/// <summary>
/// Handler called every time a state is removed from the controller.
/// </summary>
/// <param name="operation">Details of the operation performed.</param>
private protected virtual void OnStateRemoved(WriteableRemoveNodeOperation operation)
{
IWriteablePlaceholderNodeState RemovedState = operation.RemovedState;
Debug.Assert(RemovedState != null);
Debug.Assert(!StateViewTable.ContainsKey(RemovedState));
}
private protected virtual void UndoInsertNewNode(IWriteableOperation operation)
{
WriteableInsertNodeOperation InsertNodeOperation = (WriteableInsertNodeOperation)operation;
WriteableRemoveNodeOperation RemoveNodeOperation = InsertNodeOperation.ToRemoveNodeOperation();
ExecuteRemoveNode(RemoveNodeOperation);
}
/// <summary>
/// Removes a node from a list or block list.
/// </summary>
/// <param name="operation">Details of the operation performed.</param>
public virtual void Remove(WriteableRemoveNodeOperation operation)
{
int RemoveIndex = operation.Index;
Debug.Assert(RemoveIndex >= 0 && RemoveIndex < StateList.Count);
IWriteablePlaceholderNodeState OldChildState = (IWriteablePlaceholderNodeState)StateList[RemoveIndex];
RemoveFromStateList(RemoveIndex);
Node ParentNode = Owner.Node;
NodeTreeHelperList.RemoveFromList(ParentNode, PropertyName, RemoveIndex);
while (RemoveIndex < StateList.Count)
{
IWriteablePlaceholderNodeState State = (IWriteablePlaceholderNodeState)StateList[RemoveIndex];
IWriteableBrowsingListNodeIndex NodeIndex = State.ParentIndex as IWriteableBrowsingListNodeIndex;
Debug.Assert(NodeIndex != null);
Debug.Assert(NodeIndex.Index == RemoveIndex + 1);
NodeIndex.MoveDown();
RemoveIndex++;
}
operation.Update(OldChildState);
}
/// <summary></summary>
public virtual void RemoveNodeRange(IWriteableListInner inner, int firstNodeIndex, int lastNodeIndex)
{
Contract.RequireNotNull(inner, out IWriteableListInner Inner);
Debug.Assert(firstNodeIndex >= 0 && firstNodeIndex < Inner.StateList.Count);
Debug.Assert(lastNodeIndex >= 0 && lastNodeIndex <= Inner.StateList.Count);
Debug.Assert(firstNodeIndex <= lastNodeIndex);
System.Action <IWriteableOperation> HandlerRedoNode = (IWriteableOperation operation) => RedoRemoveNode(operation);
System.Action <IWriteableOperation> HandlerUndoNode = (IWriteableOperation operation) => UndoRemoveNode(operation);
WriteableOperationList OperationList = CreateOperationList();
for (int i = firstNodeIndex; i < lastNodeIndex; i++)
{
WriteableRemoveNodeOperation OperationNode = CreateRemoveNodeOperation(Inner.Owner.Node, Inner.PropertyName, -1, firstNodeIndex, HandlerRedoNode, HandlerUndoNode, isNested: true);
OperationList.Add(OperationNode);
}
if (OperationList.Count > 0)
{
WriteableOperationReadOnlyList OperationReadOnlyList = OperationList.ToReadOnly();
System.Action <IWriteableOperation> HandlerRedo = (IWriteableOperation operation) => RedoRefresh(operation);
System.Action <IWriteableOperation> HandlerUndo = (IWriteableOperation operation) => throw new NotImplementedException(); // Undo is not possible.
