/// <summary>
/// Updates this <code>LineBreakMeasurer</code> after a single
/// character is inserted into the text, and sets the current
/// position to the beginning of the paragraph.
/// </summary>
/// <param name="newParagraph"> the text after the insertion </param>
/// <param name="insertPos"> the position in the text at which the character
/// is inserted </param>
/// <exception cref="IndexOutOfBoundsException"> if <code>insertPos</code> is less
/// than the start of <code>newParagraph</code> or greater than
/// or equal to the end of <code>newParagraph</code> </exception>
/// <exception cref="NullPointerException"> if <code>newParagraph</code> is
/// <code>null</code> </exception>
/// <seealso cref= #deleteChar </seealso>
public void InsertChar(AttributedCharacterIterator newParagraph, int insertPos)
{
Measurer.InsertChar(newParagraph, insertPos);
Limit = newParagraph.EndIndex;
Pos = Start = newParagraph.BeginIndex;
CharIter.Reset(Measurer.Chars, newParagraph.BeginIndex);
BreakIter.SetText(CharIter);
}
private void MakeLayoutWindow(int localStart)
{
int compStart = localStart;
int compLimit = FChars.Length;
// If we've already gone past the layout window, format to end of paragraph
if (LayoutCount > 0 && !HaveLayoutWindow)
{
float avgLineLength = System.Math.Max(LayoutCharCount / LayoutCount, 1);
compLimit = System.Math.Min(localStart + (int)(avgLineLength * EST_LINES), FChars.Length);
}
if (localStart > 0 || compLimit < FChars.Length)
{
if (CharIter == null)
{
CharIter = new CharArrayIterator(FChars);
}
else
{
CharIter.Reset(FChars);
}
if (FLineBreak == null)
{
FLineBreak = BreakIterator.LineInstance;
}
FLineBreak.SetText(CharIter);
if (localStart > 0)
{
if (!FLineBreak.IsBoundary(localStart))
{
compStart = FLineBreak.Preceding(localStart);
}
}
if (compLimit < FChars.Length)
{
if (!FLineBreak.IsBoundary(compLimit))
{
compLimit = FLineBreak.Following(compLimit);
}
}
}
EnsureComponents(compStart, compLimit);
HaveLayoutWindow = true;
}
