/// <summary>
/// Get the object that was inserted under the keyword.
/// </summary>
/// <value>The object that was inserted under the keyword.</value>
/// <remarks>
/// <para>
/// The keyword is taken from an <see cref="IDocument"/> at a given location
/// (line, offset in line, length).
/// </para>
/// <para>
/// Returns <c>null</c>, if no such keyword exists.
/// </para>
/// </remarks>
public object this[IDocument document, LineSegment line, int offsetInLine, int lengthOfWord]
{
get
{
if (lengthOfWord == 0)
{
return(null);
}
Node next = _root;
int wordOffset = line.Offset + offsetInLine;
if (_caseSensitive)
{
for (int i = 0; i < lengthOfWord; ++i)
{
int index = document.GetCharAt(wordOffset + i) % 256;
next = next[index];
if (next == null)
{
return(null);
}
if (next.Color != null && TextHelper.CompareSegment(document, wordOffset, lengthOfWord, next.Word))
{
return(next.Color);
}
}
}
else
{
for (int i = 0; i < lengthOfWord; ++i)
{
int index = Char.ToUpper(document.GetCharAt(wordOffset + i)) % 256;
next = next[index];
if (next == null)
{
return(null);
}
if (next.Color != null && TextHelper.CompareSegment(document, wordOffset, lengthOfWord, next.Word, _caseSensitive))
{
return(next.Color);
}
}
}
return(null);
}
}
