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);
}
}
/// <summary>
/// Resumes tree updates. If changes were made to the text buffer
/// since suspend, full parse is performed.
/// </summary>
internal void Resume()
{
if (UpdatesSuspended)
{
UpdatesSuspended = false;
if (TextBufferChangedSinceSuspend)
{
TextBufferChangedSinceSuspend = false;
GuardedOperations.DispatchInvoke(() =>
ProcessPendingTextBufferChanges(async: true),
DispatcherPriority.ApplicationIdle);
}
}
}
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);
}
}