Improved layout code.

Each window now has a tree of layout cells associated with it. In this tree,
each node is either a horizontal or vertical cell containing a list of other
cells running from left-to-right or top-to-bottom, or a leaf cell which is
associated with a pane.

The major functional changes are:

- panes may now be split arbitrarily both horizontally (splitw -h, C-b %) and
  vertically (splitw -v, C-b ");
- panes may be resized both horizontally and vertically (resizep -L/-R/-U/-D,
  bound to C-b left/right/up/down and C-b M-left/right/up/down);
- layouts are now applied and then may be modified by resizing or splitting
  panes, rather than being fixed and reapplied when the window is resized or
  panes are added;
- manual-vertical layout is no longer necessary, and active-only layout is gone
  (but may return in future);
- the main-pane layouts now reduce the size of the main pane to fit all panes
  if possible.

Thanks to all who tested.

1 files changed, 0 insertions, 1 deletions

diff --git a/cmd-up-pane.c b/cmd-up-pane.c
index 2f092ece..8b262c60 100644
--- a/cmd-up-pane.c
+++ b/cmd-up-pane.c
@@ -54,7 +54,6 @@ cmd_up_pane_exec(struct cmd *self, struct cmd_ctx *ctx)
 		w->active = TAILQ_PREV(w->active, window_panes, entry);
 		if (w->active == NULL)
 			w->active = TAILQ_LAST(&w->panes, window_panes);
-		layout_refresh(w, 1);
 	} while (!window_pane_visible(w->active));
 
 	return (0);