WriteableGenericRefreshOperation RefreshOperation = CreateGenericRefreshOperation(RootState, HandlerRedo, HandlerUndo, isNested: false);
WriteableOperationGroup OperationGroup = CreateOperationGroup(OperationReadOnlyList, RefreshOperation);
OperationGroup.Redo();
SetLastOperation(OperationGroup);
CheckInvariant();
}
}
private protected virtual void RemoveNode(IWriteableCollectionInner <IWriteableBrowsingCollectionNodeIndex> inner, int blockIndex, int index)
{
System.Action <IWriteableOperation> HandlerRedo = (IWriteableOperation operation) => RedoRemoveNode(operation);
System.Action <IWriteableOperation> HandlerUndo = (IWriteableOperation operation) => UndoRemoveNode(operation);
WriteableRemoveNodeOperation Operation = CreateRemoveNodeOperation(inner.Owner.Node, inner.PropertyName, blockIndex, index, HandlerRedo, HandlerUndo, isNested: false);
Operation.Redo();
SetLastOperation(Operation);
CheckInvariant();
}
private protected virtual void ExecuteRemoveNode(WriteableRemoveNodeOperation operation)
{
Node ParentNode = operation.ParentNode;
string PropertyName = operation.PropertyName;
IWriteableCollectionInner <IWriteableBrowsingCollectionNodeIndex> Inner = GetInner(ParentNode, PropertyName) as IWriteableCollectionInner <IWriteableBrowsingCollectionNodeIndex>;
Inner.Remove(operation);
IWriteableNodeState RemovedState = operation.RemovedState;
PruneState(RemovedState);
Stats.PlaceholderNodeCount--;
NotifyStateRemoved(operation);
}
/// <summary>
/// Removes a range of blocks from a block list.
/// </summary>
/// <param name="inner">The inner for the block list from which blocks are removed.</param>
/// <param name="firstBlockIndex">Index of the first block to remove.</param>
/// <param name="lastBlockIndex">Index following the last block to remove.</param>
public virtual void RemoveBlockRange(IWriteableBlockListInner inner, int firstBlockIndex, int lastBlockIndex)
{
Contract.RequireNotNull(inner, out IWriteableBlockListInner Inner);
Debug.Assert(firstBlockIndex >= 0 && firstBlockIndex < Inner.BlockStateList.Count);
Debug.Assert(lastBlockIndex >= 0 && lastBlockIndex <= Inner.BlockStateList.Count);
Debug.Assert(firstBlockIndex <= lastBlockIndex);
System.Action <IWriteableOperation> HandlerRedoNode = (IWriteableOperation operation) => RedoRemoveNode(operation);
System.Action <IWriteableOperation> HandlerUndoNode = (IWriteableOperation operation) => UndoRemoveNode(operation);
System.Action <IWriteableOperation> HandlerRedoBlock = (IWriteableOperation operation) => RedoRemoveBlock(operation);
System.Action <IWriteableOperation> HandlerUndoBlock = (IWriteableOperation operation) => UndoRemoveBlock(operation);
WriteableOperationList OperationList = CreateOperationList();
for (int i = firstBlockIndex; i < lastBlockIndex; i++)
{
IWriteableBlockState BlockState = (IWriteableBlockState)Inner.BlockStateList[i];
Debug.Assert(BlockState.StateList.Count >= 1);
// Remove at firstBlockIndex since subsequent blocks are moved as the block at firstBlockIndex is deleted.
// Same for nodes inside blokcks, delete them at 0.
for (int j = 1; j < BlockState.StateList.Count; j++)
{
WriteableRemoveNodeOperation OperationNode = CreateRemoveNodeOperation(Inner.Owner.Node, Inner.PropertyName, firstBlockIndex, 0, HandlerRedoNode, HandlerUndoNode, isNested: true);
OperationList.Add(OperationNode);
}
IWriteableRemoveBlockOperation OperationBlock = CreateRemoveBlockOperation(Inner.Owner.Node, Inner.PropertyName, firstBlockIndex, HandlerRedoBlock, HandlerUndoBlock, isNested: true);
OperationList.Add(OperationBlock);
}
if (OperationList.Count > 0)
{
WriteableOperationReadOnlyList OperationReadOnlyList = OperationList.ToReadOnly();
System.Action <IWriteableOperation> HandlerRedo = (IWriteableOperation operation) => RedoRefresh(operation);
System.Action <IWriteableOperation> HandlerUndo = (IWriteableOperation operation) => throw new NotImplementedException(); // Undo is not possible.
