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, 17 insertions, 2 deletions

diff --git a/cmd-rotate-window.c b/cmd-rotate-window.c
index e730dc59..c69fa8d1 100644
--- a/cmd-rotate-window.c
+++ b/cmd-rotate-window.c
@@ -59,6 +59,7 @@ cmd_rotate_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 	struct winlink		*wl;
 	struct window		*w;
 	struct window_pane	*wp, *wp2;
+	struct layout_cell	*lc;
 	u_int			 sx, sy, xoff, yoff;
 
 	if ((wl = cmd_find_window(ctx, data->target, NULL)) == NULL)
@@ -70,42 +71,56 @@ cmd_rotate_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 		TAILQ_REMOVE(&w->panes, wp, entry);
 		TAILQ_INSERT_HEAD(&w->panes, wp, entry);
 
+		lc = wp->layout_cell;
 		xoff = wp->xoff; yoff = wp->yoff;
 		sx = wp->sx; sy = wp->sy;
 		TAILQ_FOREACH(wp, &w->panes, entry) {
 			if ((wp2 = TAILQ_NEXT(wp, entry)) == NULL)
 				break;
+			wp->layout_cell = wp2->layout_cell;
+			if (wp->layout_cell != NULL)
+				wp->layout_cell->wp = wp;
 			wp->xoff = wp2->xoff; wp->yoff = wp2->yoff;
 			window_pane_resize(wp, wp2->sx, wp2->sy);
 		}
+		wp->layout_cell = lc;
+		if (wp->layout_cell != NULL)
+			wp->layout_cell->wp = wp;
 		wp->xoff = xoff; wp->yoff = yoff;
 		window_pane_resize(wp, sx, sy);
 
 		if ((wp = TAILQ_PREV(w->active, window_panes, entry)) == NULL)
 			wp = TAILQ_LAST(&w->panes, window_panes);
 		window_set_active_pane(w, wp);
+		server_redraw_window(w);
 	} else {
 		wp = TAILQ_FIRST(&w->panes);
 		TAILQ_REMOVE(&w->panes, wp, entry);
 		TAILQ_INSERT_TAIL(&w->panes, wp, entry);
 
+		lc = wp->layout_cell;
 		xoff = wp->xoff; yoff = wp->yoff;
 		sx = wp->sx; sy = wp->sy;
 		TAILQ_FOREACH_REVERSE(wp, &w->panes, window_panes, entry) {
 			if ((wp2 = TAILQ_PREV(wp, window_panes, entry)) == NULL)
 				break;
+			wp->layout_cell = wp2->layout_cell;
+			if (wp->layout_cell != NULL)
+				wp->layout_cell->wp = wp;
 			wp->xoff = wp2->xoff; wp->yoff = wp2->yoff;
 			window_pane_resize(wp, wp2->sx, wp2->sy);
 		}
+		wp->layout_cell = lc;
+		if (wp->layout_cell != NULL)
+			wp->layout_cell->wp = wp;
 		wp->xoff = xoff; wp->yoff = yoff;
 		window_pane_resize(wp, sx, sy);
 
 		if ((wp = TAILQ_NEXT(w->active, entry)) == NULL)
 			wp = TAILQ_FIRST(&w->panes);
 		window_set_active_pane(w, wp);
+		server_redraw_window(w);
 	}
 
-	layout_refresh(w, 0);
-
 	return (0);
 }