// Token: 0x060076FF RID: 30463 RVA: 0x00220044 File Offset: 0x0021E244
private ViewRecord CacheView(object collection, CollectionViewSource cvs, CollectionView cv, ViewRecord vr)
{
CollectionRecord collectionRecord = this[collection];
ViewTable viewTable = collectionRecord.ViewTable;
if (viewTable == null)
{
viewTable = new ViewTable();
collectionRecord.ViewTable = viewTable;
if (!(collection is INotifyCollectionChanged))
{
this._inactiveViewTables.Add(viewTable, 2);
}
}
if (vr == null)
{
vr = new ViewRecord(cv);
}
else if (cv == null)
{
cv = (CollectionView)vr.View;
}
cv.SetViewManagerData(viewTable);
viewTable[cvs] = vr;
return(vr);
}
internal void RegisterCollectionSynchronizationCallback(
IEnumerable collection,
object context,
CollectionSynchronizationCallback synchronizationCallback)
{
CollectionRecord cr = EnsureCollectionRecord(collection);
cr.SynchronizationInfo = new SynchronizationInfo(context, synchronizationCallback);
ViewTable vt = cr.ViewTable;
if (vt != null)
{
bool isSynchronized = cr.SynchronizationInfo.IsSynchronized;
foreach (DictionaryEntry de in vt)
{
ViewRecord vr = (ViewRecord)de.Value;
CollectionView cv = vr.View as CollectionView;
if (cv != null)
{
cv.SetAllowsCrossThreadChanges(isSynchronized);
}
}
}
}
// Token: 0x06007700 RID: 30464 RVA: 0x002200BC File Offset: 0x0021E2BC
internal bool Purge()
{
int count = this._inactiveViewTables.Count;
if (count > 0)
{
ViewTable[] array = new ViewTable[count];
this._inactiveViewTables.Keys.CopyTo(array, 0);
for (int i = 0; i < count; i++)
{
ViewTable key = array[i];
int num = (int)this._inactiveViewTables[key];
if (--num > 0)
{
this._inactiveViewTables[key] = num;
}
else
{
this._inactiveViewTables.Remove(key);
}
}
}
ArrayList arrayList = new ArrayList();
bool flag = false;
foreach (object obj in this)
{
DictionaryEntry dictionaryEntry = (DictionaryEntry)obj;
WeakRefKey weakRefKey = (WeakRefKey)dictionaryEntry.Key;
CollectionRecord collectionRecord = (CollectionRecord)dictionaryEntry.Value;
if (weakRefKey.Target == null || !collectionRecord.IsAlive)
{
arrayList.Add(weakRefKey);
}
else
{
ViewTable viewTable = collectionRecord.ViewTable;
if (viewTable != null && viewTable.Purge())
{
flag = true;
if (viewTable.Count == 0)
{
collectionRecord.ViewTable = null;
if (!collectionRecord.IsAlive)
{
arrayList.Add(weakRefKey);
}
}
}
}
}
for (int j = 0; j < arrayList.Count; j++)
{
base.Remove(arrayList[j]);
}
return(arrayList.Count > 0 || flag);
}
// return an existing view (or null if there isn't one) over the collection
private ViewRecord GetExistingView(object collection, CollectionViewSource cvs, Type collectionViewType, Func <object, object> GetSourceItem)
{
ViewRecord result;
CollectionView cv = collection as CollectionView;
if (cv == null)
{
// look up cached entry
CollectionRecord cr = EnsureCollectionRecord(collection, GetSourceItem);
ViewTable vt = cr.ViewTable;
if (vt != null)
{
ViewRecord vr = vt[cvs];
if (vr != null)
{
cv = (CollectionView)vr.View;
}
result = vr;
// activity on the VT - reset its expiration date
if (_inactiveViewTables.Contains(vt))
{
_inactiveViewTables[vt] = InactivityThreshold;
}
}
else
{
result = null;
}
}
else
{
// the collection is already a view, just use it directly (no tables needed)
result = new ViewRecord(cv);
}
if (cv != null)
{
ValidateViewType(cv, collectionViewType);
