Sets the layout text and attribute list from marked-up text.
See [Pango Markup](pango_markup.html)).
Replaces the current text and attribute list.
This is the same as [[email protected]_markup_with_accel], but the markup text isn't scanned for accelerators.
| this |
a `PangoLayout` |
| markup |
marked-up text |
| length |
length of marked-up text in bytes, or -1 if |