insert_text

Inserts n_chars characters of chars into the contents of the buffer, at position position.

If n_chars is negative, then characters from chars will be inserted until a null-terminator is found. If position or n_chars are out of bounds, or the maximum buffer text length is exceeded, then they are coerced to sane values.

Note that the position and length are in characters, not in bytes.

Parameters:

this	a TextBuffer
position	the position at which to insert text.
chars	the text to insert into the buffer.
n_chars	the length of the text in characters, or -1

Returns:

The number of characters actually inserted.