Gets the GtkTextIter at the start of the line containing
the coordinate @y.
@y is in buffer coordinates, convert from window coordinates with
[method@Gtk.TextView.window_to_buffer_coords]. If non-%NULL,
@line_top will be filled with the coordinate of the top edge
of the line.
Gets the GtkTextIter at the start of the line containing the coordinate @y.
@y is in buffer coordinates, convert from window coordinates with [method@Gtk.TextView.window_to_buffer_coords]. If non-%NULL, @line_top will be filled with the coordinate of the top edge of the line.