Clean up manual layout code:

- change the one layout function into two _refresh and _resize
- create layout-manual.c for manual layout code
- move the fit panes/update panes code from window.c to the new file as it is only used by manual layout now
- move the resize pane code into layout-manual.c as well
- get rid of the direct calls to fit/update and make them go through layout
- rename a couple of variables

This is mainly as a first step before reworking the manual layout code to see if anything breaks.

1 files changed, 183 insertions, 0 deletions

diff --git a/layout-manual.c b/layout-manual.c
new file mode 100644
index 00000000..46a49320
--- /dev/null
+++ b/layout-manual.c
@@ -0,0 +1,183 @@
+/* $Id: layout-manual.c,v 1.1 2009-05-18 21:01:38 nicm Exp $ */
+
+/*
+ * Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+
+#include "tmux.h"
+
+void	layout_manual_update_offsets(struct window *);
+
+void
+layout_manual_refresh(struct window *w, unused int active_only)
+{
+	struct window_pane	*wp;
+	u_int			 npanes, canfit, total;
+	int			 left;
+
+	if (active_only)
+		return;
+
+	if (TAILQ_EMPTY(&w->panes))
+		return;
+
+	/* Clear hidden flags. */
+	TAILQ_FOREACH(wp, &w->panes, entry)
+	    	wp->flags &= ~PANE_HIDDEN;
+
+	/* Check the new size. */
+	npanes = window_count_panes(w);
+	if (w->sy <= PANE_MINIMUM * npanes) {
+		/* How many can we fit? */
+		canfit = w->sy / PANE_MINIMUM;
+		if (canfit == 0) {
+			/* None. Just use this size for the first. */
+			TAILQ_FOREACH(wp, &w->panes, entry) {
+				if (wp == TAILQ_FIRST(&w->panes))
+					wp->sy = w->sy;
+				else
+					wp->flags |= PANE_HIDDEN;
+			}
+		} else {
+			/* >=1, set minimum for them all. */
+			TAILQ_FOREACH(wp, &w->panes, entry) {
+				if (canfit-- > 0)
+					wp->sy = PANE_MINIMUM - 1;
+				else
+					wp->flags |= PANE_HIDDEN;
+			}
+			/* And increase the first by the rest. */
+			TAILQ_FIRST(&w->panes)->sy += 1 + w->sy % PANE_MINIMUM;
+		}
+	} else {
+		/* In theory they will all fit. Find the current total. */
+		total = 0;
+		TAILQ_FOREACH(wp, &w->panes, entry)
+			total += wp->sy;
+		total += npanes - 1;
+
+		/* Growing or shrinking? */
+		left = w->sy - total;
+		if (left > 0) {
+			/* Growing. Expand evenly. */
+			while (left > 0) {
+				TAILQ_FOREACH(wp, &w->panes, entry) {
+					wp->sy++;
+					if (--left == 0)
+						break;
+				}
+			}
+		} else {
+			/* Shrinking. Reduce evenly down to minimum. */
+			while (left < 0) {
+				TAILQ_FOREACH(wp, &w->panes, entry) {
+					if (wp->sy <= PANE_MINIMUM - 1)
+						continue;
+					wp->sy--;
+					if (++left == 0)
+						break;
+				}
+			}
+		}
+	}
+
+	/* Now do the resize. */
+	TAILQ_FOREACH(wp, &w->panes, entry) {
+		wp->sy--;
+	    	window_pane_resize(wp, w->sx, wp->sy + 1);
+	}
+
+	/* Fill in the offsets. */
+	layout_manual_update_offsets(w);
+
+	/* Switch the active window if necessary. */
+	window_set_active_pane(w, w->active);
+}
+
+void
+layout_manual_resize(struct window_pane *wp, int adjust)
+{
+	struct window		*w = wp->window;
+	struct window_pane	*wq;
+
+	if (adjust > 0) {
+		/*
+		 * If this is not the last pane, keep trying to increase size
+		 * and remove it from the next panes. If it is the last, do
+		 * so on the previous pane.
+		 */
+		if (TAILQ_NEXT(wp, entry) == NULL) {
+			if (wp == TAILQ_FIRST(&w->panes)) {
+				/* Only one pane. */
+				return;
+			}
+			wp = TAILQ_PREV(wp, window_panes, entry);
+		}
+		while (adjust-- > 0) {
+			wq = wp;
+			while ((wq = TAILQ_NEXT(wq, entry)) != NULL) {
+				if (wq->sy <= PANE_MINIMUM)
+					continue;
+				window_pane_resize(wq, wq->sx, wq->sy - 1);
+				break;
+			}
+			if (wq == NULL)
+				break;
+			window_pane_resize(wp, wp->sx, wp->sy + 1);
+		}
+	} else {
+		adjust = -adjust;
+		/*
+		 * If this is not the last pane, keep trying to reduce size
+		 * and add to the following pane. If it is the last, do so on
+		 * the previous pane.
+		 */
+		wq = TAILQ_NEXT(wp, entry);
+		if (wq == NULL) {
+			if (wp == TAILQ_FIRST(&w->panes)) {
+				/* Only one pane. */
+				return;
+			}
+			wq = wp;
+			wp = TAILQ_PREV(wq, window_panes, entry);
+		}
+		while (adjust-- > 0) {
+			if (wp->sy <= PANE_MINIMUM)
+				break;
+			window_pane_resize(wq, wq->sx, wq->sy + 1);
+			window_pane_resize(wp, wp->sx, wp->sy - 1);
+		}
+	}
+
+	layout_manual_update_offsets(w);
+}
+
+void
+layout_manual_update_offsets(struct window *w)
+{
+	struct window_pane     *wp;
+	u_int			yoff;
+
+	yoff = 0;
+	TAILQ_FOREACH(wp, &w->panes, entry) {
+		if (wp->flags & PANE_HIDDEN)
+			continue;
+		wp->xoff = 0;
+		wp->yoff = yoff;
+		yoff += wp->sy + 1;
+	}
+}