private static OoAccComponent moveToChildComponent(OoAccComponent comp, ref int index)
{
if (comp != null && comp.IsValid() && comp.HasChildren)
{
try
{
int childNumber = comp.ChildCount;
index = index % childNumber;
return comp.GetChild(index);
}
catch { }
}
return null;
}
/// <summary>
/// Moves to prev component.
/// </summary>
/// <param name="comp">The comp.</param>
/// <param name="handleChildren">if set to <c>true</c> [handle children].</param>
/// <returns></returns>
private static OoAccComponent moveDeterministicToPrevComponent(OoAccComponent comp, bool handleChildren = true)
{
if (comp != null)
{
//walk through the children and back to the parent
//check if has children
if (handleChildren && comp.HasChildren) // should have children --> go deeper
{
//TODO: check if we accept this children - e.g. Text ???
// try get the first child
OoAccComponent child = comp.GetChild(comp.ChildCount - 1);
if (child != null)
{
System.Diagnostics.Debug.WriteLine("[MOVE PREV] ---> return child: " + child);
return child;
}
}
// if has no children --> go to prev sibling
//--------------------------
// try to get the parent
OoAccComponent parent = comp.GetParent();
if (parent != null)
{
int pIndex = comp.IndexInParent;
if (pIndex >= 0)
{
int pcCount = parent.ChildCount;
if (pIndex > 0) // is not the first child
{
// get prev sibling
var prevSibling = parent.GetChild(pIndex - 1);
if (prevSibling != null)
{
System.Diagnostics.Debug.WriteLine("[MOVE PREV] ---> return prev sibling: " + prevSibling);
return prevSibling;
}
}
else // is first element --> go higher
{
return moveDeterministicToPrevComponent(parent, false);
}
}
else
{
// ERROR - this happens e.g. when the parent object is invalid
AudioRenderer.Instance.PlayWaveImmediately(StandardSounds.Error);
Logger.Instance.Log(LogPriority.OFTEN, "AccDomWalker", "[ERROR] Index in parent is negative");
}
}
}
return null;
}