}
return(result);
}
// Token: 0x060076FA RID: 30458 RVA: 0x0021FEC8 File Offset: 0x0021E0C8
internal void RegisterCollectionSynchronizationCallback(IEnumerable collection, object context, CollectionSynchronizationCallback synchronizationCallback)
{
CollectionRecord collectionRecord = this.EnsureCollectionRecord(collection, null);
collectionRecord.SynchronizationInfo = new SynchronizationInfo(context, synchronizationCallback);
ViewTable viewTable = collectionRecord.ViewTable;
if (viewTable != null)
{
bool isSynchronized = collectionRecord.SynchronizationInfo.IsSynchronized;
foreach (object obj in viewTable)
{
ViewRecord viewRecord = (ViewRecord)((DictionaryEntry)obj).Value;
CollectionView collectionView = viewRecord.View as CollectionView;
if (collectionView != null)
{
collectionView.SetAllowsCrossThreadChanges(isSynchronized);
}
}
}
}
private ViewRecord CacheView(object collection, CollectionViewSource cvs, CollectionView cv, ViewRecord vr)
{
// create the view table, if necessary
CollectionRecord cr = this[collection];
ViewTable vt = cr.ViewTable;
if (vt == null)
{
vt = new ViewTable();
cr.ViewTable = vt;
// if the collection doesn't implement INCC, it won't hold a strong
// reference to its views. To mitigate CollecitonView sorting from being silently
// discarded, keep a
// strong reference to the ViewTable alive for at least a few
// Purge cycles. (See comment at the top of the file.)
if (!(collection is INotifyCollectionChanged))
{
_inactiveViewTables.Add(vt, InactivityThreshold);
}
}
// keep the view and the view table alive as long as any view
// (or the collection itself) is alive
if (vr == null)
{
vr = new ViewRecord(cv);
}
else if (cv == null)
{
cv = (CollectionView)vr.View;
}
cv.SetViewManagerData(vt);
// add the view to the table
vt[cvs] = vr;
return(vr);
}
// Token: 0x060076FE RID: 30462 RVA: 0x0021FFC0 File Offset: 0x0021E1C0
private ViewRecord GetExistingView(object collection, CollectionViewSource cvs, Type collectionViewType, Func <object, object> GetSourceItem)
{
CollectionView collectionView = collection as CollectionView;
ViewRecord result;
if (collectionView == null)
{
CollectionRecord collectionRecord = this.EnsureCollectionRecord(collection, GetSourceItem);
ViewTable viewTable = collectionRecord.ViewTable;
if (viewTable != null)
{
ViewRecord viewRecord = viewTable[cvs];
if (viewRecord != null)
{
collectionView = (CollectionView)viewRecord.View;
}
result = viewRecord;
if (this._inactiveViewTables.Contains(viewTable))
{
this._inactiveViewTables[viewTable] = 2;
}
}
else
{
result = null;
}
}
else
{
result = new ViewRecord(collectionView);
}
if (collectionView != null)
{
this.ValidateViewType(collectionView, collectionViewType);
}
return(result);
}
// purge the table of dead entries
internal bool Purge()
{
// decrease the expiration dates of ViewTables on the inactive
// list, and remove the ones that have expired.
int n = _inactiveViewTables.Count;
if (n > 0)
{
ViewTable[] keys = new ViewTable[n];
_inactiveViewTables.Keys.CopyTo(keys, 0);
for (int i=0; i<n; ++i)
{
ViewTable vt = keys[i];
int expirationDate = (int)_inactiveViewTables[vt];
if (--expirationDate > 0)
{
_inactiveViewTables[vt] = expirationDate;
}
else
{
_inactiveViewTables.Remove(vt);
}
}
}
// purge the table of entries whose collection has been GC'd.
