public override bool BuildRegions(OutlineRegionCollection newRegions)
{
lock (_threadLock) {
if (IsDisposed || !EditorTree.IsReady)
{
return(false);
}
AstRoot rootNode = null;
try {
// We are in a background thread so in order to walk the tree
// we must obtain the read lock first.
rootNode = EditorTree.AcquireReadLock(_treeUserId);
if (rootNode != null)
{
OutliningContext context = new OutliningContext();
context.Regions = newRegions;
// Walk the tree and construct new regions
rootNode.Accept(this, context);
OutlineSections(rootNode, context);
}
} catch (Exception) { } finally {
if (rootNode != null)
{
EditorTree.ReleaseReadLock(_treeUserId);
}
else
{
// Tree was busy. Will try again later.
GuardedOperations.DispatchInvoke(() => BackgroundTask.DoTaskOnIdle(), DispatcherPriority.Normal);
}
}
return(true);
}
}
private IEnumerable <IValidationError> Validate(AstRoot ast, CancellationToken ct)
{
var context = new ValidationContext(ct);
ast.Accept(this, context);
foreach (var v in _validators)
{
context.CancellationToken.ThrowIfCancellationRequested();
context.Errors.AddRange(v.ValidateWhitespace(ast.TextProvider));
}
return(context.Errors);
}
public override bool BuildRegions(OutlineRegionCollection newRegions)
{
lock (_threadLock)
{
if (IsDisposed || !EditorTree.IsReady)
{
return(false);
}
AstRoot rootNode = null;
try
{
rootNode = EditorTree.AcquireReadLock(_treeUserId);
if (rootNode != null)
{
OutliningContext context = new OutliningContext();
context.Regions = newRegions;
rootNode.Accept(this, context);
}
}
catch (Exception ex)
{
Debug.Fail(String.Format(CultureInfo.CurrentCulture, "Exception in outliner: {0}", ex.Message));
}
finally
{
if (rootNode != null)
{
EditorTree.ReleaseReadLock(_treeUserId);
}
else
{
// Tree was busy. Will try again later.
GuardedOperations.DispatchInvoke(() => BackgroundTask.DoTaskOnIdle(), DispatcherPriority.Normal);
}
}
return(true);
}
}
public object Visit(AstRoot node)
{
return(node.Accept(this));
}