WriteableGenericRefreshOperation RefreshOperation = CreateGenericRefreshOperation(RootState, HandlerRedo, HandlerUndo, isNested: false);
WriteableOperationGroup OperationGroup = CreateOperationGroup(OperationReadOnlyList, RefreshOperation);
OperationGroup.Redo();
SetLastOperation(OperationGroup);
CheckInvariant();
}
}
/// <summary> /// Removes a node from a list or block list. /// </summary> /// <param name="operation">Details of the operation performed.</param> public abstract void Remove(WriteableRemoveNodeOperation operation);
/// <summary></summary>
public virtual void ReplaceNodeRange(IWriteableListInner inner, int firstNodeIndex, int lastNodeIndex, IList <IWriteableInsertionCollectionNodeIndex> indexList)
{
Contract.RequireNotNull(inner, out IWriteableListInner Inner);
Debug.Assert(firstNodeIndex >= 0 && firstNodeIndex < Inner.StateList.Count);
Debug.Assert(lastNodeIndex >= 0 && lastNodeIndex <= Inner.StateList.Count);
Debug.Assert(firstNodeIndex <= lastNodeIndex);
int BlockNodeIndex = firstNodeIndex;
foreach (IWriteableInsertionCollectionNodeIndex NodeIndex in indexList)
{
bool IsHandled = false;
if (NodeIndex is IWriteableInsertionListNodeIndex AsListNodeIndex)
{
Debug.Assert(AsListNodeIndex.Index == BlockNodeIndex);
BlockNodeIndex++;
IsHandled = true;
}
Debug.Assert(IsHandled);
}
int FinalNodeIndex = BlockNodeIndex;
Action <IWriteableOperation> HandlerRedoInsertNode = (IWriteableOperation operation) => RedoInsertNewNode(operation);
Action <IWriteableOperation> HandlerUndoInsertNode = (IWriteableOperation operation) => UndoInsertNewNode(operation);
Action <IWriteableOperation> HandlerRedoRemoveNode = (IWriteableOperation operation) => RedoRemoveNode(operation);
Action <IWriteableOperation> HandlerUndoRemoveNode = (IWriteableOperation operation) => UndoRemoveNode(operation);
WriteableOperationList OperationList = CreateOperationList();
// Insert first to prevent empty block lists.
foreach (IWriteableInsertionCollectionNodeIndex NodeIndex in indexList)
{
if (NodeIndex is IWriteableInsertionListNodeIndex AsListNodeIndex)
{
IndexToPositionAndNode(AsListNodeIndex, out int BlockIndex, out int Index, out _, out Node Node);
WriteableInsertNodeOperation OperationInsertNode = CreateInsertNodeOperation(Inner.Owner.Node, Inner.PropertyName, BlockIndex, Index, Node, HandlerRedoInsertNode, HandlerUndoInsertNode, isNested: true);
OperationList.Add(OperationInsertNode);
}
}
for (int i = FinalNodeIndex; i < FinalNodeIndex + lastNodeIndex - firstNodeIndex; i++)
{
WriteableRemoveNodeOperation OperationNode = CreateRemoveNodeOperation(Inner.Owner.Node, Inner.PropertyName, -1, FinalNodeIndex, HandlerRedoRemoveNode, HandlerUndoRemoveNode, isNested: true);
OperationList.Add(OperationNode);
}
if (OperationList.Count > 0)
{
WriteableOperationReadOnlyList OperationReadOnlyList = OperationList.ToReadOnly();
Action <IWriteableOperation> HandlerRedo = (IWriteableOperation operation) => RedoRefresh(operation);
Action <IWriteableOperation> HandlerUndo = (IWriteableOperation operation) => throw new NotImplementedException(); // Undo is not possible.
WriteableGenericRefreshOperation RefreshOperation = CreateGenericRefreshOperation(RootState, HandlerRedo, HandlerUndo, isNested: false);
WriteableOperationGroup OperationGroup = CreateOperationGroup(OperationReadOnlyList, RefreshOperation);
OperationGroup.Redo();
SetLastOperation(OperationGroup);
CheckInvariant();
}
}
/// <summary>
/// Removes a range of blocks from a block list and replace them with other blocks.
