Gtk.TextBuffer::insert-text

function callback(text_buffer, location:Gtk.TextIter, text:String, len:Number, ):void;

The ::insert-text signal is emitted to insert text in a Gtk.TextBuffer. Insertion actually occurs in the default handler.

Note that if your handler runs before the default handler it must not invalidate the location iter (or has to revalidate it). The default signal handler revalidates it to point to the end of the inserted text.

See also: Gtk.TextBuffer.prototype.insert, Gtk.TextBuffer.prototype.insert_range.