public void CachePhaseElement(FrameworkElement phaseElement, int phase)
{
if (phase < 0)
{
throw new ArgumentOutOfRangeException("phase");
}
if (phase <= 0)
{
return;
}
UIElement contentTemplateRoot = IncrementalUpdater.FindContentTemplateRoot(phaseElement);
if (contentTemplateRoot != null)
{
// get the cache for this element
ElementCacheRecord elementCacheRecord;
if (!this.elementCache.TryGetValue(contentTemplateRoot, out elementCacheRecord))
{
elementCacheRecord = new ElementCacheRecord();
this.elementCache.Add(contentTemplateRoot, elementCacheRecord);
}
// get the cache for this phase
int phaseIndex = elementCacheRecord.Phases.BinarySearch(phase);
if (phaseIndex < 0)
{
// not found - insert
phaseIndex = ~phaseIndex;
elementCacheRecord.Phases.Insert(phaseIndex, phase);
elementCacheRecord.ElementsByPhase.Insert(phaseIndex, new List <PhasedElementRecord>());
}
List <PhasedElementRecord> phasedElementRecords = elementCacheRecord.ElementsByPhase[phaseIndex];
// first see if the element is already there
for (int i = 0; i < phasedElementRecords.Count; i++)
{
if (phasedElementRecords[i].FrameworkElement == phaseElement)
{
return;
}
}
// insert the element
phasedElementRecords.Add(new PhasedElementRecord(phaseElement));
}
}
public void UncachePhaseElement(FrameworkElement phaseElement, int phase)
{
if (phase <= 0)
{
return;
}
UIElement contentTemplateRoot = IncrementalUpdater.FindContentTemplateRoot(phaseElement);
if (contentTemplateRoot != null)
{
// get the cache for this element
ElementCacheRecord elementCacheRecord;
if (this.elementCache.TryGetValue(contentTemplateRoot, out elementCacheRecord))
{
// get the cache for this phase
int phaseIndex = elementCacheRecord.Phases.BinarySearch(phase);
if (phaseIndex >= 0)
{
// remove the element: the linear search here is not spectacular but the list should be very short
List <PhasedElementRecord> phasedElementRecords = elementCacheRecord.ElementsByPhase[phaseIndex];
for (int i = 0; i < phasedElementRecords.Count; i++)
{
if (phasedElementRecords[i].FrameworkElement == phaseElement)
{
phasedElementRecords[i].ThawAndShow();
phasedElementRecords.RemoveAt(i);
if (phasedElementRecords.Count == 0)
{
elementCacheRecord.Phases.RemoveAt(phaseIndex);
elementCacheRecord.ElementsByPhase.RemoveAt(phaseIndex);
}
}
}
}
}
}
}