/// </summary>
/// <param name="inner">The inner for the block list from which blocks are replaced.</param>
/// <param name="firstBlockIndex">Index of the first block to remove.</param>
/// <param name="lastBlockIndex">Index following the last block to remove.</param>
/// <param name="indexList">List of nodes in blocks to insert.</param>
public virtual void ReplaceBlockRange(IWriteableBlockListInner inner, int firstBlockIndex, int lastBlockIndex, IList <IWriteableInsertionBlockNodeIndex> indexList)
{
Contract.RequireNotNull(inner, out IWriteableBlockListInner Inner);
Debug.Assert(firstBlockIndex >= 0 && firstBlockIndex < Inner.BlockStateList.Count);
Debug.Assert(lastBlockIndex >= 0 && lastBlockIndex <= Inner.BlockStateList.Count);
Debug.Assert(firstBlockIndex <= lastBlockIndex);
Contract.RequireNotNull(indexList, out IList <IWriteableInsertionBlockNodeIndex> IndexList);
int BlockIndex = firstBlockIndex - 1;
int BlockNodeIndex = 0;
foreach (IWriteableInsertionBlockNodeIndex NodeIndex in IndexList)
{
bool IsHandled = false;
if (NodeIndex is IWriteableInsertionNewBlockNodeIndex AsNewBlockNodeIndex)
{
BlockIndex++;
BlockNodeIndex = 0;
Debug.Assert(AsNewBlockNodeIndex.BlockIndex == BlockIndex);
IsHandled = true;
}
else if (NodeIndex is IWriteableInsertionExistingBlockNodeIndex AsExistingBlockNodeIndex)
{
BlockNodeIndex++;
Debug.Assert(AsExistingBlockNodeIndex.BlockIndex == BlockIndex);
Debug.Assert(AsExistingBlockNodeIndex.Index == BlockNodeIndex);
IsHandled = true;
}
Debug.Assert(IsHandled);
}
int FinalBlockIndex = BlockIndex + 1;
Action <IWriteableOperation> HandlerRedoInsertNode = (IWriteableOperation operation) => RedoInsertNewNode(operation);
Action <IWriteableOperation> HandlerUndoInsertNode = (IWriteableOperation operation) => UndoInsertNewNode(operation);
Action <IWriteableOperation> HandlerRedoInsertBlock = (IWriteableOperation operation) => RedoInsertNewBlock(operation);
Action <IWriteableOperation> HandlerUndoInsertBlock = (IWriteableOperation operation) => UndoInsertNewBlock(operation);
Action <IWriteableOperation> HandlerRedoRemoveNode = (IWriteableOperation operation) => RedoRemoveNode(operation);
Action <IWriteableOperation> HandlerUndoRemoveNode = (IWriteableOperation operation) => UndoRemoveNode(operation);
Action <IWriteableOperation> HandlerRedoRemoveBlock = (IWriteableOperation operation) => RedoRemoveBlock(operation);
Action <IWriteableOperation> HandlerUndoRemoveBlock = (IWriteableOperation operation) => UndoRemoveBlock(operation);
WriteableOperationList OperationList = CreateOperationList();
// Insert first to prevent empty block lists.
foreach (IWriteableInsertionBlockNodeIndex NodeIndex in IndexList)
{
if (NodeIndex is IWriteableInsertionNewBlockNodeIndex AsNewBlockNodeIndex)
{
IBlock NewBlock = NodeTreeHelperBlockList.CreateBlock(Inner.Owner.Node, Inner.PropertyName, ReplicationStatus.Normal, AsNewBlockNodeIndex.PatternNode, AsNewBlockNodeIndex.SourceNode);
IWriteableInsertBlockOperation OperationInsertBlock = CreateInsertBlockOperation(Inner.Owner.Node, Inner.PropertyName, AsNewBlockNodeIndex.BlockIndex, NewBlock, AsNewBlockNodeIndex.Node, HandlerRedoInsertBlock, HandlerUndoInsertBlock, isNested: true);
OperationList.Add(OperationInsertBlock);
}
else if (NodeIndex is IWriteableInsertionExistingBlockNodeIndex AsExistingBlockNodeIndex)
{
IndexToPositionAndNode(AsExistingBlockNodeIndex, out BlockIndex, out int Index, out _, out Node Node);
WriteableInsertNodeOperation OperationInsertNode = CreateInsertNodeOperation(Inner.Owner.Node, Inner.PropertyName, BlockIndex, Index, Node, HandlerRedoInsertNode, HandlerUndoInsertNode, isNested: true);
OperationList.Add(OperationInsertNode);
}
}
Debug.Assert(BlockIndex + 1 == FinalBlockIndex);
for (int i = FinalBlockIndex; i < FinalBlockIndex + lastBlockIndex - firstBlockIndex; i++)
{
IWriteableBlockState BlockState = (IWriteableBlockState)Inner.BlockStateList[i + firstBlockIndex - FinalBlockIndex];
Debug.Assert(BlockState.StateList.Count >= 1);
// Remove at FinalBlockIndex since subsequent blocks are moved as the block at FinalBlockIndex is deleted.
