internal override void RemoveRawItemAt(int index)
{
Debug.Assert(this.IsBottomLevel);
Debug.Assert(m_sortedRawItems.Count > 0);
int count = m_sortedRawItems.Count;
if (count == 0)
{
return;
}
if (index != -1)
{
m_globalRawItemCount--;
for (int i = index + 1; i < count; i++)
{
m_sortedRawItems[i].SetSortedIndex(i - 1);
}
RawItem rawItem = m_sortedRawItems[index];
rawItem.SetParentGroup(null);
rawItem.SetSortedIndex(-1);
m_sortedRawItems.RemoveAt(index);
}
}
internal void SortRootRawItems(SortDescriptionInfo[] sortDescriptionInfos, List <RawItem> globalRawItems)
{
Debug.Assert(this.IsBottomLevel);
int itemCount = m_sortedRawItems.Count;
if (itemCount == 0)
{
return;
}
int[] indexes;
indexes = new int[itemCount + 1];
for (int i = 0; i < itemCount; i++)
{
indexes[i] = m_sortedRawItems[i].Index;
}
// "Weak heap sort" sort array[0..NUM_ELEMENTS-1] to array[1..NUM_ELEMENTS]
DataGridCollectionViewSort collectionViewSort = new DataGridCollectionViewSort(indexes, sortDescriptionInfos);
collectionViewSort.Sort(itemCount);
int index = 0;
for (int i = 1; i <= itemCount; i++)
{
RawItem newRawItem = globalRawItems[indexes[i]];
newRawItem.SetSortedIndex(index);
m_sortedRawItems[index] = newRawItem;
index++;
}
}
internal int BinarySearchRawItem(RawItem value, IComparer <RawItem> comparer)
{
if (comparer == null)
{
throw new ArgumentNullException("comparer");
}
if (m_sortedRawItems == null)
{
return(-1); // ~0
}
Debug.Assert((m_sortedRawItems.Count == this.ProtectedItemCount) || (this is DataGridCollectionViewGroupRoot));
int low = 0;
int hi = (m_sortedRawItems.Count) - 1;
while (low <= hi)
{
int compareResult;
int median = (low + ((hi - low) >> 1));
RawItem medianRawItem = m_sortedRawItems[median];
// We exclude ourself from the research because we seek for a new valid position
if (medianRawItem == value)
{
if (low == hi)
{
return(low);
}
median++;
medianRawItem = m_sortedRawItems[median];
}
try
{
compareResult = comparer.Compare(medianRawItem, value);
}
catch (Exception exception)
{
throw new InvalidOperationException("IComparer has failed to compare the values.", exception);
}
if (compareResult == 0)
{
return(median);
}
if (compareResult < 0)
{
low = median + 1;
}
else
{
hi = median - 1;
}
}
return(~low);
}
internal void Add(object dataItem, RawItem rawItem)
{
Debug.Assert(dataItem != null);
Debug.Assert(rawItem != null);
Debug.Assert(dataItem == rawItem.DataItem);
RawItem single;
RawItem[] multiple;
if (m_singleMap.TryGetValue(dataItem, out single))
{
Debug.Assert(rawItem != single, "It's not normal to be called twice for the same RawItem.");
m_multiMap.Add(dataItem, new RawItem[] { single, rawItem });
m_singleMap.Remove(dataItem);
}
else if (m_multiMap.TryGetValue(dataItem, out multiple))
{
Debug.Assert(!multiple.Contains(rawItem), "It's not normal to be called twice for the same RawItem.");
var length = multiple.Length;
Array.Resize <RawItem>(ref multiple, length + 1);
multiple[length] = rawItem;
m_multiMap[dataItem] = multiple;
}
else
{
m_singleMap.Add(dataItem, rawItem);
}
}
internal virtual void InsertRawItem(int index, RawItem rawItem)
{
Debug.Assert(this.IsBottomLevel);
m_globalRawItemCount++;
DataGridCollectionViewGroup parent = m_parent;
while (parent != null)
{
parent.m_globalRawItemCount++;
parent = parent.m_parent;
}
int count = m_sortedRawItems.Count;
for (int i = index; i < count; i++)
{
m_sortedRawItems[i].SetSortedIndex(i + 1);
}
m_sortedRawItems.Insert(index, rawItem);
rawItem.SetParentGroup(this);
rawItem.SetSortedIndex(index);
this.ProtectedItemCount++;
this.ProtectedItems.Insert(index, rawItem.DataItem);
}
internal virtual void MoveRawItem(int oldIndex, int newIndex)
{
Debug.Assert(this.IsBottomLevel);
Debug.Assert(m_sortedRawItems != null);
if (m_sortedRawItems == null)
{
return;
}
RawItem rawItem = m_sortedRawItems[oldIndex];
m_sortedRawItems.RemoveAt(oldIndex);
m_sortedRawItems.Insert(newIndex, rawItem);
int startIndex = System.Math.Min(oldIndex, newIndex);
int endIndex = System.Math.Max(oldIndex, newIndex);
for (int i = startIndex; i <= endIndex; i++)
{
m_sortedRawItems[i].SetSortedIndex(i);
}
this.ProtectedItems.Move(oldIndex, newIndex);
}
internal bool Contains(object item)
{
var group = item as DataGridCollectionViewGroup;
if (group != null)
{
//Must make sure the group the group is ref equals, because there can be groups with a null name at more than one level.
