/// <summary>
/// Updates the <code>TextMeasurer</code> after a single character has
/// been deleted
/// from the paragraph currently represented by this
/// <code>TextMeasurer</code>. After this call, this
/// <code>TextMeasurer</code> is equivalent to a new <code>TextMeasurer</code>
/// created from the text; however, it will usually be more efficient
/// to update an existing <code>TextMeasurer</code> than to create a new one
/// from scratch.
/// </summary>
/// <param name="newParagraph"> the text of the paragraph after performing
/// the deletion. Cannot be null. </param>
/// <param name="deletePos"> the position in the text where the character was removed.
/// Must not be less than
/// the start of <code>newParagraph</code>, and must not be greater than the
/// end of <code>newParagraph</code>. </param>
/// <exception cref="IndexOutOfBoundsException"> if <code>deletePos</code> is
/// less than the start of <code>newParagraph</code> or greater
/// than the end of <code>newParagraph</code> </exception>
/// <exception cref="NullPointerException"> if <code>newParagraph</code> is
/// <code>null</code> </exception>
public void DeleteChar(AttributedCharacterIterator newParagraph, int deletePos)
{
FStart = newParagraph.BeginIndex;
int end = newParagraph.EndIndex;
if (end - FStart != FChars.Length - 1)
{
InitAll(newParagraph);
}
char[] newChars = new char[end - FStart];
int changedIndex = deletePos - FStart;
System.Array.Copy(FChars, 0, newChars, 0, deletePos - FStart);
System.Array.Copy(FChars, changedIndex + 1, newChars, changedIndex, end - deletePos);
FChars = newChars;
if (FBidi != null)
{
FBidi = new Bidi(newParagraph);
if (FBidi.LeftToRight)
{
FBidi = null;
}
}
FParagraph = StyledParagraph.DeleteChar(newParagraph, FChars, deletePos, FParagraph);
InvalidateComponents();
}