// Same for nodes inside blokcks, delete them at 0.
for (int j = 1; j < BlockState.StateList.Count; j++)
{
WriteableRemoveNodeOperation OperationNode = CreateRemoveNodeOperation(Inner.Owner.Node, Inner.PropertyName, FinalBlockIndex, 0, HandlerRedoRemoveNode, HandlerUndoRemoveNode, isNested: true);
OperationList.Add(OperationNode);
}
IWriteableRemoveBlockOperation OperationBlock = CreateRemoveBlockOperation(Inner.Owner.Node, Inner.PropertyName, FinalBlockIndex, HandlerRedoRemoveBlock, HandlerUndoRemoveBlock, isNested: true);
OperationList.Add(OperationBlock);
}
if (OperationList.Count > 0)
{
WriteableOperationReadOnlyList OperationReadOnlyList = OperationList.ToReadOnly();
Action <IWriteableOperation> HandlerRedo = (IWriteableOperation operation) => RedoRefresh(operation);
Action <IWriteableOperation> HandlerUndo = (IWriteableOperation operation) => throw new NotImplementedException(); // Undo is not possible.
WriteableGenericRefreshOperation RefreshOperation = CreateGenericRefreshOperation(RootState, HandlerRedo, HandlerUndo, isNested: false);
WriteableOperationGroup OperationGroup = CreateOperationGroup(OperationReadOnlyList, RefreshOperation);
OperationGroup.Redo();
SetLastOperation(OperationGroup);
CheckInvariant();
}
}
private protected virtual void NotifyStateRemoved(WriteableRemoveNodeOperation operation)
{
StateRemovedHandler?.Invoke(operation);
}
private protected virtual void Remove(IWriteableRemoveBlockOperation blockOperation, WriteableRemoveNodeOperation nodeOperation, int blockIndex, int index)
{
Debug.Assert(blockIndex >= 0 && blockIndex < BlockStateList.Count);
IWriteableBlockState BlockState = (IWriteableBlockState)BlockStateList[blockIndex];
Debug.Assert(index >= 0 && index < BlockState.StateList.Count);
IBlock ChildBlock = BlockState.ChildBlock;
Node ParentNode = Owner.Node;
int i;
IWriteablePlaceholderNodeState OldChildState = (IWriteablePlaceholderNodeState)BlockState.StateList[index];
Node RemovedNode = OldChildState.Node;
BlockState.Remove((IWriteableBrowsingBlockNodeIndex)OldChildState.ParentIndex, index);
NodeTreeHelperBlockList.RemoveFromBlock(ParentNode, PropertyName, blockIndex, index, out bool IsBlockRemoved);
if (IsBlockRemoved)
{
Debug.Assert(blockOperation != null);
RemoveFromBlockStateList(blockIndex);
blockOperation.Update(BlockState, OldChildState);
for (i = blockIndex; i < BlockStateList.Count; i++)
{
IWriteableBlockState NextBlockState = (IWriteableBlockState)BlockStateList[i];
foreach (IWriteablePlaceholderNodeState State in NextBlockState.StateList)
{
IWriteableBrowsingExistingBlockNodeIndex NodeIndex = State.ParentIndex as IWriteableBrowsingExistingBlockNodeIndex;
Debug.Assert(NodeIndex != null);
Debug.Assert(NodeIndex.BlockIndex == i + 1);
NodeIndex.MoveBlockDown();
}
}
}
else
{
Debug.Assert(nodeOperation != null);
nodeOperation.Update(OldChildState);
}
i = index;
while (i < BlockState.StateList.Count)
{
IWriteablePlaceholderNodeState State = (IWriteablePlaceholderNodeState)BlockState.StateList[i];
IWriteableBrowsingExistingBlockNodeIndex NodeIndex = State.ParentIndex as IWriteableBrowsingExistingBlockNodeIndex;
Debug.Assert(NodeIndex != null);
Debug.Assert(NodeIndex.BlockIndex == blockIndex);
Debug.Assert(NodeIndex.Index == i + 1);
NodeIndex.MoveDown();
i++;
}
}
/// <summary>
/// Removes a node from a block list. This method is not allowed to remove the last node of a block.
/// </summary>
/// <param name="operation">Details of the operation performed.</param>
public virtual void Remove(WriteableRemoveNodeOperation operation)
{
// Only the safe case where the block isn't removed is allowed for this version of Remove().
Remove(null, operation, operation.BlockIndex, operation.Index);
}
private protected virtual void RedoRemoveNode(IWriteableOperation operation)
{
WriteableRemoveNodeOperation RemoveNodeOperation = (WriteableRemoveNodeOperation)operation;
ExecuteRemoveNode(RemoveNodeOperation);
}
