this.factory)));
}
private void registerClassifier()
{
if (_classifier == null)
{
_classifier = _buffer.GetClassifier();
if (_classifier != null)
{
_classifier.ClassificationChanged += Classifier_ClassificationChanged;
}
}
}
public IEnumerable <ITagSpan <IOutliningRegionTag> > GetTags(NormalizedSnapshotSpanCollection spans)
{
//yield break;
if (spans.Count == 0)
{
yield break;
}
// Try to retrieve an already parsed list of Tags
XSharpClassifier xsClassifier = buffer.GetClassifier();
if (xsClassifier != null)
{
//
ITextSnapshot snapshot = xsClassifier.Snapshot;
SnapshotSpan Span = new SnapshotSpan(snapshot, 0, snapshot.Length);
var classifications = xsClassifier.GetRegionTags();
SnapshotSpan fullSpan = new SnapshotSpan(spans[0].Start, spans[spans.Count - 1].End).TranslateTo(snapshot, SpanTrackingMode.EdgeExclusive);
int startLineNumber = fullSpan.Start.GetContainingLine().LineNumber;
int endLineNumber = fullSpan.End.GetContainingLine().LineNumber;
//
Stack <ClassificationSpan> startStack = new Stack <ClassificationSpan>();
// convert classifications to an array so there will be no crash when the classifications are changed
// in another thread.
// Now, let's have a look at all the Classifications we have in the document
foreach (var tag in classifications)
{
// Is it a Region ?
if (tag.ClassificationType.IsOfType(this.xsharpRegionStartType.Classification))
{
startStack.Push(tag);
}
else if (tag.ClassificationType.IsOfType(this.xsharpRegionStopType.Classification) && (startStack.Count > 0))
{
//
var startTag = startStack.Pop();
var startLine = startTag.Span.Start.GetContainingLine();
var endLine = tag.Span.End.GetContainingLine();
//
if (startTag.Span.Start < tag.Span.End &&
startLine.LineNumber <= endLineNumber &&
endLine.LineNumber >= startLineNumber)
{
SnapshotSpan sSpan;
try
{
sSpan = new SnapshotSpan(startLine.Start, endLine.End);
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("Incorrect span " + e.Message);
sSpan = new SnapshotSpan(startLine.Start, startLine.Start);
}
hoverText = sSpan.GetText();
if (hoverText.Length > 1024)
{
hoverText = hoverText.Substring(0, 1024) + "\r\n......";
}
//
sSpan = new SnapshotSpan(startLine.Start, startLine.End);
////the region starts at the beginning of the entity, and goes until the *end* of the line that ends.
yield return(new TagSpan <IOutliningRegionTag>(
new SnapshotSpan(startLine.End, endLine.End),
new OutliningRegionTag(false, true, ellipsis, hoverText)));
}
}
}
}
else
{
yield break;
}
}
public IEnumerable <ITagSpan <TextMarkerTag> > GetTags(NormalizedSnapshotSpanCollection spans)
{
// Todo: the classifier is now marking open and close keywords with (invisible) classification
// on another location the classifier is building regions based on Open/Close keywords.
// During this process of building regions we can also 'remember' the open/close pairs
// so we do not have to look for these in this code.
DateTime oStart, oEnd;
TimeSpan timeSpan;
oStart = DateTime.Now;
if (spans.Count == 0 || _currentChar == null) //there is no content in the buffer
{
yield break;
}
WriteOutputMessage($"GetTags() Spans: {spans.Count}");
//don't do anything if the current SnapshotPoint is not initialized or at the end of the buffer
if (!_currentChar.HasValue || _currentChar.Value.Position >= _currentChar.Value.Snapshot.Length)
{
yield break;
}
//hold on to a snapshot of the current character
SnapshotPoint currentChar = _currentChar.Value;
//if the requested snapshot isn't the same as the one the brace is on, translate our spans to the expected snapshot
if (spans[0].Snapshot != currentChar.Snapshot)
{
currentChar = currentChar.TranslateTo(spans[0].Snapshot, PointTrackingMode.Positive);
}
//get the current char and the previous char
SnapshotSpan pairSpan = new SnapshotSpan();
// check to see if we are on a closing or opening keyword
if (!cursorOnKwOpenClose(currentChar))
{
yield break;
}
// Try to Match Keywords
// Try to retrieve an already parsed list of Tags
XSharpClassifier xsClassifier = _buffer.GetClassifier();
if (xsClassifier == null)
{
yield break;
}
else
{
ITagSpan <TextMarkerTag> result1 = null;
ITagSpan <TextMarkerTag> result2 = null;
ITagSpan <TextMarkerTag> result3 = null;
ITagSpan <TextMarkerTag> result4 = null;
try
{
WriteOutputMessage("Match Open/Close keywords : " + oStart.ToString("hh:mm:ss.fff"));
ITextSnapshot snapshot = xsClassifier.Snapshot;
if (snapshot.Version != currentChar.Snapshot.Version)
{
yield break;
}
SnapshotSpan Span = new SnapshotSpan(snapshot, 0, snapshot.Length);
var classifications = xsClassifier.GetTags();
// We cannot use SortedList, because we may have several Classification that start at the same position
List <ClassificationSpan> sortedTags = new List <ClassificationSpan>();
foreach (var tag in classifications)
{
// Only keep the Brace matching Tags
if ((tag.ClassificationType.IsOfType(ColorizerConstants.XSharpKwOpenFormat)) ||
(tag.ClassificationType.IsOfType(ColorizerConstants.XSharpKwCloseFormat)))
{
sortedTags.Add(tag);
}
}
sortedTags.Sort((a, b) => a.Span.Start.Position.CompareTo(b.Span.Start.Position) * 1000 + string.Compare(a.ClassificationType.Classification, b.ClassificationType.Classification));
//
var tags = sortedTags.Where(x => currentChar.Position >= x.Span.Start.Position && currentChar.Position <= x.Span.End.Position);
foreach (var currentTag in tags)
{
var index = sortedTags.IndexOf(currentTag);
if (currentTag.ClassificationType.IsOfType(ColorizerConstants.XSharpKwOpenFormat) && result1 == null)
{
if (FindMatchingCloseTag(sortedTags, index, snapshot, out pairSpan))
{
var span = currentTag.Span;
result1 = new TagSpan <TextMarkerTag>(span, _tag);
result2 = new TagSpan <TextMarkerTag>(pairSpan, _tag);
}
}
else if (result3 == null)
{
if (FindMatchingOpenTag(sortedTags, index, snapshot, out pairSpan))
{
var span = currentTag.Span;
result3 = new TagSpan <TextMarkerTag>(pairSpan, _tag);
result4 = new TagSpan <TextMarkerTag>(span, _tag);
}
}
}
}
catch (Exception e)
{
XSettings.LogException(e, "KeywordMatchingTagger.GetTags failed");
}
finally
{
oEnd = DateTime.Now;
timeSpan = oEnd - oStart;
WriteOutputMessage("Finished Match Open/Close keywords: " + oEnd.ToString("hh:mm:ss.fff"));
WriteOutputMessage("Finished Match Open/Close keywords - total ms: " + timeSpan.TotalMilliseconds.ToString());
}
if (result1 != null)
{
yield return(result1);
}
if (result2 != null)
{
yield return(result2);
}
if (result3 != null)
{
yield return(result3);
}
if (result4 != null)
{
yield return(result4);
}
}
}