public bool SetCaretOffset(int offset)
{
if (offset < 0)
{
return(false);
}
SWF.Document document = Document;
int curPos = 0;
SWF.Line line = null;
for (int i = 1; i <= document.Lines; i++)
{
line = document.GetLine(i);
int length = line.Text.ToString().Length;
if (curPos + length >= offset)
{
document.PositionCaret(line, offset - curPos);
return(true);
}
curPos += length;
}
return(false);
}
public void DeleteCharacters(int pos, int count)
{
LineTag tag;
bool streamline = false;
// Can't delete more than the line has
if (pos >= text.Length)
{
return;
}
// Find the first tag that we are deleting from
tag = FindTag(pos + 1);
// Remove the characters from the line
text.Remove(pos, count);
if (tag == null)
{
return;
}
// Check if we're crossing tag boundaries
if ((pos + count) > (tag.Start + tag.Length - 1))
{
int left;
// We have to delete cross tag boundaries
streamline = true;
left = count;
left -= tag.Start + tag.Length - pos - 1;
tag = tag.Next;
// Update the start of each tag
while ((tag != null) && (left > 0))
{
// Cache tag.Length as is will be indireclty modified
// by changes to tag.Start
int tag_length = tag.Length;
tag.Start -= count - left;
if (tag_length > left)
{
left = 0;
}
else
{
left -= tag_length;
tag = tag.Next;
}
}
}
else
{
// We got off easy, same tag
if (tag.Length == 0)
{
streamline = true;
}
}
// Delete empty orphaned tags at the end
LineTag walk = tag;
while (walk != null && walk.Next != null && walk.Next.Length == 0)
{
LineTag t = walk;
walk.Next = walk.Next.Next;
if (walk.Next != null)
{
walk.Next.Previous = t;
}
walk = walk.Next;
}
// Adjust the start Point_ of any tags following
if (tag != null)
{
tag = tag.Next;
while (tag != null)
{
tag.Start -= count;
tag = tag.Next;
}
}
recalc = true;
if (streamline)
{
Streamline(document.Lines);
}
}