/// <summary>
/// Vráti hranice grupy.
/// Ukazuje na začiatočný znak grupy ( { [.
/// //TODO: otestovať!!!!
/// </summary>
/// <param name="parser"></param>
/// <param name="openElem"></param>
/// <param name="closeElem"></param>
/// <param name="dir"></param>
/// <param name="tree"></param>
/// <param name="vis"></param>
/// <param name="startIndex"></param>
/// <param name="length"></param>
public void GetGroupCorners(TokenType openElem, TokenType closeElem,
SearchVisibility vis, out int startIndex, out int length)
{
MoveInfo oldMoveInfo = new MoveInfo(this);
IElement start = Find(SearchDirection.LeftToRight, vis, a => a.IsTT(openElem));
if (start == null)
{
throw new SyntaxException("Could not find start of block '" + openElem.ToString() + "'", oldMoveInfo.GetErrorInfo());
}
MoveInfo startMoveInfo = new MoveInfo(this);
int level = 0;
startIndex = CurrentIndex;
IElement cur = Current;
do
{
if (cur == null)
{
throw new SyntaxException("Could not find end of block '" + closeElem.ToString() + "'", oldMoveInfo.GetErrorInfo());
}
if (CheckVisible(cur, vis))
{
if (cur.IsTT(openElem))
{
level++;
}
else if (cur.IsTT(closeElem))
{
level--;
}
}
if (level != 0)
{
cur = Move(SearchDirection.LeftToRight);
}
}while (level != 0);
length = (CurrentIndex + 1) - startIndex;
Restore(startMoveInfo);
}
/// <summary>
/// Nájde nasledujúci elem vyhovujúci všetkým podmienkam.
/// Do hľadania zahrnuje aj Current elem!
/// Ukazuje na tento elem.
/// </summary>
/// <param name="dir"></param>
/// <param name="tree"></param>
/// <param name="vis"></param>
/// <param name="predicate"></param>
/// <returns></returns>
public IElement Find(SearchDirection dir, SearchVisibility vis, Predicate <IElement> predicate)
{
IElement cur = Current;
while (true)
{
if (cur == null)
{
break;
}
if (!CheckVisible(cur, vis) ||
(predicate != null && !predicate.Invoke(cur)))
{
cur = Move(dir);
}
else
{
break;
}
}
return(cur);
}
/// <summary>
/// Nájde nasledujúci elem vyhovujúci všetkým podmienkam.
/// Ukazuje na tento elem.
/// </summary>
/// <param name="dir"></param>
/// <param name="tree"></param>
/// <param name="vis"></param>
/// <returns></returns>
public IElement Find(SearchDirection dir, SearchVisibility vis)
{
return(Find(dir, vis, null));
}
/// <summary>
/// Zkontroluje, či viditeľnosť elemu zodpovedá zadaným kritériám.
/// </summary>
/// <param name="elem"></param>
/// <param name="vis"></param>
/// <returns></returns>
private static bool CheckVisible(IElement elem, SearchVisibility vis)
{
return(!((vis == SearchVisibility.Unvisible && elem.Visible) ||
(vis == SearchVisibility.Visible && !elem.Visible)));
}
