Sync OpenBSD patchset 584:

Permit panes to be referred to as "top", "bottom", "top-left" etc, if the right
pane can be identified.

1 files changed, 167 insertions, 0 deletions

diff --git a/layout-string.c b/layout-string.c
new file mode 100644
index 00000000..50f2de71
--- /dev/null
+++ b/layout-string.c
@@ -0,0 +1,167 @@
+/* $Id: layout-string.c,v 1.1 2009-12-10 16:52:58 tcunha 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 <stdlib.h>
+#include <string.h>
+
+#include "tmux.h"
+
+/*
+ * Figure out the pane position based on a description. Fairly simple right
+ * now, just understands a set of strings: left, right, top, bottom, top-left
+ * top-right, bottom-left, bottom-right.
+ */
+
+struct layout_cell *layout_find_top(struct layout_cell *);
+struct layout_cell *layout_find_bottom(struct layout_cell *);
+struct layout_cell *layout_find_left(struct layout_cell *);
+struct layout_cell *layout_find_right(struct layout_cell *);
+struct layout_cell *layout_find_topleft(struct layout_cell *);
+struct layout_cell *layout_find_topright(struct layout_cell *);
+struct layout_cell *layout_find_bottomleft(struct layout_cell *);
+struct layout_cell *layout_find_bottomright(struct layout_cell *);
+
+/* Find the cell; returns NULL if string not understood. */
+struct layout_cell *
+layout_find_string(struct window *w, const char *s)
+{
+	struct layout_cell	*lc = w->layout_root;
+
+	if (strcasecmp(s, "top") == 0)
+		lc = layout_find_top(lc);
+	else if (strcasecmp(s, "bottom") == 0)
+		lc = layout_find_bottom(lc);
+	else if (strcasecmp(s, "left") == 0)
+		lc = layout_find_left(lc);
+	else if (strcasecmp(s, "right") == 0)
+		lc = layout_find_right(lc);
+	else if (strcasecmp(s, "top-left") == 0)
+		lc = layout_find_topleft(lc);
+	else if (strcasecmp(s, "top-right") == 0)
+		lc = layout_find_topright(lc);
+	else if (strcasecmp(s, "bottom-left") == 0)
+		lc = layout_find_bottomleft(lc);
+	else if (strcasecmp(s, "bottom-right") == 0)
+		lc = layout_find_bottomright(lc);
+
+	if (lc == NULL || lc->type != LAYOUT_WINDOWPANE)
+		return (NULL);
+	return (lc);
+}
+
+/*
+ * Find the top cell. Because splits in the same direction are stored as a
+ * list, this is just the first in the list. Return NULL if no topmost cell.
+ * For an unnested cell (not split), the top cell is always itself.
+ */
+struct layout_cell *
+layout_find_top(struct layout_cell *lc)
+{
+	if (lc->type == LAYOUT_WINDOWPANE)
+		return (lc);
+	else if (lc->type == LAYOUT_TOPBOTTOM)
+		return (TAILQ_FIRST(&lc->cells));
+	return (NULL);
+}
+
+/*
+ * Find the bottom cell. Similarly to the top cell, this is just the last in
+ * the list.
+ */
+struct layout_cell *
+layout_find_bottom(struct layout_cell *lc)
+{
+	if (lc->type == LAYOUT_WINDOWPANE)
+		return (lc);
+	else if (lc->type == LAYOUT_TOPBOTTOM)
+		return (TAILQ_LAST(&lc->cells, layout_cells));
+	return (NULL);
+}
+
+/* Find the left cell. */
+struct layout_cell *
+layout_find_left(struct layout_cell *lc)
+{
+	if (lc->type == LAYOUT_WINDOWPANE)
+		return (lc);
+	else if (lc->type == LAYOUT_LEFTRIGHT)
+		return (TAILQ_FIRST(&lc->cells));
+	return (NULL);
+}
+
+/* Find the right cell. */
+struct layout_cell *
+layout_find_right(struct layout_cell *lc)
+{
+	if (lc->type == LAYOUT_WINDOWPANE)
+		return (lc);
+	else if (lc->type == LAYOUT_LEFTRIGHT)
+		return (TAILQ_LAST(&lc->cells, layout_cells));
+	return (NULL);
+}
+
+/*
+ * Find the top-left cell. This means recursing until there are no more moves
+ * to be made.
+ */
+struct layout_cell *
+layout_find_topleft(struct layout_cell *lc)
+{
+	if (lc->type == LAYOUT_WINDOWPANE)
+		return (lc);
+	lc = TAILQ_FIRST(&lc->cells);
+	return (layout_find_topleft(lc));
+}
+
+/* Find the top-right cell. */
+struct layout_cell *
+layout_find_topright(struct layout_cell *lc)
+{
+	if (lc->type == LAYOUT_WINDOWPANE)
+		return (lc);
+	if (lc->type == LAYOUT_LEFTRIGHT)
+		lc = TAILQ_LAST(&lc->cells, layout_cells);
+	else
+		lc = TAILQ_FIRST(&lc->cells);
+	return (layout_find_topright(lc));
+}
+
+/* Find the bottom-left cell. */
+struct layout_cell *
+layout_find_bottomleft(struct layout_cell *lc)
+{
+	if (lc->type == LAYOUT_WINDOWPANE)
+		return (lc);
+	if (lc->type == LAYOUT_LEFTRIGHT)
+		lc = TAILQ_FIRST(&lc->cells);
+	else
+		lc = TAILQ_LAST(&lc->cells, layout_cells);
+	return (layout_find_bottomleft(lc));
+}
+
+/* Find the bottom-right cell. */
+struct layout_cell *
+layout_find_bottomright(struct layout_cell *lc)
+{
+	if (lc->type == LAYOUT_WINDOWPANE)
+		return (lc);
+	lc = TAILQ_LAST(&lc->cells, layout_cells);
+	return (layout_find_bottomright(lc));
+}