private void OnTreeUpdateCompleted(object sender, TreeUpdatedEventArgs e)
{
if (IsEnabled && (e.UpdateType != TreeUpdateType.PositionsOnly || (_sections != null && _sections.Changed)))
{
BackgroundTask.DoTaskOnIdle();
}
}
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 void OnTreeUpdateCompleted(object sender, TreeUpdatedEventArgs e)
{
if (e.UpdateType != TreeUpdateType.PositionsOnly)
{
BackgroundTask.DoTaskOnIdle();
}
}
protected override void OnTextBufferChanged(object sender, TextContentChangedEventArgs e)
{
if (IsEnabled && e.Before.LineCount != e.After.LineCount)
{
BackgroundTask.DoTaskOnIdle();
}
base.OnTextBufferChanged(sender, e);
}
protected override void OnTextBufferChanged(object sender, TextContentChangedEventArgs e)
{
if (e.Before.LineCount != e.After.LineCount || (_sections != null && _sections.Changed(e.After)))
{
BackgroundTask.DoTaskOnIdle();
}
base.OnTextBufferChanged(sender, e);
}
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);
}
}
protected virtual void OnTextBufferChanged(object sender, TextContentChangedEventArgs e)
{
// In order to provide nicer experience when user presser and holds
// ENTER or DELETE or just types really fast, we are going to track
// regions optimistically and report changes without going through
// async or idle processing. Idle/async is still going to hit later.
if (e.Changes.Count > 0)
{
int start, oldLength, newLength;
TextUtility.CombineChanges(e, out start, out oldLength, out newLength);
int changeStart = Int32.MaxValue;
int changeEnd = 0;
lock (_regionsLock) {
// Remove affected regions and shift the remaining ones. Outlining
// regions are not sorted and can overlap. Hence linear search.
for (int i = 0; i < CurrentRegions.Count; i++)
{
var region = CurrentRegions[i];
if (region.End <= start)
{
continue;
}
if (region.Contains(start) && region.Contains(start + oldLength))
{
region.Expand(0, newLength - oldLength);
}
else if (region.Start >= start + oldLength)
{
region.Shift(newLength - oldLength);
}
else
{
changeStart = Math.Min(changeStart, region.Start);
changeEnd = Math.Max(changeEnd, region.End);
CurrentRegions.RemoveAt(i);
i--;
if (e.Changes.Count > 0)
{
// If we merged changes, this might be an overaggressive delete. Ensure
// that we'll do a full recalculation later.
BackgroundTask.DoTaskOnIdle();
}
}
}
}
// If there were previously any regions, make sure we notify our listeners of the changes
if ((CurrentRegions.Count > 0) || (changeStart < Int32.MaxValue))
{
CurrentRegions.TextBufferVersion = TextBuffer.CurrentSnapshot.Version.VersionNumber;
if (RegionsChanged != null)
{
changeEnd = (changeStart == Int32.MaxValue ? changeStart : changeEnd);
RegionsChanged(this, new OutlineRegionsChangedEventArgs(CurrentRegions, TextRange.FromBounds(changeStart, changeEnd)));
}
}
}
}
protected override void OnTextBufferChanged(object sender, TextContentChangedEventArgs e)
{
base.OnTextBufferChanged(sender, e);
BackgroundTask.DoTaskOnIdle();
}
public IndentBasedOutlineRegionBuilder(ITextBuffer textBuffer)
: base(textBuffer)
{
BackgroundTask.DoTaskOnIdle();
}