DataGridCollectionViewGroup foundGroup;
if (m_subGroups.TryGetValue(DataGridCollectionViewGroup.GetHashKeyFromName(group.Name), out foundGroup))
{
return(foundGroup == group);
}
return(false);
}
DataGridCollectionView collectionView = this.GetCollectionView();
if (collectionView != null)
{
RawItem rawItem = collectionView.GetFirstRawItemFromDataItem(item);
if (rawItem != null)
{
return(rawItem.ParentGroup == this);
}
}
return(false);
}
internal void Remove(object dataItem, RawItem rawItem)
{
Debug.Assert(dataItem != null);
Debug.Assert(rawItem != null);
Debug.Assert(dataItem == rawItem.DataItem);
if (m_singleMap.Remove(dataItem))
{
return;
}
RawItem[] multiple;
if (!m_multiMap.TryGetValue(dataItem, out multiple))
{
return;
}
var length = multiple.Length;
if (length == 2)
{
if (multiple[0] == rawItem)
{
m_singleMap.Add(dataItem, multiple[1]);
m_multiMap.Remove(dataItem);
}
else if (multiple[1] == rawItem)
{
m_singleMap.Add(dataItem, multiple[0]);
m_multiMap.Remove(dataItem);
}
}
else
{
Debug.Assert(length > 2);
var index = Array.IndexOf(multiple, rawItem);
if (index < 0)
{
return;
}
RawItem[] copy = new RawItem[length - 1];
if (index > 0)
{
Array.Copy(multiple, 0, copy, 0, index);
}
if (index < length - 1)
{
Array.Copy(multiple, index + 1, copy, index, length - index - 1);
}
m_multiMap[dataItem] = copy;
}
}
internal int RawItemIndexOf(RawItem rawItem)
{
Debug.Assert(m_sortedRawItems != null);
if (m_sortedRawItems == null)
{
return(-1);
}
return(m_sortedRawItems.IndexOf(rawItem));
}
internal override void InsertRawItem(int index, RawItem rawItem)
{
Debug.Assert(this.IsBottomLevel);
m_globalRawItemCount++;
int count = m_sortedRawItems.Count;
for (int i = index; i < count; i++)
{
m_sortedRawItems[i].SetSortedIndex(i + 1);
}
m_sortedRawItems.Insert(index, rawItem);
rawItem.SetParentGroup(this);
rawItem.SetSortedIndex(index);
}
internal override void MoveRawItem(int oldIndex, int newIndex)
{
Debug.Assert(this.IsBottomLevel);
RawItem rawItem = m_sortedRawItems[oldIndex];
m_sortedRawItems.RemoveAt(oldIndex);
m_sortedRawItems.Insert(newIndex, rawItem);
int startIndex = System.Math.Min(oldIndex, newIndex);
int endIndex = System.Math.Max(oldIndex, newIndex);
for (int i = startIndex; i <= endIndex; i++)
{
m_sortedRawItems[i].SetSortedIndex(i);
}
}
internal DataGridCollectionViewGroup GetGroup(
RawItem rawItem,
int level,
CultureInfo culture,
ObservableCollection <GroupDescription> groupByList,
List <GroupSortComparer> groupSortComparers)
{
// If sortComparers is null, we are in massive group creation, no order check.
if (this.IsBottomLevel)
{
throw new InvalidOperationException("An attempt was made to get a group for which a GroupDescription has not been provided.");
}
object groupName = m_subGroupBy.GroupNameFromItem(rawItem.DataItem, level, culture);
DataGridCollectionViewGroup group;
if ((m_subGroupBy is DataGridGroupDescription) || (m_subGroupBy is PropertyGroupDescription))
{
m_subGroups.TryGetValue(DataGridCollectionViewGroup.GetHashKeyFromName(groupName), out group);
}
else
{
//If dealing with an unknown GroupDescription type, use the standard method to retrieve a group, in case group retrival is handle differently.
group = null;
foreach (var tempGroup in m_subGroups.Values)
{
if (m_subGroupBy.NamesMatch(tempGroup.Name, groupName))
{
group = tempGroup;
break;
}
}
}
if (group == null)
{
group = this.CreateSubGroup(groupName, level, groupByList, groupSortComparers);
}
return(group);
}
internal virtual void RemoveRawItemAt(int index)
{
Debug.Assert(this.IsBottomLevel);
Debug.Assert(m_sortedRawItems.Count > 0);
int count = m_sortedRawItems.Count;
if (count == 0)
{
return;
}
if (index != -1)
{
m_globalRawItemCount--;
DataGridCollectionViewGroup parent = m_parent;
while (parent != null)
{
parent.m_globalRawItemCount--;
parent = parent.Parent;
}
for (int i = index + 1; i < count; i++)
{
m_sortedRawItems[i].SetSortedIndex(i - 1);
}
RawItem rawItem = m_sortedRawItems[index];
rawItem.SetParentGroup(null);
rawItem.SetSortedIndex(-1);
m_sortedRawItems.RemoveAt(index);
this.ProtectedItemCount--;
this.ProtectedItems.RemoveAt(index);
if ((this.ProtectedItemCount == 0) && (m_parent != null))
{
m_parent.RemoveGroup(this);
}
}
}
internal int IndexOf(object item)
{
if (item is DataGridCollectionViewGroup)
{
return(this.ProtectedItems.IndexOf(item));
}
DataGridCollectionView collectionView = this.GetCollectionView();
if (collectionView != null)
{
RawItem rawItem = collectionView.GetFirstRawItemFromDataItem(item);
if ((rawItem != null) && (rawItem.ParentGroup == this))
{
return(rawItem.SortedIndex);
}
}
return(-1);
}
