/// <summary>
/// Checks if an existing block can have its replication status changed.
/// </summary>
/// <param name="inner">Inner to use to change the replication status upon return.</param>
/// <param name="blockIndex">Index of the block that can be changed upon return.</param>
/// <param name="replication">The current replication status upon return.</param>
/// <returns>True if an existing block can have its replication status changed at the focus.</returns>
public virtual bool IsReplicationModifiable(out IFocusBlockListInner inner, out int blockIndex, out ReplicationStatus replication)
{
inner = null;
blockIndex = -1;
replication = ReplicationStatus.Normal;
bool IsModifiable = false;
IFocusNodeState State = Focus.CellView.StateView.State;
// Search recursively for a collection parent, up to 3 levels up.
for (int i = 0; i < 3 && State != null; i++)
{
if (State is IFocusPatternState AsPatternState)
{
IFocusBlockState ParentBlock = AsPatternState.ParentBlockState;
IFocusBlockListInner BlockListInner = ParentBlock.ParentInner as IFocusBlockListInner;
Debug.Assert(BlockListInner != null);
inner = BlockListInner;
blockIndex = inner.BlockStateList.IndexOf(ParentBlock);
replication = ParentBlock.ChildBlock.Replication;
IsModifiable = true;
break;
}
else if (State is IFocusSourceState AsSourceState)
{
IFocusBlockState ParentBlock = AsSourceState.ParentBlockState;
IFocusBlockListInner BlockListInner = ParentBlock.ParentInner as IFocusBlockListInner;
Debug.Assert(BlockListInner != null);
inner = BlockListInner;
blockIndex = inner.BlockStateList.IndexOf(ParentBlock);
replication = ParentBlock.ChildBlock.Replication;
IsModifiable = true;
break;
}
else if (State.ParentInner is IFocusBlockListInner AsBlockListInner)
{
inner = AsBlockListInner;
IFocusBrowsingExistingBlockNodeIndex ParentIndex = State.ParentIndex as IFocusBrowsingExistingBlockNodeIndex;
Debug.Assert(ParentIndex != null);
blockIndex = ParentIndex.BlockIndex;
replication = inner.BlockStateList[blockIndex].ChildBlock.Replication;
IsModifiable = true;
break;
}
State = State.ParentState;
}
return(IsModifiable);
}
/// <summary>
/// Checks if an existing block at the focus can be moved up or down.
/// </summary>
/// <param name="direction">Direction of the move, relative to the current position of the item.</param>
/// <param name="inner">Inner to use to move the block upon return.</param>
/// <param name="blockIndex">Index of the block to move upon return.</param>
/// <returns>True if an item can be moved at the focus.</returns>
public virtual bool IsBlockMoveable(int direction, out IFocusBlockListInner inner, out int blockIndex)
{
inner = null;
blockIndex = -1;
bool IsBlockMoveable = false;
IFocusNodeState State = Focus.CellView.StateView.State;
if (Focus.CellView.Frame is IFocusInsertFrame AsInsertFrame)
{
IsBlockMoveable = false;
}
else
{
IsBlockMoveable = false;
// Search recursively for a collection parent, up to 3 levels up.
for (int i = 0; i < 3 && State != null; i++)
{
if (State.ParentInner is IFocusBlockListInner AsBlockListInner)
{
inner = AsBlockListInner;
IFocusBrowsingExistingBlockNodeIndex ParentIndex = State.ParentIndex as IFocusBrowsingExistingBlockNodeIndex;
Debug.Assert(ParentIndex != null);
blockIndex = ParentIndex.BlockIndex;
if (Controller.IsBlockMoveable(inner, blockIndex, direction))
{
IsBlockMoveable = true;
}
break;
}
State = State.ParentState;
}
}
return(IsBlockMoveable);
}
