libcons/

2002-09-09  Marcus Brinkmann  <marcus@gnu.org>

	* Makefile (SRCS): Add vcons-scrollback.c.
	* vcons-scrollback.c: New file.
	* cons.h (struct vcons): Add SCROLLING member.
	* file-changed.c: Include <assert.h>.
	(cons_S_file_changed): Be careful to take VCONS->scrolling into
	account when doing clipping and scrolling.

	* cons-switch.c: Roll back to earlier version with vcons ->
	vcons_entry adjustments.  The user is now expected to hold a
	reference to the VCONS.
	* cons.h: Fix prototype, too.

	* vcons-open.c (cons_vcons_open): Initialize VCONS->lock,
	VCONS->input and VCONS->display.

utils/
2002-09-09  Marcus Brinkmann  <marcus@gnu.org>

	* console-ncurses.c (console_switch): Keep a reference to the port
	instead refering to it by number.

1 files changed, 9 insertions, 4 deletions

diff --git a/libcons/cons.h b/libcons/cons.h
index e7484db5..6b2fca49 100644
--- a/libcons/cons.h
+++ b/libcons/cons.h
@@ -103,6 +103,8 @@ struct vcons
       cons_change_t *buffer;
     } changes;
   } state;
+
+  uint32_t scrolling;
 };
 
 struct cons
@@ -206,10 +208,13 @@ void cons_vcons_add (cons_t cons, vcons_list_t vcons_entry);
    virtual console entry is removed.  CONS is locked.  */
 void cons_vcons_remove (cons_t cons, vcons_list_t vcons_entry);
 
-/* Open the virtual console ID or the ACTIVE_ID plus DELTA one in CONS
-   and return it in R_VCONS.  */
-error_t cons_switch (cons_t cons, int active_id, int id, int delta,
-		     vcons_t *r_vcons);
+/* Open the virtual console ID or the virtual console DELTA steps away
+   from VCONS in the linked list and return it in R_VCONS, which will
+   be locked.  */
+error_t cons_switch (vcons_t vcons, int id, int delta, vcons_t *r_vcons);
+
+/* Scroll back into the history of VCONS by DELTA lines.  */
+int cons_vcons_scrollback (vcons_t vcons, int delta);
 
 
 extern const struct argp cons_startup_argp;