/// <summary>
/// Gets the most recently parsed document.
/// </summary>
/// <param name="mostRecentDocument">The most recent fully-parsed document for the buffer.</param>
/// <returns>The task that was used to generate the document.</returns>
public Task<UvssTextParserResult> GetMostRecent(out UvssTextParserResult mostRecentDocument)
{
lock (syncObject)
{
mostRecentDocument = this.mostRecentDocument;
return taskComplete;
}
}
/// <summary>
/// Gets the most recently parsed document.
/// </summary>
/// <param name="mostRecentDocument">The most recent fully-parsed document for the buffer.</param>
/// <returns>The task that was used to generate the document.</returns>
public Task <UvssTextParserResult> GetMostRecent(out UvssTextParserResult mostRecentDocument)
{
lock (syncObject)
{
mostRecentDocument = this.mostRecentDocument;
return(taskComplete);
}
}
/// <summary>
/// Visits the specified UVSS document and returns a list of classification spans that
/// intersect with the specified span.
/// </summary>
/// <param name="document">The document to visit.</param>
/// <param name="span">The span for which to retrieve classification spans.</param>
/// <returns>The classification spans that intersect with the specified span.</returns>
public IList<ClassificationSpan> VisitDocument(UvssTextParserResult result, SnapshotSpan span)
{
if (result.Document == null)
return null;
span = span.TranslateTo(result.Snapshot, SpanTrackingMode.EdgeExclusive);
var results = new List<ClassificationSpan>();
var visitor = new UvssClassifierVisitor(registry, (start, width, type, kind) =>
{
var nodeSpan = new SnapshotSpan(span.Snapshot, start, width);
if (nodeSpan.IntersectsWith(span))
results.Add(new ClassificationSpan(nodeSpan, type));
});
visitor.Visit(result.Document);
return results;
}
/// <summary>
/// Gets a task which produces a UVSS document for the specified text snapshot.
/// </summary>
/// <param name="snapshot">The snapshot for which to return a task.</param>
/// <param name="mostRecentDocument">The most recent fully-parsed document for the buffer.</param>
/// <returns>The task that was retrieved for the specified snapshot.</returns>
public Task<UvssTextParserResult> GetParseTask(ITextSnapshot snapshot, out UvssTextParserResult mostRecentDocument)
{
lock (syncObject)
{
var requestedVersion = snapshot.Version;
if (versionComplete != null && versionComplete.VersionNumber >= requestedVersion.VersionNumber)
{
mostRecentDocument = this.mostRecentDocument;
return taskComplete;
}
if (versionProcessing != null && versionProcessing.VersionNumber >= requestedVersion.VersionNumber)
{
mostRecentDocument = this.mostRecentDocument;
return taskProcessing;
}
if (taskQueued != null)
{
mostRecentDocument = this.mostRecentDocument;
return taskQueued;
}
}
var task = default(Task<UvssTextParserResult>);
task = new Task<UvssTextParserResult>(() =>
{
ITextVersion version;
lock (syncObject)
{
version = buffer.CurrentSnapshot.Version;
versionProcessing = version;
}
var currentSnapshot = buffer.CurrentSnapshot;
var source = currentSnapshot.GetText();
var document = UvssParser.Parse(source);
var result = new UvssTextParserResult(currentSnapshot, document);
lock (syncObject)
{
this.mostRecentDocument = result;
versionComplete = version;
versionProcessing = null;
taskComplete = task;
taskProcessing = null;
if (taskQueued != null)
{
taskProcessing = taskQueued;
taskQueued = null;
taskProcessing.Start();
}
}
RaiseDocumentParsed(new UvssTextParserEventArgs(result));
return result;
});
lock (syncObject)
{
if (taskProcessing == null)
{
taskProcessing = task;
taskProcessing.Start();
}
else
{
taskQueued = new Task<UvssTextParserResult>(() =>
{
Task.Delay(QueuedTaskDelay).Wait();
task.Start();
return task.Result;
});
}
}
mostRecentDocument = this.mostRecentDocument;
return task;
}
/// <summary>
/// Called when a UVSS document is generated by the parser service.
/// </summary>
private void OnDocumentGenerated(UvssTextParserResult result)
{
lock (errors)
{
errors.Clear();
if (result.Document != null)
{
var diagnostics = result.Document.GetDiagnostics().Where(x => x.Severity == DiagnosticSeverity.Error).ToList();
var diagnosticErrors = diagnostics.Select(x =>
{
var errorSpan = new SnapshotSpan(result.Snapshot, x.Location.Start, x.Location.Length);
return new Error(textDocument.FilePath, errorSpan, x);
});
errors.AddRange(diagnosticErrors);
}
errorsDirty = true;
}
}
/// <summary>
/// Gets a task which produces a UVSS document for the specified text snapshot.
/// </summary>
/// <param name="snapshot">The snapshot for which to return a task.</param>
/// <param name="mostRecentDocument">The most recent fully-parsed document for the buffer.</param>
/// <returns>The task that was retrieved for the specified snapshot.</returns>
public Task <UvssTextParserResult> GetParseTask(ITextSnapshot snapshot, out UvssTextParserResult mostRecentDocument)
{
lock (syncObject)
{
var requestedVersion = snapshot.Version;
if (versionComplete != null && versionComplete.VersionNumber >= requestedVersion.VersionNumber)
{
mostRecentDocument = this.mostRecentDocument;
return(taskComplete);
}
if (versionProcessing != null && versionProcessing.VersionNumber >= requestedVersion.VersionNumber)
{
mostRecentDocument = this.mostRecentDocument;
return(taskProcessing);
}
if (taskQueued != null)
{
mostRecentDocument = this.mostRecentDocument;
return(taskQueued);
}
}
var task = default(Task <UvssTextParserResult>);
task = new Task <UvssTextParserResult>(() =>
{
ITextVersion version;
lock (syncObject)
{
version = buffer.CurrentSnapshot.Version;
versionProcessing = version;
}
var currentSnapshot = buffer.CurrentSnapshot;
var source = currentSnapshot.GetText();
var document = UvssParser.Parse(source);
var result = new UvssTextParserResult(currentSnapshot, document);
lock (syncObject)
{
this.mostRecentDocument = result;
versionComplete = version;
versionProcessing = null;
taskComplete = task;
taskProcessing = null;
if (taskQueued != null)
{
taskProcessing = taskQueued;
taskQueued = null;
taskProcessing.Start();
}
}
RaiseDocumentParsed(new UvssTextParserEventArgs(result));
return(result);
});
lock (syncObject)
{
if (taskProcessing == null)
{
taskProcessing = task;
taskProcessing.Start();
}
else
{
taskQueued = new Task <UvssTextParserResult>(() =>
{
Task.Delay(QueuedTaskDelay).Wait();
task.Start();
return(task.Result);
});
}
}
mostRecentDocument = this.mostRecentDocument;
return(task);
}
/// <summary>
/// Initializes a new instance of the <see cref="UvssTextParserEventArgs"/> class.
/// </summary>
/// <param name="result">The result of the parsing operation.</param>
public UvssTextParserEventArgs(UvssTextParserResult result)
{
this.Result = result;
}
/// <summary>
/// Initializes a new instance of the <see cref="UvssTextParserEventArgs"/> class.
/// </summary>
/// <param name="result">The result of the parsing operation.</param>
public UvssTextParserEventArgs(UvssTextParserResult result)
{
this.Result = result;
}