ArrayList al = new ArrayList();
foreach (DictionaryEntry de in this)
{
WeakRefKey key = (WeakRefKey)de.Key;
WeakReference wr = (WeakReference)de.Value;
if (key.Target == null || !wr.IsAlive)
al.Add(key);
}
for (int k=0; k<al.Count; ++k)
{
this.Remove(al[k]);
}
return (al.Count > 0);
}
private ViewRecord CacheView(object collection, CollectionViewSource cvs, CollectionView cv, ViewRecord vr)
{
// create the view table, if necessary
ViewTable vt = this[collection];
if (vt == null)
{
vt = new ViewTable();
Add(collection, vt);
// if the collection doesn't implement INCC, it won't hold a strong
// reference to its views. To mitigate Dev10 bug 452676, keep a
// strong reference to the ViewTable alive for at least a few
// Purge cycles. (See comment at the top of the file.)
if (!(collection is INotifyCollectionChanged))
{
_inactiveViewTables.Add(vt, InactivityThreshold);
}
}
// keep the view and the view table alive as long as any view
// (or the collection itself) is alive
if (vr == null)
vr = new ViewRecord(cv);
else if (cv == null)
cv = (CollectionView)vr.View;
cv.SetViewManagerData(vt);
// add the view to the table
vt[cvs] = vr;
return vr;
}
//------------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
internal void Add(object collection, ViewTable vt)
{
base.Add(new WeakRefKey(collection), new WeakReference(vt));
}
// purge the table of dead entries
internal bool Purge()
{
// decrease the expiration dates of ViewTables on the inactive
// list, and remove the ones that have expired.
int n = _inactiveViewTables.Count;
if (n > 0)
{
ViewTable[] keys = new ViewTable[n];
_inactiveViewTables.Keys.CopyTo(keys, 0);
for (int i = 0; i < n; ++i)
{
ViewTable vt = keys[i];
int expirationDate = (int)_inactiveViewTables[vt];
if (--expirationDate > 0)
{
_inactiveViewTables[vt] = expirationDate;
}
else
{
_inactiveViewTables.Remove(vt);
}
}
}
// purge the table of entries whose collection has been GC'd.
ArrayList al = new ArrayList();
bool foundViewTableDirt = false;
foreach (DictionaryEntry de in this)
{
WeakRefKey key = (WeakRefKey)de.Key;
CollectionRecord cr = (CollectionRecord)de.Value;
if (key.Target == null || !cr.IsAlive)
{
al.Add(key);
}
else
{
// also purge ViewTable entries whose key (CVS) has been GC'd
ViewTable vt = cr.ViewTable;
if (vt != null && vt.Purge())
{
foundViewTableDirt = true;
if (vt.Count == 0)
{
// remove the ViewTable (it has no views remaining)
cr.ViewTable = null;
if (!cr.IsAlive)
{
al.Add(key);
}
}
}
}
}
for (int k = 0; k < al.Count; ++k)
{
this.Remove(al[k]);
}
return(al.Count > 0 || foundViewTableDirt);
}
// purge the table of dead entries
internal bool Purge()
{
// decrease the expiration dates of ViewTables on the inactive
// list, and remove the ones that have expired.
int n = _inactiveViewTables.Count;
if (n > 0)
{
ViewTable[] keys = new ViewTable[n];
_inactiveViewTables.Keys.CopyTo(keys, 0);
for (int i=0; i<n; ++i)
{
ViewTable vt = keys[i];
int expirationDate = (int)_inactiveViewTables[vt];
if (--expirationDate > 0)
{
_inactiveViewTables[vt] = expirationDate;
}
else
{
_inactiveViewTables.Remove(vt);
}
}
}
// purge the table of entries whose collection has been GC'd.
ArrayList al = new ArrayList();
bool foundViewTableDirt = false;
foreach (DictionaryEntry de in this)
{
WeakRefKey key = (WeakRefKey)de.Key;
CollectionRecord cr = (CollectionRecord)de.Value;
if (key.Target == null || !cr.IsAlive)
{
al.Add(key);
}
else
{
// also purge ViewTable entries whose key (CVS) has been GC'd
ViewTable vt = cr.ViewTable;
if (vt != null && vt.Purge())
{
foundViewTableDirt = true;
if (vt.Count == 0)
{
// remove the ViewTable (it has no views remaining)
cr.ViewTable = null;
if (!cr.IsAlive)
{
al.Add(key);
}
}
}
}
}
for (int k=0; k<al.Count; ++k)
{
this.Remove(al[k]);
}
return (al.Count > 0 || foundViewTableDirt);
}
