Fix up visibility so that focus, cursor_visible and blink interact

Fix up visibility so that focus, cursor_visible and blink interact

Fri Sep  8 14:28:00 2000  Owen Taylor  <otaylor@redhat.com>

	* gtk/gtktextview.c: Fix up visibility so that focus,
	cursor_visible and blink interact properly.  Reenable cursor blink
	which had been roughly disabled. Make blink and focus
	properly per-view.

	* gtk/gtktextlayout.[ch] (gtk_text_layout_set_cursor_visible):
	Add a flag for whether to display insertion cursor and
	a function to set the flag.

	* gtk/gtktextlayout.c (gtk_text_layout_get_line_yrange): Change
	get_line_y() to get_line_yrange(), to be a bit more generally
	useful.