protected OutlineRegionBuilder(ITextBuffer textBuffer)
{
CurrentRegions = new OutlineRegionCollection(0);
TextBuffer = textBuffer;
TextBuffer.Changed += OnTextBufferChanged;
BackgroundTask = new IdleTimeAsyncTask(TaskAction, MainThreadAction);
BackgroundTask.DoTaskOnIdle(300);
}
public virtual object Clone()
{
var clone = new OutlineRegionCollection(TextBufferVersion);
foreach (var item in this)
{
clone.Add(item.Clone() as OutlineRegion);
}
return(clone);
}
protected OutlineRegionBuilder(ITextBuffer textBuffer, IEditorShell editorShell)
{
CurrentRegions = new OutlineRegionCollection(0);
TextBuffer = textBuffer;
TextBuffer.Changed += OnTextBufferChanged;
BackgroundTask = new IdleTimeAsyncTask(TaskAction, MainThreadAction, editorShell);
if (IsEnabled)
{
BackgroundTask.DoTaskOnIdle(300);
}
}
protected OutlineRegionBuilder(ITextBuffer textBuffer, IServiceContainer services, bool isEnabled)
{
Services = services;
CurrentRegions = new OutlineRegionCollection(0);
TextBuffer = textBuffer;
TextBuffer.Changed += OnTextBufferChanged;
BackgroundTask = new IdleTimeAsyncTask(TaskAction, MainThreadAction, services);
if (isEnabled)
{
BackgroundTask.DoTaskOnIdle(300);
}
}
protected OutlineRegionBuilder(ITextBuffer textBuffer)
{
CurrentRegions = new OutlineRegionCollection(0);
TextBuffer = textBuffer;
TextBuffer.Changed += OnTextBufferChanged;
// Unit test case
if (EditorShell.IsUIThread)
{
BackgroundTask = new IdleTimeAsyncTask(TaskAction, MainThreadAction);
BackgroundTask.DoTaskOnIdle(300);
}
}
protected virtual ITextRange CompareRegions(
OutlineRegionCollection newRegions,
OutlineRegionCollection oldRegions, int upperBound)
{
TextRangeCollection <OutlineRegion> oldClone = null;
TextRangeCollection <OutlineRegion> newClone = null;
if (oldRegions != null)
{
oldClone = oldRegions.Clone() as OutlineRegionCollection;
oldClone.Sort();
}
newClone = newRegions.Clone() as OutlineRegionCollection;
newClone.Sort();
return(newClone.RangeDifference(oldClone, 0, upperBound));
}
protected virtual object TaskAction()
{
if (!IsDisposed)
{
var snapshot = TextBuffer.CurrentSnapshot;
var newRegions = new OutlineRegionCollection(snapshot.Version.VersionNumber);
var regionsBuilt = BuildRegions(newRegions);
if (regionsBuilt)
{
lock (_regionsLock) {
var changedRange = CompareRegions(newRegions, CurrentRegions, snapshot.Length);
return(new OutlineRegionsChange(changedRange, newRegions));
}
}
}
return(null);
}
private void OnRegionsChanged(object sender, OutlineRegionsChangedEventArgs e)
{
ITextSnapshot snapshot = _textBuffer.CurrentSnapshot;
if (e.Regions.TextBufferVersion == _textBuffer.CurrentSnapshot.Version.VersionNumber)
{
// Update the regions before firing the notification, as core editor
// may ask for the regions during the notification.
_currentRegions = e.Regions;
if (TagsChanged != null)
{
int start = e.ChangedRange.Start;
if (start < snapshot.Length)
{
int end = Math.Min(e.ChangedRange.End, snapshot.Length);
TagsChanged(this, new SnapshotSpanEventArgs(
new SnapshotSpan(snapshot, Span.FromBounds(start, end))));
}
}
}
}
public OutlineRegionsChangedEventArgs(OutlineRegionCollection regions, ITextRange changedRange)
{
Regions = regions;
ChangedRange = changedRange;
}
public abstract bool BuildRegions(OutlineRegionCollection newRegions);
public OutlineRegionsChange(ITextRange changedRange, OutlineRegionCollection newRegions)
{
ChangedRange = changedRange;
NewRegions = newRegions;
}
