Emitted to insert text in a `GtkTextBuffer`.
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: [[email protected]], [[email protected]_range].
| len |
length of the inserted text in bytes |
| location |
position to insert |
| text |
the UTF-8 text to be inserted |