/// <summary>
/// Gets the most recently parsed document.
/// </summary>
/// <param name="mostRecentDocument">The most recent fully-parsed document for the buffer.</param>
public void GetMostRecent(out UvssTextParserResult mostRecentDocument)
{
lock (syncObject)
{
mostRecentDocument = this.mostRecentDocument;
}
}
/// <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 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;
}
