/// <summary>
/// Index in the strip before the selected item.
/// </summary>
public int StripIndexBefore(ISelectableInContentView item)
{
int index = item is Strip ?
((Strip)item).Selection is StripIndexSelection ? ((StripIndexSelection)((Strip)item).Selection).Index - 1 :
(mBlockLayout.Controls.Count - 1) / 2 :
item is Block?mBlockLayout.Controls.IndexOf((Control)item) / 2 :
item is StripCursor?mBlockLayout.Controls.IndexOf((Control)item) / 2 - 1 : -1;
return(index >= 0 ? index : 0);
}
/// <summary>
/// Return the block before the selection. In the case of a strip this is the last block.
/// Return null if this is before the first block, there are no blocks, or nothing was selected
/// in the first place.
/// </summary>
public Block BlockBefore(ISelectableInContentView item)
{
int index = item is Strip ?
((Strip)item).Selection is StripIndexSelection ? ((StripIndexSelection)((Strip)item).Selection).Index - 1 :
mBlockLayout.Controls.Count - 2 :
item is Block?mBlockLayout.Controls.IndexOf((Control)item) - 2 :
item is StripCursor?mBlockLayout.Controls.IndexOf((Control)item) - 1 : -1;
return(index >= 0 ? (Block)mBlockLayout.Controls[index] : null);
}
/// <summary>
/// Get the strip index after the given (selected) item.
/// </summary>
public int StripIndexAfter(ISelectableInContentView item)
{
int lastIndex = Node.PhraseChildCount;
int index = item is Strip ?
((Strip)item).Selection is StripIndexSelection ? ((StripIndexSelection)((Strip)item).Selection).Index + 1 : 0 :
item is Block ? (mBlockLayout.Controls.IndexOf((Control)item) + 1) / 2 :
item is StripCursor?mBlockLayout.Controls.IndexOf((Control)item) / 2 + 1 : lastIndex + 1;
return(index <= lastIndex ? index : lastIndex);
}
/// <summary>
/// Return the block after the selection. In the case of a strip it is the first block.
/// Return null if this goes past the last block, there are no blocks, or nothing was selected
/// in the first place.
/// </summary>
public Block BlockAfter(ISelectableInContentView item)
{
int count = mBlockLayout.Controls.Count;
int index = item is Strip ?
((Strip)item).Selection is StripIndexSelection ? ((StripIndexSelection)((Strip)item).Selection).Index : 1 :
item is Block?mBlockLayout.Controls.IndexOf((Control)item) + 2 :
item is StripCursor?mBlockLayout.Controls.IndexOf((Control)item) + 1 : count;
return(index < count ? (Block)mBlockLayout.Controls[index] : null);
}